System kinetics characteristics of multi-parameter coupling …
— 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 …
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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 ...
Coupling vibration characteristics and vibration suppression …
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 …
Coupling vibration characteristics and vibration suppression …
— 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 …
Review on Main Drive Torsional Vibration and Roller Coupling …
— 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 ...
Impact of electromechanical coupling of main drive system …
— 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 ...
Nonlinear Dynamics of Torsional Vibration for Rolling Mill's Main Drive
— The jointed shaft in the drivelines of the rolling mill, with its angle continuously varying in the production, has obvious impact on the stability of the main drive system. Considering the effect caused by the joint angle and friction force of roller gap, the nonlinear vibration model of the main drive system which contains parametric excitation stiffness …
Vertical–horizontal coupling nonlinear vibration …
— 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 …
Abnormalities and Failures of Rolling Mill Rolls
— 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 ...
Adaptive Torsional Vibration Control of the Nonlinear Rolling Mill …
— This paper studies the torsional vibration suppression control problem for the nonlinear rolling mill main drive system with performance constraint requirements and unknown measurement sensitivities. Firstly, considering the nonlinear friction between the roll gaps, a torsional vibration model of the main drive system of rolling mill is …
Research on Multi-System Coupling Vibration of a Hot Tandem Mill …
— 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 …
Decoupling Control of Bridle Rolls for Steel Mill Drive System
— 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 …
Failure analysis of rolling mill stand coupling
— Slipper couplings and drive shafts are used to transmit torque between gearbox and 3-high-roughing mill stands. The failure of both couplings occurred on the middle roll between the first stand and the gearbox, roll side, Fig. 2. ... investigated a failure analysis of rolling mill stand coupling, the analysis results indicated that improper ...
Failure analysis of rolling mill stand coupling
— Semantic Scholar extracted view of "Failure analysis of rolling mill stand coupling" by Ž. Domazet et al.
Dynamics of rolling mill drive system considering arc …
the more complex the vibration mode was, and the lower the stability of the drive system was. Kords Rolling mill Drive system Arc tooth gear Coupling model Dynamic characteristics 1 Introduction The drive system of a hot rolling mill is the power source to roll strip, which is mainly composed of a gearbox, a
Torsional Vibration for Rolling Mill with the Drive System …
— 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 …
Hopf Bifurcation Control for Rolling Mill Multiple-Mode-Coupling …
— DOI: 10.1115/1.4037138 Corpus ID: 126226611; Hopf Bifurcation Control for Rolling Mill Multiple-Mode-Coupling Vibration Under Nonlinear Friction @article{Zeng2017HopfBC, title={Hopf Bifurcation Control for Rolling Mill Multiple-Mode-Coupling Vibration Under Nonlinear Friction}, author={Lingqiang Zeng and Yong Zang …
An active method suppressing rolling mill vibration: …
— 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 …
QUALITIVE ANALYSIS OF SELF-EXCITED HORIZON VIBRATION IN SINGLE-ROLL
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 …
Tandem strip mill's multi-parameter coupling dynamic modeling based …
— 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 …
Vertical–horizontal coupling nonlinear vibration …
— Download Citation | Vertical–horizontal coupling nonlinear vibration characteristics of rolling mill under mixed lubrication | Considering the dynamic influence of the roll vibration on the ...
Dynamics and stability analysis of rolling mill system
— The diagram shown in Fig. 1 defines several parameters in accordance with the metal rolling principle. h 0 represents half of the strip entry thickness, while h 1 denotes half of the strip exit thickness, h c is half of the loaded roll gap. h' c is the speed of roll system motion. The radius of the work roll is given by R, and the centers of the work roll …
Study on the Vertical-Torsion Coupling Vibration of Six-high Rolling Mill
— 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 ...
Multi-Modal Stress Characteristics Under Coupling Effect of …
— Almost all frequencies can be obtained by the combination of strip fluctuation and roll vibration frequency, which reveals that the multi-modal characteristics …
Coupling dynamic model of chatter for cold rolling | Journal …
— 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 …
Impact of electromechanical coupling of main drive system …
— 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 ...
Statically determinate characteristics of microdisplacement …
— 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 ...
Failure Analysis of Rollers in mill stand using Failure mode Effect
This is either a mill or roll fault. Journal Failure from Drive End Torque: The torque on the drive end has exceeded the torsional strength of the journal material. The strength of the journal will also be affected by the notch effect of sharp radii, i.e. in the split ring recess, or any other stress raisers such as radial bore-holes.
Coupled Vertical–Horizontal Vibration
— @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}, …
Coupled Vertical–Horizontal Vibration Characteristics of a
— 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 …
International Journal of Robust and Nonlinear Control
— This article establishes a mechanical-electrical-hydraulic vertical torsional coupling vibration mathematical model, and investigates its vibration suppression control …
Failure analysis of rolling mill stand coupling
— Slipper couplings and drive shafts are used to transmit torque between gearbox and 3-high-roughing mill stands. The failure of both couplings occurred on the …
Dynamic behaviour of cold rolling mill with unsteady lubrication roll
— 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 …
Advanced Design of Work Roll Contours for Different Roll Mill …
— 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.
Roll System and Stock's Multi-parameter Coupling Dynamic …
DOI: 10.1007/S10033-017-0104-6 Corpus ID: 114883448; Roll System and Stock's Multi-parameter Coupling Dynamic Modeling Based on the Shape Control of Steel Strip @article{Zhang2017RollSA, title={Roll System and Stock's Multi-parameter Coupling Dynamic Modeling Based on the Shape Control of Steel Strip}, author={Yang Zhang and …
Nonlinear Dynamics of Torsional Vibration for Rolling Mill's Main Drive
— 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].