| 摘要 |
PURPOSE:To improve remarkably the degree of freedom of the transverse size of a rolling material and to improve productivity by using the material which is subjected to edge grinding and is to be rolled and subjecting such material to cold rolling while shifting work rolls in the transverse direction of the material to be rolled thereby preventing the formation of the flaws of edge marks. CONSTITUTION:The angle parts 1a of the material 1 to be rolled are chamfered by edge grinding and thereafter the material is fed to a rolling state. The edge grinding is executed by cutting tools or grinding wheels at the four angle parts and may be executed at only the two points where there are the burrs formed by a trimmer. The material to be rolled is thereafter subjected to the cold rolling while the work rolls are shifted in the transverse direction thereof. Since the material to be rolled is chamfered by the edge grinding, the flaws of the edge marks are not formed on the work rolls even if the material to be rolled is hard. The free selection of the transverse size of the material to be rolled thereafter is thus made possible and the productivity is improved.
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