High low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof

A technology of powder metallurgy, high and low temperature resistance, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of reducing the friction coefficient of materials, restricting the automation industry, etc., and achieve the effect of low manufacturing cost and wide sources

Inactive Publication Date: 2012-07-18
CHONGQING HEDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of motor technology and the widening of the scope of use, the existing powder metallurgy oil bearings (FZ1460, FZ2270 and the oil bearings in the currently published Chinese patents (such as the application number is 200710193126.5 disclose a kind of powder metallurgy material made of High-speed self-lubricating oil-impregnated bearings, whose powder metallurgy materials are composed of the following materials by weight fraction: P0.5-0.7%, MoS 2 2-3%, graphite 0.5-1%, the balance is 663 bronze powder)) is far from meeting the needs, because the current oil-impregnated bearings mainly rely on lubricating oil to meet the needs of high and low temperature environments, but the use of conventional lubricating oil is also It is limited to high temperature below 180°C and low temperature above -30°C, which greatly limits the development of the motor industry and the extension of the automation industry; if you want to broaden the scope of use of oil-impregnated bearings, solve the problem of oil-impregnated bearings losing oil at high temperatures and low temperatures If the lubricating oil solidifies and cannot operate, the only way to alloy the material is to reduce the friction coefficient of the material and improve the self-lubricating function of the material so as to achieve the effect of self-lubricating in high and low temperature environments due to lack of oil.

Method used

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  • High low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof
  • High low temperature resistant oil-retaining bearing made of powder metallurgy material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Prepare raw materials: take raw materials according to the following weight percentages: -100 mesh graphite powder 35%, -100 mesh copper powder 35%, -100 mesh iron powder 30%,

[0021] (2) Electroplating coating, electroplating -100 mesh copper powder on the surface of graphite powder at a ratio of 1:1;

[0022] (3) Mixing: Fully mix the electroplated graphite and iron powder evenly, and the mixing time is at least 1h.

[0023] (4) Molding and pressing: Screen the mixed material through a 100-mesh sieve to remove the powder that cannot pass through, then put the sieved mixed material into the hopper of the molding machine, adjust the molding mold, pressurize to 400Mpa, and the pressing density is 6.4 -6.5g / m 3 .

[0024] (5) Reduction sintering: Put the pressed blank into a high-temperature mesh belt electric furnace for reduction sintering. The speed of the mesh belt is 54~60mm / min. The low temperature zone is the preheating zone, and its temperature is 580~600°C...

Embodiment 2

[0029] (1) Prepare raw materials: take raw materials according to the following weight percentages: -100 mesh graphite powder 40%, -100 mesh copper powder 40%, -100 mesh iron powder 20%,

[0030] (2) Electroplating coating, electroplating -100 mesh copper powder on the surface of graphite powder at a ratio of 1:1;

[0031] (3) Mixing: Fully mix the electroplated graphite and iron powder evenly, and the mixing time is at least 1h.

[0032] (4) Molding and pressing: Screen the mixed material through a 100-mesh sieve to remove the powder that cannot pass through, then put the sieved mixed material into the hopper of the molding machine, adjust the molding mold, pressurize to 400Mpa, and the pressing density is 6.4 -6.5g / m 3 .

[0033] (5) Reduction sintering: Put the pressed blank into a high-temperature mesh belt electric furnace for reduction sintering. The speed of the mesh belt is 54~60mm / min. The low temperature zone is the preheating zone, and its temperature is 580~600°C...

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Abstract

The invention discloses a high low temperature resistant oil-retaining bearing made of powder metallurgy material and a manufacturing method thereof. The high low temperature resistant oil-retaining bearing is characterized in that the metallurgy material is prepared from the following raw materials in percent by weight: 35-40% of C, 35-40% of Cu and balance of Fe, wherein the percent by weight of C is the same with that of Cu. The invention also provides a manufacturing method of the oil-retaining bearing, comprising the steps of: electroplating coating, mixing, compression moulding, reducing and sintering, finishing, cleaning and immersing oil. The powder metallurgy material in the invention improves content of graphite, the oil-retaining bearing made of the powder metallurgy material can adapt to the environment at the temperature of being lower than 300 DEG C and higher than minus 60 DEG C and can be continuously used, and the gap of requirement of high temperature and low temperature to the oil-retaining bearing is filled.

Description

technical field [0001] The invention relates to a high and low temperature resistant oil-impregnated bearing made of powder metallurgy materials, and also relates to a manufacturing method of the oil-impregnated bearing. Background technique [0002] With the continuous development of motor technology and the widening of the scope of use, the existing powder metallurgy oil bearings (FZ1460, FZ2270 and the oil bearings in the currently published Chinese patents (such as the application number is 200710193126.5 disclose a kind of powder metallurgy material made of High-speed self-lubricating oil-impregnated bearings, whose powder metallurgy materials are composed of the following materials by weight fraction: P0.5-0.7%, MoS 2 2-3%, graphite 0.5-1%, the balance is 663 bronze powder)) is far from meeting the needs, because the current oil-impregnated bearings mainly rely on lubricating oil to meet the needs of high and low temperature environments, but the use of conventional lu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/12F16C33/10B22F5/10B22F3/16B22F1/00
Inventor 陈富
Owner CHONGQING HEDA TECH
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