PROCEDE DE SOUDAGE LASER UTILISANT UNE BUSE APTE A STABILISER LE KEYHOLE
    1.
    发明授权
    PROCEDE DE SOUDAGE LASER UTILISANT UNE BUSE APTE A STABILISER LE KEYHOLE 有权
    激光焊接使用状况的飞机是钥匙孔稳定

    公开(公告)号:EP2240294B1

    公开(公告)日:2012-07-04

    申请号:EP08870211.3

    申请日:2008-12-16

    摘要: The invention relates to a method for welding with a laser beam, using a welding nozzle comprising: a nozzle body (1) having an axis and including at least an upper surface (6), a lower surface (7) and a peripheral wall (5); an axial cavity (2) extending between the upper (6) and lower (7) surfaces of the nozzle body (1) so as to define an outer channel (2) recessed from the surface of said peripheral wall (5); and a plurality of inner passages (3) drilled through the nozzle body (1) between the upper and lower surfaces (6, 7). The laser welding method of the invention provides a dynamic gas jet mechanically interacting with the molten metal bath, and further enables better control of the bath hydrodynamic flows, and thus better laser-welding efficiency.

    摘要翻译: 本发明涉及一种用于使用激光束焊接,使用焊接喷嘴,包括:具有轴线的喷嘴本体,并且包括至少上表面,下表面和周壁上; 在轴向腔中的喷嘴体的上表面和下表面之间延伸,从而限定在从所述外周壁的表面凹陷外通道; 和内部通道的多个穿过上表面和下表面之间的喷嘴主体钻。 本发明的激光焊接方法提供了一个动态气体射流与熔融金属浴机械相互作用,和进一步使更好地控制浴水动力流动的,从而更好地激光焊接的效率。

    PROCÉDÉ DE SOUDAGE LASER DE TYPE CO2 AVEC BUSE À JET DYNAMIQUE
    6.
    发明公开
    PROCÉDÉ DE SOUDAGE LASER DE TYPE CO2 AVEC BUSE À JET DYNAMIQUE 有权
    VERFAHREN ZUM CO2-LASERSCHWISSEN MIT EINER DYNAMISCHENSTRAHLDÜSE

    公开(公告)号:EP2346640A1

    公开(公告)日:2011-07-27

    申请号:EP09741361.1

    申请日:2009-09-03

    IPC分类号: B23K26/08

    摘要: The invention relates to a method for the laser welding of metal parts that comprises generating a CO
    2 laser beam, dispensing a protection gas jet made of said gas or gas mixture in the direction of the junction plane between the parts, melting and evaporating the metal of the metal parts with the laser beam in order to generate a metal vapour capillary with the simultaneous generation of a metal plasma that propagates outside the metal vapour capillary and thus forms a metal plasma plume above said junction plane. The protection gas jet is further directed towards the metal plasma plume forming above the junction plane. The gas jet is preferably directed so that the latter comes flush with the top of the metal plasma plume and impinges on the part(s) at a location where the metal of said parts has not been molten by the beam.

    摘要翻译: 激光焊接工艺包括使用二氧化碳激光发生器产生激光束,向喷嘴(4)供应气体或气体混合物,使用喷嘴沿着接头平面的方向分配保护气体喷射,使用 由金属部件组成的金属的激光束,熔化和蒸发以形成金属蒸气(2)的毛细管,同时在片的厚度处或在接合处形成金属等离子体。 金属等离子体在金属蒸气的毛细管外传播,形成金属等离子体簇(1)。 激光焊接工艺包括使用二氧化碳激光发生器产生激光束,向喷嘴(4)供应气体或气体混合物,使用喷嘴沿着接头平面的方向分配保护气体喷射,使用 由金属部件组成的金属的激光束,熔化和蒸发以形成金属蒸气(2)的毛细管,同时在片的厚度处或在接合处形成金属等离子体。 金属等离子体在金属蒸气的毛细管外传播,形成在接头平面上方的金属等离子体簇(1)。 保护气体的喷射方向朝向金属等离子体簇的方向,以使它们形成在接头平面之上。 保护气体喷射冲击金属等离子体簇的顶部和不被激光束熔化的单一金属部分。 通过沿着接头平面根据待焊接的部件的梁的相对位移来逐渐地进行熔化和蒸发。 气体射流轴与激光束轴之间测量的气体射流冲击点与激光束之间的距离在片的上表面(7a)上的距离大于或等于 喷嘴。 喷嘴相对于件的上表面的内径为1-50mm。 喷嘴根据接头平面定位,使得焊接线的轴线的倾斜角(α)和喷嘴的轴线在待焊接的头部平面中的倾斜角(α)为170°至-170°, deg]。 喷嘴根据要焊接的部件的上表面定位,使得气体射流或喷嘴的轴线(5)的角度(θ)为5-70°。 气体喷射以250m / s的速度分布。

    SOUDAGE LASER DE PIÈCES REVÊTUES DE ZINC
    8.
    发明公开
    SOUDAGE LASER DE PIÈCES REVÊTUES DE ZINC 审中-公开
    LASERSCHWISSUNG ZINKBESCHICHTETER TEILE

    公开(公告)号:EP2219817A2

    公开(公告)日:2010-08-25

    申请号:EP08854149.5

    申请日:2008-11-06

    IPC分类号: B23K26/12 B23K26/14

    摘要: The invention relates to a method that uses a laser beam for welding a zinc-coated metal part with at least a second metal part, in which: the parts are positioned so as to be in contact or near-contact relative to each other so that there is no or practically no gap between said parts; the weld bead is formed by melting the metal with the formation of a capillary or keyhole filled with metal vapours immediately downstream from the impact point of the beam on the part(s); and a first gas flow is directed solely towards the opening of the metal vapour capillary in order to apply a dynamic gaseous pressure thereon sufficient for maintaining the capillary sufficiently open for ensuring the discharge of at least a portion of the zinc vapours from the surface coating during the entire relative movement of the laser beam relative to the parts. The method is particularly adapted for welding parts in the automotive industry.

    摘要翻译: 本发明涉及一种使用激光束用至少第二金属部件焊接镀锌金属部件的方法,其中:部件被定位成相对于彼此接触或接近接触,使得 所述部件之间没有或几乎没有间隙; 焊缝通过熔融金属而形成,其中形成毛细管或钥匙孔,其紧紧地在梁的冲击点的下游部分上装满金属蒸气; 并且第一气流仅被引导到金属蒸汽毛细管的开口,以便在其上施加足够的动态气体压力,以使毛细管充分开放,以确保在表面涂层期间排出至少一部分锌蒸气 激光束相对于部件的整个相对运动。 该方法特别适用于汽车工业中的焊接部件。