INTENSIFICATION OF THE PROCESS OF COLD CRIMPING TUBULAR BLANKS USING MATRICSES OF DIFFERENT PROFILES

Abstract

There’re considered ways to intensify the process of crimping tubular blanks by using the profiled matrices in this work. Results are compared of the traditional crimping in profiled and radiused matrices, and, in the latter case, crimping is carried out both with a cylindrical workpiece or pre-crimped to the cone blank workpiece. Matrix made of profiled consistently angled torus surfaces, which reduces the contact area with the workpiece’s material. There’re obtained the distribution of the degree of using resource of plasticity, the intensities of the stresses and strains at the bottom of deformed workpieces for each type of crimp in this work. The dependence of crimping’s efforts of punch’s moving is obtained there. There’re shown that using the matrix with profiled surface leads to an increase maximum rate of crimping by theoretical analyze, using the finite element method, on example of the crimping stainless steel tubular workpiece