Processes Flashcards
1
Q
How would you make an internal thread?
A
- centre punch a hole
- drill into the house
- countersink (optional)
- tap goes into tap wrench
- twist clockwise into hole 3 times and anticlockwise 1/2
2
Q
How do you make an external thread?
A
- put die into stock
- champher the rod with a flat file
- put champhered rod into die stock
- rotate 3 times then go back 1/2
3
Q
What is a champher?
A
The angled blade of a chisel
4
Q
What are the positives of injection moulding?
A
- great precision
- high repeatability
- fast
- low cost
5
Q
What are the negatives of injection moulding?
A
- high start up cost
6
Q
What plastics can you use for injection moulding?
A
- thermoplastics
7
Q
How would you fold acrylic into place?
A
Linebending
8
Q
What are the benifits of using CAD?
A
- reduces human error
- improves accuracy
- allows clearer communication and visualisation
- allows offsite management
