Method of manufacturing a bearing

Abstract

A method of manufacturing a bearing includes, firstly, injecting a mixture of metal powder into a mold to form a semi-finished product. Then the semi-finished product is sintered. After that, the sintered semi-finished product is fine machined, and then washed, to form the bearing.

What is claimed is: 
     
         1 . A method of manufacturing a bearing, the method comprising:
 injecting a mixture of metal powder into a mold to form a semi-finished product;   sintering the semi-finished product; and   fine machining and washing the sintered semi-finished product to form the bearing.   
     
     
         2 . The method of  claim 1 , wherein forming the semi-finished product comprises pressure molding. 
     
     
         3 . The method of  claim 1 , wherein the semi-finished product is sintered in a mesh belt furnace. 
     
     
         4 . The method of  claim 1 , wherein the sintered semi-finished product is fine machined in a sealed molding chamber using a shaping machine. 
     
     
         5 . The method of  claim 1 , further comprising immersing the washed semi-finished product into oil in vacuum condition; and performing a deoiling process on the semi-finished product to separate the oil from the semi-finished product. 
     
     
         6 . The method of  claim 5 , wherein the oil is antirust oil. 
     
     
         7 . The method of  claim 5 , wherein a vacuum degree of the vacuum condition is in a range of from 0 millimeters mercury (mm Hg) to 5 mm Hg. 
     
     
         8 . The method of  claim 1 , wherein the mixture of metal powder is a mixture of copper powder and iron powder. 
     
     
         9 . The method of  claim 1 , wherein the formed bearing is configured for fixing a shaft on an impeller of a fan.