LASER BEAM WELDING

Laser Beam Welding (LBW) is a high energy density welding process that uses electromagnetic radiation (light) to obtain fine, penetrating HQ weld at elevated speeds. The incident light is concentrated on the part surface leading to very intense local heating which melts the metal immediately. The joint is produced by relative displacement between the beam and the parts. The hybrid laser-GMAW process (HLW) combines laser and arc welding in the same melt pool leading to penetrating welds with increased gap bridging capability.

 

Application field and advantages

  •  Various laser processes are available: pulsed LBW (for better control of the heat input), fiber LBW (for obtaining very fine welds) and a hybrid LBW-arc version
  • Many possible joint configurations
  • Typically without use of filler metal but with some shielding gas (Ar, He, …)
  • Large welding capacities: from very thin to approx. 5mm steel (even more in case of multipass laser-GMAW hybrid welding)
  • Weldability: can be used on most metals. For example: steels, stainless steel, nickel, titanium etc and most of their alloys, copper & aluminium are more difficult. Heterogeneous welds are sometimes possible
  • Reliable, precise, fast and reproducible process
  • Small deformation and thin heat affected zone

 

 

 CRM facility

Trumpf TRULASER CELL 3010

  • Workstation connected to 2 laser sources: pulsed and fiber laser for welding and cutting (max 2 mm thick steel)
  • Laser power (pulsed laser, 1064 nm): 200W continuous, 8 kW peak
  • Laser power (fiber laser, 1070 nm): 400 W

trulaser

Kuka robot with Trumpf optics

  •  KUKA KR30 HA robot equipped for laser and laser-GMAW hybrid welding
  • Laser power: 3 kW
  • Laser specifications: 1064 nm, 600 µm fibre, 25 mm.mrad
  • Laser focal distance: 150 mm and 250 mm
  • GMAW source: Fronius TP4000
  • GMAW source: 3 – 400 A and 14.2 – 34 V
  • Max linear feed speed: > 5 m/min
  • Max linear reach: approx 2 m/min
  • Additionally: positioner with 2 rotational axis,

kuka