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Method for preventing paint cracking on surface of transition region between composite material paddle and metal part

A composite material and transition zone technology, applied to household components, other household appliances, household appliances, etc., can solve problems such as cracks on the paint surface, affecting the appearance and quality of composite material blades, etc., to achieve simple and convenient operation, shorten repair cycle, cost reduction effect

Active Publication Date: 2019-04-09
JIANGXI CHANGHE AVIATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The surface of the composite material blade needs to be bonded with different metal parts. During the flight, the deformation of the metal part is different from that of the composite material, which leads to cracks easily appearing on the paint surface in the transition area, which affects the appearance and quality of the composite material blade. quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] A method for cracking the surface of the transition zone between a composite material blade and a metal piece, wherein the transition zone is surface treated before painting, comprising the following steps:

[0018] 1) Surface treatment

[0019] 1) Roughly grind the metal parts and composite material blades in the transition zone (it is recommended to use fine sandpaper above No. 400);

[0020] 2) Clean the transition area with acetone or alcohol and let it dry.

[0021] 2) Compounding and priming

[0022] 1) Configure EA9309.3 glue: mix components A and B evenly according to the weight ratio of 100:22;

[0023] 2) Spray the first coat of EA9203 primer in the transition area and let it dry for 15-20 minutes, then spray the second coat of EA9203 primer and let it dry for 15-20 minutes.

[0024] 3) Bonding

[0025] 1) Cut a piece of glass cloth (EW210 or EW110) with a width of about 25-30mm;

[0026] 2) Spread the prepared EA9309.3 glue evenly on the surface of the g...

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PUM

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Abstract

The invention belongs to the field of manufacturing of composite material blades, in particular to a method for preventing paint cracking on the surface of a transition area between a composite material paddle and a metal part. The surface of the composite material paddle needs to be provided with different metal parts in a glued mode, the deformation amount of the metal part is different from that of the composite material in the flying process, so that the appearance and the quality of the blade of the composite material are influenced due to the fact that cracks are easily generated on thepaint surface of the transition area. According to the method for preventing paint cracking on the surface of the transition region between the composite material paddle and the metal part, the surface treatment is carried out on the transition area before paint spraying, the rough grinding is carried out on the part of the transition area, and the cleaning and airing are carried out; the bottom glue is sprayed and aired; the glass cloth is cut and is glued and soaked, the glass cloth is laid in the transition area, and a vacuum bag is manufactured for vacuumizing and pressing; the surface ofthe vacuum bag is cleaned after solidified; and the method for preventing paint cracking on the surface of the transition region between the composite material paddle and the metal part is safe and reliable in quality, simple and convenient to operate and capable of reducing the maintenance cost, so that the repairing period of the surface cracks of the blade metal part is shortened.

Description

technical field [0001] The invention belongs to the field of composite material paddle manufacturing, and in particular relates to a method for preventing paint cracks on the surface of a composite paddle and a metal part transition area. Background technique [0002] The surface of the composite material blade needs to be bonded with different metal parts. During the flight, the deformation of the metal part is different from that of the composite material, which leads to cracks easily appearing on the paint surface in the transition area, which affects the appearance and quality of the composite material blade. quality. Contents of the invention [0003] The purpose of the present invention is to provide a safe and reliable method for preventing paint cracks on the surface of the transition zone between the composite material blade and the metal part, and this method can also perform surface treatment on the composite material blade after cracks appear. [0004] The tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44B29C70/54B29L31/08
CPCB29C70/443B29C70/54B29C70/542B29L2031/082
Inventor 王广雷徐凌波熊烺录钱栋祥许漂李江钰
Owner JIANGXI CHANGHE AVIATION IND
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