Transactions of Materials and Heat Treatment

Title：Study on influence factors and regularity of surface distortion for automobile exterior panels

Authors： Deng Lulu Lin Jianping Hou Yong He Liang Wang Yan

Unit： Tongji University SAIC General Motors Co. Ltd.

KeyWords： automobile exterior panels stamping forming surface distortion process parameters material parameters simulation analysis

ClassificationCode：TG386

year,vol(issue):pagenumber：2018,43(8):58-64

Abstract：

The characteristic structure was extracted from the front cover porthole, and the profile feature of sharp corner step surface was designed. Then, the stamping test and forming simulation analysis of structural parts with sharp corner step surface were carried out, and the accuracy of the simulation model was validated. Furthermore, based on the accurate simulation model, the influences of common material parameters and process parameters on surface distortion were studied, and the orthogonal tests were designed for several parameters, which were easy to be changed in the actual production process. Finally, the influences of blank holder force, stamping speed, friction coefficient, plate thickness and drawbead on the surface distortion were analyzed. The results show that the influence degree of the above parameters on the surface distortion from large to small is plate thickness, drawbead, stamping speed, blank holder force and friction coefficient. Thus, during the actual production of automobile exterior panels, the surface distortion can be controlled from the aspects of material selection and process optimization.

Funds：

邓璐璐（1995-），女，硕士研究生，E-mail: 18939727262@163.com；通讯作者：林建平（1958-），男，博士，教授，博士生导师，E-mail:jplin58@tongji.edu.cn

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