Method for producing a dynamic fluid bearing with high rotation precision and high hardness

a technology of dynamic fluid bearings and high precision, which is applied in the direction of mechanical equipment, vacuum evaporation coatings, coatings, etc., can solve the problems of degrading the durability and precision of bearing components, degrading the viscosity of fluids, and reducing the protective effect, so as to achieve high precision and hardness, and facilitate the production of such components

Inactive Publication Date: 2006-03-23
HUNG CHIN CHU +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0007] Accordingly, the primary objective of the present invention is to provide a method for manufacturing bearing components, such as sleeve and spindle, of high precision and hardness supporting fluid dynamic-pressure, whi

Problems solved by technology

However, in the start-up period and in low-speed rotation, the spindle and the sleeve may contact and produce metal powder in the fluid, causing a change in fluid viscosity and therefore degrading the lubricating fluid.
The durability and precision of the bearing components may also degrade.
However, the protective

Method used

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  • Method for producing a dynamic fluid bearing with high rotation precision and high hardness
  • Method for producing a dynamic fluid bearing with high rotation precision and high hardness
  • Method for producing a dynamic fluid bearing with high rotation precision and high hardness

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Embodiment Construction

[0088] The components referred in a method for manufacturing bearing components of high precision and hardness supporting fluid dynamic-pressure according to the present invention are a plurality of pivotally connected rotary units. In the first preferred embodiment they are a sleeve 2 and a spindle 1; the spindle 1 is pivotally inserted into an axial hole 21 of the sleeve 2, as shown in FIG. 1.

[0089] The spindle 1 comprises a shaft 11 and a bulged ring 12, which bulged ring 12 further includes an inclined end surface 121. The inclined end surface 121 and the lateral surface 111 of the shaft 11 form a smooth pivotal interface, as shown in FIG. 1a. The lateral surface 111 and the inclined end surface 121 may be provided with a bulged or carved surface pattern, such as fishbone notches, as shown in FIGS. 1b and 1c.

[0090] For stabilizing the rotary spindle 1, the central portion of the sleeve 2 is provided with an axial hole 21 and a ring receptacle 22, as shown in FIG. 1d, whereby t...

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Abstract

A method for manufacturing bearing components of high precision and hardness supporting fluid dynamic-pressure comprises the steps of: (1) selecting at least one rotary component provided with a predetermined surface pattern for supporting a distribution of fluid dynamic-pressure; (2) forming an opaque and hard amorphous diamond (DLC, a-D) film (or nano-crystalline diamond film) on the pivotal surface of the component by physical vapor deposition (PVD). Thereby the pivotal surfaces of the rotary component and the pattern thereon can have excellent hardness, wearing resistance, rotational stailbity and durability under repeated urging of dynamic fluid pressure.

Description

FIELD OF THE INVENTION [0001] The present invention relates to methods for manufacturing bearing components supporting fluid dynamic-pressure, more particularly to a method for manufacturing bearing components of high precision and hardness for dynamic pressure fluids, in which physical vapor deposition is utilized to coated an amorphous diamond film of hardness approaching 80-100 GPa over a pivotal interface or a patterned surface on which a fluid pressure is distributed of a bearing component. BACKGROUND OF THE INVENTION [0002] Dynamic-pressure fluid bearings are used in high-speed driving units of hard disk drives and CD-ROM, which mainly comprise a sleeve, a spindle and a fluid, such as air and lubricating oil, injected therebetween. The dynamic-pressure fluid bearings of the prior art are categorized into dynamic-pressure fluid radial bearings and dynamic-pressure fluid thrust bearings. According to various necessities, the pivotal interface between the sleeve and the spindle o...

Claims

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Application Information

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IPC IPC(8): B21K1/10
CPCY10T29/49639C23C14/0605
Inventor TSENG, SHAO CHIENTSENG, HSIN CHAOYUAN, TE YULEE, CHING MAN
Owner HUNG CHIN CHU
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