Independent quick drive hydraulic system of hydraulic cushion of large-table-board hydraulic sheet metal drawing press

Abstract

The invention relates to an independent quick drive hydraulic system of a hydraulic cushion of a large-table-board hydraulic sheet metal drawing press. The independent quick drive hydraulic system comprises an oil pump motor set, a system pressure regulating valve, a peripheral cylinder oil inlet valve, a one-way valve for connecting a quick jacking cylinder with peripheral cylinders, a quick jacking cylinder oil inlet valve, an ejection pressure regulating valve, a quick jacking cylinder two-stage supporting valve, an oil cylinder upper cavity oil outlet valve, an oil cylinder upper cavity oil inlet valve, an oil cylinder upper cavity oil suction valve and a prefill valve. An outlet of the oil pump motor set is connected with a quick jacking oil inlet pipe through an oil inlet pipe, the quick jacking oil inlet pipe is connected with an oil port in the lower end of a hydraulic cushion cylinder, an oil port in the upper end of the hydraulic cushion cylinder is connected with an oil return port of an oil tank through an oil return pipe, the oil inlet pipe is provided with the oil return pipe through a system pressure relief valve, the peripheral cylinders on the two sides of the hydraulic cushion cylinder are connected with the oil tank through a pipe, and the pipe is provided with the prefill valve. The independent quick drive hydraulic system has the advantages that design is ingenious, use is convenient, master cylinder and jacking cylinder oil paths are separately controlled, efficiency is improved, the fault rate caused during oil way unifying is reduced, and the hydraulic cushion is higher in operation speed and more sable in operation.

Description

technical field [0001] The invention relates to a hydraulic system of a hydraulic cushion of a hydraulic press, in particular to an independent fast-driving hydraulic system of a hydraulic cushion of a large-table sheet stretching hydraulic press. Background technique [0002] The hydraulic cushion system of a traditional hydraulic press shares the oil pump with the main cylinder, and the main cylinder starts to eject when it returns to the top, and the work efficiency is relatively slow. This system adopts an independent drive. The master cylinder is synchronized, and the system adds a quick ejection function. Contents of the invention [0003] The present invention is a hydraulic cushion independently and rapidly driven hydraulic system of a large thin plate stretching hydraulic machine. The system is composed of a hydraulic oil pump motor unit, a special hydraulic valve group, multiple ejection cylinders, a liquid filling valve and a liquid filling oil tank. [0004] T...

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Problems solved by technology

[0002] The hydraulic pad system of traditional hydraulic press shares the oil pump with the main oil cylinder, and the main oil cylinder starts to eject when it returns to the top, and the work efficiency is relatively slow. The system adopts an independent drive. Master cylinder synchronization, the system adds a quick ejection function

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