vertical vibration mill

This article establishes a mechanical-electrical-hydraulic vertical torsional coupling vibration mathematical model, and investigates its vibration suppression control strategy with time varying full state constraints for the rolling mill vertical torsional coupling vibration system.

A vertical nonlinear parametrically excited vibration model of 4-h rolling system was established,in consideration of the nonlinear damping and nonlinear stiffness between working rolls.The analytic approximate solution of parametric resonances to corresponding main frequency,ultra harmonics and inferior harmonics were studied by using multiple …

Abstract. In this paper, a two degree of freedom nonlinear vertical vibration equation of the cold rolling mill with the dynamic rolling force was established, then the delay feedback …

Request PDF | Vibration Analysis of a Vertical Roller Mill: Modeling and Validation | In this paper, vibration characteristics of a Vertical Roller Mill (VRM) are …

A vertical vibration model of a 3-DOF strip rolling mill with a compound roll bearing failure on the outer raceway and inner raceway is established.

The vertical vibration of the cold rolling mill has attracted the attention of several scholars. Tamiya [19] and Tlusty [20] found that post-tension variation can induce phase delay, which in turn leads to the vertical vibration instability of the cold rolling mill.

Friction-induced vibration is a typical self-excited phenomenon in the rolling process. Since its important industrial relevance, a rolling mill vertical-torsional-horizontal coupled vibration model with the consideration of the nonlinear friction has been established by coupling the dynamic rolling process model and the rolling mill structural …

The vertical mill is a very compact machine designed to take up less space and offer the user a high level of production capacity with reduced energy consumption. ... High safety standards: bearing temperature is monitored by PT 100 sensors and a vibration detection system may be installed (optional).

Abstract The dynamic effect of work-roll oxide-film periodic spalling on vertical vibration in a hot strip rolling mill was studied. Based on dynamic monitoring test analysis, the friction of the work-roll surface under oxide-film periodic spalling is discussed. Using an average rolling pressure formula, the rolling force under the dynamic vertical …

The vertical vibration of the rolling mill caused by the large reduction ratio and high rolling speed reduces the qualification rate of strip products, and even damages the rolling equipment. In ...

Abstract: This paper studies the twist vibration of the branch closed system in the main transmission system of the vertical rolling mill, by means of the method of the theory and measurement, reason of negative moment of two roller in rolling steel is found. The research result shows that the theoretical calculation is consistent with the spot …

The vertical vibration of a cold rolling mill as a dynamic process can mainly be expressed by the amount of change of displacement of the work rolls and strip during the rolling process. If the change is too large, it means that the vertical vibration has affected the rolling thickness at exit and surface quality. Therefore, discussing the ...

The influence of nonlinear factors on the vibration of the rolling mill is studied by Niziol et al., they established the vertical vibration dynamic model with two degrees of freedom [10,11]. Bayón et al. considered that the nonlinear friction coefficient and nonlinear equivalent stiffness of hydraulic cylinder were caused by the change of ...

Furthermore, a new type of particle damping absorber was designed to suppress the vertical vibration of the mill. This study provided some theoretical guidance for the study of mill vibration damping [11]. However, a cold rolling mill is a nonlinear system with many random fluctuations. In the actual environment, random excitations …

Kimura et al. installed a dynamic vibration absorber (DVA) on the cold rolling mill to offset the vibration energy by detecting the vibration signal of the roller …

Vertical nonlinear vibration characteristics of the cold rolling mill are studied. •. Using the Magnus series to solve the vibration response and dynamical …

DOI: 10.1016/J.JMATPROTEC.2005.02.121 Corpus ID: 121107993; Numerical analysis of the vertical vibrations of rolling mills and their negative effect on the sheet quality @article{Nizio2005NumericalAO, title={Numerical analysis of the vertical vibrations of rolling mills and their negative effect on the sheet quality}, author={J{'o}zef …

Rolling mill vibration is a technical problem in the iron and steel industry for many years and has serious impact and harm on production. There were serious vibrations in the middle mills when rolling thin container strip for the compact strip production (CSP) strip hot rolling process. This paper studied the hysteretic characteristic of rolled strip and …

The influence of nonlinear factors on the vibration of the rolling mill is studied by Niziol et al., they established the vertical vibration dynamic model with two degrees of freedom [10, 11]. Bayón et al. considered that the nonlinear friction coefficient and nonlinear equivalent stiffness of hydraulic cylinder were caused by the change of ...

In this paper, we find the violent vibration of the hot rolling mill is induced by the combination of the screw-down system and the strip, explain how the srew-down-strip combined excitation...

1. Introduction. The vertical vibration phenomenon associated with the cold rolling process has always attracted the attention of researchers at home and abroad, and it is also a major technical problem that plagues the production of iron and steel enterprises [1], [2], [3], [4].Four-roller cold rolling mills are widely used in aerospace [5], iron and …

1.. IntroductionThe vibrations of the subassemblies of the rolling stands and the strip in the frequency range (120–180 Hz) are among the phenomena causing the most critical profile defects of the metal sheet which is the final product of the rolling process.These defects are caused by the backward self- and parametrically excited …

In this paper, a two degree of freedom nonlinear vertical vibration equation of the cold rolling mill with the dynamic rolling force was established, then the delay feedback control method was ...

A rolling mill driving system is a multiple degree of a freedom torsional vibration system [].The torsional vibration of a driving system causes the rolling speed to change dynamically, providing instability factors at rolling interface and impacting the strip quality [2, 3].Therefore, it is necessary to explore the torsional vibration caused by the …

Abstract. A variable mass tuned particle absorber is designed for the nonlinear vertical vibration control of the corrugated rolling mill in the composite plate rolling process. Considering the ...

Liu et al. researched the vertical, nonlinear parametric vibration characteristics of the mill roll system, and discussed the influence of parameters such as damping, stiffness and external excitation on …

The vertical vibration of the rolling mill caused by the large reduction ratio and high rolling speed reduces the qualification rate of strip products, and even damages the rolling equipment. In ...

Vertical vibration model of strip mill is established by considering piecewise nonlinear constraint arising from hydraulic cylinder. The approximate analytical solution of the model is obtained by ...

They simulated the system to investigate how the stiffness and damping characteristics of the rolling interface affect the vertical vibration of the rolling mill. Liu et al. [15, 16] developed a 2-degree-of-freedom vertical dynamic model of the rolling mill that considered the constraining effect of the nonlinear stiffness of the hydraulic ...