The evolution of digital fabrication technologies has reshaped engineering education, and 3D printing, also known as Additive Manufacturing (AM), has emerged as a vital tool for enhancing conceptual understanding and design skills. Traditionally, Engineering Drawing courses have focused on two-dimensional sketching and orthographic projections, often limiting students’ ability to mentally visualize and construct complex geometries. This study aims to explore the pedagogical impact of integrating 3D printing into an undergraduate Engineering Drawing curriculum, with the objective of bridging theoretical design with tangible creation. A mixed-method approach was employed at a technical university, involving 120 second-year mechanical engineering students divided into control (non-3D printing) and experimental (3D printing integrated) groups. The experimental group received additional training in CAD modeling and used Fused Deposition Modeling (FDM) printers to fabricate their designs. Pre- and post-assessments were conducted to evaluate spatial reasoning, technical drawing accuracy, and design comprehension. In addition, surveys and focus groups captured student perceptions. Results showed a 28% improvement in spatial visualization scores and a 34% increase in drawing accuracy for the experimental group. Students reported enhanced understanding of part geometry, tolerancing, and fit, alongside increased motivation and engagement. The ability to physically prototype designs encouraged iterative thinking and real-world problem-solving, which are often difficult to cultivate through conventional methods alone. This case study concludes that embedding emerging 3D printing technologies into Engineering Drawing not only enhances traditional learning outcomes but also prepares students for modern industry demands. The iterative design opportunities offered by 3D printing deepen comprehension of engineering principles.

Authors:
Mohammed Algarni, King Abdulaziz University, Saudi Arabia

About the Presenter(s)
Prof. Mohammed Algarni serves as the Chairman of the Mechanical Engineering Department and the Vice-Dean of Graduate Studies and Scientific Research at the College of Engineering, King Abdulaziz University, Rabigh Campus, Saudi Arabia

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