Investigation of the effect of high punch speeds on the sheared surface temperature and quality of AISI 304 stainless steel workpiece by finite element method

Abstract

The main goal of the blanking process is to shear the sheet metal with minimum energy consumption and to obtain a good surface quality on the sheared workpiece. The punch speed is one of the important process parameters which have effect on both surface quality and energy consumption. In this study, a 2 mm thick AISI 304 stainless steel sheet was blanked under a constant clearance value (5% of sheet thickness) and three different blanking speeds (0.1 m/s, 1 m/s and 10 m/s). At the same time, modeling with finite element method was also performed. The effects of punch speed, cutting force, cutting energy and workpiece surface quality were investigated. As a result; it was observed that as a result of the resistance of AISI 304 stainless steel to deformation caused the material to strain harden more with increasing punch speed. But the general surface quality of the sheared material was improved which put forward that the thermal effects due to high strain rates had improving effects on the surface quality.