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AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsSteffen Bonss, Jens Standfuss, Eckhard Beyer
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The invention relates to a method and a device for laser-beam welding, because the invention is especially suitable for deep welding a wide variety of materials. The object of the invention is to weld a wide variety of materials by means of laser radiation, especially by deep welding, with a reduced amount of work and at the same time good quality of the welded joint produced. The procedure adopted for this according to the invention is that the intensity of the laser radiation is set by beam-shaping in and on the surface of workpieces in such a way that a small area in the workpiece is irradiated with a great intensity, to form a steam capillary there, and a further, larger adjacent area on the workpiece surface is irradiated with a lesser intensity, and as a result a bell-shaped opening of the steam capillary is formed on the workpiece surface and the cooling rate of the melted material is reduced.
A method of laser-beam welding in which a steam capillary with a widened opening is formed in a workpiece using two laser beams or two partial beams of one laser beam, wherein the intensity of the laser radiation is increased by beam-shaping with maximum intensity in the workpiece for forming the steam capillary widened in a bell-shaped manner, and a further, larger adjacent area on the workpiece surface is irradiated with lesser laser intensity.
Dependencies are inferred from the claim text.