Numerical simulation of sand casting forming process

By using CAE technology flow, as long as the sand casting pattern, mold material, thermal physical parameters, solidification characteristics and mathematical model of sand casting alloy are input into the computer, the corresponding numerical simulation technology can be used to carry out screen test pouring on the designed process, simulate the solidification process of sand casting, predict the solidification defects, microstructure and residual stress, and then use the advanced image technology to make a realistic three-dimensional image display of the test pouring results, Comprehensively evaluate the defect position and degree, and then propose measures for a new round of process design optimization, screen trial casting and process verification.

An important development trend of advanced production technology is that process design moves from empirical judgment to quantitative analysis. Computer numerical simulation is an important method and approach to achieve this goal, and an important symbol to make the process research of sand casting industry move from qualitative to quantitative and from experience to science. At present, the research and development directions of sand casting forming processing technology in the world are as follows: first, the key sand casting technology of super large sand casting in major projects; Second, precise sand casting technology; The third is computer simulation to gradually replace the traditional empirical research methods. By using computer simulation technology, the trial production cycle can be shortened by 40%, the production cost can be reduced by 30% and the material utilization rate can be increased by 25%. The in-depth research on the computer numerical simulation of the sand casting process will provide basic data and theoretical basis for the optimization design of the casting process. Through the computer simulation of the sand casting process, the defects of the sand casting under various parameters are analyzed to determine the process parameters, optimize the process plan, and finally achieve the goal of high quality, high efficiency, low consumption and clean, which will certainly produce considerable economic and social benefits.

The research contents and methods are applicable, which provide a reference for further research of related contents, and also have important practical significance and practical value for practical production and application.