The Theory Of New CAD Model And Its Application Research Based On ACIS

As the development of computer integration of advanced manufacture and model design, the product info is required to be more general and exact in order to support more phases of product-lifecycle. But there are only basic info of geometry, topology and partial kinematics in the CAD model in STEP. The description on feature of multi-rigid-body dynamics is hardly blank. Model is the carrier of info, and the design model of integrated info is the core of model CAD technology. Moreover, to a perfect CAD model, description about kinematics and dynamics exactly and fully is especially important. Based on this idea, a new CAD model having feature of kinematics and dynamics is puted forward and studied accordingly. Further, the realization and application of the model is discussed in ACIS geometric modeling engine supported by American Spatial Technology Inc.ACIS provides a number of function library and abundant functionality of 3-D geometry modeling. The structure, resource, and functionality of ACIS is summarized and HDCAD application system is developed based on them. The system is developed through AMFC that is the interface of ACIS and Visual C++ 6.0. This system is developed according to the thought of software engineering entirely, so it have clearly module, friendly interface between person and computer and integrated function. Therefore, lately developers can append and improve the system according to the module. Now, the HDCAD system can realize simple entity modeling and complex modeling of sweep and blend. Moreover, author embeds the features of kinematics and dynamics into the sat file of the model createdly by the way of user-defined attribute. So the model is enriched with kinematics and dynamics besides geometry and topology. The resource of experiment system of the new CAD model possesses innovation and practical sense.This thesis researches on the theory and application of the new CAD model having kinematics and dynamics feature, which also indicates its great development potential and widely application future.