Week 2 - Journal

To design the glasses frame I did the following steps:

• I opened Fusion 360 and saved the file. 

• Then I started sketch, and chose the top plane to work on. 

• Then using the create drop down menu, I drew 2 circles with diameter 25mm (which turned out later to be too small!) and offset each circle 2mm wider. 

• Then I created a smaller circle with diameter 11mm with distance of 8mm from each of the two otherr circles,  each on a side, then offset it 2mm narrower. 

• I drew a line and defined it in accordance to the origin to trim with the shape.

• Using the trim tool from the Modify drop down menu, I trimmed all the extras above the shape. 

• Then, from the create drop down menu, I drew a rectangle and using the dimension tool I placed it exactly above the trimmed semi circles of the glasses. 

• I rounded the corners of the rectangle with the fillet tool from the Modify drop down menu, with radius 0.60mm. 

• Follwing that, I created a circle with radius 1.50mm and placed its center 1mm away from the edge of the rectangle. This creates the the M3 screw hole. 

• I re-drew the same screw hole on the other side of the glasses. (A smarter way to do it is to use Move/Copy tool from the Modify menu, try it out instead!)

• Now the 2D sketch is ready! To have a 2.5D sketch I extruded the sketch with distance 3mm using the extrude tool from the Solid tab. 

• After I selected Finish Sketch, I exported the file as dxf for laser cutting from the embedded extension in Fusion 360, found at the Create menu.

The pictures below give glimpses of the process in pictures. Note that the frame turned too little. and. I had to scale it up on LaserWorks, without changing the radius of the M3 holes. Refer to the challanges for more. on that!

To design the glasses arms I did the following steps:

• In the same fusion file as the frame and on the same top plane, I hid the frame and started modeling the arms.

• Then using the create drop down menu, I drew a rectangle 110mm width and 5mm height. 

• Then I drew a circle with diameter 60mm and placed its top quadrant on the right end of the rectangle. 

• Then I created a smaller circle with diameter 20mm and placed it inside the first circle but closer to the right end, as shown in pictures below.

• Using the trim tool from the Modify drop down menu, I trimmed all the extras. 

• I filleted the right down corner of the shape with 4mm, using the fillet tool from the Modify dropdown menu. 

• Now the 2D sketch is ready! To have a 2.5D sketch I seleected Finish Sketch and extruded the sketch with distance 3mm using the extrude tool from the Solid tab. 

• Then also on the Solid tab, from the Modify dropdown menu I used the fillet tool to round the arms' sharp edges.

• To make room for the screw, I clicked on create sketch and selected the left end of the arm to be the plane. This is where the arms comes together with the frame. 

• I drew a square from the Create dropdown menu, then drew the circle inside which creates the M3 screw hole. and negatively extruded the shape into the arm, using the extrude tool from the Modify dopdown menu under the Solid tab. 

• Finally, I exported the file as .stl. 

The pictures below give glimpses of the process in pictures.