Roll stand for rolling a product, in particular made of metal

摘要

The invention relates to a roll stand for rolling a product, in particular made of metal, comprising a pair of first rollers contacted by a pair of second rollers supporting the first rollers, wherein the first roller and the second rollers have an asymmetrical radius curve (CVC grind) relative to a center plane, wherein the radius curve of the first rollers is represented by a polynomial of the third or fifth order. In order to design the wedging of a second roller supporting a first roller such that optimal operating conditions are set, the invention proposes that the radius curve of the second roller is given by a polynomial of the third or fifth order, wherein special relationships are prescribed for the ratios between the coefficients.

主权项

1. A roll stand for rolling a product, comprising a pair of first rolls in contact with a pair of second rolls that support the first rolls, wherein the first rolls and the second rolls have a radius curve (CVC cut) that is asymmetric relative to a center plane, wherein the radius curve of the first rolls satisfies the following equation:
RAW(x)=a0+a1·x+a2·x2+a3·x3 where
RAW(x): radius curve of the first roll x: coordinate in the longitudinal direction of the barrel with the origin (x=0) in the barrel center a0: actual radius of the first roll a1: optimization parameter (wedge factor) a2, a3: coefficients (adjustment range of the CVC system),wherein the radius curve of the second rolls satisfies the following equation:
RSW(x)=s0+s1·x+s2·x2+s3·x3 where
RSW(x): radius curve of the second roll x: coordinate in the longitudinal direction of the barrel with the origin (x=0) in the barrel center s0: actual radius of the second roll s1: optimization parameter (wedge factor) s2, s3: coefficients (adjustment range of the CVC system)where the following relation exists between the given variables:
s1=f1·[RSW/RAW·(b2contAW−b2contSW)·a3+b2contSW·s3]where
bcontAW: contact length of the two first rolls bcontSW: contact length between the first and second roll or length of the second roll f1=−1/20 to −6/20,wherein the wedge factors a1 and s1 are optimized to prevent horizontal rotational moments or axial forces,wherein the first rolls have a CVC contour configuration different from the CVC contour configuration of the second rolls.