Method for gear shaping a periodic structure, in particular a toothing, and shaping machine designed therefor

A method for gear shaping a periodic structure comprising a toothing (2) on a workpiece, said method comprising:

• rotating the workpiece about a workpiece axis of rotation (C2),
• rotating a toothed gear shaping tool (8) about a tool axis of rotation (C8),
• bringing the workpiece and the shaping tool into material-removing machining engagement with one another wherein the rotating workpiece and the rotating shaping tool are in rolling contact with one another,
• removing material from the workpiece via a working stroke (A-B) of the shaping tool relative to the workpiece,
• lifting off the shaping tool from the workpiece (B-C) in a lifting direction (A2) by a maximum lifting amount,
• once the shaping tool has been lifted off of the workpiece by the maximum lifting amount, performing a return stroke (C-D) of the shaping tool relative to the workpiece,
• positioning the shaping tool relative to the workpiece (D-A) for a next working stroke,
• wherein during the return stroke, a deflection movement (δC8/δAz) of the shaping tool is superimposed on the rotation of the shaping tool, an amount of said deflection movement changing during the return stroke, and said deflection movement running transversely to the lifting direction (A2) of the shaping tool and away from an incoming flank of the rotating workpiece for said next working stroke.