This study aims to analyze the effects of angular U-bending process on the springback of metal sheets. Based on Updated Lagrangian Formulation (ULF), the 3D incremental elastic-plastic Finite Element Method was inferred to simulate the U-bending process of metal sheets. The die/blank holder profile with angles of alpha=-4 degrees, alpha=-2 degrees, alpha=0 degrees, alpha=2 degrees, alpha=4 degrees and die/punch profile with radiuses of R-p=R-d=6.0mm were analyzed to determine the influence of tool angles on the springback. With different tool angles to proceed the U-bending process of metal sheets, it is found that the larger or smaller die angles, the more springback magnitude. When perpendicular U-sheets are required, theta(1) of the U-sheet presents 90 degree on the tool angle alpha=-1.2 degrees and theta(2) shows 90 degrees on the tool angle alpha=-0.4 degrees. The aim of this study is to investigate the effects of angle variables on the springback in the U-bending process and to obtain useful data from the industrial field.
