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The Effect of Rolling Speed and Friction on Cold Rolling Mill Stability

[+] Author Affiliations
Y. S. Kim, N. Zhang, J. C. Ji

University of Technology, Sydney, Sydney, NSW, Australia

W. Y. D. Yuen

BlueScope Steel Research, Port Kembla, NSW, Australia

Paper No. IMECE2012-85396, pp. 291-299; 9 pages
doi:10.1115/IMECE2012-85396
From:
  • ASME 2012 International Mechanical Engineering Congress and Exposition
  • Volume 12: Vibration, Acoustics and Wave Propagation
  • Houston, Texas, USA, November 9–15, 2012
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4528-8
  • Copyright © 2012 by ASME

abstract

In order to investigate the validity of a coupled mill vibration model presented in the dynamic rolling formulation, this paper presents the results of dynamic characteristics examining rolling force variations in response to rolling parameters. Under the given steady state rolling condition, the unstable vibrational modes with corresponding frequencies are identified and stability analysis is also performed to demonstrate that the proposed model is highly dependent on the rolling speed and friction coefficient with an assumed negative gradient of friction coefficient. To further find the transient characteristics and the direct influences of the friction coefficient and rolling speed on the mill chatter, the derived equations of motion of the system are solved using Runge-Kutta numerical integration method. Simulations are carried out to reveal the chatter sources, which gives rise to unstable rolling vibrations.

Copyright © 2012 by ASME

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