Dimension and tolerance modeling and transformations in feature based design and manufacturing

Citation
Jj. Shah et al., Dimension and tolerance modeling and transformations in feature based design and manufacturing, J INTELL M, 9(5), 1998, pp. 475-488
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering Management /General
Journal title
JOURNAL OF INTELLIGENT MANUFACTURING
ISSN journal
0956-5515 → ACNP
Volume
9
Issue
5
Year of publication
1998
Pages
475 - 488
Database
ISI
SICI code
0956-5515(199810)9:5<475:DATMAT>2.0.ZU;2-5
Abstract
This paper describes the development and application of a geometric dimensi on and tolerance (GD&T) model for use in both design and process planning. The model meets criteria for computability and compatibility with the Y14.5 M standard. The model is first used to capture the designers GD&T scheme on a feature based design model, validate its completeness, and then transfer the GD&T to machining features extracted automatically by feature recognit ion. The model is based on relative degrees of freedom of geometric entitie s: feature axes, edges, faces and features-of-size. Dimension graphs are cr eated based on the degrees of freedom for each control direction. Datum ref erence frames and standard tolerance classes are incorporated into the grap h. The model allows dimension specification, dimension scheme modification, and dimension scheme validation. A methodology to automatically determine the GD&T of machining volumes obtained by feature recognition is also descr ibed.