Patent ID: 6041637
Filing Date: 2000-03-28
Classification: B21B

Abstract:
A roll replacing method for a chockless rolling mill, in which bearings for supporting the ends of work rolls are supported at an eccentric position of rotary bushes provided on housings, and the rotary bushes are turned to set a roll gap, comprising:moving the chockless rolling mill from a rolling line onto a pullout track extending in a direction perpendicular to the rolling line;fixing a housing on a drive side onto the pullout track at a predetermined position, moving a support trestle in a direction perpendicular to the pullout track, and fitting the support trestle between the pullout track and an upper work roll and a lower work roll to support the upper and lower work rolls on the support trestle;separating, from the housing in a drive side, a housing on a work side and the support trestle, supporting the upper and lower work rolls, separating the housing on a work side from the support trestle, and moving the housing on a work side and the support trestle, supporting the work rolls onto the pullout track until they come to a halt; andmoving the support trestle and the upper and lower work rolls, as a unit, onto a roll replacement track, which is provided in a direction perpendicular to the pullout track, to replace at least one of the upper and lower work rolls, as a unit, by spare upper and lower work rolls, as a unit, and the support trestle and the upper and lower work rolls, as a unit, by a spare support trestle and spare upper and lower work rolls, as a unit.