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A method for implanting a sound-absorbing diaphragm of an embedded sound-absorbing honeycomb and an implanting tool

An embedded, honeycomb technology, applied in chemical instruments and methods, lamination devices, transportation and packaging, etc., can solve the problems of difficult implantation operations, increase the overall weight of the honeycomb, reduce the overall weight and facilitate the implantation operation. Effect

Active Publication Date: 2019-03-19
AVIC BASIC TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following problems: First, most membrane materials are difficult to maintain the flanging state for a long time without external constraints, and often quickly develop into a planar shape after the external constraints are removed, making it difficult to plant. Second, in order to fix the diaphragm, the entire honeycomb needs to be immersed in the glue tank to re-dip the glue, which increases the overall weight of the honeycomb

Method used

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  • A method for implanting a sound-absorbing diaphragm of an embedded sound-absorbing honeycomb and an implanting tool
  • A method for implanting a sound-absorbing diaphragm of an embedded sound-absorbing honeycomb and an implanting tool

Examples

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Effect test

Embodiment 1

[0026] 1. Choose NH-1-5.5-48 honeycomb produced by AVIC Composite Materials, and process a piece of aramid paper honeycomb with a thickness of 30mm and a cell size of 5.5mm, and reserve it;

[0027] 2. Manufacture the blank of the muffler diaphragm:

[0028] 2.1. Choose a piece of Sefa 75-25BHY acoustic mesh;

[0029] 2.2. Select the SY-24C epoxy resin film produced by Beijing Institute of Aeronautical Materials, and print regular hexagonal hollow patterns on the acoustic cloth. The regular hexagonal pattern is the hollow part, and the rest is the film. The side length of the regular hexagon is 5.5mm, and the distance between the centers of adjacent regular hexagons is 18mm;

[0030] 2.3. Cut the acoustic cloth into a square piece with a side length of 18mm;

[0031] 3. Implantation of anechoic diaphragm blank:

[0032] 3.1. Using the implant tool, insert the cut acoustic diaphragm blank into the honeycomb unit at a height of 15mm, and pull out the implant tool after stayin...

Embodiment 2

[0035] 1. Select the aluminum honeycomb with the brand name LF2Y-5-0.06-49 produced by AVIC Composite Materials, and process a piece of aluminum honeycomb with a thickness of 30mm and a cell size of 5mm for spare;

[0036] 2. Manufacture the blank of the muffler diaphragm:

[0037] 2.1. Choose a piece of Sefa 145-27BHY acoustic mesh;

[0038] 2.1. Choose a piece of Sefa 75-25BHY acoustic mesh;

[0039] 2.2. Select the SY-24C epoxy resin film produced by Beijing Institute of Aeronautical Materials, and print regular hexagonal hollow patterns on the acoustic cloth. The regular hexagonal pattern is the hollow part, and the rest is the film. The side length of the regular hexagon is 5.5mm, and the distance between the centers of adjacent regular hexagons is 18mm;

[0040] 2.3. Cut the acoustic cloth into a square piece with a side length of 18mm;

[0041] 3. Implant the blank of the sound-absorbing diaphragm 2:

[0042] 3.1. Using the implant tool, insert the cut acoustic diap...

Embodiment 3

[0045]1. Choose NH-1-4.5-60 honeycomb produced by AVIC Composite Materials, and process a piece of aramid paper honeycomb with a thickness of 20mm and a cell size of 4.5mm, and reserve it;

[0046] 2. Manufacture the blank of the muffler diaphragm:

[0047] 2.1. Choose a piece of Sefa 145-27BHY acoustic mesh;

[0048] 2.2. Select the SY-24C epoxy resin film produced by Beijing Institute of Aeronautical Materials, and print regular hexagonal hollow patterns on the acoustic cloth. The regular hexagonal pattern is the hollow part, and the rest is the film. The side length of the regular hexagon is 5.5mm, and the distance between the centers of adjacent regular hexagons is 15mm;

[0049] 2.3. Cut the acoustic cloth into circular pieces with a diameter of 15mm;

[0050] 3. Implant the blank of the sound-absorbing diaphragm 2:

[0051] 3.1. Using the implant tool, insert the cut acoustic diaphragm blank into the honeycomb unit at a height of 15mm, and pull out the implant tool af...

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Abstract

The invention belongs to a functional honeycomb manufacturing technology, and relates to a manufacturing method and an implanting tool for an in-line muffling honeycomb. The steps of implanting the muffling diaphragm are as follows: selecting the honeycomb substrate; determining the position of the uppermost muffling diaphragm (2); honeycomb substrate dipping; manufacturing the muffling diaphragm blank plate; and implanting the muffling diaphragm (2). The invention provides a manufacturing method and an implanting tool for an in-line muffling honeycomb, which simplifies the process, improves the manufacturing efficiency and reduces the manufacturing cost.

Description

technical field [0001] The invention belongs to the functional honeycomb manufacturing technology, and relates to a method for implanting a sound-absorbing diaphragm of a built-in sound-absorbing honeycomb and an implanting tool. Background technique [0002] The embedded sound-absorbing honeycomb was first proposed by Hexcel Corporation of the United States, and has been successfully applied in the sound-absorbing liners of aircraft engines such as A380. In this structure, because the sound-absorbing diaphragm in each honeycomb unit divides the air layer into multiple closed sub-cavities, this kind of embedded sound-absorbing honeycomb is implanted with micro-perforated partitions or partitions at a certain height of the honeycomb space. The diaphragm not only achieves the purpose of the multi-degree-of-freedom sound-absorbing structure, but also avoids a series of shortcomings of the traditional multi-degree-of-freedom sound-absorbing structure. U.S. Patent No. 7,434,659B...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/12B32B1/06B32B37/14B32B1/00
CPCB32B3/085B32B3/12B32B37/146B32B2307/102B32B2305/024B32B2305/028B32B2605/18
Inventor 纪双英史湘宁王芙蓉许健翔刘杰
Owner AVIC BASIC TECH RES INST
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