基于有向图的零件容差建模方法

• 论文 •

基于有向图的零件容差建模方法

张开富，杨海成，李原

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；2．中国航天科技集团公司，北京 100037

出版日期:2005-09-15 发布日期:2005-09-25

Tolerance modeling approach to part based on directed graph

ZHANG Kai-fu, YANG Hai-cheng, , LI Yuan

1. Key Lab. of Contemporary Design & Integrated Manufacturing Tech., Northwestern Polytechnical Univ., Xian 710072, China; 2. China Aerospace Sci. & Tech. Corp., Beijing 100037, China

Online:2005-09-15 Published:2005-09-25

摘要/Abstract

摘要： 为了实现用计算机表示零件几何形状和尺寸变动的基准、变动方向和变动量的要求，提出了一种基于有向图的容差建模方法。该方法采用一个五元组来表示容差元：定义零件的参考坐标系和零件中与几何形状和尺寸相关的关键特征；采用图的有向边描述关键特征之间的容差关系；采用单位向量表示容差变动方向，实现容差元的有向图表示；基于图的和运算实现了对所有容差元模型求和，从而构建了零件容差模型。最后，给出了实例验证，并开发了与CATIA集成的容差建模功能模块。

关键词: 关键特征, 容差元, 容差建模

Abstract: In order to represent benchmark, fluctuation trend and fluctuation value of geometric shape & dimension of component, a tolerance modeling approach based on directed graph was presented. A 5-tuple was used to represent meta-tolerance. The construction process of tolerance model was as following: firstly defining the reference frame and Key Features (KFs) related to geometric shape & dimension, then describing tolerance relationship between KFs by directed arc of graph and a unit-vector was utilized to represent fluctuation trend of tolerance. All meta-tolerance models were set up based on directed graph. Then the tolerance model was constructed based on sum operation about graph for all meta-tolerance models. And a tolerance modeling system integrating with CATIA V5 was developed. Finally, the approach was validated by an example.

Key words: key feature, meta-tolerance, tolerance modeling, directed graph

中图分类号:

TH16
TP391

张开富，杨海成,，李原. 基于有向图的零件容差建模方法[J]. .

ZHANG Kai-fu, YANG Hai-cheng, , LI Yuan. Tolerance modeling approach to part based on directed graph[J]. .

参考文献

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