Mechanical working (rolling mills) : Development of modal analysis for rolling millsFunded under: ECSC-STEELRES 8C
Rolling mills and associated plant for steel strip production operate at high speeds with high dynamic forces. These can generate vibration at specific resonant frequencies and modes. Modal analysis defines the three-dimensional amplitudes at many points on the structure or component. This report describes how the technique has been applied to three single stand temper mills, a five-stand mill, and a tension leveller to demonstrate various aspects of its use. One application to a temper mill highlighted the effect of surface damage to a back-up roll initiation resonant vibration. The results of the analysis on another temper mill enabled a change to be made in operating practice which avoided rolling speeds likely to cause resonant vibration and strip marking. Comprehensive modal analysis of a third temper mill established the complex vibration modes, in three dimensions, of the major components. The use of the technique applied to a tension leveller enabled the elimination of roll vibration as a source of cyclic strip marking. A surface measuring system using a laser gauge was found to be the most suitable for measuring the small changes in strip surface topography caused by mill/roll stack vibration.
Bibliographic Reference: EUR 14792 EN (1994) 47 pp., FS, ECU 8.50
ISBN: ISBN 92-826-7731-1
Record Number: 199510597 / Last updated on: 1995-05-23
Original language: en
Available languages: en