Press (including punching machine, hydraulic press) is a kind of compactness of general press. Has a wide range of USES, production efficiency is high, the press can be widely used in cutting, punching, blanking, bending, riveting and forming process. Through the metal parts is strong pressure in the metal plastic deformation and fracture to processed into parts. Mechanical press is working by the motor through v-belt drive big pulley (usually as a flywheel), after a gear pair and clutch drive the slider-crank mechanism, make the slider and punch line downward. Mechanical press in forging work after the completion of the slider range upward, clutch release automatically, automatic device connected on the crank shaft at the same time, make the slider stops near the top dead center.