A Modeling and Representation Method for Virtual Assembly System

Abstract

To transform CAD model into virtual assembly model, model transformation was divided into two processes, namely part model transformation and assembly constraint model transformation. With secondary development of SolidWorks system, both part model and assembly constraint model were extracted form SolidWorks model. The OpenFlight database, which is a standard format for virtual reality simulation, was used to represent the hierarchical model of part. Assembly constraint model was expressed by object-oriented hierarchical model in text file. These two models were associated with each other using unique name or number. By loading part files and assembly constraint file, the assembly model was reconstructed in virtual assembly system. The experiment verified that the presented method was effective.

Geometry Modeling for Virtual Reality Based on CAD Data

“…5). This study followed procedures such as program initialization, establishing head nodes of database, establishing group nodes, object nodes and face nodes, setting up node attributes, binding the hierarchical relationship among nodes, and saving and closing database to achieve the save and read-in of models [13]. …”