The specifics of information inheritance in CAD/CAM-integration

The article describes the specifics of information inheritance when transferring data from CAD system to CAM system: the object-oriented nature of the transmitted data and the influence of PLM contexts on data semantics. The object-oriented approach implies in the information transfer processes the presence of “parents” and “descendants” and associative relations between them, which makes it possible to reuse engineering projects. UML representation clearly describes the various schemes of information inheritance in the CAD/CAM-integration. These schemes must be taken into account when implementing end-to-end engineering projects. The PLM context is considered as the semantic field of the product life cycle stage, which affects the interpretation of engineering data. Digital space of an enterprise consists of informational contexts which affect the values of the transmitted data. Ignoring this circumstance leads to the loss or distortion of the actual values of the inherited parameters. The article provides a definition of the PLM context as an ontology of the product life cycle stage, which acts as the external environment in relation to integrated applications. A preliminary version of the ontology of the technological domain has been developed. It is proposed to store information about the stages of the product life cycle directly inside the 3D model of the product in the ontological representation of knowledge based on the XML standard. The specifics of information inheritance are considered on the example of integration of the CAM-system developed by the author of the article with its basic CAD-platform KOMPAS-3D. A strategy for automating the influence of PLM contexts on the values of the transmitted data is proposed.