Buffer device of four-column hydraulic press1

Buffer device of four-column hydraulic press

The four-column hydraulic press uses liquid as a medium for energy transfer. It is suitable for stretching, bending, blanking and cold extrusion of metal materials. It is also suitable for calibration, press-fitting, powder products, abrasive products, press molding and plastic products. Insulation Press molding of materials, etc., since there is energy, there must be a matching buffer device to ensure stable operation.

1. The four-column hydraulic press adopts a gap-type buffer device, which generates a large buffer braking force at the beginning of the buffer, but it will drop down quickly, which does not work at all, the buffer effect is poor, and the buffer pressure cannot be adjusted. The biggest advantage is that the structure is simple , Generally, the gap buffer device is mostly used in the finished hydraulic cylinder.

2. Adjustable buffer device, when the buffer plunger of the hydraulic press enters the inner hole of the cylinder head, the plunger blocks the oil return port, and the buffer pressure in the oil return cavity of the throttle valve increases, the piston decelerates, and the buffer effect is very poor. When the piston moves in the opposite direction, the pressure oil quickly enters the hydraulic cylinder through the one-way valve, and the piston will not start slowly due to insufficient thrust. The adjustable buffer device can adjust the opening of the throttle valve according to the load situation. , change the size of the buffer pressure, so the hydraulic press is widely used.

3. Variable throttling buffer device, there is a triangular throttling groove on the buffer plunger of the four-column hydraulic press, the throttling area gradually decreases with the increase of the buffer stroke, and the throttling can be automatically changed during the buffering process. Therefore, the buffering effect is uniform and the impact pressure is small. The disadvantage is that the structure is more complicated. WORLD Press Machine official website www.pressmachine-world.com, please indicate the source for reprinting!

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