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OXYFUEL TECHNIQUE

TECHNIQUES & TROUBLESHOOTING

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LEARNING GOALS

  • We can…
    • Identify the types of flame

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    • Demonstrate proper technique for oxyacetylene welding

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    • Troubleshoot oxyacetylene problems

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PROCEDURES FOR LIGHTING THE TORCH

  1. Check that torch valves are closed
  2. Check that regulator adjusting screws are loose
  3. Open acetylene cylinder valve ¼ turn
  4. Slowly open oxygen cylinder valve all of the way
  5. Set the working pressure on the acetylene regulator gauge
  6. Set the working pressure on the oxygen regulator gauge
  7. Open the acetylene gas torch valve
  8. Light the flame
  9. Adjust to a neutral flame

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FLINT STRIKER

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WELDING FLAME TYPES

Carburizing Flame

Neutral Flame

Oxidizing Flame

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TORCH APPLICATIONS

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PROCEDURES FOR RUNNING A BEAD

  1. Bring the flame to just above the metal

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  1. Allow a puddle (wet spot) to form on the metal that is approximately the size of two pencil erasers

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  1. Tilt the torch to a 45 degree angle

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  1. Run your filler rod through your flame to get it warm

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  1. As you slowly push the puddle forward, dip the filler metal into the center of your puddle

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  1. Move forward and continue dipping consistently

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WELDING TORCH ANGLES

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PROCEDURES FOR RUNNING A BEAD

  • https://www.youtube.com/watch?v=79cjSbjtr7Y
    • Start at 20:30 and end at 20:55
    • Start at 22:39 and end at 22:49

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WELD QUALITY

Good

Torch Too Hot

Melting Filler with Flame

Torch Slow

Torch Fast

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WELDING TROUBLESHOOTING

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EQUIPMENT SHUTDOWN

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PROCEDURES FOR SHUTTING DOWN

  1. Close acetylene torch valve
  2. Close oxygen torch valve
  3. Close acetylene and oxygen cylinder valves
  4. Open both torch valves on torch body to release any gas
  5. Watch until you see the gauges read 0
  6. Once they read 0, close torch valves
  7. Turn adjusting screws on acetylene and oxygen until the turn freely

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SHOW WHAT YOU KNOW!

  1. How far do you open an acetylene cylinder?
    • 1/4 turn
  2. Which flame has two cones?
    • Carburizing flame
  3. Approximately how big should your puddle be?
    • The size of two pencil erasers
  4. What is your travel angle when running a bead?
    • 45 degrees
  5. If my bead appears high and sitting on top of my metal, what is the problem?
    • Flame is melting the filler metal rather than the puddle
  6. Put the following in order for shut down: cylinder valve, torch vale, regulator adjusting screws
    • Torch valves, cylinder valves, regulator adjusting screws