Design for Manufacturability
Why do FRC teams design holes and slots around standard drill and end-mill sizes (e.g., 0.125", 0.196" for #10 clearance, 0.25")?
It avoids costs and delays of buying new parts/tools
What is the standard diameter of our CNC router bit?
4mm
What are the 3 sizes of box tubing we use?
1x1, 1x2, 2x2
What is the 3D 3/4 view of a part called?
Isometric
Should yogurt be chewed
no.
When choosing tolerances for a part you plan to machine, what is the best general rule?
choose loosest tolerance that still lets the part function
True or false: more custom holes require more fabrication time
true
True or False: use COTS corner brackets when possible
true
What are 5 things you should include in a drawing?
Different views, dimensions of holes, x/y origin, dimensions where you should take away material, part name
What is Annika's boyfriend's name?
Bill (the Drill Mill)
When is a tapped hole generally the preferred design choice?
No room/hard to reach wrench for a nut, swaps need to happen quickly
Name 5 end-mill sizes we have
3/16, 1/4, 3/8, 1/2, 5/8, 3/4, 1, 1.125, 1.5
What thickness of sheet metal do we have in-lab?
0.08, 1/16, 1/8, 3/16, 1/4
Standard view in drawings where an object is sliced open to reveal internal features/hole depth
Section view
What Broadway musical do we listen to the most in build season?
Hamilton!
When designing something, you should always make sure you can reach these standard hardware items with a tool after surrounding parts assembled
1in diameter
What 2 things can hold a part down while doing the CNC profile path
Tabs or screws
This type of dimension (which dimensions a row of features beginning at a chosen origin) should be used when making part drawings
Ordinate dimensions
Who is the reigning Mechanical arm-wrestling champion?
Nora (?)
When designing custom 1/2 hex shafts, this machine operation is needed on the ends if you want them in standard bearings without binding
Turning down the ends
What size bolts do we use AND what head type do we prefer AND why?
10-32 bolts, prefer socket heads because they are less likely to strip unless clearance issues
What are birds, really?
government spy drones.
bonus question: which FRC team gives out pins with the phrase "birds aren't real"?