Rolling mill temperature control

Abstract

For controlling the flatness of the strip during the rolling of aluminum strip or foil, the system consists of a full width bank of cryogenic roll cooling devices acting on the roll(s) and a full width bank of roll heating devices also acting the roll(s). Both or either of the cooling and heating banks are divided into individually controllable zones. A process automation system controls the action of the cooling and heating banks via feedback from a strip shape meter and / or a predictive process model, in order, by thermal growth / contraction, to create the best roll profile for rolling flat strip.

Description

technical field [0001] This invention relates to the field of aluminum strip or foil mills and describes a new method that will improve roll temperature control, thereby improving strip flatness and bringing other safety and production benefits. Background technique [0002] The process of rolling aluminum requires lubricants to obtain a satisfactory surface finish with higher compression. However, even with lubricants, the rolling process generates a large amount of heat that must be dissipated to prevent overheating of the equipment and breakdown of the lubricating oil. Additional cooling of the rolls is therefore required. Currently, this is only possible in two ways: [0003] Small numbers of rolling mills that roll cooler aluminum strip or foil use water-based emulsions as rolling coolants and lubricants. Since water has a high cooling capacity, while the oil content can be adjusted to produce good lubricating properties, this seems to be an ideal solution. However,...

AI Technical Summary

Problems solved by technology

Flatness control of hot work rolls is mentioned, however, described as being achieved by using a combination of inert gas and conventional coolants, which in the field of aluminum rolling implies higher kerosene flow velocities and all that goes with it equipment and security issues

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