What are the damping methods of the four-column Hydraulic Press:
Thicken the backing plate on the stage: Everyone knows that the important reason for the vibration of the four-column hydraulic press is the sudden release of the larger energy stored in the liquid in the cylinder. Therefore, the objective way to deal with this problem is to eliminate the idea of the storage capacity of the elastic compressive energy of the liquid in the cylinder. The above is to add a backing plate of certain thickness between the working table of the four-column hydraulic press and the lower mold to make the working stroke of the moving beam move up, thereby eliminating it. When the load is suddenly lost, the volume of the upper cavity of the working cylinder is correspondingly eliminated. Elastic energy.
The working cylinder and the plunger of the tandem plunger hydraulic press are divided into two upper and lower sections. When the idle stroke is down, the upper and lower plungers and the moving beam will land together. The cavity enters the pressure oil and the lower cavity drains the oil, pushing the plunger and the moving beam down together. When the material breaks and suddenly loses the load, the upper cylinder plunger does not move, only the lower cavity plunger probably produces a downward blow, but because The lower cylinder only needs to meet the requirements of blocking the material, the plunger stroke does not need to be large, and the volume of the upper cavity of the lower cylinder can also be relatively small, so the stored liquid elastic energy is also relatively small, and the shock vibration is eliminated accordingly.
Add a one-way saving valve to the hydraulic control oil circuit of the hydraulic control one-way valve of a four-column hydraulic machine. After adjusting the saving valve, control the gap of the hydraulic control flow to reduce the movement rate of the control piston, which extends the hydraulic control one-way When the hole of the main valve of the valve is opened, the small unloading valve on the main spool is first opened, and then the main valve is opened. When the pressure is relieved, it can be extended, which can eliminate oscillation, blow and noise.
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