Patent ID: 9108294
Filing Date: 2015-08-18
Classification: B24B

Abstract:
1. A grinding device comprising: a spindle which is configured to be rotated; a chuck mounted on a front end of the spindle for fixedly holding a workpiece; a grinder shaft having a grinder head; a grinder mounted on the grinder head; a dresser head provided at the front end of the spindle; a dresser tool mounted on the dresser head for dressing the grinder; and a fixing ring mounted to the spindle; wherein the spindle and the grinder shaft are movable relative to each other to positions where the workpiece can be ground by the grinder with the grinder held in position with respect to the chuck; wherein the chuck is movable relative to the spindle in an axial direction of the spindle such that, when the workpiece is fixedly held by the chuck, the workpiece is movable by the chuck relative to the spindle in the axial direction of the spindle; wherein the fixing ring is configured to fix an axial position of the workpiece in the axial direction of the spindle when the workpiece is moved by the chuck in the axial direction of the spindle; wherein the fixing ring and the dresser tool are disposed at the front end of the spindle in such a manner that a front end surface of the fixing ring is positioned in an axially retracted position relative to a front end surface of the dresser tool; and wherein the dresser tool is configured such that while the workpiece is being ground by the grinder, the dresser tool is kept out of contact with the grinder, and while the grinder is being dressed by the dresser tool, the chuck is kept out of contact with the grinder.