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A method for forging the inner and outer rings of fan variable speed bearings

A fan speed change, inner and outer ring technology, applied in the field of steel forging, can solve the problems of difficult to guarantee the quality of forgings, coarse grains of forgings, prone to cracks, etc., and achieve the effects of shortening forging time, strong toughness and reducing waste.

Active Publication Date: 2017-12-01
四川民盛特钢锻造有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional forging process of the inner and outer rings of variable speed bearings for large-scale wind turbines includes: upsetting, elongation, punching, and ring rolling. The entire forging process is not only inefficient, but also has coarse grains or cracks easily inside the forging, making it difficult to guarantee the quality of the forging.

Method used

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  • A method for forging the inner and outer rings of fan variable speed bearings
  • A method for forging the inner and outer rings of fan variable speed bearings
  • A method for forging the inner and outer rings of fan variable speed bearings

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Experimental program
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Embodiment

[0030] Such as figure 1 As shown, a forging method for the inner and outer rings of a variable speed bearing of a fan includes the following steps:

[0031] Step 1) blanking: blanking according to the required thickness of the inner and outer rings of the variable speed bearing of the fan to make a blank;

[0032] Step 2) Heating for the first time: heating the billet in the heating furnace to 1260±10°C and keeping it warm;

[0033] Step 3) Cylindrical billet production: take out the billet in the furnace, use the forging anvil to perform an overall upsetting on the billet, take out the forging billet and stretch it to the technical size, and then perform inversion and rounding on the drawn forging billet. made into a cylindrical billet;

[0034] Step 4) Making ring blanks: after taking out the round blanks, put them on the forging anvil again, carry out secondary overall upsetting, then punch holes with punches to make ring blanks, and shape the ring blanks;

[0035] Step ...

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Abstract

The invention discloses a forging method of inner and outer rings of a variable speed bearing of a fan. The forging method comprises the following steps of: 1) blanking; 2) primary heating-number heating; 3) cylinder blank production; 4) ring blank production; 5) secondary heating-number heating; 6) rolling ring expansion; and 7) heat treatment. The forging method is totally improved, and related forging tools are improved, so that the forging efficiency is improved, the problem of internal structure change of a steel material possibly generated in the forging process is prevented, the reliable guarantee is provided to final forging quality, and the practical value is higher.

Description

technical field [0001] The invention relates to the field of forging steel parts, in particular to a forging method for the inner and outer rings of a variable speed bearing of a fan. Background technique [0002] Due to the relatively mature technology, low cost and effective reduction of carbon dioxide emissions in the field of renewable energy, wind power generation has developed rapidly around the world, and the supply of wind power equipment is in short supply. One of the key components in the. [0003] The traditional forging process of the inner and outer rings of variable speed bearings for large-scale wind turbines includes: upsetting, elongation, punching, and ring rolling. The entire forging process is not only inefficient, but also has coarse grains or cracks easily inside the forging, making it difficult to guarantee the quality of the forging. . Contents of the invention [0004] In order to overcome the above-mentioned problems in the prior art, the presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21J5/08B21J5/10B21J13/02B21J13/06B21H1/12
CPCB21H1/12B21J5/08B21J5/10B21J13/02B21J13/06B23P15/003
Inventor 许开前张建万里扬
Owner 四川民盛特钢锻造有限公司
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