A SCHEME TO REPRESENT FEATURES, DIMENSIONS, AND TOLERANCES IN GEOMETRIC MODELING

被引：17

作者：

WANG, NX

OZSOY, TM

机构：

[1] Lehigh University, Bethlehem, PA

来源：

JOURNAL OF MANUFACTURING SYSTEMS | 1991年 / 10卷 / 03期

关键词：

CAD; DATA STRUCTURE; FEATURE DIMENSION; TOLERANCE;

D O I：

10.1016/0278-6125(91)90036-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents a scheme for representing features, dimensions, and tolerances in geometric models. The scheme combines a modified CSG tree with a face-edge based B-rep data structure to represent high-level form features and low-level primitive features. Dimensions and tolerances are treated as constraints. The dimensional relations within a machine part are described by constraining operators from which the position and orientation of form features are derived automatically. The modification of geometry can be achieved by directly changing dimensions. The representation promises a new engineering tool for design and manufacturing engineers and provides an important foundation for supporting engineering applications such as tolerance analysis and dimensioning checking. The scheme has been implemented in a prototype system.

引用

页码：233 / 240

页数：8

共 12 条

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