In common with other rotating machines, rolling mills are prone to many different vibrations during rolling and most do not cause a problem. However, there are several types of rolling mill vibration that can have a significant impact on the quality and/or productivity of the cold rolling process.
The two common forms of rolling mill vibration that are most difficult to solve are third octave gauge chatter and fifth octave chatter. Both can cause significant strip quality issues if they occur on a mill. There is always a source of vibration responsible for fifth octave chatter so a solution can usually be found to this type of problem. This usually involves careful experimental vibration measurements. Third octave gauge chatter vibration, however, is particularly difficult to solve because it is self-exciting so can occur with no source of forced vibration. The problem usually represents a speed limit on cold mills and can cause significant loss of productivity.
There’s more information about the theory of rolling mill vibration in the links at the bottom of this page.
This vital tool assists in the solution of rolling mill vibration problems faced by the entire metal rolling industry. It is a finite element-based model that uses available mill data to predict all the key natural resonant modes of vibration of any rolling mill.
This model simply requires the dimensions of the mill stand from technical drawings.
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