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High speed self-lubricating oily bearing made from powder metallurgical material

A powder metallurgy and self-lubricating technology, applied in the field of materials, can solve the problems of high-speed performance of precision rolling bearings, poor heat and corrosion resistance, high manufacturing cost, loss of precision, etc., and achieve high mechanical strength, good wear resistance, and thermal conductivity. high effect

Inactive Publication Date: 2008-05-28
LUOYANG BEARING SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Precision rolling bearings have poor high-speed performance, heat resistance and corrosion resistance, complex structure, high manufacturing cost, and are prone to lose their precision and fail when running at high speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The powder metallurgy materials used in high-speed self-lubricating oil-impregnated bearings are composed of: P: 0.5%, MoS 2 : 2%, graphite: 1%, and the balance is 663 bronze powder.

[0027] I. mix

[0028] Weigh the raw material powder according to the above composition, put it into a 2-liter ball mill bucket, and carry out ball milling on a roller ball mill for 2 hours;

[0029] II. Forming

[0030] Steel mold pressing forming, pressing pressure: 5 tons / cm 2 ;

[0031] III. Sintering

[0032] The sintering equipment is a vacuum furnace, the sintering temperature is 800°C, and the heat preservation is 1h;

[0033] IV. Finishing

[0034] The sintered billet is then finished with a finishing die to improve surface finish and dimensional accuracy;

[0035] V. Immersion oil

[0036] Vacuum soak T1# special lubricating oil for high-speed oil-impregnated bearings for 2 hours to prevent rust and complete capillary oil storage.

Embodiment 2

[0038] The powder metallurgy materials used in high-speed self-lubricating oil-impregnated bearings are composed of: P: 0.6%, MoS 2 : 3%, graphite: 0.5%, the rest is 663 bronze powder.

[0039] I. mix

[0040] Weigh the raw material powder according to the above composition, put it into a 2-liter ball mill bucket, and carry out ball milling on a roller ball mill for 2 hours;

[0041] II. Forming

[0042] Steel mold pressing forming, pressing pressure: 5 tons / cm 2 ;

[0043] III. Sintering

[0044] The sintering equipment is a vacuum furnace, the sintering temperature is 800°C, and the heat preservation is 1h;

[0045] IV. Finishing

[0046] The sintered billet is then finished with a finishing die to improve surface finish and dimensional accuracy;

[0047] V. Immersion oil

[0048] Vacuum soak T1# special lubricating oil for high-speed oil-impregnated bearings for 2 hours to prevent rust and complete capillary oil storage.

Embodiment 3

[0050] The powder metallurgy materials used in high-speed self-lubricating oil-impregnated bearings are composed of: P: 0.7%, MoS 2 : 2.5%, graphite: 0.8%, the rest is 663 bronze powder.

[0051] I. mix

[0052] Weigh the raw material powder according to the above composition, put it into a 2-liter ball mill bucket, and carry out ball milling on a roller ball mill for 2 hours;

[0053] II. Forming

[0054] Steel mold pressing forming, pressing pressure: 5 tons / cm 2 ;

[0055] III. Sintering

[0056] The sintering equipment is a vacuum furnace, the sintering temperature is 800°C, and the heat preservation is 1h;

[0057] IV. Finishing

[0058] The sintered billet is then finished with a finishing die to improve surface finish and dimensional accuracy;

[0059] V. Immersion oil

[0060] Vacuum soak T1# special lubricating oil for high-speed oil-impregnated bearings for 2 hours to prevent rust and complete capillary oil storage.

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PUM

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Abstract

A high-speed self-lubricating oilness bearing is made from powder metallurgy material. The powder metallurgy material is constituted by the following weight percentage of P: 0.5-0.7%, MoS 2: 2-3%, graphite: 0.5-1% and the residual is 663 bronze powders. A process for the preparation of the bearing comprises putting raw powders weighted according to the composition into a ball mill barrel with 2 liters, ball milling raw powders 2h on a roller-type ball mill, pressing into a shape through a steel die with a pressing pressure of five ton / cm 2, sintering in a vacuum furnace with sintering temperature of 800 DEG C, then preserving heat 1h, sizing sintered compacts through a sizing die to increase surface fineness and dimensional precision, vacuum soaking T1# special lubricating oil for the high-speed oilness bearing for 2h to prevent corrosion and finish capillary oil storage. The self-lubricating of material is realized by choosing Cu base powdered material along with solid lubricant and base strengthening elements, and the special surface structure is achieved through the powder metallurgy sintering technology controlling pore space of material, and the oilness effect of material is obtained by utilizing capillary effect.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a high-speed self-lubricating oil-impregnated bearing made of powder metallurgy materials. Background technique [0002] With the development of science and technology, the variety of modern electric tools is increasing day by day. High-speed electric tools in developed countries in foreign countries all use high-speed oil-impregnated bearings, such as Japan's Hitachi FDIOSA hand drill, American SKI's JID.SAW4235 electric curve saw, etc. . In electric tools, high-speed self-lubricating oil bearings above 25,000r / min are used to replace high-speed precision rolling bearings, which can simplify the structure of electric tools, reduce volume, reduce assembly processes, and make assembly easier. [0003] Precision rolling bearings have poor high-speed performance, heat resistance, and corrosion resistance. They have complex structures and high manufacturing costs. They...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/12F16C33/14B22F5/00B22F3/16
Inventor 孙永安邬祖梁张永乾李明先
Owner LUOYANG BEARING SCI & TECH CO LTD
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