Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental verification on stamping formability for automobile crossbeam

Authors： Mao Weiguo

Unit： SAIC GM Wuling Automobile Co. Ltd.

KeyWords： automobile crossbeam stamping forming springback blank holder force numerical simulation

ClassificationCode：TG386

year,vol(issue):pagenumber：2017,42(4):55-58

Abstract：

The formability of automobile crossbeam was simulated by finite element modeling software Autoform. Then, the process route of blanking bending trimming, side piercing flanging, up-flangingside sizingcutting,piercing, side cutting, side piercing was designed, and the trend of springback was predicted. The results show that the springback at tail end of crossbeam reduces to 1.75 mm when the blank holder force increases to 1500 kN, that is to see that the plastic forming is improved and the springback is deduced by increasing blank holder force. The simulation result which verified by experiment indicates that the prediction of defect position of wrinkle as well as range is accurate. Then, the springback can be predicted qualitatively by numerical simulation, and the modified result is re-simulated over and over again. Therefore, the springback can be reduced from 13 mm to 2 mm. The springback obtained by practical part measurement is compensated and modified by combining with its numerical simulation result, and the part dimension accuracy can be improved.

Funds：

国家重点研发计划（2016YFB0300405）

毛卫国（1971-），男，学士，工程师 E-mail：weiguo.mao@sgmw.com.cn

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