The study of spring-back of CK67 steel sheet in V-die and U-die bending processes

One of the most sensitive features of sheet metal forming processes is the elastic recovery during unloading, called spring-back, which leads to some geometric changes in the product. This phenomenon will affect bend angle and bend curvature, and can be influenced by various factors. In this research, the effects of significant parameters on spring-back in U-die and V-die bending of CK67 anisotropic steel sheet were studied by experiments and numerical simulations. Comparison between the experimental and the finite element simulation results were also performed.