Single- and multi-stand chatter models in tandem rolling mills

Huyue Zhao*, Kornel Ehmann

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Many different modes of chatter and their possible causes have been identified after years of research, yet no clear and definite theory of their mechanics has been established. One of the most important reasons for this can be attributed to the fact that only oversimplified models with a single input and a single output were historically used to formulate chatter in rolling. Such a situation has hindered a complete analysis of the underlying mechanisms. In this paper, a state-space representation of single- and multi-stand chatter models will be proposed in a rigorous and comprehensive mathematical form for stability analysis of the various chatter mechanisms. First, a dynamic model of the rolling process that utilizes homogeneous deformation theory will be established that includes the material strain-hardening and work roll flattening effects. By coupling this dynamic rolling process model with a structural model for mill stands, a single-stand chatter model in a state-space representation will be proposed. Based on the single-stand chatter model, a multi-stand chatter model will be formulated by incorporating the inter-stand tension variations and the time delay effect of the strip transportation. A simulation program will also be presented for the study of the dynamic rolling process in the time domain and for verifying the results from stability analysis.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC2008
Pages627-637
Number of pages11
Volume1
DOIs
StatePublished - Dec 1 2009
EventASME International Manufacturing Science and Engineering Conference, MSEC2008 - Evanston, IL, United States
Duration: Oct 7 2008Oct 10 2008

Other

OtherASME International Manufacturing Science and Engineering Conference, MSEC2008
CountryUnited States
CityEvanston, IL
Period10/7/0810/10/08

Keywords

  • Rolling dynamics
  • Rolling stability
  • Self-excited vibration
  • Third-octave-mode chatter

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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