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Finite element modeling of tube deformation during cold pilgering
Dalarna University, School of Technology and Business Studies, Materials Technology. Luleå University of Technology.
2016 (English)In: MATEC Web of Conferences, 2016, Vol. 80, 15004Conference paper, Published paper (Refereed)
Abstract [en]

A three-dimensional finite element model of cold pilgering of stainless steel tubes is developed in this paper. The objective is to use the model to increase the understanding of forces and deformations in the process. The focus is on the influence of vertical displacements of the roll stand and axial displacements of the mandrel and tube. Therefore, the rigid tools and the tube are supported with elastic springs. Additionally, the influences of friction coefficients in the tube/mandrel and tube/roll interfaces are examined. A sensitivity study is performed to investigate the influences of these parameters on the strain path and the roll separation force. The results show the importance of accounting for the displacements of the tube and rigid tools on the roll separation force and the accumulative plastic strain.

Place, publisher, year, edition, pages
2016. Vol. 80, 15004
Series
MATEC Web of Conferences, E-ISSN 2261-236X
Keyword [en]
cold forming
National Category
Materials Engineering
Research subject
Steel Forming and Surface Engineering
Identifiers
URN: urn:nbn:se:du-23429DOI: 10.1051/matecconf/20168015004ISI: 000392331100086OAI: oai:DiVA.org:du-23429DiVA: diva2:1048375
Conference
NUMIFORM 2016: The 12th International Conference on Numerical Methods in Industrial Forming Processes
Available from: 2016-11-21 Created: 2016-11-21 Last updated: 2017-08-29Bibliographically approved
In thesis
1. Modeling of Cold Pilgering of Tubes
Open this publication in new window or tab >>Modeling of Cold Pilgering of Tubes
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
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.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2017
Series
Licentiate thesis, ISSN 1402-1757
Keyword
Cold pilgering, finite element method, tube forming, tool elasticity, roll flattening
National Category
Applied Mechanics
Research subject
Steel Forming and Surface Engineering
Identifiers
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 (English)
Opponent
Supervisors
Available from: 2017-08-29 Created: 2017-08-29 Last updated: 2017-08-29Bibliographically approved

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