A method for manufacturing a combined pressure equalizing cover plate suitable for forming c-shaped composite material parts

A composite material and manufacturing method technology, which is applied in the field of combined pressure equalizing cover plates for forming composite material parts, can solve the problems of poor internal quality of parts, difficult to guarantee the thickness of the rounded area, and many wrinkles, etc. Excellent quality, accurate results in rounded and non-rounded areas and dimensions

Active Publication Date: 2017-03-15
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the problems of C-shaped composite parts manufactured by traditional methods are: the thickness of the fillet area is difficult to ensure, and there are many wrinkles at the same time; the internal quality of the part is often poor due to the unsmooth pressurization of each part during the curing process of the autoclave ; Poor appearance quality

Method used

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  • A method for manufacturing a combined pressure equalizing cover plate suitable for forming c-shaped composite material parts
  • A method for manufacturing a combined pressure equalizing cover plate suitable for forming c-shaped composite material parts
  • A method for manufacturing a combined pressure equalizing cover plate suitable for forming c-shaped composite material parts

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Embodiment 1

[0016] Example 1 A manufacturing method of a combined pressure equalizing cover plate suitable for forming C-shaped composite material parts

[0017] Take the L-type equalizing cover plate used with the female mold forming mold as an example, the method is as follows:

[0018] 1) Such as image 3 As shown, the process surface (2) of the female mold forming mold (1) that has the same shape as the C-shaped composite material part is obtained;

[0019] 2) Based on the process surface (2), both sides are simultaneously symmetrically laid, with a single layer of carbon fiber fabric prepreg A with a thickness of 0.2mm and a single layer of carbon fiber fabric prepreg B with a thickness of 0.6mm as the layup Material, laying P1~P6 total 6 layers;

[0020] 3)Layer design:

[0021] Laying sequence is: carbon fiber fabric prepreg A is used for the first layer P1 and final layer P6, and carbon fiber fabric prepreg B is used for the remaining P2~P5 layers;

[0022] Laying angles are: in the order o...

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Abstract

The invention relates to a manufacture method of a combined pressure-equalizing cover board suitable for molding C-shaped composite material parts. The adopted technical scheme is as follows: obtaining a technique surface; laying up carbon fiber fabric prepreg A with the single-layer thickness of 0.2mm and carbon fiber fabric prepreg B with the single-layer thickness of 0.6mm on the technique surface, selecting wherein for the first layer and the final layer and selecting carbon fiber fabric prepregs B for other layers, laying laying alternatively and symmetrically towards two sides at 0-degree and 45-degree by taking the middle layer as the center, and retracting each layer by 10-15mm; and laying with the finaly layer after circling the carbon fiber fabric prepreg B into a circle and filling; and encapsulating the paved pressure-equalizing cover board blank, vacuumizing and molding in a hot-pressing tank. The manufacture method is suitable for molding the composite material parts with C-shaped cross section based on the hand laying-up, vacuum bag and hot-pressing tank method in an auxiliary manner and can ensure the fillet quality.

Description

Technical field [0001] The invention belongs to the technical field of composite material molding, and specifically relates to a combined pressure equalizing cover plate suitable for molding composite material parts with a C-shaped cross section. Background technique [0002] Hand lay-up-vacuum bag-autoclave molding is a molding method widely used in aviation advanced composite parts. This method uses vacuum bag packaging to form a vacuum system after manually laying the blanks, and then vacuumizes the low-molecular volatiles contained in the prepreg and the inclusions in the prepreg In the end, composite parts with qualified internal quality are obtained. When the traditional method is used for molding, a single-sided mold is used, so the surface quality and surface size of the mold surface can be guaranteed by the mold, but the controllability of the shape and surface quality is poor. The rounded corners of non-planar parts manufactured by hand lay-up-vacuum bag-autoclave met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/44
CPCB29C70/342
Inventor 孟庆杰蒲永伟张旺
Owner SHENYANG AIRCRAFT CORP
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