Hydraulic machine is the use of hydraulic pressure processing equipment, can be used to complete all kinds of forging and pressing forming process. For example, steel forging, molding metal parts, plastic and rubber products by pressing. Hydraulic machine is one of the earliest applications of hydraulic transmission, the current hydraulic transmission has become the main form of pressure processing machinery. In heavy machinery manufacturing, aviation industry, plastics and non-ferrous metal processing industry and so on, the hydraulic machine has become an important equipment.

Hydraulic pressure transmission system is based on the pressure, the system pressure, flow, power. Therefore, special attention should be paid to improve the utilization rate of the original motive power and to prevent the shock and vibration, and ensure the safety and reliability.

Hydraulic machine according to the suppression process requirements of the main cylinder can complete the fast downward a deceleration repression a voltage delay a pressure relief return a stop (any position) of the basic cycle of work and pressure, speed and holding pressure time required to adjust. Hydraulic cylinder top out of the top of the workpiece, the requirements to achieve the top out, return, stop the action. Such as thin plate stretching, it is required to top out of hydraulic cylinder, stop and pressure return and other auxiliary action. Sometimes it is necessary to press the blank holder to prevent the surrounding wrinkles.

Hydraulic machine to the main movement in the main body of the main body (master cylinder) may output the maximum pressure (tonnage) as the main hydraulic machine specifications, and has been series. The tonnage of the top material cylinder is often used for 50% of the 20% of the main cylinder. The top of the extruder can be used in the l0% of the main tonnage. Double acting hydraulic press cylinder tonnage, the general use of the tensile cylinder tonnage of about 60%.

By pressure process needs to determine the speed of the master cylinder, generally in the direct fuel injection pump in the hydraulic system, the working stroke speed not more than 50 mm / s, fast forward speed does not exceed 300 mm / s, rewind and fast forward speeds are equal.