基于轻量化模型的CAD/CAPP系统集成技术研究  

Integration Technology of CAD/CAPP Systems based on Lightweight Model

作　　者：田富君[1] 田锡天[1] 李洲洋[1] 耿俊浩[1] 

机构地区：[1]西北工业大学现代设计与集成制造技术教育部重点实验室,陕西西安710072

出　　处：《计算机集成制造系统》2010年第3期521-526,共6页Computer Integrated Manufacturing Systems

基　　金：国家863计划资助项目(2007AA040503)~~

摘　　要：针对当前计算机辅助设计、计算机辅助工艺设计系统间三维模型信息的集成和共享问题,提出了一种基于轻量化三维模型的信息集成方法。建立了基于轻量化模型的工艺信息模型。提出了基于轻量化模型的制造特征提取方法,通过设计轻量化模型几何信息提取和判断相邻表面间邻接关系的算法,建立了轻量化模型的边界表示(B-rep)模型,然后将边界表示模型与预先定义的形状特征模板进行比较,从而识别出零件的制造特征。最后通过一个实例验证了制造特征提取方法的可行性和有效性。To solve the integration and sharing problems of three-dimensional（3D） model between CAD and CAPP systems,a 3D product model information integration method based on lightweight model was proposed.A process information model based on lightweight model was established.A manufacturing feature extraction method based on lightweight model was presented.First,the boundary representation（B-rep） of the lightweight model was set up by designing the algorithm of extracting geometrical information from lightweight model and the method of judging adjacency relationship between adjacency surfaces,and then the boundary representation was compared with predefined form feature template in order to realize automatic recognition of manufacturing feature.Finally,a sample application was developed to illustrate the feasibility and validity of the proposed feature extraction method.

关 键 词：计算机辅助工艺设计 制造特征 工艺信息模型 轻量化模型 特征识别 

分 类 号：TH166[机械工程—机械制造及自动化] TP391[自动化与计算机技术—计算机应用技术]