Análise via Simulação Matemática Do Perfil Inicial Dos Cilindros De Trabalho Como Ferramenta Para Melhoria Do Controle De Forma Da Tira

Abstract

A study to determine the optimal initial work roll profile for hot rolling based on profile and flatness mathematical simulation analysis is presented in this paper. The goal of this analysis is to suggest the work roll crown necessary to achieve the desired thickness profile and flatness of the hot-rolled strip. Therefore, it was used a shape model to simulate and optimize the rolling process, considering a work roll campaign of 150 strips in a hot strip mill. In addition to the shape model analysis, the simulation results were verified with the flatness dead band evaluation. Finally, the new work roll profile values were successfully applied in a hot strip mill. The results showed that the method used was able to accurately predict the ideal roll crown value and to solve quality issues in hot rolling and subsequent processes, such as ridge buckle defects and edge waves in hot dip galvanized and electro-galvanized products. The simulation results closely matched the industrial performance, making it possible to carry out a major modification on the initial work roll profile values without any operational instabilities, avoiding costs associated with unsuitable industrial trials. Overall, the proposed method is a reliable and efficient tool for determining the optimal roll crown value and improving the process performance.