A helical honeycomb lattice structure and a method of making the same

Abstract

The application discloses a spiral honeycomb lattice structure and a preparation method thereof, and belongs to the technical field of lattice structures. The spiral honeycomb lattice structure comprises an upper cover plate, a spiral honeycomb lattice unit and a lower cover plate, the upper cover plate and the lower cover plate are glued to the upper and lower surfaces of the spiral honeycomb lattice unit; the spiral honeycomb lattice unit is formed by connecting a plurality of unit cells, the unit cell comprises an upper honeycomb framework, a lower honeycomb framework, a positive spiral connecting rod and a reverse spiral connecting rod; the upper honeycomb framework and the lower honeycomb framework are polygonal frames with the same structure, the positive spiral connecting rod and the reverse spiral connecting rod are staggered and symmetrical, and are continuously wound in the positive and reverse directions on the upper honeycomb framework and the lower honeycomb framework, and are connected with the upper and lower honeycomb frameworks through spiral joints. The lattice structure is prepared layer by layer in a suspension mode, and is shaped through a mold, so that high-efficiency and stable preparation is realized. The spiral honeycomb lattice structure provided by the application has the performance of light weight, high specific strength and impact resistance, can adapt to complex load environments, and has the characteristics of being prepared.

Description

Technical Field

[0001] This invention belongs to the field of lattice structure technology, and in particular relates to a spiral honeycomb lattice structure and its preparation method. Background Technology

[0002] Lattice structures are widely used in aerospace, medical, industrial energy and other fields due to their excellent mechanical properties, controllability and designability, as well as their high specific strength, impact resistance, lightweight and high strength.

[0003] In existing technologies, due to application and functional requirements, lattice structures currently face limitations in manufacturing processes, bottlenecks in mechanical performance, and design complexities caused by structural diversity. For example, Chinese patent CN201810615351.1 discloses a lightweight spatial lattice structure, which forms a lattice structure by arranging multiple connecting rods with staggered vertices of upper and lower polygonal frames around a central circumference to achieve a lightweight structure. However, because the connecting rods are aligned in the same direction, they lack isotropy, and splicing is used at the connection nodes, resulting in reduced strength and structural stability. Chinese patent CN202110911799.X discloses a honeycomb-shaped regular hexagonal lattice material structure, which uses two sets of symmetrical hexagonal pyramidal structures connected by their vertices to form a honeycomb structure. This method gives the structure good load-bearing capacity when subjected to loads in all directions; however, stress concentration is prone to occur at the convergence point of the central vertices, and the processing of the vertices is relatively complicated.

[0004] Therefore, developing a lightweight, high-strength, structurally stable lattice structure that is also moldable is of great significance to this field. Summary of the Invention

[0005] The purpose of this invention is to provide a spiral honeycomb lattice structure and its preparation method.

[0006] To achieve the objectives of this invention, the technical solution adopted is as follows: A spiral honeycomb lattice structure includes an upper mask, a spiral honeycomb lattice unit, and a lower mask. The upper and lower masks are bonded to the upper and lower surfaces of the spiral honeycomb lattice unit. The spiral honeycomb lattice unit is formed by interconnecting several unit cells. Each unit cell includes an upper honeycomb skeleton, a lower honeycomb skeleton, a positive spiral link, and a negative spiral link. The upper and lower honeycomb skeletons are polygonal frames with identical structures, arranged parallel to each other and aligned vertically. The positive and negative spiral links are alternately wound in pairs and continuously around the upper and lower honeycomb skeletons. Furthermore, the upper and lower honeycomb skeletons are connected to each other at the endpoints and midpoints of each side of the polygonal frame through spiral knots.

[0007] Furthermore, the upper mask, the spiral honeycomb lattice unit, and the lower mask are parallel to each other; the materials used for the upper mask, the spiral honeycomb lattice unit, and the lower mask include, but are not limited to, carbon fiber.

[0008] Furthermore, the spiral honeycomb lattice unit is provided with at least one layer, and a single layer of spiral honeycomb lattice unit is formed by the periodic arrangement of unit cells in a plane.

[0009] Furthermore, the spiral honeycomb lattice unit is provided in two or more layers, and the spiral honeycomb lattice unit in two or more layers is formed by arranging the single cells of the first layer along its planar normal.

[0010] Furthermore, the polygonal frame is in the shape of a regular square, regular pentagon, regular hexagon, or regular octagon.

[0011] Furthermore, the included angles between the positive and negative spiral connecting rods and the lower honeycomb skeleton are equal, and both are 15~75°, more preferably 30~60°.

[0012] Furthermore, the spiral knot is formed by spiraling positive and negative spiral connecting rods on the upper and lower honeycomb skeletons for at least 1.5 turns.

[0013] To achieve the objective of this invention, this invention also discloses a method for preparing any of the above-mentioned spiral honeycomb lattice structures. This method employs a suspension method, weaving layer by layer from top to bottom along the surface of the spiral honeycomb lattice unit, starting from a vertex of a single cell. Specifically, it includes the following steps: Step 1: Install the hanging plate and fix it to the machine platform; Step 2: Arrange two rows of N columns of fibers on the front and back of the suspension board. The row spacing is the unit cell height H, and the column spacing is the projection length of the unit cell side length L on the horizontal plane. The unit cell surface is perpendicular to the horizontal plane. Step 3: Insert the starting mold between each column to support the honeycomb skeleton. The shape and size of the starting mold are the same as the unit cell, except that its upper side is cut into a flat surface so that the flat surface can fit against the lower side of the suspension plate. Step 4: Define the first plane connecting the first vertex of all units as layer I. Divide the fiber at the node into four strands at layer I. Two strands serve as the upper and lower honeycomb skeleton fibers, and two strands serve as the positive and negative helical links. Separate the fibers serving as the positive and negative helical links to both sides. Simultaneously separate the fibers serving as the upper and lower honeycomb skeleton fibers to both sides. Starting from the node, make the positive and negative helical links symmetrically spirally wound on the upper and lower honeycomb skeletons, and form a helical knot at the starting point I, midpoint, and intersection II on each side of the upper and lower honeycomb skeletons. Step 5: Define the second plane connecting the second vertices of all unit cells as layer II. At layer II, the fibers that serve as the upper and lower honeycomb skeletons are stranded together and fixed by a spiral knot. The fibers that serve as the positive and negative spiral connecting rods are stranded together and continue to be symmetrically spirally wound on the stranded upper and lower honeycomb skeletons to form the preliminary unit cell structure. Insert the shaping mold into each unit cell that has been initially wound. Step 6: Repeat steps 4 to 6 until the preparation and sample cutting of the spiral honeycomb lattice unit is completed; Step 7: Impregnate the spiral honeycomb lattice unit prepared in step 6 with resin and cure it. Step 8: Lay the upper and lower cover plates on the top and bottom surfaces of the cured spiral honeycomb lattice unit respectively and bond them together to complete the preparation of the spiral honeycomb lattice structure.

[0014] Furthermore, the suspension plate has multiple rows and columns of fiber suspension points in a matrix form, which are used for fiber fixing and weaving start of the multi-layer spiral honeycomb lattice unit. Adjacent spiral honeycomb lattice units are connected by sharing a honeycomb skeleton.

[0015] Furthermore, each time the fibers are twisted or split, the fiber thickness of the honeycomb skeleton and the spiral connecting rod must be kept consistent.

[0016] Furthermore, the shaping mold is fitted to the honeycomb skeleton of the spiral honeycomb lattice unit and inserted from the direction perpendicular to the shape of the spiral honeycomb lattice unit during preparation; this is used to maintain shape stability and ensure dimensional accuracy during the preparation process.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1) It has a flexibly designable lattice skeleton structure, and the surface structure, side length, height and other parameters of the spiral honeycomb lattice unit can be flexibly designed to meet the needs of different loads; 2) It has a stable positive and negative helical connecting rod and helical knot structure, which can improve the stability of the overall structure and have good load response performance; 3) The suspended preparation method is adopted to weave spiral honeycomb lattice units layer by layer from top to bottom. During the weaving process, the unit cell structure is fixed by the forming mold to ensure its dimensional accuracy. The preparation method of the present invention has convenient processing technology. Attached Figure Description

[0018] Figure 1 This is an isometric view of the spiral honeycomb lattice structure of Embodiment 1 of the present invention.

[0019] Figure 2 This is a single-cell structure diagram of the helical honeycomb lattice unit in Embodiment 1 of the present invention.

[0020] Figure 3This is a diagram of a single-side structure of a unit cell in Embodiment 1 of the present invention.

[0021] Figure 4 This is a schematic diagram of the suspended preparation method of Embodiment 1 of the present invention.

[0022] Figure 5 This is a structural diagram of the spiral honeycomb lattice unit of Embodiment 2 of the present invention.

[0023] Figure 6 This is a structural diagram of the spiral honeycomb lattice unit of Embodiment 3 of the present invention.

[0024] Explanation of reference numerals in the attached diagram: 1-Upper mask, 2-Spiral honeycomb matrix unit, 21-Upper honeycomb skeleton, 22-Lower honeycomb skeleton, 23-Positive spiral connecting rod, 24-Reverse spiral connecting rod, 25-Spiral knot, 3-Lower mask, 4-Suspension plate, 5-Pentagonal mold, 6-Hexagonal mold. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0026] like Figure 1 As shown, the present invention proposes a honeycomb spiral dot matrix structure, including an upper cover plate 1, a spiral honeycomb dot matrix unit 2 and a lower cover plate 3. The upper and lower cover plates are respectively fixed to the upper and lower surfaces of the spiral honeycomb dot matrix unit 2 by adhesive bonding and are parallel to each other, for bearing external loads.

[0027] In this embodiment, the spiral honeycomb lattice unit 2 adopts a honeycomb structure with a regular hexagonal shape. Its unit cell structure includes an upper honeycomb skeleton 21 and a lower honeycomb skeleton 22 that are parallel to each other and aligned, and a pair of staggered and symmetrical positive spiral links 23 and negative spiral links 24 that are continuously wound between the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22. The upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are respectively connected to the upper mask plate 1 and the lower mask plate 3. The positive and negative spiral links 23 and 24 are wound sequentially and spirally on the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22, respectively, to fix them and ensure the stable support of the entire lattice structure.

[0028] The upper mask 1, the spiral honeycomb dot matrix unit 2, and the lower mask 3 can all be made of carbon fiber, but are not limited to carbon fiber.

[0029] In this embodiment, as Figure 2 and Figure 3As shown, the unit cell structure of the spiral honeycomb lattice unit 2 is a regular hexagon with side length L and height H. The positive spiral connecting rod 23 first wraps around the left end of the lower honeycomb skeleton 22 once, and then moves upward at a certain angle. Reaching the midpoint L / 2 of one side of the upper honeycomb skeleton 21, the spiral knot 25 is formed after at least 1.5 turns, and then repeated downwards to the right end of the lower honeycomb skeleton 22. Similarly, the anti-spiral connecting rod 24 is wound at the left end of the upper honeycomb skeleton 21, the midpoint of one side of the lower honeycomb skeleton 22, and the right end of the upper honeycomb skeleton 21, respectively. Finally, the combination of the upper and lower honeycomb skeletons and the positive and negative spiral rods forms a spiral honeycomb lattice unit structure. The spiral honeycomb lattice unit 2 is fixed and its structure is maintained by the spiral knot 25. When subjected to external loads, the force is released to other parts of the structure through the spiral knot 25, achieving load-bearing and impact resistance. A pair of positive and negative spiral connecting rods connecting the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are wound in pairs, staggered from each other, and spiral forward.

[0030] In this embodiment, as Figure 4 As shown, the suspended fabrication method of the above-mentioned honeycomb spiral lattice structure includes the following steps: Step 1: Install the suspension plate 4 and fix it to the machine platform; Step 2: Arrange two rows of N columns of carbon fiber on the suspension plate 4, with the row spacing equal to the vertical distance between the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22, i.e., the height of the unit cell; the column spacing is... Side length, Step 3: Insert pentagonal molds 5 between the columns to support the honeycomb skeleton; Step 4: At layer I, the fibers are split into four strands, two of which serve as the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22, and two of which serve as the positive spiral connecting rod 23 and the negative spiral connecting rod 24. The fibers serving as the positive and negative spiral connecting rods are separated to both sides, and the fibers serving as the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are simultaneously separated to both sides. Starting from the node, the positive spiral connecting rod 23 and the negative spiral connecting rod 24 are symmetrically spirally wound on the upper and lower honeycomb skeletons, and spiral knots 25 are formed at the starting point I, the middle section, and the intersection point II on each side of the upper and lower honeycomb skeletons. Step 5: At layer II, the fibers serving as the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are stranded together and fixed by a spiral knot 25. The fibers serving as the positive spiral connecting rod 23 and the negative spiral connecting rod 24 are stranded together and then symmetrically spirally wound on the stranded upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 to prepare the side length of section II to III. Step 6: Insert hexagonal molds 6 sequentially into the initially formed unit cell to form a honeycomb structure; Step 7: Continue to separate the fibers that serve as the positive and negative helical connecting rods at layer III, and repeat the operation of step 4 to prepare the side length of section III to IV; Step 8: At layer IV, the fibers serving as the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are stranded together and fixed by the spiral knot 25. The fibers serving as the positive spiral connecting rod 23 and the negative spiral connecting rod 24 are stranded together and symmetrically spiral wound to prepare the side length of the IV~V segment. Step 9: Repeat steps 4 to 8 until the preparation and sample cutting of the spiral honeycomb lattice unit 2 are completed; Step 10: Impregnate the spiral honeycomb lattice unit 2 prepared in step 9 with resin and cure it; Step 11: Lay the upper mask 1 and the lower mask 3 on the upper and lower surfaces of the cured spiral honeycomb lattice unit 2 respectively and glue them together to complete the preparation of the spiral honeycomb lattice structure.

[0031] In this embodiment, the suspension plate 4 has two rows of multi-column fiber suspension points, with the rows aligned front to back and spaced at intervals of H. The fiber spacing between columns is [missing information]. The weaving process proceeds layer by layer from top to bottom, starting with the suspension plate 4. During the plying and splitting operations beginning at layer I, the fiber thickness ratio is 1:2 to ensure that the diameter of each side of the final honeycomb structure is the same, resulting in uniform cross-sectional dimensions and consistent thickness. The pentagonal mold 5 serves as the starting point for weaving, while the hexagonal mold 6 maintains the cell size of the honeycomb structure. It is inserted vertically into the weaving fibers from the side and fits snugly against the upper and lower honeycomb skeletons to maintain dimensional accuracy. Example 2

[0032] This embodiment improves upon embodiment 1 by arraying the spiral honeycomb lattice units 2 along their planar normal direction, expanding them into a multi-layer structure, such as... Figure 5 As shown, the spiral honeycomb lattice unit 2 has two layers, with a total height of 2H, and each layer has three layers of single cells: upper, middle and lower.

[0033] The preparation process of Example 2 is basically the same as that of Example 1. The only difference is that, based on the above steps 1 to 11, when suspending the fibers, 3 rows and N columns of fibers are arranged on the suspension plate 4, with a spacing of H between the rows and two adjacent rows sharing a honeycomb skeleton; the same winding method is adopted, and a stable lattice structure is formed through the positive and negative spiral connecting rods 23 and 25 and the spiral knot 25 formed by winding.

[0034] In other embodiments, the number of unit cell layers can be further expanded to 4 or 5 layers, depending on functional and structural requirements. Example 3

[0035] The difference between this embodiment and Embodiment 1 is that, Figure 6 As shown, the unit cell structure of the honeycomb skeleton is quadrilateral, and the side lengths of the honeycomb skeleton are L1 and L2. The values ​​of L1 and L2 can be designed as needed.

[0036] The preparation method in this embodiment differs from that in Embodiment 1 in that the shaping mold in steps 1 to 11 is replaced with a quadrilateral mold, and the number of weaving layers is reduced accordingly. Specifically, it includes: Step 1: Install the suspension plate 4 and fix it to the machine platform; Step 2: Arrange two rows of N columns of carbon fibers on the suspension plate 4, with the row spacing being the height of the unit cell and the column spacing being the length of the orthographic projection of the side length of the unit cell. Step 3: Insert pentagonal molds between the columns to support the honeycomb skeleton; Step 4: Define the first plane connecting the first vertex of all units as layer I. At layer I, divide the fibers into four strands: two strands for the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22, and two strands for the positive spiral link 23 and the negative spiral link 24. Separate the fibers serving as the positive and negative spiral links to both sides, and simultaneously separate the fibers serving as the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 to both sides. Starting from the node, make the positive spiral link 23 and the negative spiral link 24 symmetrically spirally wound on the upper and lower honeycomb skeletons, and form a spiral knot 25 at the starting point I, the middle section, and the intersection point II on each side of the upper and lower honeycomb skeletons; prepare the side lengths of the two sides of the I-II segments. Step 5: Set the first plane connecting the second and third vertices of all unit cells as layer II. At layer II, the fibers that serve as the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are stranded together, and the fibers that serve as the positive helical link 23 and the negative helical link 24 are stranded together. The upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are fixed by the helical knot 25. The quadrilateral mold is inserted into the initially formed unit cell in sequence. Step 6: At the 2nd and 3rd junctions, the fibers serving as the upper honeycomb skeleton 21 and the lower honeycomb skeleton 22 are separated to both sides, and the fibers serving as the positive and negative helical connecting rods are separated to both sides. Taking the junction as the starting point, the positive helical connecting rod 23 and the negative helical connecting rod 24 are symmetrically helically wound on the upper and lower honeycomb skeletons, and helical knots 25 are formed at the starting point I, the middle section, and the intersection point II on each side of the upper and lower honeycomb skeletons; prepare the side lengths of the two sides of the II~III segments; Step 7: Repeat steps 4 to 6 until the preparation and sample cutting of the spiral honeycomb lattice unit 2 are completed; Step 8: Impregnate the spiral honeycomb lattice unit 2 prepared in step 7 with resin and cure it; Step 9: Lay the upper mask 1 and the lower mask 3 on the upper and lower surfaces of the cured spiral honeycomb lattice unit 2 respectively and glue them together to complete the preparation of the spiral honeycomb lattice structure. In other embodiments, the surface of the spiral honeycomb lattice unit 2 can also be one or a combination of two of the following shapes: triangular, pentagonal, and octagonal. The preparation principle is the same as in Example 1.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spiral honeycomb lattice structure, characterized in that, The device includes an upper mask (1), a spiral honeycomb lattice unit (2), and a lower mask (3). The upper mask (1) and the lower mask (3) are bonded to the upper and lower surfaces of the spiral honeycomb lattice unit (2). The spiral honeycomb lattice unit (2) is formed by connecting several unit cells. The unit cell includes an upper honeycomb skeleton, a lower honeycomb skeleton, a positive spiral link, and a negative spiral link. The upper honeycomb skeleton and the lower honeycomb skeleton are polygonal frames with the same structure. They are parallel and aligned vertically. The positive spiral link and the negative spiral link are alternately rotated and continuously wound in pairs on the upper and lower honeycomb skeletons. The upper and lower honeycomb skeletons are connected to each other at the endpoints and midpoints of each side of the polygonal frame through spiral knots.

2. The spiral honeycomb lattice structure according to claim 1, characterized in that, The upper mask (1), the spiral honeycomb matrix unit (2), and the lower mask (3) are parallel to each other.

3. The spiral honeycomb lattice structure according to claim 1, characterized in that, The spiral honeycomb lattice unit (2) is provided with at least one layer, and a single layer of spiral honeycomb lattice unit is formed by the periodic arrangement of unit cells in a plane.

4. The spiral honeycomb lattice structure according to claim 3, characterized in that, The spiral honeycomb lattice unit (2) has two or more layers, and the spiral honeycomb lattice unit (2) with two or more layers is formed by the array of single cells of the first layer along its plane normal.

5. The spiral honeycomb lattice structure according to claim 1, characterized in that, The polygonal frame is in the shape of a regular square, a regular hexagon, or a regular octagon.

6. The spiral honeycomb lattice structure according to claim 1, characterized in that, The included angles between the positive and negative helical connecting rods and the lower honeycomb skeleton are equal, and both are 15~75°.

7. The spiral honeycomb lattice structure according to claim 1, characterized in that, The spiral knot (25) is formed by spiraling the positive and negative spiral connecting rods around the upper and lower honeycomb skeleton at least 1.5 times.

8. The method for preparing the spiral honeycomb lattice structure according to any one of claims 1 to 7, characterized in that, Using a suspension method, the spiral honeycomb lattice unit is woven layer by layer from top to bottom, starting from one vertex of a single cell. The specific steps include: Step 1: Install the hanging plate (4) and fix it on the machine platform; Step 2: Arrange two rows of N columns of fibers on the suspension plate (4), with the row spacing being the height of the unit cell and the column spacing being the length of the orthographic projection of the unit cell on the horizontal plane. The unit cell surface is perpendicular to the horizontal plane. Step 3: Insert the starting mold between each column to support the honeycomb skeleton. The shape and size of the starting mold are the same as the unit cell, except that its upper side is cut into a plane so that the plane can fit against the lower side of the suspension plate (4). Step 4: Define the first plane connecting the first vertex of all units as layer I. Divide the fiber at the node into four strands at layer I. Two strands serve as the fibers of the upper and lower honeycomb skeletons, and the other two strands serve as the fibers of the positive and negative helical links. Separate the fibers serving as the positive and negative helical links to both sides. At the same time, separate the fibers serving as the upper and lower honeycomb skeletons to both sides. Starting from the node, make the positive and negative helical links symmetrically spirally wound on the upper and lower honeycomb skeletons, and form a helical knot (25) at the starting point I, midpoint, and intersection II on each side of the upper and lower honeycomb skeletons. Step 5: Set the second plane connecting the second vertex of all units as layer II. At layer II, the fibers that serve as the upper and lower honeycomb skeletons are stranded together and fixed by a spiral knot (25). The fibers that serve as the positive and negative spiral connecting rods are stranded together and continue to be symmetrically spirally wound on the upper and lower honeycomb skeletons after stranding to form the initial structure of the unit cell. Insert the shaping mold into each unit cell that has been initially wound into shape in sequence. Step 6: Repeat steps 4 to 5 until the spiral honeycomb lattice unit (2) is prepared and sampled; Step 7: Impregnate the spiral honeycomb lattice unit (2) prepared in step 6 with resin and cure it; Step 8: Lay the upper mask (1) and the lower mask (3) on the upper and lower surfaces of the cured spiral honeycomb lattice unit (2) respectively and glue them together to complete the preparation of the spiral honeycomb lattice structure.

9. The preparation method according to claim 8, characterized in that, The suspension plate (4) has multiple rows and columns of fiber suspension points in a matrix form, which are used for fiber fixing and weaving start of the multi-layer spiral honeycomb matrix unit (2); adjacent two layers of spiral honeycomb matrix units (2) are connected by sharing a honeycomb skeleton.

10. The preparation method according to claim 8, characterized in that, Each time the fibers are twisted or split, the fiber thickness of the honeycomb skeleton and the spiral connecting rod must be kept consistent.

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