After-sales maintenance of hydraulic presses is an important part of ensuring their stable operation and prolonging their service life. The following is a detailed guide to after-sales maintenance of hydraulic presses:
1. Routine maintenance
Check before work
Check whether the oil pool, oil level, oil label meets the specified standards.
Check whether the fastening connection of each part is reliable.
Check whether the button can be used correctly and there is no blocking card.
Check whether the grounding wire of the motor is connected properly, and whether there is any looseness or damage.
Check whether the safety protection measures are complete and reliable.
Observation during work
Comprehensively observe whether there is oil, water, air or electricity leakage.
Check the leakage of hydraulic cylinder.
Check whether the action state of the hydraulic cylinder is normal.
Listen to the sound when the hydraulic cylinder is running and check whether there is any abnormality.
Check the piston rod for scars and adhesion of contaminants.
Check the state of the hydraulic cylinder mounting parts for looseness, cracks, occlusion, and deformation.
Check after work
Check for loose screws that need to be tightened.
Replenish oil, water and other work.
Put the slider to the lowest position.
2. Regular maintenance
Oil replacement
It is recommended to use No.32 and No.46 anti-wear hydraulic oil, and the temperature of the oil used is within the range of 15~60 degrees Celsius.
The oil is strictly filtered before being allowed to join the tank.
The working fluid is replaced every year, of which the first replacement time should not exceed three months.
Lubrication and cleaning
The slider should be lubricated frequently.
The outer exposed surface of the column should be kept clean frequently, and the oil should be sprayed before each work.
Clean the oil pump and filter frequently.
Pressure gauge calibration
Calibrate and check the pressure gauge once every six months.
Secondary maintenance
The machine tool runs 5000 hours for secondary maintenance, with maintenance workers as the main, operating workers to participate.
Disassemble and clean, overhaul the solenoid valve, grinding valves, valve core.
Clean and check the oil pump cylinder plunger, trimming burrs, replacing oil seals.
Calibrate the pressure gauge.
Repair or replace the serious wear parts according to the actual situation.
Drive to check whether the cylinder, plunger running smoothly, no crawling.
3. Maintenance and troubleshooting
Common troubleshooting
Hydraulic cylinder external leakage: intuitively obvious, need to replace the seals in a timely manner.
Hydraulic cylinder internal leakage: the cylinder extends and extends the powerlessness, the closing action is uneven, need to replace the internal oil seal.
Hydraulic pump, drive motor pressure drop: check the engine power, hydraulic pump pressure and pressure safety valve, repair or replace worn parts.
Maintenance precautions
Make preparations before repair, including external cleaning, selecting a good site, etc..
Carefully identify the hydraulic machinery model number, divided into categories, not string.
Disassembly of the cylinder piston need to use special tools, is strictly prohibited with a hammer slamming.
The internal parts of the oil pump motor requires a very high degree of precision, in principle, after the damage is always replaced with a new assembly.
4. Maintenance records and tracking
Establishment of maintenance records
Each maintenance should be recorded in detail after the maintenance content, time, replacement parts and other information.
Tracking maintenance effect
Regularly check the maintenance records, analyse the operating conditions of the hydraulic press, timely detection and treatment of potential problems.
By following the above after-sales maintenance guidelines for hydraulic presses, you can ensure the stable operation of hydraulic presses, extend their service life, and reduce maintenance costs. At the same time, it also helps to improve production efficiency and ensure production safety.
