A method for in-situ weaving additive manufacturing of continuous fiber reinforced composites

A reinforced composite material and continuous fiber technology, which is applied in the direction of manufacturing tools, additive manufacturing, additive processing, etc., can solve the problems of difficult realization of complex structures, complex processes, bonding strength between material layers, and performance anisotropy, so as to save the effect of time

Active Publication Date: 2020-02-14
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the lamination / winding process is relatively simple and has a wide range of applications, but there are problems such as low bonding strength between material layers and anisotropy of properties.
The weaving process uses the weaving method to make a three-dimensionally distributed fiber prefabricated body, and then uses hot pressing and other methods to impregnate the resin to obtain a composite material, which can manufacture components with balanced material properties, but the fiber weaving process is complicated, and it is difficult to realize the manufacture of complex structures
[0003] In recent years, researchers have invented additive manufacturing methods for continuous fiber composites (Xiaoyong Tian et al. Chinese patent ZL2014103256503, 2014; Zhongde Shan et al. Chinese patent CN106515041A, 2017; Patent CN107127972A, 2017), which solves the problems of traditional continuous fiber composite materials such as the need for molds, complex processes, and difficult realization of complex structures
However, the existing additive manufacturing methods of composite materials are all based on the lamination / winding process, and there are still problems such as bonding strength between material layers and performance anisotropy.

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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  • A method for in-situ weaving additive manufacturing of continuous fiber reinforced composites
  • A method for in-situ weaving additive manufacturing of continuous fiber reinforced composites
  • A method for in-situ weaving additive manufacturing of continuous fiber reinforced composites

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, for slender thin-walled parts, refer to figure 1 , figure 2 and image 3 , an in-situ weaving additive manufacturing method for continuous fiber reinforced composites, comprising the following steps:

[0026] a) Hierarchically discretize the data of the three-dimensional component: the thin-walled part 9 to be printed is dimensioned as a thin-walled part with a length of 100mm and a height of 50mm, and the wall thickness is the width of the extruded resin under a single scanning track ; The material is PLA composite continuous carbon fiber material, and the three-dimensional data of the slender thin-walled part 9 is discretely processed by commercial software, and the path is planned and the printing parameters are formulated: the printing path is a single-track reciprocating linear scanning method, and the layer thickness is 0.5 mm(0.2mm-0.5mm), scanning distance 1.6mm(0.4mm-1.6mm), scanning speed 2mm / s(1mm / s-5mm / s), printing temperature 220℃;

[0027...

Embodiment 2

[0031] Embodiment 2, for circular thin-walled parts, refer to figure 1 and Figure 4 , an in-situ weaving additive manufacturing method for continuous fiber reinforced composites, comprising the following steps:

[0032] a) Hierarchically discretize the data of the three-dimensional component: set the size of the ring-shaped thin-walled part 10 to be printed as a thin-walled part with a diameter of 80mm and a height of 50mm, and the wall thickness is the width of the extruded resin under a single scanning track ; The material is PLA composite continuous carbon fiber material, and after the three-dimensional data of the ring-shaped thin-walled part 10 is discretely processed by commercial software, the path is planned and the printing parameters are formulated: the printing path is a single-track reciprocating linear scanning method, and the layer thickness is 0.5 mm, scanning distance 1.6mm, scanning speed 1mm / s, printing temperature 220℃;

[0033]b) Pre-grouping and pre-sha...

Embodiment 3

[0037] Embodiment 3, for multi-track scanning thick-walled parts, refer to figure 1 and Figure 5 , an in-situ weaving additive manufacturing method for continuous fiber reinforced composites, comprising the following steps:

[0038] a) Layering and discretizing the data of the three-dimensional components: the multi-track scanning thick-walled part 11 to be printed is dimensioned as a cuboid-shaped part with a length of 50 mm, a width of 15 mm, and a height of 5 mm. The material is PLA composite continuous carbon fiber material. After the three-dimensional data of the solid component is discretely processed, the path is planned and the printing parameters are formulated: the printing path is a reciprocating linear scanning method, the layer thickness is 0.5mm, the scanning distance is 1.0mm, the scanning speed is 1mm / s, and the printing temperature is 210°C;

[0039] b) Pre-grouping and pre-setting the fibers to be woven: for the thick-walled multi-track scanning of the thic...

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 an in-situ weaving additive manufacturing method of a continuous fiber reinforced composite material. The in-situ weaving additive manufacturing method of the continuous fiberreinforced composite material comprises the steps of firstly layering and scattering data of a three-dimensional component, and obtaining manufacturing data required for printing and weaving; then pre-grouping and pre-setting fiber yarns to be woven; utilizing a continuous fiber reinforced composite material printing technology for accomplishing printing, and forming a printing layer; when a nozzle is moving, quickly weaving on an uncured path at the rear end of the nozzle through a thread guider at the same time, dipping and curing the fiber yarns through a resin in a mixture at the time, and forming a weaving layer on the printing layer; repetitively printing and weaving until achieving the thickness of a target sample layer, and accomplishing an integrated manufacturing process for printing and weaving a target sample. According to the in-situ weaving additive manufacturing method of the continuous fiber reinforced composite material provided by the invention, integration and unification of high-performance continuous fiber reinforced composite material component printing forming and fiber weaving processes are realized, all-directional performances of the component is realized, and particularly, the controllability of an interlayer bonding performance in a z direction is realized.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, and in particular relates to an in-situ weaving additive manufacturing method of continuous fiber reinforced composite materials. Background technique [0002] Continuous fiber-reinforced composite materials are an important support for aerospace, national defense and military industries, and their usage has become an important indicator to measure the advanced level of related fields, and their manufacturing technology is the key. At present, according to the structure, the manufacturing technology of continuous fiber reinforced composite materials includes lamination / winding process and weaving process. Among them, the lamination / winding process is relatively simple and has a wide range of applications, but there are problems such as low bonding strength between material layers and anisotropy of properties. The weaving process uses the weaving method to make a three-dimensional...

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 Patents(China)
IPC IPC(8): B29C64/171B33Y10/00
CPCB33Y10/00
Inventor 朱伟军尚俊凡田小永罗盟李涤尘
Owner XI AN JIAOTONG UNIV
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