Patent ID: 6520842
Filing Date: 2003-02-18
Classification: B23F

Abstract:
A method of forming tooth grooves which includes supporting a work having an annular portion with a work axis aligned with an indexing board axis of an indexing board and simultaneously forming radially extending tooth grooves at two points of an end face of the annular portion by grinding using a cup-shaped grindstone having an axis offset from the work axis while indexing the annular portion through a predetermined angle in a stepwise manner using the indexing board, the method comprising:a rough-finish processing step wherein the tooth grooves are cut by feeding the cup-shaped grindstone a predetermined amount in a stepwise manner; and a finish processing step wherein the cut tooth grooves are finished by retaining the cup-shaped grindstone at a predetermined position after the rough-finish processing step, wherein a cooling liquid is supplied from cooling-liquid ejecting bores formed in at least one of a plurality of grinding faces formed in the cup-shaped grindstone during each of the rough-finish and finish processing steps.