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Instructor: James Thornburgh

Unit 3 Working Drawings. Instructor: James Thornburgh. What is Welding?. Combining materials together by melting Can use added material (filler) or not Mostly Metal, but can be Plastic. Types of Welding. Welding done onsite is a “Field Weld”. Gas & Arc Welding. Gas

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Instructor: James Thornburgh

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  1. Unit 3Working Drawings Instructor: James Thornburgh

  2. What is Welding? • Combining materials together by melting • Can use added material (filler) or not • Mostly Metal, but can be Plastic

  3. Types of Welding • Welding done onsite is a “Field Weld”

  4. Gas & Arc Welding • Gas • Use Burning Gas to Provide Heat • Oxygen & a Combustible Gas • Usually Acetylene • Can be MAPP or Propane • Arc • Use Electric Arc to Provide Heat • Shielded Metal Arc (Stick) • Metal Inert Gas (MIG) • Tungsten Inert Gas (TIG)

  5. Arc Welding Stick MIG TIG

  6. Resistance Welding • Use Electric Current to Provide Heat • Pressure to fuse materials together • No filler usually

  7. Resistance Welding • Spot • Seam • Flash

  8. Welded Joints

  9. Reference Line Leader Tail Weld Symbol

  10. Weld Symbol

  11. Weld Symbol Variations

  12. Weld Types • Fillet • Tee or Corner Joints • Grove • Butt or Edge Joints • Plug / Slot, Spot, Seam • Lap Joint • Surface • No Joint • Used to Add Material

  13. Weld Type Symbols

  14. Fillet Weld

  15. Square Grove

  16. V & Bevel Grove

  17. U & J Grove

  18. Plug & Slot

  19. Spot

  20. Seam & Surface

  21. Weld Increment

  22. Charts

  23. AutoCAD Welding Symbols • Welding Blocks • Use a Lisp Routine • Automated weld symbols, by Chris Crain • Cadalyst.com

  24. Lab Assignments & Homework • Lab • Prob 25.1, & 25.2 • Homework • Chapter Questions 1-6 • Online True-False Quiz

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