基于异构CAD平台的可参数化Web三维模型库构建

构建网络三维模型库的目的在于实现对大量零部件三维CAD模型资源的规范化组织和高效集中管理。基于异构CAD平台构建了可参数化Web三维模型库系统架构,并对基于OSG的三维模型网络可视化、基于异构CAD系统的三维模型参数化驱动设计及二次开发接口统一封装、三维CAD模型及参数加密等关键技术进行了讨论;给出了原型系统及其在复杂产品——节能抽油机快速虚拟样机设计过程中的应用实例。结果表明:开发的基于异构CAD平台的可参数化Web三维模型库不仅能满足不同CAD用户需求,且支持在线三维模型浏览和参数化驱动设计,提高了产品开发效率。

Construction of Web Based and Parameterized Three Dimensional CAD Model Library on Heterogeneous CAD Platforms

The purpose of 3D model library construction was to realize standardization organization and efficient , centralized man-agement of mass 3D CAD models resource of components and parts .Based on heterogeneous CAD platforms , the system architecture for web-based and parameterized 3D CAD model library was built .And three key technologies were discussed , including OSG-based 3D model network visualization , 3D model parametric drive design , unified encapsulation of secondary development interfaces , and the encryption of 3D CAD model and its parameters .A prototype system was developed and its application process was given for complex product ( e.g.energy saving pumping unit ) rapid virtual prototype design .The results show that the developed Web-based and parame-terized 3D CAD model library on heterogeneous CAD platforms can not only meet the demand of different CAD user , but also support online browsing and parametric drive design of 3D model parametric 3D model driven design , and improve the efficiency of product de-velopment .