Transactions of Materials and Heat Treatment

Title：Influences of taper angle of punch on radial cold extrusion process of threepillar universal joint pin

Authors： YAN Jian-ming WANG Cheng-yong LI Wei TIAN Zhi-cheng ZHANG He-ning

Unit： School of Material Science and Engineering Hefei University of Technology Hefei 230009 China

KeyWords： FEM threepillar universal joint pin cold extrusion taper angle equivalent stress

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2013,38(2):81-84

Abstract：

The influences of various punch shapes on radial cold extrusion process of the threepillar universal joint pin were analyzed by FEM modeling and physical experiments. The metal flow, extrusion force and punch equivalent stress distribution were analyzed through the results of simulation and physical experiments. The investigation shows that the optimized taper angle of the punch was beneficial for the metal to fill the cavity, and it can suppress the rapid increase of forming load during the end stage and decrease the magnitude of the equivalent stress. The technological test shows that the qualified extrusion is obtained using oblique conedie with taper angle of 30°.

Funds：

教育部科学研究重大资助项目（311025）；国家基金面上资助项目（51275146）；安徽省自然科学基金资助项目(1208085ME71)；国家级大学生创新项目（201210359008）

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