| 摘要 |
<p>PURPOSE:To control the plate thickness within the allowable deviation and to prevent the break of weld zone by providing the means to detect the weld zone of a matallic strip and to regulate the roll intervals at the time of rolling reduction. CONSTITUTION:A signal is inputted into a delay circuit 16A with detecting a weld zone 6 of a metallic strip 2 by a weld zone detector 8 and also the running speed of the metal strip 2 is detected by a pulse transmitter 14A and inputted into the delay circuit 16A. The delay circuit 16A calculates the time spent by a weld zone 6 in arriving at the rolling reduction position of a rolling mill 4A, issues a fastening command of the rolling mill 4A to automatic plate thickness controlling device 12A and performs the control of rolling reduction cylinder 18A. Simultaneously also the revolving speed of a driving motor 10A is regulated to weaken the tension of the strip 2. It is thus prevented that the weld zone 6 has thicker plate thickness in case of rolling reduction.</p> |
