Metal deforming – By deflecting successively-presented portions of work during... – To form helical coil or tube
Patent
1985-12-30
1986-11-18
Combs, E. Michael
Metal deforming
By deflecting successively-presented portions of work during...
To form helical coil or tube
140 71R, B21F 312
Patent
active
046228390
ABSTRACT:
In an apparatus for manufacturing a spring unit, a pair of movable bodies are slidably mounted on a guide rail which is extended on a frame structure. A pair of rollers are provided on the respective movable bodies and a grip mechanism is arranged on the frame. The ends of a single wire are held between the pairs of rollers and the intermediate portion of the wire is gripped by a grip mechanism so that the single wire is stretched between the movable bodies. A swing arm is axially and swingably supported on each of the movable bodies and a forming roller is pivotably fixed to the respective swing arms. A guide is arranged between the forming rollers and the rollers and a pitch rod is arranged between the guide and the forming roller. When the swing arm is swung, the forming roller is abutted against the end of the wire and when the pair of movable bodies approach each other, the wire is extracted from the holding rollers and is abutted against the forming roller, thereby spirally forming the end of the wire with the forming roller.
REFERENCES:
patent: 112868 (1871-03-01), Van Vleck
patent: 904563 (1908-11-01), Rau
patent: 3906766 (1975-09-01), Sato
patent: 3937256 (1976-02-01), Hamaguchi
patent: 3993106 (1976-11-01), Yokota
patent: 4471819 (1984-09-01), Nihashi
Iwata Yasuji
Mukai Teruo
Sasaki Noboru
Combs E. Michael
France Bed Co. Ltd.
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