Analyzing The Metal Moving And Designing The Mould In The Continuous Extrusion Extended Figuration

Continuous extrusion extending forming technics has much excellence as big extending scale, high productivity, strong energy-saving, ascendant quality and good molding ratio and so on, especially adapts to the products with big dimension, high intensity and extra requirement of length. By comparision with using traditional technics, the copper generatrix produced by introducing this technics possesses enough advantage.The process of producing the copper generatrix by using continuous extrusion technics is very complicated, and the material capability, mould figure, technics parameters and temperature etc all affect the figuration process. If the technics parametrers and structure size of moulds are selected inadequately, a lot of disfigurement on curling, cracking and lacking material of the products will appear frequently, and the moulds will be spoiled easily. Therefore, this paper strives to analyze the moving rule of metal through numerical simulation, which can forecast the disfigurement existing in the extrusion process. So we can adjust technics parameters, amend the technics designment in time, and put forward to amelioration projects deeply.In this dissertation, we use DEFORM software as the tool to simulate and analyze, and establish the finite element analysis model of deformation process, which is based on rigid plastic/rigid viscoplastic FEM theory. This paper is made of five parts:1. Combining continuous extrusion technology with extending figuration technies characteristic, expatiate the necessity, feasibility and superiority of using FEM simulation to analyze and conpute the copper generatrix continuous extrusion extending efoumation process.2. According to plastic distortion characteristic of the copper generatrix, the rigid plastic/rigid viscoplastic FEM theory is used to simulate the complicated deformation process, and builds logical theory model, selects feasible evaluttion method, which tries hard to approach the simulation truth.3. Analyze the relation between strength and energy of continuous extrusion process. Deduce the calculate formula of deformation force, ascertain the value of machine torque when steady working.4. In order to get the simulation result matching with the real process, the key technique of the FEM simulation is researched to administer to constantly developand perfect the simulation system.5. The numerical simulation results of deformation process is analyzed detailedly, and velocity distribution, temperature distribution, effective stress and strain distribution and load-time of the metal deformation are received, which opended out the flowing distortion rule of metal. Furthermore, the mould designing was directed and optimized with the simulation results, while improving the figuration process of continuous extrusion.In conclusion, according to analyzing the simulation result, the technics parameters and die structure size should be selected reasonably, which can realize the copper generatrix continuous extrusion extending forming, and try our best to advance the productivity and save energy to a higher level.