Form cutting method

Abstract

A form cutting method includes a first cutting step of moving a semi-finishing tool having a first cutting edge in a tool feeding direction Dt orthogonal to a first axis while rotating the semi-finishing tool in a first direction about the axis to form a blade groove 120 having a contour shape of the semi-finishing tool and being continuous in the tool feeding direction Dt on a workpiece 100, and a second cutting step of moving a final finishing tool 20 having a second cutting edge 24s opposite to the semi-finishing tool in the tool feeding direction Dt while rotating the final finishing tool in a second direction R2 about a second axis O2 to finish groove inner peripheral surfaces 120x and 120y of the blade groove 120.

Dependencies are inferred from the claim text.