Four-column press is a compact structure of the universal press. A versatile, high production efficiency, cut off the presses can be widely used, punching, blanking, bending, riveting and forming and other processes. metal blank by exerting strong pressure on the metal plastic deformation and fracture to be processed into parts. Mechanical press work, drive belt from the motor through a large pulley (usually doubles as a flywheel), driven through the gears and clutch slider-crank mechanism, the slide and punch straight down. Mechanical press in the forging process work is completed the slider up, the clutch automatically disengaged, and the crank shaft of the automatic switched on, the slide stop in the near TDC.