| 摘要 |
PROBLEM TO BE SOLVED: To roll a rolled stock having excellent surface quality even when rolling rolls are ground at the final stand of a continuous hot-rolling mill array or a temper rolling mill in a method and device for on-line grinding rolling rolls. SOLUTION: In the rolling mill, each of rolling mill rolls 1a is provided with a grinding unit 5 having a plane type or a cup type rotary grinding wheel 20, then the rolling rolls are on-line ground. The rotary grinding wheel 20 of the grinding unit 5 has a thin-plat disk 52 and an annular abrasive grain layer 51 which is fixed to the side face of the thin-plate disk 52 and made by hardening the abrasive grains of cubic boron nitride or diamond using a resin bond for a binder. The size of the abrasive grain in the abrasive grain layer 51 is either No.170/200 or No.200/230. Furthermore, the width (the width of the grinding wheel) W in the radial direction of the annular abrasive grain layer 51 is taken as 30-50 mm. This grinding unit is installed on the final stand of the continuous hot-rolling mill train or the temper rolling mill.
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