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

Abstract

A process is set forth for cold rolling of a metal strip, comprising: making the metal strip (18) pass through a roll gap (17) between two counter-rotating rolls (16); blowing cold and / or liquefied gas into the area of roll gap (17) by at least one nozzle (4) of a nozzle device (1); mounting a case (2) including a front top (6) partly surrounding at least one nozzle (4), wherein the front top (6) covers the nozzle device at least round the nozzle (4) of the nozzle device to prevent being effected by surrounding atmosphere so that water or ice generated round the nozzle (4) can be prevented; the front top (6) is provided with at least one opening (3), each of which aligns with the nozzle (4); heating at least one of the case (2) and the front top (6) to prevent water or ice aggradation. The invention further provides a corresponding cold roller for a metal strip.

Description

[0001] This application is a divisional application of an invention patent application with an application date of April 1, 2002, an application number of 02813383.8, and an invention title of "metal strip cold rolling method and rolling mill". technical field

[0002] The present application relates to a metal strip rolling plant and method, in particular to a metal strip cold rolling method and rolling mill. Background technique

[0003] Metal strip manufacturers are using cold rolling methods to produce metal strip with specific mechanical properties, surface properties and thickness. In the cold rolling process, the metal strip passes through a nip existing between two counter-rotating rolls in order to reduce the strip thickness and provide the required surface quality. In cold rolling operations a lot of heat is generated in the roll gap due to the friction between the rolls and the metal strip and due to deformation of the strip. This heat adversely affects the mater...

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