DeltaN FS® system for friction-stir welding



The DeltaN FS® system provides high-quality welding on thick welded sections, using the solid-state friction stir welding technique.


A challenge in using friction-stir welding with thick sections is the inhomogeneous heat distribution that occurs from the top-side to the root-side of the welded sheet or plate. The Airbus Group-developed DeltaN FS® welding system decreases welding distortion and vertical down-forces on all section thicknesses and creates a nearly fully-symmetrical heat input throughout the welded section’s thickness.

The DeltaN FS® concept puts the high revolutions on the pin, and zero revolutions on the tool’s shoulder. It reduces contrapoints and opens new applications for friction-stir welding, such as dissimilar materials in butt joint configuration.


The DeltaN FS® technology has a variety of commercial applications in the aerospace, automotive, rail, and shipbuilding sectors, as well as other industries. Its aerospace applications include welding of business jet window frames, joining the hollow box section of an aircraft’s wing flap track, and tailor-welded blanks in the wing flap assembly.

The technology also is suited for spot welding, fabrication of die cast components, tailor-welded blanks, and the joining of structural crossmembers to longitudinal members in the automotive industry, in addition to welding long aluminum extrusions for the rail and shipbuilding sectors.

Value-added benefits

The DeltaN FS® system generates a superbly smooth welded surface similar to that of rolled sheet, with no need for post-weld-machining. With a simple, robust design, it enables a reduction of the welding distortion, and significantly reduces vertical down-force (compared with typical standard tools).

In addition, Airbus Group – and its licensing partners – can create a complete ecosystem for end users of the DeltaN FS® technology. The company’s agreements with such channel partners as authorized solution providers and authorized equipment manufacturers offer integrated solutions for customers, while Airbus Group’s APWORKS subsidiary delivers support through engineering services, consulting and concurrent engineering design services from within the group.


Available for production applications, with technical consultancy support available for easier introduction and start-up.


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