Mechanism for forming spring pitch

Details Mechanism for forming spring pitch Mechanism for forming spring pitch

1993-03-10

1993-11-09

Larson, Lowell A.

Metal deforming

By deflecting successively-presented portions of work during...

To form helical coil or tube

72140, 72442, 72452, B21F 302

Patent

active

052592260

ABSTRACT:
A spring manufacturing apparatus has a first mode in which a spring pitch is formed by inserting a wedge tool between coils of a wire material forcibly bent by a point tool, and a second mode in which the spring pitch is formed by pushing the bent wire material in a lateral direction. The first and second modes share the same driving source. The direction in which the wedge tool moves in the first mode and that in which the wire material is pushed in the second mode are substantially at right angles to each other, and therefore driving force in the first mode can be used also in the second mode by mounting on the apparatus a member that converts the direction of motion.

REFERENCES:
patent: 3427838 (1969-02-01), Rimmer
patent: 3456470 (1969-07-01), Dawes
patent: 3934445 (1976-01-01), Lampietti
patent: 4173135 (1979-11-01), Lamperti
patent: 4302959 (1981-12-01), Yakovlev et al.
patent: 4393678 (1983-07-01), Favot et al.
patent: 4873854 (1989-10-01), Russell et al.

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