To provide a method of manufacturing an unequal angle steel having unequal thickness, by which better rolling is performed while unnecessitating a forced water cooling stage which is performed at the front and rear of an intermediate rolling mill IM and the front of a finishing rolling mill FM by continuosly arranging the mills.
The method includes: a continuous rolling stage 1 where an unequal leg / unequal thickness rolled stock heated with a heating furnace RF is finally formed into an unequal leg / unequal thickness rolled stock having a nearly dog-leg-shaped cross section by making the continuous rolling of one roll, one way and one pass by the tandem arrangement of a roughing rolling mill IM, the intermediate rolling mill IM and the finishing rolling mill FM in tandem; a water cooling stage 2 where cooling is performed by jetting water to the surface and back face of the minor side A2 of the unequal leg / unequal thickness rolled stock; a bow delivering stage 3 where the unequal angle steel having unequal thickness A is delivered to the upside of the floor frame of the cooling bed CB so that the middle part in the longitudinal direction is expanded to the side of the minor side into a hack shape; a mist jetting and cooling stage 4 where the unequal angl steel having unequal thickness is further cooled by jetting the mist; and a roller straightening stage 5 where the roller straightening RS of the unequal angle steel having unequal thickness A is performed.
NAKANO YOSHIHARU
SHIMAMURA KIYOKAZU
KIKUTAKE OTOHIKO
NAKANO TAKESHI
KOBAYASHI DAIZO
MATSUKUBO MITSUO
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