Hydraulic System

Each oil circut is routed with two relief vaive to control pressure.the maximum set pressure for each oil circuit is 25 MPa. which is mainly to

control the main cylinder pressure. and the other relief valve is set to 16 MPa, mainly to control the overturning cylinder and balancing cylinder

pressure.In order to ensure the synchroni- zation accuracy of the main oil cylinders at both ends of each moving working roll,high-precision

displacement sensors are installed on the left and right racks and the tilting frames. Through the pressure sensors, the microcomputer control

system detects and adjusts the movements of the main oil cylinder pistons to achieve the precison of the both working roller ends.

Advantage of our hydraulic system:

a. The unique pre-discharge technology is adopted to effectively avoid hydraulic shock and improve the life of the pipeline and seals.

b. The hydraulic components are adopt Japan YUKEN and NO,K brand,hight qauality parts to ensure the stability of the hydraulic system.

c. Each input and output port of the hydraulic system is provided with correspondina detection points, which are convenient for maintenance

and fault checking. The oil pump adopts a lower mounted type and positive pressure oil absorption.

At the same time the filters, level gauges, and all transmitting devices can automatically warn of faults.

The machine is four roller plate bending machine, its structure shown as drawing, upper roller as initiative roller, down roller

and side rollers as driven rollers; upper roller is fixed, down roller does up and down movement; upper roller is mechanical

initiative, while down roller and side rollers are driven by friction from plate and rollers. Down roller and side rollers are

driven by hydraulic oil tank to do lifting movement.

Upper roller’s ventro-bearing overturn and reset are also driven by hydraulic oil tank. Rollers’ bearing and oil tank are

installed on left and right side of machine frame.