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  • Development of systems to aid flexible rolling of long products to closer tolerances by on-line calculation of loaded roll gap, control of stand speeds and reheat


Final report on Contract No 7210-PR/086, 1 July 1998 to 31 December 2001.

A control methodology for long-product mills to achieve close tolerances by combining roll-gap measurement, FE modelling and temperature control is proposed.

Corus evaluated electromagnetic and optical measurement of loaded roll gap. Both technologies achieved the required accuracy, but electromagnetic sensors are recommended in the industrial environment, since the optical solution requires costly protection. BFI developed software-permitting development of statistical models describing the temperature distribution at each process step. At CSM, a procedure for offline numerical simulation of rolling schedules has been built.

A scheme combining these three elements is proposed. Initially, this would be confined to a few stands, given the cost of modelling, and a need to extend it to multi-grooved reversing roughers. Implementation requires definition of a temperature range for each process step and material and collaboration with suppliers to decouple roll-float from roll-gap sensors.

Additional information

Authors: THORP J H, Corus UK Ltd, Rotherham (GB);JOHNSON C P, Corus UK Ltd, Rotherham (GB);DIONISIVICI F, CSM, Rome (IT);BIANCHI J H, CSM, Rome (IT);DAHM B, BFI, Düsseldorf (DE);MEHREN D, KEP, Siegen (DE)
Bibliographic Reference: EUR 20473 EN (2002), pp.129. Euro: 20.50
Availability: EUR-OP reference: KI-NA-20473-EN-S Available from EUR-OP sales agents URL:
ISBN: ISBN: 92-894-4280-8
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