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Teaching Geometric Dimensioning and Tolerancing Concepts Using 3-D Computer Models and 3-D Printed Parts

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2018 ASEE Annual Conference & Exposition


Salt Lake City, Utah

Publication Date

June 23, 2018

Start Date

June 23, 2018

End Date

July 27, 2018

Conference Session

Mechanical Engineering Division Technical Session 2

Tagged Division

Mechanical Engineering

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Paper Authors


Oziel Rios University of Texas, Dallas

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Dr. Oziel Rios earned his Ph.D. in mechanical engineering from the University of Texas at Austin in 2008 where his research focused on design of robotic systems with an emphasis on kinematic and dynamic modeling for analysis and control. Dr. Rios teaches the first-year and CAD courses in the Mechanical Engineering Department at the University of Texas at Dallas. Dr. Rios has also taught kinematics and dynamics of machines and graduate-level CAD courses. Dr. Rios’ research and teaching interests include: robotics, design, kinematics and dynamics of machines and engineering education.

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Geometric Dimensioning and Tolerancing (GD&T) is an important tool for engineers to efficiently communicate design intent and requirements. GD&T has several advantages including reducing costs by decreasing waste, producing components that are interchangeable, and allows designers to more clearly communicate functional relationships between features in drawings. However, GD&T can be difficult for students to learn due to the visualization skills needed to comprehend the inherent three-dimensional (3D) nature of the geometric tolerance zones. This paper describes an example of how 3D computer models and 3D printed parts made by Fused-Deposition Modeling (FDM) were used to illustrate several GD&T concepts including position tolerance zones, bonus tolerances, datum simulators and priority, and functional gages for part inspection. Since 3D printing technology is becoming more accessible for educators, the method used in this paper can be easily modified, expanded and implemented to teach not only the aforementioned concepts but other GD&T concepts that can be difficult to comprehend. The resources required to implement the example are a computer equipped with Computer-Aided Design (CAD) software and a 3D printer.

Rios, O. (2018, June), Teaching Geometric Dimensioning and Tolerancing Concepts Using 3-D Computer Models and 3-D Printed Parts Paper presented at 2018 ASEE Annual Conference & Exposition , Salt Lake City, Utah. 10.18260/1-2--31053

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