Design And Experiment Research Of Hot Extrusion Simulating Mould

Magnesium and its alloy are the lightest structural material in engineering application by far. They own good performances that can't be substituted by aluminum and steel, such as high specific strength and specific rigidity, high elastic modular ratio, high damping of vibration, good machining property, high thermal conductivity and electrostatic shielding property. Moreover, they are easy to recycle, which is good for environment. So nowadays they have been widely applied in the industries of aviation, automobile, computer, communication and house electric appliance. At present, most of the magnesium alloys are produced by the way of casting. Compared with casting technology, the structure of magnesium alloy is refined after thermal deformation. The casting deficiency will be eliminated and combined mechanical property will be improved greatly, exhibiting higher strength and ductility, more mechanical properties than casting magnesium alloy, so it is hopeful to become a new structural material with high performance in this century. Wrought magnesium alloy is manufactured through the process of extrusion, rolling and forging. Due to a lack of special experimental setting for the study of magnesium alloy's extrusion, the extrusion technology and its optimization must be carried out on large-scale extrusion machine in the workplace.The purpose of this paper is to design experimental equipment for simulating the extrusion of magnesium alloy. It introduces the method of simulating extrusion, which is using the simulating experiment to replace the industry produce experiment, controlled by computer programme. This method simulates the change of heat and strength during the heat process of magnesium alloy, finding out the extrusion force that being needed during extrusion process and the rule of flow property affected by the temperature and deforming rate, and optimizing the technical parameters during this experiment. It provides exact processing parameters for industry production to optimize programme and the results are exact, low cost and convenient and agility to use. This paper records the process of design, improving, mechanical processing and assembling of extrusion punch, extrusion tube, extrusion die and seat in detail; introduces the function of every parts and working process of mould comprehensive. Then, through debugging experiment and thermometric analysis, circuit analysis is carried out. The main problem existing in the process of heating extrusion...