An Atmospheric Pressure Cooled Plasma Jet Electric Discharge Machining Device

A cold plasma and spark machining technology, applied in the field of machining and tools, can solve problems such as unreported, achieve the effect of low cost, improve the state between the poles, and accelerate the discharge

Inactive Publication Date: 2018-04-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, other auxiliary measures can be used to help remove the electro-corrosion products, but there is no report on this aspect so far

Method used

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  • An Atmospheric Pressure Cooled Plasma Jet Electric Discharge Machining Device
  • An Atmospheric Pressure Cooled Plasma Jet Electric Discharge Machining Device
  • An Atmospheric Pressure Cooled Plasma Jet Electric Discharge Machining Device

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Experimental program
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Embodiment

[0034] The influence of the present invention on the characteristics of electric discharge machining in cold plasma jets will be illustrated in conjunction with an example of an electric discharge milling micro-groove experiment. First, the experimental equipment is figure 1 , figure 2 connection shown. The material of the tool electrode 8 in this embodiment is tungsten, the material of the workpiece 12 is H62 brass, the high-purity working gas source 16 adopts high-purity nitrogen with a purity of 99.999%, and the high-pressure gas source 19 adopts an air compressor, which is used in the experiment The coaxial high-speed jet is a compressed air jet. The EDM medium is respectively nitrogen-cooled plasma jet, nitrogen-cooled plasma jet and coaxial high-speed air jet mixed medium, nitrogen jet, nitrogen jet and coaxial high-speed air jet mixed medium. The pulse power supply type is selected as RC pulse power supply. The processing energy is respectively set to 8200pF for a ...

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PUM

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Abstract

The invention relates to a method and device capable of improving the machining efficiency of electric sparks in atmospheric pressure cold plasma jet, and belongs to the field of machining and tools. According to the method, a mixed medium based on the cold plasma jet and cold plasma jet and coaxial high-speed jet generated by a coaxial high-speed jet composite generation device serves as an electric spark machining medium; before machining, a workpiece, a tool electrode and the corresponding polarity of a pulse generator are connected, the positions of a cold plasma jet generator and a coaxial high-speed airflow nozzle are adjusted, and therefore the electrode end and the to-be-machined area of the workpiece are completely immersed in the mixed medium; according to the method and device capable of improving the machining efficiency of the electric sparks in atmospheric pressure cold plasma jet, under the same machining condition, the material removing rate higher than that of a pure cold plasma jet is obtained, and the machining quality better than that in the mixed medium of nitrogen gas jet and high-speed air jet is obtained.

Description

technical field [0001] The invention relates to a device for atmospheric pressure cooling plasma jet electric discharge machining, which belongs to the field of mechanical processing and tools. Background technique [0002] The processing medium has an important influence on the efficiency, quality, cost and environment of EDM. Liquid media such as EDM oil and deionized self-water are currently commonly used EDM processing media. The common problem of EDM in liquid is that the electrode loss is relatively large. In addition, the use of EDM oil as the working fluid has fire hazards, and the gas decomposed during processing will pollute the environment. After the processing is completed, the workpiece needs to be cleaned with an organic solvent such as acetone. If deionized water is used as the working fluid, a larger discharge gap and higher processing speed can be obtained, but when water is used as the working fluid, stray corrosion is serious during processing, which will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H1/08B23H1/10
CPCB23H1/08B23H1/10
Inventor 余祖元邹日貌晏成洋李剑中刘新徐文骥
Owner DALIAN UNIV OF TECH
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