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Powder metallurgy method for preparing claw pole of electric generator and claw pole manufactured by method

A generator claw pole and powder metallurgy technology, which is applied in the field of generator claw pole preparation by powder metallurgy, to achieve the effects of improving motor efficiency, suppressing the increase of magnetic flux, and fast current response

Inactive Publication Date: 2013-01-30
XIANGTAN CHANGDIAN AUTOMOBILE ELECTRICAL APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the product is prepared by powder metallurgy, the loss of metal is only 1-5%, but when it is produced by general casting method, the loss of metal may reach 80%

Method used

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  • Powder metallurgy method for preparing claw pole of electric generator and claw pole manufactured by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The components of powder metallurgy claw pole parts are: 0.5% phosphorus, 1% silicon, 98.5% iron, and the above components are mass percentages.

[0046] The preparation process is as follows:

[0047] (1) Mixing, the components are mixed uniformly according to the above proportions and then mixed with 0.5% lubricant and mixed uniformly with a V-type mixer;

[0048] (2) Pressing, the mixture is formed into a powder compact with a pressing pressure of 600MPa;

[0049] (3) Sintering, the degree of vacuum is better than 10 -2 The temperature was raised to 1150 °C under the condition of Pa, filled with high-purity argon gas to 1 atmosphere, sintered for 3 hours, and cooled to room temperature with the furnace;

[0050] (4) Re-pressing and re-firing, and re-pressing is carried out under a pressing pressure of 700 MPa. The re-pressed sample is re-fired, that is, the vacuum degree is better than 10 -2 The temperature was raised to 1200 °C under the condition of Pa, filled ...

Embodiment 2

[0055] The components of powder metallurgy claw pole parts are: 0.45% phosphorus, 99.55% iron, and the above components are mass percentages.

[0056] The preparation process is as follows:

[0057] (1) Mixing, each component is mixed uniformly according to the above ratio, and then mixed with 0.6% lubricant and mixed uniformly with a V-type mixer;

[0058] (2) Pressing, the mixture is formed into a powder compact with a pressing pressure of 700MPa;

[0059] (3) Sintering, the degree of vacuum is better than 10 -2 The temperature was raised to 1150 °C under the condition of Pa, filled with high-purity argon gas to 1 atmosphere for sintering for 3 hours, and cooled to room temperature with the furnace;

[0060] (4) Re-pressing and re-firing, and re-pressing is carried out at a pressing pressure of 800 MPa. The re-pressed sample is re-fired, that is, the vacuum degree is better than 10 -2 The temperature was raised to 1180 °C under the condition of Pa, filled with high-purit...

Embodiment 3

[0065] The components of powder metallurgy claw pole parts are: 0.2% phosphorus, 1% silicon, 1% aluminum, 97.8% iron, and the above components are mass percentages.

[0066] The preparation process is as follows:

[0067] (1) Mixing, each component is mixed uniformly according to the above proportions, then mixed with 0.8% lubricant and mixed uniformly with a V-type mixer;

[0068] (2) Pressing, the mixture is formed into a powder compact with a pressing pressure of 800MPa;

[0069] (3) Sintering, heating up to 1300°C under hydrogen atmosphere, holding for 4h, and cooling to room temperature with the furnace;

[0070] (4) Re-pressing and re-firing, and re-pressing is carried out at a pressing pressure of 800 MPa. The re-pressed sample is re-fired, that is, the vacuum degree is better than 10 -2 The temperature was raised to 1400 °C under the condition of Pa, filled with high-purity argon for 3 hours, and then cooled with the furnace;

[0071] (5) Finishing the refired samp...

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Abstract

The invention relates to a claw pole for an electric generator, in particular to a powder metallurgy method for preparing the claw pole of the electric generator and the claw pole manufactured by the method. The method comprises the following steps of material mixing, compressive formation, sintering, repeating compression and sintering, finishing and heat treatment. The claw pole is prepared by the powder metallurgy method, the compaction with a final size can be compressed, the product precision is high, the precision of a claw part can reach 0.03mm, subsequent mechanical processing is not needed or rarely needed, metal can be greatly saved, and the product cost can be lowered. Additionally, the claw pole is one of important parts in the electric motor, and the using amount is great. The powder metallurgy process has great advantages in the aspect of producing the product with the same shape and a large quantity, the production cost can be greatly lowered, and the powder metallurgy method is particularly suitable for batch production. Meanwhile the claw pole manufactured by the method is provided with a high and maximum magnetic conductivity, the iron damage rate of the claw pole is low, the density of the claw pole is uniform, and saturation and magnetization strength are high.

Description

technical field [0001] The invention relates to a claw pole for a generator, in particular to a method for preparing a generator claw pole by powder metallurgy and a claw pole produced by the method. Background technique [0002] With the rapid development of the manufacturing industry, the demand for high-precision and complex-shaped forgings in parts is increasing, especially for some forgings that are difficult to machine or have high processing costs, requiring direct precision forging to reduce costs, Improve the competitiveness of the vehicle. Claw pole parts are one of them. The claw pole is an important part of the motor, with a wide variety and very complex shapes. There are many vertical claws evenly distributed on the thin flat plate. The vertical claws not only have high cross-sectional size and precision requirements, but also have some It is a tapered arc surface, so it is difficult to manufacture. How to use efficient and energy-saving methods to produce hi...

Claims

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Application Information

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IPC IPC(8): B22F3/16C22C38/00
Inventor 李丽娅易长庚肖勇赵一清
Owner XIANGTAN CHANGDIAN AUTOMOBILE ELECTRICAL APPLIANCES CO LTD
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