Interdependence between High-Speed Mill Chatter and Unsteady Lubrication of Metal Rolling Process

Abstract:

A metal-rolling process with chatter is chosen as the case for analysis. An isothermal, full film unsteady lubrication model is developed. The influences of time dependent variables such as back tension stress, variation on lubrication are investigated. By utilizing this model, roll forces and torque variation with respect to time can be successfully predicted. Chatter vibration in cold rolling due to unsteady lubrication phenomena is discussed. The current unsteady lubrication theory indicates that, when the nondimensional frequency of back tension stress variation is in a specific range, the roll force and torque variations can be significantly “amplified”.

• Periodical: Applied Mechanics and Materials (Volumes 246-247)
• Pages: 1304-1308
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.246-247.1304
• Online since: December 2012
• Authors: Qiao Yi Wang, Yao Zhu, Yong Zhao
• Keywords: Chatter, Metal Rolling, Unsteady Lubrication

References

[1] Moller, R. H. and Hoggart, J. S.: J. of the Australian Inst. Of Metals, Vol. 12 (1967), No. 2, pp.155-164.

[2] Gallenstein, J. H.: Iron and Steel Engineer (January 1981), pp.52-57.

[3] Yarita, I., Furukawa, K., et al.: Trans. Iron and Steal Inst. Of Japan, Vol. 18 (1978), pp.1-10.

[4] Lo, S. W.: Journal of Tribology, Vol. 116 (1994), pp.640-647.

[5] Tlusty, J., and Chandra, G., Critchley, D., Paton, D.: Annuals of C. I. R. P., Vol. 31 (1982), No. 1, pp.195-199.