Machines for forming coiled springs

Details Machines for forming coiled springs Machines for forming coiled springs

1979-12-04

1981-10-27

Combs, Ervin M.

Metal deforming

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

With cutting of work or product

72132, 72137, 140103, B21F 3502, B21F 1100, B21F 3027

Patent

active

042966213

ABSTRACT:
A wire coil spring forming machine adapted for use with thick wire prevents breakage of a thin wall in a longitudinal groove in a wire guide member or quill when forming a sharp angle bent between a coil body portion and a leading end loop portion, and permits the start of the next spring leading end loop during formation of last spring trailing end loop. A pair of radially movable members move to advanced positions where they grasp the wire portion of an already formed leading end loop just in front of the longitudinal groove. Another radially movable member abuts the loop to bend it at that point without applying the bending force to the longitudinal groove. A body holder means grasps the body after the main tool forms the trailing end loop to permit severing the semifinished spring from the material wire and bending the trailing end loop.

REFERENCES:
patent: 2134469 (1938-10-01), Bergevin
patent: 3025889 (1962-03-01), Clay
patent: 4147048 (1979-04-01), Herckelbout
patent: 4227392 (1980-10-01), Itaya
patent: 4236397 (1980-12-01), Lange

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