Case-based reasoning design method for extrusion casting process parameters

Abstract

The invention provides a case-based reasoning design method for extrusion casting process parameters, and belongs to the field of casting process parameter design. The method comprises the following steps: according to the characteristics of extrusion casting process data, regarding the collected process data as a case, and performing problem identification and knowledge representation on a case library of the extrusion casting process data; determining influence factors according to the to-be-designed process parameters, constructing an uncertainty network structure between the process influence factors and the process parameters, completing reduction of the process influence factors, and optimizing weights according to a Markov blanket structure between the process parameters and the process influence factors in order to remove redundant attributes; and based on the similarity between the cases, storing the predicted process parameter values and the process influence factors thereof in a case library as new cases. The design of the extrusion casting process parameters is completed by directly utilizing the existing data, the application value is good, the design efficiency is high, and the design time can be greatly saved.

Description

technical field [0001] The invention relates to the field of casting process parameter design, in particular to a case reasoning design method for squeeze casting process parameters. Background technique [0002] Squeeze casting is a near-net-shape manufacturing technology that combines the advantages of forging and casting. It can produce parts with high surface finish and good mechanical properties. It has been successfully applied to the preparation of high-performance product parts and composite materials. It has very good development potential. [0003] Squeeze casting process parameters are the key factors of extrusion casting molding quality, mainly including pouring temperature, extrusion pressure, holding time and mold preheating temperature, etc., which have an important impact on the structure and performance of extrusion castings. Many scholars at home and abroad have carried out a lot of research on the influence of different squeeze casting process parameters ...

AI Technical Summary

Problems solved by technology

Although the fourth method can directly calculate the process parameters, because the mechanism of squeeze casting is not fully understood at present, the whole process cannot be fully quantitatively described. Only a small amount of empirical formulas are used to calculate parameters such as extrusion pressure, and the formulas are complex and accurate. Sex is not high

Case reasoning has been widely used in parameter design in welding, machining, electronic design and other fields, but there are few reports on squeeze casting

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