Simulation and optimization of extrusion process of cylindrical work-pieces prepared from plasticized charge mixtures of powder and composite materials in strew presses

Abstract

The article describes a mathematical model of calculating the extrusion process of long powder compacts and composite materials with the help of screw presses through the facilities having local sectional area reduction of the forming channel. The stress field calculation in the various materi- al deformation centers along the overall length of the channel is carried out with the use of the discrete theory of plasticity. It is shown how, varying the form of channel surface, material extrusion rate in the zone of local channel section reduction and the compact section area, to select their com- bination being optimum for extrusion process.