Control method for channeling of hot continuous rolling CVC working roll

Abstract

The invention discloses a control method for channeling of a hot continuous rolling CVC working roll, and belongs to the technical field of plate and strip rolling. According to the control method, the roll bending set value is periodically adjusted in the strip steel rolled in the same width in one rolling period, meanwhile, a roll shifting coordination change model is given, the working roll shifting stroke is expanded, the effect of even abrasion of the roll is achieved, and the rolling kilometers are increased; for strip steel rolled in different widths, the roll bending force of each rack is fixed, and roll shifting executes a normal stroke so as to keep the rolling stability under width jump. By the adoption of the control method, the roll shifting stroke of the working roll is increased by 30-60 mm in the same-width rolling process, and the same-width rolling kilometers are remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of strip rolling, and particularly relates to a method for controlling the shifting of work rolls in hot continuous rolling. Background technique [0002] CVC rolling mill has the characteristics of strong crown adjustment ability and rapid adjustment, but it also has the problems of serious edge wear and short rolling kilometers when rolling with the same width, which restricts the batch rolling of thin-gauge products and is not conducive to improving production efficiency . Work roll shifting means that the work rolls move laterally. The purpose of the shifting is to make the work rolls wear evenly. The variable crown work rolls can also adjust the crown of the roll gap through the shifting, so as to control the shape of the strip. Each time a strip of steel is rolled, the work rolls move laterally for a certain distance, and this distance is called the roll-shifting step. The distance from the rolling c...

AI Technical Summary

Problems solved by technology

Adopting the technical solution of the present invention effectively solves the problem that the roll shifting stroke is insufficient during rolling with the same width, and the roll shifting stroke is too large during non-same width rolling, which affects the stability of specification jumps, and at the same time reserves enough space for bending rolls. The dynamic adjustment ability can be applied to the whole stand of finishing rolling, and the roll shifting rule is controllable

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