Patent ID: 8007551
Filing Date: 2011-08-30
Classification: B24B,F16H

Abstract:
1. A super finishing stone for performing super finishing work on a raceway surface, the super finishing stone comprising: an abrasive surface comprising a shape in which a width of the abrasive surface becomes gradually narrower from outside to inside in a radial direction of the raceway surface, the abrasive surface being formed such that if the raceway surface and the abrasive surface are in contact, then intersection angles, at a plurality of sections along the radial direction and as viewed from a direction perpendicular to the radial direction, between the abrasive surface and the raceway surface in contact with the abrasive surface at opposite side edges of the abrasive surface are constant, wherein the raceway surface comprises a flat shape at an intermediate section thereof in the radial direction as viewed from the direction perpendicular to the radial direction, wherein the raceway surface comprises a convex shape which is gradually swelled toward a center of the section as the raceway surface approaches inwardly in the radial direction, wherein the raceway surface comprises a concave shape which is gradually recessed toward a center of the section as the raceway surface approaches outwardly in the radial direction, wherein the abrasive surface comprises a flat shape at an intermediate section thereof in the radial direction as viewed from the direction perpendicular to the radial direction, wherein the abrasive surface comprises a concave shape which is gradually recessed toward a center of the section as the abrasive surface approaches inwardly in the radial direction, and wherein the abrasive surface comprises a convex shape which is gradually swelled toward a center of the section as the abrasive surface approaches outwardly in the radial direction.