The parameters were selected and the analysis of their compliance to assess the processing complexity of castings was made. A variant of the organization of process design for the castings of varying difficulty, defined on a set of proposed geometrical parameters was proposed.
The results of research, computer simulation of the influence of the shape of the grain of sand on the formation of the strength of the core mixture are presented. An essential dependence of the strength of the core on the quality characteristics of the refractory filler is established.
The method of optimizing the design of gating-feeding systems on the basis of the automated classification algorithm of technological complexity of the casting is presented.
The mechanism and causes of the formation of casting defects, manifested in the deviation of the geometry of the internal cavities from the «cylindrical», are investigated. It is shown that the causes of distortion of the geometric shape are associated with deformation of the casting rod during thermal and mechanical interaction with the melt. Using the possibilities of computer simulation in the MAGMASOFT package, the temperature distributions of the metal in the casting body during the casting and solidification were analyzed. Areas of distortion of the geometric shape of the inner part of the casting correspond to the area of the rod subjected to the highest and longest thermal loads. The characteristics of the temperature fields in the respective zones indicate overheating of individual areas of the rod to temperatures causing phase stresses in the structure of the core mixture, sufficient for the occurrence of deformations in it. To eliminate the defect under consideration, two approaches were used to reduce the magnitude of phase stresses in the casting rod and to adjust the design of the rod tooling.
The methodical application of neural network modeling in preparation and optimization of casting technology is described. A new technique for classifying castings based on geometric relationships of the geometry of parts and information on the distribution of wall thickness in castings.
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