Patent Document ID: 20090282884
Application ID: 11989498
Patent Flag: 0

Claim One:
1. A method for lubricating and cooling rolls ( 3 , 4 , 5 , 6 ) and metal strip ( 2 ) during rolling in a rolling stand ( 1 ), where a lubricant ( 9 ) is applied by spraying at least on the run-in side ( 7 a ) and a coolant ( 10 ) is applied by spraying on the runout side ( 8 a ), and where the lubricant ( 9 ) and the coolant ( 10 ) consist of liquid substances with lubricating, cleaning, and inerting activity or a combination of these substances and are supplied to the underside ( 2 a ) of the metal strip ( 2 ) and/or to the upper side ( 2 b ) of the metal strip ( 2 ) and/or to the lower work roll ( 4 ) of the rolling stand ( 1 ) and/or to the upper work roll ( 3 ), wherein the amount of the pure lubricant applied on the run-in side ( 7 a ) is continuously computed and metered in such a way by means of a physical computer model ( 22 ) that it corresponds to the minimal amount of lubricant that is actually needed during the rolling, and where the physical computer model for the continuous computation of the minimal amount of lubricant continuously takes into account the process data ( 23 ) of metal strip speed ( 13 ), metal strip quality ( 14 ), metal strip flatness ( 11 a, 11 b ), metal strip surface ( 26 ), and metal strip tension ( 28 ), on the run-in side ( 7 a ) of the rolling stand ( 1 ) and the process data of rolling force ( 29 ), work roll diameter ( 30 ), work roll roughness ( 31 ) and roll material ( 32 ) on the runout side ( 8 a ) of the rolling stand ( 1 ).