Method for manufacturing bearing assembly

Abstract

The invention provides a method for manufacturing bearing assembly. The method comprises: coating a photoresist on an inner wall of a through hole of a bearing; inserting an ultraviolet lamp having a transparent groove pattern thereon into through hole and performing exposure process so as to photosensitize the photoresist corresponding to the groove pattern; removing the ultraviolet lamp and cleaning the photosensitized portion of the photoresist by developer; etching the inner wall not covered with the photoresist by an etchant or forming a deposited layer on the inner wall not covered with the photoresist; removing the photoresist reminding on the inner wall by a stripping agent so as to complete the method for manufacturing a dynamic bearing. The method is also proved to a surface of a shaft to manufacture the dynamic bearing.

1 . A method for manufacturing a bearing, comprising the steps of: 
 providing a bearing having a through hole;    coating a photoresist on an inner wall of the through hole;    inserting an ultraviolet lamp having at least one pattern of groove into the through hole and performing an exposure process;    removing the photoresist to expose portions of the inner wall by a developer; and    forming deposited layers on the exposed portions of the inner wall so that at least one groove is formed between the two adjacent deposited layers.    
   
   
       2 . The method as recited in  claim 1 , wherein the groove comprises V shape, fishbone, chevron or twill pattern.  
   
   
       3 . The method as recited in  claim 1 , wherein the pattern of groove is formed by attaching a mask to the ultraviolet lamp.  
   
   
       4 . The method as recited in  claim 3 , wherein the mask comprises a pattern of oil reservoir.  
   
   
       5 . The method as recited in  claim 3 , wherein the photoresist is a positive photoresist, and wherein the ultraviolet lamp emits ultraviolet light having the wavelength ranging from 350 nm to 450 nm, the pattern of groove is opaque to the ultraviolet light, while the other portion of the mask is transparent.  
   
   
       6 . The method as recited in  claim 3 , wherein the photoresist is a negative photoresist, and wherein the ultraviolet lamp emits ultraviolet light having the wavelength ranging from 350 nm to 450 nm, the pattern of groove is transparent to the ultraviolet light, while the other portion of the mask is opaque.  
   
   
       7 . The method as recited in  claim 1 , wherein the bearing comprises copper, brass, bronze, aluminum, aluminum alloys or alumina ceramic.  
   
   
       8 . The method as recited in  claim 7 , wherein the deposited layer is formed by electroplating, sputtering, and a chemical reaction.  
   
   
       9 . The method as recited in  claim 8 , wherein the deposited layer comprises nickel-cobalt alloy, nickel-phosphor alloy, nickel-cobalt-phosphor alloy or a wear resistant material.  
   
   
       10 . The method as recited in  claim 8 , wherein the chemical reaction is dipping the bearing in oxalic acid solvent following by anode oxidation treatment to form aluminum oxide as the deposited layer.  
   
   
       11 . The method as recited in  claim 1 , wherein the ultraviolet lamp is a cold cathode lamp or optical fiber illuminant.  
   
   
       12 . A method for manufacturing a shaft, comprising the steps of: 
 providing a shaft;    coating a photoresist on a surface of the shaft;    providing an ultraviolet lamp having at least one pattern of groove as a mask and performing an exposure process to the shaft;    removing the photoresist to expose portions of surface of the shaft by a developer; and    etching the exposed portions of the surface of the shaft to form at least one groove on the shaft.    
   
   
       13 . The method as recited in  claim 12 , wherein the photoresist is a positive photoresist, and wherein the ultraviolet lamp emits ultraviolet light having the wavelength ranging from 350 nm to 450 nm, the pattern of groove is transparent to the ultraviolet light, while the other portion of the mask is opaque.  
   
   
       14 . The method as recited in  claim 12 , wherein the photoresist is a negative photoresist, and wherein the ultraviolet lamp emits ultraviolet light having the wavelength ranging from 350 nm to 450 nm, the pattern of groove is opaque to the ultraviolet light, while the other portion of the mask is transparent.  
   
   
       15 . The method as recited in  claim 12 , wherein the groove comprises V shape, fishbone, chevron or twill pattern.  
   
   
       16 . The method as recited in  claim 12 , wherein the shaft comprises copper, brass, bronze, aluminum or alloys thereof.  
   
   
       17 . A method for manufacturing a shaft, comprising the steps of: 
 providing a shaft;    coating a photoresist on a surface of the shaft;    providing an ultraviolet lamp having at least one pattern of groove as a mask and performing an exposure process to the shaft;    removing the photoresist to expose portions of surface of the shaft by a developer; and    forming deposited layers on the exposed portions of the inner wall so that at least one groove is formed between the two adjacent deposited layers.    
   
   
       18 . The method as recited in  claim 17 , wherein the groove comprises V shape, fishbone, chevron or twill pattern.  
   
   
       19 . The method as recited in  claim 17 , wherein the shaft comprises copper, brass, bronze, aluminum or alloys thereof.  
   
   
       20 . The method as recited in  claim 17 , wherein the photoresist is a positive photoresist, and wherein the ultraviolet lamp emits ultraviolet light having the wavelength ranging from 350 nm to 450 nm, the pattern of groove is opaque to the ultraviolet light, while the other portion of the mask is transparent.  
   
   
       21 . The method as recited in  claim 17 , wherein the photoresist is a negative photoresist, and wherein the ultraviolet lamp emits ultraviolet light having the wavelength ranging from 350 nm to 450 nm, the pattern of groove is transparent to the ultraviolet light, while the other portion of the mask is opaque.  
   
   
       22 . The method as recited in  claim 17 , wherein the deposited layer is formed by electroplating, sputtering, and a chemical reaction.  
   
   
       23 . The method as recited in  claim 22 , wherein the deposited layer comprises nickel-cobalt alloy, nickel-phosphor alloy, nickel-cobalt-phosphor alloy or a wear resistant material.  
   
   
       24 . The method as recited in  claim 22 , wherein the chemical reaction is dipping the bearing in oxalic acid solvent following by anode oxidation treatment to form aluminum oxide as the deposited layer.