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 test, the dynamical behaviors of the rolling mill under the motion of roll system and the strip show multi-modal vibration phenomenon, which are consistent with the variation of rolling …
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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].
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The roll deformation model of the six-high rolling mill is one of the core models of the strip shape control theory. The influence function method (IFM) is a numerical method applied to solve the roll deformation problem. This study aims to address the problems of slow calculation speed and insufficient calculation accuracy of IFM in …
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The 5500 mm thick plate rolling mill studied in this paper adopts the bottom installation, as shown in Figure 2 and Figure 3, the HGC hydraulic cylinder is installed on the bottom of the frame, and above it is the lower support roll, the lower work roll, the upper work roll, and the upper work roll. The roll gap of a rolling mill generally ...
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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 …
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DOI: 10.1002/rnc.6098 Corpus ID: 247486498; Modeling and vertical torsional coupling vibration control of the rolling mill with full state constraints …
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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 … See more
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2.1 Establishment of Vibration Model. Considering the actual structural asymmetry of the hot rolling mill, as well as the vertical and horizontal directions in the rolling process by the strip entrance thickness and roll thickness fluctuations resulting in changes in rolling forces, the horizontal–vertical coupling vibration model of the mill …
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In order to ensure the accuracy of the model simulation results, the boundary conditions are constrained as much as possible according to the actual situation, and the actual working conditions are reasonably simplified as shown in Fig. 2.The fixed constraint simulation is applied to the screw part to provide the rolling mill stiffness; the arc surface …
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Journal Journal Home ... He, W. Tao, and H. Xu, "A kind of ripple rolling mill roll system vibration detection control device and control method", CN110449469A, 2019. [22] ... Title:Review on Main Drive Torsional Vibration and Roller Coupling Vibration of Rolling Mill.
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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 monitoring system. Firstly, the coupling vibration mechanism model of the dynamic characteristics of roll system and bearings of four-high mill was established. …
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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 …
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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 controller is obtained by using the …
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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.
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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 …
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DOI: 10.1007/s42243-023-01041-0 Corpus ID: 260659701; Analysis of coupling mechanism between roll system crossing and liner wear of hot strip mill @article{Zheng2023AnalysisOC, title={Analysis of coupling mechanism between roll system crossing and liner wear of hot strip mill}, author={Jianhao Zheng and Hua-gui …
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If the vibration divergence behavior of the mill the roll system is controlled, the limit cycle amplitude of the mill the roll system converges to a small range, which enhances the stability of the system to a certain extent. ... Lin Q. Characteristic of torsional vibration of mill main drive excited by electromechanical coupling. Chinese ...
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Available online at %# # # ScienceDirect JOURNAL OF IRON AND STEEL RESEARCH, INTERNATIONAL. 2013, 20(1) â– . 07-12 Nonlinear Dynamics of Torsional Vibration for Rolling Mill's Main Drive System Under Parametric Excitation SHI Pei-ming 1, LI Ji-zhao 1, JIANG Jin-shui 1, LIU Bin 1, HAN …
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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 ...
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Introduction. Four-high mills are mainly used for rolling foils, sheets and plates and account for a large percentage of all mills. The speed of contemporary four-high mills has reached 1800–2200. m/min to meet demands for rolling of foils and sheets.. However, frequent burning of end-thrust bearings in the work-roll assembly can disrupt …
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A dynamic model coupling vertical and horizontal vibrations is also established to analyze the vibration characteristics of a Sendzimir twenty-high cold roll mill based on the rolling force ...
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The drive system of a hot rolling mill is the power source to roll strip, which is mainly composed of a gearbox, a main spindle, a herringbone gear box, spindles and a roll system. The spindle connecting the herringbone gear box and the roll system adopts an arc tooth gear structure, which has a strong transmission capacity in the coupling.
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ZHANG Y F, YAN X Q, LIN Q H. Characteristic of torsional vibration of mill main drive excited by electromechanical coupling[J]. Chinese Journal of Mechanical …
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This paper studies the torsional vibration suppression control problem for the nonlinear rolling mill main drive system with performance constraint requirements and …
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the mill roll stand structure model and the h ydraulic servo sys tem model; meanwhile the effects of different working conditions on the stability of cold rollin g mill system were d iscussed; It
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Failure analysis of rolls with grooves. Ž. Domazet Francisko Lukša M. Šušnjar. Materials Science, Engineering. 2007. 10. PDF. Semantic Scholar extracted view of "Failure analysis of rolling mill stand coupling" by Ž. Domazet et al.
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Bifurcation and chaos for electromechanical coupling torsional vibration in rolling mill system driven by DC motor is studied in this paper. Considering the electromechanical devices under ...
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ZHANG Y F, YAN X Q, LIN Q H. Characteristic of torsional vibration of mill main drive excited by electromechanical coupling[J]. Chinese Journal of Mechanical Engineering, 2016, 29(1): 180-187. PENG Y, ZHANG Y, SUN J L, et al. Tandem strip mill's multi-parameter coupling dynamic modeling based on the thickness control[J].
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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 …
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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 …
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Overloads can be experienced through a variety of conditions such as (i) a mill stall due to a sticker, (ii) rolling abnormalities such as welding of material being rolled, wrong pre-set of the roll gap etc., and (iii) incorrect drive shaft fitting, either by the rolling mill, or by incorrect machining of the drive end. This is generally a mill ...
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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 …
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The International Journal of Robust and Nonlinear Control promotes development of analysis and design techniques for uncertain linear and nonlinear …
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The Journal of Engineering The 9th International Conference on Power Electronics, Machines and Drives (PEMD 2018) Use of automated electric drives for limiting dynamic loads in shaft lines of roll mill stands eISSN 2051-3305 Received on 22nd June 2018 Accepted on 2nd August 2018 E-First on 15th April 2019 doi: 10.1049/joe.2018.8135
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The rolling process is determined by the interaction of a number of different movements, during which the relative movement occurs between the vibrating roll …
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Yang et al. proposed a coupling vibration model by coupling the rolling process model, the mill roll stand structure model and the hydraulic servo system model; meanwhile the effects of different working conditions on the stability of cold rolling mill system were discussed; It contributes to the further study and suppression of coupling ...
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