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      Analysis and troubleshooting of common faults of CNC bending machine

      CREATE_TIME:2018-7-2 VIEWS:2838
       
      One, pump noise is too large (too fast heat), pump damage
       
      1. Air leakage in the oil pump suction pipeline or excessively low oil tank level causes oil pump suction
       
      2. Oil temperature is too low, oil viscosity is too large, resulting in oil absorption resistance
       
      3.The oil filter at the suction port is blocked and the oil is dirty
       
      4. Pump damage (pump installation injury) by any knocks
       
      5. Coupling installation problems, such as axial too tight, motor shaft and pump shaft different core
       
      6. After the installation of the pump, the test time is reversed or there is no refueling
       
      7. The outlet high-pressure oil filter is blocked or the flow rate is not up to standard
       
      8. The oil pump is empty (there is oil, but there is air at the oil inlet of the oil pump)
       
      9. If it is a plunger pump may be back to the oil inlet pipe height set too low
       
      10.HOEBIGER pumps may be vented
       

      11.The oil temperature is too high, results in the decrease of viscosity (60 ° C)

       
      12. Hydraulic oil contains water, which will lead to high pressure filter block damage
       
      二、No pressure or pressure to build up the system
       
      1. Wrong steering of oil pump or damaged oil pump
       
      2. Whether the pressure gauge is damaged
       
      3. Pressure control valve without electrical signal or valve plug
       
      4. Pressure cartridge valve blocked, stuck, can not seal oil
       
      5. Filling valve is stuck (slide block does not slow down)
       
      6. The compensation amplifier is set too low。
       
      7. Pressure can only reach a certain value, with a direct 24V method to determine whether there is a problem with the valve pump
       

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