Molding method of aramid fiber composite material frequency selection surface reflector

A technology of frequency selective surfaces and composite materials, which is applied to chemical instruments and methods, aircrafts, and aerospace vehicles to achieve the effect of ensuring surface quality and profile accuracy and avoiding large changes in profile

Active Publication Date: 2017-05-17
XI'AN AIRCRAFT INTERNATIONAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention mainly uses the "B" stage pre-cured NOMEX honeycomb core, the reflector adopts a multi-step molding method, the cured reflector is subjected to thermal cycle aging and room temperature aging treatment, and the surface of the reflector substrate is bonded with copper-clad polyimide. Amine film and other methods have solved the problems of surface accuracy control of frequency selective surface reflector of aramid fiber composite material and forming of surface metal array.

Method used

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  • Molding method of aramid fiber composite material frequency selection surface reflector
  • Molding method of aramid fiber composite material frequency selection surface reflector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] Implementation example: manufacture of a satellite frequency selective sub-reflector

[0056] Main materials: Aramid fiber prepreg Kevlar 49-120, adhesive film REDUX 312UL, NOMEX honeycomb core ("B" stage pre-cured), copper-clad polyimide film, foam glue FM410-1

[0057] 1) Reflector forming mold

[0058] The material of the reflector forming mold is ductile iron, hollow structure, the thickness requirement is 15mm, the surface roughness is not greater than 0.8, and the surface precision RMS is not greater than 0.03.

[0059] 2) Honeycomb core preforming

[0060] Lay the "B" stage pre-cured NOMEX honeycomb core 4 on the reflector forming mold, and cure and form it in an autoclave after bag making.

[0061] 3) Forming of the upper skin (non-working surface)

[0062] Based on the reflector forming mold, a dummy for upper skin molding is manufactured, and the thickness of the dummy is equal to the sum of the thickness of the reflective surface skin and the honeycomb cor...

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Abstract

The invention provides a molding method of an aramid fiber composite material frequency selection surface reflector. The problems of profile accuracy control of the aramid fiber composite material frequency selection surface reflector and molding of a surface metal array are mainly solved by adopting a multi-step molding method, thermal cycle ageing and room-temperature aging treatment on a solidified reflector, a method of bonding a copper-coated polyimide membrane on the surface of a reflector substrate by using an adhesive film through a procured NOMEX honeycomb core and a reflector at a 'B' stage.

Description

technical field [0001] The invention relates to the field of molding and manufacturing of composite materials, in particular to the technical field of molding and manufacturing of frequency selective surface reflectors of aramid fiber composite materials used in the aerospace field. Background technique [0002] The rapid development of satellite communication technology has put forward higher requirements for the lightweight, high precision and high stability of antenna equipment in the aerospace field. Because aramid fiber composite materials have excellent mechanical properties, anti-aging properties, electrical insulation properties, wave-transmitting properties, and low linear expansion coefficient, they have broad application prospects in satellite antenna engineering. Especially in airborne, shipborne, spaceborne radar radomes, double grid antenna reflectors, frequency selective surface reflectors, phased array antennas, antenna support structures, etc., aramid fiber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B37/10B32B37/06B32B38/00B29C70/34B29C70/44B64G1/22B29L31/34
CPCB29C70/342B29C70/44B29L2009/003B29L2031/34B29L2031/608B32B37/06B32B37/1018B32B37/12B32B38/0012B64G1/22
Inventor 张静王学春
Owner XI'AN AIRCRAFT INTERNATIONAL
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