Abstract
Press shaving is removing the rollover and fractured surface on cut surface obtained by shearing. It is known that the rollover will be reduced when using negative clearance in punching. Therefore, the rollover can be reduced by shaving after half punching with negative clearance. However, smooth surface is also reduced. In this study, the shaving using the protrusion punch after half punching with negative clearance was carried out to increase the smooth surface. The smooth surface obtained by shaving using protrusion punch after half punching with negative clearance is larger than that obtained by shaving after half punching with negative clearance. Moreover, rollover obtained by shaving using protrusion punch after half punching with negative clearance is smaller than that obtained by conventional punching and conventional shaving.
