Ultra-wide plate strip six-roll cold-rolling mill type

Abstract

The invention discloses an ultra-wide plate strip six-roll cold-rolling mill type. When a wider plate strip is rolled, an intermediate roll adopts a variable-convexity roll shape; the roll gap convexity is continuously changed by the axial movement of the intermediate roll, and the requirement on controlling the convexity of the wide plate strip and the ultra-wide plate strip can be satisfied; when a narrow plate strip is rolled, the intermediate roll is changed into an asymmetric step roll; the length range of the roll body is divided into three sections according to different diameters; the middle effective working section of the step roll adopts a common convexity roll shape; according to the width of the rolled plate strip, the intermediate roll is subjected to roll movement so as to reduce a harmful contact area between rolls; the lateral rigidity of the roll gap and the regulation efficiency of roll bending force are effectively improved; and due to the asymmetric length design of step sections on two sides, the width range of the rollable plate strip is enlarged and is two times the rollable width range of the asymmetric step roll. According to the ultra-wide plate strip six-roll cold-rolling mill type disclosed by the invention, the intermediate roll is changed to realize the hybrid mill type of the variable-convexity rolling mill and a high-rigidity roll gap rolling mill, and the rolling of the high-quality plate belt with a larger width specification span can be realized by one set of rolling mill.

Description

technical field [0001] The invention relates to a six-high cold rolling mill model used in the cold rolling process of strips. Background technique [0002] At present, the six-high cold rolling mill models widely used in the field of strip rolling mainly include the six-high CVC model of SMS company and the HC model of Japan Hitachi. [0003] (1) Six-roller CVC model [0004] At the end of the 1970s, Germany SMS company (SMS) took the lead in developing the Continuously Variable Crown (CVC) roll shape, which was applied to the four-high rolling mill and achieved great success. After more than 30 years of research and development, CVC roll shape has become one of the most important strip shape control methods in the field of strip rolling, and the six-high rolling mill with CVC roll shape as the middle roll has also become the most important six-high cold rolling mill. One of the model configurations. [0005] Four-high CVC mills adopt CVC work roll roll shape, literature...

AI Technical Summary

Problems solved by technology

Therefore, HC rolling mills are rarely used in ultra-wide strip rolling mills (rolling mills with a maximum rolling width greater than 2000mm), mainly due to the limitation of roll shifting strokes, and cannot roll strips with large width spans.

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