On-line roll grinding method and apparatus as well as rolling mill using the same

(19)

(11)

EP 1 201 357 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	17.12.2003 Bulletin 2003/51

(43)	Date of publication A2:
	02.05.2002 Bulletin 2002/18

(21)	Application number: 01118859.6

(22)	Date of filing: 14.08.2001

(51)	International Patent Classification (IPC)⁷: B24B 5/16

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

31.10.2000 JP 2000337245

(71)	Applicant: Hitachi, Ltd.
	Chiyoda-ku, Tokyo 101-8010 (JP)

(72)	Inventor:
	Mori, Shigeru, Hitachi, Ltd., Int. Prop. Gp. Chiyoda-ku, Tokyo 100-8220 (JP)

(74)	Representative: Beetz & Partner Patentanwälte
	Steinsdorfstrasse 10 80538 München 80538 München (DE)

(54)	On-line roll grinding method and apparatus as well as rolling mill using the same

(57) An on-line roll grinding apparatus which includes a grinding unit (5) having a rotatable rotary grindstone (20) for on-line grinding a rolling roll (1a) and a roughness adjusting unit (7) capable of adjusting A surface roughness of the rolling roll (1a), and which can adjust the surface roughness of the rolling roll (1a) in AN on-line roll grinding.

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