| 摘要 |
<p>PURPOSE:To prevent the deficiency of heating in the edge parts of sheet bar by moving induction heating coils with which both edge parts of sheet bar is heated vertically in accordance with the warping quantity of each edge part. CONSTITUTION:In a edge heater 4 which a pair of induction heating coils 5a, 5b, 6a, 6b between which both edge parts 1a, 1b of the sheet bar 1 which is transferred with carrier rollers 3 are put are provided on each of both the edge parts of the sheet bar and which both the edge parts 1a, 1b are heated with the induction heating coils 5a, 5b, 6a, 6b, the warping of the sheet bar 1 is individually measured with two laser range finders 9a, 9b which are faced to the surface or under surface of each of both edge parts 1a, 1b on the inlet side of the edge heater 4. And the induction heating coils 5a, 5b, 6a, 6b are individually and vertically moved in accordance with the measured values with the laser range finders 9a, 9b. Therefore, the deficiency of heating can be prevented because the distances between each of the induction heating coils 5a, 5b, 6a, 6b and the edge parts 1a, 1b of the sheet bar 1 isn't unnecessarily enlarged.</p> |
