Patent ID: 9511477
Filing Date: 2016-12-06
CPC Classification: B23F,B24B

Claim Text:
1. A gear grinding machine for performing grinding on a gear to be machined by rotating the gear to be machined and a grinding wheel in mesh with each other, the gear grinding machine comprising: a rotary table configured to hold the gear to be machined and to rotate about a workpiece rotation axis; grinding wheel moving means for rotatably supporting the grinding wheel and moving the grinding wheel relative to the workpiece rotation axis; a ring-shaped turn table disposed coaxially with the rotary table at a position radially outside the rotary table, and supported turnably about the workpiece rotation axis; dressing means provided on the turn table and having a dresser capable of dressing the grinding wheel; table turning means for turning the turn table about the workpiece rotation axis in such a way that the dressing means moves between a dressing position where the dressing means is capable of dressing the grinding wheel supported by the grinding wheel moving means and a retreat position where the dressing means is retreated from the dressing position during the grinding; a stationary table provided radially outside the rotary table and configured to support the rotary table with the rotary table being rotatable about the workpiece axis; and an annular groove provided in a radially-outer portion of the stationary table and configured to house the turn table with the turn table being turnable.