平鋼の熱間圧延における幅広がりの測定と予測式の提案

概要

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The widthspread behavior in flat rolling is an old but still important problem to be clarified, because it is one of basical problems in general caliber rolling, and is more important for caliberless rolling technique. Several geometrical parameters have been investigated about how they affect the widthspread behavior in actual hot rolling experiments. They are rolling reduction, ratio of thickness to roll radius and ratio of width to thickness. From an energetical point of view, a simple calculation system of the mean widthspread is proposed and evaluated by using the experimental results, which strongly support the calculating system; in the range of 0.64-3.6 of width/thickness, and 0.18 to 0.50 of thickness/roll radius. The side barreling behavior is expressed with 4-th power polynominal very well in wide range rolling conditions, and the mathematical expression with rolling parameters mentioned above are obtained in the same range as for the mean widthspread behavior. For the range of high value of thickness/roll radius, greater than 0.86, however, succesful expression is not obtained, although in this range the side barreling behavior can be still well expressed with 4-th power polynominal function of the coordinate in thickness direction.
1983-12-01