Transactions of Materials and Heat Treatment

Title：Optimization on drawing process parameters for pickup tailgate outer panel based on gray relational analysis

Authors： Huang Zhonghui Huang Yao Wang Leigang Hu Ya′nan

Unit： School of Materials Science and Engineering Jiangsu University

KeyWords： tailgate outer panel drawing crack wrinkle gray relation multiobjective optimization

ClassificationCode：U463.83

year,vol(issue):pagenumber：2017,42(6):39-42

Abstract：

In order to solve the crack and wrinkle defects during the drawing process, the drawing process parameters were optimized by combining gray relation analysis with numerical simulation. Then, the orthogonal experiment with five factors and four levels was carried out by setting the maximum thinning rate and the maximum thickening rate as the optimization objectives and setting the drag coefficient from rounded and straight edge of drawbead, the blank holder force, the forming speed and the friction coefficient as the process parameter variables. Then, the finite element numerical simulation was conducted by AutoForm software. Based on the gray relational analysis method, the gray relational degrees of each process parameter to the comprehensive index of crack and wrinkle were calculated respectively, and the optimum process parameters were obtained with the drag coefficient of the round drawbead of 0.15, the drag coefficient of the straight edge drawbead of 0.45, the blank holder force of 800 kN, the forming speed of 3.5 m·s-1 and the friction coefficient of 0.13. In addition, by applying the optimal combination of process parameters to manufacture die and product onsite, the stamping parts with good quality were obtained, and the risk of crack and wrinkle could be controlled effectively.

Funds：

国家自然科学基金资助项目（51275216）

黄忠辉（1989-），男，硕士研究生王雷刚（1963-），男，博士，教授，博士生导师

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