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The designed product construction information structural and semantic representation in the CAD-system

Keywords:

D.E. Tsygankov – Post-graduate Student, Department «Applied Mathematics and Informatics»,
Ulyanovsk State Technical University
E-mail: d.tsyg@mail.ru
A.F. Pokhilko – Ph. D. (Eng.), Associate Professor, Professor, Department «Applied Mathematics and Informatics», Ulyanovsk State Technical University
E-mail: afp@ulstu.ru


The CAE/CAD/CAM-system line constant evolution ensures the geometric 3D-models stable position in the life cycle of the product, primarily at the stage of development and research. Due to this, 3D-models are designed product representation both in its manufac-turing processes – in modeling in CAM-systems, the functioning principles, which provided by the functionality of CAE-systems, and directly the construction formed in CAD-systems. Obviously, for the design phase, the most important design information is the product construction, which displayed by the modern CAD-systems with by geometric digital 3D-model.
The 3D-model informativeness consists in providing the designed data required for the current stage of the product life cycle. The designed product construction display is the main functional of the CAD-systems. In this case, the designed product construction in-formation displayed by the 3D-model is contained directly in the basic operations that make up its structure – the 3D-model creation tree. Consequently, the 3D-model informativeness increase reduced to the laying of design information to the basic operations. This achieved through the visualization of the 3D-model creation tree structure the designed product functional structure. Used as the 3D-models formation traditional approaches, in general, do not put the main purpose of the structural correspondence between the basic operations and structural elements of the product that is the cause of «abstract» creation tree in the CAD-system.
The CAD system basic operations generalization to the level of the semantic macrofunction – the unit corresponding to the designed product structural element in terms of its functional structure, provides two key advantages:
1. Fixing and displaying of the designed product structure information, relevant in its subject area;
2. 3D-model creation process simplicity, providing the convenience of further modification.
The designed product 3D-model informative value increase provides detailed information about its functional structure within the framework of the CAD-system functionality, allows to move from operating with abstract terms to the professional language of its domain.

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