Transactions of Materials and Heat Treatment

Title：Research on formability of flangeless cylindrical cup based on servo drawing without blank holding force

Authors： Ou Lingtao Pan Xiaotao Qu Xinghui Xu Xinjue Ruan Weiping Sun Yousong

Unit： Guangdong University of Technology Guangdong Metal Forming Machine Works Co． Ltd．

KeyWords： servo crank press flangeless cylindrical cup servo drawing forming quality

ClassificationCode：TG305

year,vol(issue):pagenumber：2014,39(11):56-61

Abstract：

For the flangeless cylindrical cup, the drawing die without blank holding force and the working pattern of servo press were designed. Based on different drawing heights and speeds, the changes of thickness thinning rate, work-hardening and microstructure of cylindrical cup were analyzed, and the influence of servo drawing speed on the forming quality of parts was obtained. The experimental results show that the part reaches the forming limit when the servo drawing height is 43.5 mm, and firstly drawing coefficient is reduced from m=0.5 to m=0.47 compared with the traditional drawing, and also the thickness thinning rate of the part and the occurrence of micro-cracks at the corner can be reduced, thereby the forming quality of the part is improved.

Funds：

粤港关键领域重点突破项目（2009Z019)

欧凌涛（1988-），男，硕士研究生

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