Cold extrusion of externally toothed helical members

Details Cold extrusion of externally toothed helical members Cold extrusion of externally toothed helical members

1992-05-11

1994-03-22

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

2989334, B21K 130

Patent

active

052953823

ABSTRACT:
An internally toothed die which has the entire root to pitch diameter of its die tooth tip material removed in the transition zone between the land area and the trailing relieved portion; this essentially redistributes the extrusion bending forces without sacrificing helical workpiece guidance, dimensional control, or surface integrity during extrusion of an externally helically toothed gear. It provides a relieved portion that has a leading scallop with a spherical radius and a trailing portion that is linear but tangent to the spherical radius.

REFERENCES:
patent: 3599469 (1971-08-01), Bassoff
patent: 3910091 (1975-10-01), Samanta
patent: 4622842 (1986-11-01), Bachrach et al.
patent: 4878370 (1989-11-01), Fuhrman et al.

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