Fabrication of monolithic stiffening ribs on metallic sheets
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United States of America Patent
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Feb 23, 2016
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app pub date -
Dec 17, 2014
filing date -
Dec 18, 2013
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Abstract
An additive friction stir fabrication method and system is described which may be used to fabricate and join a rib to a metallic substrate or to repair a defect in a metallic substrate through extrusion. The method may be carried out with or without the addition of preformed ribs. One such method involves feeding a friction-stir tool with a consumable filler material such that interaction of the friction-stir tool with the substrate generates plastic deformation at an interface between the friction-stir tool and a metallic substrate to bond the plasticized filler and substrate together and extrude this material through a forming cavity to form a rib joined to the metallic substrate. Further described is a system for fabricating a rib joined to a metallic substrate through extrusion.
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