Laser machining machines and methods for lap welding of workpieces

In a laser machining machine (1) for laser welding of workpieces, in particular for lap welding of DBC structures, comprising a laser beam generator for generating a laser beam and an optical imaging system for imaging the laser beam into a machining plane, according to the invention, the optical im...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Kaiser, Elke, Broghammer, Gerhard
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:In a laser machining machine (1) for laser welding of workpieces, in particular for lap welding of DBC structures, comprising a laser beam generator for generating a laser beam and an optical imaging system for imaging the laser beam into a machining plane, according to the invention, the optical imaging system comprises an optical beam-shaping system, which images the laser beam in the machining plane with an imaging depth (Δd) of at least ±2 mm, preferably of at least ±5 mm, in such a way that the radial power density distribution (Pr) of the laser beam is bell-shaped along the imaging depth (Δd) in each plane at right angles to the beam axis and the maximum values (Pmax) of these bell-shaped power density distributions (Pr) along the imaging depth (Δd) vary in relation to one another by less than 10%, preferably by less than 5%.