Transactions of Materials and Heat Treatment

Title：Optimization on cold upsetting process for step positioning pin based on numerical simulation

Authors： Wang Lin Wang Mingqiang

Unit： Jiangsu Province Lianyungang Industry & Trade Advanced Vocational School Jiangsu University of Science and Technology

KeyWords： cold upsetting step positioning pin die design finite element simulation orthogonal test

ClassificationCode：TH162

year,vol(issue):pagenumber：2019,44(7):96-100

Abstract：

In order to reduce cost and improve production efficiency, a cold upsetting process of step positioning pin was proposed, and the traditional method of die modification by experience was abandoned. Based on the theory of plastic forming, the simple die design was carried out according to the characteristics of parts, and the main factors affecting the forming of parts were analyzed. Combined with DEFORM-3D finite element simulation and orthogonal test method, the orthogonal test of five factors and four levels was designed including speed of upper punch, cone angle of die, transition fillet of die, friction coefficient and chamfer of floating punch, and the optimum process parameters were obtained with the optimization objective of minimizing the load on the die during the forming process. The results show that when the chamfer of floating punch is 0.3 mm, the cone angle of die is 10°, the transition fillet of die is 0.1 mm, the speed of upper punch is 6 mm·s-1 and the friction coefficient is 0.10, the forming load of die is minimum. Finally, based on the actual production, the feasibility of the experiment is verified by comparing with the simulation results.

Funds：

王琳（1968-），男，硕士，正高级讲师，E-mail：767566286@qq.com；通讯作者：王明强（1964-），男，硕士，教授，E-mail：1024038901@qq.com

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