The Research And Application Of 3D Digital Modeling Technology Based On Knowledge

The 21st century is an age of knowledge economy. Facing the corning of new economy the corporation should respond to the market rapidly and be able to quickly produce the products involving rich knowledge, so it can gain survival in the market environment with so intense competition, while the knowledge is the important resource that can keep enterprise sustainable development and competency advantage. Knowledge-based Engineering is a new agent designing method and automatic tool developed under the requirement of modern design, and it has become the important approach of promoting engineering design intelligentize.For driving the manufacturing informationlization, 863 plan the MIS technique topic has set up the subject of digital designing and manufacturing system. In the course of digital designing and manufacturing, first is to realize the digital modeling of product and engineering, while 3D is the core of whole MIS for it becoming the product information's data headstream, thus the research on 3D digitization modeling technology has the actual engineering significance.The major content of this paper is summed as follow:1. 3D digital modeling technology is investigated which uses the theory of parametrization, analyses the typical parts studies several key technology such as: accurately sculpting method , digital modeling technique etc. and bases for the conversion from 3D to 2D and integrating of CAD/CAPP/CAM.2. The theory of KBE is investigated. Through acquiring designer's knowledge it is integrated with 3D digitization modeling technique, so automatically modeling and recycling knowledge for the textile machine parts in common use such as gear, etc is realized.3. The key technology of secondary development in Pro/E is investigated, which adopting the idea of object oriented, utilizing its development tool-Pro/Toolkit, VC++ advanced programming language and SQL Server database realized the integrating of DLL with Pro/E, and developed a friendly user interface.etc.4. Utilizing above technology and theory, the 3D model database and design knowledge database is founded, and the FJCAD applied system is developed. The system has been installed in the TianJin HongDa Textile Mechanism Limited Company, and gained favorable effects since 7th, 2003. It also acquired highly evaluation of TianJin Municipal Science and Technology Commission.