A 3D Model Classification Method of Casting Combining d2 Operator and Normal Operator

Abstract

The invention belongs to the field of three-dimensional casting model classification, and specifically discloses a three-dimensional casting model classification method combining D2 operator and normal operator, comprising the following steps: triangulating three-dimensional casting models of various types; The operator and the normal operator obtain the D2 feature descriptor and N2 feature descriptor of the 3D model of the casting; then according to the initial category of the casting, the D2 and N2 category feature descriptors of various castings are obtained; finally, the similarity measurement function is used to calculate the The similarity between the three-dimensional model of the casting and the three-dimensional model of each category is classified, and the three-dimensional model of the casting is classified according to the similarity. The invention can identify the type of new castings based on the established database, improves the intelligence of casting process design, has a good feature recognition effect for common casting types, can effectively discriminate casting types, and solve the process of castings of the same type. reuse problem.

Description

technical field [0001] The invention belongs to the field of classification of three-dimensional models of castings, and more specifically relates to a method for classifying three-dimensional models of castings combined with a D2 operator and a normal operator. Background technique [0002] Intelligent production mode is the goal pursued by foundry enterprises. Among them, casting process design is a leading link, and it is of great significance to realize the intelligentization of foundry process design. [0003] At present, the product design mode of foundry enterprises is mostly experience-driven, and the quality of process design depends on the experience of designers; this kind of manual knowledge retrieval method has a low reuse rate for mature process plans of enterprises, resulting in low process design. effect. As 3D models are more and more widely used in casting production, the number and types of models are becoming more and more abundant, and the advantages of...

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Problems solved by technology

[0003] At present, the product design mode of foundry enterprises is mostly experience-driven, and the quality of process design depends on the experience of designers; this kind of manual knowledge retrieval method has a low reuse rate for mature process plans of enterprises, resulting in low process design. effect

As 3D models are more and more widely used in casting production, the number and types of models are becoming more and more abundant, and the advantages of model reuse technology in the process design process are becoming more and more obvious, and the enterprise database has a large number of design materials, historical processes , 3D casting models and other professional materials are a wealth of historical experience and achievements, but they have not been efficiently managed and reused

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