Laser Welding

Laser welding

Laser welding
  • Low, and very concentrated energy input into the component
  • Butt weld, overlap welds and fillet weld possible
  • Less or no annealing colours
  • Applicable with or without filler material (depending on material and welding joint preparation)
  • Sheet metal from thickness 0.1 mm weldable

Laser welding is used for temperature sensitive and thin-walled assemblies. The locally concentrated heat input reduces distortions and the occurrence of annealing colours. This welding process makes it possible to manufacture filigree weld seams on components which are difficult to access.

For laser beam welding (LBW) a laser medium is excited by light from the outside to emit photons with a defined wavelength and the light beam is enforced. The used laser medium determines the wavelength of the beam, its state of aggregation defines the type of laser. A distinction is made between solid state, gas and dye laser. They can be operated continuously or pulsed. The generated beam is focused on the component using optics and melts only a small spot due to its diameter of only 0.2 mm. This explains the low heat input which enables the joining of temperature-sensitive components such as feedthroughs. Tensions and distortions are minimal. Because of the small melting area, this welding process is sensitive in regard to impurities in and on the component and requires a gap-free fitting of the components to be joined. The beam is very small compared to other joining technologies and is used to weld spots which cannot be accessed with other welding technologies.