Learning Targets
- Apply fillets and chamfers appropriately.
- Explain why an edge treatment is used.
- Verify the complete part against the original documentation.
IED Unit 2 • Lesson 2.7
Fillets, Chamfers, and Design Intent — Bracket 3
Focus question: How do edge features improve the function, manufacturability, and appearance of an engineered part?
Your lesson guide
Objective
Apply fillets and chamfers appropriately. Explain why an edge treatment is used. Verify the complete part against the original documentation.
Materials
For the online work: a browser and your engineering notebook. Follow the activity’s materials list for any physical build, and get teacher approval before using equipment.
Plan your time
Suggested work block: 45–60 minutes. Physical builds and projects may span several classes; follow your teacher’s schedule.
Lesson Overview
What You Are Learning
How to Approach the Work
Use the instructor demonstration to understand the tool or design decision, then complete the assigned work independently and verify the result before submission.
LearnModelVerifyReviseSubmit
Reference Resources
Bracket 3 Reference Model and Sketch
Use the 3D model to understand the geometry and the three drawing PDFs as your main references while building the part.
Loading model…
Drag to rotate • Scroll or pinch to zoom
Overall dimensions: 3.000 × 2.000 × 1.250 in
Display
Standard Views
Viewer Controls
Important: Use the interactive viewer to interpret shape, orientation, and feature location. Use the downloaded Bracket 3 drawing views as the main drawing references for your CAD model.
Recommended workflow: Keep the Bracket 3 drawing PDFs open while modeling. Use the 3D viewer when you need help interpreting the part geometry, and use the drawing views as your primary 2D references.
Assignment
Fillets, Chamfers, and Design Intent — Bracket 3
You will complete Bracket 3 by adding edge treatments and then perform a final model verification. The goal is not just to make the part look finished; each feature should exist for a reason.
Step-by-Step Instructions
- Compare the current model with the technical drawing: Identify every remaining fillet, chamfer, radius, or finishing feature that is still missing.
- Add fillets: Select only the edges that should receive the specified radius. Confirm the correct radius value before accepting the feature.
- Add chamfers: Apply the required chamfer type and distance/angle. Verify that the chamfer removes material from the intended edge.
- Review feature order: Look at the Timeline and confirm the feature order is logical. If a feature fails when an earlier dimension changes, investigate whether the model references are robust.
- Perform a complete dimensional check: Measure the overall part and at least the critical holes, cutouts, and edge features. Compare the final model directly with your Unit 1 documentation.
- Clean the file: Remove unused sketches or accidental geometry only if they are truly unnecessary. Leave the model organized so another person can understand how it was built.
Before You Submit
- All required edge treatments are present.
- Final dimensions match the technical drawing.
- Timeline is readable and does not contain obvious accidental features.
- Bracket 3 is complete at the end of this lesson.
Submission
What You Will Submit
File requirements: Export the final editable model using File → Export → Fusion 360 Archive Files (*.f3d). Submit the archive and PNG evidence.
LockwoodSTEM Tutorial
Lesson Video
LockwoodSTEM Tutorial — IED 2.7
Use this instructor-recorded tutorial to review the Fusion skills demonstrated for this lesson. Pause, rewind, and follow along in your own Fusion file as needed.
Resources
Lesson Resources
IED Unit 2
Return to the Unit 2 lesson list and course sequence.
Introduction to Engineering Design
Return to the IED course hub for units, resources, certifications, and current course information.
Build your lesson report
Checkpoint: is your evidence ready?
- Check calculations, units, labels, and measurements against the activity requirements.
- Record what actually happened, including unexpected results.
- Explain what you changed and why; attach required drawings, photos, CAD, or code in your classroom assignment.
Final Fusion archive: completed Bracket 3 exported as LastName_FirstName_2_7_Bracket3_Final.f3d. Final model screenshot: isometric view with Browser and Timeline visible. Save as LastName_FirstName_2_7_Bracket3_Final.png. Written response: identify one fillet or chamfer and explain its design purpose.
A PDF download is not a submission. Review it, then upload it and any required attachments through your classroom assignment system.