Punched metal parts are used in many industries. Punching is particularly suitable as a manufacturing method when a large number of recurring metal parts are required. Metals that are otherwise difficult to machine can also be processed.
Due to the strength of the metal sheet, large forces must be applied during punching. For this purpose, either hydraulic presses or mechanical eccentric presses are used as punching machines.
The operation of metal punching is similar to that of a paper punch: from above, the punch is guided onto the sheet or metal part, which is then pressed into a recess that has the negative shape of the punch (die). In addition to cutting, materials can also be formed into a new shape by punching, drawing, bending and upsetting using a cold forming process.