Plasma rotating electrode milling machine group and technique

A rotating electrode and plasma technology, which is applied in the field of powder metallurgy, can solve the problem of imperfect metal spherical shape, and achieve the effect of wide particle size distribution, high yield and perfect spherical shape.

Inactive Publication Date: 2008-12-24
张建利
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  • Abstract
  • Description
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Problems solved by technology

It needs to melt the metal in advance, and the spherical shape of the prepared metal is not perfect

Method used

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  • Plasma rotating electrode milling machine group and technique
  • Plasma rotating electrode milling machine group and technique

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Embodiment Construction

[0021] A plasma rotary electrode powder making unit as shown in the figure, which includes: a rotary feeding mechanism 1 for fixing the metal rod to be processed as an anode rod and driving the anode rod to rotate at a high speed and to feed step by step; for spherical powder The formed vacuum furnace 2; the vacuum unit 3 used to evacuate the vacuum furnace 2; the plasma gun device 4 used as the arc starting cathode and establishes the arc light to melt the anode rod; the power supply 5 providing power for the entire unit; the rotary feed mechanism 1 Located outside one side of the vacuum furnace 2, the plasma gun device 4 is located on the other side of the vacuum furnace 2; the vacuum unit 3 communicates with the vacuum furnace 2 through the exhaust pipe, and the vacuum furnace 2 has a double-layer interlayer structure, and the interlayer has a cooling cycle Water; a receiving mechanism is installed at the bottom of the vacuum furnace 2, and the receiving mechanism is two shu...

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Abstract

The invention relates to a plasma rotary electrode powder milling set and a process thereof, relating to the technical field of powder metallurgy. The milling set comprises a rotating feeding mechanism, a vacuum furnace, a vacuum unit, a plasma gun device and an electrical source. The rotating feeding mechanism is arranged at the exterior of one side of the vacuum furnace; the plasma gun device is arranged at the interior of the other side of the vacuum furnace; the vacuum unit is communicated with the vacuum furnace through a ventilation pipe, wherein, the vacuum furnace body has a double-decker sandwich structure, and cooling circulating water is injected into the sandwich structure; a receiving mechanism is arranged at the bottom part of the vacuum furnace, wherein, the receiving mechanism comprises two cut-off valves connected in series. The process includes the following steps: metal is processed into electrode bars; low-voltage heavy current is applied to the electrode bars to melt the electrode bars in a highly vacuumized melting chamber through the high temperature produced by the cathode arc of the plasma gun, and to eject the molten metal instantly by the strong centrifugal force produced through the high-speed rotation of the electrode bars to produce fine metal powders. The invention is characterized in that the yield of perfect spherical metal powders is up to 97 percent, and the powders are free from the contamination of any microelement.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a production process and device for preparing perfectly spherical microbead powder, especially capable of completing the preparation of spherical powders of high melting point and refractory metals. Background technique [0002] At present, the known metal spherical powder is produced by gas atomization, water atomization and other methods. The yield of metal perfect spherical powder produced by the former two production methods is about 10%-12%, and the sphere has a hollow state. And it cannot be completely sorted. Generally, it will pollute the prepared materials slightly and change their chemical properties. [0003] According to the search, the metal powder processing equipment designed for the mass production of nano metal particles using plasma technology, the main structure is that a plasma gun is placed on the upper part of the shell lined with high temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/10
Inventor 张建利
Owner 张建利
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