Community Research and Development Information Service - CORDIS


Final report on Contract No 7215-CA/310, 1 April 1996 to 30 September 2000

The main objective of this project was to test the capability and reliability of a dynamic shape roll (DSR) in a cold rolling mill and to evaluate its potential for the improvement of product flatness. A DSR was installed at the last stand of the tandem cold rolling mill of the Biache plant at Sollac. At the start-up, important problems were encountered and required a modification of the installation. Since June 1998 the installation has been working better (less than 15 minutes of mill stop by 40kT) but a few modifications have had to be made to optimise the process. A mill model has been validated on the basis of roll gap pressure measurements. The model has been used to extrapolate DSR performances for high rolling forces.

The efficiency of the flatness actuators is characterised experimentally by means of static pressure sensors placed in the roll gap at the final stand; the results serve for the validation of the elastic mill model. The DSR is compared to several conventional flatness actuators. The real flatness benefits are determined with the help of a shape meter located at the exit of the mill. After several improvements to the regulation systems, the flatness has been improved and it appeared that there is a significant improvement of strip shape in the case of wide products up to 30%. The wider the strip, the higher the benefits.

Additional information

Authors: KEGRAND N, Sollac, Puteaux (FR);VALLET D, Sollac, Puteaux (FR)
Bibliographic Reference: EUR 20303 EN (2002), pp.54. Euro: 8.50
Availability: EUR-OP reference: KI-NA-20303-EN-S Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3443-0
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top