METHOD FOR IDENTIFYING THRUST REACTION FORCE ACTING POINT, AND ROLLING METHOD FOR ROLLED MATERIAL

摘要

A method for identifying a thrust reaction force acting point on a reinforcing roll in a rolling mill having four or more rolls, said method including: a step in which the friction coefficient between rolls and/or the cross angle between rolls is changed under the same tightening load, thereby causing a plurality of levels of thrust force to act on the different rolls, the thrust reaction force in the roll axial direction acting on each of the rolls forming at least one roll pair from among the rolls other than the reinforcing rolls is measured in the kiss roll state at the respective plurality of levels related to the thrust force, and the reinforcing roll reaction force acting in the reduction direction is measured for each reinforcing roll at a rolling support point position; and a step in which, on the basis of the measured thrust reaction force acting on each roll and using a first equilibrium condition formula related to the force acting on each roll and a second equilibrium condition formula related to the moment, the thrust reaction force acting point of the thrust reaction force acting on the reinforcing rolls is identified.