Since the pressure in the chamber can be adjusted by the spring pre-adjustment force of the selector valve, the reaction force can be adjusted to be almost equal to the elastic deformation force of the frame. As a result, the flow of the valve is used to cause the frame to rebound only to the initial position. Position control relief valves are available for the purpose of thicker material stamping. At this point, the stroke of the punch requires a distance before the material reaches the break point. If there is no valve, a considerable amount of energy is wasted because the muffler will act on the reaction of the punch throughout the stroke.
After the material breaks, by immediately releasing the pressure in the cavity, the reaction force acting on the guide plate will drop sharply, and the energy waste will also drop sharply. Connected to the tank through a pipe. The line has a pressure relief valve and a position control relief valve. This is used to reduce the energy loss of a thick material after a break. Especially suitable for hydraulic line systems. The above-mentioned functions are not only applicable to the stamping or cutting machine shown above, but also to other machine tools having similar force-time characteristic curves. A reaction force, which acts on the secondary piston immediately before decompression, causes the fluid to flow out of the cavity through a valve that opens under a certain preload to achieve a slow release of force.
A closed chamber is enclosed by an outer casing, and the fluid in the chamber is pre-stressed by applying a force to a primary piston. This force is applied to the secondary piston prior to unloading of the pressurization and is designed to open the valve on the outflow line leading from the chamber at a certain chamber pressure. A control plate for applying a force to the piston is provided on the outflow line of the chamber to open the control pressure reducing valve when it is in a certain position.
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