Patent ID: 7367209

Claim:
Method for optimizing shifting strategies as a function of strip width for the best possible utilization of the advantages of CVC/CVC plus technology in the operation of strip edge-oriented shifting in four-high and six-high rolling stands, comprising a pair of work rolls ( 10 ) and a pair of backup rolls ( 12 ) and, in addition, in the case of six-high rolling stands, a pair of intermediate rolls ( 11 ), wherein at least the work rolls ( 10 ) and, in the case of six-high rolling stands, the intermediate rolls ( 11 ) interact with axial shifting devices, and wherein each of these intermediate rolls ( 10 , 11 ) has a barrel lengthened by the amount of the CVC shifting stroke with a one-sided setback y(x) in the area of the barrel edge, wherein each work roll ( 10 ) also has a barrel lengthened by the amount of the CVC shifting stroke with a one-sided setback y(x) in the area of the barrel edge, and, in the same way as the intermediate roll ( 11 ), the work roll ( 10 ) is positioned in various positions (P) relative to the strip edge ( 14 ) by predetermination of the shift positions (VP) of the shiftable work rolls/intermediate rolls ( 10 , 11 ) as a function of the strip width, and within different strip width regions (B), the shift position (VP) of the given roll is predetermined by a piecewise-linear step function.