Drawing die for elongated twist bodies

Details Drawing die for elongated twist bodies Drawing die for elongated twist bodies

1976-09-16

1977-10-25

Mehr, Milton S.

Metal deforming

Tool and/or tool holder

Tool comprising closed periphery deforming passageway

425461, B21C 304

Patent

active

040550737

ABSTRACT:
An improved contoured orifice configuration in the interior of a forming die for manufacturing elongated twist bodies of non-circular cross-section is described. A prescribed interior portion of the orifice in the die is formed with a cross-section corresponding to the cross-section of the body. The portion of the orifice upstream of the interior forming section is similar to the interior cross-section but increases along a spiral path that terminates at the upstream end surface of the die. A localized region of the orifice immediately upstream of the interior portion extends generally tangentially to the angle of twist of the twist body.

REFERENCES:
patent: 2928528 (1960-03-01), Kelday et al.
patent: 3186210 (1965-06-01), Lesher et al.

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