Finite element simulation of the punch with inclined edge in the sheet metal blanking process (Q2224299)

Summary: Finite element (FE) simulation has been performed to investigate the three new punches with inclined edges in the sheet metal blanking process. In this paper, three punches with single inclined edge, double convex inclined edges and double concave inclined edges, respectively, are proposed. The effects of three types of punches and different inclined edge angles on maximum blanking force, die roll width, die roll depth, burnish zone and fracture zone have been investigated and compared by finite element method (FEM). The modified Cockcroft and Latham expression is used as ductile fracture criterion and linked with the simulation. The simulation results indicate the maximum blanking forces of punches with inclined edges is smaller than that of the punch with flat edge, while the blanking process using flat edge punch could obtain better quality of the blanked surface than using the punches with inclined edge.