Method for stably coiling ultrathin-specification checkered plate

Abstract

The invention relates to a method for stably coiling an ultrathin-specification checkered plate. The method comprises the following steps: if variable-thickness rolling is determined, in a stage thatthe tapping length of finish-rolled last-frame strip steel is less than a preset length, namely a stage that a wrapper roll is still used, calculating the unit tension and the total tension of a winding drum to coil the strip steel; in a stage that the tapping length of the finish-rolled last-frame strip steel exceeds the preset length, sampling the tapping thickness and the tapping width of the finish-rolled last-frame strip steel once every 10 m, taking the tapping thickness and the tapping width obtained by sampling as the initial strip steel thickness and the initial strip steel width correspondingly, and calculating the corresponding unit tension and the total tension of the winding drum; and after the sampled tapping thickness reaches the target thickness, taking the sampled tappingthickness and the sampled tapping width as the initial strip steel thickness and the initial strip steel width correspondingly, calculating the corresponding unit tension and the total tension of thewinding drum, and thus coiling the strip steel according to the calculated unit tension and the total tension of the winding drum. Width precision, roll shape and strip steel edge quality of the stripsteel can be guaranteed.

Description

technical field [0001] The invention relates to a method for stably coiling an ultra-thin checkered plate, which belongs to the technical field of hot continuous rolling. Background technique [0002] In order to tap the load-bearing potential of plate and strip materials in the service process and strive to achieve maximum material saving and weight reduction, foreign iron and steel enterprises have developed longitudinal variable thickness rolling technology. For example, Mizushima Iron and Steel Works realized in the late 1970s Planar shape automatic control method (MAS rolling method), later European and Japanese iron and steel enterprises developed and produced LP, TRB and other reduced variable thickness plates and strips, which have been successfully applied in bridges, buildings, ships, and automobiles , and achieved significant economic benefits. Domestic research on variable-thickness rolling technology is still in the exploratory stage. The main reason is that th...

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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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