Method and device for positioning at least one roll segment of a strand guiding unit against a strand

摘要

A method for adjusting a roll segment of a strand guide of a slab-casting installation against a strand, wherein the roll segment has an upper and a lower roll support that each have an adjusting element for adjusting the two roll supports relative to each other. The method includes individual control of the individual adjusting elements, wherein the actual profile of the strand, including the heights of the right and left lateral edges of the strand, is detected and compared with a set profile that includes a predetermined set height, which is the same for the right and left lateral edges, and the individual adjusting elements of the roll segment are individually controlled based on the control deviation that results from the comparison so that the actual profile is adapted to the set profile, including equalization of the heights of the right and left lateral edges of the strand.

主权项

1. A strand guide for guiding a strand after it vertically leaves a casting installation having a mold with mold walls, which strand guide comprises:
at least one roll segment arranged downstream of the mold with an upper and a lower roll support, where each roll support has a plurality of rolls for guiding the strand between the rolls after it leaves the casting installation, wherein the at least one roll segment diverts the strand from vertical to horizontal when the strand has a liquid core; at least one adjusting element each on the right and left sides of the roll segment, as seen in the direction of material flow, for adjusting the upper and lower roll supports relative to each other, each adjusting element being arranged to act equally on both the upper roll support and the lower roll support, the at least one adjusting element being arranged where the strand has a liquid core and upstream of an exit of the roll segment; and a closed-loop control unit for individually controlling the adjusting elements; wherein an optical profile detection unit arranged at the exit of a last roll segment of the strand guide to the cross section of the strand when completely solidified at the exit of the last roll segment of the strand guide as an actual profile, including detecting the heights of the right and left lateral edges of the strand; and the closed-loop control unit is operative to control the adjusting elements of the roll supports where the strand has a liquid core based on a control deviation that results from a comparison of the detected heights of the right and left lateral edges of the solidified strand at the exit of the last roll segment by the detection unit with a set height so that the actual profile is adapted to a predetermined set profile with set heights that are the same on the right and left lateral edges of the strand so as to prevent a wedge-shaped strand cross-section from forming.