Common causes and troubleshooting methods of hydraulic press failures

2025,03,24

1. Failure of movement

It may be caused by loose or wrong electrical wiring. Check the electrical connection and repair it.

2. Slider creeping

The possible reasons are air accumulation in the system or pump suction, improper precision adjustment or lack of oil in the column. When troubleshooting, first check whether the pump suction pipe is inhaled, then move up and down several times and pressurize; then add oil to the column and readjust the precision.

3. The slider is under pressure when it moves slowly downward

It is mainly caused by excessive support force. By adjusting the back pressure valve + to make the upper chamber of the upper cylinder without pressure, the maximum is not more than 1MPa.

4. The slider slides down seriously after parking

The possible reasons are leakage of the cylinder mouth sealing ring +, too small pressure adjustment of the pressure valve or loose pressure mouth. When inspecting, first observe the cylinder mouth, find oil leakage and deflate, and then adjust the pressure to check the valve mouth.

5. The pressure gauge pointer swings violently

Air in the pressure gauge oil circuit, mechanical vibration of the pipeline, and damage to the pressure gauge may all cause this situation. The maintenance methods are: slightly loosen the pipe joint when pressing, release the air; clamp the pipeline; replace the pressure gauge.

6. The high-pressure stroke speed is not enough, and the pressure is slow to rise.

The possible reasons are that the high-pressure pump flow is adjusted too small, the pump is worn or burned, or the system has serious internal leakage. During maintenance, adjust according to the pump manual. The pump eccentricity can be adjusted to 5 grids at 25MPa; if the pump oil return port leaks a lot, it should be removed for inspection.

7. The pressure drop is too fast during pressure maintenance.

The valves involved in pressure maintenance are not tight or the pipeline leaks oil. This situation may be caused by the damage of the sealing ring in the cylinder. It is also one of the reasons for the failure. During maintenance, first check the filling valve to see the sealing condition of the pressure relief valve. If it is not a failure here, replace the sealing ring.

Dongguan Shengshi Weiye Machinery Technology Co.The main equipment produced are: Liquid Die Forging Machine, low-pressure Casting Machine, Gravity Casting Machine, cold forging machine, hot forging machine, etc

Author:

Ms. Hu

E-mail:

dgliheng168@163.com

Phone/WhatsApp:

+86 13509684273