Three-dimensional integral weaving method for multi-directional preform

A technology of overall weaving and auxiliary tooling, which is applied in the direction of braids, textiles and papermaking, etc., to achieve the effects of wide adaptability, improving integrity and comprehensive performance, and reducing fiber damage

Inactive Publication Date: 2007-11-21
天津天纺特种复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the technical problem to be solved by the present invention is to design a three-dimensional overall weaving method for multi-directional preformed parts, which can realize complex shape compounding composed of two or more geometric bodies intersecting vertically. The three-dimensional overall weaving of the multi-directional preformed parts of the material support enables the reinforcing fiber bundles inside the part to penetrate through the components of different molding directions along different spatial orientations according to the design rules, and form a continuous non-layered The three-dimensional overall network structure improves the integrity of the workpiece structure and improves the mechanical properties of the geometric space connection parts, and the workpiece is a clean body shape, which does not need to be reprocessed after being made into a composite material. At the same time, the method is simple and has wide applicability.

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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  • Three-dimensional integral weaving method for multi-directional preform

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Effect test

Embodiment 1

[0033] Adopt the weaving method of the present invention to weave flat plate and vertical circular pipe joint parts (see Fig. 1) in two forming directions.

[0034] The main molding direction I of the product is designed as a flat part, and the second molding direction II is a round tube part. The rectangular width of the flat part is 53mm, the thickness is 5mm, and the length is 250mm; the inner diameter of the round tube part is 22mm, the outer diameter is 26mm, and the starting point of the round tube part is 60mm from the starting surface of the flat plate. The flat panel adopts four-step three-dimensional five-directional square weaving. The knitting yarn is T300-6K carbon fiber, the knitting angle is 20°, the knitting flower node length is 4.5 mm, and the number of yarns required for the design knitting is 605. Knit to the yarn adding position of the circular tube and start pre-feeding the yarn required for circular tube braiding. 350 yarns are used in the design of th...

Embodiment 2

[0037] Adopt the weaving method of the present invention to weave two forming direction T-shaped joint parts (referring to Fig. 2).

[0038] The main molding direction I and the second molding direction II of the product are both flat plate parts, but the two sizes are different. The width of the former plate is 25mm, the thickness is 5mm, the length is 350mm, and the length of the woven flower joint is designed to be 4mm; the section width of the latter plate is 20mm, the thickness is 5mm, the length is 200mm, and the length of the woven flower joint is designed to be 4mm. The two forming directions are perpendicular to each other. The main forming direction I (flat part) adopts four-step three-dimensional five-way square weaving, the weaving yarn is T300-12K carbon fiber, the weaving angle is 25°, and the number of yarns required for design weaving is 136. The second forming direction II (vertical part) adopts three-dimensional four-way weaving square weaving, the weaving y...

Embodiment 3

[0040] Adopt the method of the present invention to braid four round pipes in five forming directions and a box-shaped body to vertically connect joint parts (referring to Fig. 3 ).

[0041]The product takes the box-shaped body part as the main forming direction I, and adopts the box-shaped cross-section square weaving process; the round tubes on the four sides can be the second forming direction II or arranged in order of forming directions II, III, IV and V (See Figure 3), using a circular weaving process to weave. First, the initial section of the box-shaped body of the multi-directional product is used as the initial section of weaving, and the weaving yarn arrangement is designed according to the size and shape of the section. The weaving yarn is T700 12K carbon fiber, which is arranged in a box shape on the chassis of the machine. The weaving adopts the three-dimensional five-way weaving method, and the length of the flower node is 5mm; the round tube part uses the same ...

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 the tridimensional integral knitting method for multidirectional preformation work, comprising the following steps: on the base of four-step method three-dimensional four-way, five-way or above five-way square / circular braid weaving, braiding the first forming direction of multidirectional preformation work, at the mean time, at the vertical and intersect position, according to the requirement of geometric figure and braided rule, adopting adding wire and lead-in wire method to provide the all yarn of the second or other forming directions, then knitting the first forming direction part; transfering the braiding direction, leading out the provided yarn, adjusting the braided rule, knitting the part of second or other forming directions. The invention has the advantages of simple method, wide usage, improving the work monolithic structure and mechanical property.

Description

technical field [0001] The invention relates to a three-dimensional weaving technology, a three-dimensional weaving technology for preformed parts of composite material supports, in particular to a multi-dimensional weaving technology for making composite material supports of complex shape in which two or more geometric bodies intersect vertically in space. The three-dimensional overall weaving method for preformed parts and its auxiliary tooling, the international patent main classification number is proposed to be Int.Cl 7 D04C 1 / 00. Background technique [0002] The reinforced structure of the composite material or the shape structure and quality of the support body preform basically determine the performance of the composite material. The important form of high-performance advanced composite reinforced structure is the three-dimensional braided preform prepared by three-dimensional braiding technology. Its main features are: 1. The fiber bundles are interwoven and ori...

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): D04C1/00
Inventor 李嘉禄焦亚男陈利
Owner 天津天纺特种复合材料有限公司
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