1995 Volume 35 Issue 9 Pages 1089-1093
The calculation method of loads on the new beam rolling mill "Skew Roll Mill (SKM)" is proposed in order to select adequate rolling conditions for the web expansion of H-beams by SKM. Firstly, the equation of the mean compression stress in the direction perpendicular to the roll axes during the thickness reduction at both ends of the web is introduced by both the equilibrium equation of lateral stresses in the plane strain state and yield criterion. Secondly, an experimental equation of the boundary stress at both the rolling start point and tha rolling end point is established from plasticine-model and hot-rolling-model experiments. Moreover, an equation of the mean roll pressure is given by combining the equation of the mean compression stress with the experimental equation of the boundary stress. As a result, equations of the radial force are introduced by use of the mean roll pressure. Then equations of the thrust force depending on the radial force, the strain stress and shear stresses are introduced. The rolling torque can be calculated by use of the radial force and the thrust force. Calculated reuslts by this model in various rolling conditions have agreed well with hot-rolling-model experimental data.