Transactions of Materials and Heat Treatment

Title：Forming process optimization for inner panel of car trunk lid based on AutoForm

Authors： Xiao Lianghong Luo Huina Xiang Junzhong Long Tao

Unit： Xiangtan University

KeyWords： inner panel of car trunk lid drawing process numerical simulation wrinkling cracking

ClassificationCode：TG385

year,vol(issue):pagenumber：2014,39(6):60-64

Abstract：

Taking the inner panel of car trunk lid as the object of study,the drawing process of inner panel of car trunk lid was numerically simulated using the finite element analysis software of AutoForm. The simulation results show that there are wrinkling risks on the binder surfaces, and three cracking risks occur in the middle of part (Half of a blank). After some process optimization measures were taken, such as cutting notches in the blank edge near cracks, increasing the die radius of two obvious cracking positions respectively from 14 mm and 3 mm to 18 mm and 4.5 mm and decreasing the blank holding force from 500 kN to 400 kN, the simulation results show that the wrinkling risks on binder surfaces are reduced. The production practice shows that no defects of wrinkling and cracking exist in the inner panel of car trunk lid produced with the optimized process to draw inner panel parts, which is agreement with the numerical results, and the correctness of numerical simulation is sufficiently verified.

Funds：

国家自然科学基金资助项目（51175445）；湘潭大学博士启动基金（12QDZ17）

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