Self-adaptation convexity change hot rolled plate shape control model

Abstract

A self-adaptation convexity change hot rolled plate shape control model belongs to the technical field of plate and strip hot rolling process analysis and control. The self-adaptation convexity change hot rolled plate shape control model comprises a strip-loaded roller system convexity computation module, a material flatness dead zone computation module, a strip steel convexity range computation module, outlet convexity computation modules of various racks, a roller system convexity self-learning computation module, a target convexity self-learning computation module and a self-adaptation convexity correction computation module. The self-adaptation convexity change hot rolled plate shape control model has the advantages that straightness of hot rolling strip steel is acted as a priority target, ,on the premise that the target convexity is guaranteed, strip steel convexity change of the racks are optimized through self-adaptation convexity correction computation according to rolling parameters provided by a rolling model and with the combination of roller system characteristics of the racks, and therefore under the condition that wide strip steel, narrow strip steel, thin strip steel and thick strip steel are rolled in a mixed mode, strip steel straightness and target convexity control are stable, and the hit rate of strip steel target convexity control is improved.

Description

technical field [0001] The invention belongs to the technical field of strip hot rolling process analysis and control, and in particular relates to an adaptive crown change hot rolling shape control model. Background technique [0002] With the continuous development of my country's iron and steel industry in recent years, as well as the continuous increase in the demand for automobiles, machinery, electric power and other industries, the product structure has changed from mainly wire and rod to plate and strip with higher production technology requirements. The shape control technology is the core technology of strip production and control, and it is also one of the most important indicators to measure the production capacity of strip. An accurate, effective and adaptable flatness control control model is a necessary condition and an important guarantee for good flatness control. [0003] At present, people have done a lot of theoretical research on the shape control and m...

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Problems solved by technology

For example, "Model and Control of Hot Strip Rolling" (edited by Sun Yikang, 2002, Metallurgical Industry Press), etc., but in actual application, we found that the traditional flatness control method is not effective when the product specification and steel span are relatively large. , under the premise of ensuring the flatness, there are defects in the distribution of the crown adjustment of each stand, and the shifting and bending rolls of some stands are close to the limit value, while some stands have a large adjustment margin, the rolling process The variation of proportional crown is not reasonable enough, resulting in unstable rolling process and even flatness problems

What's more, there is a last resort to change the target convexity of the final production, which seriously affects the control of the target convexity

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