基于异构CAD平台的可参数化Web三维模型库构建

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

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。

The purpose of 3D model library construction was to realize standardization organization and efficient, centralized management 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 parameterized 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 development.