Transactions of Materials and Heat Treatment

Title：Numerical simulation on multigripper flexible stretch forming process of sheet metal

Authors： Tian Yonghui1 2 Zhao Kunmin1 2 Chen Liangyu1 2

Unit： 1. Intitute of Industry & Equipment Technology Hefei University of Technology Hefei 230009 China  2. Provincial Key Laboratory of Infectious Manufacturing and Equipment for Aviation Structural Parts Hefei 230009 China

KeyWords： flexible stretch forming process multigripper hinge joint mode lubrication condition unloading springback

ClassificationCode：TG306

year,vol(issue):pagenumber：2019,44(5):35-40

Abstract：

Multigripper flexible stretch forming technology (MGFSFT) can overcome the forming defects existing in the traditional stretch forming technology. Therefore, the structural composition of multigripper flexible stretch machine was researched, and the characteristics of MGFSFT were analyzed. For Sshaped surface, saddleshaped surface and spherical surface, the multigripper flexible stretch forming process was simulated by finite element analysis software ABAQUS. The numerical simulation results show that considering the forming quality of part and the difficulty in research and manufacturing of stretch forming machine，the relatively high degree of clamp discretization can improve the forming quality of Sshaped part. Compared with the common hinge joint mode, adopting the spherical hinge joint mode between clamp and hydraulic cylinder can get better forming quality in the end of effective forming zone for saddleshaped part. By improving the lubrication condition between sheet metal and die, the effective forming zone of spherical part can be stretched more fully, and the springback is smaller.

Funds：

国家自然科学基金资助项目（11472072，51775160）

作者简介：田永辉（1993－），男，硕士研究生 Email：yhtianstudy@sina.com 通讯作者：赵坤民（1971－），男，博士，教授，博士生导师 Email:kmzhao@dlut.edu.cn

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