Abstract
Light alloy materials are widely used in aerospace, automobile, shipbuilding and chemical industry, and the service life of aircraft, automobile and high-speed train is directly related to the thread connection performance of light alloy. The surface quality, dimensional accuracy, material utilization and mechanical properties of cold extruded internal threads are superior to those of traditional processing methods. The influence of processing conditions on the surface microstructure and mechanical properties of internal thread is described. In this paper, the development direction of the finite element simulation technique for metal plastic processing and the design of new extrusion tap structure and the optimization of extrusion process parameters are proposed
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