A power train component such as a gearbox includes driving and driven, coaxially arranged cooperating gears which engage each other via teeth. The engaging end surfaces of the teeth are provided with a first chamfer and a second chamfer, in which the chamfer edge is offset from bisecting the tooth. Preferably the offset chamfer edges are provided on both a driving gear (shifter), axially positionable using a shifting fork on a shift drum, and a driven low gear. In one preferred driving gear (shifter) design, the offset chamfer edges are only provided for the side engaged when the shifting fork moves against a spring force. The invention facilitates smoother and less binding movement between the non-engaged and the engaged axial positions, such that the gear can be more easily shifted by the shifting fork in at least one direction.

A power train component such as a gearbox includes driving and driven, coaxially arranged cooperating gears which engage each other via teeth. The engaging end surfaces of the teeth are provided with a first chamfer and a second chamfer, in which the chamfer edge is offset from bisecting the tooth. Preferably the offset chamfer edges are provided on both a driving gear (shifter), axially positionable using a shifting fork on a shift drum, and a driven low gear. In one preferred driving gear (shifter) design, the offset chamfer edges are only provided for the side engaged when the shifting fork moves against a spring force. The invention facilitates smoother and less binding movement between the non-engaged and the engaged axial positions, such that the gear can be more easily shifted by the shifting fork in at least one direction.

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).

A method of manufacturing a hypoid gear includes face hobbing a gear blank and forming a green hypoid gear with gear teeth, heat treating the green hypoid gear to form a heat treated hypoid gear with heat treated gear teeth, and hard hobbing the heat treated gear teeth to form a hard finished hypoid gear. Critical non-tooth features on the heat treated hypoid gear are hard finished. Also, the critical non-tooth features on the heat treated hypoid gear can be hard finished prior to hard hobbing the heat treated gear teeth. The heat treating includes at least one of carburizing and induction hardening the green hypoid gear, a surface of the heat treated gear teeth has a hardness greater than or equal to 58 HRC, and the hard hobbing removes heat distortion from the heat treated gear teeth.

A method for deburring an internally toothed workpiece includes providing a workpiece and a deburring tool. The workpiece has an inner toothing produced by hob peeling, with first and second tooth flanks. The deburring tool has a first cutting plate and a second cutting plate, diametrically opposed to the first cutting plate. The method includes rotating the workpiece in a first rotating direction and deburring the first tooth flanks with the first cutting plate while the deburring tool is not rotating. The method also includes shifting the deburring tool relative to the workpiece such that the first cutting plate and the second cutting plate do not contact the workpiece, rotating the workpiece in a second rotating direction, opposite the first rotating direction, further shifting the deburring tool relative to the workpiece, and deburring the second tooth flanks with the second cutting plate while the deburring tool is not rotating.

A method for deburring an internally toothed workpiece includes providing a workpiece and a deburring tool. The workpiece has an inner toothing produced by hob peeling, with first and second tooth flanks. The deburring tool has a first cutting plate and a second cutting plate, diametrically opposed to the first cutting plate. The method includes rotating the workpiece in a first rotating direction and deburring the first tooth flanks with the first cutting plate while the deburring tool is not rotating. The method also includes shifting the deburring tool relative to the workpiece such that the first cutting plate and the second cutting plate do not contact the workpiece, rotating the workpiece in a second rotating direction, opposite the first rotating direction, further shifting the deburring tool relative to the workpiece, and deburring the second tooth flanks with the second cutting plate while the deburring tool is not rotating.

A method for chamfering toothed gears which enables lengthening of a life of a tool is provided. The chamfering method is for sequentially chamfering the line intersection portions 23 between tooth flanks 21 and end faces 22 of teeth 2 with end cutting edges 122. A pitch Pb of the end cutting edges 122 is set to five times a pitch Fa of the teeth 2. As a result, at a chamfering step of chamfering line intersection portions 23 of the teeth 2, a circumferential speed of the end cutting edges 122 can be made faster than a circumferential speed of the teeth 2. Consequently, a difference in circumferential speed between the end cutting edges 122 and the teeth 2 can be utilized in chamfering and thus a cutting resistance can be reduced during the chamfering. Therefore, a life of the tool 100 can be lengthened.

A method for chamfering toothed gears which enables lengthening of a life of a tool is provided. The chamfering method is for sequentially chamfering the line intersection portions 23 between tooth flanks 21 and end faces 22 of teeth 2 with end cutting edges 122. A pitch Pb of the end cutting edges 122 is set to five times a pitch Fa of the teeth 2. As a result, at a chamfering step of chamfering line intersection portions 23 of the teeth 2, a circumferential speed of the end cutting edges 122 can be made faster than a circumferential speed of the teeth 2. Consequently, a difference in circumferential speed between the end cutting edges 122 and the teeth 2 can be utilized in chamfering and thus a cutting resistance can be reduced during the chamfering. Therefore, a life of the tool 100 can be lengthened.

A method for deburring an aeronautical part with an articulated tooling including a plurality of axes of rotation, the aeronautical part including at least one edge to be deburred, the articulated tooling including a tool holder, holding a calibration tool and a machining tool, the calibration tool and the machining tool being fixed to the tool holder and being immovable relative to one another, the method including steps of calibrating the calibration tool and the machining tool, of parameterizing the aeronautical part, of deburring the at least one edge to be deburred with the machining tool moving along a predetermined trajectory, on the basis of the parameters obtained during the parameterization step.

A method and apparatus for processing a metallic workpiece with defined edges (e.g., a gear) comprises media blasting of the workpiece by directing a first media against exposed surfaces on the workpiece to increase the root strength of the gear, the blasting causing the defined edges to be radiused or mushroomed, ceasing the media blasting, loading the workpiece into a finishing apparatus, and subjecting the workpiece to a finishing process with a second media, the exposed surfaces on the workpiece being subjected to the finishing process to reduce the radiused edges on the workpiece created from the media blasting. The process of moving the workpiece to the spindle-finishing apparatus from the media blasting may be performed automatically by a machine. Once the workpiece has been subjected to the finishing process with the second media, it may be removed from the spindle-finishing machine, washed, and rinsed with rust inhibitor whereby wear properties of the workpiece are enhanced.