A kind of preparation method of cast copper squirrel cage rotor

A squirrel-cage rotor and copper casting technology, which is applied to casting molding equipment, casting molds, casting mold components, etc., can solve the problems of broken bars, easy oxidation, poor fluidity, and easy existence of air bubbles in rotor guide bars, and achieve detachment The effect of convenient mold, high production efficiency and fast casting speed

Inactive Publication Date: 2016-09-21
福建尤迪电机制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the above method, although the rubber casting wax mold used is low in cost and can be reused, but due to the high melting point of pure copper, easy oxidation and poor fluidity, the production efficiency is low, and the prepared rotor guide bar is prone to breakage. Squirrel cage rotors are prone to air bubbles either inside or on the surface

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  • A kind of preparation method of cast copper squirrel cage rotor

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preparation example Construction

[0023] Such as figure 1 As shown, the technical solution of the present invention is: a method for preparing a cast copper squirrel cage rotor. The preparation method first adopts the lost wax investment process to prepare the pouring cavity, and then places the pouring cavity on a low-pressure casting machine for rapid casting molding, which includes the following steps:

[0024] 1) First coat a layer of high temperature resistant insulating coating on the rotor core 1;

[0025] 2) Then set the rubber casting wax mold of the squirrel cage rotor on the rotor core 1 processed in step 1), and cast a wax pattern with the same shape as the preset squirrel cage rotor; after removing the wax casting mold, the wax pattern The gate wax pattern made of wax in advance is welded at the end ring on the lower side, and the riser (and exhaust port) wax pattern made of wax in advance is welded at the end ring on the upper side of the wax pattern at 3;

[0026] 3) Make a sand mold shell 4 o...

Embodiment 1

[0031] A method for preparing a cast copper squirrel cage rotor. The preparation method first adopts a lost-wax investment process to prepare a pouring cavity, and then places the pouring cavity on a low-pressure casting machine for rapid casting. It includes the following steps:

[0032] 1) First coat a layer of high temperature resistant insulating coating made of water glass on the rotor core 1;

[0033] 2) Then set the rubber casting wax mold of the squirrel cage rotor on the rotor core 1 processed in step 1), and cast a wax pattern with the same shape as the preset squirrel cage rotor; after removing the wax casting mold, the wax pattern The gate wax pattern made of wax in advance is welded at the end ring place 2 on the lower side, and the riser wax pattern made with wax in advance is welded at the end ring place 3 on the wax pattern upper side;

[0034] 3) Make a sand mold shell 4 with quartz sand and water glass as raw materials outside the rotor core 1 and the wax pat...

Embodiment 2

[0039] A method for preparing a cast copper squirrel cage rotor. The preparation method first adopts a lost-wax investment process to prepare a pouring cavity, and then places the pouring cavity on a low-pressure casting machine for rapid casting. It includes the following steps:

[0040]1) First coat a layer of high temperature resistant insulating coating made of fine ceramic powder on the rotor core 1;

[0041] 2) Then set the rubber casting wax mold of the squirrel cage rotor on the rotor core 1 processed in step 1), and cast a wax pattern with the same shape as the preset squirrel cage rotor; after removing the wax casting mold, the wax pattern The gate wax pattern made of wax in advance is welded at the end ring place 2 on the lower side, and the riser wax pattern made with wax in advance is welded at the end ring place 3 on the wax pattern upper side;

[0042] 3) Make sand mold shell 4 with resin sand as raw material outside the rotor core 1 and the wax pattern, and inj...

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Abstract

The invention discloses a preparation method of a cast copper cage rotor. The preparation method comprises the following steps of: firstly preparing a cast mold cavity by adopting lost-wax investment molding technology; and then placing the cast mold cavity on a low pressure casting machine to perform quick casting molding. According to the preparation method of the cast copper cage rotor, the lost-wax investment molding technology and the low pressure casting technology are combined; a rubber wax-casting mold used in the lost-wax investment molding technology is not only low in cost and convenient to demold but also capable of being used repeatedly; the low pressure casting machine is used for quickly casting and molding the cast mold cavity in the low pressure casting technology, the production efficiency is high, and the whole cast mold cavity is full of copper water from the bottom up quickly under the pressure during the casting process; the casting speed is high, and a conducting bar of the rotor is not easy to disconnect during quick casting process of copper water; and no matter inside or on the surface of the prepared cage rotor, bubbles are not easy to form, so that the quality of the prepared cage rotor is improved.

Description

technical field [0001] The invention relates to the field of motor manufacturing, in particular to a method for preparing a cast copper squirrel-cage rotor. Background technique [0002] Because copper has very good electrical and thermal conductivity, it is widely used to make various wires and cables, but it is rarely used in the squirrel cage rotor of cast AC asynchronous induction motors. In recent years, with the development of high-efficiency motors, research and development of cast copper squirrel-cage rotors have been carried out at home and abroad. At present, the preparation of cast copper squirrel-cage rotors mostly uses die-casting technology. For example, the patent application number is CN200710066135.8, and the invention patent titled "A Die-casting Method and Die-casting Device for Induction Motor Copper Squirrel-cage Rotor" discloses a The invention discloses a die-casting method and a die-casting device for a copper squirrel-cage rotor of an induction moto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/04B22D25/02B22C9/04
Inventor 吉少波林仕供
Owner 福建尤迪电机制造有限公司
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