Laser supported friction stir welding method

B - Operations – Transporting – 23 – K

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B23K 20/12 (2006.01) B23K 20/24 (2006.01) B23K 26/06 (2006.01) B23K 33/00 (2006.01)

Patent

CA 2414946

The invention relates to a laser supported friction stir welding method. In order to develop said FSW method further, such that, in particular, thick workpieces can also he welded with a high joining quality, the sides of the workpieces (1, 2) to be joined are particularly matched. The side surfaces (1a, 2a), pressed against each other ate thus formed such that the side surfaces (1a, 2a) touch in a base region (A), giving rise to a gap (s) between the side surfaces (1a, 2a) on the workpiece surface (C), facing in the direction of the tool (4) and the laser (6) and a cavity is provided in the mid-section (B).

La présente invention concerne un procédé de soudage par friction et agitation (<i>friction stir welding</i> : FSW) assisté par laser. L'objectif de cette invention est d'améliorer un tel procédé FSW, notamment de façon à pouvoir également souder des pièces épaisses et ce, avec une haute qualité de jonction. A cette fin, les faces des pièces (1, 2) devant être jointes sont adaptées de manière spécifique. Les surfaces latérales (1a, 2a) comprimées l'une contre l'autre sont conçues de façon à se toucher dans la zone de racine de la soudure (A), de manière à laisser un interstice (s) entre elles, à la surface de la pièce (C) dirigée vers l'outil (4) et le laser (6), et de façon à créer une cavité dans la zone médiane (B).

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