A MACHINE FOR CHAMFERING THE SHARP EDGES OF THE TEETH OF ANNULAR GEARS

摘要

The machine includes freely-rotatable means (36, 38) for supporting the gear (10) to be worked. A drive gear (48) is arranged to mesh with the gear (10) to be worked and the end edges are chamfered by means of a hob (18) which meshes with the gear (10) to be worked like a worm screw and is arranged so that its cutting edges interfere with the end edges to be chamfered. The drive gear (48) and the hob (18) are interconnected by a positive transmission system (56) driven by a common motor (54) and geared so as to rotate the gear (10) to be worked and the hob (18) in synchronism. Preferably, the machine includes a pair of hobs (18) connected so as to rotate in unison and arranged to engage the end edges to be chamfered on respective opposite faces of the gear (10) to be worked.