Metal deforming – By deflecting successively-presented portions of work during... – With cutting of work or product
Patent
1986-03-28
1987-07-21
Combs, E. Michael
Metal deforming
By deflecting successively-presented portions of work during...
With cutting of work or product
72132, 72137, 140103, B21F 3502
Patent
active
046809503
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. A first forming tool bends by more than 90 degrees a first hook or a linear portion of the first hook interposed between the third forming tool and the abutment tool. These forming tools are timingly actuated by a cam mechanism.
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Abiru Norifumi
Ohbayashi Eiji
Ohdai Yozo
Asahi-Seiki Manufacturing Co., Ltd.
Combs E. Michael
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