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Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK
Rechnerunterstützte Bereitstellung von Montageprozeßwissen für die Konstruktion
Fraunhofer-Gesellschaft
1992
,
Krüger, S.
,
Neu, S.
The paper presents a software tool that supports design for assembly in an early design stage. It integrates a 3D solid modeller, an expert system shell and an object-oriented data base, thus providing parallel knowledge-based support in DFA through a CAD-system. At first, the paper describes an integrated information model which serves as a basis for the system development. It is structured into data models for product, process, assembly equipment and order, which has been described using the STEP-EXPRESS language. The data models have been implemented in the expert system object base. Assembly process knowledge is represented within the knowledge base in form of frames, constraints and IF-THEN-rules. Subsequent to the description of the system's architecture four application examples which are concerned with the assembly of mobile telephones are presented. These examples are optimizing of drilling hole coordinates for automated assembly of printed circuit board and telephone housing, optimizing the groove profile for automated pressing-in of a flexible gasket, the selection of standardized endeffectors and the precalculation of assembly costs.