| 摘要 |
PURPOSE:To increase the spread, by giving overall reduction using the horizontal or vertical roll, before giving a partial reduction using the partially reducing type horizontal roll. CONSTITUTION:The partially reducing type horizontal roll has two ring type protuberances whose diameter is D, breadth is W, height from the drum surface is H, and interval between midst of both ring type protuberances is (l); this partially reducing type horizontal roll is used together with another horizontal roll with flat drum. For the purpose of comparison, the rolling is carried out by above partially reducing type horizontal roll independently, without using the horizontal roll of the same size installed nearby the upper stream of the partially reducing type horizontal roll. The result of this comparison is shown in the correlation graph for the rolling reduction and the spread in the partially reducing type horizontal roll. In the graph, the black round mark shows the case of independent partially reducing type horizontal roll, and the white round mark shows the case of the roll by this invention. The graph indicates that the spread of the slab obtained by the roll of this invention is extremely larger than that obtained by an independent partially reducing type horizontal roll. |
