To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. The nozzle includes a flow channel which allows supplied coolant liquid to flow into the center hole of the tool body, and discharge the coolant liquid toward the plurality of blades.

The invention relates to a method and a device for finishing toothed workpieces (2) using a tool (1) which is designed in the form of a power skiving cut-ter and is rotated by a tool spindle (17) and which has machining teeth (7) that mesh with tooth gaps (6) of the workpiece (2) in a rolling movement, said workpiece being supported by a workpiece spindle (15), which is arranged in a skewed manner relative to the tool rotational axis (4) and is driven synchronously thereto, such that machining edges (8) of the machining teeth (7) machine the tooth flanks (9) of the teeth (5) of the workpiece (2) in the direction of the tooth flank extension. According to the invention, the tool is used such that the machining edges (8) machine the tooth flanks (9) so as to only grind same without removing chips, wherein for this purpose the rounding radius of the machining edges (8) is greater than the chip thickness or cutting depth (E).

The invention relates to a method and a device for finishing toothed workpieces (2) using a tool (1) which is designed in the form of a power skiving cut-ter and is rotated by a tool spindle (17) and which has machining teeth (7) that mesh with tooth gaps (6) of the workpiece (2) in a rolling movement, said workpiece being supported by a workpiece spindle (15), which is arranged in a skewed manner relative to the tool rotational axis (4) and is driven synchronously thereto, such that machining edges (8) of the machining teeth (7) machine the tooth flanks (9) of the teeth (5) of the workpiece (2) in the direction of the tooth flank extension. According to the invention, the tool is used such that the machining edges (8) machine the tooth flanks (9) so as to only grind same without removing chips, wherein for this purpose the rounding radius of the machining edges (8) is greater than the chip thickness or cutting depth (E).

The invention relates to a skiving tool which is designed as a disposable tool and which includes a first front side, a second front side, a toothing formed on its circumference and having teeth. The front surfaces assigned to the first front side are each delimited by a first cutting edge, as well as a coupling device for coupling the skiving tool to a tool spindle of a skiving machine. In order to enable an extended use in the case of such a skiving tool, the invention provides that the skiving tool has the basic shape of a cylindrical disc, that the front surfaces of the teeth assigned to the second front side are each delimited by a second cutting edge, and that the coupling device for use enables coupling of the skiving tool to the tool spindle such that the cutting edges assigned to its first front side come into engagement with the gear wheel to be processed, and enables coupling of the skiving tool to the tool spindle such that the cutting edges assigned to its second front side come into engagement with the gear wheel to be processed. During use, when the first cutting edges have reached their wear limit, the skiving tool is turned and skiving processing is continued with the same skiving tool until the second cutting edges have also reached their wear limit.

A gear machining device is provided which can machine an accurate gear by a cutting process by synchronously rotating a machining tool and a workpiece at a high speed. A machining tool includes roughing cutting teeth for roughing bottom lands and right and left side faces of teeth of a gear, right side face finishing cutting teeth for finishing the right side faces of the teeth, and left side face finishing cutting teeth for finishing the left side faces of the teeth. The cutting teeth thus cut different parts of the teeth of the gear. This can reduce cutting resistance and suppress self-vibration during the cutting process, thereby improving tooth trace accuracy of the gear.

The invention relates to a method for machining a toothing, wherein to form a chamfer on a tooth edge formed between an end face of the toothing and a tooth flank belonging to a tooth space of the toothing, material is removed from the tooth edge by cutting, by means of a machining tool equipped with a cutting edge, in a machining operation, wherein the machining tool is toothed and the machining operation is a skiving machining operation at an axis intersection angle between the rotational axes of the machining tool and the toothing, which does not extend beyond the tooth root section of the tooth space

The invention relates to a method for machining a toothing, wherein to form a chamfer on a tooth edge formed between an end face of the toothing and a tooth flank belonging to a tooth space of the toothing, material is removed from the tooth edge by cutting, by means of a machining tool equipped with a cutting edge, in a machining operation, wherein the machining tool is toothed and the machining operation is a skiving machining operation at an axis intersection angle between the rotational axes of the machining tool and the toothing, which does not extend beyond the tooth root section of the tooth space

A method for providing teeth on working gears by cutting, wherein the working gear and the cutting tool are driven in rotation at a predetermined speed ratio along axes oriented at an intersection angle. The flanks of the cutting teeth form edges having flank cutting sections arranged on the edges of a gap between two adjacent teeth and extend along a first contour line, and which as a result of an advance in the direction of the working gear engage in a cutting manner to produce teeth having a flank contour predetermined by the shape of the cutting edge. Each of the flank cutting sections is adjoined by a tip cutting section which extends along a second contour line in the region of the base of the cutting tooth gap, wherein the second contour line is curved such that at least partially rounded tooth tips are produced on the teeth.

A method for providing teeth on working gears by cutting, wherein the working gear and the cutting tool are driven in rotation at a predetermined speed ratio along axes oriented at an intersection angle. The flanks of the cutting teeth form edges having flank cutting sections arranged on the edges of a gap between two adjacent teeth and extend along a first contour line, and which as a result of an advance in the direction of the working gear engage in a cutting manner to produce teeth having a flank contour predetermined by the shape of the cutting edge. Each of the flank cutting sections is adjoined by a tip cutting section which extends along a second contour line in the region of the base of the cutting tooth gap, wherein the second contour line is curved such that at least partially rounded tooth tips are produced on the teeth.

A tool for hob peeling rotating workpieces having pre-machined teeth comprises a gear-wheel shaped main body and tooth-shaped cutting inserts (1.2) which at the end face in the region of the tip circle are disposed on the main body. Each cutting insert comprises at least one cutting tooth. The cutting tooth forms a cutting edge (6) which runs at least along one of the flanks of the cutting tooth, and a cutting face and a clearance face. The cutting face along the cutting edge is provided with a cutting face chamfer (7) which in relation to the cutting face (5.5) runs so as to be inclined by a chamfer angle. The chamfer angle varies along the cutting edge. Moreover, the cutting edge is rounded by a radius.