A process and roll stand for cold rolling of a metal strip

B - Operations – Transporting – 21 – B

Patent

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Details

B21B 45/02 (2006.01) B21B 1/28 (2006.01)

Patent

CA 2445837

A process is set forth for cold rolling of a metal strip (18), wherein the metal strip passes through a nip (17) between two counter-rotating rolls (16), driven in counter-rotation substantially at room temperature wherein a cold and/or liquefied gas, preferably an inert gas, is blown into the area of the nip or roll gap. A roll stand according to the present invention comprises two counter-rotating rolls forming a nip or rolling gap and nozzle means (1) for blowing a cold and/or liquefied gas, preferably an inert gas, through at least one orifice of said nozzle means into the area of the roll nip. Preferably, the temperature of the cold and/or liquefied gas is appreciably lower than room temperature.

L'invention concerne un procédé de laminage à froid d'une bande métallique (18), consistant à faire passer la bande métallique par un espace (17) situé entre deux cylindres contra-rotatifs (16) mis en mouvement de contra-rotation, à une température sensiblement égale à la température ambiante, et à injecter un gaz froid et/ou liquéfié, de préférence un gaz inerte, dans la zone de l'espace situé entre les cylindres. Une cage de laminage de la présente invention comprend deux cylindres contra-rotatifs séparés par un espace, et un dispositif à buses (1) qui permet d'injecter un gaz froid et/ou liquéfié, de préférence un gaz inerte, par au moins un orifice dudit dispositif à buses, dans la zone de l'espace situé entre les cylindres. La température du gaz froid et/ou liquéfié est de préférence sensiblement inférieure à la température ambiante.

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