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EDM Method in Atmospheric Pressure Cooled Plasma Jet

A technology of cold plasma and processing methods, which is applied in the field of mechanical processing and tools, can solve problems that have not been reported, and achieve the effects of convenient use, increased discharge gap, and reduced short-circuit rate

Inactive Publication Date: 2018-01-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there has been no report on the use of cold plasma jets under atmospheric pressure as EDM media.

Method used

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  • EDM Method in Atmospheric Pressure Cooled Plasma Jet
  • EDM Method in Atmospheric Pressure Cooled Plasma Jet
  • EDM Method in Atmospheric Pressure Cooled Plasma Jet

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Experimental program
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Effect test

Embodiment

[0022] The characteristics of the cold plasma jet as the EDM medium will be described by combining the EDM micro-groove experiment as an example. The tool electrode material is dock, the workpiece material is H62 brass, and the working gas source is high-purity nitrogen with a purity of 99.999%. The EDM micro-groove machining experiments were carried out in cold plasma jet, nitrogen jet and deionized water respectively. The pulse power supply is RC pulse power supply. The open-circuit voltage of the pulse power supply is set to 80V, and the capacitance values ​​are set to 3300pF and 8200pF respectively. Adjust the output pressure of the pressure reducing valve 11 to 0.3Mpa, and adjust the gas flow quality controller 10 so that the gas flow entering the cold plasma generator 6 is 15slm. Adjust the position of the cold plasma generator 6 so that the end of the tool electrode 5 and the area to be processed of the workpiece 7 are completely submerged in the cold plasma jet 13, a...

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Abstract

The invention relates to a method for electrosparking in an atmospheric pressure cold plasma jet, and belongs to the field of machining and tools. The macroscopic temperature of the atmospheric pressure cold plasma jet is lower than the room temperature or slightly higher than the room temperature, and any heat injury to a surface to be machined is avoided. During work, a work gas source enters a cold plasma jet generator through a pressure reducing valve and a gas flow and quality controller; and the flow of the work gas source and the output voltage of a high-voltage power source are adjusted, and therefore the cold plasma jet generator can generate the stable cold plasma jet. The position of the cold plasma jet generator is adjusted, and therefore the end of an electrode and to-be-machined areas of workpieces can be completely immersed in the cold plasma jet. According to the method for carrying out electrosparking in the atmospheric pressure cold plasma jet, under the same machining condition, the surface roughness and the electrode consumption lower than those in deionized water and the surface quality better than that in gas can be obtained.

Description

technical field [0001] The invention relates to an electric spark machining method in an atmospheric pressure cooling plasma jet, and belongs to the field of mechanical processing and tools. Background technique [0002] The processing medium is an important part of the EDM system, which has an important impact on the production efficiency, processing quality, cost, environmental protection and safety of EDM. Currently, liquid medium is widely used in EDM, which is mainly divided into EDM oil and deionized self-water. The common problem of EDM in liquid is that the electrode loss is large. In addition, using 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. Using deionized water instead of EDM oil as the working fluid has a larger discharge gap and higher processing speed, but there is still an ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H1/00B23H1/10
CPCB23H1/00B23H1/10
Inventor 余祖元邹日貌徐文骥李剑中
Owner DALIAN UNIV OF TECH
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