[China Aluminum Network] Because it is a very complicated and difficult job to design a structurally reasonable, economical and practical extrusion die, the extrusion workers around the world have a theory and method for die design (especially for optimization theory and Method) A lot of research work has been done.
At the beginning of the development of extrusion technology, mold design was generally based on mechanical design principles using traditional strength theory combined with the designer's practical experience. With the development of elasto-plastic theory and extrusion theory, many new experimental theories and methods, computational theories and methods have begun to be used in the field of extrusion die design and fabrication. For example, engineering calculation method, metal flow coordinate grid method, photoelastic light-plastic method, dense grid pattern method, slip line method, upper limit element theory, and finite element theory are widely used in the determination of mold strain field and various The strength of the check, and then optimize the structure and process elements. With the development of computer technology, the CAD/CAM technology of extrusion die has been rapidly developed in the near 2030, and a large part of the technology is focused on the optimization of die design. He Delin et al.[3] developed a CAD/CAM system that can optimize the planar die and the splitter die using the IDEF0 method; Wang Mengjun et al.[4] used AUTOCAD120 as the graphics support environment and VISUAL BASIC4.0 as the development tool to develop the CAD. The system can effectively perform various calculations of the extrusion die, thus optimizing the design results; Yan Hong et al. [5] introduced the CAE concept into the die design process and pointed out the direction of optimization design; Liu Hanwu et al. [6] The concept of intelligent CAD was proposed to provide some ideas for the intelligent design of molds. In addition, researchers at home and abroad have used theoretical analysis, physical simulation and numerical simulation to analyze and test the deformation process, distribution and change of stress field and temperature field, friction and lubrication of aluminum extrusions. According to its research results, the extrusion die was optimized. For example, Zhao Yunlu and Liu Jingan [7] systematically discussed the optimization design of various extrusion dies. Some domestic researchers have used the finite element method combined with experimental methods to analyze and optimize the profile and mold structure of the extrusion die.
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