| 摘要 |
PURPOSE:To detect weld points at a high accuracy with a simple equipment, by judging that a weld point exist at the pinch roll position when a tracking signal is compatible with an output as variations in the rolling force of a pinch roll. CONSTITUTION:A controller 21 obtains a tracking signal generated from a length measuring device 23. When a weld point being tracked reaches a squeeze roll 15, the rolling force of the squeeze roll 15 varies with changes in the thickness caused at a strip weld part. A rolling force detector 24 detects variations in the rolling force and outputs a rolling force variations signal P when the speed and value of the change exceeds a certain set value. When the tracking signal is compatible with the rolling force variations signal, the controller 21 determines that the weld part exists at the position of the squeeze roll 15 and outputs a weld point detection signal W to be transmitted to a rolling force adjustor 22. |
