Making of a bevel gear

Details Making of a bevel gear Making of a bevel gear

1980-07-03

1986-05-27

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72359, B21K 130

Patent

active

045907820

ABSTRACT:
A bevel gear is made by means of a die, a punch, and two concentrical counterpunches, one having a particularly contoured extension. A cylindrical blank, having a diameter not larger than the smallest bevel gear root circle, is inserted in the die; a portion is held by one counterpunch but reverse-extruded in part into the gap between that counterpunch and the advancing punch. A portion of the blank inserted into the interior of the die flows concurrently radially into the small-diameter portion of the die cavity. Subsequently, the reverse-extruded, tubular portion is forced back in parts by the second counterpunch, acting in the gap, to fill the large-diameter portion of the cavity. A tubular shaft extension may remain on the gear.

REFERENCES:
patent: 2285575 (1942-06-01), Elbertz
patent: 4008599 (1977-02-01), Dohmann

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