maintenance
Common faults and maintenance methods of four-column hydraulic presses: often in the hydraulic transmission system, there are some relatively precise parts. Although people feel labor-saving and convenient for mechanical hydraulic transmission, they also feel that it is easy to damage. The main reason is that it is not very clear about its working principle and structural characteristics, and therefore does not know much about its preventive maintenance methods. There are three basic "disease" factors in hydraulic systems: pollution, overheating and air intake. These three unfavorable factors have a close internal relationship. Any one of them will cause another one or more problems. Practice has proved that 75% of the "pathogenic" causes of the four-column hydraulic system are caused by these three. 1. The working fluid is deteriorated by entering the dirt. 2. Overheating. 3. The solution is to enter the air. The cleaning and assembly of some major precision parts in the system should be carried out in a very clean room with a clean floor and airtightness. For doors and windows, the temperature is best kept at about 20°C.
Other common maintenance:
1. L-HL32/GB1118-89 hydraulic oil, N46/GB3141 can be used when the degree of universal N32/GB3141 is higher than 30 degrees.
The working oil is recommended to use No. 32 and No. 46 anti-wear hydraulic oil, and the oil temperature is within the range of 15-60 degrees Celsius.
2. The oil industry is allowed to enter the tank only after strict filtration.
3. The working fluid should be replaced once a year, and the first replacement time should not exceed three months;
4. The sliding block should be lubricated frequently, and the exposed surface of the column should be kept clean frequently, and lubricating oil should be sprayed before each work.
5. The maximum allowable eccentricity of the concentrated load is 40mm under the nominal pressure of 500T. Excessive eccentricity can easily cause the column to be strained or other undesirable phenomena.
6. Calibrate and check the pressure gauge every six months;
7. If the machine is out of service for a long time, the surface of each processing plant should be scrubbed clean and coated with anti-rust oil.