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 control method was introduced into the equation to controlled the vertical vibration of the system. The amplitude-frequency equations of primary resonance of ...

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.

Rolling mill vibration is a worldwide problem, although it has been found that the mill structure defects are the main cause of vibration, but the inhibition measures are difficult to implement. So we discussed the rolling force parameters influence on rolling mill vibration and suppression measures from rolling technology in this article. The results …

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 …

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 …

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 the process of high speed rolling, vertical vibration will cause the lubrication system in an unsteady state and may further cause the mill system oscillation instability.

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 ...

Vertical–horizontal coupling vibration model of hot rolling mill rolls under multi-piece- wise nonlinear constraints. In Figure 10, k 0 and c 0 are the equivalent stiffness and d amping of the ...

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 …

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

Fan et al. [14] developed the single degree of freedom (DOF) model of vertical vibration system of the F3 mill rollers, and some hysteretic features of rolled strip were further investigated ...

An effective dynamic model is the basis for studying rolling mill vibration. Through analyzing characteristics of different types of vibration, a coupling vibration structure model is established, in which vertical vibration, horizontal vibration, and torsional vibration can be well indicated. In addition, based on the Bland-Ford-Hill rolling force …

According to the vertical vibration phenomena existing in cold rolling mills, the unsteady lubrication mechanism in roll gap and its influence to rolling stability was chosen as the case for analysis.

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...

Based on these dynamic rolling forces and the mechanical vibration of the rolling mill, a vertical–horizontal coupling nonlinear vibration dynamic model was established. The amplitude–frequency equation of the main resonance was derived by using the multiple-scale method. At last, the parameters of the 1780 rolling mill were used for ...

Abstract. In this paper, vibration characteristics of a Vertical Roller Mill (VRM) are studied by using physical parameters of an operating VRM. The mathematical model is derived and simulated for ...

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. Firstly, the mechanical‐electrical‐hydraulic vertical torsional coupling …

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 …

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 …

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 …

At the same time, some scholars have studied the dynamic behavior of rolling mill from the perspective of vertical and horizontal vibration. Yang X. [13] presented a vertical vibration model based on lubrication and friction theory. Hou D. [14, 15] established a vertical-horizontal coupling vibration dynamic model of rolling mill.

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 …

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.

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 ...

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.

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).

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. Yun et al. [21] constructed the modal coupled flutter model and explored the ...

The rolling mill with hydraulic system is widely used in the production of strip steel. For the problem of vertical vibration of the rolling mill, the effects of different equivalent damping coefficient, leakage …

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