Numerical simulation analysis of flexible blank holder technology applied to a multi-point forming process

Abstract

In this paper, the principles of flexible blank holder technology applied to the multi-point forming process is introduced and a finite element model of the multi-point forming device with blank holder is established. Adopting the flexible blank holder multi-point forming process, a numerical simulation research is conducted on the forming process of spherical parts. Through the numerical simulation results, when a different blank holder area is adopted, the forming defects of wrinkling, tension cracks, and spring-back, the stress-strain distribution and the influence of the sheet metal are analyzed and compared, and the effects of the material parameters on the results of flexible blank holder multi-point forming are investigated. The results show that, under the same situation, the formed parts obtained by using a smaller blank holder area have uniform stress-strain and thickness distributions.