— This study investigates a novel disturbance observer-based distributed sliding mode control (DOB-DSMC) strategy for the multimotor web-winding system in the presence of model uncertainties and external disturbances, which can not only reduce the effect of coupling between continuous subsystems on states but also restrain the influence of …
— DOI: 10.1016/S1006-706X(10)60193-8 Corpus ID: 108441876; Coupling dynamic model of chatter for cold rolling @article{Yang2010CouplingDM, title={Coupling dynamic model of chatter for cold rolling}, author={Xu Yang and Chao-nan Tong and Guang-feng Yue and Jian Meng}, journal={Journal of Iron and Steel Research …
— The nonlinear dynamic model of electromechanical coupling main drive system of rolling mill with nonlinear stiffness and frictional torque is established. The equilibrium point of the system is analyzed, the conditions of the Hopf bifurcation of the system are given, and the type of the bifurcation is studied. The Hopf bifurcation …
— A work roll contour has been grounded on the 6–7 stand of a 4-high hot tandem rolling process, shown in Fig. 8. The effect of work roll contour of hot rolling on the cold rolled product is shown in Table 5. It can be seen that the implementation of work roll contour on hot rolling mill makes a larger impact on the reversing mill.
— Increasing the external excitation overall enhances the intensity of vertical vibration, allowing the rolling mill roll system to quickly initiate vibration within a small …
— The rolling mill vibration not only seriously causes the strip thickness heterogeneity, but also damages the rolling mill equipment and its electrical components. Existing vibration suppression methods are passive and mainly tune mechanical, hydraulic, electrical and rolling process parameters. A new active vibration suppression method …
— By site assessment, the roll system vibration is reduced obviously, and it is inhibited rolling mill mechanical- electronic-liquid coupling vibration phenomenon, so it has obtained the remarkable ...
— 2.1 Dynamic Model. The rolling mill drive system mainly consists of the motor, reducer, main shaft, speed divider, arc gear shaft, work roll and bearings at corresponding parts [].The torsional vibration is often closely related to the dynamic energy transformation process of the rolling interface, which causes the relative speed between …
— In order to suppress the vibration during the rolling process of the rolling mill and improve the stability of the rolling process, this paper designs a spring-damping …
— In case of journal failure from drive end torque, the fracture face is inclined to the roll axis and can show a complete shear fracture, which quite often forms a cone shaped break. This type of fracture occurs at the drive end initiating from the weakest section, which is often the split ring recess, propagating to the centre of the neck, or ...
— 3.1 Dynamic Model of Rolling Mill Structure. According to the structure of the vertical system of the rolling mill, the 8-DOF dynamic model of the vertical system was established, as shown in Fig. 8, where m 1 to m 8 are the equivalent masses of upper part of housing, upper backup roll, upper intermediate roll, upper work roll, lower work roll, …
— Considering the dynamic influence of the roll vibration on the lubricant film thickness in the rolling deformation area, nonlinear dynamic rolling forces related to film thickness in the vertical and horizontal directions were obtained based on the Karman's balance theory. Based on these dynamic rolling forces and the mechanical vibration of …
— The rolling process is determined by the interaction of a number of different movements, during which the relative movement occurs between the vibrating roll system and the rolled piece, and the roll system's vibration interacts with the strip's deformation and rigid movement. So many parameters being involved leads to a complex mechanism of …
— Impact of electromechanical coupling of main drive system of cold rolling mill on amplitude-frequency characteristics. ... Main drive mechanical system of a cold rolling mill was simplified to a three-inertia model, and natural frequency of mechanical system was obtained by using Matlab simulation. ... journal citation and DOI. Show References ...
— Such electromechanical interaction process is suggested to consider in research of mill vibration, which can induce strong coupling vibration behavior in the …
— Semantic Scholar extracted view of "Failure analysis of rolling mill stand coupling" by Ž. Domazet et al.
— In order to build high accuracy integral dynamic models of cold rolling mill system, by analyzing the vibration process of cold rolling, the dynamic model of 4-h mill, including the rolling process model, the mill roll stand structure model and the hydraulic servo system model is built. These three models are coupled and linearized, then the …
— Based on the theories of rolling, hydromechanics and vibration, a multi-parameter coupling kinetic model was established, in which the interface friction, geometric constraint and stress distribution were modelled for dynamic roll gap. A quantitative analysis was performed on the key parameters affecting the amplitude and critical speed of …
— In this work, vibration data of the second finishing mill (F2) stand of a hot tandem rolling mill are collected and analyzed, and a mathematical model based on the coupling of a non-uniform …
— Download Citation | Vertical–horizontal coupling nonlinear vibration characteristics of rolling mill under mixed lubrication | Considering the dynamic influence of the roll vibration on the ...
— For a specific four-high mill with a roll system that is a micro-scale statically indeterminate structure, a gyroscopic effect and a propelling mechanism due to friction force are proposed to ... Results show that the additional moment of the work roll drive end has little effect on the screw-down load deviation. And the fluctuation period of ...
— Zhang, R.C., Gao, Z. and Ma, Y.Z., "Electromechanical coupling vibration characteristics of the main drive system for rolling mill considering impacts of electrical parameters, " Mechanical ...
— The new torsional vibration suppression algorithm is developed for the rolling mill main drive system with the untrue measurement information that is obtained by sensors with the unknown measurement sensitivities. The rest of the paper is organized as follows. In Section 2, we give the mathematical modeling of the rolling mill main drive system.
— S. Pei-ming, L. Ji-zhao, J. Jin-shui, L. Bin and H. Dongying, Nonlinear dynamics of torsional vibration for rolling mill's main drive system under parametric excitation, Journal of Iron and Steel Research, 20 (1) (2013) 7–12. Article Google Scholar . R. Zhang and C. Tong, Torsional vibration control of the main drive system of a rolling …
— Download Citation | Review on Main Drive Torsional Vibration and Roller Coupling Vibration of Rolling Mill | Background Rolling mill vibration has become one of the most widespread and unsolved ...
— Vibration in hot tandem rolling mills has been a problem in the iron and steel industry mainly due to its unpredictability. In this work, vibration data of the second finishing mill (F2) stand of a hot tandem rolling mill are collected and analyzed, and a mathematical model based on the coupling of a non-uniform deformation process, mill structure and …
— This paper presents the results of developing a vibration model for the rolling mill vertical system with respect to the roll gap under the unsteady lubrication conditions to address the frequently self-excited vibration phenomenon of rolling mill vertical systems. On the basis of rolling theory, hydromechanics theory, lubrication and friction theory, as well …
Main drive mechanical system of F5 cold rolling mill in steel plant consists of main motor, gear box, cross universal joint shaft, and roll as shown in Figure 1. Main motor driven gear box by the ...
— It mainly brings about the vibration of rolling mill [13–15]. The reports are mainly to determine the vibration mode of the main drive system and analyze the impact of the main drive system on the roll system vibration, and parts of studies focus on multi-system coupling characteristics [16–18].
In the drive system, the torsional stiffnesses of the motor, the gearbox and the herringbone gearbox are far greater than that of the spindle; thus, the stability of the spindle is much lower than those of the others. The vibration of the drive system is mainly on the spindles. Thus, the torsion …
DOI: 10.3901/JME.2001.08.055 Corpus ID: 108953041; QUALITIVE ANALYSIS OF SELF-EXCITED HORIZON VIBRATION IN SINGLE-ROLL DRIVING MILL SYSTEM @article{Tang2001QUALITIVEAO, title={QUALITIVE ANALYSIS OF SELF-EXCITED HORIZON VIBRATION IN SINGLE-ROLL DRIVING MILL SYSTEM}, author={Hua Tao …
— Bifurcation and chaos of electromechanical coupling main drive system with strongly nonlinear characteristic in mill. 2017, Chaos, Solitons and Fractals ... Vertical Vibration Characteristics of Strip Rolling Mill under Compound Roll Bearing Failure. 2022, ISIJ International ... Journal of Vocational Behavior, Volume 119, 2020, Article 103436 ...
— The International Journal of Robust and Nonlinear Control promotes development of analysis and design techniques for uncertain linear and nonlinear systems. ... and investigates its vibration suppression control strategy with time varying full state constraints for the rolling mill vertical torsional coupling vibration system. Firstly, the ...
DOI: 10.1016/j.jmapro.2024.04.066 Corpus ID: 269817642; Coupling vibration characteristics and vibration suppression of rolling mill rolls with dynamic vibration absorber @article{Xu2024CouplingVC, title={Coupling vibration characteristics and vibration suppression of rolling mill rolls with dynamic vibration absorber}, author={Huidong Xu …
Metals 2021, 11, 170 4 of 24 Figure 2. Structure diagram of a four-high hot rolling mill. 2.1. Piecewise Nonlinear Spring Force Model The hydraulic elastic stiffness refers to the nonlinear ...
— @article{Wang2024CoupledVV, title={Coupled Vertical–Horizontal Vibration Characteristics of a Cold Rolling Mill Based on an Optimized Karman Differential Equation}, author={Qiao Yi Wang and Zhen Zhang and Lu Kuan Zhang and Ping Tao}, journal={Iranian Journal of Science and Technology, Transactions of Mechanical Engineering}, …
— In the process of strip rolling, mill vibration induces vertical and horizontal displacements in the rolls and rolled parts, affecting the accuracy of the rolling analysis model. Constant changes occurred in the rolling zone between the upper and lower working rolls due to mill vibration, resulting in slight vertical and horizontal displacements of the …
— Abstract. Main drive mechanical system of a cold rolling mill was simplified to a three-inertia model, and natural frequency of mechanical system was obtained by …
