Transactions of Materials and Heat Treatment

Title：Influence of pre-strain on quality of blanking cross section for aluminum alloy sheet

Authors： Hu Dewei Chen Jieshi Hu Xiao Gong Pihao

Unit： Shanghai Jiao Tong University State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel)

KeyWords： aluminum alloy pre-strain cross section quality blanking clearance blanking angle proportion of bright region

ClassificationCode：TG389

year,vol(issue):pagenumber：2018,43(4):47-52

Abstract：

The blanking experiments with nine sets of process parameters were designed, and the influences of blanking clearance and blanking angle on the quality of blanking cross section for aluminum alloy sheet were studied. With the increasing of blanking clearance, the proportion of bright region decreases gradually which playes a decisive role to the cross section quality. When the blanking angle is 10°, the proportion of bright region is relatively high. Furthermore, the uniaxial tensile and biaxial equal tensile experiments were designed under different values and directions of pre-strain, and the influence of pre-strain on the quality of blanking cross section for aluminum alloy sheet was studied by experiments. The results show that the profile of cross section is slightly affected by the pre-strain, but the proportion of bright region is obviously reduced, and the effect of pre-strain on the proportion of bright region of AA5182 is greater than that of AA6016. When the uniaxial tensile pre-strain is 5% in the 90° direction, the proportion of bright region is decreased to the maximum, namely, 17.51% for AA5182 and 8.76% for AA6016. Besides, the proportion of bright region is slightly affected by the pre-strain direction which is 1%. Furthermore, for AA5182 and AA6016, the proportion of bright region under biaxial equal tensile pre-strain is reduced larger than that under uniaxial tensile pre-strain, which is 18.27% and 16.74%, respectively.

Funds：

宝钢资助项目

胡德伟（1991-），男，硕士研究生；E-mail：hudewei2009@163.com；通讯作者：陈劼实（1979-），女，博士，副研究员；E-mail：chenjieshi@sjtu.edu.cn

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