MIG Welding Guide
MIG (metal inert gas) welding, also known as gas metal arc welding (GMAW), is a key joining technology in manufacturing. This book provides a comprehensive, practical and accessible guide to this widely used process.
TABLE OF CONTENTS MIG Welding Guide
List of Figures
Chapter 1: The MIG Welding Process
- Figure 1.1: The principle of MIG welding. 1. Electric arc. 2. Electrode. 3. Reel or drum. 4. Drive rollers. 5. Flexible conduit. 6. Hose package. 7. Welding gun. 8. Power source. 9. Contact tip. 10. Shielding gas. 11. Shielding gas nozzle. 12. Weld pool.
- Figure 1.2: The voltage distribution in the arc.
- Figure 1.3: Deposition rate for some wire diameters (solid wire, ESAB Autrod 1 2.51).
- Figure 1.4: The effect of wire polarity on penetration.
- Figure 1.5: Welding current decreases if wire stick-out length is increased.
- Figure 1.6: The resulting magnetic force acting on the arc is directed downwards.
- Figure 1.7: The magnetic force acting on the droplet may be either upwards or downwards depending on arc size in relation to wire diameter.
- Figure 1.8: Drop diameter as a function of the welding current.
- Figure 1.9: Arc types for different current and voltage conditions.
- Figure 1.10: High-speed film of short circuiting arc welding. The whole sequence represents 7 ms of welding. Two short circuits appear. The second short circuit is an occasional touch without any metal transfer.
- Figure 1.11: Arc voltage and current sequence during short arc welding.
- Figure 1.12: Drop transfer in spray arc welding.
- Figure 1.13: Effect from a nearby electrode. If one of the wires has AC current the arc-blow effect is reduced.
- Figure 1.14: Checking cast diameter (1) and helix size (2).
- Figure 1.15: Cross-section of solid and cored wire.
- Figure 1.16: Definitions of contact tip-to-work distance (1), wire extension...
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