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  • 101.
    Elghoul, zoelfikar
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    John, Shobin
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Surface Topographical  Analysis Of Cutting Inserts2016Independent thesis Advanced level (degree of Master (One Year)), 40 credits / 60 HE creditsStudent thesis
    Abstract [en]

    The following report conducted with collaboration of the University of Halmstad and ABSandvik Coromant.The focus of the project is characterizing the surface topography of different surface treatmentvariants before and after chemical vapor deposition (CVD).As a part of improving the knowledge about the surface area characterization and accomplisha better knowledge and understanding about surfaces and its relation to wear of uncoatedWC/Co cutting tools The project initiated in February 2016 and end date was set to May2016.The methodology used in this thesis based on the statistical analysis of surface topographicalmeasurements obtained from interferometer and SEM by using Digital-Surf-MountainsMapsoftware.The finding from this thesis showed that Mean and Standard deviation method, Spearman’scorrelation analysis and Standard deviation error bar followed by ANOVA and T-test areeffective and useful when comparing between different variants.The thesis resulted in a measurement approach for characterizing different surfacetopographies using interferometer and SEM together with statistical analysis.Keywords: 3D-Surfaces Texture, CVD coating inserts, Interferometer, Spearman’s correlation andANOVA & T-test.

  • 102.
    Eriksson, Martin
    et al.
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    Petersson, Håkan
    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.
    A process model for enhanced integration between computer-based design analysis and engineering design2016Manuscript (preprint) (Other academic)
    Abstract [en]

    The findings from a survey in industry and from an extensive literature survey revealed the need for the development of an integrated process model for computer-based design analysis (CBDA) facilitating the interactions in the engineering design process in mechanical engineering on an operational level. CBDA is here confined to the utilization of advanced computational methods and tools from computer aided engineering (CAE), such as computational structural mechanics (CSM), computational fluid dynamics (CFD) and multi-body systems (MBS). In order to facilitate integration to the multitude of engineering design process models in industrial practice, including overall processes such as product innovation and product development, the process model needs to be adaptive and generic. Generic should here be interpreted as not being dependent on any specific type of product, engineering design process, or on any specific type of product innovation and/or product development process models utilized by an enterprise. Resulting from synthesis processes based on the findings from surveys and experiences gained from design analysis projects in industrial practice, the generic design analysis process (GDA) model was developed. The application of the GDA process model is exemplified by four examples, which have been utilized for validation of the process model.

  • 103.
    Fhager, Andreas
    et al.
    Chalmers University of Technology, Department of Electromagnetics, Göteborg, Sweden.
    Hashemzadeh, Parham
    Chalmers University of Technology, Department of Electromagnetics, Göteborg, Sweden.
    Bååth, Lars B.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Persson, Mikael
    Chalmers University of Technology, Department of Electromagnetics, Göteborg, Sweden.
    Microwave Imaging for Mammography using an Iterative Time-Domain Reconstruction Algorithm; Initial Experiments2005In: Proceedings of the 16th International Zurich Symposium on Electromagnetic Compatibility; Topical Meetings, Zürich: Laboratory for Electromagnetic Fields and Microwave Electronics, Swiss Federal Institute of Technology , 2005, p. 65-70Conference paper (Other academic)
    Abstract [en]

    Using the microwave imaging technique for mammographic imaging is an interesting application and a growing research field. Compared to X-ray mammography there is potentially a significant benefit in using microwaves in the diagnosis of breast cancer tumours due to the high contrast in the dielectric properties between tumour and surrounding tissue.In this paper a tomographic microwave imaging ex- periment using transient time domain field data for the reconstruction process. A 2D iterative gradient based al- gorithm based on the FDTD-method (Finite Difference Time Domain-method), is used for the image reconstruction. The reconstructions have been performed using air as the background medium. To simulate more tissue like conditions the antennas have also been immersed in water and different objects immersed in the water have been imaged. Two different antenna models in the computations have also been tested. The results are promising and encourages further research on this method

  • 104.
    Flys, Olena
    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.
    Olsson, Bengt
    Volvo Group Truck Technology, Gothenburg, Sweden.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Bååth, Lars
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Piston ring topography variation and robust characterization2014Conference paper (Refereed)
    Abstract [en]

    It is a constant challenge for the automotive industry to reduce friction losses and oil consumption in automobile engine. The piston ring friction accounts for approximately 20% of the total mechanical energy losses in a modern engine. Oil control rings limit and control the oil consumption of the engine as well. They scrape off excess lubricating oil from the cylinder walls and return it to the crank case. Piston rings are designed to distribute the thin oil film evenly to ensure piston and ring lubrication. The surface topography of a piston ring is an efficient variable in the control of the oil consumption and friction losses. In places where the interacting surfaces come in contact, the oil film thickness is extremely thin and the surface asperities may deform because of the high pressures. There are different types of oil control rings.The most common one is the twin land oil control ring, which consists of two narrow lands that scrape off the oil on the liner and a spring on the back that exerts the load. In this paper, the surfaces of the two lands were investigated, since they play the key role in its function. The goal is to map the variation in surface roughness of piston rings that appear at different scales from form and waviness to micro and nano roughness. Areal topography measurements were made by white light interferometer designed at the Halmstad University able to measure and scan the total functional area of a piston ring. An significant amount of oil control piston rings of heavy duty truck engines were examined and 24 measurements were made in circumferential direction and on each ring land. The results show both the variation and uncertainty of the ring topography and discuss the instrument and measuring methodology uncertainty. The most stable parameters were found and recommended for an effective quality control. Comparisons between established coherence scanning interferometer and the instrument built in Halmstad were made. To ensure a good quality, the measurements were made both on calibration standards and on piston ring surfaces. Finally the influence on function and energy losses in the final engine assembly is discussed to indicate future design and metrology improvements.  

  • 105.
    Flys, Olena
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK). SP Technical Research Institute of Sweden, Borås, Sweden.
    Källberg, S.
    SP Technical Research Institute of Sweden, Borås, Sweden.
    Ged, G.
    LCM LNE-Cnam, Trappes, France.
    Silvestri, Z.
    LCM LNE-Cnam, Trappes, France.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Characterization of surface topography of a newly developed metrological gloss scale2015In: Surface Topography: Metrology and Properties, ISSN 2051-672X, Vol. 3, no 4, article id 045001Article in journal (Refereed)
    Abstract [en]

    In the European Joint Research Project 'Multidimensional Reflectometry for Industry', a new gloss scale was developed with the aim to represent different levels of gloss, hue, roughness, and refractive indices. In this paper, the surfaces of six selected samples were thoroughly investigated using various measuring techniques in order to verify the outcome of the novel manufacturing processes in terms of distinct levels as well as types of surface roughness. The aim of the evaluation was to capture surface structures in different wavelength intervals utilizing a confocal microscope, a coherence scanning interferometer, and an atomic force microscope. Power spectral density functions were also calculated from the measurements and used to determine suitability of techniques for different roughness scales. The measurements show that the expected surface characteristics as well as different RMS roughness values are intimately connected to the perceived glossiness.

  • 106.
    Glon, Fanny
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. ENISE, Saint-Etienne, France.
    Flys, Olena
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. SP Technical Research Institute of Sweden, Borås, Sweden .
    Lööf, Pär-Johan
    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.
    3D SEM for surface topography quantification – a case study on dental surfaces2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 483, no 1, article id 012026Article in journal (Refereed)
    Abstract [en]

    3D analysis of surface topography is becoming a more used tool for industry and research. New ISO standards are being launched to assist in quantifying engineering surfaces. The traditional optical measuring instrumentation used for 3D surface characterization has been optical interferometers and confocal based instrumentation. However, the resolution here is limited in the lateral dimension to the wavelength of visible light to about 500 nm. The great advantage using the SEM for topography measurements is the high flexibility to zoom from low magnifications and locating interesting areas to high magnification of down to nanometer large surface features within seconds. This paper presents surface characterization of dental implant micro topography. 3D topography data was created from SEM images using commercial photogrammetric software. A coherence scanning interferometer was used for reference measurements to compare with the 3D SEM measurements on relocated areas. As a result of this study, measurements emphasizes that the correlation between the accepted CSI measurements and the new technology represented by photogrammetry based on SEM images for many areal characterization parameters are around or less than 20%. The importance of selecting sampling and parameter sensitivity to varying sampling is high-lighted. Future work includes a broader study of limitations of the photogrammetry technique on certified micro-geometries and more application surfaces at different scales. © Published under licence by IOP Publishing Ltd.

  • 107.
    Gregorovic, Antonia
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Anikina, Elizaveta
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Konstruktion av lapputmatningsmaskin2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The vision of this thesis was to create a concept that can be used as a base for amachine construction. The purpose of this project was to use different methods todevelop a concept that on the best way meets the sat up requirements. This projecthas been divided into three stages/parts; principle, primary and the final solutionstage.This thesis has been conducted in collaboration with Västkustägg AB. It is aconstruction project designed to construct a machine that will automatically putlabels on the egg packages. Västkust AB wanted to automate this process. Thecompany has only tested this process earlier by an operator who did this jobmanually.We came up with different solution during this project. The assessments of theseconcepts were made after Olsson's (1995) method and together with Terje Olsson- our supervisor at the company, later during the project. During the last stage ofthis project we chose to go with one final concept for a further developing. Alldemands made by the company were followed throughout the working process.We managed to develop a machine containing few and simple components, whichat the same time are very functional for its purpose. The design of our machine isdifferent from other industrial machines and labeling machines which makes itunique in its own way. This machine is meant for labels of two standard types ofpaper A5 and A6.The calculations we made during this project have been done in Catia V5 and hasbeen verified. We had a clear image of how our ideas should be in the beginningof this project and we knew how we wanted them to be we used our own theoriesand approaches in practice. Our theories and ideas showed in our sketches andprototypes. This along with other methods led to our final concept.We had also built some prototypes to be able to see if our ideas work in practice.The prototype led to some changes in our concepts. It gave us experience inprototype creating, functionality of the ideas and other areas.

  • 108.
    Hansson, Torbjörn
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Luckmann, Christian
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Nyutveckling av sjunkspärr2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    We got in contact with Marco AB, who we’ve had contact with before concerning earlier projects, to find out if they were interested in arranging a larger project for our last class (Examensarbete 15hp). They were very positive to this proposition, and soon they offered us a project regarding reconstruction of their current mechanical device that absorbs all the force from the lift itself when it is at a predefined level (sv. sjunkspärr). The current solution does fulfill the requirements that are given, however it is not a solution that gives a high level of satisfactory. It is complicated, both to manufacture and assemble, it is not recyclable due to the hydraulic system and in addition it has retardation issues. But most of all, it is expensive. That may raise the question; how come Marco is still using the current solution? The device is an accessory for the lift tables that Marco produces and sells, not a standard solution. They produce about 100-150 of them every year, and therefore is a small part of their total income. This in addition to the solution being bought from a consultant, they merely tested the product and then added it to the assortment. The project ended up in a solution none of us could have foreseen, neither by function nor visualization.

  • 109.
    Hashemzadeh, Parham
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Fotonik.
    Parametric Reconstruction of Objects Using Microwave Measurements2009Doctoral thesis, comprehensive summary (Other academic)
  • 110.
    Hashemzadeh, Parham
    et al.
    Department of Electromagnetics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden.
    Fhager, Andreas
    Department of Electromagnetics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden.
    Kopecky, Rudolf
    Department of Electromagnetics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden.
    Bååth, Lars B.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Persson, Mikael
    Department of Electromagnetics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden.
    Imaging of metal prostheses in the human body: experiments and simulations2005In: Proc. RVK 05, Radiovetenskap och kommunikation, Linköping, Sweden, June 14-16 2005, Svenska Nationalkommittén för radiovetenskap (SNRV) , 2005, p. 67-70Conference paper (Other academic)
    Abstract [en]

    In this paper with present the experimental results of imaging a 12mm copper rod immersed in water with a relative permittivity of ε = 78 , σ = 0.2. A copper rod is a simpler object to analyze for these first series of investigations than a hip prostesis. One should note that it has a relative permeability μ = μ0. The prosteses is also manufactured using titanium and it posseses a similiar permeability to that of copper. The setup used is very similiar to that proposed for the detection of breast cancer tumors [1],[2].The metalic rod is immeresed in water and is surrounded by an array of transceivers. The multi static data matrix is recorded as a function of frequency on the boundary of the medium under test. The multi static data matrix is a square complex symmetrix matrix. The elements consist of the received relative amplitude and phase between each sensor element as a function of frequency. A vector network analyzer and a switching matrix is used as the transceiver module. The mulitstatic data matrix is fourier transformed to time domain in order to be used in the FDTD based algorithm. The imaging algorithm used is similiar but a modified version to that proposed by Tanaka, Takenaka, He[3] and Gustafsson,He [4].The results of these first attempts to image metalic object are very promising and one can potentially use the proposed setup in various fields of medical imaging.

  • 111.
    Hashemzadeh, Parham
    et al.
    Department of Electromagnetics, Chalmers University of Technology, Göteborg, Sweden.
    Fhager, Andreas
    Department of Electromagnetics, Chalmers University of Technology, Göteborg, Sweden.
    Kopecky, Rudolf
    Department of Electromagnetics, Chalmers University of Technology, Göteborg, Sweden.
    Bååth, Lars
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Persson, Mikael
    Department of Electromagnetics, Chalmers University of Technology, Göteborg, Sweden.
    Experimental Results of an Optimization Approach to Two Dimensional Time Domain Electromagnetic Inverse Problem With Application to Microwave Breast Tomography2005In: Proceedings of the third IASTED International Conference on Biomedical Engineering: February 16-18, 2005, Innsbruck, Austria / [ed] K.-P. Adlassnig, M. Bracale, Anaheim, CA: ACTA Press, 2005, p. 192-196Conference paper (Refereed)
    Abstract [en]

    Microwave Imaging is an interesting tool and a growing research field in a number of applications. Compared to X--ray mammography there is potentially a significant benefit in using microwaves in the diagnosis of breast cancer tumors due to the high contrast in the dielectric properties between tumor and surrounding tissue. This paper is based on the first series of experimental results of a 2D iterative gradient algorithm based on the FDTD method (Finite Difference Time Domain method), which can be applied to microwave breast cancer imaging and possibly hip prosthesis dislocation.

  • 112.
    Hosseini Vafa, Babak
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    IMPLEMENTATION OF   ”MATRIX DATA CODE’’ MARKING ON GEAR KITS: Marking and reading of the marked data on the pinion and crown wheel after hardening and phosphating processes2015Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis has been performed in cooperation with the companyMeritorHVSABin order to implement amatrix data codes marked on gear kits for reducing potentialhuman errorwhen inputtingthe information inside thecompany's business system. Asustainablemarkingis the basis forproducttraceability to followa product'swayfrom theraw materialto finished product so that they can betracedthroughouttheir life cycle. To investigate thecurrent technology, two different marking andreadingmethods were tested: a laser and dot peen method. It has been found that the dot peen method was more suitable for Meritorto mark thewheel because the markswere clearerand couldbe readbothwith the naked eyeand scanner. Conversely, the contrast of the mark created by the laser method was not as readable as the dotted marks and there has been a larger risk to be mechanically removed because of its thin thickness.As a result, the matrix data code made by dot peen method has been fully implemented on the pinion’sandcrown wheel’s production in Meritor.

  • 113.
    Hugoh, Jakob
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Hentz, Jacob
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Upprullningsmaskin till National Gummi2015Independent thesis Basic level (university diploma), 180 HE creditsStudent thesis
  • 114.
    Hung, Candy
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    CAD- och beräkningsunderlag för optimering av luftintag2011Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    The following thesis is executed in collaboration with m4soultions AB, Halmstad, and Volvo Buses AB, Gothenburg.

    Volvo Buses wishes to lower the production cost of their air intake grills. To achieve this an instruction have been created to provide the upcoming work to optimize the air intake grill with information and guidance.

    This project, which is done in collaboration with the bachelor thesis Instruction for optimization of air intake grill by Hung & Bodin (2011), provides this instruction with CAD and computational support.

     

    The achieved result includes plans and analysis of fluid simulations done for the two types of air intake grills that are used by Volvo today. Based on this analysis a proposal for improvements is presented for upcoming fluid simulations.

     

    To simplify the process of creating CAD-models for air intake grills a CAD-support was created in the program Catia V5. In this the user can by preforming a serial of simple steps create an air intake grill. These models can later on be used for different computer aided computations.

  • 115.
    Hung, Candy
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Bodin, Victoria
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Instruktion för optimering av luftintag2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The following thesis is executed in collaboration with m4soultions AB, Halmstad, and Volvo Buses AB, Gothenburg.

    Volvo wishes to lower the production costs of their air intake grills, without compromising with the performance of the grill. To ensure the success of this work there is a need to investigate how well the current air intake grills perform, identify areas that are in need for improvement and develop plans for the optimization work.

     

    This thesis has investigated the need of information and competence required to optimize the air intake grill. The result consists of an instruction containing all available information for the grill and suggests suitable methods and tools, and is meant to aid Volvo in their future work to optimize the air intake grill.

     

    Volvo AB is a part of the vehicle industry, due to that it is suitable to mould the instruction according to the standard ISO/TS 16949:2009, for product development in the vehicle industry, and Volvo’s own methodology, Global Development Process, used for product development.

     

    The study made for the air intake grill includes fluid simulations, a market research and a technical specification, together with analysis and evaluations of all available information. All this gave an overall picture of the air intake grills performance; this in turn indicated which activities that are necessary to include in the final instruction.

  • 116.
    Johansson, Jimmy
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Johnsson, Martin
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Product development of medicine cups for AB Sundplast2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose

    The purpose with this thesis is to gain deeper knowledge within product development chain and apply the skills that has been mastered during the education.

    Method

    The project provides answers to the study questions by addressing the gathered empirical data and theoretical framework .

    Implications

    Most time was to read and understand the ISO documents, to implement them on the right things and distinguish if they had an impact on our work.

    A lot of restrictions in this area because of the high risk of products within the medicine technical area.

    Limitations

    Rather soon during the project it was revealed that it was quite large and had to be limited within a certain region to make a good job. The whole process from idea to finished production line would take up to much work and will not be possible.

    The work will be limited within the area of getting the product CE-marked for production.

  • 117.
    Johansson, S.
    et al.
    Volvo Technology AB, Chalmers Science Park, Gothenburg.
    Frennfelt, C.
    Volvo Technology AB, Chalmers Science Park, Gothenburg.
    Killinger, A.
    Universität Stuttgart, Institut für Fertigungstechnologie keramischer Bauteile (IFKB), Stuttgart.
    Nilsson, P.H.
    Volvo Technology AB, Chalmers Science Park, Gothenburg.
    Ohlsson, R.
    Volvo Powertrain AB, Gothenburg.
    Rosén, Bengt - Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Frictional evaluation of thermally sprayed coatings applied on the cylinder liner of a heavy duty diesel engine: pilot tribometer analysis and full scale engine test2011In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 273, no 1, p. 82-92Article in journal (Refereed)
    Abstract [en]

    The piston system accounts for roughly half of the mechanical friction of an internal combustion engine, thus it is important to optimize. Different thermally sprayed cylinder liners were investigated in order to optimize the frictional impact of the contact between cylinder liner and piston ring/piston. A novel tribometer test setup was used to scan through different materials at different running conditions. Based on these results a full-scale single cylinder test was performed to validate the results from the rig. A comparison of the results between the tribometer and the engine shows the importance of the ratio between viscous and mechanical friction losses.

  • 118.
    Johansson, Staffan
    et al.
    Volvo Technology AB.
    Nilsson, Per H.
    Volvo Technology AB.
    Ohlsson, Robert
    Volvo Powertrain AB.
    Anderberg, Cecilia
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    New cylinder liner surfaces for low oil consumption2008In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 41, no 9-10, p. 854-859Article in journal (Refereed)
    Abstract [en]

    Anticipated emission legislation and reduced fuel consumption are the main driving forces when developing new engines. Optimization of the active surfaces in the piston system is one possible way to meet the above demands. In this study the effects of surface topography and texture direction of the ring/liner contact on oil film thickness and friction were simulated and experimentally tested. "Low wear" results from the experimental wear tests with "glide honed" smooth liner surfaces supported the "low friction" simulation results. In addition a new wear volume sensitive surface roughness parameter, Rktot, based on the Abbot-Firestone bearing area curve was introduced.

  • 119.
    Johansson, Staffan
    et al.
    Volvo Technology AB.
    Nilsson, Per
    Volvo Technology AB.
    Ohlsson, Robert
    Volvo Powertrain AB.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Experimental friction evaluation of cylinder liner/piston ring contact2011In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 271, no 3-4, p. 625-633Article in journal (Refereed)
    Abstract [en]

    Fuel consumption is an extremely important parameter for the automotive industry today. Anticipated emission legislative demands in combination with a rising oil price are true motivators. In engines the piston system is the largest source of frictional losses, accounting for about 50% of the total frictional losses, thus it is important to optimize. Apart from frictional losses the piston system is a large consumer of lubricating oil, a considerable contributor to the total amount of particulate emissions (PM). New materials, coatings and high-tech machining processes that previously were considered to be too expensive and therefore only used in complex applications are today becoming more affordable. It is important to develop reliable test methods to study these new concepts. The reciprocating tribometer at Volvo Technology has been updated to better evaluate the frictional difference between material combinations/surfaces; it is possible to evaluate a number of operational parameters in each experiment. The components that were studied were a piston ring running against a cylinder liner. Friction, wear and change in surface morphology were studied in the experiments. It is shown that for the introduced DoE based tribometer test the interaction of dynamic viscosity, velocity and contact pressure can be studied within one experiment. The results show differences in friction which could be explained as the surface creating beneficial contact conditions for oil film build-up. It is also apparent that surface roughness is important regardless of material properties. To better understand the correlations between friction and surface roughness a future study should include a study of similar materials with different roughness values.

  • 120.
    Johansson, Staffan
    et al.
    Volvo Technology AB.
    Nilsson, Per
    Volvo Technology AB.
    Ohlsson, Robert
    Volvo Powertrain AB.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Experimental friction evaluation of cylinder liner/piston ring contact: Results2009In: Proceedings of the 12th International Conference on Metrology and Properties of Engineering Surfaces / [ed] P. Pawlus, L. Blunt, B.-G. Rosen, T. Thomas, M. Wieczorowski, H. Zahouani, Rzeszow: Rzeszow University of Technology , 2009, p. 193-199Conference paper (Refereed)
  • 121.
    Jonsson, Dennis
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Urbaniak, Matteus
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Hantering och ompaketering till smålådor.2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is performed at the company National Gummi AB who is manufacturers of rubber

    products. This report describes the process of the product realization in combination with

    production development. The purpose with this thesis was to examine ways to streamline the

    packaging process, which currently takes place manually at the company. The aim is to

    reduce management costs for packaging by finding an efficient packaging solution and reduce

    the manual work at the packing.

    The project contains analysis of company present situation, functional analysis, list of criteria,

    weight of criteria, FMEA, principal sketches and a product compilation draft.

    In order to achieve the objectives of the project methods were used from books as

    Principkonstruktion, Premiärkonstruktion (Fredy Olsson) and Produktionsutveckling (Monica

    Bell Grad & Kristina Säfsten). The result consists of two different solutions that meet the

    demands and requirements but differ with different properties from each other. Theories and

    reasons behind the success of the project are available in the report. Finally the project and the

    two proposed solutions were evaluated.

  • 122.
    Jonsson, Per
    et al.
    Olofström School of Automotive Stamping, Olofström.
    Berglund, Johan
    Sandvik Tooling R & D Center Olofström.
    Kjellsson, Kenneth
    Department of Manufacturing Engineering, Die Development, Volvo Cars, Olofström.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Surface Topography on trimming dies and the influence of wear2010In: Proceedings of the International Deep Drawing Research Group / [ed] R. Kolleck, 2010, p. 345-354Conference paper (Refereed)
    Abstract [en]

    In this paper it is investigated how surface topography on trimming dies influences the wear process. Surfaces on both semi-industrial test dies and dies used in production were analyzed with different surface topography analysis methods. The result shows that the wear process is different on the different sides of the trimming edge. The texture direction of the surface is changed due to wear, with the strongest change on the clearance side of the edge. The roughness on sheet side of the edge is reduced due to a hammering effect from the sheet material. The result on the test dies and the production dies correlates well.

  • 123. Jonsson, Per
    et al.
    Kjellsson, Kenneth
    Stenberg, Niclas
    Wiklund, Daniel
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Laser hardened trimming tools: wear test and geometry evaluation2008In: Proceedings of the IDDRG 2008 Conference / [ed] Nader Asnafi, Olofström: Industriellt utvecklingscentrum i Olofström AB , 2008, p. 639-650Conference paper (Refereed)
    Abstract [en]

    The higher product requirements (reduced weight, increased safety, lower emissions…) have meant that a larger number of car body parts must be made in advanced high strength steels. With a reduced lifecycle of a car model from 7 to 5 years this leads to a need for reducing the manufacturing cost and lead time for the tool and die design and manufacturing. The main purpose of this investigation is to establish cost- and lead-time reducing guidelines for selection of tool concepts (choice of die materials, hardening methods and geometry) for different production volume scenarios with respect to sheet materials quality (MS-UHSS) and thickness, without increased die maintenance costs. In this study the cutting edge geometry has been evaluated in respect to the cutting edge radius and the angle of the upper tool. Experimental testing together with FE simulation has been used. Results show that an angle of 93° on the upper cutting edge initially can reduce the cutting work by 14%. Results also shows that by using a cutting edge radius of 80µm, the tool “wear in phase” can be more controlled. Wear test up to 150 000 strokes have been made to evaluate different tool concepts using laser hardened cast iron, cast steel and wrought steel as die material. Sheet material tested was 220RP, DP600, DP800, 700MC and DP1000, with a thickness of t=2mm. The result leads to recommendations for industrial verification. Results among other recommendations are: laser hardened EN-JS-2070 up to 500 000 parts against 220RP and Sleipner up to 1 500 000 parts against 1000DP.

  • 124.
    Jonsson, Robin
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Sunnerheim, Jon
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Mätstation för rullmotstånd i massiva gummihjul2013Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

            

    This is a report that describes the entire process of design of a measuring station for rolling resistance.

     

    The report is structured with elements of Fredy Olsson's method.

    The report also includes a brief presentation of HGF, the company that will manufacture the machine.

     

    Requirements and preferences are set up and used in a weighting of criteria by which product suggestions are based. These suggestions are used in the evaluation to produce a final draft product.

     

    Solutions to major functions are produced by criteria’s. Component selection for all components is performed, a CAD-based model is developed and an economic analysis is set up.

     

    FMEA analysis is set up.

     

    The report ends with a brief summary, critical review and suggestions for further work.

  • 125.
    Jönsson, Andreas
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Akhondi, Farshad
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Konstruktion av Gummistans2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 126.
    Jönsson, Anna
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Berglund, Magnus
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    ISO 9001:2015 implementation at a manufacturing company2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Martin Ivarsson, manager and part owner at Landeryd’s Mechanical Workshop (LMW), Landeryd, Sweden, initiated this project. This because of a new released ISO 9001 version that LMW has to implement before the 15th of September 2018 to remain certified. Since LMW is ISO 9001:2008 certified the project members only needed to identify the differences among the 2015 and 2008 version to see what LMW has to do to get certified.

    There are approximately 1.1 million ISO 9001 certificates issued worldwide. An ISO 9001 certification increase organizations ability to satisfy customer needs and customers can rely on that the products and services provided are of consistently good quality. ISO 9001 can also work as a tool to streamline the organization’s processes and make them more efficient. Since the ISO 9001 is reviewed every five year it helps organizations to keep current in an ever- changing world.

    Landeryd’s Mechanical Workshop has been ISO 9001 certified since 2002 and the “ISO- think” is deeply rooted within the company. LMW is a small owner-controlled company with only 18 employees.

    ISO 9001:2015 is applicable on different kinds of organizations in various scales. Comparing to previous versions of ISO 9001 the new version is more adaptable. This makes it more beneficial for the organizations but harder for the auditors that certifies. One major conclusion is that LMW will have more freedom of document handling with the new ISO version.

    This report highlights LMW’s status today in accordance to the new ISO 9001 version, and estimates how much effort that is needed for a successful revision. Readers of this report will benefit from the results, since much is applicable on all types of organizations or companies. 

  • 127.
    Jönsson, Pontus
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Theander, Martin
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Lagafors CPU: Chemical Production Unit2015Independent thesis Basic level (university diploma), 180 HE creditsStudent thesis
    Abstract [en]

    This dissertation is performed at the request of Lagafors AB who develops and manufactures stationery and mobile hygiene solutions for companies in the food- processing industry. The objective of this dissertation is to develop and construct a new, cost efficient cleaning station based on an innovative technology.

    The technique is based on serially connected dosing pumps which allow the customer to work with concentrated detergents. This leads to serious reduction in the clients use expenses. Two units have been developed with this technique, one that is stationary and one that is mobile.

    The dissertation has led to good results which resulted in the sale of the first stationary unit of the Lagafors CPU before the end of this dissertation. 

  • 128. Kaestner, Anders P.
    et al.
    Bååth, Lars B.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Microwave polarimetry based wood scanning2000In: Proceedings of the 12th International Symposium on Nondestructive Testing of Wood: University of Western Hungary, Sopron, 13-15 September 2000, Sopron: University of Western Hungary , 2000, p. 8-Conference paper (Other academic)
    Abstract [en]

    We describe a method to detect knots and faults in wood logs based on microwave measurements and the depolarising properties of wood. The depolarisation is an effect of the anisotropy in the dielectric properties of wood, which is caused by the fibre structure. The measurements are made in the frequency domain where a discrete reflec-tion spectrum is sampled. By transforming the frequency spectrum into the time domain the spatial distribution of the reflections appear. The wave is transmitted in a pure linear polarisation, tilted to 45° For each discrete frequency all available information is measured for the reflected wave and therefore it is possible to calculate the complex polarisation ratio and the state of polarisation which are the quantities containing the most visible information. The measurements are one dimensional and by combining measurements from different directions we create tomographic slice images of the inner structure of a log. Our measurements has showed the possibility to follow the extension of knots in a log using only a iso-surface visualisation. The used equipment is working at low intensity and is therefore virtually harm-less to human beings, furthermore it is portable and can be operated by one single person.

  • 129.
    Kaestner, Anders P.
    et al.
    Institute for Terrestrial Ecology, ETH Zurich, CH-8952 Schlieren, Switzerland.
    Bååth, Lars B.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Microwave polarimetry tomography of wood2005In: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 5, no 2, p. 209-215Article in journal (Refereed)
    Abstract [en]

    In this paper, we present a new microwave-based method to make images of fiber structure, e.g., to locate knots in wood. Evaluation of Maxwell's equations for an electromagnetic wave propagating in an anisotropic media (wood) shows that the polarization of the wave depends on the local fiber orientation in the sample. Experiments support the theoretical evaluation showing that knots can be followed in images of polarimetric parameters, reconstructed from multiple monostatic measurements. The equipment works at low intensity and is, therefore, virtually harmless to human beings; furthermore, it can be made portable and be operated by a single person.

  • 130.
    Kullberg, Lovisa
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Analysis and evaluation of the ergonomic simulation software IMMA2014Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is the final project for the author’s master’s studies at Halmstad University. It has been completed within a research project (CROMM) at the University of Skövde.

    The purpose of the thesis was to analyse and evaluate if the ergonomic simulation software IMMA can be used to support design and evaluation of vehicle design. Four thesis questions were addressed. The objectives were to obtain a demonstrator that shows what the IMMA software can be used for, and to receive initial design data for design of ergonomic car trunks.

    Semi-structured interviews have been held with people who work with vehicle ergonomics at Volvo Cars, Scania and AB Volvo, and needs were identified within the following fields:  position, motion, envelopes, integration, evaluation, visualisation and general needs. An analysis of the results and the IMMA software was performed. The conclusion was that IMMA supports the basic needs for design and evaluation of vehicle ergonomics and therefore needs further development, both modifications and new functions.

    A method from the HFES 300 Committee was used for evaluation of the trunks together with simulations in IMMA. The result showed a variation depending on where in the trunk the box is placed. The analyse lead to the conclusion that the results cannot be seen as fully repeatable or reliable. A new function is needed in order to make it possible to fully evaluate the result.

    The recommendations are to start with development of the sit-positioning and an evaluation module. Although, the development of how to make the tool more time-efficient, user-friendly, repeatable and reliable, must be taken into consideration in each development step.

  • 131.
    Landqvist, Peter
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Petersson, Filip
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Simulation driven design of optimized sheet metal bracket2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The ever increasing pressure on reducing emissions and improving energy efficiency is driving the development of the products at Scania. To be competitive in the market the company needs to deliver trucks with higher quality and lower fuel consumption in order to reduce transportation costs for the customer. One step in this is to develop vehicle components that are optimized primarily for strength but also towards weight and price. A significant portion of the truck's components are sheet metal brackets and these are often not prioritized in the product development. This thesis focuses on developing methods for the design of sheet metal brackets.

    Simulation driven design is a method for improving the components. Simulationdriven design implies that simulations are introduced early in the design process and the simulations determine the design of the component. The simulations may consist of FEM calculations such as natural frequency analysis and frequency response analysis. By iteratively work with simulation driven design the company can achieve shorter lead times and lower production costs as well as lighter and more robust components. Scania strives to make simulation driven design as the standardized approach for designers.

    This thesis has resulted in a guideline for designers who focus on the subject simulation driven design. The guideline includes most parts of the construction process and discloses methods and integrated tools in CATIA V5 that are necessary when developing sheet metal brackets with simulation driven design. For testing as well as getting an educational structure for the guideline, a sheetmetal bracket from a reality-based problem was constructed. By using the guideline an optimized sheet metal bracket, in terms of strength, weight and price,was obtained. The iteration process of the optimized sheet metal bracket is presented in the guideline.

  • 132.
    Liljengren, Magnus
    et al.
    IUC Olofström.
    Kjellsson, K.
    Volvo Car Corp..
    Wiklund, Daniel
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Guidelines for die materials, hardening method and surface coatings for forming high, extra high and ultra high strength steel sheets (HSS/EHSS/UHSS)2008In: Proceedings of the IDDRG 2008 Conference / [ed] Nader Asnafi, Olofström: Industriellt utvecklingscentrum i Olofström AB , 2008Conference paper (Refereed)
  • 133.
    Liljengren, Magnus
    et al.
    IUC Olofström.
    Kjellsson, K.
    Volvo Car Corp..
    Wiklund, Daniel
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Improved nodular iron for forming dies to obtain functional die surfaces2008In: Proceedings of the IDDRG 2008 Conference: Best in class stamping, 16-18 June 2008, Olofström, Sweden / [ed] Nader Asnafi, Olofström: Industriellt utvecklingscentrum i Olofström AB , 2008, p. 615-626Conference paper (Refereed)
    Abstract [en]

    During the past years, large efforts have been made, to analyze and evaluate the surface quality of dies manufactured in nodular iron (GGG70L). The variation of quality in respect of wear resistance hardenability and micro cracks are the main issues. It results in bad surface quality on the formed parts (scratches) which gives break down in the production and increases the maintenance (repolishing of tool surface). The spread in wear resistance depends on that the parameters for a functional working surface combined with and the lubrication is not clarified and thus not been able to be specifie . The main parameters for a functional working surface are among other things the amount of nodules (n), size, shape (style), how the exit side (in draw direction) of the nodule crater looks like. Different qualities in respect to size, amount and shape of the nodules in a nodular iron have been tested against uncoated sheet material (H300LA, t=1.5mm) in semi-industrial test equipment (OSAS U-bend). The surface conditions of the nodular iron are laser or induction surface hardened. The result in this investigation shows that nodular iron (GGG70L) with high nodule count and small nodule size in the working surface gives a significant improvement of the resistance to adhesive wear.

  • 134.
    Lindgren, Johannes
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Riabov, Dmitri
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Monteringslösning till dörrkarm2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Dooria Sweden AB is one of the main door- and doorframe manufacturers inSweden. They deliver door frames for indoor use for project oriented buildingsites, for these types of building sites the doorpost comes pre-assembled. DooriaAB wants to minimize transport to reduce impact on environment and thetransportation costs of pre-assembled doorframes, this thru simplifying themethod of assembly.The main purpose of this thesis has been to develop a prototype solution thatbrings the three parts of the doorframe together with the same properties regardingstability and tightness of joints as the current method of assembly. A profile ofdemands and wishes were created in collaboration with Mårten Dragstedt, DeputyDirector of Dooria Sverige ABBy following the chosen method the authors have been able to produce a fullyfunctional prototype that meet the demands that were put on the product. Catia V5R20 has been used as an aid during prototype construction and virtual tests. Theprototype consists of a fitting, which simplifies and secures the method ofassembly regarding correct alignment of mutual parts and tightness of joints.Involved personnel will be able to assemble the parts of the doorframe easilywithout the need of tighten the doorframe, this prototype solution will also reducedamage to the doorframe caused by abrasion.This thesis has resulted in a prototype solution designed for assemblingdoorframes, it consists of two different types of already made components, aconnection screw with an associated screw-nut, this prototype will further becalled Ikeabeslag. The authors have proven that this solution best meets the stateddemands.

  • 135.
    Löfgren, Hans Bertil
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    A solution to the hydrodynamic lubrication of a circular point contact sliding over a flat surface with cavitation2012In: Theoretical and Applied Mechanics Letters, ISSN 2095-0349, Vol. 2, no 3, article id 032004Article in journal (Refereed)
    Abstract [en]

    This letter presents an analytical solution to the hydrodynamic lubrication of a circular point contact sliding over a flat surface with cavitation. The solution is found by solving the Reynolds equation with Reynolds boundary condition for cavitation. The cavitation boundary is shown to be straight lines directed 108.4° against the sliding direction. The result is experimentally verified in the limit of large values of viscosity, sliding velocity and radius of a spherical ball. The solution raises questions about the coupling between cavitation and film rupture and can be used as an independent check on the validity of numerical solutions.

  • 136.
    Malmberg, Donald
    et al.
    MEFOS, Luleå, Sweden.
    Bååth, Lars B.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Slag level detection in EAFs using microwave technology1999In: Scandinavian journal of metallurgy, ISSN 0371-0459, E-ISSN 1600-0692, Vol. 28, no 6, p. 266-276Article in journal (Refereed)
    Abstract [en]

    Within the metallurgical industry as well as the underground mine industry, there is a need for on-line level detection in the different production processes and their material feeding systems. Microwave technology is a versatile, non-invasive measurement technique, which has a number of advantages compared with penetrating probes, laser and radar technology, and echo sound technique. In its extension, it could also be used for qualitative and quantitative analysis of waste gases due to the presence of specific molecules. This contribution describes the introduction of microwave technology in different metallurgical as well as underground mine production processes with the emphasis on EAF's.

  • 137.
    Marcus, Malmström
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    David, Moretti
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Konstruktion av elektrolytisk ozongenerator2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    The work has been carried out in cooperation with the company Zenit Design in Malmö. The project's goal was to restore, improve and produce an ozone generator. During the project, the authors sought relevant literature in databases, been in contact with US suppliers of fuel cell membranes, Asian suppliers for the processing of Teflon and Titanium parts in mechanical engineering and Swedish suppliers of various standard components. The authors had access to a temporary lab at Zenit and electron microscope at Halmstad University where material tests were performed. The authors have also had access to measurement equipment to measure amounts of ozone.

    During the work, the authors have mapped how an existing ozone generator works and then have their own development. Difficulties with the project have included lead times from suppliers and expensive prototypes that lead to authors only had one chance to succeed.

    The results from the prototype test showed that the self-made ozone generator is not generating ozone as it should due to the membranes, Zenit will further investigate these.

  • 138.
    Mattsson, Alexander
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Beräkningoptimering och konceptuell design avIndustriskydd2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    ABSTRACTAs the industry becomes more efficient all the time and the budgets narrower the demand forsafety equipment has also increased to minimize downtime and injuries. With the efficienciesgrowing in Swedish industry the supplier of this project has also seen an increased demand forsafety equipment. One product that has increased is their “Industryprotection” a productcreated to protect forklifts from colliding with walls in industry spaces.The purpose of this project is to generate a concept for a new design of the“Industryprotection”. It also involves creating a static FEM analysis of a collision between aforklift and the “Industryprotection”. The goal for the analysis is to create a steady modelwhich easily could be applied to different concepts. A study of the different calculationsmethods will also be executed.The project is split into two phases one conceptual phase and one calculation phase, the laststep of the project is to analyze the recommended concept versus the current one using theanalysis created.The work is limited to only go as far as a recommended concept is created, the dimensioning,final drawing, manufacturing preparation and validating is given to the supplier of the projectThe theory for this project is gathered from studying literature from market evaluation,computer aided calculation and design process. After theory for each phase of the project hasbeen gathered they have been modified to suit the phase. Also a large study of everyparameter in the FEM analysis has been executed to secure a stable model for the analysis.The output of the model became a simple and steady model which easily could be applied todifferent concepts. The study of different calculation methods of the model generated a fivetime increase of the amount of momentum the “Industryprotection” could endure.

  • 139.
    Millman, Stuart
    et al.
    British Steel plc Moorgate Rotherham, United Kingdom.
    Bååth, L.B.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Malmberg, Donald
    MEFOS, Foundation for Metallurgical Research, Luleå, Sweden.
    Radio-wave inferometry for BOS slag control2001Report (Refereed)
    Abstract [en]

    The aim of the project is to use radio-wave interferometry to determine the BOF slag and metal heights in both a quiescent and a blowing BOS convertor. The hydrodynamics of the slag/metal emulsion and 1, 2 and possibly 3D representations of slag and metal movements during the blowing phase will be made. Process factors such as vessel shape, lance movements, bath agitation, flux/ore additions and fume generation will be considered.

  • 140.
    Motte, Damien
    et al.
    Lund University, Lund, Sweden.
    Eriksson, Martin
    Lund University, Lund, Sweden.
    Petersson, Håkan
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Bjärnemo, Robert
    Lund University, Lund, Sweden.
    Integration of the computer-based design analysis activity in the engineering design process – A literature survey2014In: Tools and methods of competitive engineering: proceedings of the tenth International Symposium on Tools and Methods of Competitive Engineering - TMCE 2014, May 19-23, Budapest, Hungary, Vol. 2 / [ed] Imre Horváth & Zoltán Rusák, Delft: Delft University of Technology , 2014, p. 1181-1194Conference paper (Refereed)
    Abstract [en]

    Computer-based design analysis is nowadays a common activity in most development projects. Used for design evaluation, verification, validation, or as a support for design exploration, it fulfils an important support function for the engineering designer, thus making it essential to have an operationally efficient and effective integration between both the engineering design and design analysis activities in the overall development project. In this area, most works are focusing on software (mainly CAD/CAE) integration, but not on the integration between computer-based design analysis and engineering design at the process level or on the collaboration between the engineering designer and the design analyst. This paper presents a review of the literature on that specific topic, namely the integration of the computer-based design analysis activity in the engineering design process. Different research topics are identified and elaborated upon: integration in general process models; recommendations for the different analysis steps; analysis early in the engineering design process; integration of design analysis in the engineering designer's work; alternative usages of design analysis in the engineering design process; and others, such as recommending guidelines instead of process models, quality assurance aspects, education, and implementation issues. Some neglected aspects were also identified. Among others, there is a lack of research into the so-called technology development (development of design analysis procedures and guidelines), and a need for emphasis on uncertainties, both coupled with the design analysis activity.

  • 141.
    Motte, Damien
    et al.
    Faculty of Engineering LTH, Lund University, Lund, Sweden.
    Petersson, Håkan
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Eriksson, Martin
    Faculty of Engineering LTH, Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Faculty of Engineering LTH, Lund University, Lund, Sweden.
    Development of a computer-aided fixture design system for lightweight grippers in the automotive industry2016In: International Journal of Design Engineering, ISSN 1751-5874, Vol. 6, no 3, p. 237-261Article in journal (Refereed)
    Abstract [en]

    The need for dedicated fixtures for flexible manufacturing systems is increasing, as dedicated fixtures are lighter, more compact and, more accurate than flexible fixtures. The main challenges are that parts and processes are more and more complex, which requires designing novel or complex dedicated fixtures, and that, for one given flexible fixture to be replaced, several variants of such dedicated fixtures must be designed to hold a variety of individual parts, without imposing increased costs and delays. The systematic fixture design method and computer-aided design fixture system (CAFDS) developed and applied for the presented industrial case—novel design of lightweight (carbon fibre composite) robot grippers—is a possible approach to address these issues.

  • 142.
    MULLOTH SUDHAKARAN, SUDHILAL
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    JOHN, VIBI
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Simulation of Removal Functions for Abrasive Grinding Tool: Numerical Simulation Of Tool Influence Function2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A relatively large set of complex data can be described using a simple mathematical Prestonequation. However the parameter choices are an essential facet that determines the efficiencyof grinding. The depth and volume of removal contributes to a significant part of the grindingoperation that accounts for the manufacturing time. These interacting factors in the equationare studied to create, infer and compare the performance of three sets of grinding tools: padtool, brush tool and radial tool. The tools are generated using MATLAB and is provided as aninput for tool path generation. The geometry profiled by the tool influence function is generatedusing Preston equation and the analysis from the simulation shows that the pad tool can bepreferred in instances where maximum removal is required. The comparison amongst the toolswas made keeping the parameters (pressure and relative velocity) constant in the equation forthe different tools.

  • 143.
    Möllerström, Erik
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik. Division for Electricity, Department of Engineering Sciences, Uppsala University, Uppsala, Sweden.
    Bolin, Karl
    Marcus Wallenberg Laboratory, Department of Aeronautical and Vehicle Engineering, KTH Royal Institute of Technology, Stockholm, Sweden.
    Ottermo, Fredric
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Bååth, L.B.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Hylander, Jonny
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Noise directivity from a vertical axis wind turbine2015In: Proceedings of the 6th International Conference on Wind Turbine Noise 2015, New Brighton: INCE/Europe , 2015Conference paper (Other academic)
    Abstract [en]

    The directivity of wind turbine noise is of widespread interest and has received attention over an extended period. The reason for this is partly that noise optimization procedures can be implemented in order to increase the efficiency of the power output. Although directivity of horizontal axis wind turbines (HAWTs) are well understood, the directivity pattern around vertical axis wind turbines (VAWTs) are less well investigated.This paper presents measurements of directivity on a 200 kW VAWT, a so called H-rotor, with variable speed and a tower height of 40 m. The turbine, which is situated in a flat agricultural landscape close to Falkenberg at the Swedish west coast, is one of the world’s largest today operational VAWTs. Experimental results as well as a theoretical model based on the turbulent-boundary-layer trailing-edge (TBL-TE) noise suggest higher noise levels upwind of the rotor and the lowest noise levels in the perpendicular directions. Moreover, modulation analysis of the measurements indicates the presence of modulations but the results are inconclusive.

  • 144.
    Möllerström, Erik
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik. Uppsala University, Uppsala, Sweden.
    Larsson, Sebastian
    Halmstad University, School of Business and Engineering (SET).
    Ottermo, Fredric
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Hylander, Jonny
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Bååth, Lars
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Noise Propagation from a Vertical Axis Wind Turbine2014In: Proceedings of 43rd International Congress on Noise Control Engineering: Internoise 2014 / [ed] John Davy, Charles Don, Terry McMinn, Liz Dowsett, Norm Broner & Marion Burgess, Brisbane, QLD: Australian Acoustical Society , 2014Conference paper (Refereed)
    Abstract [en]

    Initial noise measurements were performed on a 200kW vertical axis wind turbine (VAWT) and results were compared to that of a Vestas V27, a similar size horizontal axis wind turbine (HAWT). Multiple recording units were placed in line downwind of the turbine to investigate noise propagation. The frequency distribution of the noise were analyzed indicating that the VAWT has lower relative levels for frequencies under 3000 Hz, especially within 600-1200 Hz. Furthermore, VAWT noise seems to occur more around the same frequencies as the natural background noise, increasing masking probability. Results from propagation measurements seemed to indicate that noise declines more rapidly with distance for the VAWT then for the reference HAWT, possibly explained by the lower levels at low frequencies. Further investigation is needed to establish these differences and the 200 kW VAWT creates an opportunity doing so utilizing arguably the largest operational VAWT existing today.

  • 145.
    Nilsson, Bertil
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Hansbo, Peter
    Department of Applied Mechanics, Chalmers University of Technology, Gothenburg, Sweden.
    A goal oriented adaptive finite element method for hydrodynamic lubricationManuscript (preprint) (Other academic)
    Abstract [en]

    We present a goal-oriented adaptive finite element method for a cavitation model based on Reynolds' equation. A posteriori error estimates and adaptive algorithms are derived, and numerical examples illustrating the theory are supplied.

  • 146.
    Nilsson, Bertil
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Hansbo, Peter
    Department of Applied Mechanics, Chalmers University of Technology, Gothenburg, Sweden.
    Adaptive finite element solution of a cavitation problem in hydrodynamic lubricationManuscript (preprint) (Other academic)
    Abstract [en]

    We present an adaptive finite element method for a cavitation model based on Reynolds' equation. A posteriori error estimates and adaptive algorithms are derived, and numerical examples illustrating the theory are supplied.

  • 147. Nilsson, Emil
    et al.
    Bååth, Lars
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Fotonik och mikrovågsteknik.
    Multi-dimensional imaging and apparatus2007Patent (Other (popular science, discussion, etc.))
    Abstract [en]

    A method, an antenna, and a system for determining positions for reflectio n points using microwaves. An electromagnetic wave signal is generated at a defined frequency, and transmitted by an antenna unit. the antenna unit includes a transmitter antenna and a plurality of receiver antennas, separated by a kno wn spacing perpendicular to a main line of sight and devised to receive reflect ed portions of the transmitted wave. Phase comparator means are connected to th e transmitter antenna and the receiver antennas, and a control unit connected to the phase comparator means is operable to calculate an angle to a reflection poi nt from detected phase difference between at least two receiver antennas and the spacing between said at least two receiver antennas, and to calculate a distance to the reflection point from detected phase difference between the transmitter antenna and a receiver antenna dependent on the frequency.

  • 148.
    Ohlsson, Robert
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Surface texture knowledge support - ISM2003In: Advanced techniques for assessment surface topography: development of a basis for 3D surface texture standards "SURFSTAND" / [ed] Liam Blunt, Xiangqian Jiang, London: Kogan Page Science , 2003, p. 325-337Chapter in book (Other academic)
    Abstract [en]

    In the recent past there has been a step change in manufacturing strategies and technologies primarily as a result of globalisation and extreme pressure on increasing competitiveness. To be competitive and maintain profit in such a dynamic environment, a manufacturing enterprise must be capable of adjusting quickly to the market. This has lead to the emergence of a new manufacturing strategies such as agile manufacturing, where multiple companies co-operate under flexible virtual enterprise structures. The main purpose of AM is to obtain high quality, shortest lead- time, good service at the lowest cost to satisfy customers' requirements. To respond to the market rapidly, companies have to work closely with their suppliers, customers, and partners to shorten the product development lifecycle and to highlight potential problems. Simultaneous requirements of high quality and rapid co-operative business demands effective information and data handling systems. Specifying surface texture for products will have a heavy impact on the cost and function of the final product and consequently becomes a critical factor in AM based product specification.

  • 149.
    Ohlsson, Robert
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Westberg, John
    Halmstad University, School of Business and Engineering (SET).
    The interrelationship of 3D surface characterisation techniques with standardised 2D techniques2003In: Advanced techniques for assessment surface topography: development of a basis for 3D surface texture standards "SURFSTAND" / [ed] Liam Blunt, Xiangqian Jiang, London: Kogan Page Science , 2003, p. 197-220Chapter in book (Other academic)
    Abstract [en]

    The objectives and main aim of the work discussed in this chapter is to compare 2D with 3D surface roughness parameters measured on functional surfaces. The functional surfaces provided were automotive cylinder liners, steel sheet product and ball bearings. Tests designed to throw light on the dispersion and variability, when measuring and calculating 2D and 3D parameters, were also carried out. These results indicated the number of measurement needed for a surface to receive a stable mean value for the topography. Additionally, work is discussed which shows the functional relationship between traditional 2D surface parameters and a range of the newly developed 3D parameters. This study allowed a deeper understanding of the functionality of automotive cylinder bores, and empirical wear relationships are proposed. Finally, studies were carried out on sheet steel for the purpose of comparing optical and tactile measurement techniques

  • 150.
    Olsson, Sophie
    et al.
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Persson, Isabelle
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Solceller i en interiör bilmiljö2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
12345 101 - 150 of 241
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