Method of producing a toothed workpiece having a modified surface geometry

A method of producing a toothed workpiece by a generating method by means of a tool, comprising the steps:

• machining the workpiece using the generating method and the tool having a surface geometry comprising a first modification, wherein the first modification fulfills at least one out of:
• the first modification has, in a first direction of the tool, at least approximately a form of a linear and/or a quadratic function, with coefficients of the linear and/or quadratic functions varying in a second direction of the tool which extends perpendicular to the first direction, and
• the first modification comprises a pitch and/or a crowning that varies in dependence on an angle of rotation of the tool and/or on a tool width position;
• producing, with the first modification of the tool and the generating method, a corresponding first modification of a surface geometry of the workpiece, and
• superposing the first modification of the surface geometry of the workpiece produced by the first modification of the tool and the generating method with a second modification of the surface geometry of the workpiece, the second modification being at least one out of a profile modification and a modification caused by changing machine kinematics during the step of machining the workpiece, wherein a shape and/or a portion and/or parameters of the first modification of the surface geometry of the workpiece and of the second modification of the surface geometry of the workpiece are determined by curve fitting, comprising a step of curve fitting using a distance function which quantifies a difference between a total modification given by the superposition of the first and second modifications of the surface geometry of the workpiece and a desired modification, wherein the distance function fulfills at least one out of:
• the distance function carries out a mean value formation over a plurality of points or a total generating pattern,
• the distance function depends on a rolling distance and the workpiece width position, and
• the distance function is a weighted distance function that weights deviations in at least a first region of the workpiece more than deviations in at least a second region of the workpiece.

A method of producing a toothed workpiece by a generating method by means of a tool, the tool having an axis of rotation extending in an axial direction and a tool width direction extending parallel to the axial direction, the method comprising the steps:

• machining the workpiece using the generating method and the tool having a surface geometry comprising a first modification, wherein the first modification fulfills at least one out of:
• the first modification has, in a first direction of the tool extending at an angle ρFS≠0 with respect to the tool width direction, at least approximately a form of a linear function, with coefficients of the linear function varying in a second direction of the tool which extends perpendicular to the first direction of the tool, or
• the first modification comprises, in the first direction of the tool extending at the angle ρFS≠0 with respect to the tool width direction, a pitch that varies in dependence on an angle of rotation of the tool and/or on a tool width position;
• producing, with the first modification of the tool and the generating method, a corresponding first modification of a surface geometry of the workpiece, and
• superposing the first modification of the surface geometry of the workpiece produced by the first modification of the tool and the generating method with a second modification of the surface geometry of the workpiece, the second modification of the surface geometry of the workpiece being at least one out of a profile modification and a modification caused by changing machine kinematics during the step of machining the workpiece.