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Sintered metallic bearing and fluid dynamic bearing device equipped with the bearing

A technology for sintering metal and bearings, applied in metal processing equipment, bearings, bearing components, etc., can solve problems such as poor rotation accuracy

Active Publication Date: 2012-02-15
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the inner diameter surface 311a of the sintered material 311 becomes a tapered shape in which the diameter increases from the upper punch 314 side toward the lower punch 315 side, resulting in poor rotation accuracy.

Method used

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  • Sintered metallic bearing and fluid dynamic bearing device equipped with the bearing
  • Sintered metallic bearing and fluid dynamic bearing device equipped with the bearing
  • Sintered metallic bearing and fluid dynamic bearing device equipped with the bearing

Examples

Experimental program
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Effect test

Embodiment 1

[0160] In order to verify the effect of the first invention of the present application, sintered metal bearings (Example 1) made of raw material powders containing Cu powder, SUS powder, and pure Fe-based powder in a predetermined ratio and sintered metal bearings made of raw material powders of the conventional composition The sintered metal bearings (Comparative Examples 1 and 2) were subjected to a radial compression test and a wear measurement test, respectively, and each characteristic was comparatively evaluated.

[0161] Here, as the test material, CE-15 manufactured by Fukuda Metal Foil Powder Co., Ltd. was used as the Cu powder, DAP410L manufactured by Daido Special Steel Co., Ltd. was used as the SUS powder, and Hygna was used as the pure Fe powder. NC100.24 manufactured by Shi Co., Ltd., and PNC60 manufactured by Hegnaus Co., Ltd. were used as the phosphating Fe powder. In addition, in this experiment, Sn powder and graphite powder which are low-melting-point metals...

Embodiment 2

[0238] In order to verify the effect of the second invention of the present application, a sintered metal bearing formed from a raw material powder containing Fe-based powder and Cu powder in a predetermined ratio (Example 2) and a sintered metal bearing formed from a raw material powder of a conventional composition ( Comparative Example 3) The wear test, the radial compression test and the oil penetration measurement test were respectively carried out, and each characteristic was compared and evaluated.

[0239] Here, among the test materials, NC100.24 manufactured by Hegnaus Co., Ltd. was used as Fe powder, CE-15 manufactured by Fukuda Metal Foil Powder Co., Ltd. was used as Cu powder, and Daido was used as SUS powder. DAP410L manufactured by Special Steel Co., Ltd. In addition, in this experiment, Sn powder and graphite powder which are low-melting-point metals were used as the raw material powder, Sn-At-W350 manufactured by Fukuda Metal Foil Powder Co., Ltd. was used as t...

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Abstract

A sintered metallic bearing obtained by compacting raw-material powders comprising Cu powders, SUS powders, and pure-Fe powders and thereafter sintering the compact at a given temperature.

Description

technical field [0001] The present invention relates to a sintered metal bearing obtained by compressing and molding metal powder and then sintering it, and to a fluid dynamic pressure bearing device including the bearing. Background technique [0002] Sintered metal bearings are suitably used, for example, as sintered oil-impregnated bearings in which lubricating oil is impregnated in internal pores, and are used in parts requiring good bearing performance and durability, such as automotive bearing parts and motor spindles for information equipment. [0003] Here, the fluid dynamic pressure bearing device is one application of the sintered metal bearing. This fluid dynamic pressure bearing device is a bearing device that rotatably supports a shaft member in a non-contact manner by utilizing the dynamic pressure action of lubricating oil or the like generated in a bearing gap. This bearing device has the characteristics of high-speed rotation, high rotation accuracy, and lo...

Claims

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Application Information

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IPC IPC(8): F16C33/12B22F5/00C22C9/00C22C38/00F16C17/10F16C33/14B22F1/105B22F1/12
CPCF16C33/104F16C33/128F16C33/145F16C2202/10F16C2202/52F16C2204/10F16C2204/60B22F5/00C22C1/0425C22C33/0278F16C17/107C22C9/00B22F1/105B22F1/09B22F1/12
Inventor 伊藤冬木冈村一男日比建治
Owner NTN CORP
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