Semantic Scholar extracted view of "Vibration analysis and numerical simulation of rolling interface during cold rolling with unsteady lubrication" by L. Cao et al.

Unlike integer order systems, the critical resonance amplitude of high-frequency signals in fractional order systems depends on the damping strength and is influenced by the fractional order damping. This study provides a broader picture of the vibration characteristics of the roll system for rolling mills.

In addition, based on the structure model which can characterize the coupling vibration of rolling mill, and taking the dynamic variations of rolling force and rolling torque as the feedback ...

A vibration monitoring method of strip rolling mill based on the digital twin model was proposed which could effectively. reduce the structure complexity and test cost of the traditional ...

Abstract. S6-high rolling mill is an advanced mode to work the steel: it allows the use of very small work rolls laterally guided by individually adjustable side support rolls, which are supported by two rows of roller bearings mounted in cassettes. In this paper the vibrations generated in a S6-high cold rolling mill are analyzed with the aim ...

The rolling mill system has the characteristic of measurement delay. In order to deal with the effects of time-delayed feedback from strip thickness measurement on vibration suppression, this paper studies the vibration suppression control strategy for rolling mill systems under time varying delay. Initially, the nonlinear rolling force and …

Semantic Scholar extracted view of "Coupled Vertical–Horizontal Vibration Characteristics of a Cold Rolling Mill Based on an Optimized Karman Differential Equation" by Qiao Yi Wang et al.

In this paper, the static bifurcation and dynamic bifurcation of rolling mill system with torsional-horizontal coupling vibration are studied. Firstly, the dynamic equation of torsional-horizontal coupled …

For solving the problem of the transient time-frequency analysis in the non-stationary transient impact signal of the rolling mill,a novel signal analysis method based on EMD and Hilbert transformation(HT)was proposed by theory.First,the intrinsic mode function(IMF)of the signal is extracted by the empirical mode …

The traditional mill chatter mechanism model cannot meet the monitoring and rapid diagnosis needs of the rolling process in the field. In this paper, a data-driven mill vibration analysis method ...

A novel, time-varying stability criterion is proposed to evaluate mill stability. Further study is provided on the optimal friction coefficient and reduction ratio required to increase the critical rolling speed and vibration stability in a tandem cold rolling 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.

Abstract and Figures. The vertical vibration often occurs during the rolling production, which has an influence on the accuracy of rolling mill. In order to effectively suppress the vertical ...

This paper proposes a vibration m onitoring method （ F igure 1 ） based on a digital twin system. for a 1400mm strip rolling mill in a factory. Compared with the traditional rolling mill ...

Considering the unstable oscillation in the rolling process caused by the lubrication conditions change, a dynamic rolling process model considering the nonlinear friction is built using the Bland-Ford-Hill …

Detecting chatter mark vibration in rolling mills operating under normal working conditions is difficult. A novel characteristic recognition method of chatter mark vibration, where the non-dimensional parameters are calculated with time varying signals and kurtosis under normal rolling mill operating conditions, is presented in this paper.

The following findings were obtained : (1) As the rolling speed increases, rolling mill vibrations become less stable. (2) The allowable range of the friction coefficient and tension condition to ensure the stability becomes narrow under high-speed rolling. (3) The fluctuation of tension and friction coefficient have a lot of influence on the ...

The variable gauge rolling process entails fluc-tuation in external load, in form of rolling force, and variation in stifness of the vertical system of rolling mill. The dynamics of the rolling mill under these conditions directly afect the stability of variable gauge rolling process. Therefore, the primary objec-tive and significant ...

The vibration of rolling mill in rolling process and its harm to rolling equipment have become an international problem in steel rolling industry. The essence of the vibration behavior of a mechanical structure is the transfer of energy in the system.

Semantic Scholar extracted view of "Vibration characteristic analysis of twenty-high rolling mill with local defect on roll surface based on the time-varying contact stiffness" by Shengli Wu et al.

The local defect on the roll surface of twenty-high rolling mill is not only the main factor affecting the quality of steel strip but also generating abnormal vibration in rolling process. Local defects are usually very difficult to identify in the rolling process in real time, which is one of the existing difficult problems.

The mill vibration signals collected during mill operation are often affected by complex working conditions and various disturbances, thus presenting strong non-stationary characteristics. After the vibration signal is processed by noise reduction, although the noise interference and modal aliasing phenomenon are solved, the …

There are few reports on the influence of servo valve dynamic characteristics on rolling mill vibration. In this paper, the characteristics of rolling mill vibration are obtained by using the self-made vibration online monitoring system, and the time-domain and frequency-domain analysis of the test signals are carried out. At the same time, the …

The vibration prediction analysis method for hot strip mill based on eXtreme gradient boosting (XGBoost) and Bayesian optimization (BO) and a comprehensive comparison is made between the prediction model in this paper and other well-known machine learning benchmark models.

In order to investigate the validity of a coupled mill vibration model presented in the dynamic rolling formulation, this paper presents the results of dynamic characteristics examining rolling force variations in response to rolling parameters. Under the given steady state rolling condition, the unstable vibrational modes with corresponding …

Download Citation | On Dec 1, 2023, Hongbin Zhang and others published Vertical nonlinear vibration analysis of cold rolling mill considering structural gap and dynamic rolling force | Find, read ...

S6-high rolling mill is an advanced mode to work the steel: it allows the use of very small work rolls laterally guided by individually adjustable side support rolls, which are supported by two rows of roller bearings mounted in cassettes. In this paper the vibrations generated in a S6-high cold rolling mill are analyzed with the aim to investigate the problem of …

The study indicates that, by reducing excitation amplitude and structure gap, the system vibration can be reduced. The research results can provide a theoretical reference for further exploration of the coupling vibration of hot rolling mills. It is important to study the vibration of rolling mills to improve the stability of rolling production ...

The rolling mill vibration is characterized by the coupling effects among mechanical, electrical, hydraulic and interfacial subsystems. The influence of the mill modulus control gain in automatic gauge control on the vibration in …

The self-excited horizon vibration of single-roll driving mill is analyzed. The nonlinear equation of the horizon motion is derived base on analyzing the relationship between relative velocity and ...