| 摘要 |
The present invention provides a manufacturing apparatus and a manufacturing method of a hot-rolled steel sheet by which a rolled material can be cooled uniformly and the surface properties of the rolled material can be improved. The manufacturing apparatus of a hot-rolled steel sheet comprises: a rolling stand; a supplying device capable of supplying a lubricant to work rolls and/or backup rolls; an online roll grinding device; and a removing device capable of removing at least a part of the lubricant before the surface of the work rolls is ground by the grinding device. The manufacturing method of a hot-rolled steel sheet comprises, in rolling a plurality of materials to be rolled by using the manufacturing apparatus, the steps of: removing at least a part of the lubricant adhered to the work rolls, or to the work rolls and the backup rolls by using the lubricant removing device after completing rolling of a preceding material to be rolled; grinding the work rolls by using the online roll grinding device after the removing step; and supplying the lubricant to the work rolls and/or the backup rolls from the lubricant supplying device . |
