Magnitogorsk State Technical University, Magnitogorsk, Russia:

Kalugina O. B., Sr. lecturer of “Information technology” dept., kalugina.olga@bk.ru

Kinzin D. I., Ass. Prof. of “Metal forming” dept., Cand. Eng.

Moller A. B., Dr. Eng., Prof.

Roll pass design of work rolls id the important component of production technology for section rolling, it defines technicaleconomical and qualitative parameters of rolling process. The authors compared calculated values of elongation coefficient with its experimental data in rolling on flat rolls of 250, 370 and 450 rolling mills of magnitogorsk Integrated Metallurgical Works. The analysis of shapechanging parameters basing on the least resistance principle formulation has been done. The dependence between received calculation accuracy and deformation area shape has been revealed. In order to extend the applying area of form-shaping calculation methodology, the correcting coefficient has been suggested. In order to determine the correcting coefficient’s value, the analytical dependence based on multiple regression analysis was elaborated. The correcting coefficient’s introduction has allowed to decrease the average calculation error of elongation coefficient in section rolling on flat rolls and on calibers from 4.5% to 2%. The maximum calculation error doesn’t exceed 3%. As a result, the more exact taking into account of deformation hearth shape allows to extend the applying area of the metal shape-change determination methodology practically into full range of rolled products.

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