Thin-walled conical shell drawing from a plane blank

Abstract

We present a model of the nonstationary process of drawing a thin-walled conical shell from a plane blank, which is based on the membrane theory of plastic form change of a rigidplastic body with the contact friction, the thickness variation in the sense of von Mises, the material strengthening, and the die and the matrix radii of rounding taken into account. The computational model determines the thickness and strengthening distributions along the shell generator, the graph of technological force, and the process critical parameters at which the blank fracture may occur.