How to deal with the noise of the overflow valve in the four-column hydraulic press

1. The error between the spool valve of the four-column hydraulic press and the roundness of the valve body hole is too large or the gap is too large, which is also easy to cause leakage. Grind the valve body hole, reconfigure the spool valve, and make each precision meet certain technical requirements.

2. The gap between the slide valve and the valve body hole is too small, and the slide valve is not flexible enough to move. Grind the spool valve or grind and match the valve body hole, and control the clearance within the required range.

3. The pressure regulating spring is bent and deformed and needs to be replaced.

5. Poor contact between the pilot valve and the valve seat hole. The surface is rough and the roundness error is large, which makes the force of the pressure regulating spring unbalanced, and the vibration of the cone valve is intensified, resulting in a scream. Grind the valve seat hole, control the error of the oil seal roundness between 0.005~0.01mm, and the surface roughness Ra~0.8μm. When grinding the cone valve, its surface roughness should reach 0.4μm.

6. The vertical error between the axis line and the end face of the pilot valve spring of the four-column hydraulic press makes the poppet valve inclined and the contact with the valve seat is uneven. Replace the spring whose end face is ground and perpendicular to the axis to prevent the poppet valve from tipping.

7. The hydraulic pump of the four-column hydraulic press has poor oil intake and insufficient oil supply. Remove the dirt from the filter at the oil inlet and appropriately increase the oil inlet area.

8. The valve return pipe circuit is not smooth. Adjust the height of the oil return pipe, which should be more than 50mm from the bottom of the oil tank. This article is from the official website of the manufacturer WORLD Press Machine www.pressmachine-world.com, please indicate the source for reprinting!