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  • 151.
    Paramasivam, Jithendra
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Awning Arm Folding Mechanism: FA-40 Series2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The necessity to change the mechanism of the arm folding is to make a major

    difference in the field of Sun roofing systems and also to reduce the cost of the

    Awning system. The reduction of cost may help the market of the awning system to

    reach the Upper- Middle Class customers.

    In this project various technical solutions were investigated by simulation

    softwares and the data was taken into consideration. The best solution has been

    processed and investigated in depth with cost and material cost with high

    preference which cannot be exceeded when compared to today’s Awning arm

    folding solution.

    The best solution for replacing today’s mechanism is a torsion spring folding

    mechanism. The torsion spring has been designed and simulated using the

    SolidWorks simulation software. A virtual bench test of the Awning system has

    been created and designed using SolidWorks and the working mechanism has

    been tested virtually.

    The torsion spring’s data was calculated by using a spring dimension calculator.

    The spring data has been included in the bench test and the test simulation has

    been run by a virtual technique and then the result has been obtained by the

    virtual test bench.

    The torsion spring’s stress and strain analysis during maximum load on the

    Awning in an open condition has also been calculated for the study purpose of the

    spring stability and compared with the previous method of the awning system in

    order to calculate the factor of safety (FOS) equal or more stabilise for the

    environment as it has been used.

    The environmental condition is a main focus in this project. There are different

    types of weather conditions in Sweden. Customers may use the Awning during

    rainy weather. While it is raining the rain water are collected on top of the fabric.

    In order to withstand the weight of the water the arm of the awning should be

    strong. Hence the environmental condition is a main factor in this project with

    respective to speed of the wind.

    The economical manufacturing cost for the product and the replacement of the

    arm folding mechanism are mainly focused.

  • 152.
    Pawlus, Paweł
    et al.
    Rzeszóv University of Technology.
    Blunt, LiamHuddersfield University.Rosén, Bengt-GöranHalmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.Thomas, TomHalmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.Wieczorowski, MichalPoznan University of Technology.
    Proceedings of the 12th International Conference on Metrology and Properties of Engineering Surfaces2009Conference proceedings (editor) (Refereed)
  • 153.
    Petersson, Håkan
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg). Maskinkonstruktion, Institutionen för designvetenskaper LTH Lunds Universitet, Sverige.
    Kriterieframtagningsformulär för lyfthjälpmedel inom bilindustrin2008Report (Other academic)
    Abstract [en]

    This technical report is part of the work that is performed under a MERA project, L-FAM II. Between 2006 and 2008 this was a part of a research project between Volvo AB, VINNOVA, Flex Prop AB, Halmstad University and Lund University. L-FAM II was the name of the project and it was to help the industry to facilitate flexible lifting aids for their chassis-building. Criterion is an important part in this project since some of those controls with the accuracy of the finished product will receive. This accuracy is reflected immediately when the product goes into production where it must secure the geometry of products for the welding of body components and cabins.

    In this project, carbon fiber materials have been an important part. The advantage of carbon fiber is its low weight in relation to its stiffness. The cost of the material is not in its favor.

    The lifting devices that means here are constructed based on these criteria and are already in production. The system has been named NBT2 and is a patented solution in which ABB is the owner of the patent. The patent describes the method and process of how NBT2 is constructed and are described more in paten document No. WO 01/94191 A1.

    20 different criteria have been developed which have also been approved by the project stakeholders. A survey was done early in the project where we consulted a number of people who have good insight into the product. The criteria are only part of the work of what WP1 will perform where the goal is a completed computer-based design systems. The report includes a description of what this computer based design system will perform. The various digital tools and utilities that will be used are explained in the report.

    There are still information missing from the rest of the WP inside the project which has force Wp1 to perform a series of tensile tests where the goal is to find a template for how to use materials from product geometric design. The goal is that this computer-based design system should be ready in late 2010.

  • 154.
    Petersson, Håkan
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg). Faculty of Engineering LTH, Lund University, Lund, Sweden.
    Template-Based Design Analysis: An Alternative Approach for the Engineering Designer to Perform Computer-Based Design Analysis2016Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The current trend in industry to encourage engineering designers to take an active part in the analysis of their own design solutions is apparent in many companies today, domestically as well as abroad.

    From a research project with the objective to develop a computer-based design system for the design of lightweight grippers, one of the major difficulties was to overcome the system users’ lack of knowledge and experience in the design of lightweight structures and Computer-Based Design Analysis (CBDA). CBDA here refers to the use of analysis tools such as Finite Element Analysis (FEA) and computer-based structural optimization. In order to handle these difficulties, the author introduced the use of templates. In the given context, a template refers to an especially preformatted code, which contains the implemented information/knowledge necessary to perform a specific task on an operational level. It should be noted that the use of templates as a means of support in performing a specific design or analysis task is not a new phenomenon in industrial practice. Inspired by the opportunities provided by the template approach, the main objective set out for the thesis project was to facilitate the active participation of the engineering designers in performing CBDA singlehandedly, or in any other organizational setting, by utilizing a Template-Based Design Analysis (TBDA) approach, as an integrated part of their activities within the engineering design process.

    The evolutionary research approach for the development of the TBDA approach is based on surveys in Swedish as well as international industry, literature surveys, the development of a Generic Design Analysis (GDA) process model (facilitating integration of the activities between CBDA and engineering design) and a number of demonstrator projects to deepen the insights into TBDA. Note that as the TBDA approach is intended for use in industrial practice, the approach is independent of specific engineering design and product development processes utilized in industry.

    The conclusion of the thesis work clearly supports the claim that TBDA is not only a competitive approach to current alternatives in supporting the engineering designers performing CBDA, but also of a complementary nature providing functionality not included in the alternative approaches currently used in industrial practice.

  • 155.
    Petersson, Håkan
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Utveckling av konstruktionssystem2013Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 156.
    Petersson, Håkan
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Eriksson, Martin
    Division of Machine Design, Department of Design Sciences, LTH, Lund University, Sweden.
    Motte, Damien
    Division of Machine Design, Department of Design Sciences, LTH, Lund University, Sweden.
    Bjärnemo, Robert
    Division of Machine Design, Department of Design Sciences, LTH, Lund University, Sweden.
    A process model for the design analysis clarification task2012In: Proceedings of 9th NordDesign Conference / [ed] Kyvsgaard Hansen, P.; Rasmussen, J.; Jörgensen, K.; Tollestrup, C., Aalborg & Glasgow: Aalborg University & University of Strathclyde , 2012, p. 494-501Conference paper (Refereed)
    Abstract [en]

    Many product development projects nowadays use computer-aided engineering systems in the analysis of product proposals. It is therefore important to appropriately integrate the analyses activities in the product development process. One important aspect of this integration is how to handle the initiation of the task: identifying the need, planning the task and its monitoring, and communicating it to the analyst. To that end, this paper proposes and illustrates a product development process model that aims to efficiently and effectively prepare a design analysis task.

  • 157.
    Petersson, Håkan
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Motte, Damien
    Department of Design Sciences LTH Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Department of Design Sciences LTH Lund University, Lund, Sweden.
    Carbon Fiber Composite Materials in Modern Day Automotive Production Lines – A Case Study2013In: ASME 2013 International Mechanical Engineering Congress and Exposition: Volume 2A: Advanced Manufacturing, New York: ASME Press, 2013, article id V02AT02A037Conference paper (Refereed)
    Abstract [en]

    New and innovative production equipment can be developed by introducing lightweight materials in modern day automotive industry production lines. The properties of these new materials are expected to result in improved ergonomics, energy savings, increased flexibility and more robust equipment, which in the end will result in enhanced productivity. Carbon composite materials are one such alternative that has excellent material properties. These properties are well documented, and the market for carbon composite materials is growing in many areas such as commercial aircrafts, sporting goods and wind turbines. However, when studying the use of carbon composite materials for production equipment in the automotive industry, it was found that there were few, if any, such examples.

    This paper focuses on innovative ways of making carbon composite materials available for designing automotive industry production equipment by introducing a design and material concept that combines flexibility, relatively low costs and high functionality. By reducing the weight by 60%, it was obvious that the operators were very positive to the new design. But just as important as the improvement of the ergonomic feature, the combination of low weight and material properties resulted in a more robust design and a more stable process of operation. The two main designs (two versions of the steel-based design were constructed) were developed sequentially, making it difficult to compare development costs since knowledge migrated from one project to the next. In this study, the gripper was manufactured in both carbon composite material and steel. The different designs were compared with reference to design costs, functionality, robustness, product costs and ergonomics. The study clearly shows that the composite material represents a favorable alternative to conventional materials, as the system combines superior properties without significantly increasing the cost of the equipment. This paper describes the approach in detail. Copyright © 2013 by ASME

  • 158.
    Petersson, Håkan
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Motte, Damien
    Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Lund University, Lund, Sweden.
    Using Templates To Support The Engineering Designer Performing Computer-Based Design Analysis2015In: ASME 2015 International Mechanical Engineering Congress and Exposition: November 13-19, 2015, Houston, Texas, USA, New York: ASME Press, 2015, Vol. 11, article id V011T14A002Conference paper (Refereed)
    Abstract [en]

    In their quest for a more efficient and effective utilization of the resources allocated to engineering design projects, and thus to the overall product development project from which the current design task(s) originate, an increasing number of companies allow engineering designers to perform Computer-Based Design Analysis (CBDA) on their own – CBDA is here confined to quantitative analyses using finite element-based structural and thermal analyses, Computational Fluid Dynamics, and Multi-Body Systems. Since all of these tools require a certain level of expertise in order to be successfully utilized in industrial practice, the types of analyses performed by the engineering designers are confined to simple, straightforward ones.

    In striving for an increase of the individual engineering designer’s possibilities to actively participate in CBDA in industrial practice, an online survey has been carried out and reported in [1]. The main objective set out for this survey was to give an overview of the current situation in the global industry regarding CBDA-tasks being performed by engineering designers, what positive effects it might present to the industry and how it should be implemented for best result. Resulting from this survey, one new support, Template Based Design Analysis (TBDA), singled out as very promising for future development. TBDA is a support to be used in engineering design analyses based on the utilization of the advanced features provided by high-end Computer Aided Design (CAD)/Computer Aided Engineering (CAE) software in supporting, guiding as well as monitoring the design analysis performed by the engineering designer. It was also found that TBDA was gradually being introduced in some industrial companies.

    Since TBDA is still in its infancy, substantial development needs to be invested in it to make it the full-blown support needed in industrial practice. To be able to contribute to the development of TBDA, it is essential to acquire knowledge about how companies, both national and international, are planning to introduce and utilize TBDA in industrial practice.

    To that end a new online survey has been carried out, focusing on the introduction and benefits associated with TBDA. Out of a total of 64 respondents, 41 of the these were selected from the previous survey [1] and 23 came from companies known to the authors to utilize CBDA on a regular basis; these 23 were invited to participate in the interviews and as a first step, before carrying out the interviews, all of them were requested to answer the survey. 42 of them, from 17 countries, completed the online-survey. In addition to this survey, 5 Swedish companies, all utilizing CBDA on a regular basis, were participating in qualitative interviews. The main objective was to get an in-depth view on the use of engineering designers performing CBDA as well as an indication on the validity of the responses obtained in the online survey by comparing the results from the interviews and the companies response to the online survey – all companies interviewed answered the online survey in advance before the interviews were carried out.

    The introduction of TBDA in an industrial setting has resulted in many advantages, such as shorter lead times, opportunities to generate more concept candidates, and increased collaboration between the engineering designers and the design analysts, all of them contributing to more mature technical solutions. Three different automation levels of TBDA have also been identified and accounted for as well as being exemplified. In the companies in which TBDA has not been implemented, some of the reasons for not doing so are high costs, company policy, and the lack of knowledge and experience on the part of the engineering designer. This paper presents the results both from the new online survey as well as from the interviews. © 2015 by ASME

  • 159.
    Petersson, Håkan
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Motte, Damien
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Lund University, Lund, Sweden.
    Eriksson, Martin
    Lund University, Lund, Sweden.
    The Engineering Designer in the Role of a Design Analyst – An Industrial Survey2015Conference paper (Refereed)
    Abstract [en]

    Traditionally, design analysts are solely responsible for all computer-based design analysis (CBDA). CBDA refers to quantitative design analyses utilizing computational tools in the engineering design and development of technical solutions. There are currently limited insights into and knowledge of tools and methods needed to facilitate the use of CBDA by engineering designers. In order to gather information on this aspect of CBDA, an industry survey has been performed. 77 persons completed the survey (16% affiliated to NAFEMS) open for twelve weeks during October-December, 2014. Around 35% answered that within their companies CBDA is used by engineering designers, and 28% of those who are not currently doing so expect to do so in the future. Linear static analysis is the most frequent type of analysis performed by engineering designers. The benefits put forward by the respondents in favor of involving engineering designers in CBDA are: it allows early evaluation of concept candidates, shortens lead time, frees resources for the analysis department, and reduces costs. 26% of the respondents answered that there is resistance from the analysis department against allowing engineering designers to perform CBDA, 19% within the engineering design department are also against this involvement and 26% answered that there has been no problem associated with this involvement. Even though the engineering designer performs CBDA on his/her own, supervision (56%) and quality assurance of the analysis results (59%) is the responsibility of the design analysts. This is also the case regarding the development of tools and methods to be used by the engineering designers as well as instruction and training of the engineering designers.

  • 160.
    Petersson, Håkan
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Motte, Damien
    Division of Machine Design, Department of Design Sciences LTH, Lund University, Lund, Sweden.
    Eriksson, Martin
    Division of Machine Design, Department of Design Sciences LTH, Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Division of Machine Design, Department of Design Sciences LTH, Lund University, Lund, Sweden.
    A Computer-Based Design System For Lightweight Grippers in The Automotive Industry2013In: Proceedings of the ASME International Mechanical Engineering Congress and Exposition--2012: presented at ASME 2012 International Mechanical Engineering Congress and Exposition, November 9-15, 2012 Houston, Texas USA, New York: ASME Press, 2013, Vol. 3, p. 169-179Conference paper (Refereed)
    Abstract [en]

    This paper presents the development as well as the architecture of a computer-Aided dedicated fixture design system intended to support the design of lightweight (carbon fiber composite) grippers for a major truck company. Lightweight grippers were required due to the increasing production rates in the automotive industry. The current robotic equipment was facing diverse problems during transportation and aligning of the parts, problems related to mass inertia, accuracy and stability. Moreover, the increased demands for truck customization and fast release of new product versions required a computer-based support for the design of the appropriate fixtures. This application is believed to be of interest for fixture research because the design of such complex fixtures is likely to appear more and more often. Specifically, such fixtures are subject to specific requirements that necessitate a systematic requirement elicitation method; they also require extensive conceptual design work as well as careful analysis activity planning. The main steps requisite for the development of the design system are reported: setup planning, fixture planning, conceptual design of the gripper. The architecture, the process and the constituent elements of the design system are also described and illustrated. Copyright © 2012 by ASME.

  • 161.
    Petersson, Håkan
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Motte, Damien
    LTH Lund University, Lund, Sweden.
    Eriksson, Martin
    LTH Lund University, Lund, Sweden.
    Bjärnemo, Robert
    LTH Lund University, Lund, Sweden.
    Integration of Computer Aided Design Analysis into the Engineering Design Process for use by Engineering Designers2013In: ASME 2013 International Mechanical Engineering Congress and Exposition: Volume 12: Systems and Design, New York: ASME Press, 2013, Vol. 12Conference paper (Refereed)
    Abstract [en]

    When developing products, engineering designers often face the problem that their candidate for a technical solution, ranging from a concept to a detailed design, needs to be analyzed by a design analyst before it is approved or rejected and the engineering designer can continue his/her activities within the product development process. If engineering designers have to send every solution candidate to a design analyst, a lot of time and money is lost. To avoid this, some Swedish companies have started to allow their engineering designers to use the analysis capabilities imbedded in modern CAD/CAE software.

              In the literature on product development and on computer based design analysis (CBDA) both processes are fairly well described. However, this cannot be said about the interaction between the two processes. This is a growing issue as it represents core knowledge for developing efficient and effective integration concepts, which in turn can be developed into likewise efficient and effective approaches on how to assist the engineering designer to perform parts of the CBDA process on his/her own. Note that when we refer to CBDA here, this is confined to the use of FEM in the development of products, primarily based on working principles originating from the area of Mechanical Engineering.

              Since we have been working on a process model for the integration between engineering design and design analysis, this has inspired us to utilize findings from these efforts to propose a conceptual model for a design analysis process driven by the engineering designer to be integrated into the product development process.

              The proposed design analysis process model is based on the use of predefined analysis methods or templates. Templates are also utilized for QA (Quality Assurance) and monitoring of the analysis activities. Responsible for the development of the analysis methods and the templates are expert design analysts, who develop these tools within a technology development process. Before allowing the engineering designers access to them, these tools need to be approved by relevant bodies within the industrial enterprise and/or by external sources such as those responsible for certification and risk management.

              In this paper we present the development of the proposed integrated design analysis process model and an industrial case study, which incorporates a non-linear design analysis activity, utilizing the FEM-program Abaqus within the CAD-software Catia V5 and its imbedded optimization module.

    Copyright © 2013 by ASME

  • 162.
    Pettersson, Håkan
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Bååth, Lars B.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Fotonik och mikrovågsteknik.
    Carlsson, N.
    Division of Solid State Physics, Lund University, Sweden.
    Seifert, W.
    Division of Solid State Physics, Lund University, Sweden.
    Samuelson, L.
    Division of Solid State Physics, Lund University, Sweden.
    Case study of an InAs quantum dot memory: Optical storing and deletion of charge2001In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 79, no 1, p. 78-80Article in journal (Refereed)
    Abstract [en]

    We have studied self-assembled InAs quantum dots embedded in an InP matrix using photocapacitance and photocurrent spectroscopy. These dots are potentially promising for memories due to the large confinement energy for holes. In this work we have realized simple quantum dot memory by placing the dots in the space–charge region of a Schottky junction. Our measurements reveal that a maximum of about one hole can be stored per dot. We also find that illumination for an extended period deletes the stored charge. We show that these limitations do not reflect the intrinsic properties of the dots, but rather the sample structure in combination with deep traps present in the sample.

  • 163.
    Pettersson, Håkan
    et al.
    Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Bååth, Lars B.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Carlsson, Niclas
    Division of Solid State Physics, Lund University, Lund, Sweden.
    Seifert, Werner
    Division of Solid State Physics, Lund University, Lund, Sweden.
    Samuelson, Lars
    Division of Solid State Physics, Lund University, Lund, Sweden.
    Optically induced charge storage and current generation in InAs quantum dots2002In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 65, no 7, p. 0733041-0733044Article in journal (Refereed)
    Abstract [en]

    We report on optically induced charge storage effects and current generation in self-assembled InAs quantum dots embedded in an InP matrix. Illumination with photons of energy higher than about 0.86 eV efficiently loads the dots with a maximum of about 1 hole/dot. The spectral response at lower photon energy is strongly enhanced at elevated temperatures. We present a detailed balance model for the dots and discuss the thermally assisted optical excitation processes pertinent to hole accumulation. We also show that these processes make the dots act as nanometer-scaled temperature-dependent current generators.

  • 164.
    Rebeggiani, Sabina
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    On Polishability of Tool Steels2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    One of the world’s fastest growing industries is the plastic industry. Today’s ever increasing demands of high quality products, shorter lead times and reduced costs push development and research forwards. Moulds for plastic injection moulding need to have a functional surface to meet demands on demoulding and wear properties, but also to produce the required final surface quality, which for ‘standard mould qualities’ of high gloss applications means nearly defect free, shiny and smooth mould surfaces with roughness levels in the nm-range.

    The aim of this thesis was to develop a metrology framework to quantitatively characterise these mould surfaces in order to gain better understanding of which defect structures are critical at injection moulding, and how these are correlated to material properties and operating conditions in surface preparation of tool steels. In practice this means to capture surface features of some few nm in height/depth up to some hundreds of microns in lateral dimension within insert areas of cm2 and larger. Experiments combining polishers’ experience with steel producers’ as well as non-contact areal texture examinations of surface topography were performed to overcome and link practical skills to academic ones.

    Based on areal surface metrology, defect classification and image analysis based surface characterisation, an evaluation procedure for polished tool steel surfaces was developed, initially tested and verified. The suggested method involves descriptions of relevant defect structures and acceptance levels for high gloss polished tool steels in the form of numerical parameter values based on interferometric measurements. It was also concluded that the cleanness of the steels was less important as long as it was kept within reasonable levels; the surface preparation strategy is a major factor influencing the mould surface quality e.g. it was found that a ‘several-step-strategy’ was favourable to avoid defect structures; not all ‘mirror-like’ mould surfaces had desirable topographies for injection moulding, therefore a well-defined mould surface assessment with numerical values describing mould surface quality is necessary to secure effective mould surfaces.

  • 165.
    Rebeggiani, Sabina
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Polishability of tool steels: Characterisation of high gloss polished tool steels2009Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The manufacturing of plastic components, like a majority of other mass produced discrete parts, require well designed dies and moulds. Complex geometries and increasing demands on final surface appearance, which is strongly connected to the quality impression, are pushing for high demands on mould-makers and polishers as well as steel producers. Moulds for production of shiny plastic components require tool steels with low defect levels to achieve highly gloss and very smooth mould surfaces (roughness levels in the nm-range).

    It is the ability to achieve those mirror-like surfaces, the polishability of tool steels, that is the central part in this study. To increase the understanding of how material properties and different surface preparation techniques impact the polishability, a selection of high gloss polished tool steel qualities were characterised using non-contact 3D-surface texture analysis.

    A first step towards a grading system of the polishablility was made based on a classification of surface defects detected on included steel samples. 3D surface parameters based on interferometer measurements seemed to be useful for a characterisation, even though further studies (involving different filters and segmentation methods) are needed to find less and more precise parameter values to grade tool steel qualities.

    Future work will include analysis of surface measurements of test moulds and plastic parts, as well as studies of how quantitative parameters can be linked to qualitative estimations in order to better understand how surface features on the mould are transferred into the surface of plastic components.

  • 166.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Behrens, Barbara
    Fraunhofer Institute for Production Technology, Department Process Technology, Aachen, Germany.
    Klocke, Fritz
    Fraunhofer Institute for Production Technology, Department Process Technology, Aachen, Germany.
    Zunke, Richard
    Fraunhofer Institute for Production Technology, Department Process Technology, Aachen, Germany.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Towards robust polishing strategies for moulds and dies2009In: Proceedings of the 3rd Swedish Production Symposium, Göteborg, Sweden, 2-3 December 2009 (SPS09), Swedish Production Academy , 2009Conference paper (Refereed)
    Abstract [en]

    This paper summarises several experiments performed in order to increase the knowledge about the polishing process (e.g. to better understand the origins of different defect structures) and to develop new polishing strategies for dies and moulds with high demands on surface quality, i.e. glossy and ‘defect free’ surfaces. The polishing strategies are not only a help to avoid unwanted surface structures, they will also work as the base for automated polishing systems, which have several advantages compared to manual polishing; vibrating hand tools and monotonic work can be avoided, dust and noise levels as well as total process time can be reduced, and more consistent surface finishes from tool to tool can be achieved.

    A selection of steel samples, polished with different techniques, were analysed to study how the final surface quality was influenced by e.g. the process route, the degree of purity and the microstructure. The surface quality was here represented by roughness values and SEM-images. It could be concluded that the degree of homogeneity and the purity level of the steel materials were crucial to final surface qualities; the lower amount of inclusions, the better the surface quality. Further, a classification of occurred defect structures made.

  • 167.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Dimkovski, Zlate
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Kofod, Guggi
    InMold Biosystems, Taastrup, Denmark.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Empirical Evaluation of Spin-on-Glass-Layers on Steel Surfaces by Wear Tests2014In: Tribologia Finnish Journal of Tribology, ISSN 0780-2285, Vol. 32, no 1, p. 19-24Article in journal (Refereed)
    Abstract [en]

    Dies and moulds with high precision surfaces are being used in various branches, e.g. in the plastic industry where the surface finish are conventionally performed by manual polishers. With ever increasing demands of shorter lead times and reduced costs, efforts have been made to automate this finishing process. This paper presents an empirical study performed to test durability properties of SOG (spin-on-glass)-layers on steel surfaces. The results showed that the thin coating last longer than the thicker ones, and that the harder coatings withstood wear significantly better than the steel reference samples thus motivating further investigations.

  • 168.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Dimkovski, Zlate
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Traceology for polishing process control2014In: Conference Proceedings - 14th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2014 / [ed] R. Leach, Bedford: EUSPEN , 2014, Vol. 1, p. 217-220Conference paper (Refereed)
    Abstract [en]

    Final finishing operations of dies and moulds e.g. in the plastic industry, are conventionally performed by manual polishers. With ever increasing demands of shorter lead times and reduced costs, efforts have been made to automate the finishing process. This paper presents the first step towards a built-in surface inspection system for automated polishing processes, designed to indicate when it is time to shift from one preparation step to the next one. It is based on an evaluation procedure for mirror-like steel surfaces, and a characterisation method used to study scratch patterns on cylinder liner surfaces. This method was further developed/adapted to polished steel surfaces. The results showed that scratch width and height were strong indicators for surface quality evaluation.

  • 169.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Flemming, Leigh
    Huddersfield University, Huddersfield, United Kingdom.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Blunt, Liam
    Huddersfield University, Huddersfield, United Kingdom.
    A Training Consortium to Explore and Exploit Surface Metrology2014Conference paper (Other academic)
    Abstract [en]

    The importance of surface finish in all aspects of manufacturing influences economic considerations as well as environmental aspects and functionality. The ability to effective and efficient characterise surface topography is an important tool in the manufacturers arsenal which is often overlooked or underutilised. By providing a comprehensive, affordable training package, a gap in the industrial knowledge is filled giving manufacturers the ability to increase their competitive edge.

  • 170.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Sandberg, Alf
    Uddeholms AB, Hagfors, Sweden.
    A quantitative method to estimate high gloss polished tool steel surfaces2011In: Proceedings of the 13th International Conference on Metrology and Properties of Engineering Surfaces: 12 – 15 April 2011, Twickenham Stadium, UK / [ed] Richard Leach & Liam Blunt, Teddington: National Physical Laboratory , 2011, p. 35-39Conference paper (Refereed)
    Abstract [en]

    Visual estimations are today the most common way to assess the surface quality of moulds and dies; a method that are both subjective and, with today’s high demands on surfaces, hardly usable to distinguish between the finest surface qualities. Instead a method based on non-contact 3D-surface texture analysis is suggested. Several types of tool steel samples, manually as well as machine polished, were analysed to study different types of surface defects such as pitting, orange peel and outwardly features. The classification of the defect structures serves as a catalogue where known defects are described. Suggestions of different levels of ‘high surface quality’ defined in numerical values adapted to high gloss polished tool steel surfaces are presented. The final goal is to develop a new manual that can work as a ‘standard’ for estimations of tool steel surfaces for steel producers, mould makers, polishers etc.

  • 171.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    A Step-by-Step Analysis of Manual Polishing Sequences2012In: Proceedings of the 9th International Tooling Conference / [ed] Harald Leitner, Regina Kranz, Angelika Tremmel, 2012, p. 317-324Conference paper (Refereed)
    Abstract [en]

    Polishing of tool steels for e.g. injection moulding of plastic parts or direct polishing of products is perhaps the most important industrial finishing process today. Polishing is often made manually to ensure the highest quality and nanometre roughness. This study compare steel samples prepared in different companies to study how different polishing sequences affect final surface qualities, i.e. trying to find crucial factors controlling high gloss appearance and defect levels. The samples were prepared in a way that every step of the polishing process could be studied quantitatively at nanometre level using phase shifting- and coherence scanning interferometry. In addition, all samples were qualitatively documented and judged visually by the polishers themselves. It could be concluded that a ‘several-step’ strategy in combination with short polishing time was advantageous. Also, guidelines for tool and abrasive selection is presented suggesting cotton as carrier and diamonds of 1 µm size for more time efficient final polishing.

  • 172.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Evaluation of a robot assisted polishing equipment2008In: Proceedings (CD) of the 2nd Swedish Production Symposium; Stockholm, Sweden, 2008, p. 6-Conference paper (Refereed)
    Abstract [en]

    This study is based on several tests of a robot assisted polishing equipment, the Strecon RAP-200, which was recently developed by Strecon A/S in purpose to polish punches and dies for metal forming. The main part of the study was a 4-factor 2-level design of experiment, where the influence of pressure, pulse, repetitions and linear speed on the final surfaces were studied with help of both a mechanical stylus and an interferometer.

    The number of repetitions seemed to be the main factor affecting the final surface quality, but also the rotation speed seemed to affect the surface roughness. Further evaluations will be performed in the forthcoming three years.

  • 173.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Factors influencing the surface quality of polished tool steels2014In: Surface Topography: Metrology and Properties, ISSN 2051-672X, Vol. 2, no 3, article id 035004Article in journal (Refereed)
    Abstract [en]

    Today’s demands on surface quality of moulds for injection moulding of plastic components involve no/low defect contents and roughness levels in the nm-range for high gloss applications. Material properties as well as operating conditions influence the mould finish, and thus the final surface of moulded products. This paper focuses on how particle content and different polishing strategies influence final surface qualities of moulds. Visual estimations of polished tool steel samples were combined with non-contact 3D-surface texture analysis in order to correlate traditional assessments to more quantitative methods, and to be able to analyse the surfaces at nanometer-level.

    It was found that steels with a lower proportion of particles, like carbides and oxides, gave rise to smoother polished surfaces. In a comparative study of polishers from different polishing shops, it was found that while different surface preparation strategies can lead to similar final roughness, similar preparation techniques can produce high-quality surfaces from different steel grades. However, the non-contact 3D-surface texture analysis showed that not all smooth polished surfaces have desirable functional topographies for injection moulding of glossy plastic components.

  • 174.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    High gloss polishing of tool steels – step by step2011In: Proceedings of The 4th International Swedish Production Symposium / [ed] J.-E. Ståhl, 2011, p. 257-262Conference paper (Refereed)
    Abstract [en]

    The surface preparation of moulds for high gloss applications, e.g. tools for injection moulding of plastic parts, is still a relatively unknown area. Most knowledge is accumulated by individual polishers with long experience in the field. Literature covering the polishing process/mechanisms is rare and it becomes harder and harder to recruit new skilled polishers. Today it is also a matter of time, and cost; how long time is needed to prepare a new mould? How many steps are needed? Which tools? Is it possible to replace the manual polishers by robots?

    This article is part of a study where equivalent steel samples were prepared in different polishing shops to investigate the surface quality achieved in every step of the process. The polishers have documented their processes and comment on the final results. The main goal was to study how different proceedings affect the final surface quality; which are the crucial factors in order to achieve a high gloss polished surface with low defect levels?

    The sample analysis is based on visual estimations as well as interferometer measurements and belonging surface parameters; e.g. seems the number of preparation steps be crucial to the final surface quality.

  • 175.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Quantitative evaluation of the surface finish of high gloss polished tool steels2014In: Surface Topography: Metrology and Properties, ISSN 2051-672X, Vol. 2, no 1, article id 014002Article in journal (Refereed)
    Abstract [en]

    Standardized procedures to measure and estimate surface qualities of moulds for injection moulding of plastic components do not exist. Instead, steel producers as well as polishers and mould-users need to rely on master plaques for tactile comparisons and/or their own visual estimations for surface quality controls. This paper presents an overview of various surface evaluation methods of steels, including existing standards and available surface metrology. A new method to evaluate high gloss polished tool steel surfaces, based on a three-dimensional non-contacting measurement technique, is presented. The suggested method is based on defect extraction, and should be useful for both specifications and quality controls. Included defects were found to be quality criteria for polished tool steel surfaces. The surface acceptance levels and defect classification are based on interviews and questionnaires, as well as literature studies and visual estimations of test samples made by experienced polishers. © 2014 IOP Publishing Ltd.

  • 176.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Quantitative evaluation of the surface finish of high gloss polished tool steels2013In: Metrology and Properties of Engineering Surfaces, 2013: Proceedings of the 14th International Conference, Taipei, Taiwan, June 17-21, 2013, 2013, p. 207-218Conference paper (Refereed)
    Abstract [en]

    Standardised procedures to measure and estimate surface qualities of moulds for injection moulding of plastic components do not exist. Instead, steel producers as well as polishers and mould-users need to rely on master plaques for tactile comparisons and/or their own visual estimations for surface quality controls.

    This paper presents an overview of various surface evaluation methods of steels, including existing standards and available surface metrology. A new method to evaluate high gloss polished tool steel surfaces, based on a 3D non-contacting measurement technique, is presented. The suggested method is based on defect extraction, and should be useful for both specifications and quality controls. Included defects were found to be quality criteria for polished tool steel surfaces. The surface acceptance levels and defect classification are based on interviews and questionnaires, as well as literature studies and visual estimations of test samples made by experienced polishers.

  • 177.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Sandberg, Alf
    Uddeholms AB, Hagfors, Sweden.
    A quantitative method to estimate high gloss polished tool steel surfaces2011In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 311, no 1, article id 012004Article in journal (Refereed)
    Abstract [en]

    Visual estimations are today the most common way to assess the surface quality of moulds and dies; a method that are both subjective and, with today’s high demands on surfaces, hardly usable to distinguish between the finest surface qualities. Instead a method based on non-contact 3D-surface texture analysis is suggested. Several types of tool steel samples, manually as well as machine polished, were analysed to study different types of surface defects such as pitting, orange peel and outwardly features. The classification of the defect structures serves as a catalogue where known defects are described. Suggestions of different levels of ‘high surface quality’ defined in numerical values adapted to high gloss polished tool steel surfaces are presented. The final goal is to develop a new manual that can work as a ‘standard’ for estimations of tool steel surfaces for steel producers, mould makers, polishers etc.

  • 178.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Sandberg, Alf
    Uddeholm Tooling AB, Hagfors, Sweden.
    Polished injection moulds’ and surface defects’ influence on the quality of plastic components2009In: Proceedings of the 12th International Conference on Metrology and Properties of Engineering Surfaces / [ed] P. Pawlus, L. Blunt, B.-G. Rosén, T. Thomas, M. Wieczorowski, H. Zahouani, Rzeszów: Rzeszów University of Technology , 2009, p. 396-397Conference paper (Refereed)
    Abstract [en]

    The quality of injection mould surfaces is important as it has a major influence on tool performance. In the specific field of plastic moulding, many products require defect free, glossy, and very smooth mould surfaces (roughness parameters in the nm-range) to achieve a satisfactory surface appearance. The surface quality is also crucial for the mould to function properly in the actual tooling application; too rough surfaces might disturb the flow of the polymer melt and increase wear, while too smooth surfaces give rise to sticking problems.

     

    A key factor towards improved tool performance is the development of a metrology framework to characterise the polished surfaces. This paper summarises a study based on a non-contact 3D-surface texture analysis, where tool steel moulds and injection moulded plastic components are characterised in terms of surface quality. Different types of defects, such as non-metallic inclusions and carbides, are studied in more detail to better understand their effect on final plastic component surfaces. Critical defect size?, Types of defects? and Defect distribution? are typical questions at issue. A test mould with intentional manufactured pores and scratches in different sizes and distributions will be designed and verified in order to enable injection mould industry to optimize selection of polymer and process variables with respect to plastic component surface quality and tool material selection.

  • 179.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Sandberg, Alf
    Uddeholms AB, Hagfors, Sweden.
    Surface characterisation of high gloss polished tool steels2009In: Proceedings of the 8th International Tooling Conference: TOOL 09: Tool Steels – Deciding Factor in Worldwide Production: RWTH Aachen University, Aachen, Germany, June 2–4, 2009: Volume II / [ed] P. Beiss, C. Broeckmann, S. Franke & B. Keysselitz, Aachen: Mainz , 2009, p. 953-963Conference paper (Refereed)
    Abstract [en]

    It is well known that high quality tool steels, i.e. steels possessing low contents of defect structures, and the adoption of well developed polishing techniques are required to get satisfactory mould surfaces for plastic forming. However, there is still a lack of knowledge concerning how different defect structures on mould surfaces affect final plastic components, and how tool steel surfaces can be measured and analysed in convenient ways.

    Based on non-contact 3D-surface texture analysis, three test moulds and corresponding injection moulded plastic plaques were characterised with the objective to study how defect structures on the mould surfaces were transferred into the final plastic components.

    Surface structures, remaining scratches and to a certain extent pin-holes originated from the mould surface were all detected on the surface of the plastic components. However, more extensive studies need to be performed in order to understand why different defect structures on tool steels occur, how they can be avoided and, for different plastic products, which the critical limits are (in terms of amount, shape and size of the defects).

  • 180.
    Rebeggiani, Sabina
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Sandberg, Alf
    Uddeholms AB, Hagfors, Sweden.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Tool steel polishing and topography characterization2007In: The Swedish Production Symposium in Göteborg 28-30 August 2007, 2007Conference paper (Other academic)
    Abstract [en]

    Manual polishing is a common method to accomplish a mirror-like mould surface, although it is a cumbersome and time-consuming process. It is, thus, of great interest within the industry to find faster and better polishing techniques to decrease the costs and lead times. A key factor towards improved polishing techniques is to find ways to characterize polished surfaces; which parameters and instruments can be used and what is the definition of polishability? This paper summarises a study where three steel grades were analysed with five different measuring devices. The results showed that mechanical stylus instrumentations are not enough to describe very smooth surfaces, but measurement devices with better resolution are needed, such as interferometers.

  • 181.
    Reddy, Vijeth Venkataram
    et al.
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Vedantha Krishna, Amogh
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Schultheiss, Fredrik
    Lund University, Lund, Sweden.
    Rosén, Bengt Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Lead free Brass: Topography Characterization2016Conference paper (Refereed)
    Abstract [en]

    The negative effects of lead on human health and the recycling problems of copper alloys with lead content has led to the increase in concern for reducing/eliminating the use of lead in brass and other copper alloys. Many materials are considered to replace lead in brass; silicon is one such alternative. The real challenge prevails in sustainable manufacturing of lead free brass, to maintain control of the surface integrity when substituting the lead content in the brass with silicon. The investigation includes defined areal surface parameters measured on the turned samples of lead- and lead free brass using an optical coherence scanning interferometer, CSI.This paper deals with the study of surface topography of turned samples of lead and lead free brass. It is important to study the topographical characteristics of the brass samples which are the intermediate link between the manufacturing process variables and the functional behaviour of the surface. To numerically evaluate the sample’s surface topography and to validate the measurements for a significant study, a general statistical methodology is implemented. The results suggest that the surface roughness is higher in lead brass compared to lead free brass and tool coatings have significant influence on the hybrid (Sdr & Sdq) parameters in the surface topography of brass samples.

  • 182.
    Rehnlund, Andrea
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Konstruktion av transportvagn för mat2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is the result of the class Examensarbete, 15 credits of the mechanical engineering program at Halmstad University. The class represents the final part of the program with the aim to attain a Bachelor of Science. It´s a project made during the spring 2014 in collaboration with Alutrade AB and ScanBox Thermo Products AB.

    The assignment is to develop a new transportation trolley for ScanBox. The aim is to complement their range with a product that opens up to new markets. That set new demands for materials and also manufacturing- and assembly methods. These requirements set the foundation of a new design.

    The result was a primary product concept that has been welcomed by the business. The new trolley has, thanks to its new design a faster installation and a more sustainable environment adaptation. The product is visualized in Catia V5, Keyshot 4 and Photoshop CS6.

  • 183.
    Ribic, Nedjada
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK). Halmstad University.
    Nerhed, Jesper
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK). Halmstad University.
    Contact angle measurment of surfaces cleanliness2015Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
  • 184.
    Rosén, Bengt - Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Wiklund, Daniel
    Swerea, IVF, Gothenburg.
    Liljegren, M.
    Olofström School of Automotive Stamping.
    Berglund, J.
    Sandvik Tooling R & D Center, Olofström.
    Bay, Niels
    Department of Mechanical Engineering Technical University of Denmark.
    Kjellsson, K.
    Volvo Car Corp., Olofström.
    Friction in Sheet Metal Forming: A Comparison Between Milled and Manually Polished Die Surfaces2010Conference paper (Refereed)
    Abstract [en]

    The evolvement of product requirements in the automotive industry, e.g. reduced weight, means that the use of advanced high strength steels (HSS, EHSS,UHSS) in automotive applications is continuously increasing. The introduction of high strength steels in production implies increased tool wear and calls for functional tool surfaces that are durable in these severe tribological conditions. In this study the influence of tool surface topography on friction has been investigated. The frictional response was studied in a Bending Under Tension test. The results did show that a low frictional response was generated by low slope of roughness profiles combined with a strong anisotropy applied perpendicularly to the sliding direction. An improved machining strategy has a high potential to significantly reduce the need for manually polished surfaces.

  • 185.
    Rosén, Bengt Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Anderberg, C.
    Volvo Cars Corporation, Göteborg, Sweden.
    Ohlsson, R.
    Volvo Power Train Corp., Volvo Group, Göteborg, Sweden.
    Parameter correlation study of cylinder liner roughness for production and quality control2008In: Proceedings of the Institution of mechanical engineers. Part B, journal of engineering manufacture, ISSN 0954-4054, E-ISSN 2041-2975, Vol. 222, no 11, p. 1475-1487Article in journal (Refereed)
    Abstract [en]

    Surface roughness plays an important role in the control of emissions and friction losses in the cylinder liner–piston ring system as well as securing economically favourable manufacturing. A number of different commercial cylinder liner types have been characterized using traditional two-dimensional stylus and ISO parameters together with the latest three-dimensional characterization. The results highlight the weak and strong correlations between different families of parameters traditionally used for liner surface specifications. The bearing curve based Rxq and Rk parameter families have been evaluated and show systematic and consistent differences when characterizing the same surface features when trying to establish independent characterization of the highly stratified, two-process cylinder liner surfaces. No significant improvement in discrimination results from using ensemble averages. Presentation of correlations in the form of topological diagrams helps to show when parameters with a high intrinsic variability can be effectively replaced by other more robust parameters with which they have a high correlation. Plateau parameters are in general more highly correlated than valley parameters. Three-dimensional parameters show high internal correlations and also correlate highly with some corresponding two-dimensional parameters.

  • 186.
    Rosén, Bengt Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Garnier, Jérôme
    Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, Ecole Nationale d'Ingénieurs de Saint Etienne, 58 rue Jean Parot, 42000 St Etienne, France.
    Uncertainties and optimized sampling in surface roughness characterization2011In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 271, no 3-4, p. 610-615Article in journal (Refereed)
    Abstract [en]

    Usage of 3D roughness parameters measurements requires knowledge of uncertainty causes in order to design proper measurement procedures. Even on apparently homogeneous machined surfaces, large local variations in 3D roughness parameters have previously been reported. This paper introduces and tests a concept for optimized sampling based on local-, and global topography analysis, using measurements of the Sa parameter on a large machined component as a practical example. It is shown that more than 40 measurements of Sa may be needed to attain a stable value, but that choice of an appropriate sampling strategy may reduce this requirement considerably. The results point to a possible route to minimize required measurements and contribute to the development of the "best-practice" when using 3D surface structure metrology.

  • 187.
    Rosén, Bengt Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Wennerberg, Ann
    Department of Biomaterials, Institute for Surgical Science, SE-413 90 Göteborg, Sweden.
    Rosén, Stefan
    Toponova AB, TeknoCenter 1, Pilefeltsgatan 73, SE-302 50 Halmstad, Sweden.
    Topographical characterisation of artificial femoral heads: a Benchmarking study2004In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 257, no 12, p. 1275-1280Article in journal (Refereed)
    Abstract [en]

    The main functional demands on artificial joints are that they last more than 20 years. This means optimising the friction coefficient to minimise forces transmitted to the surrounding bone and the wear of the contacting surfaces. Surface roughness has an important influence on friction and wear. Traditionally, the 2D Ra-parameter has been the preferred way to characterise the joint's topography. Today ongoing development of 3D techniques are available for the research, and the aim of the present paper is to highlight the importance and possibilities using high-resolution 3D atomic force microscope ( AFM) and the optical phase-shifting interferometer for texture characterisation of eight commercially available femoral heads. The results show a significant variation of topography and surface-lay for the different femoral heads in the study. The variation and difference between heads were further underlined by the use of different characterisation techniques and measuring strategy. Results highlight the importance of the selection of measurement strategy, parameters, instrumentation, and scale of measurement in order properly to characterise the femoral heads in this study.

  • 188.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Towards optimal sampling of surface roughness2008In: Proceedings / XII. International Colloquium on Surfaces January 28th and 29th, 2008, Chemnitz, Germany = XII. Internationales Oberflächenkolloquium / [ed] Michael Dietzsch, Aachen: Shaker Verlag, 2008, p. 383-392Conference paper (Refereed)
  • 189.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Berglund, Johan
    Chalmers, Göteborg, Sverige.
    Liljengren, Magnus
    Chalmers, Göteborg, Sverige.
    Machine Hammer Peening: A Substitute for Polishing of Pressing Die Surfaces?2009In: Proceedings of the 3rd Swedish Production Symposium, 2009, p. 184-189Conference paper (Refereed)
    Abstract [en]

    Machine hammer peening (MHP) is a new method for finishing of surfaces. With this method, the workpiecesurface is hammered with a spherical carbide tool. The mainobjective of the study was to evaluate whether the MHPmethod could become a plausible substitute for manualpolishing in pressing die manufacturing where nodular castiron is a common workpiece material. To do this, samplenodular cast iron surfaces were hammered and evaluated. Changes to the surfaces were evaluated using surfaceroughness measurements, hardness measurements and opticalimages. First of all, the workpiece surface was smoothened. Secondly, the surface hardness was increased significantly. Thirdly, the nodules on the workpiece surface wereaffected. They appeared to be smaller and not as visible. This effect would likely create a die surface less prone to gallingsince the cavities would not be filled with sheet metal to thesame extent in a forming operation. In addition, withMHP, theamount of polishing needed to manufacture a die surface canbe reduced because of the smoothening effect.

  • 190.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Blunt, Liam A.
    Centre for Precision Technologies, University of Huddersfield, United Kingdom.
    Thomas, Tom R.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    On in-vivo skin topography metrology and replication techniques2005In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 13, no 1, p. 325-329Article in journal (Refereed)
    Abstract [en]

    Human skin metrology is an area of growing interest for many disciplines both in research and for commercial purposes. Changes in the skin topography are an early stage diagnosis tool not only for diseases but also give indication of the response to medical and cosmetic treatment. This paper focuses on the evaluation of in vivo and in vitro methodologies for accurate measurements of skin and outlines the quantitative characterisation of the skin topography. The study shows the applicability of in-vivo skin topography characterisation and also the advantages and limitations compared to conventional replication techniques. Finally, aspects of stripe projection methodology and 3D characterisation are discussed as a background to the proposed methodology in this paper.

  • 191.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Bååth, Lars
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Dimkovski, Zlate
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    On Variation of Surface Topography and Robust Product Performance2012Conference paper (Refereed)
    Abstract [en]

    The customer’s demands for higher quality, faster delivery times and reduction of cost, give evidence for the need to develop new technologies or enhance existing technologies combined with research activities.

    The automotive industry's capability to develop new products in a shorter time is constantly improved.  Tool and die creation is a major part of the product creation for many industrial products and in particular for the automotive industry.  The higher product requirements on reduced weight, better safety, and lower emissions have meant that a larger number of automotive body parts must be made in advanced high strength steels.

    Improved functionality of surface textures and engineered tailor made component surfaces is one enabling technology for industry to increase compete ability by improved component function and reduced friction losses.

    However, material properties’ variation, un-evenly spread wear, unknown manufacturing process variations, the ”human factor”, faulty metrology procedures …   All factors interact to increase the problems of utilizing surface texturing on the micro metre level as a competitive tool for industry.

    Large variation of the micro topography created by industrial machining processes tends to reduce the impact of the usage of improved engineered surfaces on critical components.

    A proposal of a strategy for metrology using "intelligent" sampling techniques comprising of regionalization of the functional area and designed sampling patterns is presented.

    To efficiently make use of efficient sampling, an example of a recently developed optical scattering light in-line metrology of high precision surfaces is discussed as a tool to enable efficient control of machine tools in general.

    Future steps discussed include developing of control loops for implementation in CNC controllers to efficiently make use of the "smart" surface texture characterisation data from the developed in-line surface texture sensors.

  • 192.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Dimkovski, Zlate
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Cabanettes, Frédéric
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Löfgren, Hans
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Controlling variation of topography towards robust surface performance2010In: Proceedings of the 2nd International Conference on Surface Metrology: October 25-27, 2010, Worcester Polytechnic Institute, Worcester, MA, USA / [ed] Bergstrom T. et al., Worcester, USA: Worcester Polytechnic Institute , 2010, p. 43-51Conference paper (Refereed)
  • 193.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. Chalmers University of Technology, Gothenburg, Sweden .
    Fall, Andreas
    SCA Hygiene Products AB, Göteborg, Sweden.
    Rosén, Stefan
    Toponova AB, Halmstad, Sweden.
    Farbrot, Anne
    SCA Hygiene Products AB, Gothenburg, Sweden.
    Bergström, P.
    SCA Hygiene Products AB, Gothenburg, Sweden.
    Topographic modelling of haptic properties of tissue products2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 483, article id 012010Article in journal (Refereed)
    Abstract [en]

    The way a product or material feels when touched, haptics, has been shown to be a property that plays an important role when consumers determine the quality of products For tissue products in constant touch with the skin, softness" becomes a primary quality parameter. In the present work, the relationship between topography and the feeling of the surface has been investigated for commercial tissues with varying degree of texture from the low textured crepe tissue to the highly textured embossed- and air-dried tissue products. A trained sensory panel at was used to grade perceived haptic "roughness".

    The technique used to characterize the topography was Digital light projection (DLP) technique, By the use of multivariate statistics, strong correlations between perceived roughness and topography were found with predictability of above 90 percent even though highly textured products were included. Characterization was made using areal ISO 25178-2 topography parameters in combination with non-contacting topography measurement. The best prediction ability was obtained when combining haptic properties with the topography parameters auto-correlation length (Sal), peak material volume (Vmp), core roughness depth (Sk) and the maximum height of the surface (Sz). © Published under licence by IOP Publishing Ltd.

  • 194.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Nilsson, Bertil
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Thomas, Tom R.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Wiklund, Daniel
    Chalmers University of Technology, Gothenburg, Sweden.
    Xiao, Li
    Chalmers University of Technology, Gothenburg, Sweden.
    Oil pockets and surface topography: Mechanisms of friction reduction2004Conference paper (Other academic)
    Abstract [en]

    Oil pockets reduce friction in two ways: by providing lift themselves by a cavitation mechanism, and also by acting as a reservoir of lubricant which will leak out around their boundaries to minimise direct metallic contact in the surrounding region. The relative importance of these mechanisms is estimated in particular tribological environments. The general cavitation conditions for oil pockets are defined and the cavitation models of Etsion and Kato are compared. Both these models require knowledge of the size and distribution of oil pockets, and an attempt is made to relate these to measurable surface topography parameters. Mechanisms for leakage of lubricant from oil pockets are also discussed. Advantages and disadvantages of the Wihiborg-Crafoord index are presented. The effect of oil pockets on the contact regime in gears is assessed, and in particular the likely effect of oil-pocket-induced cavitation on gear noise, and its relation to existing work on gear roughness, is discussed. Problems of oil pocket measurement on reaÌ surfaces are outlined and the advantages of 3D measurement are identified.

  • 195.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Thomas, T.R.
    Proceedings of the 9th International Conference on Metrology and Properties of Engineering Surfaces2003Conference proceedings (editor) (Other (popular science, discussion, etc.))
  • 196.
    Rosén, Bengt-Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Wennerberg, Ann
    Malmö Högskola, Odontologiska fakulteten.
    Jimbo, Ryo
    Malmö Högskola, Odontologiska fakulteten.
    Fractal (scale sensitive) characterisation of dental implant morfology2012Conference paper (Other academic)
  • 197.
    Rosén, Stefan
    et al.
    Toponova AB, Halmstad, Sweden.
    Thomas, Tom
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. Manufacturing Technology Research Group, Department of Materials and Manufacturing Technology, Chalmers University, Göteborg, Sweden.
    The Stedman diagram revisited2014In: Surface Topography : Metrology and Properties, ISSN 2051-672X, Vol. 2, no 1, article id 014005Article in journal (Refereed)
    Abstract [en]

    The Stedman diagram has been used for some years to display aspects of the performance of instruments measuring surface roughness. Such diagrams are herein employed to compare the features of a range of proprietary measuring instruments, including contact and non-contact devices. An extension of the basic diagram is proposed, which would allow it to include a further aspect: the speed of data collection. Figures of merit based on the revised diagram are computed, which enable instruments to be ranked on these particular aspects of their performance. Contact instruments emerge as comparable to non-contact, as their slower rate of data acquisition can be offset by the greater area they can access in amplitude–wavelength space. © 2014 IOP Publishing Ltd.

  • 198.
    Rosén, Stefan
    et al.
    Toponova AB, Halmstad, Sweden.
    Thomas, Tom
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. Chalmers University, Göteborg, Sweden.
    The Stedman diagram revisited2013In: Metrology and Properties of Engineering Surfaces, 2013: Proceedings of the 14th International Conference, Taipei, Taiwan, June 17-21, 2013, 2013, p. 201-206Conference paper (Refereed)
    Abstract [en]

    The Stedman diagram has been used for some years to display aspects of the performance of surface roughness measuring instruments. Such diagrams are herein employed to compare the features of a range of proprietary measuring instruments, including contact and non-contact devices. An extension of the basic diagram is proposed which would allow it to include a further aspect, speed of data collection. Figures of merit based on the revised diagram are computed which enable instruments to be ranked on these particular aspects of their performance. Contact instruments emerge as comparable to non-contact, as their slower rate of data acquisition can be offset by the greater area they can access in amplitude-wavelength space.

  • 199.
    Rögnvaldsson, Thorsteinn
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Brink, Joachim
    Halmstad University.
    Florén, Henrik
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Gaspes, Veronica
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Holmgren, Noél
    University of Skövde, Skövde, Sweden.
    Lutz, Mareike
    Halmstad University.
    Nilsson, Pernilla
    Halmstad University, School of Education, Humanities and Social Science, Research on Education and Learning within the Department of Teacher Education (FULL).
    Olsfelt, Jonas
    Halmstad University.
    Svensson, Bertil
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Ericsson, Claes
    Halmstad University, School of Education, Humanities and Social Science, Research on Education and Learning within the Department of Teacher Education (FULL).
    Gustafsson, Linnea
    Halmstad University, School of Education, Humanities and Social Science, Contexts and Cultural Boundaries (KK).
    Hoveskog, Maya
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Hylander, Jonny
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Jonsson, Magnus
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Nygren, Jens
    Halmstad University, School of Health and Welfare, Centre of Research on Welfare, Health and Sport (CVHI).
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Sandberg, Mikael
    Halmstad University, School of Education, Humanities and Social Science, Center for Social Analysis (CESAM).
    Benner, Mats
    Lund University, Lund, Sweden.
    Berg, Martin
    Halmstad University, School of Education, Humanities and Social Science, Center for Social Analysis (CESAM).
    Bergvall, Patrik
    Halmstad University.
    Carlborg, Anna
    Halmstad University.
    Fleischer, Siegfried
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Hållander, Magnus
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Mattsson, Marie
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Olsson, Charlotte
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Pettersson, Håkan
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Rundquist, Jonas
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Sahlén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Waara, Sylvia
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Weisner, Stefan
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    ARC13 – Assessment of Research and Coproduction: Reports from the assessment of all research at Halmstad University 20132014Report (Other (popular science, discussion, etc.))
    Abstract [en]

    During 2013, an evaluation of all the research conducted at Halmstad University was carried out. The purpose was to assess the quality of the research, coproduction, and collaboration in research, as well as the impact of the research. The evaluation was dubbed the Assessment of Research and Coproduction 2013, or ARC13. (Extract from Executive Summary)

  • 200.
    Safaei, Rickard
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Höjdjusterbart armstöd för bildörrpanel2015Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    The following report is based on the final thesis within the CAD-technicianprogram at Halmstad University. The work includes the development of a heightadjustable armrest for the driver, a product that’s not available on the market yet.The execution of the work has involved a criterion lineup with demands andrequirements, development of product proposals in the shape of sketches and 3Dmodels, choice of materials through studies, prototypes were produced for producttesting. Some attention has been given to carry out market research to see if thereis an interest in the product.

12345 151 - 200 of 241
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