CN108004651B - Layer connection structure with designable oblique yarns in plane - Google Patents
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- CN108004651B CN108004651B CN201711497945.9A CN201711497945A CN108004651B CN 108004651 B CN108004651 B CN 108004651B CN 201711497945 A CN201711497945 A CN 201711497945A CN 108004651 B CN108004651 B CN 108004651B
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Abstract
The invention relates to a layer connection structure with designable oblique yarns in a plane, which comprises a plurality of layers, wherein each layer consists of warp yarns and oblique yarns, and the warp yarns are distributed in a sine wave shape along the length direction of a fabric; the oblique yarns and the warp yarns extend spirally in the positive direction or the reverse direction along the length direction at a certain included angle, and are interwoven with the warp yarns, and the included angle is an acute angle; the bias yarns are interwoven with the warp yarns of the layer and simultaneously are interwoven with the warp yarns of the adjacent layer. The invention can improve the performance of each direction in a plane, is convenient to realize mechanized preparation, can better meet the requirements of uniformity, integrity, high damage tolerance, impact resistance, delamination resistance, fatigue resistance and the like of fabrics, and has the advantages of good uniformity, excellent performance, simple and convenient operation, contribution to mechanized preparation, high efficiency, low cost and the like. The invention can be applied to the molding of plate type fabrics and can also be applied to the molding of rotary type fabrics of cylinder shape, cone shape, special shape and the like.
Description
Technical Field
The invention relates to a layer connection structure with designable oblique yarns in a plane, belonging to the field of manufacturing of three-dimensional fabrics.
Background
Fiber reinforced composites are an important direction of development for materials. The ply-bond structure is a preform structure, which is a fabric structure with bonds between layers, wherein a 2.5D structure is a common ply-bond structure. The reinforcement composite material prepared by the material has the comprehensive properties of high strength, high modulus, high damage tolerance, impact resistance, delamination resistance, fatigue resistance and the like, obviously improves the performance of weapons, receives the important attention of the composite material field, and becomes a research hotspot of the high-performance composite material technology. The 2.5D structure is formed by interweaving warp yarns and weft yarns, wherein the warp yarns are distributed in a periodic wave shape along the warp direction of the fabric, such as a sine wave shape; the weft yarns are perpendicular to the wave-shaped distribution plane of the warp yarns and are distributed in a linear or annular manner. However, the structure has only X, Y-direction fibers in the plane, and in-plane isotropy cannot be realized. In addition, the structure has slightly low volume content, high uniformity control difficulty, low efficiency and high labor cost.
With the development trend of three-dimensional fabrics, the requirements on high uniformity, rapidness and low cost of the fabrics are urgent, and the 2.5D structure can not meet the requirements in the field gradually. Therefore, a new structure and a forming method thereof, which have high uniformity, can realize in-plane isotropy, are easy to realize, are fast and low in cost, are needed to be invented to meet the market demand of three-dimensional fabrics.
Disclosure of Invention
The invention aims to provide a layer connection structure with designable oblique yarns in a plane, which can improve the performance of each direction in the plane, is convenient to realize mechanized preparation, can better meet the requirements of uniformity, integrity, high damage tolerance, impact resistance, delamination resistance, fatigue resistance and the like of fabrics, and has the advantages of good uniformity, excellent performance, simple and convenient operation, contribution to mechanized preparation, high efficiency, low cost and the like.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the layer connection structure capable of being designed by the oblique yarns in the plane has multiple layers, each layer consists of warp yarns and the oblique yarns, and the warp yarns are distributed in a sine wave shape along the length direction of the fabric; the oblique yarns and the warp yarns extend spirally in the length direction in the positive direction or the reverse direction at a certain included angle,and interweaving with warp yarns, the aforesaid included angle being acute。
The bias yarns are interwoven with the warp yarns of the layer and simultaneously are interwoven with the warp yarns of the adjacent layer.
The oblique yarns realize the change of the included angle theta between the oblique yarns and the warp yarns through the change of the translation step distance D;
the translation step distance D is the distance between two adjacent oblique yarn spindles, the oblique yarn translation step distance D is designed according to the oblique yarn inclination angle, namely the included angle theta between the oblique yarn and the warp yarn and the knuckle length L, the calculation method is shown in formula 1, and j is the warp yarn density;
defining the translation step distance for translating one spindle position to be 1, wherein the translation step distance of the oblique yarn is required to be more than or equal to 2;
the structure of the invention can also introduce weft yarns, and the weft yarns of each layer are simultaneously interwoven with the warp yarns and the oblique yarns of the same layer, thereby improving the mechanical property of weft direction or annular direction.
Compared with the prior art, the invention has the following advantages:
1. the structure related by the application has the characteristics of a common layer connection structure and has the advantages of the layer connection structure;
2. the oblique yarns are introduced into the structure plane, so that isotropy in the fabric plane can be realized;
3. the method is beneficial to mechanized preparation, and can realize high efficiency and low cost;
4. the method can be applied to the molding of plate type fabrics and can also be applied to the molding of cylindrical, conical, special-shaped and other rotary type fabrics;
5. the structure has good mechanical property; by introducing the weft yarns, the mechanical properties of the composite material prepared from the fabric formed by the structure can be further improved.
Tests show that 2.5D shallow cross-linking is compared with the tensile strength, the compressive strength and the interlaminar shear strength of the structure disclosed by the invention, and the specific data are shown in the following table.
Drawings
FIG. 1 is a schematic diagram of a conventional multilayer structure in the prior art;
wherein, FIG. 1(a) is a shallow cross-bending structure diagram, and FIG. 1(b) is a shallow cross-direct structure diagram;
FIG. 2 is a schematic plan view of a conventional multilayer structure in the prior art;
wherein FIG. 2(a) is a shallow cross-linking plan view, and FIG. 2(b) is a shallow cross-linking plan view
FIG. 3 is a diagram of spindle movement in a conventional shallow zigzag structure;
FIG. 4 is a diagram of the movement of a spindle in a conventional layer-connected shallow cross-direct connection structure;
FIG. 5(1) is a schematic diagram of a layer connection structure designed by oblique yarns in a plane, wherein the oblique yarns are warp yarns and oblique yarns;
FIG. 5(2) is a schematic diagram of a layer connection structure for the oblique yarns in the plane for introducing the weft yarns, and the weft yarns are shown;
FIG. 6 is a schematic view of the cloth yarn in the initial state of example 1;
FIG. 7 is a schematic view showing the movement of the spindle in the initial state in example 1;
fig. 8 is a schematic view showing the secondary movement of the spindles 1 and 2 in the initial state of example 1;
FIG. 9 is a schematic view of a second lower cloth yarn state in example 1;
FIG. 10 is a schematic view showing the movement of spindles in the second state of example 1;
fig. 11 is a schematic view showing the secondary movement of the spindles 1 and 2 in the second state of example 1;
FIG. 12 is a schematic view of an endless cloth yarn in example 2;
FIG. 13 is a schematic view showing the movement of the spindle in the initial state in example 2;
fig. 14 is a schematic view showing secondary movements of the spindles 1 to 6 in the initial state of example 2;
FIG. 15 is a schematic view of a second lower cloth yarn state in example 2;
FIG. 16 is a schematic view showing the movement of spindles in the second state of embodiment 2;
fig. 17 is a schematic view showing secondary movements of spindles 1 to 6 in state two of example 2;
FIG. 18 is a schematic view showing weft insertion in the initial state in example 3;
fig. 19 is a schematic diagram of weft insertion in the second state of embodiment 3.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications can be made by those skilled in the art after reading the contents set forth in the present invention, and equivalents can be used as they are within the scope defined by the claims set forth herein.
Example 1: the plate-shaped fabric is prepared by adopting the layer connection structure with the designable oblique yarns in the plane
The fabric dimensions were 20mm in length, 8mm in width and 2.5mm in thickness.
The fabric adopts in-plane oblique yarns to design a layer connection structure; the inclined angle of the oblique yarns is required to be 20-30 degrees (the included angle between the oblique yarns and the warp yarns); the fiber is 190Tex quartz fiber; designing 2 strands of warp yarns, 2 strands of oblique yarns, 5 layers of warp yarns and 6 layers of oblique yarns; the warp density was 8.0 threads/cm and the weft density was 2.0 threads/cm.
The specific process implementation steps are as follows:
1) initial yarn distribution: 5 layers of warp yarns and 6 layers of oblique yarns, wherein the arrangement mode is a square matrix type, the arrangement quantity is 6 rows of multiplied by 5 layers of warp yarns and 5 rows of multiplied by 6 layers of oblique yarns, and the displacement step distance of the oblique yarns is 2 spindle positions. The warp high and low rows are arranged at 1-1 interval, and the high row is 2 spindle positions higher than the low row, defining the device as an initial state at this time, as shown in fig. 6;
2) in the initial state of the device, the yarns on the yarn spindles No. 1 and No. 2 of the first layer of slant yarns are moved out of the yarn distribution matrix upwards, so that the yarn spindles No. 1 and No. 2 are left empty, as shown in (1) of FIG. 7;
3) after the step 2) is finished, the yarns on the No. 3 spindle of the first layer of oblique yarns are horizontally moved leftwards for 2 positions to the No. 1 spindle, and the No. 3 spindle is vacated, as shown in (2) of FIG. 7;
4) after the step 3) is finished, the yarns on the No. 4 spindle of the first layer of oblique yarns are horizontally moved to the left for 2 positions to the No. 2 spindle, and the No. 4 spindle is vacated, as shown in (3) of FIG. 7;
5) after the step 4) is finished, the yarns on the 5 # spindle of the first layer of oblique yarns are horizontally moved to the left for 2 positions to the 3 # spindle, and the 5 # spindle is vacated, as shown in (4) of fig. 7;
6) after step 5), the yarn on the second layer of spindle No. 6 is passed to the right around the warp yarn and moved to the first layer of spindle No. 4, as shown in FIG. 7 (5);
7) after step 6), the yarn on the spindle No. 7 of the second layer is wound to the right around the warp yarn and moved to the spindle No. 5 of the first layer, as shown in (6) of FIG. 7;
8) after step 7), shifting the yarn on the second layer of spindle 8 to the right by 2 positions to the second layer of spindle 6, as shown in fig. 7 (7);
9) after step 8), shifting the yarn on the second layer of spindle 9 to the right by 2 positions to the second layer of spindle 7, as shown in fig. 7 (8);
10) after step 9), shifting the yarn on the second layer of spindle 10 to the right by 2 positions to the second layer of spindle 8, as shown in fig. 7 (9);
11) after step 10), moving the first layer of original No. 1 yarn to the second layer of No. 2 yarn spindle, as shown in (1) of FIG. 8;
12) after step 11), moving the first layer of original No. 2 yarn to the second layer of No. 1 yarn spindle, as shown in (2) of FIG. 8;
13) referring to steps 2 to 12, the same operations are carried out on the 3 rd and 4 th layers of bias yarns and the 5 th and 6 th layers of bias yarns respectively;
14) after the step 13) is finished, carrying out column direction dislocation according to the motion rule of shallow zigzag connection, wherein after dislocation, the high column in the initial state is 2 spindle positions lower than the low column at the moment, and setting the state as a second state as shown in fig. 9;
15) in the second equipment state, the yarns on the yarn spindles No. 1 and No. 2 of the first layer of oblique yarns are moved out of the yarn distribution matrix upwards, so that the yarn spindles No. 1 and No. 2 are left out, as shown in (1) of FIG. 10;
16) after the step 15) is completed, the yarn on the first layer of slant yarn No. 3 spindle is translated leftwards for 2 positions to the No. 1 spindle, and the No. 3 spindle is vacated, as shown in (2) of FIG. 10;
17) after the step 16) is completed, the yarn on the yarn spindle No. 4 of the first layer of oblique yarns is horizontally moved to the left for 2 positions to the yarn spindle No. 2, and the yarn spindle No. 4 is vacated, as shown in a (3) of a graph in FIG. 10;
18) after the step 17) is completed, the yarn on the first layer of slant yarn No. 5 spindle is translated leftwards for 2 positions to No. 3 spindle, and the No. 5 spindle is vacated, as shown in (4) of FIG. 10;
19) after step 18) is completed, the yarn on the second layer of spindle 6 is passed to the right around the warp yarn and moved to the first layer of spindle 4, as shown in fig. 10 (5);
20) after step 19) is completed, the yarn on the second layer 7 spindle is passed to the right around the warp yarn and moved to the first layer 5 spindle as shown in fig. 10 (6);
21) after step 20), shifting the yarn on the second layer of spindle 8 to the right by 2 positions to the second layer of spindle 6, as shown in fig. 10 (7);
22) after step 21), shifting the yarn on the second layer of spindle 9 to the right by 2 positions to the second layer of spindle 7, as shown in fig. 10 (8);
23) after step 22) is completed, the yarn on the spindle of the second layer No. 10 is shifted to the right by 2 positions to the spindle of the second layer No. 8, as shown in fig. 10 (9);
24) after step 23), moving the first layer of original No. 1 yarn to the second layer of No. 2 yarn spindle, as shown in fig. 11 (1);
25) after step 24), moving the first layer of raw No. 2 yarn to the second layer of No. 1 yarn spindle, as shown in fig. 11 (2);
26) referring to steps 15 to 25, the same operations are performed for the 3 rd and 4 th layer bias yarns and the 5 th and 6 th layer bias yarns, respectively;
27) after the step 26) is finished, carrying out column-direction dislocation according to the motion rule of shallow cross-linking, wherein the equipment state after dislocation is the same as the initial state;
28) after the step 27) is completed, repeating the steps 2 to 16 under the initial state of the equipment, and respectively carrying out the same operations on the slant yarns of the 1 st and 2 nd layers, the 3 rd and 4 th layers and the 5 th and 6 th layers;
29) completing step 28), repeating steps 2 to 28 until the fabric length reaches 100 mm.
Example 2: the cylindrical fabric is prepared by adopting the layer connection structure with the designable oblique yarns in the plane
The fabric size was 12.7mm in diameter, 4mm in wall thickness and 200mm in height.
The fabric adopts in-plane oblique yarns to design a layer connection structure; the inclined angle of the oblique yarns is required to be 40-50 degrees (the included angle between the oblique yarns and the warp yarns); the fiber is 190Tex quartz fiber; designing 2 strands of warp yarns, 4 strands of oblique yarns, 5 layers of warp yarns and 6 layers of oblique yarns; the warp density was 8.0 threads/cm and the weft density was 1.5 threads/cm.
The specific process implementation steps are as follows:
1) initial yarn distribution: 5 layers of warp yarns and 6 layers of oblique yarns, wherein the arrangement mode is an annular matrix type, the arrangement number is 32 rows of multiplied by 5 layers of warp yarns and 32 rows of multiplied by 6 layers of oblique yarns, and the displacement step distance of the oblique yarns is 6 spindle positions. The warp high and low rows are arranged 1 by 1, and the high row is 2 spindle positions higher than the low row, defining the device as an initial state at this time, as shown in fig. 12;
2) in the initial state of the device, respectively translating the yarns on the spindles No. 1 to No. 6 of the first layer of slant yarns out of the annular matrix to empty the spindles No. 1 to No. 6, as shown in (1) of FIG. 13;
3) after the step 2) is finished, the yarn on the yarn spindle No. 7 of the first layer of oblique yarns is moved to the position of the yarn spindle No. 1 in the anticlockwise direction, as shown in a (2) of a figure 13;
4) after the step 3) is finished, the yarn on the first layer of oblique yarn No. 8 spindle is moved to the No. 2 spindle position in the anticlockwise direction, as shown in (3) of figure 13;
5) after the step 4) is finished, the yarn on the first layer of slant yarn 9 spindle is moved to the position of the spindle 3 in the anticlockwise direction, as shown in (4) of fig. 13;
6) after the step 5) is completed, the yarn on the n spindles is moved counterclockwise to the spindle position (n-6) in this way, as shown in fig. 13(4) to fig. 13 (26);
7) repeating step 6) until the yarn on the first layer of 32-gauge spindles moves counterclockwise to the position of 26-gauge spindles, as shown in fig. 13 (27);
8) after the step 7) is completed, respectively moving back the yarns No. 1 to No. 6 translated out of the annular matrix in the step 2), and moving the yarns No. 27 to No. 32 to spindles in the anticlockwise direction, as shown in fig. 14(1) to fig. 14 (6);
9) after the step 8) is finished, respectively carrying out the same operations on the 3 rd layer oblique yarns and the 5 th layer oblique yarns in the anticlockwise direction according to the steps 2) to 8); referring to the steps 2) to 8), performing similar operations on the 2 nd, 4 th and 6 th layers of bias yarns in a clockwise direction respectively;
10) after the step 9) is finished, carrying out column direction dislocation according to the motion rule of shallow zigzag connection, wherein after dislocation, namely the high column in the initial state is 2 spindle positions lower than the low column at the moment, and setting the state as a second state, as shown in fig. 15;
11) after the step 10) is completed, the same operations are performed according to the steps 2) to 10), as shown in fig. 16(1) to 16(27) and fig. 17(1) to 17 (6);
12) after the step 11) is finished, carrying out column-direction dislocation according to the motion rule of shallow cross-linking, wherein the equipment state after dislocation is the same as the initial state;
13) after the step 12) is finished, repeating the steps 3) to 12) in the initial state of the equipment, and carrying out the same operation;
14) after completion of step 13), steps 2) to 13) were repeated until the fabric length reached 200 mm.
15) The specific forming method of the conical rotary body fabric is similar to that of the cylindrical fabric, and the arrangement direction yarns are increased or decreased according to the process in the forming process, so that the specific embodiment is omitted.
Example 3: the plate-shaped fabric is prepared by adopting the layer connection structure with the designable oblique yarns in the plane
The fabric dimensions were 100mm in length, 8mm in width and 3mm in thickness.
The fabric adopts an in-plane oblique yarn which can be designed into a layer connection structure, and weft yarns are introduced; the inclined angle of the oblique yarns is required to be 15-20 degrees (the included angle between the oblique yarns and the warp yarns); the fiber is 190Tex quartz fiber; designing 2 strands of warp yarns, 2 strands of oblique yarns, 2 strands of weft yarns, 5 layers of warp yarns and 6 layers of oblique yarns; the warp density (weft or hoop) was 8.0 threads/cm and the parent density was 2.0 threads/cm.
The specific process implementation steps are as follows:
1) initial yarn distribution: 5 layers of warp yarns and 6 layers of oblique yarns, wherein the arrangement mode is a square matrix type, the arrangement quantity is 16 rows of multiplied by 5 layers of warp yarns and 15 rows of multiplied by 6 layers of oblique yarns, and the displacement step distance of the oblique yarns is 2 spindle positions. The warp high and low rows are arranged at 1-1 interval, and the high row is 2 spindle positions higher than the low row, defining the device as an initial state at this time, as shown in fig. 6;
2) after the step 1) is finished, opening the space between the 1 st layer warp yarn and the 1 st layer diagonal yarn and the 2 nd layer warp yarn and the 2 nd layer diagonal yarn on the upper surface, and introducing weft yarns, as shown in figure 18;
3) after the step 2) is completed, opening the space between the warp yarns and the bias yarns of the 2 nd layer and the 3 rd layer on the upper surface and introducing weft yarns, as shown in figure 18;
4) according to the method of step 2) and step 3), weft yarns are introduced layer by layer from top to bottom to the lower surface, as shown in fig. 18;
5) after the step 4) is finished, the yarns on the yarn spindles 1 and 2 of the first layer of slant yarns are moved out of the yarn distribution matrix upwards, and the yarn spindles 1 and 2 are left empty, as shown in (1) of fig. 7;
6) after the step 5) is finished, the yarns on the No. 3 spindle of the first layer of oblique yarns are horizontally moved leftwards for 2 positions to the No. 1 spindle, and the No. 3 spindle is vacated, as shown in (2) of FIG. 7;
7) after the step 6) is finished, the yarns on the No. 4 spindle of the first layer of oblique yarns are horizontally moved to the left for 2 positions to the No. 2 spindle, and the No. 4 spindle is vacated, as shown in (3) of FIG. 7;
8) after the step 7) is finished, the yarns on the 5 # spindle of the first layer of oblique yarns are horizontally moved to the left for 2 positions to the 3 # spindle, and the 5 # spindle is vacated, as shown in (4) of fig. 7;
9) after step 8), the yarn on the second layer of spindle 6 is passed to the right around the warp yarn and moved to the first layer of spindle 4, as shown in fig. 7 (5);
10) after step 9), the yarn on the spindle 7 of the second layer is passed to the right around the warp yarn and moved to the spindle 5 of the first layer, as shown in (6) of fig. 7;
11) after step 10), shifting the yarn on the second layer of spindle 8 to the right by 2 positions to the second layer of spindle 6, as shown in fig. 7 (7);
12) after step 11), shifting the yarn on the second layer of spindle 9 to the right by 2 positions to the second layer of spindle 7, as shown in fig. 7 (8);
13) after step 12), shifting the yarn on the second layer of spindle 10 to the right by 2 positions to the second layer of spindle 8, as shown in fig. 7 (9);
14) after step 13), moving the first layer of original No. 1 yarn to the second layer of No. 2 yarn spindle, as shown in (1) of FIG. 8;
15) after step 14), moving the first layer of raw No. 2 yarn to the second layer of No. 1 yarn spindle, as shown in fig. 8 (2);
16) referring to steps 5 to 15, the same operations are performed on the 3 rd and 4 th layer bias yarns and the 5 th and 6 th layer bias yarns respectively;
17) after the step 16) is finished, carrying out column-direction dislocation according to the motion rule of shallow zigzag connection, wherein after dislocation, the high column in the initial state is 2 spindle positions lower than the low column at the moment, and setting the state as a second state as shown in fig. 9;
18) after the step 17) is completed, opening the space between the 1 st layer warp yarn and the 1 st layer diagonal yarn and the 2 nd layer warp yarn and the 2 nd layer diagonal yarn on the lower surface, and introducing the weft yarn, as shown in figure 19;
19) after step 18) is completed, the weft yarns are introduced by opening the gaps between the bottom surface layer 2 warp yarns and layer 2 bias yarns and the bottom surface layer 3 warp yarns and layer 3 bias yarns, as shown in fig. 19;
20) according to the method of steps 18) and 19), weft yarns are introduced layer by layer from bottom to top up to the upper surface, as shown in fig. 19;
21) after the step 20) is completed, the yarns on the yarn spindles 1 and 2 of the first layer of slant yarns are moved out of the yarn distribution matrix upwards, and the yarn spindles 1 and 2 are left empty, as shown in fig. 10 (1);
22) after the step 21) is finished, the yarn on the yarn spindle No. 3 of the first layer of oblique yarn is horizontally moved to the left for 2 positions to the yarn spindle No. 1, and the yarn spindle No. 3 is vacated, as shown in (2) of FIG. 10;
23) after the step 22) is completed, the yarn on the yarn spindle No. 4 of the first layer of oblique yarns is horizontally moved to the left for 2 positions to the yarn spindle No. 2, and the yarn spindle No. 4 is vacated, as shown in fig. 10 (3);
24) after the step 23), the yarn on the first layer of slant yarn No. 5 spindle is translated leftwards for 2 positions to No. 3 spindle, and No. 5 spindle is vacated, as shown in fig. 10 (4);
25) after step 24), the yarn on the second layer of spindle 6 is passed to the right around the warp yarn and moved to the first layer of spindle 4, as shown in fig. 10 (5);
26) after step 25), the yarn on the second layer of spindle 7 is passed to the right around the warp yarn and moved to the first layer of spindle 5, as shown in fig. 10 (6);
27) after step 26) is completed, the yarn on the second layer of spindle 8 is translated to the right 2 positions onto the second layer of spindle 6, as shown in fig. 10 (7);
28) after step 27) is completed, the yarn on the second layer of spindle 9 is translated to the right 2 positions onto the second layer of spindle 7, as shown in fig. 10 (8);
29) after step 28) is completed, the yarn on the second layer of spindle 10 is translated to the right 2 positions onto the second layer of spindle 8, as shown in fig. 10 (9);
30) after step 29), moving the first layer of raw No. 1 yarn to the second layer of No. 2 yarn spindles, as shown in fig. 11 (1);
31) after step 30), moving the first layer of original No. 2 yarn to the second layer of No. 1 yarn spindle, as shown in fig. 11 (2);
32) referring to steps 21 to 31), the same operations are performed for the 3 rd and 4 th layer bias yarns and the 5 th and 6 th layer bias yarns, respectively;
33) after the step 32) is finished, carrying out column-direction dislocation according to the motion rule of shallow cross-linking, wherein the equipment state after dislocation is the same as the initial state;
34) after the step 33) is finished, repeating the steps 2) to 33) to carry out the same operation under the initial state of the equipment;
35) after completion of step 34), steps 2 to 34 are repeated until the fabric length reaches 100 mm.
Claims (2)
1. A layer connection structure fabric with planar oblique yarns capable of being designed comprises a plurality of layers and is characterized in that each layer consists of warp yarns and oblique yarns, wherein the warp yarns are distributed in a sine wave shape along the length direction of the fabric; the oblique yarns and the warp yarns extend spirally in the positive direction or the reverse direction along the length direction at a certain included angle, and are interwoven with the warp yarns, and the included angle is an acute angle;
the bias yarns are interwoven with the warp yarns of the layer and simultaneously are interwoven with the warp yarns of the adjacent layer;
the oblique yarns realize the change of the included angle theta between the oblique yarns and the warp yarns through the change of the translation step distance D;
the translation step distance D is the distance between two adjacent oblique yarn spindles, the oblique yarn translation step distance D is designed according to the oblique yarn inclination angle, namely the included angle theta between the oblique yarn and the warp yarn and the knuckle length L, the calculation method is shown in formula 1, and j is the warp yarn density;
the translation step distance for translating one spindle position is defined as 1, and the translation step distance of the oblique yarn is greater than or equal to 2.
2. The in-plane bias yarn programmable layer link fabric of claim 1 further comprising weft yarns, wherein the weft yarns of each layer are simultaneously interwoven with the warp yarns and bias yarns of the same layer.
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