Analysis And Experimental Study On The Cartridge Extrusion

Take the extrusion of a cartridge as the research object, the numerical simulation of forming process and working condition of die are studied in this paper. The technology of the extruded part has been stipulated, and the failure analysis has been studied. Those are in favor of increasing the part and the service life of die.Firstly, the geometric model of die and rigid-plastic finite element model of simulation are built according to the demand of simulation analysis. The definition of interface condition between die and workpiece, the adding of material parameters, forming velocity of machine and mesh, is also done. It is the base of the following computer simulation.Through numerical simulation of finite element method (FEM), the course of extrusion of the cartridge is simulated. The forming of the deformation rate and friction are discussed which impact equivalent strain, equivalent stress and extrusion force. The analysis showed that it is beneficial to forming when the extrusion is 10mm/s.Based on the result of the FEM simulation, the extruded forming technology of the cartridge has been stipulated, and the physical experiment is achieved. The result shows that it is feasible to produce cartridge with this extrusion technology.Through quantity production, the transition location of extruded die of the cartridge fractured. It resulted in the ineffectiveness of die. The stress and temperature field of die in the extrusion processes is analyzed using simulation software of finite element method. The main reason of ineffectiveness of die is found, and the improving project is put forward, effectively improved the life of the mold.