| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for determining a shape of a rolled material on a sizing press outlet side in a hot rolling line capable of rapidly detecting the twist of the rolled material on the sizing press outlet side with excellent accuracy when a dog bone is formed on both sides of the rolled material, and the rolled material is twisted. <P>SOLUTION: A side face of a rolled material 8 to be conveyed on a sizing press 9 outlet side of a hot rolling line 100 is image-picked up from both a drive side and a driven side of the hot rolling line 100. The upper end positions A1<SB>n</SB>(n = 1 to n+1) and the upper end positions A2<SB>n</SB>(n = 1 to n+1) of a dock bone of the rolled material 8 are detected on both the drive side and the driven side of the hot rolling line 100. When the difference present between the upper end positions exceeds a predetermined thresholdα, it is determined that the rolled material 8 is twisted. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
