CONTINUOUS ROLLING METHOD

摘要

PURPOSE:To obtain a rolled stock of good quality by rolling while flying changing the rolling reduction and roll cross angle in a roll cross rolling mill from an angle that the optimum rolling reduction and mechanical crown are imparted to a preceding material to the optimum rolling reduction and angle for the succeeding material. CONSTITUTION:When continuous rolling is executed while joining plural materials to be rolled, at least one stand of the rolling mills is taken as the roll cross rolling mill 4 of which the roll cross angle is changeable during rolling. Simultaneously, the roll cross angle is flying changed at the position of seam between the preceding and succeeding materials to be rolled. At the time of this change, the rolling reduction and cross angle of the succeeding material to be rolled are calculated from its dimension and material. The time for adjusting position of roll gap and time for adjusting roll cross angle are determined from the difference between the obtained value and that of the preceding material and operating time that is required for adjusting is changed so as to bring the other adjusting time into coincidence with the longer time. In this way, the rolled stock of good quality can be continuously produced under good productivity and yield.