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Co-curing composite material thin-wall fuel tank with omega-shaped frame body and forming method

A composite material and molding method technology, which is applied in the field of co-cured composite material thin-walled fuel tanks and molding, can solve the problems of insufficient load-bearing capacity at the connection position of the hanger of the composite fuel tank, and achieve light weight, strong load-bearing capacity of the hanger, and The effect of stable connection

Inactive Publication Date: 2021-07-13
TIANJIN ISTAR ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a co-cured composite material thin-walled fuel tank molding method with an Ω-shaped frame to alleviate the technical problem of insufficient load-bearing capacity at the connection position of the composite fuel tank hanger

Method used

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  • Co-curing composite material thin-wall fuel tank with omega-shaped frame body and forming method
  • Co-curing composite material thin-wall fuel tank with omega-shaped frame body and forming method
  • Co-curing composite material thin-wall fuel tank with omega-shaped frame body and forming method

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Embodiment 1

[0043] The technical problem to be solved in this embodiment is that in order to reduce the weight of the aircraft, a composite material fuel tank is designed and manufactured, which greatly reduces the weight of the fuel tank. The structural strength has very high requirements, and the existing composite material fuel tank has insufficient structural stability, especially the insufficient load-bearing capacity at the connection position of the pylon of the fuel tank.

[0044] In order to solve the above technical problems, such as figure 1 As shown, the present embodiment provides a molding method of a co-cured composite material thin-walled fuel tank with an Ω-shaped frame, comprising the following steps:

[0045] S110: building a detachable rigid mold;

[0046] S120: setting the Ω-shaped frame body on the rigid mold, laying the molding material of the Ω-shaped frame body in the Ω-shaped frame body, inserting the Ω-shaped frame body forming mold 30 and obtaining the fuel ta...

Embodiment 2

[0052] This embodiment provides a molding method of a co-cured composite material thin-walled fuel tank with an Ω-shaped frame, comprising the following steps:

[0053] S210: Build a detachable rigid mold, and the outer side of the rigid mold can be built or disassembled;

[0054]S220: Set the Ω-shaped frame on the rigid mold, the position of the Ω-shaped frame is set at the connection position of the hanger of the fuel tank body, the molding material of the Ω-shaped frame is laid in the Ω-shaped frame, and the Ω-shaped frame is inserted into the Ω-shaped frame. Type frame forming mold 30 and obtain fuel tank mandrel;

[0055] S230: Lay the prepreg on the surface of the fuel tank mandrel, and continue to thicken and lay it at the connection position of the hanger; lay the prepreg fabric layer 20 along the outside of the Ω-shaped frame forming mold 30 and the outside of the molding auxiliary material, the said The prepreg fabric layer 20 includes at least two layers, and the w...

Embodiment 3

[0064] The present invention also provides a thin-walled fuel tank of co-cured composite material with an Ω-shaped frame, such as image 3 shown, including:

[0065] The rigid mold module 100 is used to build a detachable rigid mold;

[0066] The Ω-shaped mold module 200 is used to set the Ω-shaped frame on the rigid mold, lay the molding material of the Ω-shaped frame in the Ω-shaped frame, insert the Ω-shaped frame forming mold 30 and obtain the fuel tank mandrel;

[0067] The first impregnation module 300 is used to lay the prepreg on the surface of the fuel tank mandrel;

[0068] The second impregnating material module 400 is used to lay the molding auxiliary material on the outside of the Ω-shaped frame forming mold 30 and be flush with the prepreg on the surface of the fuel tank mandrel;

[0069] The forming module 500 is used for encapsulating the product through a flexible mold, and removing the flexible mold after hot pressing and curing to obtain a fuel tank body w...

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Abstract

The invention provides a co-curing composite material thin-wall fuel tank with an omega-shaped frame body and a forming method, and relates to the technical field of aviation aircraft lightweight. The forming method comprises the following steps that 1, a detachable rigid mold is built; 2, an omega-shaped frame is arranged on the rigid mold, and prepreg is laid on the surface of a fuel tank core mold; 3, auxiliary materials are laid at the outer side of an omega-shaped frame forming mold and are flush with the prepreg on the surface of the fuel tank core mold; and 4, product packaging is conducted through a flexible mold, the flexible mold is removed after hot pressing curing, and a fuel tank body with the omega-shaped frame body is obtained. According to the forming method, under the condition that the fuel volume is guaranteed, the overall structural strength of the connecting position of a hanging frame is improved, the omega-shaped frame body and the overall fuel tank body are formed by adopting similar or same materials, and the stability, reliability and overall bearing strength of the local structure of the fuel tank are improved through co-curing forming; The forming method is simple in process and low in forming cost, and greatly reduces the overall assembly cost and the production cycle of the thin-wall fuel tank.

Description

technical field [0001] The invention relates to the technical field of lightweight aircraft, in particular to a co-cured composite material thin-walled fuel tank with an Ω-shaped frame body and a molding method. Background technique [0002] Fuel tanks are an important part of aviation aircraft. With the increase of aviation weight requirements for aircraft, higher demands are placed on aircraft fuel tanks. [0003] Since the existing fuel tank is made of metal material, resulting in a relatively heavy weight, the present application proposes to use a composite material to reduce the weight of the fuel tank. At present, there are researches involving composite fuel tanks at home and abroad, but the existing composite fuel tanks use a honeycomb sandwich structure for the tank wall, but this application proposes a thin-walled composite fuel tank structure for the first time. [0004] In order to reduce the weight of the aircraft, a composite material fuel tank was designed an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54
CPCB29C70/342B29C70/54
Inventor 王非季宝锋丁常方麻永帅高岩刘发杰
Owner TIANJIN ISTAR ADVANCED MATERIAL TECH CO LTD
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