Título

ANALYSIS FRONT-END CURVATURE IN THE HOT FINIISH ROLLING PROCESS

ANALYSIS FRONT-END CURVATURE IN THE HOT FINIISH ROLLING PROCESS

Autoria

Reis, Leonardo Camilo dos; Paulo, Claudio Silva de; Dadomi, Edmilson Fernandes

DOI

10.5151/2594-5297-32218

Downloads

Baixar Artigo 304 Downloads

Resumo

In the production of hot strips, one of the factors that may affect productivity is the possible occurrence of failure from the geometry of the strip at the exit of the rolling rolls, since the tip of the strip can turn-down or turn- up. This study had the objective of evaluating the behavior of the strip when leaving the working cylinders, through numerical simulation, aiming to know the influences of the main variables that govern the formation of the "turn-down". The methodology consisted in performing the computational simulation of the strip lamination and to vary the operational and geometric parameters that can influence in the process. The analysis of the results allowed concluding that the lamination of strips of HSLA material with final thickness varying between of 3 to 6 mm and a reduction of 6.6% to 11.0% in the last strip mill, tends to bend towards the cylinder with larger diameter, higher coefficient of friction, higher temperature and lower limit of material flow. It was observed that the variation in diameter is the factor that contributes most to the formation of the curvature of the strip tip. Based on these results, several measures were implemented in the industrial line, with a significant reduction in the occurrence of "turn-down".

 

In the production of hot strips, one of the factors that may affect productivity is the possible occurrence of failure from the geometry of the strip at the exit of the rolling rolls, since the tip of the strip can turn-down or turn- up. This study had the objective of evaluating the behavior of the strip when leaving the working cylinders, through numerical simulation, aiming to know the influences of the main variables that govern the formation of the "turn-down". The methodology consisted in performing the computational simulation of the strip lamination and to vary the operational and geometric parameters that can influence in the process. The analysis of the results allowed concluding that the lamination of strips of HSLA material with final thickness varying between of 3 to 6 mm and a reduction of 6.6% to 11.0% in the last strip mill, tends to bend towards the cylinder with larger diameter, higher coefficient of friction, higher temperature and lower limit of material flow. It was observed that the variation in diameter is the factor that contributes most to the formation of the curvature of the strip tip. Based on these results, several measures were implemented in the industrial line, with a significant reduction in the occurrence of "turn-down".

Palavras-chave

Strip mill; Computer simulation; turn-down.

Strip mill; Computer simulation; turn-down.