Dr Matthias Kruger and Sebastian Richard from Research and Development of SMS group, explain means and methods to eliminate undesired vibrations in cold rolling processes. Mr Kruger, why do vibrations in cold rolling mills present problems? Kruger: Cold-rolling of steel or aluminium, especially in multi-stand mills and at high speeds, is accompanied by different types of vibration. They are extremely critical since they may impair the quality of the rolled strip. In addition, certain modes of vibration can only be compensated by lowering the rolling speed, which in turn has a detrimental effect on mill productivity.
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