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Die-casting method of induction motor copper cage rotor and die casting device thereof

A squirrel-cage rotor and induction technology, applied in the directions of rotors, transmission devices, stators, etc., can solve the problems of poor casting flow, generation of air bubbles, affecting the working performance of the motor, etc., and achieve the effect of reducing the production cost, the process and the device are reasonable.

Active Publication Date: 2008-01-23
云南铜业压铸科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the melting process, when the temperature exceeds 1200°C, a large amount of oxidation will occur. The more oxidation, the poorer the casting flow, and it is easy to generate air bubbles in the casting process, and produce pores in the casting, which will affect the working performance of the motor.

Method used

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  • Die-casting method of induction motor copper cage rotor and die casting device thereof
  • Die-casting method of induction motor copper cage rotor and die casting device thereof
  • Die-casting method of induction motor copper cage rotor and die casting device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: Die-cast 10HP copper rotor

[0049] The die-casting method and die-casting device are as described in the Summary of the Invention and shown in the accompanying drawings.

[0050] The die casting process is:

[0051] 1. Preheating process

[0052] a. The die-casting mold adopts the heating mold base to preheat the mold, or the mold base and the mold are heated at the same time to preheat the mold, and the preheating temperature is controlled at 350-650°C;

[0053] b. The pressure chamber is preheated by concentrating on the lower half of the heating chamber, and the preheating temperature is controlled at 350-650°C;

[0054] c. Laminate the silicon steel sheet and heat it with an intermediate frequency furnace. The preheating temperature is kept at 350-500°C, and put it into the preheated mold cavity;

[0055] 2. Copper smelting

[0056] a. Copper material pretreatment: copper material is pure copper with a copper content greater than 99.995%. 6.4kg of pu...

Embodiment 2

[0064] Basically with embodiment 1. The differences are:

[0065] The heating time is 40 minutes, and the mold temperature reaches 430°C; the copper material is a high-copper alloy with a copper content of not less than 90%, and 6.4kg of high-copper alloy raw material is processed into a copper rod with a length of 5cm, and the copper rod is blasted Remove the dirt, and then put it into the cold furnace, which can be preheated and smelted with the furnace; the feeding rate of the mixed gas is 0.6L / min, and the mixed gas is N 2 with H 2 Medium mixing, the mixed gas contains more than 95% nitrogen; the injection speed is 1.2m / s, and the injection pressure is 51.8Mpa.

Embodiment 3

[0067] Basically with embodiment 1. The differences are:

[0068] The heating time is 60 minutes, and the mold temperature reaches 500°C; the copper material is a high-copper-containing alloy with a copper content of not less than 90%, and 6.4kg of high-copper-containing alloy raw material is processed into a copper rod with a length of 6cm; Brush the head, pressure chamber and mold cavity with a paste lubricant mixed with Wolfrakote organic and inorganic substances sold on the market to treat the punch, pressure chamber and mold cavity; the mixed gas is N 2 Mixed with CO, the mixed gas contains more than 95% nitrogen; the injection speed is 2.83m / s, and the injection pressure is 81Mpa.

[0069] The product produced by the method of the present invention has no defects such as casting cracks, poor filling, sticky mold, etc., and its vibration present value meets the R-level regulation in IEC34-14 (1996), which is higher than the N-level specified in the Y series motor technic...

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Abstract

The invention relates to a casting method and casting machine of the induction motor cooper squirrel-cage rotor, which is suitable for the casting of pure copper and high copper content alloy. The invention belongs to nonferrous metal smelting and rolling process technology filed. The casting method comprises module pre-process, copper smelting, liquid casting and forming and quench water cooling. The casting method adopts a casting device which is composed of a casting machine and a smelting furnace, wherein, the smelting furnace comprises an integrated pot and middle frequency induction furnace, the heating efficiency of the middle frequency induction furnace is 0 to 100KW; the casting module comprises a group connection which is connected by a plurality of embedded lump. The invention has reasonable technics and equipment, the product has no defects of breakage on casting piece and surface, poor filling and mold sticking, the shaking present value complies with the R degree provision in IEC34-14(1994), which has the advantages of improving by one degree comparing with the N degree stipulated in Y series motor technology condition.

Description

Technical field: [0001] The invention relates to a die-casting method and a die-casting device for a copper squirrel-cage rotor of an induction motor, which are suitable for die-casting pure copper and high-copper-containing alloys, and belong to the technical field of nonferrous metal smelting and rolling processing. Background technique: [0002] In recent years, since the conductivity of copper is about 40% higher than that of aluminum, cast copper rotors have attracted attention. However, due to the difficulty in producing cast copper rotors, cast aluminum rotors are still widely used in electric motors. [0003] Difficulties in die-casting copper rotor technology are: the purity of the copper melt and the high casting temperature. The casting temperature of die-casting aluminum is only 700°C, and the casting temperature of copper die-casting copper is not lower than 1100°C. During the melting process, if the temperature exceeds 1200°C, a large amount of oxidation will ...

Claims

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Application Information

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IPC IPC(8): B22D19/00B22D17/00
Inventor 黄善富徐弘王勤杨旭禹建敏付志华周胜梁栋靳芝白双建杨红梅邓陈兴
Owner 云南铜业压铸科技有限公司
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