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TIG Welding Basics and Techniques

May 2, 2025

Introduction to TIG Welding

Key Concepts

  • TIG Welding: Tungsten Inert Gas welding, known for precision.
  • Objective: Demystify TIG welding setup and basics within 20 minutes.
  • Approach: Focus on essential setup and practice basics without overwhelming with information.

Equipment Overview

TIG Machines

  • Yeswelder's TIG 250P: Advanced with AC/DC capabilities, suitable for aluminum.
  • Yeswelder's MIG 205 DS: Multi-process (MIG, Stick, DC TIG).
    • DC TIG only (not suitable for aluminum).
    • No foot pedal operation in basic setup.

Basic Setup for TIG Welding

Gas

  • Type: 100% pure argon gas.
  • Flow Rate: 15-20 cubic feet per hour.
  • Common Mistake: Using 75/25 gas (used in MIG) results in poor shielding.

Tungsten Electrodes

  • Preferred Types: Blue and gray tungsten.
  • Avoid: Red tungsten (contains harmful substances).
  • Grinding: Essential for clean arc.
    • Grinding Technique: Grind with lines running lengthwise, not in spirals.
    • Dedicated Grinding Stone: Recommended for best results.

TIG Torch Components

  • Components: Torch, tungsten, collet, stubby gas lens, and cups.
  • Cups: Clear Pyrex preferred for better visibility.
  • Gas Lens: Stubby type offers better gas coverage.

Setup and Operation

  • Ground and Torch Connection:
    • Ground clamp on positive terminal.
    • TIG torch on negative terminal.
  • Gas Flow Setup: Directly from regulator to the torch.
    • Manual valve operation: Open fully for optimal sealing.

TIG Welding Technique

Arc Initiation

  • Lift Technique: Touch down tungsten, lift to initiate arc.
    • Scratch vs. Lift: Lift is cleaner and preferred.
  • Arc Maintenance: Maintain a 3/16 inch distance from the metal.
    • Avoid dipping tungsten into metal (causes contamination).

Welding Process

  • Cleanliness: Crucial for quality welds.
    • Remove mill slag, rust, paint.
    • Use acetone to clean filler rod and work surface.
  • Holding the Torch:
    • Comfort and stability are essential.
    • Maintain a steady hand and consistent angle.

Practice Tips

  • Arc Control: Consistent distance and angle.
  • Shielding Gas: Ensure continuous coverage to avoid contamination.
  • Filler Technique:
    • Introduce filler rod without moving it in and out of gas coverage area.

Safety and Maintenance

  • Protective Gear: Use thin TIG gloves, auto-dimming helmet.
  • Respirator: Important for aluminum and stainless steel welding.
  • Gas Management: Always turn off argon gas after use to avoid leaks.

Final Remarks

  • Practice: Essential for mastering techniques.
  • Video Recap: Provides a foundational understanding of TIG welding basics, setting the stage for further exploration into more advanced techniques like aluminum welding.

These notes capture the essence of the video on TIG welding basics, focusing on setup, technique, and the importance of practice and safety.

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