Chamfer hob and method of use thereof

Details Chamfer hob and method of use thereof Chamfer hob and method of use thereof

2005-09-06

2005-09-06

Banks, Derris H. (Department: 3722)

Gear cutting, milling, or planing

Gear cutting

Gear tooth shape generating

C409S011000, C407S023000

Reexamination Certificate

active

06939093

ABSTRACT:
A chamfer hob for and a method of providing a chamfered end and having an identical chamfer angle at both a front face and a back face of a gear including a shaft, a plurality of helical cutting vanes extending radially outwardly from the shaft, such that the radially outward surface of the cutting vanes defines a hob diameter, and a hob radius, a predetermined radial width of the desired chamfer and a depth of chamfer, such that the chamfering is done on both faces of the gear teeth ends resulting in a uniform chamfer around the periphery of the complete gear tooth. The method includes the steps of providing a blank gear die, including a gear shaft and a disk having a front face distally disposed from the gear shaft and back face proximally disposed to the gear shaft, each of the front and back faces having gear, providing a gear hob and a chamfer hob on a single hob spindle, the chamfer hob having a plurality of helical cutting vanes extending radially outwardly from the hob shaft, such that the radially outwardly extending surface of the cutting vanes, mounting the gear blank on a mount, mounting the hob spindle, including the gear hob and the chamfer hob, on a mounting device for rotation therewith, bringing the gear hob in proximity to and in contact with the edges of the gear blank so as to form gear teeth on the gear blank, bringing the chamfer hob in proximity to and in contact with the edges along the front face of the gear teeth formed in the preceding step so as to produce a uniform chamfer around the edges of the gear teeth and bringing the gear hob in proximity to and in contact with the edges along the back face of the gear teeth formed so as to produce a uniform chamfer around the edges of the gear teeth.

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