How to extend the life of hydraulic shears? How to repair the secondary damaged hydraulic shears?

When buying, many people only care about the price, but ignore the product quality and service life and the later service of the product. Because of incorrect understanding, it is possible that the hydraulic shears they bought may not meet their own requirements and years of use. So when you buy it back, you should do the following maintenance:

How to extend the life of hydraulic shears? How to repair the secondary damaged CNC shears?

Hydraulic shears

(1) Hydraulic shears must maintain proper viscosity. Viscosity is the size of the frictional resistance between molecules when the oil flows. When the viscosity is too high, it will increase the conveying resistance in the pipeline, the energy loss will increase during the working process, the main engine no-load loss will increase, the temperature rise is fast and the working temperature is high, “cavitation” may appear at the oil suction end of the main pump; If the viscosity of the hydraulic oil is too small, it will not ensure good lubrication conditions for the shearing machine, which will aggravate the wear of the shearing machine hydraulic system components and increase system leakage, which will cause the volumetric efficiency of the oil pump to decrease. The specific use depends on the working pressure of the shear hydraulic system, the 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.

(2) The hydraulic oil of the hydraulic shearing machine must have good abrasion resistance and lubricity. The purpose is to reduce mechanical friction and ensure the service life of the shear hydraulic system.

(3) The hydraulic oil of hydraulic shears has good viscosity and temperature. Viscosity temperature refers to the degree to which the oil viscosity rises and falls with temperature, usually expressed by the viscosity index. The greater the viscosity index, the smaller the oil viscosity decreases with the increase in temperature during the work of the shear hydraulic system, so that the internal leakage of the hydraulic system will not be too large. ) The working conditions of the shearing machine hydraulic system are generally harsh. The temperature of the hydraulic oil varies with the load and ambient temperature during the operation, and the viscosity index is generally not less than 90.

(4) Hydraulic shear oil has good oxidation stability. Antioxidant stability refers to the ability of 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.

Anhui Yongya feels that hydraulic shears must be kept clean frequently, and the unpainted parts of the anti-rust grease must be maintained in order to extend the service life of the hydraulic shears.

What should I do if the CNC shearing machine is damaged twice during maintenance?

With the rapid economic development, especially the recovery of the machinery manufacturing industry, the number of hydraulic shears is increasing. Its repair and maintenance have become a hot spot for users. However, the early production of hydraulic shears has reached the end of its useful life, and the numerical control system is aging. Many early CNC systems are no longer in production, and it is difficult to maintain and repair the plate shearing machine. Hydraulic shears involve knowledge in many fields such as mechanics, electrical, hydraulics, pneumatics, optics, and computer technology. In particular, the repair of hydraulic shears involves fault diagnosis, condition monitoring, digital testing and other related technologies. Therefore, its maintenance is theoretically, Compared with ordinary equipment, methods and means are very different. In addition, the users of hydraulic shears are diverse and lack a certain understanding of the maintenance and maintenance of the working conditions of the shears, which makes the shears frequent failures during use.

Due to the lack of professional personnel for CNC equipment maintenance, existing maintenance personnel do not have enough professional knowledge. When performing maintenance operations on the shearing machine, the software and hardware settings of the shearing machine are changed or improper operation methods are used, which makes the shearing machine different. Improper matching between modules may even cause damage to the hardware equipment, causing secondary damage to the hydraulic shears.

The reasonable maintenance level of hydraulic shears is the main method to prevent the secondary damage of hydraulic shears. For example, the hydraulic shearing machine maintenance is divided into mechanical structure maintenance, numerical control system peripheral equipment maintenance, numerical control system module-level maintenance and numerical control system circuit board component-level maintenance, and the scope of responsibility of related maintenance personnel is formulated. For example, the maintenance of peripheral equipment is limited to the operation of auxiliary parts such as limit switches, buttons, sensors, connecting cables and connectors. In addition, regular preventive maintenance for each maintenance level is also an effective means to prevent hydraulic shears from malfunctioning.

As far as the specific maintenance process of hydraulic shears is concerned, the maintenance personnel should strictly follow the maintenance regulations. Should choose the appropriate maintenance tools, maintenance site and clothing, etc., to prevent all kinds of damage caused by static electricity and tools. During the maintenance process, attention should be paid to maintaining maintenance records, recording various switching conditions, jumpers, etc. before maintenance. Once the maintenance fails, restore the original system state as much as possible. The object to be repaired must be fully in charge of its working principle and device characteristics, and draw relevant drawings. Wiring should be standardized during the maintenance process, and detailed instructions should be written after maintenance, which should be archived and kept properly.