Simple hydraulic system for bending machine

Abstract

The invention relates to a simple hydraulic system for a bending machine. The simple hydraulic system comprises an axle plunger pump, a screen oil filter, an oil tank, a pilot operated check valve, a three-position four-way electromagnetic directional valve, a two-position two-way electromagnetic directional valve, a pressure gauge, a one-way throttle valve, two prefill valves, an overflow valve, two oil cylinders and a safety valve. The axial plunger pump is connected with a motor and further connected with the oil tank through the screen oil filter, and one way of the axial plunger pump is connected to the overflow valve while the other way of the axial plunger pump is connected to the three-position four-way electromagnetic directional valve. One operation port of the three-position four-way electromagnetic directional valve is connected with the safety valve and the pilot operated check valve for pressure maintaining and further connected with rod cavity of the two oil cylinders, rodless cavities of the two oil cylinders are connected with the prefill valves respectively, control oil circuits of the two prefill valves are connected with the two-position two-way electromagnetic directional valve and forms a loop with the other operation port of the three-position four-way electromagnetic directional valve. By the simple hydraulic system for the bending machine, an electrical control system of a mainframe is simplified, manufacturing cost of the mainframe is reduced, and convenience and simplicity in operation of the mainframe is achieved. In addition, the simple hydraulic system for the bending machine has the advantages of high efficiency and energy saving and has functions of pressure maintaining and overload protection.

Description

technical field [0001] The invention relates to a simple hydraulic system of a bending machine, in particular to a hydraulic system of a bending machine of 100 to 160 tons. Background technique [0002] There is nothing wrong with the existing hydraulic systems of various bending machines in terms of use effects, but the electromagnetic reversing valves used to control the oil cylinders are used too much, and there are many control lines, which make the electrical control system of the host machine more complicated. , the operation of the host is also relatively cumbersome, and also increases the cost of the host. Contents of the invention [0003] The invention is a simple hydraulic system of a bending machine, which solves the problems that the electrical control system and the operation of the main machine of the existing bending machine are relatively cumbersome and the cost of the main machine is high. [0004] The specific content of the present invention [0005] ...

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Problems solved by technology

[0003] The invention is a simple hydraulic system of a bending machine, which solves the problems that the electrical control system of the main machine and the operation of the main machine of the existing bending machine are relatively cumbersome and the cost of the main machine is relatively high

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