A method for controlling the flatness of the secondary cold rolling of a six-high UCM rolling mill

Abstract

The invention relates to a method for controlling the shape of secondary cold rolling of a six-high UCM rolling mill. (1) Optimizing the design of an end roll shape of an upper intermediate roll and an end of a lower intermediate roll opposite to the six-high UCM rolling mill; (2) Determine the amount of movement of the intermediate roll along the axial direction according to the strip width information; (3) Control the edge wave and width and middle wave of the secondary cold-rolled sheet through the cooperation of the intermediate roll shifting amount and the roll bending technology. The invention controls the shape of the strip steel by designing the end roll shape of the intermediate roll, combining the roll shifting adjustment strategy of the intermediate roll and the roll bending technology, and solves the problem of the edge wave + wide and medium wave plate shape defects in the rolling process of the ultra-thin strip steel .

Description

technical field [0001] The invention relates to the technical field of cold-rolled strip shape control, in particular to a method for controlling the shape of a secondary cold-rolled strip of a six-high UCM rolling mill. Background technique [0002] Cold-rolled strip steel is the main product of the iron and steel industry. Its production technology level and quality accuracy mark the technological development level of a country's iron and steel industry. The shape quality is an important indicator to measure the quality of cold-rolled strip. With the increasingly fierce market competition and the improvement of users' printing and coating equipment, users have higher and higher requirements for the shape of secondary cold-rolled DR materials. How to ensure the shape quality of ultra-thin DR materials has become the key to restricting the further expansion of the market. [0003] The 1220DCR unit of a factory is two UCM rolling mills, both of which are equipped with flat ro...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for controlling the shape of the secondary cold-rolled strip of a six-high UCM mill. The present invention controls the shape of the strip steel plate by designing the end roll shape of the intermediate roll, combining the roll shifting adjustment strategy of the intermediate roll and the roll bending technology. Shape, used to solve the problem of edge wave + wide middle wave plate shape defect in the rolling process of ultra-thin strip steel

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