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Measuring strategies for smooth tool steel surfaces
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).ORCID iD: 0000-0002-9084-819X
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.ORCID iD: 0000-0001-8058-1252
2008 (English)In: Proceedings: January 28th and 29th, 2008, Germany, Chemnitz = XII. Internationales Oberflächenkolloquium, Aachen: Shaker Verlag, 2008, p. 110-119Conference 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. p. 110-119
Keywords [en]
replicas, surface characterisation, measuring strategies
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hh:diva-2189Local ID: 2082/2586ISBN: 978-3-8322-6912-8 ISBN: 3-8322-6912-6 OAI: oai:DiVA.org:hh-2189DiVA, id: diva2:239407
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
In thesis
1. Polishability of tool steels: Characterisation of high gloss polished tool steels
Open this publication in new window or tab >>Polishability of tool steels: Characterisation of high gloss polished tool steels
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. p. 50
Series
[Technical report] / Department of Materials and Manufacturing Technology, Chalmers University of Technology, ISSN 1652-8891 ; 45
Keywords
tool steels, surface characterisation, polishability, 3D parameters, high gloss polishing
National Category
Manufacturing, Surface and Joining Technology
Identifiers
urn:nbn:se:hh:diva-6179 (URN)
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

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Rebeggiani, SabinaRosén, Bengt-Göran

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