Transactions of Materials and Heat Treatment

Title：A process-control method of sidewall curl during the rectangular box drawing

Authors： Zhou Chi Chen Lailai Zhang Saijun Yan Wujun

Unit： South China University of Technology

KeyWords： sidewall curl rectangular box mechanical mechanism floating draw-bead

ClassificationCode：TG386.3

year,vol(issue):pagenumber：2016,41(3):13-17

Abstract：

Sidewall curl of rectangular box is a common springback issue, and it needs to be effectively controlled or compensated. When material flowed through the die radius region, the stress difference of the inner and outer surfaces generated a reverse bending moment and caused springback. Therefore, the rectangular box was divided into corner region, transition region, straight edge region and bottom region, and the simplified model of reverse bending moment is proposed for rectangular box drawing. In this model, the behavior of straight edge region was simplified as U-shaped drawing-bending, while the reverse bending moment of corner region was assumed as zero, and a linear transition region existed in them. Based on the model, the stress changing process of sidewall material in straight edge region was analyzed, and a floating draw-bead process was proposed and implemented to control the sidewall curl of rectangular box. The experimental results show that the floating draw-bead can control sidewall curl effectively, and the sidewall curl value reduces by 86.1% when it throughly works.

Funds：

2014年东莞市产学研合作项目（2014509109204）;2013年省部产学研专项资金技术攻关项目（2013B090600014）

周驰（1973-），男，博士，副教授

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