Transactions of Materials and Heat Treatment

Title：Multi-objective optimization on process parameters for automobile trunk cover based on RSM and GA

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ClassificationCode：TG386.31

year,vol(issue):pagenumber：2021,46(3):75-81

Abstract：

For the problems of crack and wrinkle during the deep drawing of trunk cover for a certain car model, first, the finite element model of trunk cover was established based on DYNAFORM, and then the comprehensive influences of blank holder force x1, draw-bead resistance x2 and x3 on the deep drawing of trunk cover were explored. Then, a central composite design (CCD) scheme was established, and the second-order response surface method (RSM) model of the process parameters affecting the forming was constructed by the CCD scheme. Furthermore, a multi-objective optimization function was established by taking the maximum thinning rate y1 and the maximum forming force y2 of sheet metal as the sptimization objects, and the model optimization was conducted by improved genetic algorithm (GA) to obtain the best combination of process parameters affecting the forming of trunk cover with x1=520 kN, x2=80.03 N·mm and x3=82.18 N·mm. Finally, the best combination of process parameters was tested and verified. The test results show that the proposed method effectively improves the forming quality of car trunk cover, which has certain guiding significance for the forming quality control of similar covering parts.

Funds：

上海工程技术大学校企合作项目(CL-003)

周志伟(1995-)，男，硕士研究生 E-mail：1280273130@qq.com 通讯作者：龚红英(1974-)，女，博士，教授 E-mail：ghyyw@163.com

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