Abstract: A manufacturing cell for the treatment of grinding of gear wheel flanks, in particular by bevel pinions, and suggested for the wheel set testing, which includes a grinding machine (1), an unreeling test equipment (2), a laser inscription unit (3) with a time band (5) and a robot-supported load system (4), which are concatenated with one another and controllable that the process of pinion loops/wheel set examining/marking and the correction of the grinding machine attitude as a function of the results of the unreeling examination is feasible.

Abstract: A method for dressing a grinding worm that is to be used in forming a conical face gear that meshingly engages a conical involute pinion. The method employs true conjugate action between a theoretical conical involute pinion and a conical face gear to accurately position a dressing tool relative to a grinding worm.

Abstract: The process describes how transmission gears (6) can be manufactured in a highly economical and highly precise manner. In one single mounting, the complete hard fine-machining on all of the most important functional surfaces of the workpiece is conducted simultaneously. This multi-process is made possible through the combined use of a continuous generating grinding process for the machining of gearing, a known method for the machining of the boring and possibly of a frontal surface, and the fixing of workpieces (6) on form elements such as chamfers or plane surfaces by means of centering elements (9, 10) which are designed in such a way that they do not block the free access of the individual tools (5, 11, 28) to the surfaces (7, 8, 27) to be machined.

Abstract: A machine for abrading or polishing a workpiece comprises a holding surface holding the workpiece, a head member arranged along a rotation axis to rotate about the rotation axis, a working member having a surface for abrading or polishing the workpiece arranged on the head member on die rotational axis for rotation about the rotation axis with the head member, a first driving arrangement for driving a head member and the working member mounted thereon to rotate about the rotation axis, a head mounting arrangement for mounting the head member, a second driving arrangement for driving the head mounting arrangement to incline the rotation axis of the head member relative to a precession axis intersecting the rotation axis, and for moving the head member to inclined positions with the rotation axis processed about the precession axis, and a third driving arrangement for relatively moving the head mounting arrangement across the holding surface.

Abstract: A method of machining at least one tooth flank of a gear with a finishing tool. The method comprises rotating the finishing tool, such as a grinding tool, and bringing the tool and the tooth flank into contact. Relative movement between the tool and the gear is provided to traverse the tool across the tooth flank along a path whereby the path produces a tooth flank geometry of a form which, when brought into mesh with a mating tooth flank to form a tooth pair under no load or light load, provides a motion graph curve that intersects, at least two times, a motion graph curve of at least one of an immediately preceding tooth pair and an immediately following tooth pair. The motion graph curve of the tooth pair describes contact between respective tooth flanks of said tooth pair from an initial entrance into mesh to a final exit from mesh as being over a gear rotation amount of greater than 1.0 pitch and preferably, about 1.5 pitch to about 3.0 pitch.

Abstract: The process describes how transmission gears (6) can be manufactured in a highly economical and highly precise manner. In one single mounting, the complete hard fine-machining on all of the most important functional surfaces of the workpiece is conducted simultaneously. This multi-process is made possible through the combined use of a continuous generating grinding process for the machining of gearing, a known method for the machining of the boring and possibly of a frontal surface, and the fixing of workpieces (6) on form elements such as chamfers or plane surfaces by means of centering elements (9, 10) which are designed in such a way that they do not block the free access of the individual tools (5, 11, 28) to the surfaces (7, 8, 27) to be machined.

Abstract: In a method for grinding a traction surface of a half-toroidal CVT disk, there is provided a grinding machine including a hold mechanism holding the half-toroidal CVT disk having a given machining allowance, and a machining mechanism including a tool for grinding the half-toroidal CVT disk. The grinding of said grinding machine is performed in a state that one of the half-toroidal CVT disk and said tool is inclined at a predetermined angle with respect to the other.

Abstract: A method of dressing a threaded grinding wheel such that twisting of workpiece tooth flanks does not occur during grinding. The grinding wheel is preferably dressed with a circular arc hollow-crowned generating front with the generating front being described by a radius, Rb, and dressed into an axial plane of the grinding wheel. The workpiece is then relatively shifted across the grinding wheel along a feed shift vector which is oriented perpendicular to the axis of the workpiece. With this method, the effects of flank twist can be eliminated, or, a controlled amount of flank twist can be introduced not only in helical gears, but also in spur gears. The grinding wheel may also be dressed with a circular arc barrel-shaped generating front. The principles of the present invention may also be applied to hobbing tools.

Abstract: A machine (20) for lapping or testing gears comprising a single machine column (22) having a first side (24) oriented perpendicular to a second side (26) with the first side having a first workpiece spindle (28) rotatable about a first axis and the second side having a second workpiece spindle (38) rotatable about a second axis. The first workpiece spindle is movably secured to the first side and the second workpiece spindle is movably secured to the second side. The first and second workpiece spindles are movable with respect to one another along one or more of mutually perpendicular directions G, H and V. At least one, and preferably both, of the spindles are direct drive spindles. At any relative position of the spindles and their associated gear members (36, 48) along the G, H and V directions, the crossing points of their respective axes remains the same.

Abstract: In a process for finishing the hardened teeth of a bevel gear wheel by grinding after hardening, the ground teeth are fine- honed, this procedure being carried out in the same chucking as the preceding grinding. A machine especially suitable for this procedure has a chucking device for the bevel gear wheel (12) and a double machining head for mounting two machining tools, namely a grinding wheel (26) and a honing wheel (28). The bevel gear wheel (12) to be machined is preferably a pinion, and accordingly the honing wheel (28) is a bevel gear-type machining tool. Pairing the ground and honed pinion (12) with a bevel gear which has been only ground results in a good noise standard, and the lapping required for hypoid gears manufactured in the traditional way, with its associated drawbacks, is unnecessary.

Abstract: A precision grinding apparatus includes a grinding worm for precision grinding a case-hardened face gear. A shaper is first placed into contact with a face gear, to thereby shape a surface of the face gear into a plurality of face gear teeth. The shaper is then removed, and the face gear is case hardened. The grinding worm is disposed in a normal orientation to the case-hardened face gear and includes a spiral tooth extending along a perimeter of the grinding worm. The spiral tooth of the grinding worm is adapted to contact and precision grind the case-hardened gear. A dressing tool includes a protrusion for contacting the spiral tooth of the grinding worm, as the spiral tooth contacts and precision grinds the case-hardened face gear. The dressing tool thus maintains the shape of the grinding worm to within a desired tolerance range.