The Abstraction Of Product Data Information Based On STEP Neutral Files

In this paper, the author studies the abstraction of product data information based on STEP neutral files. The data information of 3-D product is extracted from the STEP neutral file according to the semantic model of STEP/AP203 schema. The data is handled by using data mining principle and topology way searching methord. Using Java 3D API , the 3-D product model is rebuilded. The main content as following:l)The present development progress of CAD/CAPP/CAM is reviewed. The purpose, significance, content and technology of this article are discussed.2) According to the development, current status and main content of the STEP standard, the author studies the structure, format, topological relation of the instance, realizing methord and geometry information element of the STEP neutral file. And taking STEP files created in UG environment for instance.3) Taking general design of the system. According to the principle of dataexchange in STEP neutral files, the system is devided into two parts-STEPneutral files parser and figure rebuild part. And the general flow process chart is designed.4) Using data mining technique, the author designs the reading data part, building topology relation graph part and creating medium file part. The programming language is Java.5) Using Java 3D API technology, the author designs figure generating module to rebuild 3D figure of production. This module involves three parts: interface setting part, attribute information abstracting part and figure showing part.6) Conclusions and researching directions of the future are summarized.The main function of this system is to rebuild the basic 3-D geometrical fingures in an environment without CAX systems by using Java, Java 3D API and technology of Internet Explorer.