CPC B21B 37/16 (2013.01) [B21B 17/14 (2013.01)] | 17 Claims |
1. A method, comprising:
providing a stretch reducing rolling mill having a plurality of roll stands (7) arranged one behind the other in a conveying direction of a pipe (6) to be rolled;
determining, by a wall thickness measuring device (2-2, 9), a wall thickness progression (4) of the pipe (6) to be rolled prior to rolling;
continuously measuring a current longitudinal coordinate (lx) of the pipe (6) by a pipe position measuring device (8) arranged in front of the plurality of roll stands (7) in the conveying direction;
transmitting the measured values of the longitudinal coordinate (lx) of the pipe (6) to a control unit (1A, 1B); and
controlling, by the control unit (1A, 1B), respective rotational speeds of the plurality of roll stands (7) during the rolling of the pipe based on the determined wall thickness progression (4) and the transmitted measured values of the current longitudinal coordinate (lx) of the pipe, in order to compensate for wall thickness variations of the pipe.
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