Transactions of Materials and Heat Treatment

Title：Multi-objective optimization on influencing factors for central pillar inner plate of automobile based on response surface

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ClassificationCode：TG386.3

year,vol(issue):pagenumber：2020,45(7):46-50

Abstract：

For the inner plate of a automobile′s central pillar, taking the friction coefficient,

stamping speed, blank holder force and clearance between punch and die as the design variables, thirty experimental schemes were selected by the optimal Latin hypercube test design, and the maximum thickening rate and the maximum thinning rate after drawing were simulated by software Autoform R6. Then, the fourth-order response surface approximate model of two target values for the maximum thickening rate and the maximum thinning rate was established by the simulation results, and the influences of influencing factors on the target values were analyzed. After multi-objective optimization, the friction coefficient was 0.17, the stamping speed was 3500 mm·s-1, the blank holder force was 450 kN, the clearance between punch and die was 0.55 mm,under these process parametens, the maximum thickening rate was 0.95% and the maximum thinning rate was 10.65%. However, the simulated values of the maximum thickening rate and the maximum thinning rate obtained by the simulation with the optimized process parameters were 0.96% and 12.20% respectively to prove the effectiveness of multi-objective optimization results. According to the combination of optimized process parameters, the trial production of parts was conducted, the drawing parts of inner plate for automobile′s central pillar were produced without wrinkle and cracking to meet the requirements, which improved the efficiency of parts from design to production.

Funds：

国家自然科学基金资助项目（51775249）

王钊（1994-），男，硕士研究生 E-mail：1138673857@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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