The Design And Development Of System On Temperature-Field /Stress-Field Simulation And Technology Optimization Design For Castings

The numerical simulation of casting solidification process is one of important methods and ways by which the casting quality and the economic benefits of foundry production can be raised. The main task of the thesis is that, depending on the finite element analysis software, or ANSYS, for the developing platform, the temperature field and stress field numerical simulation of casting solidification software, which is oriented to foundry engineers, will be preliminarily developed by systematically combining the knowledge of foundry, numerical simulation of casting solidification and application and development of computer. Based on the system, the efficiency of analysis will be improved, and the defect prediction and the optimization design of foundry technology will also be carried out.The three-floor hierarchy architecture of system development is adopted in the system. Primarily aiming at sand casting process, the system on temperature-field! stress-field simulation and technology optimization design for castings, in which cast iron, steel, alumirnun and copper which are most often used in the foundry industry are the major analysis materials, has been preliminarily designed and developed by applying the technologies and methods of software modularization, parametric design, hierarchy and reticulate data structure, database, internal developing tools of ANSYS (APDL and UIDL) and external developing tools (Visual C++ and Access). In addition, the guiding design method based on knowledge base of casting alloysand foundry technology design is also adopted.According to the characteristics of foundry technology and the numerical simulation of casting solidification process, the system is divided into four sub-systems: foundry technology CAD, the temperature-field numerical simulation of casting solidification process, the stress-field numerical simulation of casting solidification process, and the defect prediction and optimization design of foundry technology. Every sub-system and module is either independent or relevant one another in function, and the information integration is also basically realized.The system that includes the main numerical simulation contents of casting solidification process has the better integrality and systematization. Foundry engineers-oriented developing thought and systematical input of a great deal of foundry knowledge make it very convenient for foundry technicians to use and operate, and also demonstrate the outstanding characteristics of specialization, practicability, and customization. Furthermore, these characteristics have also been tested by actual design and analysis process.