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Forming a Strong Association Between Dimensional Data in Sketches and Engineering Drawings

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2020 ASEE Virtual Annual Conference Content Access


Virtual On line

Publication Date

June 22, 2020

Start Date

June 22, 2020

End Date

June 26, 2021

Conference Session

Engineering Design Graphics Division Technical Session 5

Tagged Division

Engineering Design Graphics

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Paper Authors


Oziel Rios University of Texas at 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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Two-Dimensional (2D) computer-based sketches are fundamental to generate 3D models in many of the Computer-Aided Design (CAD) software applications implemented in engineering graphics and design courses. Furthermore, engineering drawings rely on these 3D models to document and communicate designs. Although much of the dimensional data included in engineering drawings comes from the model’s sketches, students sometimes struggle forming a connection between these resulting in drawings that are either under-dimensioned or over-dimensioned. In this evidence-based practice paper, an instructional method to teach the interaction between sketch curves, constraints, and dimensions is presented with the goal of creating engineering drawings with suitable dimensional data. Exercises that have been developed and refined are presented to illustrate the method and convey best-practice approaches in the classroom. Examples of student work is presented to illustrate the common mistakes made. The method presented is independent of the CAD software and can be taught in first-year graphics courses or even upper-level design courses.

Rios, O. (2020, June), Forming a Strong Association Between Dimensional Data in Sketches and Engineering Drawings Paper presented at 2020 ASEE Virtual Annual Conference Content Access, Virtual On line . 10.18260/1-2--34681

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