Repairing method for aluminum panel honeycomb sandwich structure super-large-area debonding

Abstract

The invention discloses a repairing method for aluminum panel honeycomb sandwich structure super-large-area debonding. The repairing method comprises the following steps that step1, an aluminum panelhoneycomb sandwich structure debonding area is divided into a plurality of repairing units; step2, a repairing glue solution is injected into honeycomb lattice holes of the repairing units multiple times to be cured; step3, an aluminum panel and an adhesive film are paved and pasted on the aluminum panel honeycomb sandwich structure debonding area, and nondestructive testing is performed in the paving and pasting process; and step4, the aluminum panel honeycomb sandwich structure debonding area is cured, and repairing is completed. The repairing method is good in process stability, the anti-explosion gathering problem of large-dose glue injection in the repairing process is solved, and the problems of paving and pasting exhausting in the aluminum panel repairing process and improving the fitting degree of the panel and the molded surface are solved.

Description

technical field [0001] The invention belongs to the adhesive repair technology of metal structures, and relates to a repair method for super large-area debonding of honeycomb sandwich structures of aluminum panels. Background technique [0002] Aluminum panel honeycomb sandwich structure is widely used in aviation manufacturing industry due to its high design rigidity and low weight. For the panel and honeycomb debonding defects in the honeycomb sandwich structure of the aluminum panel, for the small debonding area (generally less than 200mm×200mm), the current repair method is: remove the aluminum panel in the debonding area, and inject EA9396 into the honeycomb in the debonding area After the glue is cured, lay a layer of aluminum panel and J-95 adhesive film on the debonded position and cure again, or remove the honeycomb and aluminum panel in the debonded area and replace the honeycomb and aluminum panel to complete the repair. [0003] In the published patent on alumin...

AI Technical Summary

Problems solved by technology

[0006] 1) Simultaneously pouring a large amount of EA9396 glue will cause the glue to heat up and damage the parts of the unbonded interlayer structure;

[0007] 2) Repairing large-area honeycomb damage with ordinary aluminum panel paving will lead to poor adhesion between the repaired aluminum panel and the repaired surface, and the repaired sandwich structure cannot meet the requirements of non-destructive testing and appearance testing

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