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Honeycomb sandwich composite material acoustic lining wall plate hole penetrating rate control method

A composite material and control method technology, which is applied to other household appliances, household appliances, household components, etc., can solve the problems of hole blockage, the through-hole ratio cannot meet the requirements, and the noise reduction function cannot be realized, so as to ensure the noise reduction and noise reduction. effect of effect

Inactive Publication Date: 2020-02-21
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a method for controlling the through-porosity of the acoustic lining panel of honeycomb sandwich composite material, including the manufacture of parts, the purpose is to overcome the sound of the adhesive film flowing into the composite skin when the honeycomb and the composite skin containing the array acoustic lining holes are glued together with the adhesive film. The lining hole causes the hole to be blocked, the through-hole ratio cannot meet the requirements, and the predetermined noise reduction function cannot be realized.

Method used

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  • Honeycomb sandwich composite material acoustic lining wall plate hole penetrating rate control method
  • Honeycomb sandwich composite material acoustic lining wall plate hole penetrating rate control method
  • Honeycomb sandwich composite material acoustic lining wall plate hole penetrating rate control method

Examples

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Effect test

Embodiment 1

[0033] The adhesive film is a high-temperature epoxy adhesive film cured at 180±5°C. The present invention provides a method for controlling the through-porosity of a honeycomb sandwich composite acoustic lining wall panel. The steps are as follows:

[0034] a. Composite lower skin molding: Fabric or unidirectional tape prepregs are used to lay up laminates on tooling 1 according to the predetermined layup angle and number of layups. After sealing the bag, use an autoclave to cure, demould, and cut .

[0035] b. Lay a layer of adhesive film 4 and peelable layer 5 on the lower skin 3 of the composite material in sequence, after laying isolation film 6 and air felt 7 in sequence, and lay putty strips 2 on the edge, and assemble with 8 vacuum bags Seal the bag and pre-cure at 100±10°C for 20-30min.

[0036] c. Drill the array holes of the composite board prepared in b.

[0037] d. Tear off the strippable layer on the drilled combination board with the array holes completed in...

Embodiment 2

[0040] In the present invention, the adhesive film bonded between the lower skin 3 of the composite material and the honeycomb core 10 is pre-cured for a short time on the lower skin 3 of the composite material, and then the acoustic lining array holes are drilled together with the peelable layer 5 . The specific operation process is as follows:

[0041] a. Use fabric or unidirectional tape prepreg to complete the manufacture of the composite material lower skin 3, and the composite material lower skin 3 is in the state of a cured laminate;

[0042] b. Before the acoustic lining hole 9 is drilled in the lower skin 3 of the composite material, a layer of adhesive film 4 and a peelable layer 5 are successively laid on its surface. The function of the peelable layer is to protect the adhesive film 4, prevent pollution and facilitate subsequent Adhesive bonding, short-term pre-curing at a temperature lower than the final curing temperature of the adhesive film.

[0043] c. Drill...

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Abstract

The invention provides a honeycomb sandwich composite material acoustic lining wall plate hole penetrating rate control method. The method is characterized in that glue films and strippable layers aresequentially pre-laid on composite material skins in a pre-curing mode, short-time pre-curing is carried out under the condition of being lower than the curing temperature of the glue film, pre-gluing of the glue film and the composite material skin is achieved, the pre-glued composite material skin is drilled to form acoustic lining array holes, the strippable layer is removed, and then the pre-glued composite material skin is glued with the honeycomb and honeycomb core upper composite material skin. According to the method, the layer of glue film is pre-cured on the honeycomb core lower composite material skin, and then the acoustic lining array holes are drilled, so that the hole penetrating rate after the honeycomb sandwich composite acoustic lining wall plate is glued is effectivelyensured without reducing the bonding strength of the acoustic lining wall plate and the honeycomb sandwich.

Description

technical field [0001] The invention proposes a method for controlling the through-porosity of the acoustic lining wall board of honeycomb sandwich composite material, aiming to solve the problem of holes caused by the adhesive film flowing into the acoustic lining holes when the adhesive film is used to glue the honeycomb and the composite skin containing the array acoustic lining holes Blockage, the through-hole ratio cannot meet the requirements, and the established noise reduction and noise reduction functions cannot be realized. Background technique [0002] Due to the excellent comprehensive performance of carbon fiber reinforced resin-based composite materials, the proportion of application in the field of engine parts has gradually increased, such as external casings, stator blades, rotor blades, containment casings, thrust reversers and other components. At the same time, due to the low density of composite materials, it can significantly reduce the structural weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D99/00
CPCB29D99/0021
Inventor 文友谊文诗琦李静尧陈翠向海蔡豫晋龚志红
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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