Die for extruding toothed helical members

Details Die for extruding toothed helical members Die for extruding toothed helical members

1984-12-13

1986-11-18

Crane, Daniel C.

Metal deforming

Tool and/or tool holder

Tool comprising closed periphery deforming passageway

722531, B21C 2502

Patent

active

046228420

ABSTRACT:
A die for use in extruding helical gears includes a die orifice at the upper end of the die teeth where the extrusion blank first enters the die. Each tooth is formed with a land directed parallel to the helix on the drive and trail side of the tooth and an end face perpendicular to the helix that intersects either a transition surface, directed perpendicular to the die axis, or a land. Alternatively, the end face can extend entirely across the tooth width from one land to the other without the use of the transition surface. Relief surfaces slope inwardly from the land and provide spaces within which the extrusion blank may expand without undue frictional contact with the die.

REFERENCES:
patent: 3186210 (1965-06-01), Lesher et al.
patent: 3605475 (1971-09-01), Eakin et al.
patent: 3713323 (1973-01-01), Ivanier
patent: 3910091 (1975-10-01), Samanta
patent: 4287749 (1981-08-01), Bachrach et al.
patent: 4350865 (1982-09-01), Bachrach

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