Trumpf Laser- Und Systemtechnik Gmbh

Johannes Seebach

Nicolai Speker

Olga Kramlich

Tim Hesse

Oliver Bocksrocker

Artur Schellenberg

Philipp Scheible

Adrian Wolf

A method for laser welding two coated workpieces includes positioning an upper workpiece and a lower workpiece on top of each other and passing a first laser beam over the upper and lower workpieces from a side of the upper workpiece so as to at least partially evaporate the respective coating of each of the workpieces on their facing sides along a depletion trace. A second laser beam is passed over the workpieces from the side of the upper workpiece so as to melt a material of the two workpieces within the depletion trace, and thereby weld the workpieces to one another. In the first laser passing, the first laser beam melts the material of the upper workpiece, so that a web of non-melted material of the upper workpiece remaining between the melted material of the upper workpiece and the facing side of the upper workpiece.

Method for laser welding two coated workpieces

A laser cutting nozzle for a laser machining unit is described, the nozzle including a passage for the laser beam and cutting gas. The passage extends between a nozzle inlet and a nozzle mouth along a passage longitudinal axis. The passage comprises a convergence portion and a divergence portion. In the entire divergence portion, the wall of the passage forms an angle of inclination relative to the passage longitudinal axis of at most 5°. In addition, the length of the divergence portion is less than 5 times the diameter of the constriction.

Laser cutting nozzle for a laser machining unit and method for operating such a laser machining unit

The disclosure relates to methods and systems for joining at least two workpieces, including forming a weld joint by moving a machining beam, e.g., a laser beam, and the at least two workpieces relative to one another along a feed direction, wherein the movement of the machining beam and the two workpieces relative to one another is superimposed with a periodic movement in a movement path, e.g., a two-dimensional movement path, which extends in a transverse direction perpendicularly to the feed direction and, e.g., additionally in the feed direction. The movement path has, between two reversal points in the transverse direction, at least one stop point at which a speed component of the periodic movement in the transverse direction is zero. The invention also relates to computer program products and systems for carrying out the methods.

Methods and systems for joining at least two workpieces

A laser cutting nozzle for a laser machining unit is described, the nozzle including a passage for the laser beam and cutting gas. The passage extends between a nozzle inlet and a nozzle mouth along a passage longitudinal axis. The passage comprises a convergence portion and a divergence portion. In the entire divergence portion, the wall of the passage forms an angle of inclination relative to the passage longitudinal axis of at most 5&#xb0;. In addition, the length of the divergence portion is less than 5 times the diameter of the constriction.

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Stuttgart, Germany

Johannes Seebach