Transactions of Materials and Heat Treatment

Title：Cold upsetting process analysis and die core structure optimization on floating die for special-shaped parts of vehicle

Authors： Li Tianxiang Zhang Lihu

Unit： Bazhong Vocational and Technical College

KeyWords： old life floating die wear cold upsetting speed of punch die fillet

ClassificationCode：TH164

year,vol(issue):pagenumber：2021,46(11):62-67

Abstract：

For a special-shaped part of vehicle, in order to solve the problems existing in actual production, such as large forming force, short mold life, insufficient product filling and poor forming quality, the original production process was improved according to the structural characteristics of the part, and the extrusion process with floating die was put forward, and the working principle of floating die structure and the variation law of friction force were analyzed. Then, the forming processes of the two processe were simulated and analyzed by CAE analysis software DEFORM-3D, and the problems existing in the original production process and the improvement degree of the improved process were intuitively understood. In addition, based on the floating die structure, the die core structure was optimized with the minimum wear of the die core as the optimization goal. Finally, the influences of punch cold upsetting speed and die fillet on the loads of punch, die and die core were analyzed, and the cold upsetting process parameters of floating die structure were optimized. The results show that the defects of the original process are effectively improved by using the floating die structure, and the wear is effectively reduced by using the flat bottom die core structure. When the cold upsetting speed of punch is 10 mm·s-1 and the die fillet is 0.8 mm, the load on each punch and die is the minimum, and the process problems are effectively solved by the finite element technology.

Funds：

四川省教育科学研究所立项课题（川教厅办函〔2016〕56号）

作者简介：李天翔（1989-），男，硕士，讲师，E-mail：2084182332@qq.com；通信作者：张利虎（1986-），男，学士，讲师，E-mail：271525892@qq.com

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