Introduction of buffering equipment for four-column hydraulic press

Four-column hydraulic press is the use of liquid as a medium for energy transfer, suitable for metal material stretching, bending, punching and cold extrusion and other processes. So how is the buffering equipment of the four-column hydraulic press buffered? Let's take a look at the introduction of four-column hydraulic press buffer equipment.

One, four column hydraulic press use gap buffer equipment, at the beginning of the buffer braking force, but it will soon fall, it does not play a role, the buffer effect is poor, and the buffer pressure can not be adjusted, the advantage is that the structure is simple, the general products in the hydraulic cylinder use more gap buffer equipment.

Second, adjustable buffer equipment, when the hydraulic buffer plunger enters the inner hole of the cylinder head, the plunger blocks the oil return port, the buffer pressure in the oil return chamber of the saving valve increases the piston deceleration, the buffer effect is very poor, when the piston reverses the movement of the pressure oil through the check valve quickly into the hydraulic cylinder, the piston will not start slowly due to insufficient thrust. Adjustable buffer equipment can adjust the size of the opening of the saving valve according to the load situation, and change the size of the buffer pressure, so the application scale of the hydraulic press is more extensive.

Third, variable saving buffer equipment, in the four-column hydraulic press buffer plunger is opened with a triangular saving groove, saving area with the increase of buffer stroke and gradually reduced, in the buffering process can actively change the size of the saving port, so the buffering effect uniform impact pressure is small, the defect is more complex structure.