Transactions of Materials and Heat Treatment

Title：Springback research and control about mini-car beam based on variable blankholder force technology

Authors： WANG Jian1 HU Xing1 LIU Li-na2 LU You-ping2(1.Automotive Engineering Research Institute Shanghai Jiaotong University Shanghai 200240 China 2.Technology Center Shanghai General Motor Wuling Liuzhou 545007 China)

Unit：

KeyWords： beam springback simulation variable blankholder force

ClassificationCode：TG386

year,vol(issue):pagenumber：2008,33(5):55-59

Abstract：

The springback phenomenon in mini-car beam forming is one of the main quality problems,which may affect the tolerance and final shape of stampings.In order to control springback effectively,mini-car's right back beam forming was designed and simulated based on variable blank holder force technology.The result of simulation indicates that the larger span of blank holder force can induce fewer springback.Finally,a kind of variable blank holder force method which could be conveniently realized in inverted draw die was introduced.This method has been applied to the drawing of mini-car's right back beam which has good effects on springback control.Maximum springback angle diminishes from 8° to 2°.

Funds：

上汽通用五菱(SGMW)供应商质量能力提升项目(20070701);; 柳州市重点科技攻关项目

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