Manufacturing method of 2.5D asynchronous, reverse and irregular three-dimensional fabric

Abstract

The invention discloses a manufacturing method of a 2.5D asynchronous, reverse and irregular three-dimensional fabric. The 2.5D asynchronous, reverse and irregular three-dimensional fabric is characterized in that the middle is tubular, and geometric shapes extend from two ends of the tubular middle, and a 2.5D structure is adopted. The method comprises the steps of setting a central line of the 2.5D asynchronous, reverse and irregular three-dimensional fabric in the length direction as a weaving starting position; setting one end of the 2.5D asynchronous, reverse and irregular three-dimensional fabric in the length direction as the end A and the other end as the end B; weaving from the weaving starting position to the end A, so as to finish the first molding; weaving from the starting position to the end B after the end A is worn so as to finish the second molding; when weaving from the end B of the 2.5D asynchronous, reverse and irregular three-dimensional fabric, a triangular low-density area caused by secondary molding at the starting position is filled by the compensating type weft insertion process. The 2.5D asynchronous, reverse and irregular three-dimensional fabric manufactured by the method is integrally molded and has the characteristics of being high in uniformity, and relatively high in dimension volume fractions.

Description

technical field

[0001] The invention belongs to the field of fabric weaving, and in particular relates to a method for manufacturing a 2.5D asynchronous three-dimensional fabric with different orientations. Background technique

[0002] The three-dimensional fabric with special-shaped structure belongs to the technical field of new materials. It has the characteristics of complex shape and variable size. The reinforced composite material has high strength, high modulus, high damage tolerance, good fracture toughness, impact resistance, not easy A series of advantages such as fatigue have become a research hotspot in composite material technology. The three-dimensional fabric composite material with special-shaped structure can meet the weight reduction requirements of high-performance composite materials, and can realize light weight and miniaturization of materials and excellent mechanical properties. At present, the demand for special-shaped fabrics in China is increasing...

Examples

Embodiment 1

[0040] Embodiment 1: H-shaped band flanging tubular three-dimensional fabric (symmetric type)

[0041] combine figure 1 , image 3 with Figure 4 The instructions are as follows: Set the thickness of the fabric cylinder and large flange to 1.8mm, the thickness of the small flange to 3.0mm, the number of warp layers for the cylinder and large flange to be 8 layers, add 5 layers of warp yarns to the small flange, and the warp density to 10.0 / cm, the weft density is 2.0 / cm.

[0042] Calculated according to formula 1 and formula 2: the side length of the triangle c=0.13mm, which is less than (1 / w=1 / 2), the triangle area can be ignored, that is, it does not need to be filled with a compensating weft inserting process.

[0043] Set the center line in the length direction of the three-dimensional fabric as the starting position, such as figure 1 As shown, the part below the starting position is the B segment fabric (along the B direction), and the part above the starting positio...

Embodiment 2

[0074] Embodiment 2: Schematic diagram of H-shaped tubular fabric with flanging (similar symmetrical type)

[0075] combine figure 2 , image 3 with Figure 4 The instructions are as follows: set the thickness of the fabric to be 12mm, the number of warp layers to be 20, the density in the warp direction to be 9.5 threads / cm, the density in the weft direction to be 3.0 threads / cm, and the angle between the beveled flanging and the cylinder to be 88 degrees.

[0076] Calculated according to Formula 1 and Formula 2: the side length of the triangle c = 0.86mm, greater than (1 / w = 1 / 3), the triangle area needs to be filled with a compensating weft insertion process; calculated according to Formula 3 to Formula 6 : M=2.57 is rounded to 3, N 1 =6.7 rounded to 7, N 2 =13.3 is rounded to 13. Therefore, the number of weft insertion layers in the triangular low-density area is 13 layers, and the weft number is 2 latitudes. Since the included angle between the descending flanging ...

technical field

[0001] The invention belongs to the field of fabric weaving, and in particular relates to a method for manufacturing a 2.5D asynchronous three-dimensional fabric with different orientations. Background technique

[0002] The three-dimensional fabric with special-shaped structure belongs to the technical field of new materials. It has the characteristics of complex shape and variable size. The reinforced composite material has high strength, high modulus, high damage tolerance, good fracture toughness, impact resistance, not easy A series of advantages such as fatigue have become a research hotspot in composite material technology. The three-dimensional fabric composite material with special-shaped structure can meet the weight reduction requirements of high-performance composite materials, and can realize light weight and miniaturization of materials and excellent mechanical properties. At present, the demand for special-shaped fabrics in China is increasing...

Examples

Embodiment 1

[0040] Embodiment 1: H-shaped band flanging tubular three-dimensional fabric (symmetric type)

[0041] combine figure 1 , image 3 with Figure 4 The instructions are as follows: Set the thickness of the fabric cylinder and large flange to 1.8mm, the thickness of the small flange to 3.0mm, the number of warp layers for the cylinder and large flange to be 8 layers, add 5 layers of warp yarns to the small flange, and the warp density to 10.0 / cm, the weft density is 2.0 / cm.

[0042] Calculated according to formula 1 and formula 2: the side length of the triangle c=0.13mm, which is less than (1 / w=1 / 2), the triangle area can be ignored, that is, it does not need to be filled with a compensating weft inserting process.

[0043] Set the center line in the length direction of the three-dimensional fabric as the starting position, such as figure 1 As shown, the part below the starting position is the B segment fabric (along the B direction), and the part above the starting positio...

Embodiment 2

[0074] Embodiment 2: Schematic diagram of H-shaped tubular fabric with flanging (similar symmetrical type)

[0075] combine figure 2 , image 3 with Figure 4 The instructions are as follows: set the thickness of the fabric to be 12mm, the number of warp layers to be 20, the density in the warp direction to be 9.5 threads / cm, the density in the weft direction to be 3.0 threads / cm, and the angle between the beveled flanging and the cylinder to be 88 degrees.

[0076] Calculated according to Formula 1 and Formula 2: the side length of the triangle c = 0.86mm, greater than (1 / w = 1 / 3), the triangle area needs to be filled with a compensating weft insertion process; calculated according to Formula 3 to Formula 6 : M=2.57 is rounded to 3, N 1 =6.7 rounded to 7, N 2 =13.3 is rounded to 13. Therefore, the number of weft insertion layers in the triangular low-density area is 13 layers, and the weft number is 2 latitudes. Since the included angle between the descending flanging ...

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