ROLL GRINDER

PURPOSE:To grind a roll which controls a precise plate profile without damaging grinding capacity by providing a local grinder head with a specific grinding width, a head with a larger grinding width and a controlling part to give a grinding pattern independent of each head. CONSTITUTION:After a wide area grinder 10 grinds an unworn part B on the driving side of a work roll 14, it grinds an unworn part B2 on the rolling side. At the same time, a local grinder head 12 having a >= 50mm grinding width performs local corrective grinding of a tapered part C at a cutting rate and a cutting amount determined so that the roll profile forming the present abrasion is corrected to the initial roll profile to control the plate profile. In this way, as an unworn part is ground efficiently by a wide area grinder head 10, the roll profile of the work roll 14 can be formed precisely by the local grinder head 12 for the special purpose of plate profile control.