Configuration method of medium and heavy plate roll system with consideration of both rolling stability and cross-section shape

Abstract

The invention relates to a configuration method of a medium and heavy plate roll system with consideration of both rolling stability and cross-section shape, in particular to a fit way between a working roll and a supporting roll in different periods of service life of medium and heavy plate supporting roll. By comprehensively considering the impacts of a roll gap on the rolling stability and influencing factors of cross-section shape control, the invention provides the following scheme: the six-time polynomial curve supporting roll with big roll diameter at the middle and small roll diameterat two ends is adopted on a medium and heavy plate mill, and the six-time polynomial curve working roll with the small roll diameter at the middle and the big roll diameter at two ends is adopted formatching with the supporting roll; and the six-time polynomial curve working roll with the big roll diameter at the middle and the small roll diameter at two ends is adopted for matching with the supporting roll after abrasion during the later stage of the service life of the supporting roll. The configuration method of the roll system can solve the contradiction between the stability of medium and heavy plate rolling and the control of the cross-section shape, and the field application can obtain significant effects.

Description

Technical field: [0001] The invention relates to metallurgical machinery, automation and rolling technology. Specifically, it refers to a method that takes into account both the stability of medium and heavy plate rolling and the control of cross-sectional shape. Background technique: [0002] The cross-sectional shape of the strip is a main quality index of the medium and heavy plate and an important factor determining its market competitiveness, and the rolling stability is a restrictive condition for the smooth production. Taking into account the rolling stability and the cross-sectional shape control More and more attention is paid to modern plate production. Convexity is an important indicator of the cross-sectional shape of the strip steel, which is defined as the difference between the thickness of the midpoint of the strip steel and the average thickness of both sides (generally, 15mm, 40mm, etc. from the edge can be selected). In the actual production process, the...

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Problems solved by technology

[0008] Aiming at the shortcoming that it is difficult to balance the rolling stability and cross-sectional shape control of the plate rolling mill, the present invention proposes a new roll system configuration method for the plate rolling mill. According to the characteristics of the plate rolling technology, the working rolls are required to be The back-up rolls undertake different tasks in the rolling process, and use the newly designed configuration method to solve the contradiction between rolling stability and cross-sectional shape control, so as to meet the needs of medium and heavy plate rolling mills for product quality and smooth production

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