초록 ▼

A precision grinding apparatus includes a grinding worm for precision grinding a case-hardened face gear. A shaper is first placed into contact with a face gear, to thereby shape a surface of the face gear into a plurality of face gear teeth. The shaper is then removed, and the face gear is case har

A precision grinding apparatus includes a grinding worm for precision grinding a case-hardened face gear. A shaper is first placed into contact with a face gear, to thereby shape a surface of the face gear into a plurality of face gear teeth. The shaper is then removed, and the face gear is case hardened. The grinding worm is disposed in a normal orientation to the case-hardened face gear and includes a spiral tooth extending along a perimeter of the grinding worm. The spiral tooth of the grinding worm is adapted to contact and precision grind the case-hardened gear. A dressing tool includes a protrusion for contacting the spiral tooth of the grinding worm, as the spiral tooth contacts and precision grinds the case-hardened face gear. The dressing tool thus maintains the shape of the grinding worm to within a desired tolerance range.

대표청구항 ▼

[ What is claimed is:] [1.] A method of precision grinding a plurality of face gear teeth on a face gear, the face gear teeth being adapted for meshing with a spur pinion, the method comprising the following steps:providing a grinding worm, the grinding worm having a rotational axis;rotating the gri

[ What is claimed is:] [1.] A method of precision grinding a plurality of face gear teeth on a face gear, the face gear teeth being adapted for meshing with a spur pinion, the method comprising the following steps:providing a grinding worm, the grinding worm having a rotational axis;rotating the grinding worm;placing the rotating grinding worm into contact with the face gear to thereby precision grind the plurality of face gear teeth;providing a dressing tool having a planar surface; andplacing the planar surface of the dressing tool into contact with the rotating grinding worm to thereby true the rotating grinding worm, an envelope generated by the dressing tool as the dressing tool contacts and grinds the rotating grinding worm approximating an envelope that the dressing tool would generate if the dressing tool were moved over a surface of a spur pinion, the placing step including a step of moving the dressing tool in a feed direction that is always substantially perpendicular to the planar surface.