Hydraulic driving system of heavy-load and large-stroke high-speed punch
A technology of high-speed punching machines and drive systems, applied in presses, manufacturing tools, etc., can solve the problems of being unsuitable, the punching stroke is only a few millimeters, and limiting the application range of hydraulic high-speed punching machines, etc., to achieve full recovery and high integration.
Active Publication Date: 2016-02-03
OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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Problems solved by technology
[0003] However, due to the limitations of core power components such as high-frequency servo valves and high-speed switching valves, the punching force of existing hydraulic high-speed punching machines under the condition of 1000 times / minute high-frequency punching usually does not exceed 30 tons, and the punching stroke is only a few millimeters
Therefore, under the condition of high-frequency stamping, the existing hydraulic high-speed punching machines are only suitable for punching and punching of thin sheet metal, but cannot be applied to processing of thicker sheet metal and deep stamping with larger strokes, which seriously limits the hydraulic pressure. The scope of application of high-speed punch
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[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0022] This embodiment includes a differential hydraulic cylinder 1 , a switching valve 2 , an electro-mechanical converter 3 , a loading valve 4 , a filling valve 5 , an oil storage tank 6 and an overflow valve 7 .
[0023] The upper end of the differential hydraulic cylinder has a rodless chamber, which is connected to the oil storage tank through the filling valve and connected to the high-pressure oil source through the loading valve. There is a rod cavity in the middle and lower end of the differential hydraulic cylinder, and the diameter of the piston rod in the middle is smaller than the diameter of the piston rod in the lower end; during the fast forward process, the rod cavity in the middle is connected to the rod cavity in the lower end through the switching valve; The rod cavity is connected to the oil tank through the switching valve. The o...
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The invention discloses a hydraulic driving system of a heavy-load and large-stroke high-speed punch. The system consists of a differential hydraulic cylinder, an electro-mechanical converter, a changeover valve, a loading valve, a fluid filling valve, an oil storage oil tank and an overflow valve, signals sent by the electro-mechanical converter respectively control the fluid filling valve, the loading valve and the changeover valve to work in set states, and the differential hydraulic cylinder is enabled to finish fast advancing, punching and fast backing action according to a set time sequence. Through the reasonable matching and conversion of a hydraulic control loop, large-flow and low-power-consumption heavy-load and large-stroke high-speed punching is realized.
Description
technical field [0001] The invention relates to a hydraulic drive system of a heavy-duty large-stroke high-speed press. Background technique [0002] Hydraulic high-speed punching machine is the advanced basic processing equipment of modern manufacturing industry. Compared with traditional mechanical punching machine, it does not need flywheel, crank connecting rod, clutch and brake and other components. It has high punching frequency, adjustable punching stroke / pressure, and full stroke. The advantages of load stamping, wear self-compensation, overload self-protection, low vibration and noise, etc., are in line with the development trend of high-end punching machines with high speed, precision and flexibility. [0003] However, due to the limitations of core power components such as high-frequency servo valves and high-speed switching valves, the punching force of existing hydraulic high-speed punching machines under the high-frequency punching condition of 1000 times / minut...
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IPC IPC(8): B30B15/16
Inventor 丁凡宋伟刘硕蔡勇沈莹杰方辉
Owner OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV