Apparatus for a chamfer machining of a workpiece

An apparatus for a chamfer machining of a toothed workpiece comprising:

• a workpiece spindle having a workpiece holder rotatably supported about an axis of rotation for holding the toothed workpiece, the axis of rotation of the workpiece spindle defining opposing upward and downward directions with the upward direction going from the workpiece spindle toward the toothed workpiece;
• a tool spindle having a tool holder rotatably supported about an axis of rotation holding a finger mill;
• and
• a control comprising a microprocessor, the control configured to perform the following:
• travel the tool spindle along at least one linear axis of the apparatus relative to the workpiece holder to chamfer an edge of the toothed workpiece by bringing the finger mill into contact with the edge, the edge being one of an upper edge and a lower edge of the toothed workpiece, with the tool holder arranged at a radial position that is outside of a maximum outer radius of the edge of the gearing and axially below the edge if the edge is the upper edge and axially above the edge if the edge is the lower edge, and with an orientation of the axis of rotation of the tool holder extending at an angle with respect to the axis of rotation of the workpiece holder and at an angle to a plane that extends perpendicular to the axis of rotation of the workpiece holder such that the finger mill extends, starting from the tool holder, from a radially outer position axially below the edge if the edge is the upper edge and axially above the edge if the edge is the lower edge to the edge of the toothed workpiece and from there to a radially inner position in a space that is above the toothed workpiece if the edge is the upper edge and axially below the toothed workpiece if the edge is the lower edge,
• rotate the toothed workpiece held in the workpiece holder by controlling the workpiece spindle for the chamfer machining of the toothed workpiece while the finger mill engages at the edge of the toothed workpiece with a slanted orientation of the axis of the tool spindle with respect to the axis of the workpiece spindle,
• vary the rotational speed of the toothed workpiece during the chamfer machining of an individual tooth space, and machining a left tooth flank of the tooth space at a different rotational speed and/or rotational acceleration than a right tooth flank.