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Powder metallurgy oil-free lubricating bearing and method for preparing same

An oil-free lubrication, powder metallurgy technology, used in bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of high bearing scrap rate, increase friction noise, shaft core wear, etc., achieve small friction contact area, increase rotation Efficiency and improved service life

Active Publication Date: 2012-06-20
扬州保来得科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the manufacturing process of ordinary bearings, problems such as cracks and inner diameter bending are prone to occur, which directly leads to high scrap rate and low production efficiency of the produced bearings, which is not conducive to the mass production of bearings
In addition, due to the large contact area between the shaft core and the bearing when the motor is running, friction occurs, and the shaft core will wear out rapidly. At the same time, the starting current of the motor will also increase, resulting in early burnout of the motor
If lubricating oil is added to the bearing, the lubricating oil will be quickly volatilized and cracked under the influence of frictional heat at this time, which will not have a good effect
In addition, due to the disadvantages of ordinary bearings, such as easy deformation of the inner diameter and coaxial difference between the upper and lower ends, while reducing the operating efficiency of the motor, it also increases the friction noise during operation.

Method used

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  • Powder metallurgy oil-free lubricating bearing and method for preparing same
  • Powder metallurgy oil-free lubricating bearing and method for preparing same
  • Powder metallurgy oil-free lubricating bearing and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0024] After mixing Cu powder, Sn powder and C evenly, put them into a molding machine for molding; the parts by weight of each component are: C: 0.5, Cu: 86.5, Sn: 13; then put it into a mesh belt firing furnace Carry out sintering, the sintering temperature is 650°C; the sintered products are subjected to finishing and cleaning processes in turn; under vacuum conditions, the oil-immersed fluorinated oil process is carried out; finally, deoiling treatment is carried out to prepare powder metallurgy oil-free lubricating bearings.

[0025] After testing, the prepared powder metallurgy oil-free lubricating bearing has radial crushing force: 110kgf; material radial crushing strength: 60MPa; friction coefficient: 0.020; outer diameter eccentricity: 0.05mm; end face eccentricity: 0.05mm .

Embodiment 2

[0027] After mixing Cu powder, Sn powder and C evenly, put them into a molding machine for molding; the parts by weight of each component are: C: 3.0, Cu: 92, Sn: 5; then put them into a mesh belt firing furnace Carry out sintering, the sintering temperature is 730°C; the sintered products are subjected to finishing and cleaning processes in turn; under vacuum conditions, the oil-immersed fluorinated oil process is carried out; finally, deoiling treatment is carried out, that is, powder metallurgy oil-free lubricating bearings are prepared.

[0028] After testing, the prepared powder metallurgy oil-free lubricating bearing has radial crushing force: 130kgf; material radial crushing strength: 150MPa; friction coefficient: 0.010; outer diameter eccentricity: 0.03mm; end face eccentricity: 0.04mm .

Embodiment 3

[0030] After mixing Cu powder, Sn powder and C evenly, put them into a molding machine for molding; the parts by weight of each component are: C: 2.0, Cu: 85; Sn: 13; then put it into a mesh belt firing furnace Carry out sintering, the sintering temperature is 730°C; the sintered products are subjected to finishing and cleaning processes in turn; under vacuum conditions, the oil-immersed fluorinated oil process is carried out; finally, deoiling treatment is carried out, that is, powder metallurgy oil-free lubricating bearings are prepared.

[0031] After testing, the prepared powder metallurgy oil-free lubricating bearing has radial crushing force: 170kgf; material radial crushing strength: 230MPa; friction coefficient: 0.008; outer diameter eccentricity: 0.02mm; end face eccentricity: 0.01mm .

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Abstract

The invention discloses a powder metallurgy oil-free lubricating bearing and a method for preparing the same. The powder metallurgy oil-free lubricating bearing comprises a shaft body provided with anaxial central hole, and the outer surface of the shaft body is provided with an oil storage tank. The preparation method comprises the following steps: (1) evenly mixing Cu-Sn powder and C powder forforming, wherein the weight portion of all components is that: C is 0.5 to 3.0 portion, Cu is 85 to 93 portions and Sn is 5 to 13 portions; (2) controlling the temperature to between 650 and 730 DEGC, and performing sintering; (3) orderly performing finishing and cleaning; (4) performing vacuum oil immersion; and (5) performing deoiling treatment. The product has high precision and good dimension stability. Because the internal diameter tolerance of the product is controlled at 8u, and the axiality of the product is less than 0.05mm, and the matching gap between the product and the shaft issmall, so that the friction contact area is small, the rotating efficiency of a fan is improved, the operating noise of the fan is reduced, and the service life of the fan is prolonged.

Description

technical field [0001] The invention relates to a powder metallurgy bearing and a preparation method thereof, in particular to a powder metallurgy oil-free lubricating bearing and a preparation method thereof. Background technique [0002] At present, in the manufacturing process of ordinary bearings, problems such as cracks and inner diameter bending are prone to occur, which directly leads to high scrap rate and low production efficiency of the produced bearings, which is not conducive to mass production of bearings. In addition, due to the large contact area between the shaft core and the bearing when the motor is running, friction occurs, and the shaft core will wear out rapidly. At the same time, the starting current of the motor will also increase, resulting in early burnout of the motor. If lubricating oil is added to the bearing, the lubricating oil will volatilize and crack rapidly under the influence of friction heat at this time, which cannot play a very good effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/10F16C33/12F16C33/14B22F3/12B22F3/26
Inventor 刘文雄徐同官劲松胡云峰
Owner 扬州保来得科技实业有限公司
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