Grinding apparatus, method of manufacturing rolling bearing, method of manufacturing vehicle and method of manufacturing machine

Abstract

A grinding apparatus includes: a grinding stone in which an outer circumferential surface thereof is pressed against the workpiece while being rotated and driven; and a fluid injection apparatus that has a fluid injection nozzle including an injection port from which a fluid is injected to the outer circumferential surface of the grinding stone, and a grinding oil supply apparatus that supplies a grinding oil to a processing point and that includes a grinding oil supply nozzle separate from the fluid injection nozzle, the processing point being an abutting section of the grinding stone and the workpiece, wherein the injection port is arranged so as to face the outer circumferential surface of the grinding stone in a state capable of injecting the fluid to a position different from the processing point in a radial direction of the grinding stone among the outer circumferential surface of the grinding stone.

What is claimed is: 
     
         1 . A grinding apparatus for performing grinding process on a workpiece, the grinding apparatus comprising:
 a grinding stone in which an outer circumferential surface thereof is pressed against the workpiece while being rotated and driven; and   a fluid injection apparatus that has a fluid injection nozzle including an injection port from which a fluid is injected to the outer circumferential surface of the grinding stone, and   a grinding oil supply apparatus that supplies a grinding oil to a processing point and that includes a grinding oil supply nozzle separate from the fluid injection nozzle, the processing point being an abutting section of the grinding stone and the workpiece,   wherein the injection port is arranged so as to face the outer circumferential surface of the grinding stone in a state capable of injecting the fluid to a position different from the processing point in a radial direction of the grinding stone among the outer circumferential surface of the grinding stone.   
     
     
         2 . The grinding apparatus according to  claim 1 ,
 wherein the workpiece is a ring shaped member.   
     
     
         3 . The grinding apparatus according to  claim 1 ,
 wherein the grinding stone is disposed at an inner diameter side of the workpiece and grinds an inner circumferential surface of the workpiece.   
     
     
         4 . The grinding apparatus according to  claim 1 ,
 wherein the grinding stone is disposed at an outside of an outer circumferential surface of the workpiece and grinds the outer circumferential surface of the workpiece.   
     
     
         5 . The grinding apparatus according to  claim 1 ,
 wherein a plurality of injection ports are provided while being separated with each other in an axial direction of the workpiece.   
     
     
         6 . The grinding apparatus according to  claim 1 ,
 wherein the injection port faces the outer circumferential surface of the grinding stone at a position opposite to the processing point in the radial direction of the grinding stone.   
     
     
         7 . The grinding apparatus according to  claim 1 ,
 wherein the fluid injection nozzle is disposed between the outer circumferential surface of the grinding stone and the inner circumferential surface of the workpiece.   
     
     
         8 . The grinding apparatus according to  claim 1 ,
 wherein the fluid is injected from the injection port at a uniform pressure.   
     
     
         9 . The grinding apparatus according to  claim 1 ,
 wherein a cross-sectional shape on a virtual plane including a central axis of the grinding stone at a surface of the fluid injection nozzle on a side the injection port is formed has a shape corresponding to a generating line shape of the grinding stone.   
     
     
         10 . The grinding apparatus according to  claim 1 ,
 wherein the injection port is formed so that a tangential plane, including a point at which a central axis of the injection port meet with the outer circumferential surface of the grinding stone, and the central axis of the injection port is perpendicular to each other.   
     
     
         11 . The grinding apparatus according to  claim 1 ,
 wherein the fluid is grinding oil, and   the grinding oil supply apparatus and the fluid injection apparatus share a common pump.   
     
     
         12 . The grinding apparatus according to  claim 11 ,
 wherein the fluid injection apparatus comprises a high pressure pump disposed downstream from the common pump and configured to pressurize grinding oil pumped from the common pump.   
     
     
         13 . A method of manufacturing a rolling bearing that uses the grinding apparatus according to  claim 1 . 
     
     
         14 . A method of manufacturing a vehicle that uses the grinding apparatus according to  claim 1 . 
     
     
         15 . A method of manufacturing a machine that uses the grinding apparatus according to  claim 1 .