hh.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Polishability of tool steels: Characterisation of high gloss polished tool steels
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.ORCID iD: 0000-0002-9084-819X
2009 (English)Licentiate 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.

Place, publisher, year, edition, pages
Göteborg: Chalmers University of Technology , 2009. , 50 p.
Series
[Technical report] / Department of Materials and Manufacturing Technology, Chalmers University of Technology, ISSN 1652-8891 ; 45
Keyword [en]
tool steels, surface characterisation, polishability, 3D parameters, high gloss polishing
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:hh:diva-6179OAI: oai:DiVA.org:hh-6179DiVA: diva2:357987
Presentation
2009-03-04, Seminar room Delta-Gamma, Hörsalsvägen 7, Chalmers University of Technology, Gothenburg, 13:15 (English)
Opponent
Available from: 2010-11-09 Created: 2010-10-20 Last updated: 2013-11-19Bibliographically approved
List of papers
1. Measuring strategies for smooth tool steel surfaces
Open this publication in new window or tab >>Measuring strategies for smooth tool steel surfaces
2008 (English)In: Proceedings: January 28th and 29th, 2008, Germany, Chemnitz = XII. Internationales Oberflächenkolloquium, Aachen: Shaker Verlag, 2008, 110-119 p.Conference paper, Published paper (Other academic)
Abstract [en]

Comparisons between different measuring strategies were made on three types of smooth tool steel surfaces. Three replica materials were tested to study possibilities within replication techniques. An optical interferometer as well as a mechanical stylus was used to evaluate the surfaces. The results showed that the tested replica materials generated good representations of both the form and the surface roughness (Sq > 300 nm). The evaluated surfaces were quite homogeneous, thus, few measurements are needed to get representative results. However, it was found that caution must be taken regarding manually polished surfaces which can be less homogenous and therefore require more measurements to get representative results.

Place, publisher, year, edition, pages
Aachen: Shaker Verlag, 2008
Keyword
replicas, surface characterisation, measuring strategies
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hh:diva-2189 (URN)2082/2586 (Local ID)978-3-8322-6912-8 (ISBN)3-8322-6912-6 (ISBN)2082/2586 (Archive number)2082/2586 (OAI)
Conference
XII. Internationales Oberflächenkolloquium, 28-29 January, 2008, Germany, Chemnitz
Available from: 2008-12-09 Created: 2008-12-09 Last updated: 2014-03-05Bibliographically approved
2. Evaluation of a robot assisted polishing equipment
Open this publication in new window or tab >>Evaluation of a robot assisted polishing equipment
2008 (English)In: Proceedings (CD) of the 2nd Swedish Production Symposium; Stockholm, Sweden, 2008, 6- p.Conference paper, Published 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.

Keyword
robot assisted polishing, tool steel, surface characterization
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hh:diva-6152 (URN)
Conference
The 2nd Swedish Production Symposium, 18-20 November, Stockholm, Sweden, 2008
Available from: 2010-10-19 Created: 2010-10-18 Last updated: 2014-03-05Bibliographically approved
3. Tool steel polishing and topography characterization
Open this publication in new window or tab >>Tool steel polishing and topography characterization
2007 (English)In: The Swedish Production Symposium in Göteborg 28-30 August 2007, 2007Conference paper, Published 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.

Keyword
tool steel, polishing, 2D and 3D parameters, surface characterisation
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hh:diva-2711 (URN)2082/3113 (Local ID)2082/3113 (Archive number)2082/3113 (OAI)
Conference
The Swedish Production Symposium 2007, 28-30 August 2007, Göteborg, Sweden
Available from: 2009-07-06 Created: 2009-07-06 Last updated: 2015-01-26Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Rebeggiani, Sabina
By organisation
Functional Surfaces
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar

Total: 602 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf