MANUFACTURE INVESTIGATION OF CARTRIDGE WITH BOTTOM-MOST PART FLANGE BY DIRECT EXTRUSION WITH COUNTERPUNCH. REPORT 15. CALCULATION METHODOLOGY OF PROCESS VARIABLES OF STRAITENED EXTRUSION PROCESS

The calculation methodology of the energy-power and strain parameters of a straitened extrusion process of cartridges with a counterpunch is presented. The extrusion of both non-hardening and hardening material is discussed. Taking into account of the strengthening of extruded material is described in detail for a case of hardening material. The presented formulae allow one to determine such most important parameters of the pressing process as total and specific strain forces, maximum pressure on a die wall, an increase in yield load.