Abstract:
Disclosed is a method of grinding bevel gear teeth in a single-indexing process using a single grinding wheel provided with different bevel angles (α) to produce the desired grinding wheel radii (R): one flank is machined during grinding in downwards hobbing as far as a first turning point, another flank is produced in upwards hobbing as far as a second turning point, and machine settings are so adjusted in the turning points as to ensure a correct engagement angle and correct flank topography during the hobbing process, irrespective of the different bevel angles (α). The process combines the advantages of the known completing process, by which both flanks can be ground at the same time at the cost of imposing a particular wheel body geometry with conical teeth, with those of the known two-track process for grinding both flanks with a double grinding head, by which various additional correction factors can be introduced to optimise the flank shape for convex and concave flanks.
Abstract:
The invention relates to a profile tool for the cutting of workpieces in the form of spiral and hypoid bevel gears, in particular, for motor vehicles. The profile of said tool, engaging with the workpiece, comprises a first profile section (1), in the form of a straight edge on the tool front face; a second profile section (2), in the form of a corner radius, for generating a fillet section; a third profile section (3), in the form of a straight edge or circular cut, for generating a root relief; a fourth profile section (4), in the form of a straight edge or circular cut, for generating the primary flank and a fifth profile section (5), for the generating a tip relief, whereby the profile sections (3, 4, 5) for generating the root relief, the primary flank and the tip relief have a profile optionally radially overlaid thereon, which is an nth order polynomial.
Abstract:
The present invention pertains to the field of gear manufacture, in particular, to a method and machine for forming longitudinally curved tooth surfaces in bevel and hypoid gears. A dish-shaped grinding wheel (26) is rotated about its axis (76) and oscillated about a cradle axis (66) in a timed relationship with a relative reciprocation of a work gear (20) along cradle axis (66). The timed relationship is defined by a power series equation to permit simultaneous form grinding of adjacent tooth sides of one member of a work gear pair to be appropriately mismatched with simultaneously generated adjacent tooth sides of the mating member of the gear pair. A dish-shaped grinding wheel (176) having inner and outer stock removing surfaces (178), (180) for working opposite sides of gear teeth is also used in accordance with special timed motions of the present invention to improve contact characteristics between mating gear teeth.
Abstract:
Rotary grinding tool for straddle grinding of bevel and hypoid gears, and similar workpieces. The tool comprises two concentric grinding elements (12), (16) projecting in a common direction from one face of the tool. The tool is assembled from basic components (10), (14), (18) which can be easily disassembled. This permits accurate profile correction and surface renewal of the active grinding surfaces (20), (22) without interference with parts of the grinding wheel assembly which might otherwise be in the way of the dressing mechanimsm. In addition, the disassembled components can be used as separate grinding tools.
Abstract:
It is described a curvic coupling (400) for rotational coupling, the curvic coupling comprising: plural teeth (402, 403) arranged in a circle and protruding from a circle plane extending in a radial direction (407) and a circumferential direction (409), wherein a side surface (411) of a tooth (403) of the plural teeth is opposite to a side surface (413) of another tooth (402) of the plural teeth, wherein the tooth (403) is adjacent to the other tooth (402) and separated from the other tooth by a separating surface (404), wherein the separating surface comprises a flat surface (405) lying in the circle plane, wherein the separating surface (404) comprises a central protrusion (423) between the side surface (411) of the tooth (403) and the side surface (413) of the other tooth (402), wherein the protrusion (423) protrudes from the circle plane.
Abstract:
The invention relates to a profile tool for the cutting of workpieces in the form of spiral and hypoid bevel gears, in particular, for motor vehicles. Said profile tool comprises several profile sections in the form of curves or straight edges. A profile is optionally radially overlaid on some of these profile sections, which is an nth order polynomial.
Abstract:
Disclosed is a method of grinding bevel gear teeth in a single-indexing process using a single grinding wheel provided with different bevel angles ( alpha ) to produce the desired grinding wheel radii (R): one flank is machined during grinding in downwards hobbing as far as a first turning point, another flank is produced in upwards hobbing as far as a second turning point, and machine settings are so adjusted in the turning points as to ensure a correct engagement angle and correct flank topography during the hobbing process, irrespective of the different bevel angles ( alpha ). The process combines the advantages of the known completing process, by which both flanks can be ground at the same time at the cost of imposing a particular wheel body geometry with conical teeth, with those of the known two-track process for grinding both flanks with a double grinding head, by which various additional correction factors can be introduced to optimise the flank shape for convex and concave flanks.