Water press large-pressure instant load-missing control method
A control method and technology of hydraulic press, which are applied in the direction of electric fluid pressure control, metal processing equipment, etc., to achieve smooth unloading, improve production efficiency and reduce severe impact.
Active Publication Date: 2009-11-18
CHINA FIRST HEAVY IND +1
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Problems solved by technology
[0003] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to study and design a novel method for controlling the instantaneous loss of load of the large pressure of the hydraulic press, so as to solve the problem caused by the instantaneous loss of load of the hydraulic press at the moment when the punching is completed. Road) and the impact of the host, as well as to improve product quality and other issues
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[0013] The specific embodiment of the present invention is shown in the accompanying drawings. The hydraulic press includes a main working cylinder 5, a main working cylinder control valve 3, a movable beam 7, a return cylinder 6, a return cylinder low-pressure water control valve 9, and a return cylinder high-pressure water control valve. It is composed of valve 10, programmable controller 1, executive control element 2, displacement sensor 8 and pipelines. The method for controlling the instantaneous loss of load at high pressure of the hydraulic press is the hydraulic cushion method, which controls the return cylinder 6 to connect to high-pressure water when the hydraulic press loses the load instantaneously at high pressure, so that the return cylinder 6 and the pipeline form a hydraulic cushion to cushion the movable beam 7 , pressure relief, absorption of residual energy. Specific steps are as follows:
[0014] A. When punching starts, cut off the low-pressure water con...
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The method for controlling instantaneous loss of load of a hydraulic press under high pressure according to the present invention relates to extra-large free forging hydraulic press equipment. The hydraulic press includes a main working cylinder, a main working cylinder control valve, a movable beam, a return cylinder, a low-pressure water control valve for the return cylinder, a high-pressure water control valve for the return cylinder, a programmable controller, an executive control element, a displacement sensor and pipelines, etc. composition. The method for controlling the instantaneous loss of load at high pressure of the hydraulic press is the hydraulic cushion method, which is to control the return cylinder to connect to high-pressure water when the high pressure of the hydraulic press is instantaneously lost, and use the compressibility of water to make the return cylinder and the pipeline form a hydraulic cushion. Buffer, relieve pressure and absorb residual energy on the movable beam to realize smooth unloading. The invention effectively eliminates the violent vibration of the press and the pipeline when the punching is completed, improves the precision of punching out the hole of the forging, basically does not need oxygen blowing treatment for the burrs, and can directly enter the forging for drawing, extending and expanding holes, which saves energy and improves production. efficiency.
Description
technical field [0001] The method for controlling instantaneous loss of load of a hydraulic press under high pressure according to the present invention relates to extra-large free forging hydraulic press equipment. Background technique [0002] Punching is one of the forging processes of cylindrical parts. At present, under the traditional hydraulic press, due to the inability to effectively control the forging punching process, at the moment when the punching is completed, the hydraulic press is suddenly unloaded to cause an impact, and the press and the pipeline generate strong vibration, which affects the life and reliability of the hydraulic press. At the same time, burrs are generated on the edge of the hole, which must be treated by oxygen blowing. This process lowers the temperature of the forging, which needs to be returned to the furnace for reheating, increasing the number of fires, resulting in low production efficiency and increased energy consumption. In view...
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IPC IPC(8): B21J5/10G05D16/20
Inventor 吴生富刘林峰王光儒杨庆光
Owner CHINA FIRST HEAVY IND