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A kind of preparation method of light-weight sandwich structure long row cover for rocket

A sandwich structure and long-row cover technology, applied in the field of non-metallic materials, can solve the problems of foam core material dependence on imports, late application, and overall performance gap, etc., and achieve the effects of improving structural rigidity, increasing manufacturing costs, and improving structural strength

Active Publication Date: 2021-09-07
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of foam interlayer composite materials in my country is relatively late in the high-end field, and most of the foam core materials used in aerospace applications rely on imports. Although domestic research is underway, there is still a certain gap between the overall performance and similar foreign products.

Method used

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  • A kind of preparation method of light-weight sandwich structure long row cover for rocket
  • A kind of preparation method of light-weight sandwich structure long row cover for rocket
  • A kind of preparation method of light-weight sandwich structure long row cover for rocket

Examples

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Effect test

example 1

[0037] A method for manufacturing long-row hoods made of carbon-glass hybrid fabric sandwich composite materials. The long-row hoods involved in the method have a section width of 236mm, a height of 180mm, and a length of 1292mm. Thickness 4mm; The method comprises the following steps:

[0038] (1) The mold for long rows of hoods is processed and designed according to the product resistance deformation formula, and the angle between the high outward opening and its theoretical position is 1.5 degrees.

[0039] (2) After the mold is in place, carry out surface treatment and prepare corresponding MT300-3K carbon cloth / 603, SW280F / 603 prepreg and density of 110kg / m 3 PMI foam;

[0040](3) Brush epoxy 603 primer on the surface of PMI foam, and let it cool for not less than 0.5h;

[0041] (4) Lay the first layer of outer skin T300-3K / 603 on the mold, vacuum and compact it at room temperature, and then lay the second layer of outer skin SW280 / 603 prepreg;

[0042] (5) Install the...

example 2

[0048] A method for making long-row hoods made of T700 / 603A sandwich composite materials, the cross-section of the long-row hoods to be made involved in the method is 240mm wide, 128mm high, 1003mm long, 100mm high and wide side chamfers, and the thickness of the PMI foam in the middle sandwich core 4mm; the method includes the following steps:

[0049] (1) The lay-up plan of the long-row hood is {outer skin D (±45° / 90° / 0°)-PMI foam core material (thickness 4㎜)-reinforced area D (±45 / 90° / 0° ) 6 - inner skin D (0° / 90° / ±45°)}. Among them, D is T700 / 603A carbon fiber unidirectional tape prepreg;

[0050] (2) The mold for the long row of hoods is processed and designed according to the product resistance deformation formula, and the angle between the high outward opening and its theoretical position is 1.5 degrees.

[0051] (3) After the mold is in place, carry out surface treatment and prepare the corresponding T700 / 603A carbon fiber unidirectional tape prepreg with a density ...

example 3

[0060] A method for manufacturing long-row hoods made of MT300 / 603 fiber and fabric sandwich composite materials. The cross-section of the long-row hoods involved in the method has a width of 236mm, a height of 180mm, and a length of 1292mm. PMI foam thickness 5mm; the method includes the following steps:

[0061] (1) The layering plan of the long row cover is {outer skin (MT300 / 603 carbon cloth) / D(90° / 0°)-PMI foam core material (thickness 5㎜)-reinforcement area (MT300 / 603 carbon cloth) 12 -Inner skin D(0° / 90°) / (MT300 / 603 carbon cloth)}; where, D is MT300 / 603 carbon fiber unidirectional tape prepreg;

[0062] (2) The mold for the long row of hoods is processed and designed according to the product resistance deformation formula, and the angle between the high outward opening and its theoretical position is 1.5 degrees.

[0063] (3) After the mold is in place, carry out surface treatment and prepare corresponding MT300-3K carbon cloth / 603, MT300 / 603 unidirectional prepreg with...

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Abstract

The invention discloses a preparation method for a long-row cover of a lightweight sandwich structure for a rocket. By selecting prepreg and foam suitable for the temperature load requirements of the rocket, a foam sandwich structure is adopted, and the preparation of the long-row cover is realized by using a layering process and a curing process. The invention can realize that the long-row cover satisfies the use conditions and at the same time reduces the weight by more than 20% compared with the composite material solution.

Description

technical field [0001] The invention adopts the composite material and the foam core material to make the sandwich composite long-row cover, and belongs to the field of non-metallic materials. Background technique [0002] During the flight phase of the rocket after launch, the cables, conduits and connecting devices installed on the surface of the booster, core first stage, and core second stage shells are designed to ensure the transmission of system signals, fuel supply and various components in a high temperature and high pressure environment. For the normal operation of the system, it is necessary to install a set of protective devices on the outside of the above lines / pipes—that is, long row covers. It provides a guarantee for the normal operation of the cables, conduits and other systems on the outside of the rocket shell. Long rows of hoods are usually made of aluminum, fiberglass or carbon-glass hybrid composites. [0003] In recent years, foam sandwich composite ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/86B29L31/30
Inventor 孙宝岗唐占文何析峻杨昆晓崔超孙宏杰
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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