Changing Forming Path of Sheets Metals via Different Punch Radii during Stretch Bending Forming Process

The new way of sheet forming process is combining two processes to improve the sheet forming application and make a complex design of sheet without any problems. The two processes are stretch and bending forming operations participating under title stretch bending process. Changing forming path is a new way to deform sheet using two stages of forming sheet processes to avoid the fracture forming way, and making improving the formability of sheet via selecting the high limit of forming strain. In this paper, the effect of punch radii on the formability for SS304, SS316 sheets have been calculated experimentally representing via stretch bending ratio which is used scale of sheet formability, also the impact of sheet width was employed to improving the effect this parameter in the formability of sheet metals.