Patent ID: 8378253
Filing Date: 2013-02-19
Classification: B23K

Abstract:
1. A process for laser welding employing a nozzle for welding by a laser beam, the nozzle formed from a nozzle body comprising: an upper surface; a lower surface; a peripheral wall; an axis X-X; an axial cut-out extending between the upper and lower surfaces and being provided in the peripheral wall so as to form an external channel recessed relative to a surface of said peripheral wall; and a plurality of internal passages drilled through the nozzle body between the upper and lower surfaces, wherein the nozzle body has a semi-frustoconical configuration; the surface of the peripheral wall from which the external channel is recessed is flat; the internal passages are adapted for conveying a gas or a gas mixture; and the axial cut-out extends through the nozzle body along the axis X-X so as to allow a laser beam to pass and forms an open channel to the outside over all its length.