A method includes the following method steps: grinding of bevel gears, wherein the respective bevel gears have a straight toothing to be ground, wherein the grinding is carried out by a disk-shaped grinding tool by discontinuous generating grinding using a predetermined rolling ratio. A cutting face of the grinding tool, which rolls during the grinding with teeth of the straight toothing of a respective bevel gear, forms a section of a hollow cone inner surface, and wherein a respective longitudinal crowning is generated on the respective straight toothing of the respective bevel gears by the grinding using the cutting face forming the section of the hollow cone inner surface. The method is distinguished in that the grinding tool is a dressable grinding tool and dressing of the grinding tool is carried out.

The invention relates to a method for producing a removal of material on a tooth end edge of a workpiece toothing with a rotationally driven chamfering tool in a machining operation brought about by controlled axial machine movements between the chamfering tool and the likewise rotationally driven workpiece toothing, wherein material is removed with a geometrically undefined cutting edge and the removal takes place in a coordinated action between a profiling, in particular, an alterable profiling, of the chamfering tool and a machine control used for the machining operation, performed in dependence on predetermined parameters that are characteristic of the removal of material to be produced.

The invention relates to a method for producing tooth flank modifications on toothing of workpieces, in which the workpiece and a tool are moved relative to one another and, as a result, material is removed from the tooth flank (3) of the workpiece. Different tooth flank modifications are generated on teeth (1) of the workpiece by means of a continuously rolling manufacturing process, by the tool comprising individually different tool profile geometries which generate the different tooth flank modifications on the teeth (1) of the workpiece. The tool can be a dresser with variable profile in order to provide, with dressable tools, individually different tool profile geometries.

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).

A method for producing a workpiece having a toothing or profiling, including the steps: a) soft machining the workpiece to produce the toothing or profiling; b) hardening the toothing or profiling; c) hard fine machining the toothing or profiling with a first tool that is a grinding worm, a grinding wheel or a honing wheel, wherein the first tool has a base body with a first elastic modulus; d) reinforcement of at least a section of the workpiece by shot blasting; and, following step d), e) repeated hard fine machining of the toothing or profiling with a second tool that is a grinding worm, a grinding wheel, a set of grinding wheels or a honing wheel. The second tool has a plastic or rubber base body with a second elastic modulus which is at most 33% of the first elastic modulus.

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 μm 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.

A method wherein a cutting or grinding chamfering tool (25) is guided along the face width of a gear (12, 23, 52) through one tooth slot (8) (e.g. from heel to toe) while it contacts the topland corners (10, 1 1) of the respective concave and convex tooth flanks of adjacent teeth (2, 4). The tool moves to an index position, the gear is indexed to the next tooth slot position and the tool moves through the tooth slot (e.g. from the toe to the heel). The cycle is repeated until all topland corners are chamfered.

A method for dressing a multi-thread grinding worm for the grinding of toothings, wherein the grinding worm includes a plurality of worm threads that are each dressed by a dressing tool with at least one dressing stroke to provide the grinding worm with a desired profile. The method includes: a) dressing a first worm thread, wherein at least one process parameter is measured and recorded during the dressing process; b) dressing a further worm thread, wherein the process parameter is measured and recorded during the dressing process; c) after dressing all worm threads: combining the recorded data of the process parameter; d) comparing the combined data of the process parameter with data stored in a machine controller and checking whether the combined data are within a predefined admissible range; e) outputting a signal if the combined data are not within the predefined admissible range.

A method for producing a workpiece having a toothing or profiling, including the steps: a) Soft machining the workpiece, in which the toothing or profiling is produced; b) Hardening the toothing or profiling; c) Hard fine machining the toothing or profiling, wherein the toothing or profiling is machined with a first tool that is a grinding worm, a grinding wheel or a honing wheel, wherein the tool has a base body with a first elastic modulus; d) Reinforcement of at least a section of the workpiece by a shot blasting process; and, following step d): e) Repeated hard fine machining of the toothing or profiling, wherein the toothing or profiling is machined with a second tool that is a grinding worm, a grinding wheel, a set of grinding wheels or a honing wheel. The second tool has a base body with a second elastic modulus which is at most 33% of the first elastic modulus. The second tool has a base body made of a plastic or rubber.

Provided are: an electroplated tool; a screw-shaped grindstone for grinding a gear; a method for manufacturing the electroplated tool; and a method for manufacturing the crew-shaped grindstone for grinding a gear. Said tool having a parent material, a plating layer that has a high-level portion and a low-level portion formed as strips on the parent material at different heights along the direction intersecting the processing direction, and electrodeposited abrasive grains exposed from the surface of the plating layer. The difference in height of the plating layer is preferably 50-100% of the average particle diameter of the abrasive grains, the width of the high-level portion of the plating layer is preferably 150-200% of the average particle diameter of the abrasive grains, and the width of the low-level portion of the plating layer is preferably 100-800% of the average particle diameter of the abrasive grains.