Stress Analysis and Numerical Simulation of Flange Straight Side in Deep Drawing Box-shaped Parts

Principal stress of the flange straight side was analyzed and deformation of the flange in the deep drawing of box-shaped parts was studied.The forming of box-shaped parts was simulated by DYNAFORM software.And the hardness of the box-shaped flange area was measured with a hardness tester.The results show that the sheet thickness near the midpoint of straight edge is more lager than near the corner,so plastic deformation is not sufficient;sheet thickness of box-shaped parts of large aspect ratio is relatively large,and sheet flow is difficult,which is not conducive to formation;the hardness of rounded corner part is significantly greater than two adjacent straight edges at the same height,which shows that material flow of the rounded corner part is good and hardening phenomenon is obvious,and the maximum hardness is near the entrance to the die corner.The results of experiment and numerical simulation for the flange deformation of box-shaped parts is the same.