Metal working – Method of mechanical manufacture – Electrical device making
Patent
1997-04-16
1998-11-10
Cuda, Irene
Metal working
Method of mechanical manufacture
Electrical device making
2988961, 29 2351, B23P 1500
Patent
active
058326057
ABSTRACT:
A method for fabricating a helicopter blade subassembly includes the steps of providing a blade compaction apparatus having a lower assembly configured for mating with an upper assembly. The lower assembly includes a base having a contoured upper airfoil nest with at least two guide ramps and a plurality of leading-edge pusher cams disposed proximal thereto. The upper assembly includes a support structure supporting a flexible impervious membrane, wherein the flexible impervious membrane and the contoured upper airfoil nest define a molding cavity therebetween upon mating of the upper assembly to the lower assembly. The method further includes disposing the upper airfoil skin and the core in combination with the contoured upper airfoil nest, and then connecting a tip end support insert and a root end support insert in combination with the spar assembly, wherein each of the support inserts include guide members. The spar assembly is located in chordwise alignment in the contoured upper airfoil nest by driving the guide members into conics in the guide ramps and driving the spar assembly into a core conic with the leading-edge pusher cams. The lower airfoil skin is then disposed in combination with the core and the spar to form the helicopter blade subassembly, and then the upper assembly is mated to the lower assembly. The air within the molding cavity is then evacuated such that evacuating the air causes the flexible impervious membrane to apply compaction forces to the helicopter blade subassembly.
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Jones Corey D.
Kovalsky David A.
Leahy Kevin P.
Cuda Irene
Sikorsky Aircraft Corporation
Solomon Adam C.
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