Vibration monitoring of tandem mills at the Arcelor Mittal Tilleur cold rolling mill

摘要

Chatter vibration can affect both the quality and production capacity of cold rolled steel if it is not properly monitored and 'reduced. 3rd order octave chatter is a self-generating resonance caused by the inter-reaction of the strip and mill and can quickly reach destructive proportions if the speed is not reduced quickly enough. 5th order chatter is also a resonant condition, but it is most often excited by machine defects that can result in visual barring of the strip if the source of the excitation is not removed. The Tilleur cold rolling mill is one of six different plants that are all involved in cold rolling and finishing processes in the Liege area under Arcelor Mittal's flat carbon steel sector (APPW, Arcelor Produits Plats Wallonie). Tilleur has 391 employees and produces 1.87Mt of cold-rolled full-hard mild carbon steel coils each year (Fig 1).