The grinding wheel workpieces produced by our factory are all pressed and formed on the hydraulic press. Due to the influence of sand dust and the frequent use of hydraulic presses, some minor faults often occur. First, can not be underestimated filter mesh self-made 1000kN hydraulic press in the active horizontal movement, found that the movement is unbalanced one by one, the down is very obvious, the pressing wheel blanks have gas weakness, the indenter rebound phenomenon, the blank pressure Not up to size. At the same time, the oil pump is slightly discolored after the start of the oil pump, and the turbulence phenomenon is disturbed.