Causes of chatter in a hot strip mill: Observations, qualitative analyses and mathematical modelling

Panjković, Vladimir; Gloss, Ronald; Steward, John; Dilks, Stephen John; Steward, Robert L.; Fraser, Gregory

doi:10.1016/j.jmatprotec.2011.12.004

Cited by 38 publications

(15 citation statements)

References 18 publications

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“…K j is the total contact stiffness between the inner and outer raceways of the work roll bearing and rolling element j. 4 8/9 9/10 8.06 10 2…”

Section: Contact Force Model Of the Work Roll Bearing With A Single Pmentioning

confidence: 99%

“…Shi studied the influence casued by the angle of the jointed shaft in the drivelines of the rolling mill and the friction force of the roll gap on the nonlinear vibration of the rolling mill, and found that the optimal angle of the jointed shaft is 4.7613° [ 3] . Study by Vladimir et al have shown that the main cause of chatter in the rolling mill is the frictional conditions in the roll gap, and then is the residual chatter marks on the roll, which sometimes can also cause chatter [4] .…”

Section: Introductionmentioning

confidence: 99%

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Study on Vertical Vibration Characteristics of the 2-DOF Strip Rolling Mill Model with a Single Weak Defect on the Work Roll Bearing Outer Raceway

Sun¹,

Hou²,

Liang³

et al. 2019

Mech. Eng. Sci.

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Considering the influence caused by a early single pit defect on the outer raceway of the work roll bearing, a 2-DOF plate strip rolling mill vertical vibration model with a single point weak fault on the outer raceway was established. With the practical parameters of the roughing mill of the 1780 hot continuous rolling mill, the vertical vibration characteristics of the rolling mill work roll with different rotating speed and different single pit defect area on the bearing outer raceway are analyzed by numerical simulation. It is found that with the change of the rotation speed of the work roll, different nonlinear vibration behaviors occurred, such as superharmonic resonance, main resonance, combined resonance and sub-harmonic resonance. Especially the subharmonic resonance of the work roll is more harmful than the main resonance when the work roll speed is twice the rotation speed corresponding to the first and second natural frequency of the rolling mill. This work provides a theoretical basis for further clarifying the effect caused by a early defect of the work roll bearing on the mill vibration.

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“…K j is the total contact stiffness between the inner and outer raceways of the work roll bearing and rolling element j. 4 8/9 9/10 8.06 10 2…”

Section: Contact Force Model Of the Work Roll Bearing With A Single Pmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Vertical Vibration Characteristics of the 2-DOF Strip Rolling Mill Model with a Single Weak Defect on the Work Roll Bearing Outer Raceway

Sun¹,

Hou²,

Liang³

et al. 2019

Mech. Eng. Sci.

View full text Add to dashboard Cite

show abstract

“…In the rolling mill structure, it mainly includes torsional vibration analysis in horizontal plane studied by Vladimir et al, 5) vertical vibration analysis in the vertical plane studied by Kimura et al,6) vertical-torsional coupling vibration analysis studied by Niroomand et al, 7) and verticaltorsional-horizontal coupling vibration analysis studied by Zeng et al 8) In addition, with the development of nonlinear dynamics theory, the nonlinear dynamic models of the rolling mill were studied. [9][10][11][12] The structural dynamic model became more and more comprehensively from the singledimensional linear vibration model to multi-dimensional nonlinear coupled vibration model.…”

Section: Experimental and Numerical Investigation On The Roll System mentioning

confidence: 99%

“…However, the research on the dynamic rolling torque or friction force of the rolling interface is less and imperfect. Zhong et al 4) and Vladimir et al 5) established the dynamic rolling torque model or friction force model considering the Stribeck effect only, and it ignored the dynamic transformation between the back slip and forward slip zone caused by the work roll vibration, which also has a significant effect on the rolling torque. So, the established dynamic rolling torque models are imperfect.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation on the Roll System Swing Vibration Characteristics of a Hot Rolling Mill

et al. 2017

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“…When the loading torque is suddenly changed in the unsteady‐state transition process of biting, throwing, ceasing, and speed shift, various kinds of torsional vibration problems, which damage the mill equipment and affect the normal production, become increasingly evident . The accidents of fracture fault, connecting shaft damage and rotor component failure have ascending trend in recent years . The vibration of rolling mill not only affects the smooth and steady characters of running mill, but also influences the quality of the rolled strip, especially the superficial quality.…”

Section: Introductionmentioning

confidence: 99%

Strongly Nonlinear Dynamics of Torsional Vibration for Rolling Mill's Electromechanical Coupling System

Liu

Sun

Zhao

et al. 2015

steel research int.

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The torsional vibration often occurs during the rolling process, which will affect the production equipment. Based on electromagnetic field theory, the air gap magnetic field energy of salient pole synchronous motor was given, and the expression of electromagnetic torque was derived using the energy analysis method. In order to study the electromechanical coupling characteristics of the main drive system in rolling mill, a torsional vibration model with strongly nonlinear terms was established on the basis of mechanical dynamic principle. The periodic solutions of the strongly nonlinear torsional vibration system were obtained using the incremental harmonic balance (IHB) method. When the excitation force amplitude and the electromagnetic stiffness changed, the influence law on the torsional vibration characteristics of electromechanical coupling system under strongly nonlinear conditions was found. The effects of different electrical and mechanical parameters on the system amplitude-frequency property and vibration displacement characteristics were analyzed. All these research results are significant to structure design, parameter optimization and vibration control for the mill drive system.[ Ã ] Prof.

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Causes of chatter in a hot strip mill: Observations, qualitative analyses and mathematical modelling

Cited by 38 publications

References 18 publications

Study on Vertical Vibration Characteristics of the 2-DOF Strip Rolling Mill Model with a Single Weak Defect on the Work Roll Bearing Outer Raceway

Study on Vertical Vibration Characteristics of the 2-DOF Strip Rolling Mill Model with a Single Weak Defect on the Work Roll Bearing Outer Raceway

Experimental and Numerical Investigation on the Roll System Swing Vibration Characteristics of a Hot Rolling Mill

Strongly Nonlinear Dynamics of Torsional Vibration for Rolling Mill's Electromechanical Coupling System

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