Continuous coil spring forming method

Details Continuous coil spring forming method Continuous coil spring forming method

1990-07-30

1992-04-21

Larson, Lowell A.

Metal deforming

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

To form helical coil or tube

140 3CA, 140 924, B21F 3502, B21F 2100

Patent

active

051056429

ABSTRACT:
Multiple coil springs, particularly springs of alternating right and left hand coils, are formed from a continuous wire, interconnected by spring heads formed of straight lengths of the wire, by a coiler having a stationary forming head which with a pair forming rollers which bend the wire to one side or the other, with the formed coils extending in the same direction from the forming head, thus producing a partially formed step-shaped spring. The partially formed spring is passed through a spin tube which damps out the alternating twists resulting from the coiling procedure. Downstream from the coiler, the partially formed spring is folded by imposing opposite 180.degree. twists to consecutive pairs of the interconnecting heads to reverse the direction of alternate ones of the coils.

REFERENCES:
patent: 3188845 (1965-06-01), Gerstorfer
patent: 4726106 (1988-02-01), Mohr

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