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Low-wear three-dimensional forming method for Z-directional fibers of composite material

A three-dimensional forming, composite material technology, applied in the direction of fabrics, textiles, textiles and papermaking, can solve the problems of reducing the comprehensive properties of composite materials, reducing the reinforcement effect of Z-direction fibers, and the wear of Z-direction fibers and in-plane fibers. The effect of clustering and stiffness, ensuring comprehensive performance and high structural stability

Active Publication Date: 2019-05-10
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main difference between the above three-dimensional forming methods of composite materials is the introduction of Z-direction reinforcements. Among them, the three-dimensional weaving and three-dimensional weaving methods all introduce X, Y, and Z three-dimensional fibers at the same time. Different from the realization of the forming of the three-dimensional structure composite material preform, the Z-direction fibers are in the state of tow, which is soft and easy to weave into shape. Therefore, the Z-direction fibers will form an interlocking structure with the X and Y-direction fibers, making the Z-direction fibers Local buckling, reducing the reinforcement of the Z-direction fibers
The methods of fine-knitting puncture, suture, and needle punching use external force to place Z-direction fibers into the preform, and the Z-direction fibers are not directly connected to the in-plane fiber layer, thereby reducing the integrity of the preform after forming. At the same time, The Z-direction fibers are all subsequently introduced into the in-plane fiber layer. When the Z-direction fiber penetrates the in-plane fiber layer, it is very easy to cause wear of the Z-direction fiber and the in-plane fiber, and finally reduces the reinforcing effect of the fiber, thereby reducing the strength of the composite material. Comprehensive performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Effect test

Embodiment Construction

[0024] The specific steps of the composite material Z-direction fiber low-wear three-dimensional forming method of the present invention are as follows:

[0025] a) Select the three-dimensional structural composite material parts that need to be prepared, establish the structural model of the parts based on the size and performance requirements of the parts to be prepared, and select the X and Y direction fibers to be 3K carbon fibers, and the Z direction fibers to be 12K carbon fiber;

[0026] b) Wrap the outer layer of the Z-direction fiber with a mixed water solvent of 4% polyvinyl alcohol (the auxiliary agent is a silicone finishing agent), and after curing, obtain a Z-direction fiber with a certain degree of stiffness, and the diameter of the Z-direction fiber is 1.2mm ;

[0027] c) Give each pretreated Z-direction fiber bundle a tension force of 5N-10N, and then fix the Z-direction fibers with a certain tension force on the guide array support to construct a Z-direction...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a low-wear three-dimensional forming method for Z-directional fibers of a composite material. The method comprises the following steps: coating the outer layers of the Z-directional fibers with slurry to construct a wear-resistant Z-directional array which is good in bundling property; arranging the X- and Y-directional fibers along X- and Y-directional gaps of the array according to a structural model of a prepared part and compacting a woven layer in stages; and after weaving and forming a prefabricate, removing the slurry from the outer layers of the fibers in the prefabricate to obtain the three-dimensional composite material prefabricate which is high in compactness, good in comprehensive performance and high in structural stability. The bundling property andthe stiffness of the Z-directional fiber bundle are improved by means of the low-wear three-dimensional forming method for Z-directional fibers of the composite material, so that the Z-directional array formed by the Z-directional fiber bundle has higher structural stability, and meanwhile, wear of the Z-directional fiber bundle is reduced by being coated by surface slurry, so that the comprehensive performance of the composite material prefabricate is ensured.

Description

technical field [0001] The invention relates to the technical field of composite material prefabricated body manufacturing, in particular to a low-wear three-dimensional forming method for Z-direction fibers of composite materials. Background technique [0002] Dimensional composite materials have the advantages of high damage tolerance, good interlayer performance, strong crack growth resistance, and flexible structural design, and are widely used in cutting-edge fields such as aerospace and national defense. At present, the forming methods of three-dimensional composite materials mainly include quasi-three-dimensional forming methods such as three-dimensional weaving, three-dimensional weaving, fine weaving, puncture, suture, and acupuncture. The main technical method is to introduce a third-dimensional reinforcement in the Z direction of the composite material, which can effectively Improve the interlayer bonding strength of composite materials. [0003] The most importa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D25/00
Inventor 刘丰单忠德吴晓川杜悟迪侯卓健
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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