초록 ▼

A method is disclosed for repairing a worn helicopter rotor blade made of composite materials by adhesively securing a supplemental leading edge abrasion wear strip made of nickel to the leading edge of the rotor blade. The periphery of the bonding surface of the leading edge of the rotor blade is m

A method is disclosed for repairing a worn helicopter rotor blade made of composite materials by adhesively securing a supplemental leading edge abrasion wear strip made of nickel to the leading edge of the rotor blade. The periphery of the bonding surface of the leading edge of the rotor blade is masked. The bonding surfaces of the supplemental leading edge strip and the rotor blade are cleaned with a medium-grit scrubbing pad, grit-blasted with aluminum oxide and then rinsed with DI water. A strip of a structural adhesive film is hot bonded to the bonding surface of the supplemental leading edge strip using vacuum and a high temperature oven cure. The side of the structural adhesive film bonding surface which will be secured directly to the rotor blade bonding surface is first abraded and then wiped with a solvent. An epoxy adhesive mix is applied to the bonding surfaces of the rotor blade and the structural adhesive film of the supplemental leading edge strip. The supplemental leading edge strip is then placed in position upon the leading edge of the rotor blade, positive pressure is applied and the adhesive mix is cured using a lower temperature cure than that used for hot bonding the structural adhesive film to the supplemental leading edge strip. Adhesive run-out from the mix is then faired to smoothly contour the interface between the supplemental leading edge strip, the cured adhesive mix and the previous surface of the rotor blade.

대표청구항 ▼

[ What is claimed is:] [1.] A method for repairing an outboard leading edge of a composite, helicopter rotor blade, comprising the steps of:providing a supplemental leading edge abrasion wear strip formed of nickel;preparing the outboard portion of the leading edge of the composite, helicopter rotor

[ What is claimed is:] [1.] A method for repairing an outboard leading edge of a composite, helicopter rotor blade, comprising the steps of:providing a supplemental leading edge abrasion wear strip formed of nickel;preparing the outboard portion of the leading edge of the composite, helicopter rotor blade for bonding;preparing an interior bonding surface of a supplemental leading edge abrasion wear strip for bonding;hot bonding a structural adhesive film to the interior bonding surface of the supplemental leading edge abrasion wear strip utilizing a high temperature cure; thenbonding the structural adhesive film to the outboard portion of the surface of the leading edge of the composite, helicopter rotor blade using a structural adhesive mix and a low temperature cure with positive pressure applied to the supplemental leading edge abrasion wear strip and the composite, helicopter rotor blade to bond the supplemental leading edge wear abrasion strip to the composite, helicopter rotor blade; andfairing the run out of the structural adhesive mix to contour a transition section gap extending between a trailing edge of the supplemental leading edge abrasion wear strip and a surface of the composite, helicopter rotor blade which is proximately adjacent to the trailing edge of the leading edge abrasion wear strip.