| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely detecte and track a joined part and to surely remove the joined part after rolling by generating artificial flaws in the joined part by removing burrs generated, leaving a part of the burrs before rolling and detecting the artificial flaws by a joined-part detecting means after finish rolling. SOLUTION: A flying joining device 2 is arranged between a heating furnace 1 and a roughing mill 4 and, furthermore, a deburring device 3 is arranged between the flying joining device 2 and the roughing mill 4. Two billets to be joined are glasped with a glasping device which doubles as an electrode and, after that, flash butt welding is executed. In the deburring device 3, the edge of a cutting tool is arranged so as to be parallel to a rolled stock and the burrs are removed by cutting the burrs with the edge by the movement of the rolling mill with rolling. In deburring, the burrs are removed leaving specified height. After removing the burrs leaving a part of the burrs, rolling is executed. Remaining burrs become overlapping flaws by rolling and the flaws are detected with the joined part detecting means 10 combined a rolled stock detector.</p> |
