Trumpf Laser- Und Systemtechnik Gmbh

Jens Brueggebors

Nicolai Speker

Oliver Bocksrocker

A hairpin welding method welds wire ends of at least two copper wires, arranged flush next to one another, to one another by a laser beam. The laser beam is generated with a beam cross section that impinges on the wire ends at an end side and has a round core region and a ring region surrounding the round core region. A ratio of an external diameter of the ring region to a diameter of the core region is between 7:1 and 2:1. A ratio of a laser power in the core region to a laser power in the ring region is between 10:90 and 70:30.

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Schwieberdingen, Germany

Jens Brueggebors