CN106609417A - Three-dimensional knitting technology, and three-dimensional fabric - Google Patents

Abstract

The invention belongs to the field of weaving technology, and in particular relates to a three-dimensional weaving technology and a three-dimensional fabric. The three-dimensional weaving technology is completed on a three-dimensional weaving machine. The three-dimensional weaving machine includes knitting machines and knitting stations. 1) a column of weaving matrix A, the weaving station is arranged between any two adjacent knitting machines in the same row, so that the weaving stations are arranged into an n-order square matrix M, and the weaving station rotates around its axis to drive the knitting machine to rotate around the weaving station, Control the regular movement of the knitter to complete the weaving. The beneficial effect of this weaving process is that the three-dimensional fabric woven by this weaving process is a multi-layer fabric alternately horizontal and vertical. Therefore, one layer of the fabric falls off, and the remaining layers still have complete integrity. The structure does not affect the overall performance of the fabric, and the process is easy to achieve continuous production, which can be applied to the preparation of ablative composite materials for re-entry spacecraft, long-range missiles, etc.

Description

A three-dimensional weaving process and three-dimensional fabric

technical field

The invention belongs to the field of weaving technology, and in particular relates to a three-dimensional weaving technology and a three-dimensional fabric.

Background technique

Solving the heat protection problem of the reentry type is an extremely important technology for the development of medium and long-range missiles. Due to the development and application of ablative materials, it is possible for the warhead of an intercontinental missile to re-enter the atmosphere and hit the target, and it is possible for the manned spacecraft and space shuttle to return to the ground according to the predetermined orbit.

As an ablation material, it is required to have a large heat of vaporization, a large heat capacity, good heat insulation, and a strong function of radiating heat to the outside. In recent years, many fibers with high strength and high elastic modulus have been successfully developed, such as carbon fiber, boron fiber, zirconium carbide fiber and alumina fiber. Does not break armor. Ablation materials can also be used to solve the heat protection problems of the bottom of the rocket engine, the interstage section of the box body, the nose cone of the space shuttle, and the leading edge of the wing.

At present, the reinforced fabrics used for ablation composite materials are mainly three-dimensional braided composite materials, which are an advanced composite material reinforced by three-dimensional braided prefabricated parts. It is an ideal low-cost high-temperature resistant material. Among them, after the surface of some aircraft is ablated and peeled off, the reinforcing fabric in the remaining composite material is required to have a complete fabric structure, which neither affects the appearance of the aircraft surface nor affects the structural performance of the aircraft itself. Therefore, it is very important to develop a new three-dimensional weaving process. necessary.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a three-dimensional weaving process and a three-dimensional fabric. When the fabric woven by this process is ablated, one layer of the fabric falls off, while the other layers can still have a complete The organization still maintains a complete interweaving state, which will not affect the overall performance of the fabric.

In order to solve the problems of the technologies described above, the present invention adopts the basic idea of technical solution to be:

A three-dimensional weaving process, the three-dimensional weaving process is completed on a three-dimensional weaving machine, the three-dimensional weaving machine includes a braider and a weaving station, the braider is arranged into a weaving matrix A of n rows (n+1) columns, and the weaving station Set between any two adjacent knitting machines in the same row, so that the knitting stations are arranged in an n-order square matrix M, and the knitting stations rotate around their axes while driving the knitting machines to rotate around the knitting stations, controlling the regular movement of the knitting machines to complete weaving. Include the following steps:

Step 1): the knitting station located in the first column of the square matrix M rotates, and after driving the knitters on both sides of the knitting station to rotate forward 180° around the knitting station, the knitting station located in the second column of the square matrix M rotates, Drive the knitters on both sides of the knitting station to reverse 180° around the knitting station. After repeating this cycle twice, each knitter returns to the initial position of this step to complete a small cycle; then, the second and third columns The knitting station repeats the above-mentioned small cycle... until the (n-1)th column and the n-th column knitting station repeat the above-mentioned small cycle, each knitter returns to the initial position of this step, and re-forms the n-row (n+1) column weave matrix A;

Step 2): Each knitter in the knitting matrix A located in n rows (n+1) columns rotates 90° or 270° around any adjacent knitting station, so that the knitters are arranged in (n+1) rows A weaving matrix B with n columns;

Step 3): The knitting station located in the first row of the square matrix M rotates, and after driving the knitters on both sides of the knitting station to rotate forward or reverse 180° around the knitting station, the rotation direction of the knitting station in the second row is the same as that of the first row The direction of rotation of the knitting station in the row is opposite, and the knitters on both sides of the knitting station are driven to rotate 180° in the same direction around the knitting station. After repeating this for 2 times, each knitting device returns to the initial position of this step to complete a small cycle; then , the knitting stations of the 2nd row and the 3rd row repeat the above small cycle... until the (n-1)th row and the nth row knitting station repeat the above small cycle, each knitter returns to the initial position of this step, and re-forms The weaving matrix B of (n+1) rows and n columns;

Step 4): Each knitter in the (n+1) row n column knitting matrix B obtained in step 3) follows the same path as in step 2), with the opposite direction of rotation and the same rotation angle, and the initial position of step 1) is obtained again The weaving matrix A of the n rows (n+1) columns of the knitting matrix A completes a cycle;

Step 5): Repeat step 1)-step 4) many times to complete the weaving.

In the step 2), each braider rotates around any one of its adjacent braiding stations, and the direction of rotation is forward rotation or reverse rotation.

In the step 2), each weaving station element in the square matrix M is numbered as _{mi, j} , and each knitting element element of the weaving matrix A is numbered as a, where i, j are positive integers, and in the square matrix In M, when i=j, m _{i, j} drives a _{i, j} and a _{i, j+1} to rotate around m _{i, j} ; when i>j, m _{i, j} only drives a _{i, j} around m _{i, j} rotate; when i<j, m _{i, j} only drives a _{i, j+1} to rotate around m _{i, j} .

In the step 1), the forward rotation direction is clockwise or counterclockwise.

A three-dimensional fabric prepared by any one of the above three-dimensional weaving techniques.

After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: due to the adoption of the above-mentioned weaving process, the knitters are arranged in n rows (n+1) to weave the matrix A, and the knitters are driven by the rotation of the knitting station Regular movement, specifically, the yarn is carried on the knitter, and the movement of the knitter drives the yarn to complete the weaving. The yarn in each row is a group, and the yarn in each group is woven according to step 1). After this step is completed, it forms n layers of fabrics, the knots of the fabric are similar to braids, and then according to step 2) change the yarn position to form (n+1) row n column knitting matrix B, the process yarns are interlaced, and then the yarns of each column are used as a group, The yarns in each group are woven according to step 3), this process makes the fabric extend out n layers in the direction perpendicular to the yarn layers formed in step 1), and then the yarns are returned to their positions according to step 4), and so on, The formed fabric is a multi-layered fabric alternating horizontally and vertically. Therefore, one layer of the fabric falls off, and the remaining layers still have a complete structure, which does not affect the overall performance of the fabric. Moreover, this process is easy to achieve continuous production and is applied to re-entry Preparation of ablative composite materials for large-scale aerospace vehicles, long-range missiles, etc.

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute improper limitations to the present invention. Apparently, the drawings in the following description are only some embodiments, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts. In the attached picture:

Fig. 1 is a schematic diagram of the weaving process flow of Embodiment 2 of the present invention;

Fig. 2 is a schematic diagram of a weaving process flow in Embodiment 4 of the present invention;

Fig. 3 is a schematic diagram of the weaving process flow for changing the weaving matrix A with 3 rows and 4 columns into a weaving matrix B with 4 rows and 3 columns in Embodiment 5 of the present invention;

Fig. 4 is a schematic diagram of the weaving process flow for changing the weaving matrix B with 4 rows and 3 columns into the weaving matrix A with 3 rows and 4 columns in Embodiment 5 of the present invention;

Fig. 5 is a schematic diagram of the fabric prepared by the weaving process of Example 1 of the present invention.

In the figure: 1, knitting station; 2, knitting machine.

It should be noted that these drawings and text descriptions are not intended to limit the concept scope of the present invention in any way, but illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.

Embodiment one:

A three-dimensional weaving process, the three-dimensional weaving process is completed on a three-dimensional weaving machine, the three-dimensional weaving machine includes a braider and a weaving station, the braider is arranged into a weaving matrix A of n rows (n+1) columns, and the weaving station Set between any two adjacent knitting machines in the same row, so that the knitting stations are arranged in an n-order square matrix M, and the knitting stations rotate around their axes while driving the knitting machines to rotate around the knitting stations, controlling the regular movement of the knitting machines to complete weaving. It is characterized in that it comprises the following steps:

Step 1): the knitting station located in the first column of the square matrix M rotates, and after driving the knitters on both sides of the knitting station to rotate forward 180° around the knitting station, the knitting station located in the second column of the square matrix M rotates, Drive the knitters on both sides of the knitting station to reverse 180° around the knitting station. After repeating this cycle twice, each knitter returns to the initial position of this step to complete a small cycle; then, the second and third columns The knitting station repeats the above-mentioned small cycle... until the (n-1)th column and the n-th column knitting station repeat the above-mentioned small cycle, each knitter returns to the initial position of this step, and re-forms the n-row (n+1) column weave matrix A;

Step 2): Each knitter in the knitting matrix A of n rows (n+1) columns rotates forward or reverses 90° around any adjacent knitting station, so that the knitters are arranged as (n+1) A weaving matrix B with rows and n columns;

Step 3): The knitting station located in the first row of the square matrix M rotates, and after driving the knitters on both sides of the knitting station to rotate forward or reverse 180° around the knitting station, the rotation direction of the knitting station in the second row is the same as that of the first row The direction of rotation of the knitting station in the row is opposite, and the knitters on both sides of the knitting station are driven to rotate 180° in the same direction around the knitting station. After repeating this for 2 times, each knitting device returns to the initial position of this step to complete a small cycle; then , the knitting stations of the 2nd row and the 3rd row repeat the above small cycle... until the (n-1)th row and the nth row knitting station repeat the above small cycle, each knitter returns to the initial position of this step, and re-forms The weaving matrix B of (n+1) rows and n columns;

Step 4): The weaving matrix B obtained in step 3) is the same as the path in step 2), and the direction is reversed by 90°, and the weaving matrix A of n rows (n+1) columns in the initial position of step 1) is obtained again, and a cycle;

Step 5): Repeat step 1)-step 4) many times to complete the weaving.

Wherein, in the step 2), the rotation direction and rotation angle of each knitter follow the principle of occupancy and avoidance: any knitting station has four vacancies in the upper, lower, left and right positions, and each vacancy only allows A braider occupies a place, and when the position is occupied by a braider, other braiders avoid this position, and each braider rotates around its adjacent weaving station to occupy a place.

Further, each weaver rotates 90° or 270° around its adjacent weaving station to take up a place.

Furthermore, it is optimal for each braider to rotate 90° around its adjacent braiding station, because the route the braider travels is the shortest during the change process, which saves more weaving time.

Further, in the step 2), each knitting station element in the square matrix M is numbered as _{mi, j} , and each knitting machine element of the weaving matrix A is numbered as a, wherein i, j are positive integers, The rotation of the knitting station m _1,1 in the square matrix M drives the knitting machines a _1,1 and a _1,2 on both sides to rotate simultaneously.

Further, in the step 2), in the square matrix M, when i=j, _mi,j drives a _i,j and a _i,j+1 to rotate around _mi,j .

Furthermore, when i=j, _{mi and j} rotate in the same direction.

Furthermore, when i>j, _mi,j only drives a _{i ,j} to rotate around mi,j.

Furthermore, when i<j, _mi,j only drives a _i,j+1 to rotate around _mi,j .

Furthermore, when i>j and when i<j, the rotation direction of m _{i, j} is opposite to the rotation direction when i=j.

Wherein, in the step 1), the forward rotation direction is clockwise or counterclockwise.

The three-dimensional fabric prepared according to the above-mentioned method has good resistance to ablation.

The rotation of the knitting station drives the knitting machine to move regularly, and the yarn carried on the knitting machine is driven to move regularly, and the movement of the knitting machine drives the yarn to move to complete weaving. Arrange the knitters into a knitting matrix A with n rows (n+1) columns, the yarns in each row are a group, and the yarns in each group are woven according to step 1), and n layers of fabric are formed after this step is completed , the bow of the fabric is similar to braids, and then according to step 2) change the yarn position to form (n+1) row n column matrix B, the process yarns are interlaced, and in step 3) the yarns in each column are used as a group, The yarns in each group are woven according to step 3), this process makes the fabric extend out n layers in the direction perpendicular to the yarn layers formed in step 1), and then the yarns are returned to their positions according to step 4), and so on, The formed fabric is a multi-layered fabric alternating horizontally and vertically. Therefore, one layer of the fabric falls off, and the remaining layers still have a complete structure, which does not affect the overall performance of the fabric. Moreover, this process is easy to achieve continuous production and is applied to re-entry Preparation of ablative composite materials for large-scale aerospace vehicles, long-range missiles, etc.

Embodiment two:

A three-dimensional weaving process, the three-dimensional weaving process is completed on a three-dimensional weaving machine, the three-dimensional weaving machine includes a braider and a weaving station, the braider is arranged into a weaving matrix A of n rows (n+1) columns, and the weaving station It is arranged between any two adjacent knitting machines in the same row, so that the knitting stations are arranged in an n-order square matrix M, and the knitting stations rotate around their axes to drive the knitting machines to rotate around the knitting stations in the same direction, and control the regular movement of the knitting machines to complete weaving.

The following is an explanation with the second-order square matrix M arranged by weaving stations:

As shown in Figure 1, there are six knitters. One end of the yarn is fixed to the three-dimensional knitting machine, and the other end is set on the knitter. The rotation of the knitting station drives the movement of the knitter, which in turn drives the movement of the yarn to realize weaving. The knitters are arranged in 2 A knitting matrix A with three rows and three columns, each knitter is numbered as a _{i, j} (represented as the knitter in row i and column j), and the knitting station is set between any adjacent two knitting machines in the same row, and the knitting station The 2nd-order square matrix M arranged into, each weaving station element number in the square matrix M is m _{i, j} (representing the weaving station of the i-th row and the jth column), i, j are all positive integers, form as shown in Figure 1 The arrangement shown in (1).

The weaving steps of a kind of three-dimensional weaving process are as follows:

step 1):

(1) As shown in Figure 1(1), the knitting station m _1,1 and the knitting station m _2,1 located in the first column of the square matrix M rotate counterclockwise at the same time, and the knitting station m _1,1 rotates around the axis to drive Knitters a 1, ₁ and knitters a _{1, 2} on both sides rotate counterclockwise 180°, so that knitters a _{1, 1} and knitters a _{1, 2} exchange positions, and knitting station m ₂ , 1 rotates around the axis to drive The knitter a _2,1 and the knitter a _2,2 on both sides rotate 180° counterclockwise, so that the knitter a _2,1 and the knitter a _2,2 exchange positions, forming the knitting machine as shown in Figure 1(2). Arrangement;

(2) As shown in Figure 1(2), knitting station m _{1, 2} and knitting station m ₂ , 2 located in the second column of the square matrix M rotate clockwise at the same time, and knitting station m _{1, 2} rotates around the axis to drive The knitter a 1, ₁ and the knitter a 1, ₃ on both sides of the knitting machine rotate 180° clockwise, so that the knitting machine a ₁ , 1 and the knitting machine a 1, ₃ exchange positions, and the knitting station m 2, ₂ rotates to drive the two Side knitter a _2,1 and knitter a _2,3 rotate 180° clockwise, so that knitter a _2,1 and knitter a _2,3 exchange positions, forming an arrangement as shown in Figure 1(3) ;

(3) As shown in Figure 1(3), knitting station m _1,1 and knitting station m _2,1 , which are located in the first row of the square matrix M, repeat the rotation of (1), that is, rotate counterclockwise at the same time, and the knitting station m ₁ , 1 rotates around the axis, driving the knitters a _{1, 2} and knitting machines a ₁ , 3 to rotate 180° counterclockwise, so that the knitting machines a _{1, 2} and the knitting machines a 1, ₃ exchange positions, and at the same time knitting station m _{2 , 1} rotates counterclockwise around the axis, and drives knitter a ₂ , 2 and knitter a ₂ , 3 to rotate 180° counterclockwise, so that knitter a 2, ₂ and knitter a ₂ , 3 exchange positions, forming as shown in (4 ) in the arrangement shown;

(4) As shown in Figure 1 (4), the knitting station m _{1, 2} and the knitting station m ₂ , 2 located in the second column of the square matrix M repeat the rotation of (2), that is, rotate clockwise at the same time, and the knitting station m _{1, 2} rotates 180° clockwise, drives knitter a _{1, 2} and knitter a ₁ , 1 on both sides to rotate 180° clockwise, and makes knitter a _{1, 2} exchange with knitter a ₁ , 1 position, knitting station m _2,2 rotates 180° clockwise to drive knitter a _2,2 and knitter a _2,1 on both sides to rotate 180° clockwise, so that knitter a _2,2 and knitter a _{2, 1} exchange position, form the arrangement mode as shown in Figure 1 (5);

(5) As shown in Figure 1(5), knitting station m 1, ₁ and knitting station m ₂ , 1, which are located in the first column of the square matrix M, repeat the rotation of (1), that is, rotate counterclockwise at the same time, and the knitting station m ₁ , 1 rotates 180° counterclockwise, drives knitters a 1, ₃ and knitters a ₁ , 1 to rotate 180° counterclockwise, makes knitters a 1, ₃ and knitters a 1, ₁ exchange positions, and knitting station m ₂ , 1 rotates 180° counterclockwise, drives knitter a ₂ , 3 and knitter a ₂ , 1 to rotate 180° counterclockwise, and makes knitter a ₂ , 3 and knitter a ₂ , 1 exchange positions, as shown in the figure (6) Arrangement as shown;

(6) As shown in Figure 1(6), knitting stations m _{1, 2} and knitting stations m ₂ , 2, which are located in the second column of the square matrix M, repeat the rotation of (2), that is, they rotate clockwise at the same time, and the knitting stations m _{1, 2} rotates 180° clockwise, drives the knitters a _{1, 2} and a 1, ₃ on both sides to rotate 180° clockwise, and makes the knitters a _{1, 2} and a 1, ₃ exchange positions , knitting station m ₂ , 2 rotates 180° clockwise to drive knitter a 2, ₂ and knitter a ₂ , 3 on both sides to rotate 180° clockwise, so that knitter a 2, ₂ and knitter a _{2, 3} Exchanging positions to form the arrangement shown in Figure 1 (7), Figure 1 (7) and Figure 1 (1) represent the same weaving matrix A, that is, through the above-mentioned repeated cycle operation, each knitting machine returns to step 1) initial position;

Step 2): As shown in Figure 1 (7), knitting station m 1, ₁ and knitting station m ₂ , 2 located on the main diagonal of the square matrix M rotate 90° clockwise around the axis, and knitting station m 1, ₁ Rotate 90° clockwise to drive the knitters a ₁ , 1 and a _{1, 2} on both sides to rotate 90° clockwise around the knitting station m ₁ , 1, so that the knitters a ₁ , 1 and a _{1, 2} The upper and lower sides of m ₁ , 1 are separated, and the knitting station m ₂ , 2 rotates 90° clockwise to drive the knitters a ₂ , 2 and a 2, ₃ on both sides of the knitting station m ₂ , 2 to rotate 90° clockwise °, so that knitters a 2, ₂ and knitters a ₂ , 3 are placed on the upper and lower sides of knitting stations m ₂ , 2; knitting stations m ₂ , 1 and knitting stations m ₁ located on both sides of the main diagonal of the square matrix M _{, 2} rotates 90° counterclockwise around the axis, knitting station m _2,1 rotates counterclockwise to drive the knitter a _2,1 on its left side counterclockwise 90°, knitting station m _1,2 counterclockwise drives knitter a 2,1 on its right The knitters a ₁ and 3 are turned 90° counterclockwise, so that the knitters are arranged into a knitting matrix B with 3 rows and 2 columns, as shown in Figure 1 (8);

Step 3):

(1) as shown in Figure 1 (8), the weaving station m _1,1 and the weaving station m _1,2 that are positioned at the first row of the square matrix M rotate 180° clockwise around the axis at the same time, and the weaving station m _1, The rotation of ₁ drives the knitters a ₁ , 1 and a _{1, 2} on both sides to rotate clockwise 180°, so that a 1, ₁ and a _{1, 2} exchange positions; the knitting station m _{1, 2} rotates 180° clockwise Drive the braiders a 2, ₂ and braiders a ₁ , 3 on both sides to rotate clockwise 180°, so that the braiders a 2, ₂ and the braiders a 1, ₃ exchange positions, forming as shown in Figure 1 (9) arrangement of

(2) As shown in Fig. 1 (9), the weaving station m _2,1 and the weaving station m _2,2 which are located in the second row of the square matrix M rotate 180° counterclockwise at the same time, and the weaving station m _2,1 Rotate 180° counterclockwise to drive knitter a 1, ₁ and knitter a ₂ , 1 on both sides to rotate 180° counterclockwise, so that knitter a 1, ₁ and knitter a ₂ , 1 exchange positions; knitting station m _{2 , 2} rotates counterclockwise to drive the knitters a ₂ , 3 and knitters a ₁ , 3 on both sides to rotate 180° counterclockwise, so that the knits a ₂ , 3 and the knits a 1, ₃ exchange positions, forming as shown in Figure 1 The arrangement shown in (10);

(3) As shown in Figure 1(10), the weaving station m _1,1 and the weaving station m _1,2 located in the first row of the square matrix M repeat the rotation in the direction of (1) in this step, that is, at the same time according to Rotating clockwise, knitting station m ₁ , 1 rotates 180° clockwise to drive knitter a _{1, 2} and knitter a ₂ , 1 on both sides of it to rotate 180° clockwise, so that knitter a _{1, 2} and knitter a ₂ , 1 exchange positions; knitting station m _{1, 2} rotates clockwise to drive knitter a 2, ₂ and knitter a ₂ , 3 on both sides to rotate 180° clockwise, so that knitter a 2, ₂ and knitter a ₂ and 3 exchange positions to form an arrangement as shown in Figure 1 (11);

(4) As shown in Figure 1 (11), the weaving station m _2,1 and the weaving station m _2,2 , which are located in the second row of the square matrix M, repeat the rotation in the direction of (2) in this step, that is, at the same time according to Counterclockwise rotation, knitting station m ₂ , 1 rotates 180° counterclockwise to drive knitter a 1, ₁ and knitter a _{1, 2} on both sides to rotate 180° counterclockwise, so that knitter a 1, ₁ and knitter a _{1, 2} exchange positions; the knitting station m ₂ , 2 rotates 180° counterclockwise to drive the knitters a 1, ₃ and a ₂ , 2 on both sides of the knitting station to rotate 180° counterclockwise, so that the knitters a 1, ₃ and Braider a ₂ , 2 exchange positions, form the arrangement as shown in Figure 1 (12);

(5) As shown in Figure 1(12), the weaving station m _1,1 and the weaving station m _1,2 located in the first row of the square matrix M repeat the rotation in the direction of (1) in this step, that is, at the same time according to Rotating clockwise, knitting station m ₁ , 1 rotates 180° clockwise to drive knitter a ₂ , 1 and knitter a ₁ , 1 on both sides to rotate 180° clockwise, so that knitter a ₂ , 1 and knitter a ₁ , 1 exchange positions; knitting station m _{1, 2} drives 180° clockwise to make knitters a 1, ₃ and a ₂ , 3 on both sides rotate 180° clockwise, so that knitters a 1, ₃ and knitting Device a _2,3 exchanges position, forms the arrangement mode as shown in Figure 1 (13);

(6) As shown in Figure 1 (13), the weaving station m _2,1 and the weaving station m _2,2 , which are located in the second row of the square matrix M, repeat the rotation in the direction of (2) in this step, that is, at the same time according to Rotate counterclockwise, knitting station m ₂ , 1 rotates to drive knitter a _{1, 2} and knitter a ₂ , 1 on both sides to rotate 180° counterclockwise, so that knitter a _{1, 2} and knitter a ₂ , 1 are exchanged position; at the same time, knitting station m ₂ , 2 rotates 180° counterclockwise to drive knitter a _{2, 3} and knitter a ₂ , 2 on both sides of it to rotate 180° counterclockwise, so that knitter a ₂ , 3 and knitter a _{2 , 2} exchange positions, form the arrangement as shown in Figure 1 (14), now each braider all gets back to the initial position of this step;

Step 4): as shown in Figure 1 (14), the rotation direction of each weaving station forming the square matrix M in step 4) is opposite to that of the corresponding weaving station in step 2), and the rotation angle is the same; The weaving station m 1, ₁ and the weaving station m ₂ , 2, which are located on the main diagonal of the square matrix M, rotate 90° counterclockwise around the axis, and the weaving station m 1, ₁ drives the knitters a 1, ₁ and weaving machines on both sides of it. The knitting machine a _{1, 2} rotates counterclockwise 90° around the knitting station m ₁ , 1, so that the knitting machine a _{1, 1} and the knitting machine a _{1, 2} are placed on the left and right sides of m ₁ , 1, and the knitting station m 2, ₂ drives its Knitters a 2, ₂ and knitters a ₂ , 3 on both sides rotate counterclockwise 90° around knitting station m ₂ , 2, so that knitters a 2, ₂ and knitters a ₂ , 3 are separated around m ₂ , 2 Both sides; knitting station m ₂ , 1 and knitting station m _{1, 2} located on both sides of the main diagonal of the square matrix M rotate clockwise around the axis, and knitting station m ₂ , 1 rotates clockwise to drive the knitting machine a on the lower side ₂ , 1 turn 90° clockwise, so that knitter a ₂ , 1 is located on the left side of knitting station m ₂ , 1, and knitting station m _{1, 2} turns clockwise to drive knitter a ₁ , 3 on the upper side to turn clockwise 90 °, make braider a _1,3 be positioned at the right side of braiding station m _1,2 , form the arrangement mode as Fig. 1 (15), the arrangement mode of each braider of Fig. 1 (15) and Fig. 1 (1) is identical , each knitter returns to its initial position to complete a cycle;

Step 5): Step 1)-Step 4) is repeated to complete weaving to form a fabric.

There are 6 knitters, each carrying a spinning yarn, the six spinning yarns are arranged in 2 rows and 3 columns, each row is a group, through step 1), weaving forms two layers of fabric, and the knots in each layer of fabric are similar to braids , and then change the position of 6 spinning yarns according to step 2) to form a weaving matrix with 3 rows and 2 columns. This step makes the yarns in the two layers of fabrics separated from each other interweave, and then each column is used as a group, according to step 3) Carry out weaving, make each column form one deck fabric, form two layers altogether, step 1) and the fabric layer that step 3) forms are perpendicular, because step 2) makes step 1) interweave with the yarn in step 3), the formed The fabric layers are weaved together, and finally, through step 4) each spinning returns to its original position, and a cycle is completed, and the cycle continues, and the 6 yarns in the fabric of the weaving structure are in the state of regular interweaving, separation, and interweaving in the fabric. After one layer of fabric falls off, the other layer still has a complete structure, which does not affect the overall performance of the fabric, and the process is easy to achieve continuous production, and can be applied to ablation composite materials for re-entry spacecraft, long-range missiles, etc. preparation.

As shown in Figure 5, the structure of the fabric prepared by the weaving process in this embodiment.

In industrial production, it can be expanded according to needs, and the expansion method is to expand outward in the form of an n-order square matrix of knitting stations.

Embodiment three:

The difference between the present embodiment and the second embodiment is that the knitting station m 1, ₁ and the knitting station m ₂ , 1 located in the first column of the square matrix M in step 1) in the present embodiment rotate clockwise at the same time, and then each step The rotation direction of the knitting station in the above is opposite to that of the knitting station at the corresponding position in the corresponding step of the second embodiment, and the rotation angle is the same, and the weaving is completed to form a three-dimensional fabric with the same structure as that of the second embodiment.

Embodiment four:

A three-dimensional weaving process, the three-dimensional weaving process is completed on a three-dimensional weaving machine, the three-dimensional weaving machine includes a weaving device and a weaving station, the weaving device is arranged into a weaving matrix A of n rows (n+1) columns, and the weaving station is arranged on the same Between any two adjacent knitting machines, the knitting stations are arranged into an n-order square matrix M, and the knitting stations rotate around their axes to drive the knitting machines to rotate around the knitting stations in the same direction, and control the regular movement of the knitting machines to complete weaving.

As shown in Figure 2, there are 12 knitters. One end of the yarn is fixed to the three-dimensional knitting machine, and the other end is set on the knitter. The rotation of the knitting station drives the movement of the knitter, which in turn drives the movement of the yarn to realize weaving. The knitters are arranged in 3 A knitting matrix A with 4 rows and 4 columns, each knitting machine is numbered as a _{i, j} (represented as the knitting machine in row i and column j), and the knitting station is set between any adjacent two knitting machines in the same row, and the knitting station Arranged into a 3rd-order square matrix M, each weaving station element number in the square matrix M is _{mi, j} (representing the weaving station in the i-th row and j-column), and i, j are all positive integers, forming as shown in Figure 2 The arrangement shown in (1).

The weaving steps of a kind of three-dimensional weaving process are as follows:

step 1):

The knitting station in the 1st column of the square matrix M and the knitting station in the 2nd column of the square matrix M carry out the following small cycle, and the steps are as follows:

A: The knitting station in the first column of the square matrix M and the knitting station in the second column of the square matrix M rotate in the following way, and the steps are as follows:

(1) As shown in Figure 2(1), knitting station m _1,1 , knitting station m _2,1 and knitting station m _3,1 located in the first column of the square matrix M rotate counterclockwise at the same time, knitting station m ₁ , 1 rotate around the axis to drive the knitters a 1, ₁ and knitters a _{1, 2} on both sides to rotate counterclockwise 180°, so that the knitters a 1, ₁ and the knitters a _{1, 2} exchange positions; knitting station m ₂ , 1 rotates around the axis to drive the knitter a ₂ , 1 and knitter a ₂ , 2 on both sides to rotate counterclockwise 180°, so that the knitter a ₂ , 1 and the knitter a 2, ₂ exchange positions; knitting station m ₃ , 1 rotates around the axis to drive the knitter a ₃ , 1 and knitter a ₃ , 2 on both sides to rotate counterclockwise 180°, so that the knitter a ₃ , 1 and the knitter a ₃ , 2 exchange positions, forming a the arrangement shown in 2(2);

(2) As shown in Figure 2(2), knitting station m _1,2 , knitting station m _2,2 and knitting station m _3,2 located in the second column of the square matrix M rotate clockwise at the same time, knitting station m _{1, 2} rotate around the axis to drive the knitter a 1, ₁ and knitter a _{1, 3} on both sides to rotate clockwise 180°, so that the knitter a 1, ₁ and the knitter a 1, ₃ exchange positions; knitting station m The rotation of ₂ , 2 drives the knitter a ₂ , 1 and the knitter a ₂ , 3 on both sides to rotate 180° clockwise, so that the knitter a ₂ , 1 and the knitter a ₂ , 3 exchange positions; the knitting station m _{3, 2} Rotation drives the knitter a _3,1 and the knitter a _3,3 on both sides to rotate 180° clockwise, so that the knitter a _3,1 and the knitter a _3,3 exchange positions, forming as shown in Figure 2 (3) the arrangement shown;

B: The knitting station in the first column of the square matrix M and the knitting station in the second column of the square matrix M repeat the above-mentioned rotation operation for the first time, and the steps are as follows:

(3) As shown in Figure 2(3), knitting station m _1,1 , knitting station m _2,1 and knitting station m _3,1 located in the first column of the square matrix M repeat the rotation of (1), that is, at the same time According to the counterclockwise rotation, the knitting station m ₁ , 1 rotates around the axis, driving the knitting machines a _{1, 2} and the knitting machines a ₁ , 3 to rotate 180° counterclockwise, so that the knitting machines a _{1, 2} and the knitting machines a 1, ₃ are exchanged position; at the same time, knitting station m ₂ , 1 rotates counterclockwise around the axis, driving knitter a 2, ₂ and knitting machine a ₂ , 3 to rotate counterclockwise 180°, so that knitting machine a 2, ₂ and knitting machine a ₂ , 3 are exchanged Position; knitting station m ₃ , 1 rotates counterclockwise around the axis, drives knitter a ₃ , 2 and knitter a ₃ , 3 to rotate counterclockwise 180°, and makes knitter a ₃ , 2 and knitter a 3, ₃ exchange positions , forming an arrangement as shown in Figure 2(4);

(4) As shown in Figure 2(4), the knitting station m _1,2 , knitting station m _2,2 and knitting station m _3,2 located in the second column of the square matrix M repeat the rotation of (2), that is, at the same time According to the clockwise rotation, the knitting station m _{1, 2} rotates 180° clockwise, and drives the knitter a _{1, 2} and the knitter a ₁ , 1 on both sides of the knitting station to rotate 180° clockwise, so that the knitter a _{1, 2} and Knitters a 1, ₁ exchange positions; knitting station m ₂ , 2 rotates 180° clockwise to drive knitters a 2, ₂ and knitters a ₂ , 1 on both sides to rotate 180° clockwise, so that knitters a _{2, 2} and knitter a ₂ , 1 exchange positions; knitting station m ₃ , 2 rotates 180° clockwise to drive knitter a ₃ , 2 and knitter a ₃ , 1 on both sides of the knitting station to rotate 180° clockwise, so that knitter a ₃ , 2 exchange positions with braider a ₃ , 1 to form an arrangement as shown in Figure 2 (5);

C: The knitting station in the first column of the square matrix M and the knitting station in the second column of the square matrix M repeat the above-mentioned rotation operation for the second time. The specific steps are as follows:

(5) As shown in Figure 2(5), knitting station m _1,1 , knitting station m _2,1 and knitting station m _3,1 located in the first column of the square matrix M repeat the rotation of (1), that is, at the same time According to the counterclockwise rotation, the knitting station m ₁ , 1 rotates 180° counterclockwise, drives the knitter a 1, ₃ and the knitter a ₁ , 1 to rotate 180° counterclockwise, and makes the knitter a 1, ₃ and the knitter a _{1, 1} exchange position; at the same time knitting station m ₂ , 1 rotates 180° counterclockwise, drives knitter a ₂ , 3 and knitter a ₂ , 1 rotates 180 ° counterclockwise, makes knitter a 2, ₃ and knitter a _{2, 1} exchange position; knitting station m ₃ , 1 turns counterclockwise 180°, drives knitter a 3, ₃ and knitter a ₃ , 1 counterclockwise 180°, makes knitter a 3, ₃ and knitter a ₃ , 1 Exchange positions to form an arrangement as shown in Figure (6);

(6) As shown in Figure 2(6), the knitting station m _1,2 , knitting station m _2,2 and knitting station m _3,2 located in the second row of the square matrix M repeat the rotation of (2), that is, at the same time According to the clockwise rotation, the knitting station m _{1, 2} rotates 180° clockwise, and drives the knitter a _{1, 2} and the knitter a _{1, 3} on both sides to rotate 180° clockwise, so that the knitter a _{1, 2} and the knitting The position of knitting machine a 1, ₃ is exchanged; knitting station m ₂ , 2 rotates 180° clockwise to drive knitting machine a 2, ₂ and knitting machine a ₂ , 3 on both sides to rotate 180 ° clockwise, so that knitting machine a 2, ₂ Exchange positions with knitters a ₂ , 3; knitting station m ₃ , 2 rotates 180° clockwise to drive knitters a 3, ₂ and knitters a ₃ , 3 on both sides to rotate 180° clockwise, making knitter a _{3 , 2} and braider a _3,3 exchange position, form the arrangement shown in Figure 2 (7), Fig. 2 (7) and Fig. 2 (1) represent same weaving matrix A, namely through above-mentioned repeating cycle operation, Each braider has got back to the initial position of step 1), and above-mentioned process is a small cycle;

The knitting station in the second column of the square matrix M and the knitting station in the third column of the square matrix M repeat the above-mentioned small cycle, and the steps are as follows:

A: The knitting station in the second column of the square matrix M and the knitting station in the third column of the square matrix M rotate in the following way, and the steps are as follows:

(1) As shown in Figure 2(7), knitting station m _{1, 2} , knitting station m 2, ₂ and knitting station m ₃ , 2 in the second column of the square matrix M rotate counterclockwise at the same time, knitting station m _{1, 2} rotate around the axis to drive the knitter a _{1, 2} and knitter a ₁ , 3 on both sides to rotate 180° counterclockwise, so that the knitter a _{1, 2} and the knitter a 1, ₃ exchange positions; knitting station m The rotation of 2 and ₂ around the shaft drives the knitter a 2, ₂ and the knitter a ₂ , 3 on both sides to rotate counterclockwise 180°, so that the knitter a 2, ₂ and the knitter a _{2, 3} exchange positions; the knitting station m The rotation of _3,2 around the axis drives the knitter a _3,2 and the knitter a _3,3 on both sides to rotate 180° counterclockwise, so that the knitter a _3,2 and the knitter a _3,3 exchange positions, forming a The arrangement shown in 2(8);

(2) As shown in Figure 2(8), knitting station m _1,3 , knitting station m _2,3 and knitting station m _3,3 located in the third column of the square matrix M rotate clockwise at the same time, knitting station m 1, ₃ rotate around the axis to drive the knitter a _{1, 2} and knitter a 1, ₄ on both sides to rotate clockwise 180°, so that the knitter a _{1, 2} and the knitter a 1, ₄ exchange positions; knitting station m The rotation of ₂ , 3 drives the knitters a ₂ , 2 and a 2, ₄ on both sides to rotate clockwise 180°, so that the knitters a 2, ₂ and the knitters a 2, ₄ exchange positions; the weaving station m _{3, 3} rotation drives the knitter a _3,2 and the knitter a _3,4 on both sides to rotate clockwise 180°, so that the knitter a _3,2 and the knitter a _3,4 exchange positions, forming as shown in Figure 2 (9) the arrangement shown;

B: The knitting station in the second column of the square matrix M and the knitting station in the third column of the square matrix M repeat the above-mentioned rotation operation for the first time, and the steps are as follows:

(3) As shown in Figure 2(9), knitting station m _1,2 , knitting station m _2,2 and knitting station m _3,2 located in the second column of the square matrix M repeat the rotation of (1), that is, at the same time According to the counterclockwise rotation, the knitting station m _{1, 2} rotates around the axis, driving the knitting machines a 1, ₃ and the knitting machines a 1, ₄ to rotate 180° counterclockwise, so that the knitting machines a 1, ₃ and the knitting machines a 1, ₄ are exchanged position; at the same time, the knitting station m ₂ , 2 rotates counterclockwise around the axis, driving the knitting machines a ₂ , 3 and the knitting machines a ₂ , 4 to rotate 180° counterclockwise, so that the knitting machines a ₂ , 3 and the knitting machines a ₂ , 4 are exchanged Position; knitting station m ₃ , 2 rotates counterclockwise around the axis, driving knitter a 3, ₃ and knitter a ₃ , 4 to rotate 180° counterclockwise, making knitter a 3, ₃ and knitter a ₃ , 4 exchange positions , forming an arrangement as shown in Figure (10);

(4) As shown in Fig. 2(10), the weaving station m _1,3 , the weaving station m _2,3 and the weaving station m _3,3 located in the third row of the square matrix M repeat the rotation of (2), that is, at the same time According to clockwise rotation, knitting station m ₁ , 3 rotates 180 ° clockwise, drives knitter a 1, ₃ and knitter a _{1, 2} on both sides of it to rotate clockwise 180 °, makes knitter a 1, ₃ and Knitters a _{1 and 2} exchange positions, and knitting station m ₂ and 3 rotate 180° clockwise to drive knitters a ₂ and 3 and knitters a ₂ and 2 on both sides to rotate 180° clockwise, so that knitters a _{2, 3} and knitter a ₂ , 2 exchange positions; knitting station m ₃ , 3 rotates 180 ° clockwise to drive the knitter a 3, ₃ and knitter a ₃ , 2 on both sides of the knitting station m to rotate 180 ° clockwise, so that knitter a ₃ , 3 and braider a ₃ , 2 exchange positions, form the arrangement as shown in Figure 2 (11);

C: The knitting station in the second column of the square matrix M and the knitting station in the third column of the square matrix M repeat the above-mentioned rotation operation for the second time, and the steps are as follows:

(5) As shown in Figure 2(11), knitting station m _1,2 , knitting station m _2,2 and knitting station m _3,2 located in the second column of the square matrix M repeat the rotation of (1), that is, at the same time According to the counterclockwise rotation, the knitting station m _{1, 2} rotates 180° counterclockwise, driving the knitter a 1, ₄ and the knitter a _{1, 2} to rotate 180° counterclockwise, so that the knitter a 1, ₄ and the knitter a _{1, 2} exchange positions; at the same time, knitting station m ₂ , 2 rotates 180° counterclockwise, driving knitters a 2, ₄ and knitting machines a ₂ , 2 rotate counterclockwise 180 °, making knitting machines a 2, ₄ and knitting machines a _{2, 2} exchange positions, knitting station m ₃ , 2 rotates 180° counterclockwise, drives knitter a ₃ , 4 and knitter a ₃ , 2 rotate counterclockwise 180 °, makes knitter a ₃ , 4 and knitter a ₃ , 2 Exchange position, form the arrangement as shown in Figure (12);

(6) As shown in Figure 2(12), the weaving station m _1,3 , weaving station m _2,3 and weaving station m _3,3 located in the third column of the square matrix M repeat the rotation of (2), that is, at the same time According to the clockwise rotation, the knitting station m ₁ , 3 rotates 180° clockwise, and drives the knitter a 1, ₄ and the knitter a ₁ , 3 on both sides to rotate 180° clockwise, so that the knitter a 1, ₄ and the knitting The position of knitting machine a 1, ₃ is exchanged; knitting station m ₂ , 3 rotates 180° clockwise to drive knitting machine a 2, ₃ and knitting machine a ₂ , 4 on both sides of it to rotate 180 ° clockwise, so that knitting machine a ₂ , 3 Exchange positions with knitters a ₂ and 4; knitting station m ₃ and 3 rotate clockwise 180° to drive knitters a ₃ and 3 and knitters a 3 and ₄ on both sides to rotate 180° clockwise to make knitter a _{3 , 3} and braider a ₃ , 4 exchange positions, form the arrangement as shown in Figure 2 (13), complete the above-mentioned small cycle; Figure 2 (13) obtained and Figure 2 (1) represent the same 3 rows and 4 columns The weaving matrix A, that is, through the above-mentioned repeated cycle operation, each braider is back to the initial position of step 1);

Step 2): The knitting matrix A with 3 rows and 4 columns arranged by the knitter is transformed into a knitting matrix B with 4 rows and 3 columns

As shown in Figure 2(13), the knitters are arranged as a knitting matrix A with 3 rows and 4 columns, and the knitting station m ₁ , 1 rotates 90° clockwise around the axis, driving the knitting machines a 1, ₁ and knitting machines on both sides a _{1, 2} rotate clockwise 90° around knitting station m ₁ , 1, so that knitting machine a 1, ₁ and knitting machine a _{1, 2} are respectively located on the upper and lower sides of knitting station m ₁ , 1, knitting station m ₂ , 1 and knitting station m ₃ , 1 respectively rotate 90° counterclockwise around the axis to drive knitter a ₂ , 1 to rotate counterclockwise 90° around knitting station m ₃ , 1, so that knitter a ₂ , 1 and knitter a ₃ , 1 They are respectively located under knitting stations m ₂ , 1 and knitting stations m ₃ , 1; knitting stations m _{1, 2} rotate 90° counterclockwise to drive knitters a ₁ , 3 to rotate 90° counterclockwise, so that knitters a 1, ₃ are located at Above knitting station m _{1, 2} , knitting station m ₂ , 2 rotates 90° clockwise, and drives knitting machine a ₂ , 2 to rotate clockwise 90°, so that knitting machine a ₂ , 2 is located above knitting station m ₂ , 2 ; The knitting station m ₃ , 2 rotates 90° clockwise, and drives the knitters a ₃ , 2 and a 3, ₃ on both sides of the knitting station to rotate 90° clockwise, so that the knitters a 3, ₂ and a _{3, 3} are respectively located on the upper and lower sides of knitting stations m ₃ and 2; knitting stations m ₁ and 3 are turned 90° counterclockwise, and knitters a 1 and ₄ are turned 90° counterclockwise, so that knitters a 1 and ₄ are located at knitting stations m _{1 , 3} above, knitting station m ₂ , 3 rotates 90° clockwise, drives knitter a ₂ , 3 and knitter a _{2, 4} to rotate 90° clockwise, making knitter a 2, ₃ and knitter a _{2, 4} are respectively located on the upper and lower sides of knitting stations m ₂ and 3; knitting stations m ₃ and 3 rotate clockwise by 90° to drive knitters a ₃ and 4 to rotate clockwise by 90° so that knitters a ₃ and 4 are located at knitting stations Below m _3,3 , form the arrangement as shown in Figure 2 (14), after above-mentioned transformation, the weaving matrix A of 3 rows and 4 columns is transformed into the weaving matrix B of 4 rows and 3 columns;

The transformation of this step must conform to the principle of occupancy and avoidance: any knitting station has four vacancies in the upper, lower, left and right positions around it, and each vacancy only allows one knitter to occupy the place. After the position is occupied by a braider, other braiders then avoid this position, and each braider rotates around its adjacent weaving station to occupy the place, and rotates with the scheme of the shortest running path in the transformation of this embodiment, that is, every A weaver only rotates 90° around its adjacent weaving station to occupy the place, explained as follows:

In this step, each knitter can only rotate 90° clockwise or counterclockwise to occupy the space. When the knitting station m ₁ , 1 rotates 90° clockwise around the axis, the knitter a 1, ₁ and knitter a on both sides are driven. _{1, 2} rotate clockwise 90° around knitting station m ₁ , 1 to occupy the upper and lower vacancies of knitting station m ₁ , 1, and then knitting machine a ₂ , 1 cannot rotate 90° clockwise due to the principle of occupancy and avoidance ° but can only rotate 90° counterclockwise around knitting station m ₂ , 1, and knitting machine a ₂ , 1 occupies the vacancy at the lower part of knitting station m ₂ , 1. Similarly, knitting machine a ₃ , 1 can only go around knitting station m _{3 , 1} rotates 90° counterclockwise, and knitter a ₃ , 1 occupies the vacancy below knitting station m ₃ , 1; the vacancy above knitting station m _{1, 2} can only be rotated 90° counterclockwise by knitter a ₁ , 3 or Knitter a _{1, 2} rotates 90° clockwise to occupy the seat, but knitter a _{1, 2} has already moved to the lower part of knitting station m ₁ , 1, so the vacancy above knitting station m _{1, 2} can only be occupied by knitter a 1, ₃ rotate 90° counterclockwise; the vacancy at the bottom of knitting station m _{1, 2} can be rotated 90° clockwise by knitter a ₂ , 2 or 90° counterclockwise by knitter a ₂ , 3, this embodiment Middle knitter a ₂ , 2 turns 90 ° clockwise and arrives at the top of knitting station m ₂ , 2, (the situation of turning 90 ° counterclockwise by knitter a ₂ , 3 is also possible, the principle is the same as another embodiment), this In the embodiment, the vacancy at the bottom of knitting station m ₂ , 2 can be turned 90° clockwise by knitter a ₂ , 3 or turned 90° clockwise by knitter a ₃ , 2 or counterclockwise by knitter a ₃ , 3 Rotate 90°, knitter a ₂ , ₃ turn 90° clockwise to be the fifth embodiment, the principle is the same, and will not be described in detail here _{. 2} and knitter a _3,3 take up space, so this position can be that knitter a _3,2 and knitter a _3,3 turn 90° clockwise or 90° anticlockwise at the same time; knitting station m _1, The vacancy at the upper part of ₃ can only be occupied by knitting machine a 1, ₄ turning 90° counterclockwise, knitting station m ₃ , the position at the lower part of 3 can only be occupied by knitting machine a ₃ , 4 turning 90° clockwise, knitting station m The _two vacancies at the top and bottom of 2 and 3 can only be occupied by the knitter a _2,3 and the knitter a _2,4 turning 90° clockwise or counterclockwise.

In the above conversion process, the knitter rotated 90° around the knitting station can also reach the target position by reversely rotating 270° to realize the change from knitting matrix A to knitting matrix B.

Step 3): The weaving matrix B obtained in step 2) is carried out as follows:

A: The knitting station in the first row of the square matrix M and the knitting station in the second row of the square matrix M rotate in the following way, and the steps are as follows:

(1) As shown in Figure 2(14), knitting station m _1,1 , knitting station m _1,2 and knitting station m _1,3 located in the first row of the square matrix M rotate 180 counterclockwise around the axis at the same time °, knitting station m ₁ , 1 rotates to drive knitter a 1, ₁ and knitter a _{1, 2} on both sides to rotate counterclockwise 180°, so that a 1, ₁ and a _{1, 2} exchange positions; knitting station m _{1 , 2} rotate counterclockwise 180° to drive knitter a 2, ₂ and knitter a ₁ , 3 on both sides to rotate 180° counterclockwise, so that knitter a 2, ₂ and knitter a 1, ₃ exchange positions; knitting station m ₁ , 3 turns 180° counterclockwise to drive knitters a 1, ₄ and knits a ₂ , 3 on both sides to rotate 180° counterclockwise, so that knits a 1, ₄ and knits a ₂ , 3 exchange positions, Form the arrangement shown in Figure 2 (15);

(2) As shown in Figure 2(15), knitting station m _2,1 , knitting station m _2,2 and knitting station m _2,3 located in the second row of the square matrix M rotate 180° clockwise at the same time , knitting station m _2,1 rotates 180° clockwise to drive knitter a _1,1 and knitter a _2,1 on both sides to rotate 180° clockwise, making knitter a _1,1 and knitter a _2,1 Exchanging positions; knitting station m ₂ , 2 rotates clockwise to drive knitter a 1, ₃ and knitter a ₃ , 2 on both sides to rotate 180° clockwise, so that knitter a 1, ₃ and knitter a ₃ , 2 Exchanging positions; knitting station m ₂ , 3 rotates clockwise to drive knitters a 1, ₄ and knitters a ₂ , 4 on both sides to rotate 180° clockwise, so that knitters a 1, ₄ and knitters a 2, ₄ Exchange position, form the arrangement as shown in Figure 2 (16);

B: The knitting station in the first row of the square matrix M and the knitting station in the second row of the square matrix M repeat the above-mentioned rotation operation for the first time, and the steps are as follows:

(3) As shown in Figure 2(16), the knitting station m _1,1 , knitting station m _1,2 and knitting station m _1,3 located in the first row of the square matrix M repeat this step (1) Rotate in the same direction, that is, rotate counterclockwise at the same time, the knitting station m ₁ , 1 rotates 180° counterclockwise to drive the knitters a _{1, 2} and a ₂ , 1 on both sides of the knitting station to rotate 180° counterclockwise, so that the knitter a _{1, 2} and knitter a ₂ , 1 exchange positions; knitting station m _{1, 2} rotates counterclockwise to drive knitter a 2, ₂ and knitter a ₃ , 2 on both sides of the knitting station to rotate 180° counterclockwise, so that knitter a ₂ , 2 and knitter a ₃ , 2 exchange positions, and knitting station m 1, ₃ rotates counterclockwise to drive knitter a _{2, 3} and knitter a ₂ , 4 on both sides of it to rotate 180° counterclockwise, so that knitter a _2,3 exchange position with braider a _2,4 , form the arrangement as shown in Figure 2 (17);

(4) As shown in Fig. 2 (17), the knitting station m _2,1 , knitting station m _2,2 and knitting station m _2,3 located in the second row of the square matrix M repeat this step (2) Rotate in the direction of , that is, rotate clockwise at the same time, the knitting station m ₂ , 1 rotates 180° clockwise to drive the knitter a 1, ₁ and knitter a _{1, 2} on both sides of it to rotate 180° clockwise, so that the knitter a ₁ , 1 and knitter a _{1, 2} exchange positions; knitting station m ₂ , 2 rotates 180° clockwise to drive knitter a 1, ₃ and knitter a ₂ , 2 on both sides to rotate 180° clockwise, so that Knitters a 1, ₃ and knitters a 2, ₂ exchange positions; knitting station m ₂ , 3 rotates 180° clockwise to drive knitters a ₂ , 3 and knitters a 1, ₄ on both sides to rotate 180° clockwise °, make braider a _2,3 and braider a _1,4 exchange positions, form the arrangement as shown in Figure 2 (18);

C: The knitting station in the first row of the square matrix M and the knitting station in the second row of the square matrix M repeat the above-mentioned rotation operation for the second time, and the steps are as follows:

(5) As shown in Figure 2(18), the knitting station m _1,1 , knitting station m _1,2 and knitting station m _1,3 located in the first row of the square matrix M repeat the step (1) Rotate in the direction of , that is, rotate counterclockwise at the same time, knitting station m ₁ , 1 rotates 180° clockwise to drive knitter a ₂ , 1 and knitter a ₁ , 1 on both sides of it to rotate 180° counterclockwise, so that knitter a _2, 1 and knitter a ₁ , 1 exchange positions; knitting station m _{1, 2} rotate counterclockwise to drive 180 ° to make knitter a 1, ₃ and knitter a ₃ , 2 on both sides rotate 180 ° counterclockwise, so that Knitters a 1, ₃ and knitters a ₃ , 2 exchange positions; knitting station m 1, ₃ rotates counterclockwise to drive 180° so that knitters a 2, ₄ and knitters a 1, ₄ on both sides rotate 180 degrees counterclockwise °, make braider a _2,4 and braider a _1,4 exchange position, form the arrangement as shown in Figure 2 (19);

(6) As shown in Fig. 2 (19), the knitting station m _2,1 , knitting station m _2,2 and knitting station m _2,3 located in the second row of the square matrix M repeat the step (2) Rotate in the direction of , that is, rotate clockwise at the same time, the knitting station m ₂ , 1 rotates to drive the knitters a ₂ , 1 and knitters a _{1, 2} on both sides to rotate 180° clockwise, so that the knitters a _{1, 2} and Knitters a ₂ , 1 exchange positions; at the same time, knitting station m ₂ , 2 rotates 180° clockwise to drive knitters a ₃ , 2 and knitters a ₂ , 2 on both sides to rotate 180° clockwise, so that knitter a _{3 , 2} and knitter a ₂ , 2 exchange positions; at the same time, knitting station m ₂ , 3 rotates 180° clockwise to drive knitter a _{2, 3} and knitter a ₂ , 4 on both sides of it to rotate 180° clockwise, so that knitting Device a _2,3 and braider a _2,4 exchange position, form the arrangement as shown in Figure 2 (20);

The above steps are a small cycle, at this time each knitter returns to the initial position of this step;

The knitting station in the second row of the square matrix M and the knitting station in the third row of the square matrix M repeat the above small cycle, and the steps are as follows:

A: The knitting station in the second row of the square matrix M and the knitting station in the third row of the square matrix M rotate in the following way, and the steps are as follows:

(1) As shown in Figure 2 (20), knitting station m _2,1 , knitting station m _2,2 and knitting station m _2,3 located in the second row of the square matrix M rotate 180 counterclockwise around the axis at the same time °, the knitting station m _2,1 rotates to drive the knitter a _1,2 and the knitter a _2,1 on both sides to rotate 180° counterclockwise, so that the knitter a _1,2 and the knitter a _2,1 exchange positions; Knitting station m ₂ , 2 rotates 180° counterclockwise to drive knitter a 2, ₂ and knitter a ₃ , 2 on both sides to rotate 180° counterclockwise, so that knitter a 2, ₂ and knitter a ₃ , 2 are exchanged position, knitting station m _2,3 rotates 180° counterclockwise to drive knitter a _2,3 and knitter a _2,4 on both sides to rotate 180° counterclockwise, so that knitter a _2,3 and knitter a _{2, 4} exchange positions, form the arrangement as shown in Figure 2 (21);

(2) As shown in Figure 2 (21), knitting station m _3,1 , knitting station m _3,2 and knitting station m _3,3 located in the third row of the square matrix M rotate 180° clockwise at the same time , knitting station m _3,1 rotates 180° clockwise to drive knitter a _1,2 and knitter a _3,1 on both sides to rotate 180° clockwise, so that knitter a _1,2 and knitter a _3,1 Exchanging positions; knitting station m ₃ , 2 rotates clockwise to drive knitter a 2, ₂ and knitter a ₃ , 3 on both sides to rotate 180° clockwise, so that knitter a 2, ₂ and knitter a 3, ₃ Exchanging positions, knitting station m ₃ , 3 rotates clockwise to drive knitter a ₂ , 3 and knitter a ₃ , 4 on both sides to rotate 180° clockwise, so that knitter a ₂ , 3 and knitter a ₃ , 4 Exchange position, form the arrangement as shown in Figure 2 (22);

B: The knitting station in the second row of the square matrix M and the knitting station in the third row of the square matrix M repeat the above-mentioned rotation operation for the first time, and the steps are as follows:

(3) As shown in Fig. 2 (22), the knitting station m _2,1 , knitting station m _2,2 and knitting station m _2,3 located in the second row of the square matrix M repeat the step (1) Rotate in the same direction, that is, rotate counterclockwise at the same time, the knitting station m ₂ , 1 rotates 180° counterclockwise to drive the knitter a ₂ , 1 and knitter a ₃ , 1 on both sides of it to rotate 180° counterclockwise, so that the knitter a ₂ , 1 and knitter a ₃ , 1 exchange positions; knitting station m ₂ , 2 rotates counterclockwise to drive knitter a ₃ , 2 and knitter a ₃ , 3 on both sides of the knitting station to rotate 180° counterclockwise, so that knitter a ₃ , 2 and knitter a ₃ , 3 exchange positions, and knitting station m ₂ , 3 rotates counterclockwise to drive knitter a 2, ₄ and knitter a ₃ , 4 on both sides of the knitting station to rotate 180° counterclockwise, so that knitter a _2,4 exchange position with braider a _3,4 , form the arrangement as shown in Figure 2 (23);

(4) As shown in Figure 2 (23), the knitting station m _3,1 , knitting station m _3,2 and knitting station m _3,3 located in the third row of the square matrix M repeat this step (2) Rotate in the direction of , that is, rotate clockwise at the same time, the knitting station m ₃ , 1 rotates 180° clockwise to drive the knitter a ₂ , 1 and knitter a _{1, 2} on both sides of it to rotate 180° clockwise, so that the knitter a ₂ , 1 and knitter a _{1, 2} exchange positions; knitting station m ₃ , 2 rotates 180 ° clockwise to drive the knitter a ₃ , 2 and knitter a ₂ , 2 on both sides of the knitting station to rotate 180 ° clockwise, so that Knitters a ₃ , 2 and knitters a 2, ₂ exchange positions; knitting station m ₃ , 3 rotates 180° clockwise to drive knitters a _{2, 3} and knitters a ₂ , 4 on both sides to rotate 180° clockwise °, make braider a _2,3 and braider a _2,4 exchange positions, form the arrangement as shown in Figure 2 (24);

C: The knitting station in the second row of the square matrix M and the knitting station in the third row of the square matrix M repeat the above-mentioned rotation operation for the second time, and the steps are as follows:

(5) As shown in Fig. 2 (24), the knitting station m _2,1 , knitting station m _2,2 and knitting station m _2,3 located in the second row of the square matrix M repeat the step (1) Rotate in the same direction, that is, rotate counterclockwise at the same time, the knitting station m ₂ , 1 rotates 180° counterclockwise to drive the knitter a ₃ , 1 and knitter a _{1, 2} on both sides of it to rotate 180° counterclockwise, so that the knitter a _3,1 exchange positions with knitter a _1,2 ; the knitting station m _2,2 rotates counterclockwise to drive 180° to make knitter a _3,3 and knitter a _2,2 on both sides rotate 180° counterclockwise, so that Knitters a 3, ₃ and knitters a 2, ₂ exchange positions; knitting station m ₂ , 3 rotates counterclockwise to drive 180° to make knitters a 3, ₄ and knitters a ₂ , 3 on both sides rotate 180° counterclockwise °, make braider a _2,3 and braider a _3,4 exchange position, form the arrangement as shown in Figure 2 (25);

(6) As shown in Fig. 2 (25), the weaving station m _3,1 , the weaving station m _3,2 and the weaving station m _3,3 located in the third row of the square matrix M repeat the step (2) Rotate in the direction of , that is, rotate clockwise at the same time, the knitting station m ₃ , 1 rotates to drive the knitters a ₃ , 1 and knitters a ₂ , 1 on both sides to rotate 180° clockwise, so that the knitters a ₃ , 1 and Knitter a ₂ , 1 exchange positions; at the same time, knitting station m ₃ , 2 rotates 180° clockwise to drive knitter a 3, ₃ and knitter a ₃ , 2 on both sides to rotate 180° clockwise, so that knitter a _{3 , 3} and knitters a ₃ , 2 exchange positions, while knitting station m ₃ , 3 rotates 180° clockwise to drive knitters a 2, ₄ and knitters a ₃ , 4 on both sides of it to rotate 180° clockwise, so that knitting Device a _2,4 and braider a _3,4 exchange positions, form the arrangement as shown in Figure 2 (26), finish above-mentioned small cycle, now each braider all gets back to the initial position of this step, obtains braiding matrix B, Fig. 2 (26) and Fig. 2 (14) are same matrix;

Step 4):

In this step, as shown in Figure 2 (26), each knitter in the weaving matrix B of 4 rows and 3 columns rotates in the opposite direction with the path of each knitter in step 2), the rotation angle is constant, and the 4 rows The weaving matrix B with 3 columns becomes the weaving matrix A with 3 rows and 4 columns as shown in Fig. 2 (27).

Step 5): Repeat step 1)-step 4) many times to complete the weaving.

Wherein, in step 1), the rotation direction of each braider in each step is opposite, and the rotation angle is the same, and the obtained fabric structure has the same performance as the fabric to be protected in the present invention.

Wherein, in step 3), the rotation direction of each braider in each step is opposite, and the rotation angle is the same, and the obtained fabric structure has the same performance as the fabric to be protected in the present invention.

Wherein, in step 1) and step 3), the rotation directions of the first column and the first row in the square matrix M may also be the same.

Embodiment five:

The difference between the present embodiment and embodiment four is: in step 2), the transformation process of the weaving matrix A of 3 rows and 4 columns into the weaving matrix of 4 rows and 3 columns is, as shown in Figure 3 (13), located in the square matrix M The knitting station at the main diagonal rotates forward, driving the knitters on both sides to rotate forward 90°, and the knitting station at the lower triangle position on the main diagonal reverses, driving the knitter on the left to reverse 90°, The knitting station located at the triangular position on the main diagonal is reversed, and the knitting machine on its right side is reversed by 90°, and a knitting matrix B with 4 rows and 3 columns is obtained, as shown in Figure 3 (14);

As shown in Figure 4 (26), the direction of rotation of each knitter in step 4) is opposite to that of step 2), and the angle of rotation is the same as in step 2), and the transformation obtains the weaving matrix A of 3 rows and 4 columns, as shown in Figure 4 (27 ) The performance of the three-dimensional woven fabric obtained after the transformation is the same as that of the three-dimensional woven fabric obtained in Example 4.

Among them, the transformation of step 2) can be many kinds, as long as each knitter in the knitting matrix A in n rows (n+1) columns is satisfied, it rotates forward or reverses 90° around any adjacent knitting station respectively and In line with the principle of occupancy and avoidance, it is enough to arrange the knitters into a knitting matrix B with (n+1) rows and n columns; the element occupancy of the knitting matrix B produced by the transformation process is different, but the purpose of the transformation is to realize yarn The interweaving of threads, the final fabric structure and properties are the same.

Wherein, the forward rotation direction is clockwise or counterclockwise.

The above weaving process can be completed by using the three-dimensional automatic weaving machine of patent 201310356337.1.

The weaving station is expanded, and the square matrix M formed by the weaving station is 4th order, 5th order, 6th order...N order can prepare the three-dimensional fabric to be protected by the present invention according to the above-mentioned three-dimensional weaving process.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Without departing from the scope of the technical solution of the present invention, personnel can use the technical content of the above prompts to make some changes or modify them into equivalent embodiments with equivalent changes. In essence, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (5)

1. a kind of 3 D weaving technique, the 3 D weaving technique are completed on three dimensional knitting machine, and the three dimensional knitting machine includes Crochet and braiding station, crochet are arranged in the braiding matrix A that n rows (n+1) are arranged, and the braiding station is arranged on any phase of same a line Between two adjacent crochets, braiding station is made to be arranged in n rank square formations M, braiding station is around drive crochet while its axle rotation around volume Knit station to rotate, the rule motion for controlling crochet completes braiding, it is characterised in that comprise the following steps：

Step 1)：Positioned at square formation M the 1st row braiding station rotate, drive braiding station both sides crochet around the braiding station just After turning 180 °, the braiding station positioned at the row of square formation M the 2nd rotates, and drives the crochet of braiding station both sides to invert around the braiding station 180 °, after such recirculation 2 times, each crochet returns to the initial position of this step, completes a partial circulating；Then, the 2nd row with The above-mentioned partial circulating ... of braiding station repetition of the 3rd row is woven after the above-mentioned partial circulating of repetition of standing, respectively up to (n-1) row and the n-th row Crochet returns to the initial position of this step, re-forms the braiding matrix A that n rows (n+1) are arranged；

Step 2)：Each crochet in the braiding matrix A arranged positioned at n rows (n+1) is rotating around its any one adjacent braiding station 90 ° or 270 ° are rotated, makes crochet be arranged as the braiding matrix B of (n+1) row n row；

Step 3)：Positioned at the 1st row of square formation M braiding station rotate, drive braiding station both sides crochet around the braiding station just After turning or inverting 180 °, the braiding station rotation direction of the 2nd row is with the braiding station rotation direction of the 1st row conversely, driving braiding station two Around 180 ° of the braiding station rotating in same direction, after such recirculation 2 times, each crochet returns to the initial bit of this step to the crochet of side Put, complete a partial circulating；Then, the braiding station of the 2nd row and the 3rd row repeat above-mentioned partial circulating ... until (n-1) row and After the above-mentioned partial circulating of line n braiding station repetition, each crochet returns to the initial position of this step, (n+1) the row n row for re-forming Braiding matrix B；

Step 4)：Step 3) obtain (n+1) row n row braiding matrix B in each crochet according to step 2) identical road Footpath, rotation direction retrieve step 1 conversely, the anglec of rotation is identical) the braiding matrix A that arranges of the n rows (n+1) of initial position, it is complete Circulate into one；

Step 5)：Step 1 is repeated several times)-step 4), complete braiding.

2. a kind of 3 D weaving technique according to claim 1, it is characterised in that：The step 2) in, each crochet point Do not rotate around its any one adjacent braiding station, rotation direction is to rotate forward or invert.

3. according to a kind of arbitrary described 3 D weaving technique of claim 1-2, it is characterised in that：The step 2) in, general side Each braiding station element number in battle array M is m_{I, j}, each the crochet element number by braiding matrix A is a, and wherein i, j are for just Integer, in square formation M, as i=j, m_{I, j}Drive a_{I, j}And a_{I, j+1}Around m_{I, j}Rotate；As i ＞ j, m_{I, j}A is driven only_{I, j}Around m_{I, j} Rotate；As i ＜ j, m_{I, j}A is driven only_{I, j+1}Around m_{I, j}Rotate.

4. according to a kind of arbitrary described 3 D weaving technique of claim 1-3, it is characterised in that：The step 1) in, rotate forward Direction is clockwise or is counterclockwise.

5. the three dimensional fabric that prepared by 3 D weaving technique of the application as described in claim 1-4 is arbitrary.