Mitsubishi Heavy Industries Limited

Primetals Technologies Japan, Ltd.

Toru Takeguchi

Akira Sako

Hideaki Furumoto

Shinya Kanemori

Tadashi Hiura

Jiro Hasai

Taroh Satoh

Hideki Tonaka

Masashi Yoshikawa

Syuji Maniwa

Shoozoo Tashiro

There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

Rolling mill and rolling mill adjustment method

Rolling apparatus and a rolling method

A roll replacing method and a roll replacing system for a chockless rolling mill, in which bearings for supporting the ends of work rolls are supported at an eccentric position of rotary bushes on housings, and the rotary bushes are turned to set a roll gap, includes, pulling out the chockless rolling mill from a rolling line onto a pullout track extending perpendicularly to the rolling line; fixing the housing on a drive side onto the pullout track at a nearest position, moving a support trestle perpendicularly to the pullout track, and fitting the support trestle between the pullout track and the upper and lower work rolls to support these work rolls on the support trestle; separating the housing on a work side, the trestle, and the upper and lower work rolls, as a unit, from each other and from the drive-side housing, and moving them onto the pullout track until they come to a halt; and moving the trestle and the upper and lower work rolls as a unit onto a roll replacement track perpendicular to the pullout track, to replace the upper and lower work rolls as a unit by spare upper and lower work rolls as a unit, or to replace the trestle and the upper and lower work rolls, as a unit, by a spare trestle and spare upper and lower work rolls as a unit.

Roll replacing method and system for chockless rolling mill

Growing community of inventors

Hiroshima, Japan

Toru Takeguchi