Transactions of Materials and Heat Treatment

Title：Simulation of backward extrusion process and improvement of mold life for automobile three-column groove shell

Authors： Ren Yan1 Shi Bingxin2

Unit： 1.Hebi Institute of Engineering and Technology Henan Polytechnic University 2.Hebi Tianqi Automobile Mould Co. Ltd.

KeyWords： three-column groove shell backward extrusion punch wear mold life coating

ClassificationCode：TG316

year,vol(issue):pagenumber：2023,48(8):96-103

Abstract：

In order to solve the problem of serious punch wear during the actual backward extrusion process for automotive three-column groove shell, an Archard wear model was established and imported into Deform-3D software to simulate the backward extrusion process, and the wear law of punch was studied. The results show that the temperature at the fillet corner of punch is the highest, the wear depth is the largest, and the punch load is larger, which are not conducive to improving the life of punch. The factors affecting the life of punch were analyzed, and taking the maximum wear depth and the maximum load of punch as the optimization objectives, the process parameters such as fillet radius of punch,bevel angle of punch, heating temperature of billet, preheating temperature of mold and extrusion speed were optimized by the orthogonal test methods. The wear of punch after surface coating treatment was studied. And the results show that the coating has a good wear-reduction ability, and the TiAlN coating has the best wear-reduction ability. Finally, the actual production shows that the life of the improved punch is more than twice that of the current one, which greatly reduces the cost of mold.

Funds：

河南省科技攻关项目（212102310488）

作者简介：任燕（1986-），女，硕士，讲师,E-mail：renyan19860@163.com

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