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Cold roll forming of a U-channel made of high strength steel
Dalarna University, School of Technology and Business Studies, Materials Technology.
2007 (English)In: Journal of Materials Processing Technology, ISSN 0924-0136, E-ISSN 1873-4774, Vol. 186, no 1-3, p. 77-81Article in journal (Refereed) Published
Abstract [en]

Cold roll forming is a bending process where the bending occurs gradually in several forming steps from an undeformed strip to a finished profile. The process is very interesting for the sheet metal industry due to the high speed in which the profile can be produced. High strength steel has, in recent years, become more common in cold roll forming. These materials have advantages but also disadvantages that affect the design of the process. Simple models in literature [K.F. Chiang, Cold roll forming, ME Thesis, University of Auckland, August 1984] predict that the longitudinal peak membrane strain in the flange of a profile is independent of the material properties. However, Ingvarsson [L. Ingvarsson, F¨orenklad teori f¨or rullforming av element¨ar v-profil, j¨amf¨orelse mellan normalt och h¨ogh°allfast st°al, VAMP 15- rullforming 23 april 2001] compared mild and ultra high strength in a roll forming experiment and the conclusion was that the material properties will affect the finished profile. This paper is a fundamental study performed in order to understand the observation by Ingvarsson [L. Ingvarsson, F¨orenklad teori f¨or rullforming av element¨ar v-profil, j¨amf¨orelse mellan normalt och h¨ogh°allfast st°al, VAMP 15- rullforming 23 april 2001]. The objectives of this study are to investigate the change in the longitudinal peak membrane strain at the flange edge and the deformation length when the yield strength increases. These are important since they can be used to determine the number of forming steps and the distance between them when designing the cold roll forming machine. The result from the simulations show that the longitudinal peak membrane strain decreases and the deformation length increases when the yield strength is increased.

Place, publisher, year, edition, pages
2007. Vol. 186, no 1-3, p. 77-81
Keyword [en]
Cold roll forming; High strength steel; Finite element analysis
National Category
Materials Engineering
Research subject
Stålformning och ytteknik, Simulering och experimentell undersökning av rullformningsprocessen
Identifiers
URN: urn:nbn:se:du-3219DOI: 10.1016/j.jmatprotec.2006.12.017OAI: oai:dalea.du.se:3219DiVA, id: diva2:519926
Available from: 2008-03-07 Created: 2008-03-07 Last updated: 2017-12-07Bibliographically approved

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CiteExportLink to record
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