Plasma generator for powder spheroidizing or fine coating

A spheroidization and plasma technology, which is applied in the field of plasma, can solve the problems of large diameter of the jet, which is not suitable for actual requirements, and achieve the effect of improving efficiency, energy concentration and speed.

Pending Publication Date: 2021-06-04
SOUTHWESTERN INST OF PHYSICS
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AI Technical Summary

Problems solved by technology

[0004] The diameters of jets produced by existing plasma generators are generally large, which is not suitable for the actual requirements of jet diameters in the fields of powder spheroidization, fine coating or additive manufacturing, especially for spheroidization of refractory metal powders and Precision in-situ repair of damaged workpieces and other fields

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  • Plasma generator for powder spheroidizing or fine coating

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Embodiment Construction

[0026] The present invention will be further described below by means of the accompanying drawings and specific embodiments.

[0027] Such as figure 1 As shown, a plasma generator for powder spheroidization or fine coating includes a cathode assembly 1 , an insulating sleeve 2 , an anode assembly 3 , and a powder feeding port 4 .

[0028] Among them, the cathode assembly 1 is composed of a copper seat 6, a cathode head 5 and a cathode cooling jacket 7. The copper seat 6 is connected to the cathode cooling jacket 7 through threads. One end of the cathode cooling jacket 7 is processed with a cooling water inlet 15 and an outlet 16, and the other end is Six spiral channels 13 uniformly arranged along the circumferential direction are processed.

[0029] Copper seat 6 is coaxially installed with the above-mentioned cathode cooling jacket 7, one end of which is processed into a stepped structure for positioning and installation with cathode cooling jacket 7, and the other end is p...

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Abstract

The invention relates to a thermal plasma technology, in particular to a plasma generator for powder spheroidizing or fine coating. The generator comprises a cathode assembly, an insulating sleeve and an anode assembly; the cathode assembly comprises a red copper seat, a cathode head and a cathode cooling sleeve, and the anode assembly comprises an anode and an anode cooling sleeve which are coaxially mounted. A spherical tungsten rod serves as a cathode head and is embedded in a red copper seat, electrode ablation is relieved, the service life of an electrode is prolonged, an anode is of a 2-5 mm hollow red copper structure, and working gas is converged in a channel between the cathode head and the anode to form high-speed plasma jet flow after forming higher atmospheric pressure and passing through an anode channel. The diameter of the plasma jet beam generated by the device ranges from 2 mm to 5 mm, energy is more concentrated, the jet speed is higher, powder can better absorb heat to be melted, and the spherical powder preparing or coating efficiency is improved.

Description

technical field [0001] The invention belongs to thermal plasma technology, in particular to a plasma generator used for powder spheroidization or fine coating. Background technique [0002] For the fields of powder spheroidization or fine coating of the workpiece surface, the basic requirements for the heat source are high temperature and concentrated energy, which helps to improve its energy absorption efficiency. The thermal plasma jet has the characteristics of high temperature, high enthalpy, high energy density and adjustable working medium, and has been widely used in cutting, environmental protection and other fields. In the future, it may be used in powder spheroidization treatment, damaged workpiece surface repair and workpiece surface coating. It has broad market application prospects in fields such as cladding and preparation of various coatings, and it may also become another heat source to replace the existing additive manufacturing (3D printing) mainly based on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/34
CPCH05H1/34
Inventor 陈伦江曹诚志才来中程昌明童洪辉
Owner SOUTHWESTERN INST OF PHYSICS
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