European Aeronautic Defence and Space Company Eads France

European Aeronautic Defence and Space Eads France

Eads Ccr

Francois Marie

Baptiste Guerin

The invention relates to a double shouldered welding device for the friction stir welding of parts, in which at least one shoulder has two concentric rings providing two plane concentric bearing surfaces, the rings being arranged so that the smaller-diameter ring is capable of compressing the stirred material of the parts to be welded during advance of the welding device and so that the larger-diameter ring is capable of forming a sink-in stop for the smaller-diameter ring. The invention also relates to a method of friction stir welding by means of the welding device according to the invention, in which said device is force-driven.

Double-shouldered welding device for the friction stir welding of parts, and welding method

The invention relates to a process for the friction stir welding of two panels (), using a welding device () having a retractable pin (), comprising the following steps: positioning the two panels () so as to be in contact over an overlap region () and keeping them in the desired relative position after welding; bringing the welding device into contact with the upper panel at the start of the welded joint; longitudinally welding the two panels, by moving the welding device as far as the end of the welded joint; continuing to move the welding device () along a path extending beyond the end of the welded joint; and retracting the retractable pin () so as to prevent the appearance of a weld hole in a portion of the path of the welding device () extending beyond the end of the welded joint.

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Rueil Malmaison, France

Francois Marie