CONTINUOUS ROLLING MILL

摘要

PURPOSE:To control stably the tension of a material to be rolled by compensating the gain of a tension control calculator of a continuous rolling mill according to the gain of an automatic sheet thickness control device then controlling the speed of rolling rolls on an upper stream side. CONSTITUTION:The tension of the material 3 to be rolled between the rolling rolls 1 and 2 is detected by the tension detector 4 and is compared with the reference value from a reference tension setter 5 by which the deviation is calculated in the continuous rolling mill for rolling the material 3 by the rolls 1, 2. A reference speed compensation quantity is determined by the tension control calculator 6 according to such deviation and is outputted to a gain adjuster 11. The above-mentioned compensation quantity is serially compensated by the scale factor of a mill constant control system taken in by the automatic sheet thickness control device 12 for the rolling rolls 1 on the upper stream side and is then outputted to a speed control device 7. The rotating sped of a main motor 8 of the rolls 1 is adjusted in accordance with the above- mentioned compensation quantity after said gain adjustment, by which the tension on the material 3 is controlled.