A method for grinding a gear toothing, in which a target value with a tolerance range is defined for the tooth width. The method includes: a) measuring the location of the surface of the tooth flanks of the gear at least two axial positions offset in the direction of the axis of rotation; b) determining the actually present allowance of the gear based on the measured values determined in step a); c) grinding the toothing by radial infeed of the grinding tool relative to the toothing, c1) wherein the radial infeed corresponds to the target value of the tooth width, if the determination under step b) indicated that such an allowance is present on all tooth flanks that material will be removed from all tooth flanks, or c2) wherein the radial infeed takes place at a value higher than the target value of the tooth width, the higher value still corresponding to the tolerance range for the tooth width, if the determination under step b) indicated that such an allowance is present on all tooth flanks that material will be removed from all tooth flanks only with increased radial infeed.

The present disclosure relates to a machining head for a gear manufacturing machine having at least one driven motor spindle and at least one counter-spindle, wherein a tool arbor having at least one tool arranged thereon is mounted between the motor spindle and the counter-spindle, and wherein at least one balancing device is integrated within the driven motor spindle and at least one balancing device is integrated within the counter-spindle.

A method for hard fine machining of teeth or a profile of a workpiece by a hard fine machining tool in a hard fine machining machine. The workpiece is clamped on a spindle and is machined by the hard fine machining tool. During or after the machining of the workpiece, at least one signal is captured by at least one sensor or a machine controller and is stored in the machine controller. In the machine controller, the measured signal or at least one variable derived therefrom is compared with stored reference data so as to check whether the measured signal or the at least one variable derived therefrom lies within a predefined tolerance. If the measured signal or the at least one variable derived therefrom lies at least partly outside the predefined tolerance, the workpiece is measured by an additional measuring device after the machining of the workpiece.

A method for grinding a gear wheel by a worm grinding wheel in a grinding machine, wherein the tooth flanks of the gear wheel are ground by the abrasive flanks of the profiling of the worm grinding wheel. In order to increase the productivity of the grinding, the method includes the following steps: a) calculating the engagement ratios between the abrasive flanks of the profiling of the worm grinding wheel and the tooth flanks of the gear wheel, wherein the size of the profile forming zone is determined; b) determining a geometry modified in respect of the geometry determined according to step a) such that the profile forming zone is minimal; c) profiling the worm grinding wheel with the geometry which has thus resulted; d) grinding the gear wheel by the worm grinding wheel profiled according to step c).

Method for cutting a gear (4) from a metal workpiece (2), in which a tooth flank, still having an oversize compared with its predefined final geometry, of the gear is, in one or more cutting passes in cutting engagement with one or more cutting tools (10) fed thereto, hard-fine finished with a geometrically undefined cutting edge made of cutting grains incorporated in a binder matrix, in order to produce a reflective property, existing in the final geometry, of its surface, wherein, in a cutting pass of a cutting tool (10b), both an elastically resilient mounting of the cutting grains set by its binder matrix acts on this surface property, and a cutting reduction of the oversize by at least 2 m at the tooth flank is realized by a compressive preload, set via the infeed of the cutting tool, to which the cutting engagement is subjected; as well as a gear-cutting tool and a machine tool for this purpose.

The present disclosure relates to a machining head for a gear manufacturing machine having at least one driven motor spindle and at least one counter-spindle, wherein a tool arbor having at least one tool arranged thereon is mounted between the motor spindle and the counter-spindle, and wherein at least one balancing device is integrated within the driven motor spindle and at least one balancing device is integrated within the counter-spindle.

A gear manufacturing apparatus for machining a gear workpiece wherein, when at least one of end regions in a tooth trace direction of each tooth of the workpiece is machined, a control device executes a specific machining control for adjusting a relative position of a tool to the workpiece based on information about the relative position computed by setting, as a machining reference position, a position of the tool on an outer edge line in an X-axis-orthogonal cross section different from a normal machining point such that a distance between a center of the tool and a center of the gear workpiece in the X-axis-orthogonal cross section when the at least one of the end regions is machined is larger than when the at least one of the end regions is machined by setting the normal machining point as the machining reference position.

A method for setting up a gear grinding process: determining axis movements and/or a geometry of a grinding tool one for multiple grinding strokes by a first quality control loop repeating the steps of grinding, measuring, and correcting for a pre-final target geometry of a gearing, which has an allowance to a final target geometry of the gearing; determining axis movements and/or a geometry of a grinding tool for one for a multiple grinding strokes by second quality control loop by repeating the steps of grinding, measuring, and correcting for the final target geometry of the gearing. The steps of grinding, measuring, and correcting are repeated on one component or on a multiple components until a gearing ground on the respective component or the respective components achieves a predetermined accuracy with respect to the pre-final target geometry and subsequently with respect to the final target geometry.

A method for rolling hard-fine machining of a toothing of a workpiece by a grinding tool, in which the grinding tool is mounted on a tool spindle and rotates while the grinding tool engages with the toothing. The grinding tool is guided relative to the toothing during machining to grind the toothing over its width. The grinding tool rotates at a non-constant rotational speed during its engagement with the toothing at least over a portion of the width. The rotational speed of the grinding tool during its engagement with the toothing has a constant basic value on which an additionally time-varying rotational speed function is superimposed, or the rotational speed of the grinding tool during its engagement with the toothing increases or decreases continuously or non-continuously over the entire width of the toothing or increases or decreases continuously or non-continuously over portions of the width of the toothing.

Method, comprising the method steps of: generating grinding of toothings (16), wherein a respective toothing (16) is machined by means of a plurality of grinding strokes and wherein a centering position for positioning a grinding tool (10) relative to the respective toothing (16) is predetermined for the grinding strokes, and adapting the centering position on the basis of a performance parameter (M2) of a workpiece spindle (6) accommodating the respective toothing (16).