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Tool and production method for producing variable cross-section type I-shaped composite part

A technology of composite materials and manufacturing methods, which is applied in the field of tooling and manufacturing for manufacturing variable cross-section I-shaped composite material parts, and can solve the problems of inability to successfully complete molding manufacturing, surface and internal defects of parts, and pressure transmission in the web area The effect is not good and other problems, to achieve the effect of avoiding tooling deformation and scrapping, good overall performance, and reducing the difficulty of tooling combination and demoulding

Active Publication Date: 2015-12-23
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for I-shaped and I-shaped parts with variable section thickness, if the above method is used, the forming and manufacturing of such parts will not be successfully completed.
This is because the variable cross-section tooling placed on the side does not have a good pressure transmission effect on the web area of ​​the workpiece, resulting in the generation of defects in the web area; it is not conducive to the demoulding process, and it is easy to cause surface and internal defects in the workpiece

Method used

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  • Tool and production method for producing variable cross-section type I-shaped composite part
  • Tool and production method for producing variable cross-section type I-shaped composite part
  • Tool and production method for producing variable cross-section type I-shaped composite part

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1 A kind of tooling for manufacturing variable-section I-shaped composite material parts

[0036] A tooling for manufacturing variable-section I-shaped composite material parts: it is composed of an upper male mold (100), a lower male mold (200) and a partition (300).

[0037] Such as image 3 As shown, the upper male mold (100) is an upper male mold main body of an integral structure composed of a main body part I (101), a positioning part I (102), a positioning part II (103) and a handle part (104).

[0038] Such as Figure 4 As shown, the lower male mold (200) is the main body of the lower male mold with an integral structure composed of the main body part II (201), the positioning part III (202), the positioning part IV (203) and the positioning pin (204) of the composite material equalizing plate, The main body of the lower male die is installed on the base plate (206), and the four corners of the lower male die (200) are provided with suspension rings...

Embodiment 2

[0041] Embodiment 2 A manufacturing method of a variable-section I-shaped composite material product

[0042] prepared as figure 1 and figure 2 The variable-section I-shaped composite material part shown is the I-shaped reinforcing rib in the rudder of a certain model, and the tooling of Embodiment 1 is adopted, and the steps are as follows:

[0043] 1) Making a composite equal pressure plate

[0044] The pressure equalizing plate is as follows: a carbon fiber layer is laid on a metal plate, and a rubber layer is pasted on the carbon fiber layer.

[0045] The steps to make a composite material uniform pressure plate are: laying carbon fiber prepreg on a metal plate, and using heating equipment to thermally compact the layup; after laying up, use a raw rubber belt of the same thickness for edge sealing around the blank to prevent The resin in the prepreg is excessively lost; put the blank into a vacuum bag, send it into an autoclave, and cure it at 120-180°C and 0.3-0.6MPa ...

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Abstract

The invention relate to a tool and production method for producing a variable cross-section type I-shaped composite part. According to the technical scheme, the tool is composed of an upper male die, a lower male die, a middle spacer plate and composite even pressing plates on the two sides. The production method comprises the steps that firstly, the composite even pressing plates are made; then, carbon fiber prepregs cut into fixed sizes are laid on a forming tool; finally all parts of the carbon fiber prepregs laid well are transferred from the forming tool to an assembly solidification tool for integral assembly, and packaged in a vacuum bag; the fully sealed prepreg blank is subjected to solidification forming under the conditions of 120-180 DEG C and 0.3-0.8 mpa for 1-3 hours; and after cooling, the composite even pressing plates, the middle spacer plate, the upper male die and the lower male die are detached to obtain the variable cross-section type I-shaped composite part. According to the production process, the pressure transmission efficiency of the part in the solidification process can be improved; generation of the structure defect of the part is reduced; the shape and the internal quality of the part are ensured.

Description

technical field [0001] The invention relates to a manufacturing process of composite material variable-section I-shaped parts, in particular to a manufacturing method for ensuring the internal and external quality of composite material variable-section I-shaped parts during the manufacturing process. Background technique [0002] Composite variable-section I-shaped parts belong to the main load-bearing structural parts, and are mainly used in aircraft rudders and wings. Such as figure 1 and figure 2 As shown, the variable cross-section I-shaped workpiece (400) generally has the following characteristics: the shape and structure of the workpiece are irregular, the size and thickness are uneven, the shape changes greatly, and the structural molding is difficult. [0003] In the prior art, the vacuum bag-autoclave method is mainly used to manufacture carbon fiber composite molded parts. The method is to lay the prepreg blanks on the rigid male mold to form a C-shaped struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44B29C70/54B29C33/00
CPCB29C33/00B29C70/44B29C70/543
Inventor 张运湘蒲永伟关振庞城德
Owner SHENYANG AIRCRAFT CORP
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