Joining: Welding

Welding processes are used for the joining of metals (particularly steel and aluminium) and plastics.
It is estimated, that for the joining of aluminium parts in 40 to 50 per cent of the cases welding processes are involved. The thing all welding processes have in common is that they produce a permanent substance-to-substance joint between the workpieces by applying energy at the weld seam which leads to plastification or melting of the materials allowing them to be brought together firmly. Often an additional filler of the same or similar metal is used.

The welding energy comes, according from the process used, from a variety of sources, which may also be combined in some processes.

Welding Processes

There are over 30 differing processes available for welding aluminium.

Roughly we may categorize the welding processes into fusion welding processes, where the material is fully molten by high temperatures and in pressure welding processes the melting energy is combined with mechanic pressure. In the case of pressure welding processes, there is often no need to bring the material to their liquid state.

  • Fusion Welding
    • Arc Welding
      • MIG Metal Inert Gas
      • TIG Tungsten Inert Gas
    • Beam Welding
      • Laser Welding
      • Electron-Beam Welding
    • Hybrid Welding Processes
  • Pressure Welding
    • Resistance Welding
      • Point Welding
      • Seam Welding
      • Projection Welding
    • Friction Welding
      • Linear Friction Welding
      • Rotation Welding
      • Ultrasonic Welding
      • Friction stir welding