Reasonable method for shock absorption of four-column hydraulic press

Reasonable method for shock absorption of four-column hydraulic press

When using a four-column hydraulic press, there will always be a rectification. Shanghai WORLD Press Machine has also tried many methods for the four-column hydraulic press shock absorption, and found a suitable way and obtained effective results.

One is to thicken the backing plate on the working table of the four-column hydraulic press. Everyone knows that the main reason for the vibration of the four-column hydraulic press is the sudden release of the large energy stored in the liquid in the working cylinder. Therefore, the way to solve this problem is to try to reduce the storage capacity of the elastic compressive energy of the liquid in the working cylinder.

Therefore, a backing plate of a certain thickness is added between the working table of the four-column hydraulic press and the lower die, so that the working stroke of the moving beam can be moved upward, thereby reducing the volume of the upper cavity of the working cylinder when the load is suddenly lost, and correspondingly reducing the amount of Stored liquid elastic energy.

The second is to make the working cylinder and plunger of the four-column hydraulic machine adopt the tandem plunger hydraulic machine to be divided into upper and lower sections. When the idle stroke is downward, the upper and lower plungers will descend together with the moving beam; Closed, but the upper chamber of the lower cylinder enters the pressure oil and the lower chamber discharges the oil, pushing the plunger and the moving beam to press down together.

When the material breaks and suddenly loses load, the upper cylinder plunger remains stationary, only the lower chamber plunger may produce downward impact, but since the lower cylinder only needs to meet the requirements of cutting the material, the plunger stroke does not need to be large, The volume of the upper chamber of the cylinder can also be relatively small, so the stored elastic energy of the liquid is relatively small, and the impact vibration is correspondingly reduced.

The third is to add a one-way throttle valve to the hydraulic control oil circuit of the hydraulic control one-way valve of the four-column hydraulic press. The opening time of the main valve of the hydraulic control check valve is extended. First, the small unloading valve on the main spool is opened, and then the main valve is opened. WORLD Press Machine official website www.pressmachine-world.com, please indicate the source for reprinting!

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