B - Operations – Transporting – 21 – F
Patent
B - Operations, Transporting
21
F
140/10
B21F 35/00 (2006.01) B21F 3/00 (2006.01) B21F 3/02 (2006.01) F16F 1/04 (2006.01)
Patent
CA 1309318
ABSTRACT OF THE DISCLOSURE A coil of taper wire for forming coil springs, formed by winding substantially in concentric loops a quench-hardened and tempered taper wire having a successive arrangement of taper wire segments each consisting of a thick section, two thin sections and two taper sections connecting the thin sections to the opposite ends of the thick section, respectively. The taper wire is subjected to a preforming action immediately before being wound in loops on a winding drum, to form plastic bends in the thick section and plastic bends of a radius of curvature greater than that of the plastic bends in the thick sections so that the taper wire is wound substantially uniform, concentric circular loops on a winding drum. When the taper wire is unwound from the coil and is subjected to a straightening process of a fixed straightening arrangement of a series of straightener rollers before being coiled in taper wire coil springs on a coil spring forming mill, the thick sections undergo a straightening action greater than that acts on the thin sections, so that the taper wire unwound from the coil of taper wire is straightened in a substantially straight taper wire and thereby the taper wire is coiled in taper wire coil springs having correct size and uniform shape.
542432
Katsube Kozo
Kawaguchi Yasunobu
Kawakami Heijiro
Murahashi Mamoru
Takada Susumu
Kabushiki Kaisha Kobe Seiko Sho
Katsube Kozo
Kawaguchi Yasunobu
Kawakami Heijiro
Murahashi Mamoru
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