| 摘要 |
PURPOSE:To prevent the generation of scabs on the beam blank out from rough rolling in the stage of rolling a beam blank for rolling of shape steels with roughing mills by forming chamfered parts beforehand in the corner parts at the leading and trailing end of the flanges of the beam blank. CONSTITUTION:In the case of rolling a beam blank 11 for rolling of shape steels with a roughing mill 2, the corner parts at the leading and trailing ends of the flanges of the blank 11 are beforehand chamfered 11a by, for example, gas cutting or the like. Even though the blank 11 out from the mill 2 cambers downward, the parts 11a merely rub table rollers 3 and therefore no wraplike spills are produced, and a molded shape steel 11' having no scabs on the inside and outside surfaces of the flanges is obtained, and the yield of the product is improved. |
