The invention makes available a method for the production of gear wheels, with which it is possible to produce gear wheels having double-helical teeth, in particularly efficient manner. For this purpose, in the case of the method according to the invention for chipping production of a gear wheel, which is provided with double-helical teeth, in which the teeth of the one gear half are configured to run counter to the teeth of the other gear half, in rising manner, wherein the gear halves are arranged offset from one another by an angle amount with reference to the axis of rotation of the gear wheel, a gear wheel blank is made available, on which the teeth provided on the gear wheel are produced by means of hobbing, using a hobbing wheel, which, during hobbing machining of the teeth, in each instance, of one of the gear halves, reaches all the way into the adjacent tooth gaps of the other gear half, in each instance.

A machine tool includes a workpiece holder, a tool holder holding working tools that includes a hob cutter used in a rough machining and a skiving cutter used in a finish machining, a tool magazine, a tool replacing device replacing one of the working tools mounted on the tool holder with the other of working tools housed in the tool magazine, a rough machining controlling section performing the rough machining on the workpiece, a tool measuring device measuring a position of a blade in a rotation direction of the skiving cutter, an angle correcting section correcting a rotation angle of the skiving cutter based on a result measured by the tool measuring device, and placing a tooth space formed in the workpiece and an edge tip of the blade in a position corresponding to each other, and a finish machining controlling section by which workpiece is finish machined.

The present disclosure comprises a gear manufacturing machine comprising a workpiece holder and a tool holder, which can each be caused to rotate by means of a drive, wherein the tool holder is arranged on a machining head, which can be moved relative to the workpiece holder by one or a plurality of motion axes of the gear manufacturing machine for gear manufacturing machining a workpiece held in the workpiece holder by means of a tool held in the tool holder, the tool holder having a counterholder. According to the present disclosure the counterholder is movable by a motion axis from its working position to an inactive position and/or is arranged on the machining head of the gear manufacturing machine in a releasably connectable manner.

A designing method of a gear skiving cutter that includes: constructing a cutter manufacturing tool with a plurality of asymmetrical tooth structures and a base material for the gear skiving cutter; simulating relative movements of the cutter manufacturing tool and the base material based on multi-axes in a relative motion coordinate system to have the cutter manufacturing tool process the surface of the base material; and forming a plurality of cut teeth on the base material by the plurality of tooth structures of the cutter manufacturing tool. An outer contour of each cut tooth is designed in advance so that gear teeth on a gear workpiece with a planned grinding allowance can be formed when the gear workpiece is processed by the gear skiving cutter. The grinding allowance on either side of each gear tooth can be kept uniform, and the grinding allowance on both sides of each gear tooth can be closely the same.

The invention relates to a method and a machine tool for hard finishing toothed gearing, particularly internally toothed portions (3), in which method a toothed hard finishing tool (W) which rotates about its axis of rotation is brought into rolling machining engagement with the machined toothed gearing in one pass or in a plurality of passes of differing radial infeed depth under an advance motion with a direction component parallel to the axis of rotation (C) of the machined toothed gearing and under a non-null axis crossing angle, and material is removed from the machined toothed gearing with a tooth flank region (4a) of the machine tool gearing with tooth thickness increasing in the tooth trace direction from the end face (5) facing the machined toothed gearing.

A gear machining apparatus performs cutting work for a workpiece and generates a gear by performing a feed operation of a gear cutter relative to the workpiece along a direction of an axis of the workpiece while synchronously rotating the gear cutter and the workpiece in a state in which an axis of the gear cutter is inclined with respect to a line parallel to the axis of the workpiece. The gear machining apparatus continuously performs cutting work for a first tooth flank and cutting work for a second tooth flank during a single feed operation, and changes a correction angle between the cutting work for the first tooth flank and the cutting work for the second tooth flank.

Methods for the fabrication of metal strain wave gear flexsplines using a specialized metal additive manufacturing technique are provided. The method allows the entire flexspline to be metal printed, including all the components: the output surface with mating features, the thin wall of the cup, and the teeth integral to the flexspline. The flexspline may be used directly upon removal from the building tray.

A gear cutter tool for cutting internal gear teeth into a workpiece to form a gear is provided. The gear cutter tool is configured to rotate about a longitudinal gear cutter rotational axis. The workpiece is configured to rotate about a workpiece rotational axis. The gear cutter tool includes a gear cutter having a plurality of cutting teeth. Each cutting tooth of the plurality of cutting teeth having a tooth face that defines a cross-axis tooth angle defined between the tooth face and a line transverse to the longitudinal gear cutter rotational axis. The cross-axis tooth angle is between one and fifteen degrees. A cross-axis tool angle of the gear cutter tool defined between the longitudinal gear cutter rotational axis and the workpiece rotational axis is substantially near zero degrees.

The invention relates to a method for machining toothings, which method uses a disk-shaped, toothed tool that is rotationally driven about its axis of rotation and has a geometrically defined cutting edge. The tool teeth are produced from a base material, are provided, at least on the tooth flanks, with a coating that improves wear resistance, and have machining surfaces facing an end face of the tool, said machining surfaces being re-ground from time to time when the tool is reconditioned, wherein after at least one regrinding, use of the tool is resumed and continued with regions of the machining surfaces formed along the cutting edges from the base material.

The present disclosure discloses a method for chip-removing gear manufacturing machining of a workpiece by means of a tool, where a rotation of the tool takes place in generating coupling with a rotation of the workpiece, in particular gear manufacturing machining of a workpiece by skiving, wherein the gear manufacturing machining is carried out in a plurality of machining steps, wherein the center distance and/or a rotational angle between the workpiece and the tool superimposed on the generating coupling is/are changed between two machining steps, so that the tool will cut in the machining steps a respective contour that extends alternately closer to a first and a second flank of the target toothing of the workpiece. According to the present disclosure, the same rotational angle may be used for a plurality of machining steps taking place closer to a second flank.