Apparatus for forming coil springs

Details Apparatus for forming coil springs Apparatus for forming coil springs

1988-03-16

1990-01-16

Combs, E. Michael

Metal deforming

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

To form helical coil or tube

72138, B21F 302, B21F 3502

Patent

active

048934917

ABSTRACT:
A method of forming coil springs by means of a single forming tool comprising the steps of bending a wire feed from a quill by applying a forming surface of the tip of a forming tool to the wire fed, forming a straight portion be separating the forming surface from the wire, changing the direction of the forming surface by rotating the forming tool about the axis of the quill, and again applying the forming surface to the wire to bend it in a different direction. Subsequently, these steps are repeated to form a coil spring having hook portions and a coiled portion of predetermined configuration and size. In accordance with the present invention, since a single tool is used for a variety of tools, a simplified apparatus can be provided.

REFERENCES:
patent: 2134469 (1938-10-01), Bergevin
patent: 3493016 (1970-02-01), Ott
patent: 4227392 (1980-10-01), Itaya
patent: 4555924 (1985-12-01), Remy et al.
patent: 4665731 (1987-05-01), Yagi et al.
patent: 4799373 (1989-01-01), Benton

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