Transactions of Materials and Heat Treatment

Title：Dynamic characteristics of blade rolling mill transmission system driven by hydraulic cylinder

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ClassificationCode：TG339

year,vol(issue):pagenumber：2023,48(9):156-167

Abstract：

In order to analyze the influence of nonlinear dynamic characteristics for hydraulic cylinders on the vibration of transmission system for blade rolling mill, the coupled vibration model of hydraulic cylinder and transmission system for blade rolling mill was established. Considering the elastic deformation of rack matrix under load effect, the time-varying meshing stiffness of secondary gear-rack for upper roll was derived. The Runge-Kutta method was used to obtain the dynamic characteristics of system. The effect of parameters such as initial effective length of rodless cavity and meshing stiffness of gear-rack on the dynamic characteristics of transmission system for rolling mill were studied. The results show that the increasing of the initial effective length of rodless cavity causes the system to gradually move from periodic motion to multiplier motion, and eventually to chaotic motion. Besides, the meshing stiffness of gear-rack causes the fluctuation for vibration displacement of primary gear and secondary gear-rack of upper roll at the initial moment, and has less effect on the movement state of primary gear of lower roll.

Funds：

河南省高等学校重点科研项目（22A460007）；2022年河南省重点研发与推广专项（222102220020）；2022安阳市科技特派员

张瑜（1987-），男，博士，讲师 E-mail：z13464238735@sina.com

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图24有无考虑齿条基体变形的上轧辊二级齿条振动信号图

（a）振动加速度（b）频谱图

Fig.24Vibration signal diagrams of secondary rack for upper roll with and without considering rack matrix deformation

(a)Vibration acceleration(b)Spectral diagram

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