Patent ID: 7431635

Claim:
A method for grinding the inner peripheral surface of a ring for the successive generation of the individual profile of each tooth of an internally toothed gear wheel, said method including the steps of: a. precisely positioning said ring on a turntable; b. imposing complex motions, at a predetermined speed relationship between said motions, on said turntable; c. actuating a rotatable, contoured, grinding wheel, via both axial and radial feeding motions as said grinding wheel enters into the inside of said ring, for said generation of said individual profile of each of said teeth; d. keeping a tip radius of said contoured grinding wheel at least substantially similar to a radius of an arc shape of said teeth; and e. continuously maintaining but a single contact line, during the actual generation of said internally toothed gear wheel, between said contoured grinding wheel and said inner peripheral surface of said ring.