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Roll pass design of work rolls is the important component of production technology for section rolling. It defines technical-economical 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 shape-changing 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 value of correcting coefficient, the analytical dependence based on multiple regression analysis was elaborated. The correcting coefficients 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.
Improvement in mathematical model of steel forming by rolling of sections on the base of experimental and theoretical evaluation of spread
Additional title:
Weiterentwicklung eines mathematischen Modells der Verformung des Stahles beim Walzen von Profilen auf der Grundlage einer experimentellen und theoretischen Beurteilung der Breitung
Titel russisch