Metal fusion bonding – Process – With shaping
Patent
1997-07-10
1999-08-24
Evans, Geoffrey S.
Metal fusion bonding
Process
With shaping
228181, 2988972, B23K 3102
Patent
active
059414464
ABSTRACT:
An airfoil-shaped structure having a continuous, seamless, structurally reinforced, leading edge is fabricated using a superplastic forming/diffusion bonding process which results in a simpler and more cost effective structure. The airfoil-shaped structure includes a core assembly having welded together core sheets and a facial component being defined by a face sheet having a 180.degree. bend therein so that the two face sheet ends are aligned. To fabricate the airfoil-shaped structure the core assembly is inserted inside the facial component, thereby forming an intermediate assembly having a plurality of cells. The intermediate assembly is inserted into a die cavity, after which the airfoil-shaped structure, having predetermined design characteristics, is superplastically formed by heating the die and selectively pressurizing the plurality of cells using only two forming pressures.
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Evans Geoffrey S.
Knapp Jeffrey T.
McDonnell Douglas Corporation
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