Hydraulic device for bending machine

A hydraulic device for a bending machine comprises a bending machine body (1). An oil tank (3) is mounted in the bending machine body (1). An oil pump is mounted in the oil tank (3). The oil pump is connected to a servo pump (2) by means of a two-way pipe. By means of a hydraulic pipe, the servo pump (2) is in two-way connection with hydraulic cylinders (4) disposed on two sides of the bending machine body (1). The control end of the servo pump (2) is connected to a control panel by means of a control box. A two-way pump is controlled by means of forward and reverse rotation of a servo motor, so as to change the direction of a liquid flow, a reversing valve is omitted, and resistance loss and pressure leakage loss of the reversing valve are reduced. The hydraulic device reduces no-load power consumption and the starting power, improves the service lives of sealing members, elements, and oil.