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Título

DYNAMIC ANALYSIS IN A REBAR MILL

Autoria

Sousa, Fernando Cesar; Severino, Henrique da Rocha; Castro, Renato Nascimento de; Moretti, Ramon Augusto; Carletti, Gabriel Oliveira N.; Santos, Edmilson Ricardo de Oliveira; Azenha, Rafael Rodrigues; Gomes, Marcos Antônio Rodrigues

DOI

10.5151/9785-9785-32388

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Resumo

 

Rolling stand xx (LTx) of long steel, installed in the company A, Piracicaba - SP unit, had presented high levels of vibration, which affected its internal components, such as: shaft, gears and bearings, generating downtime. To evaluate this equipment a study was proposed by the following engineering techniques: Conventional Vibration Analysis, Operational Deflection Shape (ODS) and numerical simulation by the Finite Element Method (FEM). In the Conventional Vibration Analysis, high levels of vibration were observed during manufacturing process, especially when the material reaches the equipment. Impacts generate high values in acceleration, on average 80 m/s² peak to peak. At the moment of impact, misalignment of internal components was observed by ODS. Field results were correlated to those obtained by the Finite Element Method, which allowed to calibrate FEM model. Thus, the most effective structural modification already evaluated numerically was implemented in the system. Afterwards, new measurements by vibration and ODS technique were performed, and the attenuation of the vibrational levels and the operational mode, which overloaded the internal components rolling stand, was verified.

Palavras-chave

Rolling stand, Impacts, Vibration, Operational mode, Simulation