Roll-shape configuration method of ultra-wide six-roll variable-crown cold continuous rolling mill

Abstract

The invention provides a roll-shape configuration method of an ultra-wide six-roll variable-crown cold continuous rolling mill. The method adopts a configuration scheme of a small-side-wave control working roll shape, a continuously-variable-crown middle roll shape and a variable-crown supporting roll shape, wherein the design of the small-side-wave control working roll shape eliminates local wave shapes by reducing the screw-down rate of the edge part of band steel; the continuously-variable-crown middle roll shape mainly controls symmetric secondary wave shapes; and the variable-crown supporting roll shape can lead the contact pressure among rolls to be uniform so as to improve the self retainability of the roll shape. By utilization of the roll-shape configuration method provided by the invention, the wave-shaped problem in the process of producing the ultra-wide six-roll variable-crown cold continuous rolling mill can be obviously solved and the quality of a plate shape can be improved.

Description

technical field [0001] The invention relates to a roll configuration method of a six-high cold tandem cold rolling mill in the ultra-broad steel cold rolling process, and belongs to the technical field of strip rolling strip shape control. Background technique [0002] Before 2000, except Baosteel's 2030mm cold tandem cold rolling mill, the body length of the work rolls of other cold rolling mills was below 1800mm. In recent years, many sets of tandem cold rolling mills have been newly built in my country, some of which have a rollable width of more than 1800mm, and are called ultra-wide strip tandem cold rolling mills. Due to the low transverse rigidity of the traditional four-high tandem cold rolling mill and few means of strip shape control, it is difficult to meet the quality requirements of wide-width strip rolling. A six-high machine with rich strip shape control means is adopted, such as CVC and UCM series rolling mills. [0003] (1) Common roll shape configuration ...

AI Technical Summary

Problems solved by technology

The UCM machine has higher lateral stiffness of the roll gap, but the crown adjustment ability is generally not as strong as that of the six-high CVC mill. Especially for the ultra-wide mill, the range of strip width that can be rolled is large, and the roll shifting stroke of the middle roll of the UCM mill is proposed. higher requirement

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