Week: 3 Metal Fabrication

Week 3: Metal Fabrication

1. Q: What is CNC machining?
   A: Computer-controlled cutting to shape materials.

2. Q: What is the purpose of cutting oil?
   A: To reduce friction and heat during metal cutting.

3. Q: What is a vertical mill?
   A: A machine for precision metal cutting along three axes (X, Y, Z).

4. Q: What is a lathe used for?
   A: Rotating materials for machining circular parts.

5. Q: What is the difference between drilling and milling?
   A: Drilling creates holes; milling creates complex shapes.

6. Q: What are rivets?
   A: Fasteners used to join metal components.

7. Q: What is TIG welding?
   A: A precise welding method using tungsten electrodes.

8. Q: What is MIG welding?
   A: A faster welding process using a wire electrode and shielding gas.

9. Q: What are SMAW electrodes coated with?
   A: Flux, which protects the weld from oxidation.

10. Q: What is ultrasonic welding?
    A: A method that uses high-frequency sound to join plastics or metals.

11. Q: What is the purpose of shearing in sheet metal?
    A: To cut straight edges.

12. Q: What is laser cutting best for?
    A: Precision cuts in thin materials.

13. Q: What is a toolpath?
    A: A programmed route for CNC machine tools.

14. Q: Why are grommets used?
    A: To reinforce holes in fabric or metal.

15. Q: What is open-cell foam?
    A: Foam with interconnected pores, used for cushioning.

16. Q: What are Pem fasteners?
    A: Durable inserts used to join metal sheets.

17. Q: What is the purpose of annealing metal?
    A: To soften it for easier machining.

18. Q: What is springback in metal bending?
    A: The tendency of metal to return slightly to its original shape after bending.

19. Q: What are burrs in machining?
    A: Sharp edges left after cutting.

20. Q: Why is TIG welding slower than MIG welding?
    A: It requires more manual precision.

21. Q: What is a stress-strain curve?
    A: A graph showing how a material deforms under load.

22. Q: What does the ultimate tensile strength indicate?
    A: The maximum stress a material can withstand before breaking.

23. Q: What is a punch press used for?
    A: Creating holes or shapes in metal.

24. Q: Why is heat treatment used in metal fabrication?
    A: To improve hardness or ductility.

25. Q: What is the function of a drill press?
    A: To create precise vertical holes.

26. Q: What is the role of flux in welding?
    A: To protect the weld area from contamination.

27. Q: What are die tools in machining?
    A: Shaped cutting tools for forming parts.

28. Q: What is the function of end mills?
    A: Cutting, shaping, and finishing edges during milling.

29. Q: What are weld beads?
    A: The seam created by welding two materials.

30. Q: What is the purpose of tapping in metal fabrication?
    A: To create internal threads in holes.