| 摘要 |
The invention provides a welding device ( 10 ) using a power laser beam ( 22 ), the device ( 10 ) being miniaturized, the device ( 10 ) being suitable for being moved very close to the surface ( 52 a) of the part ( 52 ) to be welded and of reaching welding zones that are difficult to access, but without vapor and particles of molten metal ( 56 ) being capable of penetrating into the inside and dirtying the optical components ( 28, 48, 46 ). Such a device is remarkable in that it includes a feed ( 26 ) of gas under pressure suitable for producing a primary flow of gas ( 50 ) leaving via the front opening ( 20 ) together with the laser beam ( 22 ), and in that it also includes a nozzle ( 60 ) connectable to a source of gas under pressure, said nozzle ( 60 ) producing a secondary flow of gas ( 62 ) sweeping the front opening ( 20 ) transversely, thereby deflecting the primary flow of gas ( 50 ) laterally.
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