Abstract: A first large drive gear for slider driving mechanisms and a second large drive gear for a tool rotating driving mechanism are disposed coaxially with an axis of a wire feeding quill and in parallel with a rear surface of a front base frame panel, and a single small drive gear and a plurality of small driven gears corresponding to a plurality of wire working units are disposed around each of these large drive gears. A plurality of slider driving mechanisms and at least one tool rotating driving mechanism are operated with a single common servomotor respectively.

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.

Abstract: A method of and an apparatus for continuously and automatically forming tension springs each provided at the opposite ends with German type hooks. Several forming tools are mounted on rocker arms which swing about respective axes offset from and perpendicular to a central axis of a wire guide. A wire stock is intermittenly fed by feed rolls to a wire guide to pass the wire guide. When the wire stock is positioned in front of the wire guide, it is acted upon by the forming tools to form a first hook a body coil and a second hook. Among the tools, a second forming tool forms hooks and a body coil, and a third forming tool twists and forces a leading end of a body coil toward a position offset from a surface of coil forming on the second forming tool when a one fourth of an initial turn of the body coil is formed. A stationary abutment tool bears against the leading end of the body coil which is displaced by the third forming tool.