Method and device for forming teeth in a workpiece gear with reduced flank line shape error

A device for producing a toothed workpiece gear comprising:

• a workpiece spindle for clamping a workpiece gear;
• a tool spindle for clamping a cutting tool having cutting teeth, each of the cutting teeth having a left and a right cutting edge;
• and
• a control device;
• wherein the tool spindle and the workpiece spindle are rotationally driven at a coupling ratio of respective angles of rotation thereof and at an axial distance from each other, so that the cutting tool simultaneously forms a left and a right tooth flank a tooth of the workpiece gear using a left and a right cutting edge in a chip-removing manner;
• wherein the control device is equipped in such a way that, by means of a radial run-out error and a pitch error of the cutting tool, which is determined before the workpiece gear is machined, the workpiece spindle and the tool spindle are driven with coupling ratio that periodically changes or an axial distance that periodically changes to reduce at least one flank line shape error of the right and left tooth flanks resulting from the radial run-out error and the pitch error;
• and
• wherein the control device is equipped in such a way that a position of the left and right cutting edges of the cutting tool clamped onto the tool spindle are measured and the left and right tooth flanks are in each case fine-machined separately in consecutive operating steps.

A device for producing a toothed workpiece gear comprising:

• a workpiece spindle for clamping a workpiece gear;
• a tool spindle for clamping a cutting tool having cutting teeth, each of the cutting teeth having a left and a right cutting edge;
• and
• a control device;
• wherein the tool spindle and the workpiece spindle are rotationally driven at a coupling ratio of respective angles of rotation thereof and at an axial distance from each other, so that the cutting tool simultaneously forms a left and a right tooth flank of a tooth of the workpiece gear using a left and a right cutting edge in a chip-removing manner;
• wherein the control device is equipped in such a way that, by means of a radial run-out error and a pitch error of the cutting tool, which is determined before the workpiece gear is machined, the workpiece spindle and the tool spindle are driven with coupling ratio that periodically changes or an axial distance that periodically changes to reduce at least one flank line shape error of the right and left tooth flanks resulting from the radial run-out error and the pitch error;
• and
• wherein a measuring tool, by means of which the position of the left and of the right cutting edge is measured, is fastened to a housing of the device.