| 摘要 |
<p>A precision grinding apparatus includes a grinding worm (54) for precision grinding a case-hardened face gear (112). A shaper (18) is first placed into contact with a face gear (112), to thereby shape a surface of the face gear (112) into a plurality of face gear teeth (114). The shaper (18) is then removed, and the face gear (112) is case hardened. The grinding worm (54) is disposed in a normal orientation to the case-hardened face gear (112) and includes a spiral tooth (70, 72) extending along a perimeter of the grinding worm (54). The spiral tooth (70, 72) of the grinding worm (54) is adapted to contact and precision grind the case-hardened gear (112). A dressing tool (56) includes a protrusion (58) for contacting the spiral tooth (70, 72) of the grinding worm (54), as the spiral tooth (70, 72) contacts and precision grinds the case-hardened face gear (112). The dressing tool (56) thus maintains the shape of the grinding worm (54) to within a desired tolerance range.</p> |
