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Laser beam welding device comprises a vacuum chamber comprising a retainer for a workpiece, a laser beam source arranged outside the vacuum chamber, and a vacuum window that forms a beam inlet opening into the vacuum chamber
Laser beam welding device comprises a vacuum chamber comprising a retainer for a workpiece, a laser beam source arranged outside the vacuum chamber, and a vacuum window that forms a beam inlet opening into the vacuum chamber
The laser beam welding device comprises a vacuum chamber (12) comprising a retainer for a workpiece (22), a laser beam source (16) arranged outside the vacuum chamber, and a vacuum window (20) that forms a beam inlet opening into the vacuum chamber. A condensation surface (26): is provided in a region of a beam path in the vacuum chamber; comprises a determined minimum temperature difference to the temperature of the beam inlet opening; comprises a low temperature than the beam inlet opening; is cooled by a cooling apparatus; and surrounds the beam. The laser beam welding device comprises a vacuum chamber (12) comprising a retainer for a workpiece (22), a laser beam source (16) arranged outside the vacuum chamber, and a vacuum window (20) that forms a beam inlet opening into the vacuum chamber. A condensation surface (26): is provided in a region of a beam path in the vacuum chamber; comprises a determined minimum temperature difference to the temperature of the beam inlet opening; comprises a low temperature than the beam inlet opening; is cooled by a cooling apparatus; surrounds the beam; is designed as a cylinder inner surface, a surface of a filament, a funnel surface or an aperture plate, where the laser beam passes in the middle of the surface; has a flake-like or disc-shaped structure; and is disposed adjacent to the beam inlet opening. The beam inlet opening is heated by a heating device. The aperture plates are arranged in a row. The cooling apparatus comprises a coolant circuit, which is led out from the vacuum chamber. The coolant delivers its heat over a heat exchanger that is arranged outside the vacuum chamber.
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