车身模拟装配中动态干涉检查方法的研究

Interference checking is closely related to product R&D design and production quality. In the design process of assembly or 3D model, there will inevitably be interference, static interference, or interference in assembly path, especially the latter, The inspection process is cumbersome and inefficient. Therefore, in order to assist engineering designers to quickly find out the interference of products in the assembly path, a dynamic assembly inspection method based on CATIA/CAA secondary development is proposed. Firstly, introducing the technology of CATIA secondary development, expounding the theory, studying the method and the realization principle of interference checking. Secondly, Selecting the method of making mechanical device, with better visualization degree, by comparing the advantages and disadvantages of the two poses of the pose matrix and the mechanical device command. Then, Obtaining the bounding box of the part in the global coordinate system, and performing the intersection test, judging the interference initially, recording the interference part information, and checking interference accurately by API provided by CATIA/CAA. Finally, the validity and feasibility of the dynamic interference detection of the proposed method in the simulation assembly process are verified by an example.