Abstract
The mathematical method is proposed for determining the forces and bending moments at preliminary cold flattening of the thick steel sheet on the seven-roller sheet-straightening machine. The calculations allow us to determine the support reaction of working rollers, residual stresses in the wall of steel sheet, the proportion of plastic deformation on the sheet thickness and the relative deformation of the longitudinal surface fibers of the sheet under straightening depending on the rollers’ radius. It is also possible to establish the pitch between the straightening machines’ working rollers, the magnitude of sheet reduction by the upper rollers, the sheet thickness, as well as elastic modulus, yield stress and hardening modulus of the sheet metal. The results of the research can be used at metallurgical plants.
Highlights
Distribution of linear pressure of thin-sheet rolling across strip width // Journal of Chemical Technology and Metallurgy. 2016
The mathematical method is proposed for determining the forces and bending moments at preliminary cold flattening of the thick steel sheet on the seven-roller sheet-straightening machine
The results of the research can be used at metallurgical plants
Summary
Пусть Mi – изгибающие моменты стального листа в точках касания рабочих роликов с листом: M1 = 0, M2 = M(ρ2 ), M3 = –M(ρ3 ), M4 = M(ρ4 ), M5 = –M(ρ5 ), M6 = M(ρ6 ), M7 = 0. Изгибающие моменты листа в точках касания листа с роликами при E = 2·1011 Па, R = 125 мм, σт = 5·108 Па, h = 10 мм, t = 270 мм, ρ1 = –1 м, H2 = 12 мм, H4 = 6 мм и H6 = 1 мм показаны на рис. 1.
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