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A repair method of paper honeycomb sandwich structure

A technology of sandwich structure and paper honeycomb, which is applied in the repair field of paper honeycomb sandwich structure, which can solve the problems of increased weight of paper honeycomb sandwich parts, affecting the repair quality, and enhanced rigidity of the repair area of ​​sandwich parts, so as to avoid weight increase and simple operation method Effect

Active Publication Date: 2017-09-29
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the filler density is higher than that of paper honeycomb, the weight of paper honeycomb sandwich parts will increase when repaired by this method, resulting in local rigidity in the repair area of ​​sandwich parts, which will affect the repair quality.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:

[0022] The steps of the repair method of this kind of paper honeycomb sandwich structure are:

[0023] Step 1. Grinding and removing the carbon fiber layer on the surface of the paper honeycomb interlayer part, the honeycomb depression and debonding, and the skin bulging defect area;

[0024] Step 2. Mix EA9396 glue produced by French Helicopter and phenolic resin particles at a mass ratio of 13:1 to make a filler, and use the filler to repair the honeycomb depression debonding and skin bulging defect areas of the paper honeycomb sandwich, and restore the shape After the filler is solidified, the vacuum cleaner will vacuum the surface of the restored surface;

[0025] Step 3. Use carbon fiber ECS0031 soaked in EA9396 glue to fill the carbon fiber layer on the surface of the removed paper honeycomb sandwich part with honeycomb depression and debonding,...

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Abstract

The invention provides a repairing method for a paper honeycomb sandwich structure. According to the repairing method for the paper honeycomb sandwich structure, paper honeycomb sandwich pieces in sunk debond and skin bulge defect areas are replaced, fillers do not need to be injected into the paper honeycomb sandwich pieces, and the problem that the weight of the paper honeycomb sandwich pieces is increased due to repairing is solved. Compared with a traditional repairing method, the operation method is relatively simple, and the problem that the local stiffness of repaired areas of the sandwich pieces is reinforced is solved.

Description

technical field [0001] The invention relates to a repair method for a paper honeycomb sandwich structure, which belongs to the technical field of surface treatment of composite materials. Background technique [0002] The traditional repair methods for honeycomb dent debonding and skin bulge defects of paper honeycomb sandwich parts are relatively complicated. Usually, the bulge skin is removed, filler is injected into the honeycomb dent debonding area, carbon fiber is filled in the area where the bulge skin is removed, and the skin is re-pasted. method to repair. Since the density of the filler is higher than that of the paper honeycomb, the weight of the paper honeycomb sandwich will increase when repaired by this method, resulting in an increase in local rigidity in the repair area of ​​the sandwich and affecting the quality of the repair. Contents of the invention [0003] The present invention is designed to provide a repair method for a paper honeycomb sandwich stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C73/02B29C73/04
CPCB29C73/02B29C73/04
Inventor 康健祁书涛
Owner HARBIN