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Method and device for preparing honeycomb sandwich structure with microperforated face plate, and such structure

A sandwich structure and micro-perforation technology, applied in the direction of chemical instruments and methods, lamination, layered products, etc., can solve the problem of high cost, and achieve the effect of avoiding high cost and time-consuming and laborious

Active Publication Date: 2018-12-04
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve efficiency, this method often requires the preparation of special perforated tooling. Once the specifications of the perforated panel are changed, the perforated tooling needs to be remade, and the cost is high

Method used

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  • Method and device for preparing honeycomb sandwich structure with microperforated face plate, and such structure
  • Method and device for preparing honeycomb sandwich structure with microperforated face plate, and such structure
  • Method and device for preparing honeycomb sandwich structure with microperforated face plate, and such structure

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preparation example Construction

[0023] Such as figure 1 A preparation method of a sandwich structure containing a micro-perforated panel is shown, comprising the following steps:

[0024] 1) Select the honeycomb substrate: the honeycomb substrate is selected from aramid paper honeycomb, glass cloth honeycomb, aluminum honeycomb or plant fiber honeycomb, the depth of the honeycomb is h=5mm~500mm, and the side length of the honeycomb unit is L=2mm~8mm;

[0025] 2) Select the film: the film can be epoxy film, double horse film or polyimide film, the thickness of the film is t=0.02mm-0.15mm;

[0026] 3) Preparation of micro-perforated panel and rigid backplane: select or prepare a 0.2mm-10mm thick panel and a rigid backplane, and process the panel into a micro-perforated panel by laser drilling or mechanical drilling, with a microhole diameter of 0.1 mm-3mm, perforation rate 2%-20%;

[0027] 4) Prepare a special needle roller: the needles in the needle roller are arranged in a regular triangle, the distance be...

Embodiment 1

[0034] 1) Select the honeycomb matrix: select NH-5.5-48 produced by AVIC Composite Materials, a piece of aramid paper honeycomb core with a height of 40mm, and set aside.

[0035] 2) Select the adhesive film: choose the J-116 epoxy adhesive film produced by Heilongjiang Petrochemical Research Institute, the thickness of the adhesive film is t=0.4mm;

[0036] 3) Preparation of micro-perforated panel and rigid back panel: select two 0.5mm thick glass steel plates, one of which is used as a rigid back panel, and the other is processed into a micro-perforated panel by mechanical drilling, with a perforation rate of 5% and a hole diameter of 1.0mm;

[0037] 4) Prepare a special needle roller: the needles in the needle roller are arranged in an equilateral triangle, the distance between the needles is 9.526mm, the needle diameter is 0.2mm, and the length is 15mm;

[0038] 5) Film perforation: Use a needle roller to pre-perforate the film, and then lay the film on the honeycomb. When...

Embodiment 2

[0041] 1) Select the honeycomb matrix: select NRH-5-48 produced by AVIC Composite Materials, a piece of aramid paper honeycomb core with a height of 20mm, and set aside.

[0042] 2) Select the adhesive film: choose the J-154 epoxy adhesive film produced by Heilongjiang Petrochemical Research Institute, the thickness of the adhesive film is t=0.3mm;

[0043] 3) Preparation of micro-perforated panel and rigid back panel: select two 1.0mm thick glass steel plates, one of which is used as a rigid back panel, and the other is machined into a micro-perforated panel with a perforation rate of 5% and a hole diameter of 1.0mm;

[0044] 4) Prepare a special needle roller: the needles in the needle roller are arranged in an equilateral triangle, the distance between the needles is 8.66mm, the needle diameter is 0.2mm, and the length is 15mm;

[0045] 5) Film perforation: Use a needle roller to pre-perforate the film, and then lay the film on the honeycomb. When laying, try to make the pr...

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Abstract

The present invention discloses a method and device for preparing a honeycomb sandwich structure with a microperforated face plate, which belongs to the field of making composite material sandwich structures. The method comprises: selecting a honeycomb substrate, selecting a glue film, preparing a microperforated face plate and a rigid back plate, preparing a special needle roller, and carrying out the steps of pre-breaking, hole breaking, combing, curing and the like before the glue film is used, thereby obtaining a final sandwich structure. The sandwich structure with the microperforated face plate prepared by the technical solution of the present invention can be applied to the field of noise elimination. According to the present invention, the bonding quality is ensured, and meanwhile,the micro-holes of the face plate are prevented from being blocked by the glue film.

Description

technical field [0001] The invention belongs to the functional honeycomb manufacturing technology, and relates to a preparation method, equipment and structure of a honeycomb sandwich structure containing micro-perforated panels. Background technique [0002] In order to reduce the noise of the aircraft engine structure, the current noise reduction technology mostly adopts the sound-absorbing structure of the sandwich material prepared by the micro-perforated panel / honeycomb composite, which is characterized in that the honeycomb and the micro-perforated plate are bonded together, and the composite structure is composed of a rigid backplane. . The principle of noise reduction is that the external sound waves are absorbed and transmitted into the honeycomb structure through the holes regularly distributed on the panel, and the sound waves are reflected, refracted, passed and absorbed inside the honeycomb, and are no longer conducted through the holes that enter, so as to achi...

Claims

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Application Information

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IPC IPC(8): B32B3/12B32B3/24B32B27/02B32B17/02B32B9/02B32B15/04B32B7/12B32B15/08B32B15/12B32B27/08B32B27/12B32B37/12B32B37/14B32B38/04B64C1/40B26F1/24
CPCB26F1/24B32B3/12B32B3/266B32B5/02B32B7/12B32B15/08B32B15/12B32B27/08B32B27/12B32B37/1284B32B37/144B32B37/146B32B38/04B32B2038/047B32B2250/40B32B2260/021B32B2262/0269B32B2262/06B32B2262/101B32B2307/102B32B2605/18B64C1/40
Inventor 纪双英史湘宁刘杰许健翔郝巍
Owner AVIC COMPOSITES
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