W2-Aluminum Extrusion Cross-section
This week's assignment is to sketch an aluminum extrusion crosssection with Fusion 360, then extrude from the sketch. Here is the technical drawing I found online. I think the zigzag edges on each pointy corner of those arrow shapes are going to be challenging.
Firstly, I imported the technical drawing into Procreate on my iPad to sketch on top of it. I marked all the measurements I might need and drew out basic shapes like squares and circles, so I know what forms I need to sketch on Fusion 360.
I started from the center with a circle and squares and worked my way out.
For the four diagonal arms connecting the four arrow shapes with the center square, I know they are 2cm thick and assumed 45 degrees. I drew two long squares with a 2cm height and rotated them 45 degrees. Then I turned the edges into the construction lines to draw solid lines on top of them.
As for those zigzag lines, I used a similar method, creating rectangle boxes and then turning them into construction lines. I drew two boxes in each direction and then drew lines over them.
After checking all the lines and shapes were accurate, I started rounding corners. One problem I encountered was when two corners share the same line, the rest of the line would disappear when I rounded one of the corners. I discovered the Trim tool that could break up a line, so rounding corners would only affect a segment of the edge.
I also noticed that, when I zoomed into each rounded corner, there were segments of broken line hanging from edges. I think there were multiple overlapping lines when I drew those shapes, and I only rounded one of them, so the rest of the line on the same spot was left out. Just my guess, I would love to know what caused those. I also used Trim to get rid of those lines.
Here is the final finished sketch before extrusion.
