Asee peer logo

3 D Modeling/Gd&T Cornerstones For Manufacturing Education

Download Paper |

Conference

2002 Annual Conference

Location

Montreal, Canada

Publication Date

June 16, 2002

Start Date

June 16, 2002

End Date

June 19, 2002

ISSN

2153-5965

Conference Session

Computers in Manufacturing Education

Page Count

6

Page Numbers

7.8.1 - 7.8.6

Permanent URL

https://peer.asee.org/11156

Download Count

81

Request a correction

Paper Authors

author page

Alan Leduc

Download Paper |

Abstract
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Main Menu Session 3263

3-D Modeling/GD&T – Cornerstones for Manufacturing Education

Alan M. Leduc Ball State University Department of Industry & Technology Muncie, Indiana aleduc@bsu.edu

Abstract

Three-dimensional (3D) modeling allows graphics to be taught as the virtual manufacturing of a part. Modeling of parts begins with a primitive – raw material. The primitive is then modified using features such as slots, pockets, holes, etc. – manufacturing methods. By using 3D modeling, students can be taught about both engineering graphics and manufacturing simultaneously; and thus have a better understanding of how to design parts for manufacturability.

Geometric dimensioning and tolerancing (GD&T) encourages a dimensioning philosophy that defines a part based on how it functions in the final product. GD&T should be taught not merely as a set of symbols that are applied to a two-dimensional drawing, but rather as a functional requirement of the design, manufacture, and measurement of the part. While teaching GD&T the instructor should also incorporate fundamental concepts of metrology, which will provide students with a better understand of the “symbolic language” of GD&T and its affect on the manufacturing and inspection processes. GD&T and three-dimensional modeling both depend heavily on the use of datum planes and axes. By requiring students to be consistent in the application of datum planes/axes and location dimensions, the instructor emphasizes the importance of capturing design intent (manufacturing intent) in the model thus further enhancing the students understanding of the impact of design on manufacturing.

This paper discusses the importance of three dimensional-modeling and geometric dimensioning as they relate to manufacturing and outlines a two-semester course sequence for presenting this material in a Manufacturing Engineering Technology curriculum.

A Need to Follow the Change in Communication Models

A survey by Clark and Scale of North Carolina State University1 on current trends in technical graphics revealed that 54% of the respondents still teach manual drafting and that 92% of the respondents still teach two-dimensional (2D) CAD. The survey also revealed that only 54% of the respondents offered 3D constraint based modeling and that only 66% the respondents use some geometric dimensioning and tolerancing. It is not within the scope of this paper to address the pros and cons of continuing to teach manual drafting and 2D CAD. However, it seems clear that many programs have failed to keep up with the rapid technological changes in the technical

“Proceedings of the 2002 American Society for Engineering Education Annual Conference & Exposition Copyright Ó 2002, American Society for Engineering Education”

Main Menu

Leduc, A. (2002, June), 3 D Modeling/Gd&T Cornerstones For Manufacturing Education Paper presented at 2002 Annual Conference, Montreal, Canada. https://peer.asee.org/11156

ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2002 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015