Method of making roll-finished gears

Details Method of making roll-finished gears Method of making roll-finished gears

1992-05-11

1993-07-27

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With cutting of work or product

72108, B21H 502

Patent

active

052302342

ABSTRACT:
A method of preparing a gear blank for roll-finishing, essentially comprising the step of: while supporting a gear blank with pitch-line chucking, finish-sizing the central axial opening of the gear blank to a desired concentricity to promote accurate subsequent roll-finishing. Also, a method of making roll-finished gears, comprising: (a) preparing a near-net-shape gear blank, with external gear teeth and a central axial opening, by intimately engaging and supporting the gear blank between two opposing roll-finishing gear dies, without teeth finishing pressure; (b) finish-sizing the sides of said axial opening to attain a concentricity between the gear blank's intended tooth pitch circle and said sized sides that is within the range of 0.001 inch TIR; and (c) inserting a snugly fitting arbor into said opening and completing roll-finishing of the gear blank by progressively bringing the roll-finishing dies together to exert teeth finishing pressure and rotating said dies to form the desired gear teeth on said gear blank.

REFERENCES:
patent: 3362059 (1968-01-01), Di Ponio et al.
patent: 3599463 (1968-12-01), Sennstrom

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