| 摘要 |
<p>PURPOSE:To improve the effect of energy saving in the time pitch control by estimating both the time interval between a preceding work piece and a succeeding work piece and the period of time required from the time the power supply turned off to the time the power supply turned on. CONSTITUTION:A time pitch control device 10 which is mainly composed of a microcomputer, is allowed to make an estimate of the conveyance of both a preceding work piece 8 and a succeeding work piece 9 so as to determine the pitch TEXT of extraction from plural furnaces. At this moment, a time pitch between the preceding work piece 8 and the succeeding work piece 9 at each of machines 7 is estimated on the basis of the computation, in which the amount of expansion of each of work pieces when pressed and rolled by each of machines 7 is taken into consideration. And let the estimation for them be TR1-TR3 for a coarse mill group and TP1-TP6 for a finishing mill group. Besides, the period of time required from the time the power supply turned off to the time the power supply turned on for each drive device of machines 7 is estimated to be TER1-TER3 and TEF1-TEF6. Then, both estimation times are compared each other on each machine so as to determine how far energy saving should be controlled.</p> |
