| 摘要 |
<p>PURPOSE:To prolong the service life of roll and to improve productivity by shifting reversely in the axial direction the upper and lower work rolls of a rolling mill used for repeated rolling and controlling the wearing shape of a work roll and the sheet crown of a rolling material. CONSTITUTION:In case of rolling a rolling material 34 repeatedly by a rolling mill 31 equipped with work rolls 32, 33 made shiftable in their axial directions, and rolling again the material 34 reduced in thickness by rolling; the upper and lower work rolls 32, 33 are shifted in the directions reverse to the arrows (a), (b) directions to bring the roll ends close to the side ends of rolling material 34 respectively, and are shifted to respective positions where a prescribed sheet crown is obtained by controlling the distance delta. By said shifting, the wears of rolls 32, 33 are dispersed and averaged, and the rolling of various sheet widths can be performed without changing the rolls, and the productivity is improved by continuing the rolling under constant high rolling reduction.</p> |
