Electro-deposited thin-blade grindstone

Abstract

To provide an electro-deposited thin-blade grindstone containing a plate-shaped base metal, depressed portions that are open from near the edge portion of the base metal to the edge portion and are formed alternately on both side surfaces of the base metal, and a number of abrasive grains fixedly deposited on the depressed portions and protruded from the side surfaces and edge portion of the base metal. The depressed portion is formed in a depth of ½ or more of the thickness of the base metal. The abrasive grain is a hard abrasive grain made of diamond, CBN or the like. The diameter of the abrasive grain is nearly equal to the thickness of the base metal.

What is claimed is:  
     
         1 . An electro-deposited thin-blade grindstone comprising: 
 a plate-shaped base metal;    depressed portions that are open from near the edge portion of the base metal to edge portion and are formed alternately on both side surfaces of the base metal; and    a number of abrasive grains deposited on the depressed portions and protruded from the side surfaces and edge portion of the base metal.    
     
     
         2 . An electro-deposited thin-blade grindstone according to  claim 1 , wherein the depressed portion is formed in a depth of ½ or more of the thickness of the base metal.  
     
     
         3 . An electro-deposited thin-blade grindstone according to  claim 1 , wherein the abrasive grain has a grain size nearly equal to the thickness of the base metal.  
     
     
         4 . An electro-deposited thin-blade grindstone according to  claim 1 , wherein a cutout in which the edge portion of the disc-shaped base metal is cut away by a predetermined amount in its radial direction is formed between the respective depressed portions adjacent to each other along the edge portion of the base metal and wherein the edge portions of the abrasive grains on the depressed portion are exposed to the cutout.  
     
     
         5 . An electro-deposited thin-blade grindstone according to  claim 1 , wherein the depressed portions that are open from near the edge portion of the disc-shaped base metal to the edge portion and are formed alternately on both the side surfaces of the base metal are formed by a chemical treatment and wherein a number of abrasive grains protruded from the side surfaces and edge portion of the base metal are fixedly electro-deposited on the depressed portions.