Lecture Notes: Designing a Hairbrush in Fusion 360

Introduction

• Video tutorial on designing a hairbrush in Fusion 360
• Key steps include base creation, curve design, and spike creation

Base Creation

1. Start New Workspace:
   • Select top or bottom plane
2. Create Ellipse:
   • Major diameter: 110 mm
   • Minor diameter: 55 mm
3. Draw Two Circles on Line:
   • Outer circle: 26 mm diameter
   • Inner circle: 9 mm diameter
4. Join Lines:
   • Line dimension: 200 mm
   • Add taper line and tangent constraint
5. Mirror Line Across Center Line
6. Finish Sketch and Extrude:
   • Extrude as new component, distance: 10 mm

Red Curve and Dome Creation

1. Create Secondary Ellipse:
   • Major diameter: 95 mm
   • Minor diameter: 45 mm
2. Extrude Cut:
   • Depth: -1 mm
3. Offset Plane and Create Sketch:
   • Offset: 12 mm
   • Create point on line for reference
4. Create Loft for Dome Structure:
   • Select profile and point, change to tangent constraint
5. Fillet Creation:
   • Fillet: 0.5 mm

Spike Creation

1. Create Offset and Extra Ellipses:
   • Offset: -3 mm
   • Create additional ellipses (total of 4) with specified dimensions
2. Project Ellipses onto Dome Surface
3. Create Sketch for Spikes:
   • Draw lines, set dimensions and angles for spikes
   • Use two-point circle for base of spikes
4. Revolve Spike Profiles:
   • Join with main body
5. Pattern on Path for Spike Duplication:
   • Use circular pattern technique for duplication

Final Adjustments

1. Add Fillets to Spikes and Base:
   • Create an 8 mm fillet
   • Additional 3 mm fillet for specific points
2. Final Appearance Adjustments:
   • Manual selection for knob appearance

Conclusion

• Completion of hairbrush design
• Reminder to share and subscribe to the channel

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These notes summarize the steps and techniques used in the Fusion 360 tutorial for creating a hairbrush with spikes. The process includes creating the base, designing the dome, and patterning the spikes, with attention to specific dimensions and constraints.