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Adaptive liquid flushing system for high-speed arc discharge machining

An arc discharge and self-adaptive technology, applied in electric processing equipment, metal processing equipment, circuits, etc., can solve the problems of inability to self-adaptively adjust fluid medium parameters, complex control parameter setting process, and huge proportional control system

Active Publication Date: 2017-11-07
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this system is that each nozzle is connected to a proportional valve, resulting in a large proportional control system and complicated setting process of control parameters, and the system is an open-loop system, which cannot adaptively adjust the fluid medium parameters according to the processing status

Method used

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  • Adaptive liquid flushing system for high-speed arc discharge machining

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Embodiment 1

[0032] This embodiment illustrates the implementation method of the self-adaptive flushing system in the process of high-speed arc discharge layer milling, and the control unit 7 adopts the artificial neural network algorithm to realize self-adaptive adjustment. Firstly, the trend of the change process of each state quantity in the process of layer milling is explained: during the feeding process in which the feeding direction is parallel to the cutter axis, since the opening electrode 6 and the workpiece 9 are constantly approaching, the back pressure of the flushing pipe starts to increase at this time Large, the discharge current gradually increases and is accompanied by liquid dielectric breakdown discharge, and the open circuit voltage decreases; after the workpiece electrode is fed into the workpiece, due to various factors such as chip removal efficiency and feed rate, the discharge state changes. If it cannot be eliminated in time, the state will deteriorate, the back p...

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Abstract

The invention discloses a high-speed arc discharge machining self-adaption fluid flushing system. The system comprises a fluid storage tank, a fluid flushing unit, an electro-hydraulic control valve, a fluid parameter detection sensor, a discharge parameter detection sensor, a tapping electrode and a control unit, wherein fluid medium in the fluid storage tank sequentially penetrates through the fluid flushing unit and the electro-hydraulic control valve and is sent to the tapping electrode, and flushes to a workpiece through an internal hole of the tapping electrode, thus breakdown and machining of the arc discharge medium are realized and the medium finally flows back to the fluid storage tank. The system has sensing and detection functions, is capable of real-timely detecting the state of the fluid medium and the discharge state of the tapping electrode and the workpiece, is capable of communicating with a digital control system of a machine tool and reading processing parameters such as feeding speed, is used for controlling high-speed arc discharge machining self-adaption closed-loop flushing fluid and is capable of optimizing machining efficiency and quality of machined surfaces.

Description

technical field [0001] The invention belongs to the technical field of electrical discharge machining, and in particular relates to an adaptive flushing system for high-speed arc electrical discharge machining. Background technique [0002] High-speed arc discharge uses the discharge between the workpiece and the tool electrode to form an arc plasma, supplemented by high-pressure fluid to wash away the molten workpiece material, and realizes the efficient removal of various difficult-to-cut metal materials. Fluid flushing is very important in high-speed arc discharge machining. The workpiece material is melted after being heated by the arc plasma instantaneously. If the gap between the electrode and the workpiece is not removed, it will cause a short circuit and make the processing impossible. Therefore, opening an inner hole on the electrode of the drilling tool and passing high-pressure fluid can provide a discharge medium for the arc discharge on the one hand, and on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H1/10
CPCB23H1/02B23H1/10
Inventor 陈吉朋顾琳赵万生
Owner SHANGHAI JIAOTONG UNIV
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