Abstract: The invention relates to the production of plunge-cut crown wheels having straight or linear hypocycloid as the flank longitudinal line of the teeth. The production is performed by means of a forming method in which the axial movements are coupled. Corresponding pinions can be produced using a modified hobbing method. A corresponding tapered generating wheel is used. The milling tool carries multiple cutters. The teeth of the conical virtual generating wheel are reproduced in the engagement area by the blades or blade flanks of the cutters of the milling tool.

Abstract: The invention relates to the production of plunge-cut crown wheels having straight or linear hypocycloid as the flank longitudinal line of the teeth. The production is performed by means of a forming method in which the axial movements are coupled. Corresponding pinions can be produced using a modified hobbing method. A corresponding tapered generating wheel is used. The milling tool carries multiple cutters. The teeth of the conical virtual generating wheel are reproduced in the engagement area by the blades or blade flanks of the cutters of the milling tool.

Abstract: Pitch generation method for the production of bevel gears and mainly for the rough hobbing of pinions, with working of the pinion blank during generating of the tooth profiles, using a single cutter head for working both flanks of each tooth space. The generating speeds and ratio of roll of the cutter head, as well as the profile angle of the cutters are kept uniform. The desired, curved outlines of the tooth flanks, establishing a tapering tooth space, are generated by a simple mechanism which generates the proper motions of the gear cutters. For this purpose the cutter head is pivoted, opposite the workpiece or gear blank, in a drum, for several swiveling motions.