| 摘要 |
PURPOSE: To roll a high-gloss steel strip without meandering by making the angle of each of ground grooves formed between its extension direction and the circumferential direction of a work roll within a prescribed range and assem bling upper and lower work rolls so that the extension directions of their ground grooves are crossed with each other on the side of a material to be rolled. CONSTITUTION: Grinding for grooves is executed so that the angleΦformed between the extension direction of the surface roughness of the work roll and the circumferential direction of the work roll 2 is made within the range of tan<-1> (λa/L) to 5 deg., where the average pitch of surface roughness in the width direction of the steel strip 1 on the inlet side is expressed byλa and the contact arc length of roll bite of the work roll at the time of rolling by L. By assembling the work rolls so that the extension directions of respective surface roughness of the work rolls are crossed with each other on the side of the material to be rolled to execute rolling, the material to be rolled having excellent surface gloss is rolled without meandering. The recessed parts in a certain position on the surface of the steel strip 1 are successively squeezed with different projecting parts of the work roll 2 and rolling oil is not sealed in the recessed parts on the surface of the steel strip 1, so that the surface gloss is improved.
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