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Method for bonding foam layer and aluminum alloy skin

A bonding method and aluminum alloy technology, which is applied in the field of foam sandwich structure composite material aviation parts manufacturing, to achieve the effect of improving manufacturing quality, improving bonding strength, and preventing parts from being scrapped

Inactive Publication Date: 2017-04-19
SHAANXI AIRCRAFT CORPORATION
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The present invention is mainly aimed at the bulging problem that often occurs on the surface of the aluminum alloy skin foam sandwich structure aviation structure parts. Combining with the analysis of the cause of the bulging problem, a process method for improving the bonding strength of the aluminum alloy skin and the foam core is found, and through Strength test and installation application verification can effectively solve the problem of aluminum alloy skin bulging

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0013] A bonding method for a foam layer and an aluminum alloy skin,

[0014] Step 1. Clean the surface to be bonded of the aluminum alloy skin with alcohol. After the alcohol volatilizes, apply a layer of J-241 adhesive evenly on the surface to be bonded of the aluminum alloy skin, and then spread a layer of EW100 alkali-free glass cloth Paste on the surface of the aluminum alloy skin to be bonded and then brush a layer of J-241 adhesive to ensure that the glass cloth is completely soaked;

[0015] Step 2. Clean the surface of the foam core to be bonded with alcohol. After the alcohol volatilizes, apply a layer of J-241 adhesive evenly on the surface to be bonded of the foam core. The respective edge lines are aligned and glued together, and the glass cloth on the skin remains flat and wrinkle-free during gluing, forming a multi-layer structure;

[0016] Step 3: Place the glued multi-layer structure on the flat mold, cover the multi-layer structure with isolation film, air f...

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Abstract

The method belongs to the manufacturing technical field of foam sandwich structure composite material aeronautical parts. According to the swelling problem frequently happening to the surfaces of the aluminum alloy skin foam sandwich structure aeronautical parts, a method for bonding a foam layer and aluminum alloy skin is provided. The method specifically includes the several steps of being to bond the aluminum alloy skin, bonding a foam core, and performing vacuum pumping and pressure maintaining.

Description

technical field [0001] The invention belongs to the technical field of foam sandwich structure composite material aviation parts manufacturing, and relates to a bonding method of a foam layer and an aluminum alloy skin. Background technique [0002] Aluminum alloy skin foam sandwich structural parts are widely used in aircraft structures due to their advantages of light weight and simple structure. The bonding process (i.e. the material process specification) is: clean and dry the surface of the aluminum alloy skin and the surface of the foam core to be bonded, apply the selected J-241 adhesive evenly on the surface of the aluminum alloy and the foam core to be bonded, and then Align the two according to the corresponding benchmarks and glue them together, and then cure them for 24 hours at an ambient temperature of 25°C and a relative humidity of no more than 75%. However, the parts manufactured according to the usual adhesive bonding process often have local bulges on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34
CPCB29C70/342
Inventor 冉安国罗喜东刘庆华郭绍华段正才苏航王翀董月琴黄智勇路敏菲张东致刘博王文全韩敏熊师
Owner SHAANXI AIRCRAFT CORPORATION
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