Method of forming a torsion bar with hexagonal heads

Details Method of forming a torsion bar with hexagonal heads Method of forming a torsion bar with hexagonal heads

1998-08-03

1999-11-09

Crane, Daniel C.

Metal deforming

With cutting

Machining after final metal-deforming

723425, 7234296, 72377, 298972, 267154, B21D 5388

Patent

active

059792094

ABSTRACT:
To make a metal torsion bar having an elongate central body connected to two hexagonal end heads via shoulders, the ends of a torsion bar blank are initially upset while hot so as to form the shoulders of the torsion bar together with cylindrical head blanks, after which each head blank is machined by removing material until the corresponding hexagonal head has been obtained.

REFERENCES:
patent: 2667558 (1954-01-01), Aeckersberg
patent: 2726307 (1955-12-01), Weaving
patent: 2836706 (1958-05-01), Cavanagh
patent: 2890325 (1959-06-01), Havlik
patent: 2953674 (1960-09-01), Grodt
patent: 4231555 (1980-11-01), Saito
patent: 5520376 (1996-05-01), Langa et al.
Boyer, Howard E., "Atlas of Fatigue Curbs" ISBN: 0-87170-214-2, American Society for Metals, p. 490, 1978.

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