Pipe bending machines are widely used in our life. Machine size is directly related to the main cylinder. The cylinder is bigger, the motor power will be bigger also. It is very difficult to use traditional rack and gear transmission. That will be also easy to damage the rack. However, if use the sprocket wheel, that will not have such a problem. Tthe main oil cylinder piston rod to pull out the corresponding position in the curved arm of the chain link chain, the other link piston rod joints, so that the piston can move forward to drive the bending arm of the movement.

Pipe bending machine is  generally subject to the largest diameter and the smallest bending radius of the comprehensive strength to represent its ability, and different specifications of pipe bending machine generally adopts the cylinder as its main executive body, so the ability and design of the hydraulic system is the main factor in the performance of pipe bending machine.

Now improved hydraulic system of pipe bending machine, change original single pump system to dual pump system, displacement of 25 mL / mL Lo dual pump for the system. Large pump based bending oil tank, by superposition of 12 pressure relief valve pressure, pump and stop through the middle of the valve to achieve the unloading. Small pump for other auxiliary cylinder oil supply, oil pump outlet of the electromagnetic relief valve 7 from the pressure and unloading. The clamp cylinder and the steering cylinder of the valve to the "Y" type of function of the valve 9, while the superposition of a liquid controlled one-way valve 10 to carry out the pressure, the pressure to protect the effect has been significantly improved. As the main oil cylinder and auxiliary cylinder loop mutual non intervention, so as long as the elbow is adjusted with the speed of the cylinder and the main cylinder of the speed of movement, you can bend a variety of specifications of the tube.