面向精度分析的全语义产品模型研究  

Research on full semantic product model oriented to precision analysis

作　　者：王恒[1] 宁汝新[1] 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081

出　　处：《计算机集成制造系统》2005年第7期921-926,共6页Computer Integrated Manufacturing Systems

基　　金：总装预先研究项目(41318.1.1);国家自然科学基金资助项目(50475162)。~~

摘　　要：为了利用计算机技术辅助产品的精度设计,提出了计算机辅助精度分析的概念,阐述了其分类、内容和方法,并建立了一种面向狭义计算机辅助精度分析的3维产品模型———全语义产品模型。按照产品层次的不同,将该模型分为零件级和装配级两类,因而在构造不同类型的模型时需要附加不同层面的信息,并将这些信息转化为相应的邻接矩阵形式,存储在产品的相应模型文件中,这样,全语义产品模型弥补了基于特征设计的几何模型的缺陷,能够提供精度要求、尺寸公差、形位公差、表面粗糙度和装配约束关系等方面精度分析所需的信息,为实现计算机辅助精度分析提供基础模型。该模型已成功用于自主开发的计算机辅助精度分析系统中。The definition, classification, content and method of Computer Aided Precision Analysis (CAPA) were put forward to take computer technology into precision design works. Facing narrow sensed CAPA, the 3D Full Semantic Product Model (FSPM) was constructed. According to the product's different hierarchies, FSPM was classified as part level and assembly level, therefore different information should be defined for each kind of FSPM in model construction. And this information was transformed into relevant adjacent matrixes and stored into their corresponding model files. Compared with geometrical model based on features design, the FSPM could provide the information in compute aided precision analysis, such as precision demand, dimension and geometrical tolerance, surface roughness and assembly constraints. As the result, the FSPM could provide the basic model for CAPA and was successfully applied in the development of computer aided precision analysis system.

关 键 词：全语义产品模型 计算机辅助精度分析 计算机辅助公差设计 

分 类 号：TG8[金属学及工艺—公差测量技术] TP391[自动化与计算机技术—计算机应用技术]