Resin bonded grinding wheel

Abstract

A resin bonded grinding wheel suitable for grinding polycrystalline diamond compacts is disclosed. The resin bonded grinding wheel uses a high concentration of diamonds based on a volume percent along with a mixture of hard and soft filler particles to effectively grind the polycrystalline diamond compacts while eliminating or reducing the need to continuously dress the outer surface of the resin bonded grinding wheel.

1 . A method of grinding comprising:
 contacting a polycrystalline diamond compact with a grinding wheel;   the grinding wheel comprising diamonds, a resin binder, and a mixture of hard filler particles and soft filler particles; and   wherein the diamonds comprise a diamond concentration from 175 to 225 based on volume, the resin binder comprises 30 percent to 40 percent based on volume, a ratio of hard filler particles to soft filler particles in the mixture is from 85:15 to 15:85, and the mixture of hard filler particles and soft filler particles comprises 5 percent to 30 percent based on volume.   
     
     
         2 . The method of  claim 1  wherein the ratio of hard filler particles to soft filler particles in the mixture is from 70:30 to 30:70. 
     
     
         3 . The method of  claim 1  wherein the diamonds comprise metal bond diamonds. 
     
     
         4 . The method of  claim 2  wherein the hard filler particles comprise ceramic alpha alumina and the soft filler particles comprise petroleum coke. 
     
     
         5 . An abrasive article comprising:
 a grinding wheel, the grinding wheel comprising diamonds, a resin binder, and a mixture of hard filler particles and soft filler particles; and   wherein the diamonds comprise a diamond concentration from 175 to 225 based on volume, the resin binder comprises 30 percent to 40 percent based on volume, a ratio of hard filler particles to soft filler particles in the mixture is from 85:15 to 15:85, and the mixture of hard filler particles and soft filler particles comprises 5 percent to 30 percent based on volume.   
     
     
         6 . The abrasive article of  claim 5  wherein the ratio of hard filler particles to soft filler particles in the mixture is from 70:30 to 30:70. 
     
     
         7 . The abrasive article of  claim 4  wherein the diamonds comprise metal bond diamonds. 
     
     
         8 . The abrasive article of  claim 5  wherein the hard filler particles comprise ceramic alpha alumina and the soft filler particles comprise petroleum coke.