Flatness measuring device, hot rolling mill and method for operating a flatness measuring device

摘要

The invention relates to a flatness measuring device (1) for measuring a flatness of a hot strip (2) within a hot rolling plant, having at least one inlet-side deflection roller (3) for contacting a first large side of the hot strip (2),at least one outlet-side deflector (5) for contacting the first large side of the hot strip (2) and at least one arranged between the inlet-side deflector (3) and the outlet-side deflector (5) with respect to a strip running direction (6) of the hot strip (2), A central deflector acting as a flatness measuring roller (7) can be adjusted against a second large side of the hot strip opposite the first large side of the hot strip (2). In order to prevent lateral running of the hot strip (2) in a hot rolling mill during a flatness measurement on the hot strip (2),the flatness measuring device (1) has at least one detection device (8) for detecting an actual position (list) of the hot strip (2) and at least one adjustment device (9) connected to the detection device (8) and at least one of the deflection rollers (3, 5, 7), which is equipped, an angle (α) between a longitudinal central axis (10) of the deflector (3, 5, 7) connected to the adjusting device (9) and a longitudinal axis (11) of the flatness measuring device (1) perpendicular to the deflector (3, 5, 7) as a function of a deviation of the actual position (List) of the hot strip (2) from a predetermined Set position (LSoll) of the hot strip (2).