Transactions of Materials and Heat Treatment

Title：Preformed billet design and forming process simulation for automobile thin-walled pipe

Authors： Yang Zhong1 Wang Yanfeng2

Unit： 1. Hebei Yutian Vocational and Technical Education Center 2. North China University of Science and Technology

KeyWords： thin-walled pipe closed extrusion preformed billet material utilization rate mold wear

ClassificationCode：TG376.2

year,vol(issue):pagenumber：2023,48(2):102-110

Abstract：

In order to solve the problems of low material utilization rate and high cost caused by the machining for a certain type of automobile thin-walled pipe, a processing method of turning after closed extruded billet was proposed, and according to the characteristics of pipe, the structure of the difficult forming parts was improved. Then, three kinds of preformed billet with different shapes were designed, the simplified design of the forming mold was carried out, and the numerical analysis was carried out by software Deform-3D. Furthermore, the forming process of the preformed billet for each scheme was analyzed through the material flow situation, and the potential defects of each scheme were explained. At the same time, the material utilization rate, the forming load and the mold wear of different schemes were compared. The results show that scheme 1 has the highest material utilization rate, but there are forming defects and mold damage risks. Scheme 2 and scheme 3 can obtain the required preformed billet shape, but scheme 2 has the problem of poor demoulding, while scheme 3 is ideal in terms of material utilization rate, forming load and mold wear. Finally, the qualified thin-walled pipe is obtained through scheme 3, which has good production effect and solves the problem of low material utilization rate.

Funds：

作者简介：杨忠（1971-），男，学士，高级讲师，E-mail：yangz197110@163.com

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