Method of forming a coil spring

摘要

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.