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Method for forming grid structure composite material component

A composite material component and grid structure technology, applied in the aviation field, can solve the problems of difficult molding, complex structure, and failure to produce successfully, and achieve the effects of weight reduction, high dimensional accuracy, and cost reduction

Inactive Publication Date: 2020-04-03
JIANGSU XINYANG NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Composite materials with grid structure are often selected in structural design. They have the characteristics of high strength and high stiffness. Due to their complex structure, composite materials with grid structure have certain difficulties in forming, and cannot be formed by a single forming method. produce it successfully

Method used

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  • Method for forming grid structure composite material component
  • Method for forming grid structure composite material component

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Embodiment Construction

[0029] As shown in the figure, a method for forming a grid structure composite member includes the following steps:

[0030] Step 1: The grid structure is formed in partitions, using the autoclave process to separately form multiple frames and side wall panels 4, the multiple frames include 6 closed back frames and 1 C-shaped frame, and 6 closed back frames It includes five first typical frames 1 and one second typical frame 2, the C-shaped frame is the third typical frame 3, and the side wall panels 4 are U-shaped side wall panels. Grid structure partition molding specifically includes: using vacuum bag autoclave preforming process, using unidirectional prepreg to prefabricate the first typical frame 1 according to the designed layup sequence, the first typical frame 1 is a closed structure, using butt layup Form, the joints need to be staggered, vacuum once every 5 layers, compact and discharge air bubbles, make bags and put them into autoclave for final curing;

[0031] Ma...

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Abstract

The invention discloses a method for forming a grid structure composite material component, which comprises the following steps: 1, forming the grid structure based on various areas, and separately forming a plurality of frames and a side wall plate independently by an autoclave process; 2, bonding the plurality of frames and the side wall plate into a whole through a bonding tool; 3, detecting the position relation among the frames after the bonding, and confirming that the sizes of the frames meet the requirements of a drawing; 4, performing R corner filling on the frames and between the frames and the side wall plate by a mold pressing process; 5 wrapping the plurality of frames and the side wall plate together by a wrapping material; 6, placing the wrapped frames and side wall plate into an RTM glue injection mold for glue injection; 7, placing the mold subjected to glue injection into a baking oven for curing; and 8, demolding to obtain the grid structure composite material component. The method ensures the size of a product by an RTM mould cavity, basically does not need machining, and achieves high size precision. The surface of the product is a film attaching surface, so that while the product strength and rigidity are met, the weight of the product is obviously reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of aviation technology, in particular to a forming method of a grid structure composite material component. Background technique [0002] The use of advanced composite materials in aerospace structures can reduce weight by 20-30%, which is an effect that other advanced technologies cannot achieve. Therefore, it is widely used in the field of aerospace. One of the largest aerospace structural materials. [0003] Carbon fiber reinforced material is a landmark product in the field of composite materials. It has the advantages of anisotropy (designable), high specific strength, high specific modulus, corrosion resistance, fatigue resistance, etc., so that it has good flexibility in design , can reduce the weight of the structure under the premise of satisfying the stiffness, strength and fatigue performance, and has obvious advantages in the field of aerospace structure design. [0004] Composite materials with grid str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/48B29C70/54B29C70/44B29C35/02B29C35/00B29C65/48
CPCB29C35/007B29C35/02B29C65/48B29C70/443B29C70/48B29C70/54
Inventor 张林张兰张彬李俊
Owner JIANGSU XINYANG NEW MATERIALS CO LTD
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