Single column hydraulic press presents vibration causes and solutions

Single column hydraulic press presents vibration causes and solutions
1. Sudden load loss: During blanking, punching, trimming and other processes, when the deformation resistance of the material is suddenly reduced due to cracking, it will cause shock and vibration of the moving beam frame and pipeline.
2. There is a sudden return after pressurization. After pressurization, the single column hydraulic press will store a certain amount of energy due to the elastic compression of the operating cylinder liquid under pressure and the elastic deformation of the frame, sliding beam, operating cylinder, mold, etc. due to stress. If the pressure is relieved too quickly during the return trip, this part of the energy will be suddenly released, which will also cause shock and vibration.
3. The sliding beam suddenly stops moving and the pipeline valve suddenly opens or closes; when the sliding beam stops moving, shock and vibration will be caused due to the inertial effect of the frame. When the pipeline valve is suddenly closed, the inertia of the liquid sliding in the pipeline will also cause impact vibration. When the pipeline valve is suddenly opened, due to the sudden flow of the liquid and the rapid change in speed, impact vibration will also be caused.
Single column hydraulic press vibration treatment solution
1. To minimize the energy stored in the single column hydraulic press cylinder when the single column hydraulic press suddenly loses load, a certain thickness of backing plate can be added between the single column hydraulic press workbench and the lower mold to move the working stroke upward. Add a certain movable pad between the working cylinder plunger and the sliding beam, and use a series plunger to reduce the amount of liquid in the upper chamber of the working chamber when the load is lost, so as to achieve the purpose of vibration reduction.
2. It hinders the release of energy. It can be seen from the blanking and punching deformation resistance curve that when the working stroke is approximately equal to 2/3 of the material thickness, the shear force reaches the maximum value. When the material cracks, the shear force quickly reduces to 0 , causing the single column hydraulic press to suddenly lose load, such as when the working stroke slightly exceeds 2/3 of the material thickness. Add a hydraulic pad to the lower part of the material to increase the resistance of the moving beam to lower, so that the single column hydraulic press will not suddenly lose load when the material breaks, thus reducing the impact vibration.
3. Reduce the volume of the upper chamber of the working cylinder during the return stroke to reduce the stored elasticity. On the other hand, it can also slow down the pressure relief speed of the upper chamber of the working cylinder to reduce impact vibration.
Vibration reduction measures when hydraulic shock occurs: Hydraulic shock is mostly caused by the inertia of moving parts or oil. Properly reducing the movement speed of moving parts before stopping and prolonging the opening and closing time of valves can reduce hydraulic shock.