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Casting process of copper squirrel rotor

A squirrel-cage rotor and copper material technology, applied in the field of squirrel-cage rotors, can solve the problems of trachoma, easy oxidation of copper, and affecting the quality of castings, and achieve the effect of reducing labor intensity and saving workers

Inactive Publication Date: 2007-03-21
河南福顺电磁科技有限公司
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a casting method of copper squirrel cage rotor, to solve the problem that the copper existing in the process of casting copper squirrel cage rotor is easy to oxidize at high temperature and affect the quality of the casting; and it is difficult to complete due to the poor flow rate of copper. Casting of narrow and long shapes, the problem of sand holes caused by air bubbles during the casting process

Method used

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Embodiment Construction

[0022] A concrete technological process of the present invention is:

[0023] (1) Put the unassembled silicon steel sheets with squirrel cage grooves into the furnace and heat them to 530°C.

[0024] (2) Cool naturally after being out of the furnace, and an oxide film is automatically formed on the surface of the silicon steel sheet.

[0025] (3) Assemble and press the squirrel cage rotor body, and install the casting mold. The shape of the mold is the same as that of the existing cast aluminum, except that the aperture of the vent hole is about 2 times that of the cast aluminum mold.

[0026] (4) Put the rotor silicon steel sheet into the furnace and heat it to 700°C, then put it into the high-speed centrifuge;

[0027] (5) Copper smelting material: Copper material includes: 100Kg of silicon brass, 79Kg of red copper, 3Kg of silicon, and 17Kg of zinc. Put the above materials into the furnace for smelting, add 2%-6% covering agent alkali or borax when the temperature reaches...

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Abstract

The casting process of copper squirrel cage rotor includes the following steps: 1. pre-treating silicon steel sheet through heating in a furnace a 500-600 deg.c and cooling outside the furnace to form oxide film automatically; 2. laminating, pressing and installing mold; 3. heating the pressed silicon sheets inside furnace to 650-750 deg.c, and setting in a centrifuge; 4. smelting copper material; 5. casting to the squirrel cage groove and mold cavity while turning on the centrifuge to exhaust air; and cooling outside the furnace. The present invention has the advantages of power saving of motor, reduced motor size, saving in material, low cost, etc.

Description

technical field [0001] The invention relates to a squirrel cage rotor of a three-phase asynchronous motor, in particular to a casting method for changing the existing cast aluminum squirrel cage rotor into a cast copper squirrel cage rotor. Background technique [0002] At present, there is no squirrel cage rotor of a three-phase asynchronous induction motor at home and abroad that uses a copper squirrel cage rotor. This is due to the following technical difficulties in changing the cast aluminum rotor to the cast copper rotor: [0003] 1. When the copper melting process exceeds 1200°C, a large amount of oxidation will occur. The more oxidation, the worse the casting flow, and many pores or short circuits will appear, which cannot meet the working requirements and standards of the squirrel cage rotor. [0004] 2. The flow rate of copper is poor, and it is difficult to complete the casting of the long and narrow shape of the squirrel cage, and it is easy to generate air bubbl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D25/00B22D19/16
Inventor 周西省
Owner 河南福顺电磁科技有限公司
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