Measuring device, roll stand and method of detecting the height of a roll gap

Roll stand (200) comprising two working rolls (210-1, 210-2), which span a rolling gap for rolling a metal strip;

• and
• san HS displacing device (230) for displacing the working rolls in or against the rolling direction from a starting position to an end position;
• characterized by a roll gap transmitter (110) for detecting the height (H) of a roll gap between the two working rolls (210-1, 210-2) when the roll gap transmitter is in a suitable relative position with respect to the working rolls;
• an initialization device (120) for detecting the displacement of the work rolls in or against the rolling direction from the starting position to the end position;
• and
• a roll gap transmitter displacing device (130) for displacing the roll gap transmitter (110) in dependence on the displacement, which is detected by the initialization device, of the working rolls in or against the rolling direction into the relative position, which is suitable for detecting the height of the roll gap, with respect to the working rolls in the end position.

Method of measuring the height of a roll gap (H) between two working rolls in a roll stand (200), comprising the following steps:

• positioning the working rolls (210-1, 210-2) in a starting position;
• positioning a roll gap transmitter (110) in a relative position, which is suitable for detecting the height of the roll gap, with respect to the working rolls in the starting position;
• detecting a displacement of the working rolls in or against the rolling direction from the starting position to an end position;
• and
• moving the roll gap transmitter in or against the rolling direction in dependence on the detected displacement of the working rolls into the relative position, which is suitable for detecting the height of the roll gap, with respect to the working rolls in the end position.