Method of forming a coil spring

Details Method of forming a coil spring Method of forming a coil spring

1981-07-10

1984-04-24

Combs, E. Michael

Metal deforming

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

To form helical coil or tube

B21F 310

Patent

active

044440367

ABSTRACT:
A method of forming a coil spring wherein, an element wire transferred longitudinally is passed between a support roller and a first pressing roller and then between the support roller and a second pressing roller. Coil springs with desired diameters are formed by varying the relative positions of the support roller and the first and second pressing rollers to curve the element wire with desired curvatures. The coil is supported to prevent it from sagging due to gravity acting thereon.

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"Los Muelles" -Teoria Y Practica de la Fabricacion, Armand G. Ligier, Edited in 1967, pp. 148-149.
Extract from "Tool Engineers Handbook" Published by McGraw Hill Book Company (open to Public Inspection 2/21/69).
"Metals Handbook", vol. 4, Forming (open to Public Inspection 5/26/77)-p. 313.

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