welding

welding

1. what is welding

   • Welding is the permanent union of metals by the action of heat.

2. welding processes

   • Autógeno
     • no filler material required.
   • Homogéneo
     • the filler material has a different composition than the base metal.
   • Homogeneous
     • the filler material has the same composition as the base metal.

3. the weld be divided into

   • Soft welding (soldering)
   • Strong welding (brazing)

4. fusion welding

   • Oxyacetylene welding
   • Arc welding
     • Shielded metal arc welding
     • Gas metal arc welding (GMAW) / Metal inert gas (MIG)
     • Gas tungsten arc welding (GTAW) / Tungsten inert gas (TIG)
   • Resistance spot welding (RSW)

5. Welding joints can be categorized into

   • Lap joints
   • T-joints
   • Butt joints
   • Corner joints
   • Edge joints

6. Tip

   • if base materials are thick, it is required a bevelling to ease the welding. Some types of bevelling
     • junctions are square
       • single V
       • double V
       • double U
       • single U
       • single J
       • double J
       • single bevel
       • double bevel