The action of CNC shearing machine is realized by a hydraulic valve, the role of the hydraulic valve is to control the action of CNC shearing machine, such as stop, press down, lift.
The hydraulic valve is an automatic component operated by pressure oil. It is controlled by pressure oil of the distribution valve. It is usually used in combination with an electromagnetic distribution valve. The hydraulic valve of the numerical control plate shearing machine is used to reduce and stabilize the oil pressure of a branch in the system.
Principle of hydraulic valve of numerical control plate shearing machine collector valve ACTS contrary to the distributary valve so that the flow into the collector valve is distributed in proportion. The speed regulating valve can keep the inlet and outlet pressure difference of the throttle valve constant when the load pressure changes. In this way, after the orifice area is adjusted, no matter how the load pressure changes, the speed regulating valve can keep the flow through the throttle valve unchanged so that the speed of the actuator is stable. Shunting collector valve both shunting valve and collector valve two functions.
According to the purpose, it is divided into relief valve, reducing valve and sequence valve.
(1) overflow valve: it can control the hydraulic system to maintain a constant state when the pressure is adjusted.
The overflow valve for overload protection is called the relief valve. When the system fails and the pressure rises to the limit of possible damage, the valve port will open and overflow to ensure the safety of the system.
(2) pressure reducing valve: it can control the branch circuit to obtain the stable pressure lower than the oil pressure of the main circuit.
Pressure relief valve according to its control of the pressure function is different and can be divided into fixed value pressure relief valve (output pressure is a constant value), fixed pressure relief valve (input and output pressure difference is a fixed value) and fixed ratio pressure relief valve (input and output pressure to maintain a certain proportion).
(3) sequence valve: can make an executive component (such as hydraulic cylinder, hydraulic motor, etc.) action, then to make other executive components action. The pressure generated by the oil pump first pushes the hydraulic cylinder 1 to move, and at the same time ACTS on area A through the oil inlet of the sequence valve. When the hydraulic cylinder 1 moves completely, the pressure rises. After the upward thrust of the hydraulic cylinder A is greater than the adjusted value of the spring, the valve core rises to make the oil inlet and the oil outlet communicate, making the hydraulic cylinder 2 moves.