Patent ID: 7059163

Claim:
Rolling stand with a pair of CVC rolls, preferably a pair of CVC working rolls ( 1 , 1 ′) and a pair of backup rolls ( 2 ), which have a contact area b cont , in which a horizontally-acting torque (M) is present, which leads to a skewing of the rolls ( 1 , 2 ) and thus to axial forces in the roll bearings, wherein the torque (M) is minimized by a suitable CVC grind, where the change in the radius (the contour) of the CVC rolls is described by the polynomial equation R ( x )= a 0 +a 1 ox+a 2 ox 2 +. . . a n ox n where: R(x)=the change in the radius; x=the coordinate in the longitudinal direction of the barrel; a 0 =the actual radius of the roll; a 1 =the optimization parameter (wedge factor), which is determined offline as a mean value from various displacements of the CVC rolls with respect to each other; and a 2 to a n =the adjusting range of the CVC system, where the CVC grind with an optimized wedge shape is designed so that a tangent ( 8 ′), which contacts a diameter ( 7 ′) at one end and a convex part of the roll ( 1 ′) and a tangent ( 10 ′) which contacts a diameter ( 9 ′) at the other end and a concave part of the roll ( 1 ′) are parallel to each other but slanted to the roll axes by an optimum wedge angle (α).