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| Numerical model establishment and verification of cold pilgering on cycle feed rate |
| Zhi-bing Chu1,2 ? Dong Wei1 ? Lian-yun Jiang1 ? Duo Zhang1 ? Qing-xue Huang1,2 ? Yu-gui Li1,2 |
1 Heavy Machinery Engineering Research Center of Ministry of Education, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, China
2 Shanxi Provincial Key Laboratory of Metallurgical Device Design Theory and Technology, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, China |
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Abstract A numerical model was established to calculate the cycle feed rate through studying the case of a cold pilger mill with the 304 stainless steel pipe. Firstly, the precise constitutive equation of 304 stainless steel was obtained through nonlinearly fitting the true stress�Cstrain data from unidirectional tensile test. Then, the numerical method to calculate the equivalent deformation was determined according to the plastic deformation feature of the steel tube during cold rolling and the incremental theory. Finally, the cycle feed rate of cold rolled 304 stainless steel pipe was extracted when formulating springback through utilizing above results comprehensively and unloading law. Stress state, metal flow, finished pipe size and distribution of residual stress were obtained by finite element method to calculate the whole rolling process when the cycle feed rate was 10 mm, and the optimized model was verified through finished pipe size.
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Received: 03 March 2017
Published: 15 October 2018
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2018, Vol. 25 
