Opening apparatus having an alignment system for producing a con

Metal deforming – With use of optical or transparent means

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Details

72176, 72257, B21C 3502

Patent

active

054068185

ABSTRACT:
Twin metal billets are fed to dual circumferential grooves formed in a rotating wheel. The billets are advanced first to a wedge-shaped gap which deforms the billets and are then advanced to a die. The die has a die opening with a circumferentially discontinuous, annular cross-section. The metal from each billet merges in the die opening and exits therefrom in the form of a slit tube. The tube is then opened and flattened to form a flat strip by advancing the slit tube over a forming member having a progressively increasing width. As the tube is advanced over the forming member, an alignment system maintaining the tube in a centered position. The alignment system includes a light source disposed within the tube and two arrays of photo-transistors arranged to receive light from the light source, the amount of light sensed by each array being a function of the position of the slit in the tube relative to a desired position. Any difference results in a steering roll which is in contact with the outer surface of the tube being pivoted in a direction which will bring the tube back into alignment.

REFERENCES:
patent: 1423361 (1922-07-01), Rockwell
patent: 1811374 (1931-06-01), Watkins
patent: 2133874 (1938-10-01), Sparks
patent: 3664561 (1972-05-01), Feiertag
patent: 4564347 (1986-01-01), Vaughan
patent: 4823586 (1989-04-01), Sinha et al.

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