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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 3    June 2007

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Numerical simulation of upsetting-extruding process of dispersion
strengthened copper welding electrode
WANG Meng-jun(王孟君)1, ZHANG Ying-chun(张迎春)1,
HUANG Dian-yuan(黄电源)1, LIU Xin-yu(刘心宇)2

1. School of Materials Science and Engineering, Central South University,
Changsha 410083, China;
2. Department of Information Material Science and Engineering,
Guilin University of Electronic Technology, Guilin 541004, China

Abstract:The simulation of the upsetting-extruding process of dispersion strengthened copper welding electrode was carried out using Deform-2D finite element analysis software, and the characteristics of metal flow and the effect of different friction factors were analysed. The results show that the whole forming process consists of a forward extrusion and a backward extrusion. When the friction factor of the female die is 0.4, it is advantageous to the forward extrusion forming of the electrode work nose part, while the friction factor of the male die is only 0.1, it would be benefit to the backward extrusion forming of the electrode fit-up hole part. Addition of a scoop channel with 1.5 mm in depth and 4 mm in diameter at the bottom of the female die can avoid folds at the work nose. The rise in temperature is about 60 ℃ during the forming process.

 

Key words: dispersion strengthened copper; welding electrode; upsetting-extruding; finite element analysis; friction factor

ISSN 1672-7029
CN 43-1423/U

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