Method and an apparatus for producing a coiled spring

Details Method and an apparatus for producing a coiled spring Method and an apparatus for producing a coiled spring

1976-10-08

1978-04-18

Combs, E. M.

Metal deforming

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

To form helical coil or tube

72144, B21F 304

Patent

active

040844200

ABSTRACT:
The invention provides a method and an apparatus for automatic production of coiled springs, wherein the spring has close windings at both ends and rough windings with relatively large pitch in the middle portion, by shifting the supplying positions of a material wire in relation to a rotating fixed coil-supporter at varied speed in accordance with a desired winding pitch.

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