Metallic welding

Menu :

• Laser principle
• Laser sources
• Applications
  • Cutting
  • Metallic welding
  • Plastic welding
  • Soldering
  • Brazing
  • Marking, engraving
  • Cleaning and surface preparation
  • Cladding
  • Surface alloying
  • Laser assisted machining
  • Laser machining

Metallic welding :

An optical system concentrates the energy of the laser beam, (105 W/cm² to 106 W/cm²) and generates a metallic matrix whose walls are covered with melted liquid metal. The resulting melting pool moves forward and liquid metal solidifies again behind the beam ensuring the metallurgical continuity of the parts.

Principle of laser welding

Characteristics

Welding with CO2 laser Welding of aluminium alloys with CO2 laser with use of filler wire	High speed, thin joint, low distortion Good precision, few or no remachining Adapted to a wide range of metallic materials, up to 10 mm thickness Cutting and welding possible with the same laser source
Welding with Nd-YAG laser Welding of silencer with Nd-YAG laser	Flexibility, 3 D welding, with the optic fibre can be used on different workstations Accurate welding, control of low energy deposit with pulsed Nd-YAG laser Nd-YAG laser allows to get comparable results with CO2 laser with the advantage of fiber optic but generally for a higher cost

Industrial applications

Welding with CO2 laser :

• Repair of turbojet engine covers
• Stainless steel heat exchangers
• Gear wheels
• Bowls
• Car body parts
• Diamond blades

Gearing welding

Welding with Nd-YAG :

• Spot welding of razor blades
• Thin sheet for rotor and stator
• Car body aluminium parts
• Gas filter aluminium boxes
• Gold chain link
• Titanium pacemakers
  

pacemaker before/after welding