| 摘要 |
PURPOSE:To prevent the breakage of a steel strip by detecting the edge defects of a steel strip before cold rolling, and discriminating the necessity for removing the defects and that for reducing the speed of a mill, to store the defect positions and to output control commands to a defectremoving device and the rolling mill. CONSTITUTION:After the degree and size of a defect detected by an edge-defect detector 3 is evaluated by a microcomputer 11 provided to the detector 3, and the position of the defect in the longitudinal direction of a coil is simultaneously recognized by a coil-length detector 5; the information is transmitted to a host computer 14. Based on these informations, the computer 14 outputs a control command to the control panel 12 of an edge-defect removing device 4 and the control paned 13 of a mill 6. Specifically speaking, the command of the timing and cutting allowance of sheet-end cutting is transmitted to the device 4, and the signal and the command of the reduction of rolling speed, at the time when the cut-part of sheet end passes through a roll gap, are transmitted to the mill control panel 13. By the above-mentioned controls, the breakage of a steel strip is prevented. |
