Patent ID: 8858297

Claim:
A gear grinding method in which rotation of a gear to be machined about a workpiece rotation axis, cutting by a grinding wheel in a radial direction of the gear to be machined, and feed of the grinding wheel in a workpiece rotation axis direction are controlled to grind the gear to be machined by the grinding wheel, the gear grinding method characterized in that the gear grinding method comprises: setting measurement points on both left and right tooth surfaces of a predetermined tooth of the gear to be machined; detecting rotation phases about a workpiece rotation axis at the measurement points; obtaining tooth thickness deviation amounts between a preset reference involute tooth surface and the measurement points, as well as tooth thickness deviation amounts between the preset reference involute tooth surface and corresponding points corresponding to the measurement points and located on both left and right tooth surfaces of all teeth other than the predetermined tooth, on the basis of the detected rotation phases; and setting an initial cutting position of the grinding wheel on the basis of the largest of the deviation amounts.