Synergies; Summary - Fronius Laser hybride Instructions De Service

Absorption of the laser radiation is substantially influenced by the temperature of the work-
piece surface. At the start of welding, the initial reflectance must first be overcome, espe-
cially on aluminium surfaces. After the vaporisation temperature has been reached, a
vapour cavity is formed, with the result that nearly all the radiation energy can be applied
to the workpiece.

Synergies

The following synergies can be exploited from the merging of the laser and arc processes:
Advantages of LaserHybrid welding over the laser process on its own:
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Advantages of LaserHybrid welding over the arc process on its own:
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Summary

The arc welding process is characterised by the following properties:
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The laser component of the hybrid process achieves the following characteristics:
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Above a certain radiance, the laser light creates the "deep-weld effect" in metallic materi-
als, enabling components with larger wall thicknesses to be joined.
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(5)
(4)
(3)
(2)
(1)
It is possible to weld components with larger gap widths, thanks to the larger weld pool
Better gap-bridging ability when gap occurs only momentarily
Wider and deeper penetration
Considerably wider range of applications
Lower investment costs due to the use of a lower power laser
Greater seam ductility
Higher welding speed
Deeper penetration, despite the higher speeds
Low heat input ensuring the structure is affected as little as possible
Greater weld seam strength
Narrower weld seams
Low-cost energy source
Good gap-bridging ability
Ability to influence the structure by adding filler metal
Deep penetration
High welding speed
Low thermal load
Narrow weld seams
(1) Workpiece
(2) Beam cavity
(3) Laser-induced plasma
(6)
(4) Escaping metal vapour
(5) Laser beam
(6) Electrode
(7)
(7) Arc
(8) Shielding gas envelope
(8)
(9) Welding direction
(9)