| 摘要 |
<p>PURPOSE:To provide a rolling method by which the inner width of a web can be controlled by giving a continuously expansible or contractible tension between mills when a wide flange-shape steel is hot-rolled. CONSTITUTION:When a wide flange-shape steel 12 is rolled with a group of universal mills composed of a group A of universal roughing mills composed of a 1st universal roughing mill 1, a 1st edger mill 2 and a 2nd universal roughing mill 3 and a group B of universal finishing mills composed of an intermediate universal mill 4, a 2nd edger mill 5 and a universal finishing mill 6, a large tension is added between at least two stands of the 2nd edger mill 5 and the universal finishing mill 6 to contract the inner width of the web. On the other hand, to in the case of enlarging the inner width of the web, a tension between the two stands is removed or a small pushing force is added between the two stands to automatically control the inner width of the web.</p> |
