Representing dimensions, tolerances, and features in MCAE systems

Author

Gossard, D.C. ; Zuffante, R.P. ; Sakurai, H.

Author_Institution

Dept. of Mech. Eng., MIT, Cambridge, MA, USA

Volume

8

Issue

2

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

51

Lastpage

59

Abstract

A method is presented for explicitly representing dimensions, tolerances, and geometric features in solid models. The method combines CSG and boundary representations in a graph structure called an object graph. Dimensions are represented by a relative position operator. The method can automatically translate changes in dimensional values into corresponding changes in geometry and topology. The representation provides an important foundation for higher-level application programs to automate tolerance analysis and synthesis. The implementation of a prototype interactive polyhedral modeler based on this representation is presented.<>

Keywords

CAD; CAD/CAM; computational geometry; data structures; engineering graphics; mechanical engineering computing; CSG; MCAE systems; boundary representations; computational geometry; constructive solid geometry; engineering graphics; geometric features; graph structure; interactive polyhedral modeler; mechanical CAE; object graph; relative position operator; solid modelling; solid models; tolerance analysis; topology; Application software; Computational geometry; Computer graphics; Manufacturing; Product development; Prototypes; Solid modeling; Tolerance analysis; Topology; Abdomen, Acute; Adult; Appendectomy; Appendicitis; Female; Humans; Laparoscopy; Length of Stay; Male; Outcome Assessment (Health Care); Postoperative Complications; Registries; Severity of Illness Index; United States;

fLanguage

English

Journal_Title

Computer Graphics and Applications, IEEE

Publisher

ieee

ISSN

0272-1716

Type

jour

DOI

10.1109/38.503

Filename

503