Method and device for connecting thick-walled metal...

B - Operations – Transporting – 23 – K

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B23K 26/14 (2006.01) B23K 26/26 (2006.01) B23K 26/30 (2006.01)

Patent

CA 2691715

The invention relates to a method for connecting thick-walled metal workpieces by welding. In order to create the weld joint, the cross-sections are provided with a maximum of three weld regions according to wall thickness, the welding being carried out by a combined use of welding methods: the first weld region (root) is welded by means of laser beam welding or hybrid laser-arc welding, the second weld region is welded by means of hybrid laser-arc welding, and the third weld region required occasionally depending on the thickness of the sheet metal is welded by means of hybrid laser-arc welding or simply arc welding. The invention also relates to a seam preparation corresponding to the respective welding method used.

L'invention concerne un procédé servant à assembler par soudure des pièces métalliques à paroi épaisse. A cet effet, pour réaliser la soudure, les sections transversales sont munies d'au plus trois zones de soudure en fonction de l'épaisseur de paroi et le soudage se fait par une utilisation combinée de divers procédés de soudage : la première zone de soudure (racine) est soudée par soudage au laser ou par soudage hybride laser/arc, la deuxième zone de soudure est soudée par soudage hybride laser/arc et la troisième zone de soudure éventuellement nécessaire en fonction de l'épaisseur de tôle est soudée par soudage hybride laser/arc ou uniquement par soudage à l'arc. L'invention concerne également une préparation du cordon de soudure adaptée au procédé de soudage respectivement mis en oeuvre.

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