| 摘要 |
<p>PURPOSE:To keep the high accurate plate thickness with a tension between stands stably covering the total coil length by correctively controlling a rotating speed of the stand preceding the final stand and of the final stand based on outputs from a controlled variable arithmetic unit. CONSTITUTION:A tension detected by a tension meter 7 set between the stand 2 preceding the final stand 3 and the final stand 3 is compared with the tension target value 12 at a controlled variable arithmetic unit 22. Then, proportional plus integral arithmetic is performed and a control command is outputted to correct a plate thickness at the outlet side of the stand 2 to be thinner. A screwdown position correcting device 23 of the stand 2 controls a screwdown device 21 so as to correct a screwdown position of the stand 2 in the direction where a roll gap is closed. Outputs of the unit 22 are inputted into a roll speed correcting device 24 of the stand 3 and the device 24 calculates and outputs a command decreasing the final stand roll speed so that a plate thickness at the outlet side of the stand 2 corrected by the device 23 does not affect a finished plate thickness.</p> |
