【摘要】 给出了实现异构CAD系统间零件库几何信息共享的一种新思路和有效途径 :分析主流通用三维CAD系统的共性 ,补充PLIB标准中零件几何信息模型的高层实体定义 ,进而考虑零件参数化信息和特征信息 ,建立基于特征的零件精确几何表达机制。在此基础上开发的接口实现了异构CAD系统间零件几何信息以及设计意图的共享。更多还原

【Abstract】 A new idea and approach is put forward to realiz e the sharing of geometric information of part library(PLIB) oriented to heterogen eous CAD systems. It is realized by analyzing the common features of predominant 3-dimensional CAD systems, and adding high level entity definitions. Furthermo re, considering the parametric information and feature information, a feature-b ased explicit geometric representation mechanism is presented. The developed int erface realizes the sharing of geometric information and design intention of par ts oriented to the heterogeneous CAD systems.更多还原