Hydraulic control system for electric-hydraulic proportional numerical control bending machine

Abstract

The invention relates to a hydraulic control system for an electric-hydraulic proportional numerical control bending machine, in particular to hydraulic control system equipment provided with an electric-hydraulic proportional numerical control bending machine. In the hydraulic control system, the working port of a two-position four-way electromagnetic reversing valve is connected with a No. 1 replenishing valve and a No. 2 replenishing valve respectively; the working port of a three-position four-way electromagnetic reversing valve is communicated with one end of a damper; the working port of the three-position four-way electromagnetic reversing valve is communicated with the oil outlet of a support valve; the oil outlet of an electromagnetic shut-off valve is communicated with the oil inlet of a No. 2 one-way valve; the oil outlets of the No. 1 replenishing valve and the No. 2 replenishing valve are communicated with the plug cavities of a No. 1 oil cylinder and a No. 2 oil cylinder respectively; and the oil inlets of the No. 1 replenishing valve and the No. 2 replenishing valve are communicated with an oil tank respectively. The hydraulic control system has the advantages of simple structure, adoption of a proportional cartridge valve, small size, stable and reliable work, no leakage, high working efficiency, low equipment manufacturing cost, high integration degree and control of the pressure of a system via a computer, and is widely applied to hydraulic control systems of computer-controlled numerical control bending machines.

Description

technical field [0001] The invention relates to a hydraulic control system of an electro-hydraulic proportional numerical control bending machine, in particular to a hydraulic control system equipment of an electro-hydraulic proportional numerical control bending machine. Background technique [0002] At present, CNC bending machines are mainly used for sheet metal processing, which can automatically calculate the mechanical position according to the angle, reduce the difficulty of operation, and improve work efficiency. The existing CNC bending machine system mainly adopts the spool valve hydraulic control system equipment developed in the 1950s. The disadvantages are that the performance parameters of the spool valve hydraulic control system are low, the structure of the control part is complex, the failure rate is high, the leakage is serious, and the action is unstable. , large impact, large space occupation, and inconvenient maintenance; some of the hydraulic valve grou...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an electro-hydraulic proportional numerical control bending machine hydraulic control system, which uses a combination of proportional cartridge valves and integrated hydraulic control systems to control the control system of the numerical control bending machine and solve the problem of low precision of the bending machine , no safe operation protection, complex structure, high failure rate, serious leakage, unstable action, large impact, pressure cannot be controlled by computer, large space occupation, and inconvenient maintenance. The purpose of pressing, depressurizing and return process

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