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A sewing method and shaping mold of a carbon fiber box-shaped prefabricated part

A technology for shaping molds and prefabricated parts, which is applied to the sewing method of carbon fiber box-shaped prefabricated parts and the field of shaping molds and resin-based composite materials. It can solve problems such as difficulty in ensuring box-shaped prefabricated parts, poor dimensional stability, and high dimensional accuracy. Achieve the effects of ensuring dimensional accuracy and stability, easy disassembly and assembly, and high fiber volume content

Active Publication Date: 2016-10-05
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the box-shaped prefabricated parts are easily deformed during the sewing process, and the dimensional stability after sewing is poor, it is difficult to ensure the high dimensional accuracy of the box-shaped prefabricated parts, and there is a bottleneck in practical application
Within the scope of the applicant's search, there is no literature report on the sewing technology of carbon fiber box-shaped structural prefabricated parts

Method used

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  • A sewing method and shaping mold of a carbon fiber box-shaped prefabricated part
  • A sewing method and shaping mold of a carbon fiber box-shaped prefabricated part
  • A sewing method and shaping mold of a carbon fiber box-shaped prefabricated part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] The carbon fiber rectangular box prefabricated part of 150mm * 100mm is made by adopting the sewing method of the present invention and the shaping mold, and the specific requirements are: (1) the fiber volume content is higher than 50%; (2) the thickness of the bottom of the prefabricated part and The thickness of the four side walls is 15mm; (3) The height of the side wall is 55mm; (4) The suture needle distance and line distance are 5mm; (5) The ply angle is [0°, 90°]; (6) This prefabricated Parts are used for carbon / carbon composite materials, and the performance requirements of each side wall are basically the same; (7) Seam requirements: 2 strands of T300 carbon fiber. The structural dimensions of this prefabricated part refer to figure 1 shown.

[0101] The sewing process of the carbon fiber box type prefabricated part designed by the present invention specifically comprises the following steps (see figure 2 ):

[0102] First, according to the thickness and a...

Embodiment 2

[0125] A carbon fiber rectangular box preform with a bottom size of 150 mm×100 mm is produced by using the sewing method and the shaping die described in the present invention, the bottom thickness of the preform is 15 mm, and the side wall thickness is 10 mm. The height of the side wall is 55mm, the thickness of a single layer of carbon fiber cloth is 0.33mm, and the sewing stitch and line spacing are 5mm. The ply angle is [0°,90°].

[0126] Analysis: The difference between the requirements of this box-shaped prefabricated part and that of Example 1 is that the side wall is thinner than the bottom, so the side wall needs to be removed by 5 divided by 0.33 to be 15 layers of carbon cloth. The main difference from the sewing method of the example is Two steps: sewing the side wall area of ​​the base and the three-dimensional wrapping box-type prefabricated part in a partially penetrating manner.

[0127]Partially penetrate the sidewall area of ​​the bottom: In this step, the l...

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Abstract

The invention discloses a sewing method and a shaping mould of a carbon fiber box-type prefabricated member. The sewing method comprises the following steps of firstly, cutting a carbon fiber cloth and laying up according to the design size and laminated angle of the box-type prefabricated member; secondly, seaming the bottom of the inner cavity of the box-type prefabricated member in a completely-penetrating mode; then seaming the bottom corresponding to the side wall of the box-type prefabricated member in a partly-penetrating mode; thirdly, packing the two-dimensional structured carbon fiber cloth into a three-dimensional box-type structure by utilizing a shaping core mould; fourthly, spraying distilled water uniformly on the box-type prefabricated member to drench the prefabricated member, and heating and preforming the prefabricated member by using the shaping mould; fifthly, seaming the side walls of the prefabricated member in a completely-penetrating mode; sixthly, spraying distilled water uniformly on the box-type prefabricated member again so as to drench the prefabricated member, and then heating and shaping the prefabricated member by using the shaping mould to obtain the carbon fiber box-type prefabricated member. The shaping mould comprises a shaping outer mould and the shaping core mould, the shaping core mould is a box-type body formed by connecting three components, and the shaping outer mould is a cube-type body formed by connecting six plate-type bodies.

Description

technical field [0001] The invention relates to the preparation technology of composite material prefabricated parts, specifically a sewing method and a shaping mold of a carbon fiber box-shaped prefabricated part. The prefabricated part has a semi-open shape and is mainly used for carbon / carbon composite materials and ceramic matrix composite materials. It can also be applied to resin-based composite materials. Background technique [0002] Traditional two-dimensional laminated composite materials have good in-plane mechanical properties, but there is no fiber reinforcement between the layers, and only the matrix resin plays the role of bonding and transmitting loads, so it is perpendicular to the direction of the layup and between the layups. performance is relatively weak. When subjected to external loads, the laminated composite material often produces interlaminar damage first, and the low interlaminar strength of the composite material also leads to poor damage resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C33/00B29C33/10
Inventor 王晓旭蒋云陈利焦亚男
Owner TIANJIN POLYTECHNIC UNIV
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