Transactions of Materials and Heat Treatment

Title：Deformation regulation of backward extrusion for three-column groove shell and structure design of punch for improving backward extrusion transverse plane evenness

Authors： Sun Xiaoyan Zhang Tailiang Zhang Koubao Chen Liang Wang Guangchun Zhao Guoqun

Unit： Yantai Engineering and Technology College Jiangsu Winner Machinery Co. Ltd. Shandong University

KeyWords： three-column groove shell warm backward extrusion transverse plane evenness structure of punch

ClassificationCode：TG316

year,vol(issue):pagenumber：2017,42(2):143-149

Abstract：

For the problem of uneven transverse plane of three-column groove shell after warm backward extrusion in the tripod universal joint, according to the numerical simulation of the original process and the special non-axisymmetric structural characteristics of the cup body, a backward extrusion punch was redesigned, and the working length of punch side wall and the cone angle at different areas of punch bottom were designed respectively. Therefore, the backward extrusion punch in the area closer to the center was set by larger die working length and smaller cone angle, while the backward extrusion in the area far from the center was set by shorter die working length and larger cone angle. The finite element numerical simulation results show that the transverse plane evenness of the three-column groove shell extruded by redesigned punch is improved obviously. The unevenness of the transverse plane reduces from 3.84 to 2.17 mm. According to production testing, the unevenness of the transverse plane of sample is 2.32 mm, and it closes to the simulation result. The redesigned backward extrusion punch can reduce the machining allowances and improve the material utilization rate.

Funds：

2014年度江苏省重大科技成果转化专项资金项目（BA2014145）；2015年江苏省“双创团队”资助项目

孙晓燕（1982-），女，硕士，讲师

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