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Ablation-resistant/bearing integrated air inlet and integral forming method

An integral molding and ablation-resistant technology, which is applied in the field of composite materials, can solve problems such as easy delamination of the interface, low reliability of the air inlet, and complicated molding methods, and achieve simple molding reduction, good process stability, and operability Sexuality, good demonstration effect and the effect of popularizing and applying value

Active Publication Date: 2020-05-26
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an integral part of high-speed aircraft, the air inlet is required to have the requirements of anti-scouring, ablation resistance and load bearing. In order to meet the above functional requirements, the combination of ablation material and structural material is generally used to prepare composite material components. The existing air intake The molding method of the air inlet is not integrally formed, the molding method is relatively complicated, and the interface between the two materials used is prone to defects such as delamination, resulting in low overall reliability of the air inlet

Method used

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  • Ablation-resistant/bearing integrated air inlet and integral forming method
  • Ablation-resistant/bearing integrated air inlet and integral forming method
  • Ablation-resistant/bearing integrated air inlet and integral forming method

Examples

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Embodiment 1

[0050] Make an anti-scouring and ablation-resistant integrated air inlet, the diameter of the largest end is 190mm, the diameter of the small end is 100mm, and the total length is 420mm. Among them, the ablation-resistant layer 1 is a high-silica chopped fiber / aminophenolic premix with a thickness of 5mm, and the bearing layer 2 is a T700 carbon fiber / aminophenolic prepreg with a thickness of 3mm.

[0051] The specific implementation process of the overall co-curing molding process of the anti-scouring and ablation-bearing integrated air inlet is as follows:

[0052] Step 1: Brush the release agent on the surface of the mold, and lay up layers according to the block plan and design thickness;

[0053] The second step: pre-cure according to the pre-cure process of high-silica chopped fiber / aminophenolic premix, that is, cure at 90°C for half an hour;

[0054] Step 3: For pre-cured molded parts, perform L-shaped lap joints on the male mold according to the design drawings to pr...

Embodiment 2

[0058] Make an anti-scouring and ablation-resistant integrated air inlet, the diameter of the largest end is 190mm, the diameter of the small end is 100mm, and the total length is 420mm. The ablation-resistant layer 1 is a quartz chopped fiber / aminophenolic premix with a thickness of 4mm, and the bearing layer 2 is a T700 carbon fiber / aminophenolic prepreg with a thickness of 4mm.

[0059] The specific implementation process of the overall co-curing molding process of the anti-scouring and ablation-bearing integrated air inlet is as follows:

[0060] Step 1: Brush the release agent on the surface of the mold, and lay up layers according to the block plan and design thickness;

[0061] The second step: pre-cure according to the pre-cure process of quartz chopped fiber / aminophenolic premix, that is, cure at 90°C for half an hour;

[0062] Step 3: For pre-cured molded parts, perform L-shaped lap joints on the male mold according to the design drawings to prepare ablation-resista...

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Abstract

The invention provides an ablation-resistant / bearing integrated air inlet and an integral forming method, which comprise the following steps: step 1, forming an ablation-resistant layer preform, comprising: 1.1 dividing the ablation-resistant layer into a plurality of block structures based on the structure of the ablation-resistant layer; 1.2 on the basis of any block structure, adopting a prepreg layering and curing process of an ablation-resistant layer in a mold, and obtaining a plurality of pre-cured block structures, wherein the prepreg is not completely cured; 1.3 overlapping and bonding a plurality of pre-cured block structures on a male die according to the structure of the ablation-resistant layer to obtain an ablation-resistant layer preform. Step 2, layering the prepreg of thebearing layer on the ablation-resistant layer preform, and co-curing the whole layered structure after the layering is finished, wherein the curing system of the prepreg of the ablation-resistant layer is the same as that of the prepreg of the bearing layer. Step 3, demolding after cooling. The method disclosed by the invention solves the problems of complex forming mode of an existing air inlet,easy layering of the interface of the ablation layer and the bearing layer, and poor overall reliability.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an ablation-resistant / load-bearing integrated air inlet and an integral molding method. Background technique [0002] With the continuous improvement of aircraft combat technical indicators, more stringent requirements are put forward for the lightweight structure and overall reliability of the missile body. As an integral part of high-speed aircraft, the air inlet is required to have the requirements of anti-scouring, ablation resistance and load bearing. In order to meet the above functional requirements, the combination of ablation material and structural material is generally used to prepare composite material components. The existing air intake The forming method of the air inlet is not integrally formed, and the forming method is relatively complicated, and the interface between the two materials used is prone to defects such as delamination, resulti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/68
CPCB29C70/68B29C70/683
Inventor 李丽英裴雨辰刘爱军王国勇
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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