The press drives the working mechanism through the transmission mechanism of the motor to apply the process force to the workpiece. The transmission mechanism is a belt transmission and a gear transmission speed reduction mechanism; the working mechanism is divided into a screw mechanism, a crank linkage mechanism and a hydraulic cylinder.
The press is divided into three categories: screw press, crank press and hydraulic press. The crank press is also known as a mechanical press.
The screw press has no fixed bottom dead center. For larger die forging parts, it can be formed by multiple times, and it can be single, continuous and inching. The striking force is related to the amount of deformation of the workpiece. When the deformation is large, the striking force is small, and when the deformation is small (such as a cold blow), the striking force is large. In these respects, it is similar to a hammer. However, its striking force is closed by the frame, so the work is stable, the vibration is much smaller than the hammer, and does not require a large foundation.
The lower part of the press is equipped with a forging ejector. The screw press has the functions of forging and forging hammers, mechanical presses and other forging machines. It has strong versatility and can be used for die forging, blanking and deep drawing. In addition, the screw press has a simple structure and is easy to manufacture, so it is widely used.