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Three-dimensional integral weaving method for grid type prefabricated part and product thereof

A technology of integral weaving and prefabrication, which is applied in the direction of woven fabrics, textiles and papermaking, can solve the problems of weak structural strength and rigidity of grid ribs, poor shear resistance, etc., to improve integrity and comprehensive performance, reduce weight, The effect of avoiding fiber damage

Inactive Publication Date: 2011-05-04
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of these types of grids are: poor shear resistance, and weak areas of structural strength and rigidity appear at the slots of the grid ribs

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 grid type prefabricated part and product thereof
  • Three-dimensional integral weaving method for grid type prefabricated part and product thereof
  • Three-dimensional integral weaving method for grid type prefabricated part and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The weaving method of the prefabricated part whose grid shape is an equilateral triangle (see figure 1 ).

[0033] The cross-section of the triangular grid preform is rectangular, the size is 100*15mm, the weaving structure adopts a three-dimensional five-way structure, the weaving yarn is 1200tex glass fiber, the weaving angle is 30°, and the number of yarns required for design weaving is 780. Among them, there are 520 weaving yarns and 260 axial yarns; according to the shape required by the grid, 60 yarns are designed for each layer, of which 40 are weaving yarns and 20 axial yarns. All the yarns are divided into 13 layers, represented by 1-13 respectively; all yarn layers are divided into 7 parts, initially according to (1, 2) (3) (4, 5, 6) (7) (8, 9, 10) (11) ( 12, 13) Hanging yarn; according to the hanging yarn combination, weave 6 flower node lengths (the flower node length refers to the length of the prefabricated part woven by one machine cycle) as the starting...

Embodiment 2

[0035] The weaving method of the prefabricated part whose grid shape is rhombus (see figure 2 with 4 ).

[0036] The diamond grid weaving structure adopts a three-dimensional four-way structure, the weaving yarn is 1200tex glass fiber, and the number of yarns required for weaving is designed to be 720; according to the shape required by the grid, each layer of yarns is designed to be 60, and all yarns The thread is divided into 12 layers, represented by 1-12 respectively; the initial part is weaved according to (1, 2) (3, 4) (5, 6) (7, 8) (9, 10) (11, 12) combination 8 node as the starting position A. Then ①all the yarn layers are separated, and each yarn layer is woven separately, and each yarn layer is woven with 4 flower nodes; ②according to (1)(2,3)(4,5)(6,7)(8 , 9) (10, 11) (12) Combining weaving a flower node, and exchanging part of the yarns between the two connected yarn layers to improve the mechanical properties at the intersection of the grid; ③All the yarn laye...

Embodiment 3

[0038] The weaving method of the prefabricated part whose grid shape is square or rectangular (see figure 2 ).

[0039] The square grid weaving structure adopts a three-dimensional six-way structure, and the weaving yarn is 12K carbon fiber. All the yarns are designed to be divided into 8 layers, which are respectively represented by 1-8. When hanging yarn, according to (1) (2, 3) (4, 5) (6, 7) (8) combination, weave 7 flower node lengths as the starting position A; then ① weave the corresponding length for each yarn layer; ② Combination knitting according to (1, 2) (3, 4) (5, 6) (7, 8); ③ All yarn layers are separated, and each yarn layer is knit separately; ④ Press (1) (2, 3) (4, 5) (6, 7) (8) combined weaving corresponding length. Repeat the above four weaving steps ①~④, and all the weaving yarns participate in weaving until the weaving is finished, and the overall weaving of the square grid prefabricated part is completed. The grid shape of the square prefabricated pro...

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 three-dimensional integral weaving method for a grid type prefabricated part and a product thereof. The weaving method is based on three-dimensional four-directional, five-directional or six-directional square braiding technology by a four-step method to weave a grid part, and comprises the steps of: firstly, dividing needed yarns into certain layers during the yarn hanging according to the external dimension of the grid type prefabricated part and the change law of grid shape, and designing the corresponding quantity of axial units according to the side length of agrid; secondly, during the weaving, performing layer connection weaving and layered weaving according to the change law on a corresponding yarn carrier array on a chassis of a knitting machine according to the quantity of the axial units; and finally, repeating the weaving until the weaving is finished. The product of the grid type prefabricated part is directly prepared by the weaving method.

Description

technical field [0001] The invention relates to a three-dimensional integral weaving technology, in particular to a three-dimensional integral weaving method for a grid-type prefabricated part of a composite material reinforcement and its products. Background technique [0002] In engineering applications, the ratio of structural performance to weight is an important indicator to measure the quality of materials. Lightweight is the basic requirement of aerospace composite materials and structures, and low-cost technology is a prerequisite for the wide application of any composite material structure. Advanced Composite Grid Structure (AGS) is a composite lattice structure closest to practicality. Since it was first proposed by Stanford University in the 1990s, with its strong designability and A variety of excellent performance and widely concerned. Its advantages are: (1) It has excellent properties such as high specific strength and high specific modulus of composite mate...

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): D04C1/00D04C1/06
Inventor 焦亚男陈利李嘉禄
Owner TIANJIN POLYTECHNIC UNIV
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