| 摘要 |
<p>PURPOSE:To enable an automatic drive for performing speed control automatically without reducing productivity by unnecessary deceleration and causing an excessive disturbance to a central processing section when a remaining amounts of an inlet side looper and an outlet side looper are controlled in a continuous steel plate processing line. CONSTITUTION:When the remaining amount of the looper is being reduced, a speed setting calculation is performed at a fixed cycle, when a handling work is completed and the remaining amount of the looper increases, the speed of processing of the central section, e.g. of temperature control is accelerated at an acceleration rate to be the largest possible rate of variation of load to return the speed. A computing element 17 calculates a target speed of each coil from a passing condition such as a plate size and required heat cycle and an equipment capacity to be given to computing elements 13, 14 and an intermediate limiter 19. The intermediate limiter 19 checks the upper and lower limits of an output VF of the computing element 15 and calculates and outputs a speed command value VS to be given actually to a motor speed controller 20. The motor speed controller 20 operates a driving motor 23 for a bridle roll 21 so that the line speed takes VS.</p> |
