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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 27
SUMMARY:Increased width performance due to use of a radar width measurement in the roughing mill
DESCRIPTION:An excellent width performance is indispensable to enable stable, efficient and sustainable production. Since width control in hot rolling mills is almost exclusively possible in the roughing mill, the width measurement in the roughing mill is of particular importance. Radar technology has proven to be suitable for such applications due to its robustness and precision even under the harsh environmental conditions including steam, dust and high temperatures.

In the hot strip mill in Salzgitter, a radar width measurement is installed between the slab sizing press and the roughing mill immediately upstream to the edger and used for several tasks in order to optimize the transfer bar and therewith finally the finishing strip width:
First, the width error coming from the slab sizing press is calculated by comparing the slab width measured in the radar gauge and the setup width of the press. A possible width error is corrected by an adaption model in the pass schedule model PSC® and given as an additional offset to the slab sizing press for the subsequent slab.
Second, the measured strip width is considered in the PSC® within the recalculations of the reversing passes in the roughing mill. Based on the reliable measurements, updated width information are used to calculate new setups for the next subsequent combinations of width- and thickness-reductions in the roughing mill.
Third, the information from the radar gauge are used in the level 1 control system for plausibility checks in order to optimize the tracking accuracy and therewith the short stroke control at the slab ends in the edger.

With these measures, the width errors and above all the excess width at the strip end could be significantly reduced. Further improvements can be achieved by considering the measurements in the short stroke control to avoid necking respectively excess widths.

CLASS:PUBLIC
DTSTART:20230615T090000
DTEND:20230615T092000
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