Punch

The design of the punch mainly depends upon the plan area to be blanked or pierced. Design of the punch also depends upon the pressure that is needed to penetrate by the workpiece. The technique of mounting the punch is determined through the plan area to be blanked or pierced. For instance, a punch for small workpiece may need a punch block for mounting the punch within the die holder, whereas a punch of large workpiece may be made up of solid block of tool steel and bolted to the punch holder. A punch must withstand the maximum blanking or piercing pressure. Little punches need a punch support to prevent breakage.

The primary category of punches can be summarised as plain punch, pedestal punch, perforated punch & punches mounted in punch plate.