A new STEP-based Product information Model and Its Implementation Approach

• Autores: Fuqing Zhao, Dongmei YU, Yahong Yang
• Localización: International journal of the computer, the internet and management, ISSN 0858-7027, Vol. 15, Nº. 1 (ENE - ABR), 2007, págs. 15-24
• Idioma: inglés
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• Resumen

  • Product data exchange and interfacing between different CAD/CAM systems are of great importance to the development of concurrent integrated design. In this paper, an integrated STEP-based production information model for mechanical systems is presented. First ,an architecture of this system is established using a three-layer architecture (application, logic and physical layers)recommended by STEP, and a new information model using database implementation approach is defined using STEP's EXPRESS language, this model include GIM(General Information Model), SIM(Structure Information Model), SCM(Shape Construction Model), PFM(Physical Feature Model), MIM （Management Information Model）. Then, the database implementation method to information model is analyzed thoroughly, which include how to build data dictionary, how to transfer EXPRESS entity to base table in relational database and how to access product data in database. The information model and its application can make heterogeneous CAD system integrate more convenient.