Calculation of Cylindrical Shells Bending Edges Power Parameters

Abstract

Mills with three rolls for bending sheets are widely used in the manufacture of large diameter welded pipes, tanks and other long cylindrical products. Flat edges remain on the product after bending. The edges bending to the curvature product radius can be done with longitudinal rolling on special machines. F methodology for calculating process power parameters must exists for these machines designing. For the design of these machines is proposed a method of the power process parameters calculating based on a model of the bending dies in non-contact with the influence of the deformation zone during sheet rolling. As a result, simple analytical dependencies for the vertical force engineering calculation, the rolling moment and the non-contact deformation zone were obtained. The possibility verification of their application showed good convergence of the calculated and experimental data.