Mechanical Engineering Science

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

SunZhengnan, HouDongxiao, XuLiang, ShiPeiming

Abstract


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, com-bined 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.

Keywords


Work roll bearing; Weak defect; Strip mill; Vertical vibration

Full Text:

PDF

References


. Shengli Wu, Liming, Yinmin Shao, et al. Vibration characteristic analysis of twenty-high rolling mill with local defect on roll surface based on the time-varying contact stiffness. Engineering Failure Analysis 2014; 42: 297–310.

. Xing Lu, Jie Sun, et al. Dynamic analysis of vibration stability in tandem cold rolling mill. Journal of Materials Processing Technology 2019; 272:47–57.

. Pei-ming SHI, Ji-zhao LI, et al. Nonlinear Dynamics of Torsional Vibration for Rolling Mill’s Main Drive System Under Parametric Excitation. Journal of Iron and Steel Rsearch, International 2010; 20: 7–12.

. Vladimir Panjkovic, Ronald Gloss, John Steward, et al. Causes of chatter in a hot strip mill: Observations, qualitative analyses and mathematical modelling. Journal of Materials Processing Technology 2012; 212(4): 954–961.

. Son, B., Roh, Y., and Lee, Y., “The Cause of Vibration at Finishing Stands in a Hot Strip Mill,” Korean Society for Noise and Vibration Engineering 1994; 1(4), 43–50,.

. Wu, Y. X. and Duan, J. A., Frequency modulation of highspeed mill chatter, J. Mater. Process. Technol. 2002; 129: 148–151.

. Youngdeuk Kim, Chang-Wan Kim, Sungjin Lee, and Hyunchul Park. Dynamic Modeling and Numerical Analysis of a Cold Rolling Mill. International Journal of Precision Engineering and Manufacturing 2013; 14(3): 407–413.

. Xiang LI, Li-yan HAN, Yong-sheng ZHU, et al. Fault diagnosis based on nonlinear dynamic modeling in tapered roller bearing. Journal of Vibration and Shock 2014; 33(S):128–131.

. Jing Zhao. Vibration analysis of 1780 HSM R1 machine. Qinhuangdao: Yanshan University, 2011.

.Dick Petersen, Carl Howard, Nader Sawalhi, et al. Analysis of bearing stiffness variations, contact forces and vibrations in radially loaded double row rolling element bearings with raceway defects. Mechanical Systems and Signal Processing 2015; 50–51: 139–160.




DOI: https://doi.org/10.33142/me.v1i1.664

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.