A method for stable coiling of ultra-thin patterned plate

Abstract

The invention relates to a method for stably coiling an ultra-thin checker plate, comprising the following steps: if the variable thickness rolling is determined, in the stage when the tapping length of the strip steel at the end of the finishing rolling is less than the preset length, that is, the coiling roller also returns In the stage of use, in the stage after the tapping length of the finishing strip at the end of the finishing rolling exceeds the preset length, the tapping thickness and the tapping width of the finishing strip at the end of the finishing rolling are sampled every 10m, and the sampling The tapping thickness and tapping width are taken as the initial strip thickness and initial strip width, respectively, and the corresponding reel unit tension and total reel tension are calculated; until the sampled tapping thickness reaches the target thickness, the sampled tapping Thickness and tapping width are taken as the initial strip thickness and initial strip width respectively, and the corresponding reel unit tension and total reel tension are calculated, so that the strip is coiled according to the calculated reel unit tension and total reel tension. The invention can ensure the width precision, coil shape and edge quality of the strip steel.

Description

technical field [0001] The invention relates to a method for stably coiling an ultra-thin checkered plate, belonging to the technical field of hot continuous rolling. Background technique [0002] In order to tap the bearing potential of plate and strip materials during service, and strive to achieve maximum material saving and weight reduction, foreign iron and steel enterprises have developed longitudinal variable-thickness rolling technology. Plane shape automatic control method (MAS rolling method), later European and Japanese steel companies developed and produced LP, TRB and other reduced and variable thickness plates and strips, which have been successfully applied in bridges, buildings, ships, and automobiles , and achieved significant economic benefits. The domestic research on variable thickness rolling technology is still in the exploratory stage. The main reason is that the deformation mechanism of the sheet during the rolling process is very complex, and there ...

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Problems solved by technology

Domestic research on variable-thickness rolling technology is still in the exploratory stage. The main reason is that the deformation mechanism of the plate during the rolling process is very complicated, and there are many factors that restrict the accurate determination of the rolling reduction path. Meet user requirements

[0003] With the development of hot-rolled products in the direction of high strength and thinning, there are strip threading and steel throwing processes in conventional hot continuous rolling. Rolling is broken, which affects rolling stability, reduces yield, increases roll consumption, reduces effective operating rate, etc., and cannot achieve stable coiling of thin pattern plates

[0004] According to the relevant tests conducted by the applicant, although simply changing the setting of a certain parameter has a certain positive effect on the steel coil, it cannot completely avoid the defects of the produced product, and cannot guarantee stable coiling.

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