TADANATSUENKINOROORUSETSUTOATSUPUHOHO

摘要

PURPOSE:To improve the quality, yield and productivity by enabling the execution of the roll setup for obtaining the target plate thickness with high accuracy without using the plate width of a rolling plate and the elastic deformation of a rolling mill. CONSTITUTION:The relation of the rolling reduction cylinder position in the state of a pair of upper and lower work rolls being abutted each other and the load pressure of the rolling reduction cylinder is found and the cross point of the respective extension line of the state transition line lo at no load time and the state transition mo at load time is taken as Po. The cross point P of the extension line of the state transition line (m) at load time and the state transition line (l) at no load time i then overlapped on the Po at the biting stopping time of the rolling material at rolling start time of each pass. And the difference DELTAS in the rolling reduction cylinder position S on the line m' at the time when the load pressure of the rolling reduction cylinder is the same and the rolling reduction cylinder position So on the line mo is corresponding to the deformation of the rolling material. The target plate thickness is obtainable by the line (m) at the time when the difference DELTAS becomes equivalent to the movement of the rolling reduction or under the load pressure of the rolling reduction cylinder corresponding to the rolling reduction cylinder position S on the m' and the position S.