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Finite element analysis of cold pilgering using elastic roll dies
Högskolan Dalarna, Akademin Industri och samhälle, Materialteknik. Luleå University of Technology, Department of Engineering Sciences and Mathematics.
Sandvik Materials Technology, R&D, Sandviken..
Sandvik Materials Technology, R&D, Sandviken..
Luleå University of Technology.
2017 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

A finite element model of cold pilgering with elastic roll dies have been developed and used to investigate the influence of roll die deformation on the material flow, contact region, roll separating force and tube dimensions. Full scale experiments were performed to validate the contact surface and tube dimensions. The results show that the influence of roll die flattening is not significant on the contact length. However, elastic deformation of roll die has strong influence on both the wall thickness reduction and roll separating force. Thus it is recommended to consider elasticity of roll dies when forces and tube dimensions are estimated.

sted, utgiver, år, opplag, sider
Elsevier, 2017.
Serie
Procedia Engineering, ISSN 1877-7058 ; 2017
Emneord [en]
cold pilgering; cold forming; tube forming; roll flattening; contact length; roll separating force; finite element method; tool elasticity; tube dimension
HSV kategori
Forskningsprogram
Stålformning och ytteknik
Identifikatorer
URN: urn:nbn:se:du-25901DOI: 10.1016/j.proeng.2017.10.1010OAI: oai:DiVA.org:du-25901DiVA, id: diva2:1136734
Konferanse
International Conference on the Technology of Plasticity, ICTP 2017, Cambridge, United Kingdom, 17-22 September 2017
Tilgjengelig fra: 2017-08-29 Laget: 2017-08-29 Sist oppdatert: 2017-12-18bibliografisk kontrollert
Inngår i avhandling
1. Modeling of Cold Pilgering of Tubes
Åpne denne publikasjonen i ny fane eller vindu >>Modeling of Cold Pilgering of Tubes
2017 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Cold pilgering is a challenging tube forming process in terms of modeling due to the complexity in kinematic of tools, friction condition and material behavior. The process development has mostly been based on simple formulas and costly full-scale tryouts. The aim in this study is to develop validated Finite element models of cold pilgering to increase the understanding of influence of the process parameters on the produced tubes.

In the course of this thesis, three-dimensional mechanical and thermo-mechanical Finite element models of cold pilgering were developed. The commercial code MSC.Marc was used in the simulations. General 3D models are needed to be able to capture asymmetric deformation in cold pilgering. It was found that tool deflections together with elastic deformation of roll dies have considerable influence on the rolling force. Furthermore, the strain rate and temperature effects on the response of the material and thereby on the rolling force were evaluated.

sted, utgiver, år, opplag, sider
Luleå: Luleå University of Technology, 2017
Serie
Licentiate thesis, ISSN 1402-1757
Emneord
Cold pilgering, finite element method, tube forming, tool elasticity, roll flattening
HSV kategori
Forskningsprogram
Stålformning och ytteknik
Identifikatorer
urn:nbn:se:du-25902 (URN)978-91-7583-873-1 (ISBN)978-91-7583-872-4 (ISBN)
Presentation
2017-05-31, E130, Luleå tekniska universitet, Luleå, 10:25 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2017-08-29 Laget: 2017-08-29 Sist oppdatert: 2017-08-29bibliografisk kontrollert

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