METHOD AND DEVICE FOR CONTROLLED STRAIGHTENING AND COOLING OF WIDE METAL STRIP, ESPECIALLY STEEL STRIP OR SHEET, RUNNING OUT OF A HOT-ROLLED STRIP MILL

摘要

A method and device for controlled straightening and cooling of a wide metalstrip, especially a steel strip (1) or sheet metal, running out of a hotrolled strip rollingmill, using pinching rollers (5) arranged in the moving direction of the strip(2) behindvertical double rollers (3,4), said pinching rollers producing a tensilestress (6) actingin a longitudinal direction. According to the invention, the range of use ofconventional sheet metal cooling systems can be extended to obtain a more evensurface of said steel strip (1) with an increased cooling effect. This isachieved bydisplacing the metal strip (1) or sheet metal between a pre-straighteningmachine (7)and splash cooling facility (8) in defined conditions of tensile stress (6) byadjustingthe tensile stress (6) and by cooling said strip or sheet metal inside saidsplash coolingfacility (8) between successive pairs (5a) of pinching rollers and byadditionallycontrolling the tensile stress (6).