The snaking prevention manner in high-temperature finish rolling, and production manner of the hot rolling metallic plate which uses that

摘要

PPROBLEM TO BE SOLVED: To provide a method of preventing the meandering of a material to be rolled in rolling with a finishing mill on a hot-rolling line and a method of manufacturing a hot-rolled metal sheet using the same and, preferably, to provide a method of reducing the number of devices to be installed when preventing the meandering of the material to be rolled in the rolling with the finishing mill on the hot-rolling line by installing a crop shape recognizing device, and a method of manufacturing the hot-rolled metal sheet using the same. PSOLUTION: The planar shape in an end part in the longitudinal direction of the material 8 to be rolled is measured (30, 31) on the inlet side of the finishing mill on the hot-rolling line and/or between rolling mills, a wedge ratio is obtained from the planar shape and the difference dS between roll openings on the work side and the drive side of a finish rolling stand is set to prevent the meandering. PCOPYRIGHT: (C)2010,JPO&INPIT