Method and device for connecting the ends of steel tubes by...

B - Operations – Transporting – 23 – K

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Details

B23K 9/028 (2006.01) B21C 37/08 (2006.01) B23K 26/28 (2006.01) B23K 28/02 (2006.01)

Patent

CA 2757849

The invention relates to a method for connecting the ends of steel tubes by means of orbital welding using a hybrid laser arc technique, with the tubes preferably having wall thicknesses >= 6 mm and more particularly >= 12 mm and diameters of preferably >= 150 mm, the ends of which tubes are connected by one or more welding passes, wherein the laser and arc welding heads as tools are guided over a guide ring fixedly arranged around a tube end in the region of the weld site during the welding and are displaced around the tube diameter. The invention also relates to a device for carrying out the method, wherein the laser and the arc welding heads are positioned separately on the guide ring and are moved over the tube circumference and controlled independently of one another during the welding process.

L'invention concerne un procédé permettant de relier les extrémités de tuyaux en acier présentant de préférence des épaisseurs de paroi = 6 mm, en particulier = 12 mm, et des diamètres de préférence = 150 mm et dont les extrémités sont reliées par une ou plusieurs couches de soudage, au moyen d'un soudage orbital selon une technique hybride, au laser et à l'arc électrique, les têtes de soudage, respectivement au laser et à l'arc électrique, étant conduites par une bague de guidage fixée autour d'une extrémité du tuyau dans la zone de l'emplacement du soudage et déplacées autour de la circonférence du tuyau. L'invention porte également sur un dispositif destiné à la réalisation de ce procédé. Selon l'invention, lesdites têtes de soudage, respectivement au laser et à l'arc électrique, sont disposées séparément sur la bague de guidage et, au cours du soudage, sont déplacées et commandées indépendamment l'une de l'autre autour de la circonférence du tuyau.

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