Lesson 1: Engineering Design with CAD
Duration of Days: 5
Lesson Objective
SWBAT:
Create a 2D constraint-based sketch in CAD software with accurate dimensions.
Utilize "Extrude" and "Revolve" features to transform 2D sketches into 3D solid models
How does digital prototyping reduce material waste and cost in vehicle engineering?
Why is "Parametric Modeling" (where dimensions are linked) superior to simple digital drawing?
CAD, Parametric, Constraint, Extrusion, Revolve, Sketch, Plane, Origin, Fillet, Chamfer
CT-CTE.MFG.G.43 (Demonstrate the use of CAD in manufacturing) CT-CTE.EDP.A.03 (Develop a digital 3D model).
DOK Level: 2 (Skill/Concept) & 3 (Strategic Thinking)
Students transition from sketches to 3D Computer-Aided Design (CAD). The purpose is to create precise digital models of vehicle components (like a custom motor mount or steering hub) that can be analyzed before fabrication.
Misconception: "CAD is just a drawing tool like MS Paint."
Correction: CAD is a mathematical database where lines have specific lengths and relationships (constraints) that define physical reality.
Support: Provide "Step-by-Step" video tutorials for the first simple part (e.g., a basic spacer).
Extension: Have students perform a "Mass Properties" check to determine the weight of their part in aluminum vs. steel.
The Digital Component: Completion of a 3D model of a standard Electrathon bolt-pattern plate that matches a provided technical drawing.