Joining of machined sandwich assemblies by friction stir welding

Stock material or miscellaneous articles – All metal or with adjacent metals – Honeycomb – or with grain orientation or elongated elements...

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428598, 428654, 2281121, B23K 2012, B32B 330, F16S 102

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06051325&

ABSTRACT:
The machined-sandwich structural assembly has two components joined together with a joint of substantially the same strength as the weakest base material. More specifically, the structural assembly includes a first structural member and a second structural member. The first structural member is spaced from the second structural member through a plurality of intermediate members which extend between the first structural member and the second structural member. The plurality of intermediate members are friction stir welded to the first structural member. The resultant assembly requires less stock material, takes less time to machine and has a joint of improved strength.

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Aluminum Extrusions Form Lighter, Stiffer Engine Cradle, C. J. Murray, Design News, May 5, 1997.
Interlocking Structural Panels Surpass Honeycomb's Strength, M. A. Gottschalk, Design News, Mar. 7, 1994.

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