Transactions of Materials and Heat Treatment

Title：Multi-objective optimization on stamping process parameters for automotive front door outer panel based on CAE and gray relational analysis

Authors： Zhu Chao Wang Leigang Huang Yao

Unit： Jiangsu University

KeyWords： front door outer panel stamping orthogonal test gray relation multi-objective optimization

ClassificationCode：TG386.3

year,vol(issue):pagenumber：2018,43(8):39-43

Abstract：

For automotive front door outer panel, according to preliminary numerical simulation results of AutoForm, taking the maximum thinning and the maximum springback after trimming as the optimization objectives, and taking the drawing circle radius R, drawbead resistance, friction coefficient, blank holder force and stamping speed as the independent variables, the orthogonal test of five factors and four levels was designed. Then, the data of orthogonal test were processed by grey relational analysis method, and the correlation coefficient and correlation degree of each process parameter to the objective function were calculated. Therefore, the optimal combination of process parameters for multi-objective optimization was obtained with the drawing circle radius of 27 mm, drawbead resistance of 175 N·mm-1, friction coefficient of 0.13, blank holder force of 1450 kN and stamping speed of 2500 m·s-1. Furthermore, the forming process was simulated again by AutoForm with optimized process parameters. The results show that the maximum thinning and the maximum springback after trimming are reasonably controlled, and the die is designed, manufactured and tested by the optimized process parameters to guide the process design and springback compensation. Thus, the actual results show that the stamping quality of the front door outer panel is qualified.

Funds：

国家自然科学基金资助项目（51275216，51775249）

朱超（1991-），男，硕士研究生，E-mail：1326469994@qq.com；通讯作者：王雷刚（1963-），男，博士，教授，博士生导师，E-mail：lgwang@ujs.edu.cn

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