Transactions of Materials and Heat Treatment

Title：Optimal control to the springback of outer panel in auto rear cover

Authors： Sun Dongji Shu Changle Luo Renping Lin Jianping

Unit： Shanghai General Motors Co. Ltd. Tongji University

KeyWords： outer panel in auto rear cover flanging control of springback forming simulation

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(2):32-36

Abstract：

The outer panel in auto rear cover is of complex surfaces and is difficult to form, and with the local contour flanged for welding connection, the springback of flanging was large in the process of testing. Through the analysis of forming process and with the help of forming process simulation by Autoform, the main cause of springback was the excessive materials generated in the flange process. The influence of reducing flanging height and increasing flanging gap on springback was explored. Combined with the two methods, a solution was proposed, namely to decrease the flanging height without affecting the welding and to increase three flanging gaps. The feasibility of the modification and the accuracy of the simulation were verified through sample production and three coordinates measuring. Finally, the springback is reduced by optimal part structure without affecting the function of car.

Funds：

教育部博士点基金项目“基于材料组织性能动态变化的Q&P钢板变形行为研究”（20110072110056）

孙东继(1981-)，男，博士，工程师舒常乐（1992-），男，硕士研究生

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