Presses (including punch presses, hydraulic presses) are a compact, versatile press. With wide application and high production efficiency, the press can be widely used in cutting, punching, blanking, bending, riveting and forming processes. The metal is plastically deformed and broken by applying a strong pressure to the metal blank to form a part. When the mechanical press is working, the motor drives the large pulley (usually also acts as a flywheel) through the V-belt. The gear pair and the clutch drive the crank slider mechanism, so that the slider and the punch die downward. After the forging work is completed, the mechanical press presses up the slider, the clutch automatically disengages, and the automat on the crankshaft is turned on, so that the slider stops near the top dead center.