Vibration reduction characteristics of a rolling mill roll system with particle damping vibration absorber

Vertical vibration often occurs in a rolling mill during high-speed rolling process. The vibration behavior will affect the stability of the rolling process and the surface quality and bonding strength of the composite plate, which is not conducive to efficient and continuous rolling production. In order to suppress the vertical vibration of the rolling mill roll system during rolling process, a multi-degree-of-freedom particle damping vibration absorber was designed. The model of vertical nonlinear parametric vibration of the upper work roll on the rolling mill with absorber was established. Using the multi-scale method, the amplitude-frequency characteristic equation of the system was solved, and the singular characteristics, time domain characteristics, frequency spectrum characteristics and amplitude-frequency characteristics of the vibration system were simulated and analysed. The vertical vibration control experiment was carried out on the upper work roll of a statically determinate rolling mill. By the comparison analysis, it is found that the theoretical analysis results are basically consistent with the experimental ones, which proves the reliability of the established four-degree-of-freedom vibration model. The results show that the particle damping vibration absorber can effectively suppress the vertical vibration of the rolling mill roll system and meet the design requirements. © 2023 Chinese Vibration Engineering Society. All rights reserved.