The invention discloses a method for producing modifications, such as twists, on the tooth flanks of an internally-toothed workpiece by an externally-toothed tool. In order to carry out such a method also with machine tools, which have a reduced number of adjustable axes, the invention provides that the tool is dressed by arranging an internally-toothed dressing tool on the workpiece spindle of the machine tool at the position intended for the workpiece to be respectively honed and by bringing the dressing tool into engagement with the tool to be dressed. The width of the teeth of the dressing tool is smaller than the width of the tool to be dressed such that the dressing tool must be moved by a length along the workpiece longitudinal axis which corresponds to a multiple of the width of the teeth of the dressing tool. Subsequently, the fine machining of the workpiece takes place with the tool dressed in this manner. According to the invention, an axis cross angle is set for the dressing, which is maintained unchanged during the dressing. The respective tooth flank modification is then produced during dressing exclusively by movements of the dressing tool along the workpiece longitudinal axis and the workpiece transverse axis.

The invention relates to a method for modifying the geometry of gear wheel tooth flanks with a tool with a toothing that engages with the gear wheel during a precision machining. A varied profile is produced on the tool over the width of the tool, in that during a dressing procedure a dressing wheel is moved along the tooth flank of the tooth to be dressed. The width of the teeth of the dressing wheel is much smaller than the width of the tool. In order to cover the width of the tool a length must be covered corresponding to a multiple of the width of the teeth of the dressing wheel. After the dressing, the precision machining of the gear wheel is carried out with the tool. Since the dressing wheel is moved with a changing pitch and a changing crossed axes angle relative to the tool, the modification of the tooth flank geometry can be reproduced in the tool. A modification of the crossed axes angle dependent on the helical angle of the tool takes place with equalization of the helical angle of the tool changing over the width of the teeth of the tool.

A method and a device for the fine-machining of a toothed workpiece with a toothed finishing tool (10) which meshes with the workpiece in mutual tooth engagement are, for the purpose of producing conically modified tooth flanks, designed according to the invention in such a way that in the dressing process the finishing tool (10) and the dressing tool (11) are set at a position of reduced center distance (a) that is offset from a position of maximum center distance.

A method for dressing a honing tool using a dressing tool which during the dressing operation rolls at an axial intersection angle with the honing tool. The teeth thereof which move into engagement with the teeth of the dressing tool each have an upper face which is intended to be dressed and tooth flanks which are also to be dressed.

A method for the grinding finish machining of an already toothed gearwheel workpiece in an NC-controlled machine tool, comprising the following steps: a. providing the gearwheel workpiece in the machine tool, b. providing a first grinding tool in the machine tool, c. providing a second grinding tool in the machine tool, d. grinding machining of at least one tooth flank of the gearwheel workpiece using the first grinding tool, e. grinding machining of at least one tooth flank in the transition region to the tooth head of the gearwheel workpiece using the second grinding tool in the machine tool to generate a head edge rounding on the gearwheel workpiece, f. further grinding machining of at least one tooth flank of the gearwheel workpiece using the first grinding tool and/or the second grinding tool in the machine tool.

A method for hard finishing two different toothings on a workpiece, wherein, prior to each machining process, to set the correct tool engagement position for the machining process, a first relative rotational angle position of a first rotational position reference of the first toothing is determined relative to an axial rotational position of the workpiece spindle holding and clamping the workpiece for the first machining, and a second relative rotational angle position of a second rotational position reference of the second toothing is determined relative to an axial rotational position of a workpiece spindle holding and clamping the workpiece for the second machining, wherein the machining operations are carried out on the same workpiece spindle with no intervening clamping change, and with the first and second rotational position references coupled to each other as the basis thereof.

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 inspecting a dressable worm grinding wheel, having the following method steps: providing a dressable worm grinding wheel in a machine tool, wherein the worm grinding wheel has at least one worm thread and wherein the machine tool comprises a dressing tool for dressing the worm grinding wheel; traveling along a thread head of the worm thread in contact with a region of the dressing tool; measuring and analyzing at least one signal during the travel along the thread head, which is characteristic for the contact between the dressing tool and the thread head of the worm thread, such as a contact force, a displacement, a structure-borne noise, a power consumption of a drive, or the like.

The invention relates to a tool for dressing or cutting teeth of fine machining tools, which tool makes it possible to exactly reproduce, in a simple manner, the required tooth system geometry on the fine machining tool which is to be dressed or in which teeth are to be cut. The tool is annular and has a set of internal teeth, the teeth of which mesh, during the tooth-cutting or dressing operation, with the set of external teeth of the fine machining tool in which teeth are to be cut or which is to be dressed. At the same time, the tool has a central longitudinal axis, which extends through the centre point of the opening surrounded by the tool. According to the invention, the set of internal teeth is now formed on a ring element, which is at most 5 mm thick and is produced from a diamond material. The teeth of the set of internal teeth have cutting edges, by means of which said teeth remove material of the fine tool during the tooth-cutting or dressing machining process. The ring element is supported by a support ring, on which at least one support element associated with the support ring opening of the support ring is provided. The ring element is supported on said support element. The teeth of the set of internal teeth formed on the ring element protrude beyond the edge of the support element facing the support ring opening at least over part of the length of the cutting edges of said teeth in the direction of the central longitudinal axis of the tool.

A method for the grinding finish machining of an already toothed gearwheel workpiece in an NC-controlled machine tool, comprising the following steps: a. providing the gearwheel workpiece in the machine tool, b. providing a first grinding tool in the machine tool, c. providing a second grinding tool in the machine tool, d. grinding machining of at least one tooth flank of the gearwheel workpiece using the first grinding tool, e. grinding machining of at least one tooth flank in the transition region to the tooth head of the gearwheel workpiece using the second grinding tool in the machine tool to generate a head edge rounding on the gearwheel workpiece, f. further grinding machining of at least one tooth flank of the gearwheel workpiece using the first grinding tool and/or the second grinding tool in the machine tool.