Patent ID: 7038161
Filing Date: 2006-05-02
Classification: B23K

Abstract:
1. A miniaturized laser beam welding device, the device comprising: a welding head constituted by a wall surrounding a cavity, the wall having an “admission” first opening and a “front” second opening, and a laser beam being suitable for entering into the welding head via the admission opening and leaving said welding head via the front opening by following a predefined light path, the welding head being fed with gas under pressure suitable for producing a “primary” gas flow in the cavity and leaving the welding head via the front opening, wherein the welding head includes a nozzle suitable for being connected to a source of gas under pressure, said nozzle being outside the welding head against its wall, the nozzle producing a “secondary” flow of gas under pressure sweeping the space situated immediately in front of the front opening transversely, in which the wall surrounding the front opening is referred to as a “front” wall, wherein the welding head includes a shield positioned in front of the front opening, the shield being substantially flat and parallel to the front wall, said shield being pierced by a hole situated in front of the front opening, the nozzle being positioned between the shield and the front wall.