Electrohydraulic servo bending machine hydraulic system

A hydraulic system and electro-hydraulic servo technology, applied in servo motors, servo motor components, mechanical equipment, etc., can solve the problems of large hydraulic control valve group, low power density ratio, heavy weight, etc., to achieve convenient control and strong versatility Effect

Inactive Publication Date: 2012-04-11
NANJING ALPHA ELECTRO HYDRAULIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The entire hydraulic control valve group has a large mass and a low power density ratio. It belongs to the former Soviet Union format and is bulky and heavy.

Method used

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  • Electrohydraulic servo bending machine hydraulic system
  • Electrohydraulic servo bending machine hydraulic system
  • Electrohydraulic servo bending machine hydraulic system

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Embodiment Construction

[0014] The technology will be further described below in conjunction with the accompanying drawings.

[0015] see figure 1 As shown, the hydraulic control system consists of:

[0016] 1. Central control block (NC system): It integrates control modules such as system pressure control, oil cylinder synchronous control, and worktable deflection compensation.

[0017] 2. System pressure control: two-way cartridge valve 20, pressure valve 21, proportional pressure valve 22.

[0018] 3. Oil cylinder synchronous control: electromagnetic reversing valve 4.1, 4.2, back pressure valve 5.1, 5.2, lower cavity safety valve 8.1, 8.2, proportional servo valve 2., 2.2.

[0019] 4. In addition, there is an electromagnetic reversing valve 28 and a filling valve to control the filling valve. The A port of the electromagnetic reversing valve 28. If it is a normally closed liquid filling valve, its control port is connected to the B port of the electromagnetic reversing valve 28).

[0020] Pri...

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PUM

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Abstract

The invention provides an electrohydraulic servo bending machine hydraulic system which has a simple structure, convenience for speed control of an oil cylinder and strong generality. In the electrohydraulic servo bending machine hydraulic system, a liquid filling valve is connected between an oil tank and an upper cavity of the oil cylinder; an oil outlet of an oil pump is assembled with the oil tank through pressure control valves; a port P of a proportional servo valve is connected with the oil outlet of the oil pump; a port B is connected with a lower cavity of the oil cylinder through electromagnetic reversing valves; a port A is connected with the upper cavity of the oil cylinder; a port T is connected with the oil tank; the port P for controlling a control valve of the liquid filling valve is connected with the oil outlet of the oil pump; the port T is connected with the oil tank; and one of the port A and the port B is connected with a control oil port of the liquid filling valve, and the other port is closed.

Description

technical field [0001] This technology relates to a hydraulic control system of a bending machine, specifically, an electro-hydraulic servo synchronous hydraulic control system for a bending machine, especially suitable for an electro-hydraulic synchronous bending machine below 300T and with a short distance between hydraulic cylinders. It is extremely convenient for piping and piping, strong anti-eccentric load capability, high synchronization accuracy, low cost, and high power density ratio. Background technique [0002] At present, the principle of the hydraulic control system of the domestic electro-hydraulic servo synchronous bending machine is similar, and it has basically remained unchanged for decades. The hydraulic components all adopt the domestic common plate-mounted valve and the three-control block structure, which is relatively convenient to manufacture. The entire hydraulic control valve group has a large mass and a low power density ratio, which belongs to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B11/04
Inventor 余继军柳倩希陈华
Owner NANJING ALPHA ELECTRO HYDRAULIC TECH
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