Combined type equipment for manufacturing spherical powder through rotating electrode

Abstract

The invention discloses combined type equipment for manufacturing spherical powder through a rotating electrode. The right end of a furnace body located on a base is provided with a vacuum connection pipe, and the vacuum connection pipe is connected with a vacuum system. A bed stand arranged at the left end of the furnace body is horizontally provided with a first electric main shaft and a current collecting device, wherein the first electric main shaft and the current collecting device are linked coaxially. A transmission shaft is coaxially linked to the current collecting device. The transmission shaft extends into the left portion of the furnace body in a sealed manner, and current guiding is conducted through the current collecting device. A rodlike blank is supported on the left portion inside the furnace body, and the tail end of the rodlike blank is linked with the front end of the transmission shaft. A transferred arc plasma gun is horizontally arranged on the right portion inside the furnace body. A second electric main shaft is vertically mounted on a vertical lifting mechanism at the upper end of the base and extends into the lower portion of the furnace body in a sealed manner, and the upper end of the second electric main shaft is coaxially linked with the rotating electrode. The rotating electrode is located under the front end of the rodlike blank. Two non-transferred-arc plasma guns are symmetrically arranged at the two sides of the rotating electrode in an inclined manner. By means of the combined type equipment, the rotating electrode is separated from electric conduction, and fusion is separated from tossing-out; and the fine powder rate is increased, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a device for manufacturing spherical powder with a composite rotating electrode. Background technique [0002] There are three main methods of producing metal spherical powder: blowing method; rotating disk method; rotating electrode method. For the latter two, it has been proved theoretically that the relationship between the diameter of the powder and the rotational speed and the diameter of the electrode: If the particle size of the powder is small, it is necessary to increase the speed or increase the diameter of the electrode [0003] The blowing method is to use high-pressure argon to blow the molten metal into droplets, and the droplets are cooled into spherical shapes while flying in the air. This method can produce very fine powder, but the shape of the ball is not good, and there are cavitation phenomena. The rotating disk method has a wide ran...

AI Technical Summary

Problems solved by technology

[0004] The rotating electrode method has a history of about 50 years, but there are several major disadvantages: 1. The speed is low, generally not exceeding 12000 rpm

2. The vibration is serious, and the bearing is easily damaged

3. Use carbon brushes to conduct electricity, the carbon brushes are in contact with the collector, and the friction generates heat. Although measures such as water spraying are taken, when the speed is high, the linear speed allowed by the carbon brushes is exceeded, which is likely to cause failure

These three shortcomings make the equipment have a high failure rate, and most of the production time is spent on replacing bearings and repairing equipment

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