— 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 …
WhatsApp: +86 18221755073
— DOI: 10.1007/s12541-021-00559-1 Corpus ID: 238682847; Multi-Modal Stress Characteristics Under Coupling Effect of Strip and Work Roll @article{Cui2021MultiModalSC, title={Multi-Modal Stress Characteristics Under Coupling Effect of Strip and Work Roll}, author={Jinxin Cui and Yan Peng and Jian-liang Sun and …
WhatsApp: +86 18221755073
— In this paper, we investigate the rolling interface instability characteristics caused by the coupled motion of strip and the roll system. Based on the experimental …
WhatsApp: +86 18221755073
— 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 …
WhatsApp: +86 18221755073
— 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 ...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
— Therefore, a four-degree-of-freedom model of a work roll of rolling mill with DVA is established as shown in Fig. 4. l 6 is the distance from the upper work roller to …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
— Fig. 8 shows the effect of lubricant viscosity on rolling vibration critical speed. It can be seen that the critical speed of the vibration decreases with increasing viscosity. …
WhatsApp: +86 18221755073
— @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}, …
WhatsApp: +86 18221755073
— 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 …
WhatsApp: +86 18221755073
In the study of electromechanical coupling vibration of mill main drive system, the influence of electrical system on the mechanical transmission is considered generally, however the research for the mechanism of electromechanical interaction is lacked. In order to research the electromechanical coupling resonance of main drive system on the F3 mill in a plant, …
WhatsApp: +86 18221755073
— The failure analysis of two slipper couplings showed that both couplings fractured as a result of fatigue due to deficient design. In both cases, fracture started in …
WhatsApp: +86 18221755073
— 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.
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
— 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 …
WhatsApp: +86 18221755073
— 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 …
WhatsApp: +86 18221755073
— 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 …
WhatsApp: +86 18221755073
— The International Journal of Robust and Nonlinear Control promotes development of analysis and design techniques for uncertain linear and nonlinear …
WhatsApp: +86 18221755073
— 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 ...
WhatsApp: +86 18221755073
— Download Citation | Vertical–horizontal coupling nonlinear vibration characteristics of rolling mill under mixed lubrication | Considering the dynamic influence of the roll vibration on the ...
WhatsApp: +86 18221755073
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
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
— In the study of electromechanical coupling vibration of mill main drive system, the influence of electrical system on the mechanical transmission is considered …
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
— 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 …
WhatsApp: +86 18221755073
— 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 ...
WhatsApp: +86 18221755073
— 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 ...
WhatsApp: +86 18221755073
— 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 ...
WhatsApp: +86 18221755073
— 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 …
WhatsApp: +86 18221755073