| 摘要 |
<p>PURPOSE: To suppress the variation of the height of checkered part in the longitudinal direction and to improve the quality by controlling the draft or rolling load at a stand in which checkered rolls are incorporated so as to make it constant in the longitudinal direction of a sheet bar. CONSTITUTION: By arranging the work rolls 2a, 2b and back-up rolls 3a, 3b in the respective stands of a finishing mill 1, providing load cells 41 -4n and thickness gages 51 -5n , inputting their measured signals to a screw-down location controller 6 and executing arithmetic processing, roll gaps are controlled through screw-down devices 71 -7n . By measuring thickness on the outlet side of an i-th stand in which the checkered rolls are incorporated, continuously calculating the target thickness on the (i-1)th stand one before that stand and correcting the screw-down location of the rolling rolls of the (i-1)th stand so as to get the target thickness, the uniform height of the checkered part is obtained.</p> |
