How to choose the hydraulic oil in the hydraulic shearing machine?

How to choose the hydraulic oil in the hydraulic shearing machine?

How to choose the hydraulic oil in the hydraulic shearing machine? CNC shearing machine cylinder fault processing?

CNC Shearing Machine

(1) Good anti-oxidation stability. Anti-oxidation stability refers to the low resistance to chemical reaction with oxygenates when the oil temperature rises. Practice has shown that for every 10°C increase in oil temperature, the chemical reaction speed is approximately doubled. The hydraulic oil of the shearing machine with good oxidation resistance and stability is not easy to be oxidized and deteriorated for a long time, which can ensure the normal circulation of the hydraulic oil.

(2) The hydraulic oil of the shearing machine must have good anti-wear and lubricating properties. The purpose is to reduce mechanical friction and ensure the service life of the shearing machine hydraulic system.

(3) Maintain proper viscosity, depending on the working pressure of the shear hydraulic system, working temperature and the movement speed of the actuator. High viscosity should be selected for high pressure and high temperature, and low viscosity for high speed movement.

(4) Shear resistance is good. In order to improve the viscosity index of the oil, high molecular polymers such as polymethacrylate and polyisobutylene are often added to the oil. These substances have long molecular chains and the oil flows through the hydraulic components. When the slit is subjected to great shearing, the molecular chain will be broken and the viscosity-temperature characteristics of the oil will decrease. The frequent reversing of the reversing valve and the throttling of the throttling element during the shearing machine operation require the hydraulic oil to have strong shear resistance.

(5) Good viscosity-temperature property. Viscosity-temperature property refers to the degree to which the oil viscosity rises and falls with temperature, which is usually expressed by the viscosity index.

Anhui Yongya CNC Shearing Machine Oil Cylinder Fault Treatment:

1. Insufficient oil supply of the hydraulic pump: Because the internal parts of the hydraulic pump are worn out, the volumetric efficiency of the pump will decrease and the load of the cylinder will increase. The increase in working pressure will increase the internal leakage. The increase in leakage will cause the pump to deliver to the cylinder at a speed of up to Less than the specified value.

2. The connection of the hydraulic cylinder and the load: If the connection of the load is not correct, the speed of the cylinder will slow down when it moves.

3. There is a problem in the structure of the hydraulic cylinder: the end face of the piston is closely attached to the end face of the cylinder tube, and the piston bearing area is not enough when starting, so the load cannot be pushed, causing the hydraulic shearing machine cylinder to slow down when it moves.

4. The overflow valve is faulty: if the overflow valve spool is stuck in the open position, a large amount of oil will overflow from the overflow valve back to the oil tank, which will reduce the flow into the cylinder and underspeed.