| 摘要 |
<p>PURPOSE:To improve the quality of products in hot rolling of a bar-like metallic material by detecting the two of the temp. and size in the same part of a rolled material and controlling the cooling and rolling reduction of the rolled material. CONSTITUTION:While a steel bar 1 is fed perpendicularly to the plane of the figure, the bar is cooled and rolled. A part of the image thereof in the longitudinal direction is formed in an image sensor 3, and the change in the height of the envelope of the output signal thereof is detected, whereby the temp. and size in said part of the steel bar are detected. A control signal for cooling and rolling reduction is fed to controllers 18, 19 for cooling and rolling reduction in accordance with said detection, whereby the controllers 18, 19 are controlled with respect to the bar 1. According to such method, both of the cooling and rolling reduction are adequately controlled considering the mutual influences; in this way, products having high quality are obtd.</p> |
