Stability Boundaries and Operational Strategies for Chatter Suppression in Cold Rolling Mills

This paper investigates third-octave chatter in cold rolling and defines the associated stability boundaries using reduced-order dynamic models. It illustrates how specific parameter constellations can induce self-excited vibrations and process instability. Through parameter and sensitivity analyses, the study identifies critical design and operational parameters for enhancing system robustness. A central contribution is the implementation of a stabilizing closed-loop controller that applies velocity-proportional damping forces to the rolling mill. This active damping strategy effectively suppresses chatter in real time without compromising rolling speed, offering a scalable solution for both design-phase optimization and operational vibration mitigation.

Authors:

Martin Bergmann | Primetals Technologies Austria
 

Konrad Krimpelstaetter | Primetals Technologies Japan
 

Session Chairs:

Ken Hutter | Belden-Hutter, Inc.
 

Brian Smith | ANDRITZ Metals USA Inc.
 

Bridget Darby | United States Controls, Inc.
 

Paul Kadilak | ANDRITZ Metals USA Inc.