A reinforcing rib and a forming mechanism and forming method thereof

Abstract

This invention provides a reinforcing rib, its forming mechanism, and forming method, belonging to the field of composite material manufacturing technology. The reinforcing rib is used to connect between a first wall surface and a second wall surface to provide support for both. The reinforcing rib includes a first support plate, a second support plate, a first diagonal brace, and a second diagonal brace. The first and second support plates are arranged at an included angle, with the first support plate connecting to the first wall surface and the second support plate connecting to the second wall surface. Both the first and second diagonal braces are located between the first and second support plates. One end of each of the first and second diagonal braces is connected to different positions in the longitudinal direction of the first support plate, and the other end of each is connected to different positions in the longitudinal direction of the second support plate. The first and second diagonal braces are also staggered in the transverse direction of the reinforcing rib. According to this invention, the transverse buckling resistance of the reinforcing rib can be improved.

Description

Technical Field

[0001] This invention belongs to the field of composite material manufacturing technology, specifically relating to a reinforcing rib and its forming mechanism and forming method. Background Technology

[0002] Thin-walled structures are common in cutting-edge fields such as shipbuilding, marine engineering, military industry, aviation, and aerospace engineering. The core characteristic of thin-walled structures is the extremely small ratio of wall thickness to structural feature dimensions (such as length, span, and diameter). They generally suffer from insufficient stiffness, susceptibility to buckling instability, and weak load-bearing capacity, and face stringent requirements for lightweight design, making it impossible to improve performance simply by thickening the walls. Adding stiffeners to thin-walled structures can significantly improve the load-bearing capacity of the components. These stiffeners can connect two walls arranged at an angle, such as a first wall and a second wall, allowing both walls to be supported by the stiffeners. For example... Figure 1 As shown, the reinforcing rib in the prior art has a diagonal brace 1', one end of which is connected to the first wall surface 200 and the other end is connected to the second wall surface 300. The reinforcing rib provides support to the first wall surface 200 and the second wall surface 300 through the diagonal brace 1'.

[0003] Among them, the diagonal brace 1' mainly provides vertical support to resist vertical deformation. The diagonal brace 1' has weak buckling resistance in the lateral direction and is prone to lateral bending, torsion or bulging failure, which leads to the failure of the stiffener. Therefore, this problem needs to be addressed. Summary of the Invention

[0004] Therefore, the present invention provides a reinforcing rib and its forming mechanism and forming method, and the main technical problem to be solved is: how to improve the resistance to transverse buckling of the reinforcing rib.

[0005] To address the aforementioned problems, the present invention provides a reinforcing rib for connecting a first wall surface and a second wall surface that are angled together, thereby supporting both the first and second wall surfaces. The reinforcing rib includes a first support plate, a second support plate, a first diagonal brace, and a second diagonal brace. The first and second support plates are angled together, with the first support plate connecting to the first wall surface and the second support plate connecting to the second wall surface. Both the first and second diagonal braces are located between the first and second support plates. One end of each diagonal brace is connected to a different position in the longitudinal direction of the first support plate, and the other end is connected to a different position in the longitudinal direction of the second support plate. Furthermore, the first and second diagonal braces are staggered in the transverse direction of the reinforcing rib.

[0006] In some embodiments, the first support plate has a first A end and a second A end along its longitudinal direction, with the first A end being disposed close to the second support plate relative to the second A end; the first A end is provided with a first A connecting portion and a second A connecting portion in sequence in the transverse direction of the reinforcing rib, and a first step groove is formed between the first A connecting portion and the second A connecting portion; the first support plate is connected to one end of the first diagonal brace through the first A connecting portion, and is also connected to one end of the second diagonal brace through the second A connecting portion.

[0007] In some embodiments, the second support plate has a first B end and a second B end opposite to each other along its longitudinal direction, with the first B end being disposed close to the first support plate relative to the second B end; the first B end is provided with a first B connecting portion and a second B connecting portion in sequence in the transverse direction of the reinforcing rib, and a second step groove is formed between the first B connecting portion and the second B connecting portion; the second support plate is connected to the other end of the first diagonal brace through the first B connecting portion, and is also connected to the other end of the second diagonal brace through the second B connecting portion.

[0008] In some embodiments, the present invention also provides a molding mechanism for molding the reinforcing rib described in any of the above embodiments, comprising an openable upper mold and a lower mold, the upper mold having an upper molding structure and the lower mold having a lower molding structure; wherein, when the upper mold and the lower mold are closed, a cavity is formed between the upper molding structure and the lower molding structure, the cavity being used to accommodate molding material to mold the reinforcing rib.

[0009] In some embodiments, when there are two first diagonal braces and they are symmetrically arranged on both sides of the second diagonal brace, the lower mold forming structure and the upper mold forming structure are inserted into each other to form a nested structure when the upper mold and the lower mold are closed. The upper mold and the lower mold are positioned by the nested structure when they are closed.

[0010] In some embodiments, the present invention also provides a molding method for forming the above-mentioned reinforcing rib, which includes the following steps: laying two or more carbon fiber prepreg layers sequentially on a molding mechanism, such that each carbon fiber prepreg layer has a structure consistent with the reinforcing rib, and then curing each carbon fiber prepreg layer; wherein, each carbon fiber prepreg layer has a splicing portion after being laid on the molding mechanism, and the splicing portions on each adjacent carbon fiber prepreg layer are staggered.

[0011] In some embodiments, at least a portion of the carbon fiber prepreg layer is a monolithic structure.

[0012] In some embodiments, each of the carbon fiber prepreg layers includes carbon fiber prepreg layer A, carbon fiber prepreg layer B, carbon fiber prepreg layer C, and carbon fiber prepreg layer D; wherein, the splice portion on carbon fiber prepreg layer A is located on the second diagonal brace, the splice portion on carbon fiber prepreg layer B is located on the first diagonal brace, the splice portion on carbon fiber prepreg layer C is located on the second support plate, and the splice portion on carbon fiber prepreg layer D is located on the first support plate.

[0013] In some embodiments, when there are two first diagonal braces symmetrically arranged on both sides of the second diagonal brace, the A carbon fiber prepreg layer is an integral structure. The A carbon fiber prepreg layer has a first A cutting line and a second A cutting line arranged at intervals in the middle. An A region is formed between the first A cutting line and the second A cutting line. A first through hole is provided in the middle of the A region. The first through hole extends from the first A cutting line to the second A cutting line to divide the A region into a first A sub-region and a second A sub-region. When the A carbon fiber prepreg layer is laid on the molding mechanism, the ends of the first A sub-region and the second A sub-region are spliced ​​together to form the second diagonal brace.

[0014] In some embodiments, when there are two first diagonal braces symmetrically arranged on both sides of the second diagonal brace, the B carbon fiber prepreg layer has a second A prepreg block and two second B prepreg blocks; the second A prepreg block has a first side and a second side opposite to each other, and the second A prepreg block has a first B cutting line and a second B cutting line arranged alternately between the first side and the second side, the first B cutting line being closer to the first side than the second B cutting line, the second A prepreg block having a first break at the middle between the first B cutting line and the first side, and the second A prepreg block having a second break at the middle between the second B cutting line and the second side; when the B carbon fiber prepreg layer is laid on the molding mechanism, one second B prepreg block is spliced ​​at the first break, and the other second B prepreg block is spliced ​​at the second break, and the two second B prepreg blocks each form part of a first diagonal brace.

[0015] In some embodiments, when there are two first diagonal braces symmetrically arranged on both sides of the second diagonal brace, the C carbon fiber prepreg layer is an integral structure. The C carbon fiber prepreg layer has a first C-cut line and a second C-cut line arranged sequentially at intervals in the middle. Both the first C-cut line and the second C-cut line extend to a designated A side of the C carbon fiber prepreg layer. A B region is formed between the first C-cut line and the second C-cut line. The B region has a third break at the designated A side. When the C carbon fiber prepreg layer is laid on the molding mechanism, the end section of the B region covers the third break to form part of the second support plate.

[0016] In some embodiments, when there are two first diagonal braces symmetrically arranged on both sides of the second diagonal brace, the D carbon fiber prepreg layer is an integral structure. The D carbon fiber prepreg layer has a first D-cut line and a second D-cut line arranged sequentially at intervals in the middle. Both the first D-cut line and the second D-cut line extend to a designated B side of the D carbon fiber prepreg layer. A C region is formed between the first D-cut line and the second D-cut line. The C region has a fourth break at the designated B side. When the D carbon fiber prepreg layer is laid on the molding mechanism, the end section of the C region covers the fourth break to form part of the first support plate.

[0017] The reinforcing rib, its forming mechanism, and forming method provided by this invention have the following beneficial effects:

[0018] 1. This invention connects one end of the first and second diagonal braces to different positions in the longitudinal direction of the first support plate, and the other end of the first and second diagonal braces to different positions in the longitudinal direction of the second support plate. Furthermore, the first and second diagonal braces are staggered in the transverse direction of the reinforcing ribs. This creates a cross / nested spatial structure, supporting the corner between the first and second walls from different angles and planes. This constructs a spatial truss-type multi-point support system, fundamentally changing the structure of the reinforcing ribs. The stress distribution is more uniform and rational, achieving three-dimensional deformation constraint on the corner walls and limiting the deformation of the reinforcing ribs in the transverse direction, thereby improving the transverse buckling resistance of the reinforcing ribs.

[0019] 2. When the upper and lower molds of the present invention are closed, they are positioned by a nested structure formed by the lower mold forming structure and the upper mold forming structure inserting into each other. This eliminates the need for additional positioning mechanisms such as guide pillars on the upper and lower molds to position them during mold closing, thereby simplifying the structure and saving costs.

[0020] 3. By staggering the splices on adjacent carbon fiber prepreg layers, this invention disperses weak points on each prepreg layer in different planar locations. The continuous fibers of adjacent layers "bridge" the splice seams, maintaining the load transfer path. This prevents multiple layers of weak points from overlapping, avoiding the formation of penetrating weak zones and preventing cracks from directly penetrating the entire thickness along the seam, thus ensuring the overall structural strength and resistance to delamination.

[0021] 4. The overall reinforcing rib structure of this invention is made of carbon fiber composite material, which is 40% to 80% lighter than metal materials of the same size. While being lightweight, it also has the advantages of designable structure and performance; it naturally has the advantages of corrosion resistance and fatigue resistance, and has a long service life.

[0022] 5. The design of the prepreg shape in this invention takes into account the convenience of operation, making the layup operation relatively convenient and simple, and resulting in high production efficiency.

[0023] 6. The present invention has various methods for fixing the reinforcing ribs, which are suitable for a variety of scenarios. It can be fixed by one or more of the following methods: bonding, riveting, screwing, and co-curing processes. The overall reinforcing rib structure can strengthen the right-angle bends of thin-walled structures, and the thin-walled structures are not limited to planes, curved surfaces, or a combination of planes and curved surfaces. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the existing technology of connecting reinforcing ribs between the first and second wall surfaces;

[0026] Figure 2 This is a schematic diagram of the reinforcing ribs of the present invention connected between the first wall surface and the second wall surface;

[0027] Figure 3 This is a schematic diagram of the reinforcing rib structure of the present invention;

[0028] Figure 4 yes Figure 3 Dimensional diagram of the central reinforcing rib;

[0029] Figure 5 This is a schematic diagram of the molding mechanism of the present invention when the upper and lower molds are closed;

[0030] Figure 6 This is a schematic diagram of the upper mold of the molding mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of the lower mold of the molding mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the shape design of the A carbon fiber prepreg layer of the present invention;

[0033] Figure 9 This is a schematic diagram of the shape of the carbon fiber prepreg layer of the present invention when it is laid on the molding mechanism.

[0034] Figure 10 This is a schematic diagram of the shape design of the B carbon fiber prepreg layer of the present invention;

[0035] Figure 11 This is a schematic diagram of the shape of the B carbon fiber prepreg layer of the present invention when it is laid on the molding mechanism.

[0036] Figure 12 This is a schematic diagram of the shape design of the C carbon fiber prepreg layer of the present invention;

[0037] Figure 13 This is a schematic diagram of the shape of the C carbon fiber prepreg layer of the present invention when it is laid on the molding mechanism.

[0038] Figure 14 This is a schematic diagram of the shape design of the D-type carbon fiber prepreg layer of the present invention;

[0039] Figure 15 This is a schematic diagram of the shape of the D carbon fiber prepreg layer of the present invention when it is laid on the molding mechanism.

[0040] Figure 16 This is a schematic diagram of the thin-walled structure of the first example of the present invention;

[0041] Figure 17 This is a schematic diagram of a thin-walled structure according to a second example of the present invention;

[0042] Figure 18 This is a schematic diagram of the thin-walled structure of the third example of the present invention;

[0043] Figure 19 This is a schematic diagram of the thin-walled structure of the fourth example of the present invention.

[0044] The attached figures are labeled as follows:

[0045] 1. Reinforcing rib; 2. Upper mold; 3. Lower mold; 10. A. Carbon fiber prepreg layer; 11. B. Carbon fiber prepreg layer; 11a. First side; 11b. Second side; 12. C. Carbon fiber prepreg layer; 12a. Setting A side; 13. D. Carbon fiber prepreg layer; 13a. Setting B side; 21. Upper mold forming structure; 31. Lower mold forming structure; 41. First support member; 42. First square tube; 43. Second square tube; 44. Second support member; 45. Circular tube; 46. First circular tube; 47. Second circular tube; 48. Third circular tube; 100. Splicing part; 101. First A cutting line; 102. Second A cutting line; 103. First through hole; 104. A Regions; 111, Second A prepreg block; 112, Second B prepreg block; 121, First C cutting line; 122, Second C cutting line; 123, Third fracture; 124, Region B; 131, First D cutting line; 132, Second D cutting line; 133, Fourth fracture; 134, Region C; 200, First wall surface; 300, Second wall surface; 301, Left horizontal mating surface of the lower mold; 302, First middle mating surface of the lower mold; 303, Right horizontal mating surface of the lower mold; 304, Second middle mating surface of the lower mold; 401, First support plate forming surface of the lower mold; 402, Second support plate forming surface of the lower mold; 403, First diagonal brace forming surface of the lower mold Surface; 405, Second inclined support forming surface of the lower mold; 501, Glue overflow groove of the lower mold; 502, Glue overflow groove of the upper mold; 601, Chamfer of the lower mold; 602, Chamfer of the upper mold; 701, Left horizontal bonding surface of the upper mold; 702, Second middle bonding surface of the upper mold; 703, Right horizontal bonding surface of the upper mold; 704, First middle bonding surface of the upper mold; 801, First support plate forming surface of the upper mold; 802, Second support plate forming surface of the upper mold; 804, First inclined support forming surface of the upper mold; 805, Second inclined support forming surface of the upper mold; 901, Mold opening groove; 1041, First A sub-region; 1042, Second A sub-region; 1111, First B cutting line; 1112 1113, Second B cutting line; 1114, First fracture; 1341, Second fracture; 1341, End section of region C; 1241, End section of region B; 1a, First support plate; 1b, Second support plate; 1c, First diagonal brace; 1d, Second diagonal brace; 1a1, First A connection; 1a2, Second A connection; 1a3, First step groove; 1a4, First A end; 1a5, Second A end; 1b1, First B connection; 1b2, Second B connection; 1b3, Second step groove; 1b4, First B end; 1b5, Second B end; m1, Longitudinal direction of the first support plate; m2, Longitudinal direction of the second support plate; m3, Transverse direction of the reinforcing rib. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0047] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0050] See Figure 2-4As shown, according to an embodiment of the present invention, a reinforcing rib 1 is provided for connecting between a first wall surface 200 and a second wall surface 300 that are arranged at an angle, so that both the first wall surface 200 and the second wall surface 300 are supported by the reinforcing rib 1. The reinforcing rib 1 includes a first support plate 1a, a second support plate 1b, a first diagonal brace 1c, and a second diagonal brace 1d. The first support plate 1a and the second support plate 1b are arranged at an angle, and the first support plate 1a is used to connect to the first wall surface 200, and the second support plate 1b is used to connect to the second wall surface 300. Both the first diagonal brace 1c and the second diagonal brace 1d are located between the first support plate 1a and the second support plate 1b.

[0051] In this configuration, one end of the first diagonal brace 1c and the second diagonal brace 1d are connected to different positions on the longitudinal direction m1 of the first support plate, and the other ends of the first diagonal brace 1c and the second diagonal brace 1d are connected to different positions on the longitudinal direction m2 of the second support plate. Furthermore, the first diagonal brace 1c and the second diagonal brace 1d are staggered in the transverse direction m3 of the reinforcing rib. It should be noted that both the longitudinal direction m1 of the first support plate and the longitudinal direction m2 of the second support plate are perpendicular to the transverse direction m3 of the reinforcing rib.

[0052] In the above example, the present invention connects one end of the first diagonal brace 1c and the second diagonal brace 1d to different positions on the longitudinal direction m1 of the first support plate, and connects the other end of the first diagonal brace 1c and the second diagonal brace 1d to different positions on the longitudinal direction m2 of the second support plate. Furthermore, the first diagonal brace 1c and the second diagonal brace 1d are staggered in the transverse direction m3 of the reinforcing rib. This creates a cross / nested spatial structure, which can support the corner between the first wall surface 200 and the second wall surface 300 from different angles and planes. This constructs a spatial truss-type multi-point support system, fundamentally changing the structure of the reinforcing rib 1. The stress structure is more evenly distributed and reasonable, and the deformation constraint of the corner wall surface in three dimensions is achieved. This restricts the deformation of the reinforcing rib 1 in the transverse direction, thereby improving the transverse buckling resistance of the reinforcing rib 1.

[0053] In addition, compared with the single force path of the reinforcing ribs in the prior art, which is prone to stress concentration, the reinforcing rib 1 of the present invention optimizes the force path by adopting the above-mentioned structure, forming a multi-path distributed force system. The load is transferred in multiple directions through the cooperation of the first support plate 1a, the second support plate 1b, the first diagonal brace 1c and the second diagonal brace 1d, thereby greatly reducing local stress.

[0054] In addition, compared with the method of connecting the reinforcing rib directly to the wall through the diagonal brace in the prior art, the first diagonal brace 1c and the second diagonal brace 1d of the present invention are both connected to the corresponding wall through the corresponding support plate. The support plate can fit with the wall to form a large-area continuous connection, which significantly increases the connection length and area, thereby improving the reliability of the connection between the reinforcing rib 1 and the wall and reducing the risk of connection failure.

[0055] In some embodiments, the thickness direction of both the first diagonal brace 1c and the second diagonal brace 1d is perpendicular to the transverse direction m3 of the reinforcing rib, so that the first diagonal brace 1c and the second diagonal brace 1d extend along the transverse direction m3 of the reinforcing rib. In this way, while ensuring the support strength, the buckling stability of the overall structure in the lateral direction can be greatly improved.

[0056] In some implementations, such as Figure 3 As shown, the aforementioned first support plate 1a has a first A end 1a4 and a second A end 1a5 along its longitudinal direction, with the first A end 1a4 positioned close to the second support plate 1b relative to the second A end 1a5. The first A end 1a4 has a first A connecting portion 1a1 and a second A connecting portion 1a2 sequentially arranged on the transverse direction m3 of the reinforcing rib, forming a first stepped groove 1a3 between the first A connecting portion 1a1 and the second A connecting portion 1a2. The first support plate 1a is connected to one end of the first diagonal brace 1c via the first A connecting portion 1a1, and to one end of the second diagonal brace 1d via the second A connecting portion 1a2.

[0057] In the above example, the present invention, by sequentially providing a first A connecting portion 1a1 and a second A connecting portion 1a2 on the transverse direction m3 of the reinforcing rib at the first A end, and forming a first stepped groove 1a3 between the first A connecting portion 1a1 and the second A connecting portion 1a2, can achieve the connection of one end of the aforementioned first diagonal brace 1c and the second diagonal brace 1d to different positions on the longitudinal direction of the first support plate 1a, and facilitates the staggering of the first diagonal brace 1c and the second diagonal brace 1d on the transverse direction m3 of the reinforcing rib; in addition, by providing both the first A connecting portion 1a1 and the second A connecting portion 1a2 at the end of the first support plate 1a, it is beneficial to save the volume of the first support plate 1a and reduce the weight and cost of the reinforcing rib 1.

[0058] In some embodiments, one end of the aforementioned first diagonal brace 1c can be integrally formed into the first A connecting portion 1a1, thereby improving the connection stability between the first diagonal brace 1c and the first support plate 1a. Similarly, one end of the aforementioned second diagonal brace 1d can be integrally formed into the second A connecting portion 1a2, thereby improving the connection stability between the second diagonal brace 1d and the first support plate 1a.

[0059] In some implementations, such as Figure 3As shown, the aforementioned second support plate 1b has a first B end 1b4 and a second B end 1b5 along its longitudinal direction, with the first B end 1b4 positioned close to the first support plate 1a relative to the second B end 1b5. The first B end 1b4 has a first B connecting portion 1b1 and a second B connecting portion 1b2 sequentially arranged on the transverse direction m3 of the reinforcing rib, forming a second stepped groove 1b3 between the first B connecting portion 1b1 and the second B connecting portion 1b2. The second support plate 1b is connected to the other end of the first diagonal brace 1c via the first B connecting portion 1b1, and to the other end of the second diagonal brace 1d via the second B connecting portion 1b2.

[0060] In the above example, the present invention arranges a first B connecting portion 1b1 and a second B connecting portion 1b2 sequentially on the first B end 1b4 in the transverse direction m3 of the reinforcing rib, and forms a second stepped groove 1b3 between the first B connecting portion 1b1 and the second B connecting portion 1b2. This allows the other ends of the aforementioned first diagonal brace 1c and second diagonal brace 1d to be connected to different positions in the longitudinal direction of the second support plate 1b, and also facilitates the staggering of the first diagonal brace 1c and the second diagonal brace 1d in the transverse direction m3 of the reinforcing rib. In addition, by arranging both the first B connecting portion 1b1 and the second B connecting portion 1b2 at the ends of the second support plate 1b, it is beneficial to save the volume of the second support plate 1b and reduce the weight and cost of the reinforcing rib 1.

[0061] In some embodiments, the other end of the aforementioned first diagonal brace 1c can be integrally formed on the first B connecting portion 1b1, thereby improving the connection stability between the other end of the first diagonal brace 1c and the second support plate 1b. Similarly, the other end of the aforementioned second diagonal brace 1d can be integrally formed on the second B connecting portion 1b2, thereby improving the connection stability between the other end of the second diagonal brace 1d and the second support plate 1b.

[0062] In some implementations, such as Figure 3 As shown, there are two first diagonal braces 1c, which are symmetrically arranged on both sides of the second diagonal brace 1d. By increasing the number of first diagonal braces 1c, on the one hand, the formation of a symmetrical structure helps to make the stress distribution on the stiffener 1 uniform, and on the other hand, it also helps to further improve the structural strength of the stiffener 1 and improve its resistance to lateral buckling.

[0063] In some implementations, such as Figure 3 As shown, the aforementioned first diagonal brace 1c can be parallel to the second diagonal brace 1d. Furthermore, the aforementioned second A connecting portion 1a2, relative to the first A connecting portion 1a1, is close to the second A end 1a5 of the first support plate 1a, making the first support plate 1a shaped like a "U". Similarly, the aforementioned second B connecting portion 1b2, relative to the first B connecting portion 1b1, is close to the second B end 1b5 of the second support plate 1b, making the second support plate 1b also shaped like a "U". Figure 4As shown, the width W of the first diagonal brace 1c 01 Width W less than the second diagonal brace 1d 02 The length L of the first diagonal brace 1c 04 The length L is less than 1d of the second diagonal brace. 05 The length of both the first support plate 1a and the second support plate 1b is L. 03 The width of both the first support plate 1a and the second support plate 1b is W. 04 The distance between the first A connecting part 1a1 and the second A connecting part 1a2 in the longitudinal direction m1 of the first support plate is L. 02 The distance between the first B connecting part 1b1 and the second B connecting part 1b2 in the longitudinal direction m2 of the second support plate is also L. 02 The distance between the second A connecting part 1a2 and the second A end 1a5 is L. 01 The distance between the second B connecting part 1b2 and the second B end 1b5 is also L. 01 The reinforcing rib 1 of this invention is a symmetrical design.

[0064] In some embodiments, the aforementioned reinforcing rib 1 can be a carbon fiber reinforcing rib. Carbon fiber material is lightweight and naturally possesses advantages such as corrosion resistance, fatigue resistance, and a long service life. While meeting structural strength requirements, it can reduce the weight of the reinforcing rib 1, making it 40-80% lighter than metal materials of the same size. Preferably, the reinforcing rib 1 is a one-piece molded structure to further enhance its structural strength.

[0065] In some implementations, such as Figure 5 As shown, the present invention also provides a molding mechanism for molding any of the above-mentioned reinforcing ribs 1, comprising an upper mold 2 and a lower mold 3 capable of opening and closing. The upper mold 2 has an upper mold forming structure 21, and the lower mold 3 has a lower mold forming structure 31. When the upper mold 2 and the lower mold 3 are closed, a cavity is formed between the upper mold forming structure 21 and the lower mold forming structure 31. The cavity is used to accommodate molding material to mold the aforementioned reinforcing rib 1.

[0066] In some implementations, such as Figure 6-7 As shown, when there are two first diagonal braces 1c and they are symmetrically arranged on both sides of the second diagonal brace 1d, the upper mold forming structure 21 and the lower mold forming structure 31 insert into each other to form a nested structure when the upper mold 2 and the lower mold 3 are closed. The upper mold 2 and the lower mold 3 are positioned by the nested structure when they are closed. In this way, there is no need to design additional guide pillars or other positioning mechanisms on the upper mold 2 and the lower mold 3 to position them when they are closed, which simplifies the structure and saves costs.

[0067] In some embodiments, the lower mold 3 has a lower mold mating surface, and the upper mold 2 has an upper mold mating surface. The upper mold 2 achieves mold closing by mutually mating its upper mold mating surface with the lower mold mating surface of the lower mold 3. For example... Figure 6-7 As shown, the left horizontal mating surface 301 of the lower mold and the left horizontal mating surface 701 of the upper mold are mated together on the horizontal plane. The first middle mating surface 302 of the lower mold is a trapezoidal surface, convex outward, while the first middle mating surface 704 of the upper mold is an inverted trapezoidal surface, concave inward, and the two are mated together on the trapezoidal surfaces. The second middle mating surface 304 of the lower mold is a trapezoidal surface, convex outward, while the second middle mating surface 702 of the upper mold is an inverted trapezoidal surface, concave inward, and the two are mated together on the trapezoidal surfaces. The right horizontal mating surface 303 of the lower mold and the right horizontal mating surface 703 of the upper mold are mated together in the horizontal direction.

[0068] Both the first support plate forming surface 401 of the lower mold and the first support plate forming surface 801 of the upper mold are U-shaped inclined surfaces, with longer sides and a concave center. The width of the concave center is greater than the width of the protruding sides. They work together to form the first support plate 1a of the reinforcing rib 1. Similarly, the second support plate forming surface 402 of the lower mold and the second support plate forming surface 802 of the upper mold are U-shaped inclined surfaces, with longer sides and a concave center. The width of the concave center is greater than the width of the protruding sides. They work together to form the second support plate 1b of the reinforcing rib 1. The first inclined brace forming surface 403 of the lower mold and the first inclined brace forming surface 804 of the upper mold are shorter horizontal surfaces. They work together to form the first inclined brace 1c of the reinforcing rib 1. The second inclined brace forming surface 405 of the lower mold and the second inclined brace forming surface 805 of the upper mold are longer horizontal surfaces. They work together to form the second inclined brace 1d.

[0069] In the lower mold 3, the longer portions on both sides of the first support plate forming surface 401 and the second support plate forming surface 402 of the lower mold are respectively connected to the first inclined support forming surfaces 403 of the two lower molds, and the central recessed portion is connected to the second inclined support forming surface 405 of the lower mold. The second inclined support forming surface 405 of the lower mold is lower than the first inclined support forming surface 403 of the lower mold, forming a trapezoidal recess. The forming surface of the lower mold is formed by the above connection.

[0070] In the upper mold 2, the longer portions on both sides of the first support plate forming surface 801 and the second support plate forming surface 802 of the upper mold are respectively connected to the first inclined support forming surfaces 804 of the two upper molds, and the central recessed portion is connected to the second inclined support forming surface 805 of the upper mold. The second inclined support forming surface 805 of the upper mold is higher than the first inclined support forming surface 804 of the upper mold, forming a protruding trapezoidal transverse rib; the above connection constitutes the upper mold forming surface.

[0071] The trapezoidal recess of the second inclined support forming surface 405 of the lower mold and the protruding trapezoidal transverse rib of the second inclined support forming surface 805 of the upper mold mesh with each other during the mold closing process, ensuring precise vertical mold closing of the upper mold 2 and the lower mold 3. The first middle contact surface 302 and the second middle contact surface 304 of the lower mold mesh with the first middle contact surface 704 and the second middle contact surface 702 of the upper mold respectively during the mold closing process, ensuring precise horizontal mold closing of the upper mold 2 and the lower mold 3.

[0072] The lower mold 3 has a lower mold overflow groove 501, located between the lower mold mating surface and the lower mold forming surface. The upper mold 2 has an upper mold overflow groove 502, located between the upper mold mating surface and the upper mold forming surface. Both the lower mold overflow groove 501 and the upper mold overflow groove 502 have semi-circular cross-sections, forming a circular channel after the molds are closed, used to collect excess resin and air bubbles discharged during the molding process.

[0073] The upper mold 2 is provided with mold opening grooves 901, located at the four corners of the upper mold mating surface, with rounded corners inside. After the product is formed, the upper mold 2 and lower mold 3 can be pried apart using the mold opening grooves 901 to achieve demolding. The lower mold 3 has a lower mold chamfer 601 at its edge, and the upper mold 2 has an upper mold chamfer 602 at its edge, to prevent sharp parts of the molds from cutting workers.

[0074] Both the upper mold 2 and the lower mold 3 are symmetrical in both the vertical and horizontal directions.

[0075] like Figure 16-19 As shown, in some embodiments, the present invention also provides a thin-walled structure, which includes a first wall surface 200 and a second wall surface 300 arranged at an included angle. The thin-walled structure further includes the reinforcing rib 1 as described above. The reinforcing rib 1 connects the first wall surface 200 and the second wall surface 300, a first support plate 1a is used to connect to the first wall surface 200, and a second support plate 1b is used to connect to the second wall surface 300, so that both the first wall surface 200 and the second wall surface 300 are supported by the reinforcing rib 1.

[0076] In some embodiments, the aforementioned first support plate 1a and the first wall surface 200 can be fixed by one or more of the following methods: bonding, riveting, screwing, and co-curing. Similarly, the second support plate 1b and the second wall surface 300 can also be fixed by one or more of the following methods: bonding, riveting, screwing, and co-curing.

[0077] The first support plate 1a and the second support plate 1b both have large contact surfaces, which can fully contact the corresponding first wall surface 200 and second wall surface 300 to obtain a larger contact surface and a better force transmission and stress-bearing structure; the large contact surface also allows for the fixation of the reinforcing rib 1 by various fixing methods.

[0078] The thin-walled structures described above can have a variety of different structural forms, which will be illustrated with examples below.

[0079] In the first example, such as Figure 16 As shown, the thin-walled structure has a first support member 41 and a first square tube 42 disposed on the first support member 41. The tube surface of the first square tube 42 serves as the aforementioned first wall surface 200, and the support surface of the first support member 41 serves as the aforementioned second wall surface 300. There are two or more reinforcing ribs 1, which are evenly distributed around the circumference of the first square tube 42.

[0080] In the second example, such as Figure 17 As shown, the thin-walled structure has a second square tube 43, which has four corners. Each corner can be provided with the aforementioned reinforcing rib 1. The two adjacent wall surfaces at each corner are respectively the aforementioned first wall surface 200 and second wall surface 300.

[0081] In the third example, such as Figure 18 As shown, the thin-walled structure has a second support member 44 and circular tubes 45 disposed on the second support member 44. There can be two or more circular tubes 45, which are evenly distributed in a circle. Each circular tube 45 is provided with the aforementioned reinforcing rib 1 between itself and the second support member 44. The tube surface of the circular tube 45 serves as the aforementioned first wall surface 200. Each reinforcing rib 1 is connected to the tube surface of its corresponding circular tube 45 via its respective first support plate 1a. The first support plate 1a of each reinforcing rib 1 is arc-shaped, allowing it to fit snugly against the tube surface of its corresponding circular tube 45. The second support plate 1b of each reinforcing rib 1 can be the same support plate, used to fit against the second support member 44. The support surface of the second support member 44 serves as the aforementioned second wall surface 300.

[0082] In the fourth example, such as Figure 19 As shown, the thin-walled structure has a first circular tube 46, a second circular tube 47, and a third circular tube 48 arranged perpendicularly in pairs. Each pair of the first circular tube 46, the second circular tube 47, and the third circular tube 48 can be provided with the aforementioned reinforcing rib 1. Taking the reinforcing rib 1 provided between the first circular tube 46 and the second circular tube 47 as an example, the tube surface of the first circular tube 46 serves as the aforementioned first wall surface 200, and the tube surface of the second circular tube 47 serves as the aforementioned second wall surface 300. Both the first support plate 1a and the second support plate 1b of the reinforcing rib 1 are arc-shaped, so that both the first support plate 1a and the second support plate 1b can be adapted to the corresponding tube surface.

[0083] In some embodiments, the present invention also provides a molding method for molding the above-mentioned reinforcing rib 1, which includes the following steps: laying two or more carbon fiber prepreg layers sequentially on a molding mechanism so that each carbon fiber prepreg layer has the same structure as the reinforcing rib 1, and then curing each carbon fiber prepreg layer.

[0084] Each carbon fiber prepreg layer has a splicing part 100 after being laid on the molding mechanism, and the splicing parts 100 on each two adjacent carbon fiber prepreg layers are staggered.

[0085] In the above example, by staggering the splice portions 100 on each adjacent carbon fiber prepreg layer, the present invention disperses the weak points on each carbon fiber prepreg layer at different planar locations. The continuous fibers of adjacent layers "bridge" the splice seam, maintaining the load transfer path. This prevents multiple layers of weak points from overlapping, avoiding the formation of penetrating weak zones and preventing cracks from directly penetrating the entire thickness along the seam, thus ensuring the overall structural strength and anti-delamination capability.

[0086] In some embodiments, at least a portion of the carbon fiber prepreg layer is an integral structure, which can improve the structural strength of the carbon fiber prepreg layer, thereby enhancing the structural strength of the reinforcing rib 1.

[0087] To ensure that the splice portions 100 on each of the aforementioned adjacent carbon fiber prepreg layers are staggered, in some embodiments, each of the aforementioned carbon fiber prepreg layers includes a carbon fiber prepreg layer 10, a carbon fiber prepreg layer 11, a carbon fiber prepreg layer 12, and a carbon fiber prepreg layer 13. Specifically, the splice portion 100 on the carbon fiber prepreg layer 10 is located on the second diagonal brace 1d, the splice portion 100 on the carbon fiber prepreg layer 11 is located on the first diagonal brace 1c, the splice portion 100 on the carbon fiber prepreg layer 12 is located on the second support plate 1b, and the splice portion 100 on the carbon fiber prepreg layer 13 is located on the first support plate 1a.

[0088] It should be noted that each of the aforementioned carbon fiber prepreg layers is a planar structure, which, after being laid on the molding mechanism, forms a spatial shape that matches the reinforcing rib 1.

[0089] When there are two first diagonal braces 1c, symmetrically arranged on both sides of the second diagonal brace 1d, in order to position the splice 100 on the aforementioned A carbon fiber prepreg layer 10 on the second diagonal brace 1d, in a specific application example, such as Figure 8-9As shown, the carbon fiber prepreg layer 10 is an integral structure. The carbon fiber prepreg layer 10 has a first A-cut line 101 and a second A-cut line 102 arranged sequentially at intervals in its middle. An A region 104 is formed between the first A-cut line 101 and the second A-cut line 102. A first through-hole 103 is provided in the middle of the A region 104, extending from the first A-cut line 101 to the second A-cut line 102, thus dividing the A region 104 into a first A sub-region 1041 and a second A sub-region 1042. When the carbon fiber prepreg layer 10 is laid on the molding mechanism, the ends of the first A sub-region 1041 and the second A sub-region 1042 are spliced ​​together to form the aforementioned second diagonal brace 1d.

[0090] In the above example, by making the A carbon fiber prepreg layer 10 an integral structure, with only the first A cutting line 101, the second A cutting line 102 and the first through hole 103 provided thereon, the structure of the aforementioned reinforcing rib 1 can be formed by splicing the ends of the first A sub-region 1041 and the second A sub-region 1042 when it is laid on the molding mechanism, and the splicing part 100 is located on the second diagonal brace 1d.

[0091] In order to position the splice 100 on the aforementioned B carbon fiber prepreg layer 11 on the first diagonal brace 1c, in a specific application example, such as Figure 10-11 As shown, the B carbon fiber prepreg layer 11 has a second A prepreg block 111 and two second B prepreg blocks 112. The second A prepreg block 111 has a first side 11a and a second side 11b facing each other. The second A prepreg block 111 has a first B cutting line 1111 and a second B cutting line 1112 arranged sequentially at intervals between the first side 11a and the second side 11b. The first B cutting line 1111 is positioned closer to the first side 11a than the second B cutting line 1112. The second A prepreg block 111 has a first break 1113 at the middle between the first B cutting line 1111 and the first side 11a, and the second A prepreg block 111 has a second break 1114 at the middle between the second B cutting line 1112 and the second side 11b. When the B carbon fiber prepreg layer 11 is laid on the molding mechanism, a second B prepreg block 112 is spliced ​​at the first break 1113, and another second B prepreg block 112 is spliced ​​at the second break 1114. The two second B prepreg blocks 112 each form part of a first diagonal brace 1c.

[0092] In the above example, the B carbon fiber prepreg layer 11 is composed of two prepreg blocks, namely the second A prepreg block 111 and two second B prepreg blocks 112. The second A prepreg block 111 and the two second B prepreg blocks 112 are both integral structures. The second A prepreg block 111 can form most of the structure of the reinforcing rib 1 when it is laid on the molding mechanism by setting the first B cutting line 1111, the second B cutting line 1112, the first break 1113 and the second break 1114. At the same time, by splicing one second B prepreg block 112 at the first break 1113 and splicing the other second B prepreg block 112 at the second break 1114, it can cooperate with the second A prepreg block 111 to form the aforementioned reinforcing rib 1 structure, and the splicing part 100 is located on the first diagonal brace 1c.

[0093] In order to position the splice 100 on the aforementioned C carbon fiber prepreg layer 12 on the second support plate 1b, in some embodiments, such as Figure 12-13 As shown, the C carbon fiber prepreg layer 12 is an integral structure. The C carbon fiber prepreg layer 12 has a first C-cut line 121 and a second C-cut line 122 arranged sequentially at intervals in the middle. Both the first C-cut line 121 and the second C-cut line 122 extend to a designated A side 12a of the C carbon fiber prepreg layer 12. A B region 124 is formed between the first C-cut line 121 and the second C-cut line 122. The B region 124 has a third break 123 on the designated A side 12a. When the C carbon fiber prepreg layer 12 is laid on the molding mechanism, the end section 1241 of the B region covers the third break 123 to form part of the second support plate 1b.

[0094] In the above example, by making the C carbon fiber prepreg layer 12 an integral structure, with only the first C cutting line 121, the second C cutting line 122 and the third break 123 provided thereon, the structure of the aforementioned reinforcing rib 1 can be formed by covering the third break 123 with the end section 1241 of the B region when it is laid on the molding mechanism, and the splicing part 100 is located on the second support plate 1b.

[0095] In order to position the splice 100 on the aforementioned D carbon fiber prepreg layer 13 on the first support plate 1a, in some embodiments, such as Figure 14-15As shown, the D carbon fiber prepreg layer 13 is an integral structure. The D carbon fiber prepreg layer 13 has a first D-cut line 131 and a second D-cut line 132 arranged sequentially at intervals in the middle. The first D-cut line 131 and the second D-cut line 132 both extend to the designated B side 13a of the D carbon fiber prepreg layer 13. A C region 134 is formed between the first D-cut line 131 and the second D-cut line 132. The C region 134 has a fourth break 133 on the designated B side 13a. When the D carbon fiber prepreg layer 13 is laid on the molding mechanism, the end section 1341 of the C region covers the fourth break 133 to form part of the first support plate 1a.

[0096] In the above example, by making the D carbon fiber prepreg layer 13 an integral structure, with only the first D cutting line 131, the second D cutting line 132 and the fourth break 133 provided thereon, the aforementioned reinforcing rib 1 structure can be formed by covering the fourth break 133 with the end section 1341 of the C region when it is laid on the molding mechanism, and the splicing part 100 is located on the first support plate 1a.

[0097] When the C-carbon fiber prepreg layer 12 and the D-carbon fiber prepreg layer 13 adopt the above-described structures, preferably, the C-carbon fiber prepreg layer 12 and the D-carbon fiber prepreg layer 13 are laid in a way that they are paired to form a first prepreg layer group. The advantage of this arrangement is that the splice portion 100 on the C-carbon fiber prepreg layer 12 can form a symmetrical structure with the splice portion 100 on the D-carbon fiber prepreg layer 13, which can make the stress on the formed reinforcing rib 1 more uniform and help improve the structural strength of the reinforcing rib 1.

[0098] Similarly, when the A carbon fiber prepreg layer 10 and the B carbon fiber prepreg layer 11 adopt the above-described structure, preferably, the A carbon fiber prepreg layer 10 and the B carbon fiber prepreg layer 11 are laid in a way that they are paired together to form a second prepreg layer group. This is beneficial to make the layered structure more regular and to improve the structural strength of the reinforcing rib 1.

[0099] In some implementations, each of the aforementioned carbon fiber prepreg layers can be cut at different angles. When each carbon fiber prepreg layer is laid in a specific direction, sequence and number of layers, it can match the mechanical requirements of the structural components and realize the design, control and optimization of the overall performance.

[0100] When the aforementioned carbon fiber prepreg layers include carbon fiber prepreg layer 10 (A), carbon fiber prepreg layer 11 (B), carbon fiber prepreg layer 12 (C), and carbon fiber prepreg layer 13 (D), in a specific application example, the aforementioned sequential layering of two or more carbon fiber prepreg layers onto the molding mechanism specifically includes: sequentially layering 10 carbon fiber prepreg layers onto the molding mechanism, wherein the first layer is a carbon fiber prepreg layer with an angle of 0°; the second layer is a carbon fiber prepreg layer with an angle of +45°; the third layer is a carbon fiber prepreg layer with an angle of +45°; the fourth layer is a carbon fiber prepreg layer with an angle of +45°; the fifth layer is a carbon fiber prepreg layer with an angle of +45°; the sixth layer is a carbon fiber prepreg layer with an angle of +45°; the seventh layer is a carbon fiber prepreg layer with an angle of +45°; the eighth layer is a carbon fiber prepreg layer with an angle of +45°; the ninth layer is a carbon fiber prepreg layer with an angle of +45°; the tenth layer is a carbon fiber prepreg layer with an angle of +45°; the eleven ... Layer 3 is carbon fiber prepreg layer A, with an angle of -45°; layer 4 is carbon fiber prepreg layer B, with an angle of 90°; layer 5 is carbon fiber prepreg layer C, with an angle of 0°; layer 6 is carbon fiber prepreg layer D, with an angle of 0°; layer 7 is carbon fiber prepreg layer B, with an angle of 90°; layer 8 is carbon fiber prepreg layer A, with an angle of -45°; layer 9 is carbon fiber prepreg layer D, with an angle of +45°; and layer 10 is carbon fiber prepreg layer C, with an angle of 0°. The specific layup scheme can be represented as the layup sequence: [CD / AB / ] S ×[0 / ±45 / 90 / 0] S .

[0101] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0102] 1. The carbon fiber prepreg layer can be designed in advance. The prepreg cutting shape ensures the continuity of the fibers to the greatest extent, and each shape can be cut into prepregs at different angles, avoiding the adverse effects of splicing fragmented prepregs on strength, and enabling the design and control of overall performance; 2. The shape design of the carbon fiber prepreg layer takes into account the convenience of operation, making the layup operation relatively convenient and simple, and the production efficiency high; 3. Reinforcing rib 1 can strengthen the right-angle bends of thin-walled structures, and the thin-walled structures are not limited to planes, curved surfaces, or a combination of planes and curved surfaces; 4. Reinforcing rib 1 includes 3 diagonal... 5. The reinforcing ribs 1 are supported and extend laterally, which can greatly improve the lateral buckling stability of the overall structure while ensuring vertical support strength; 6. The fixing methods of the reinforcing ribs 1 are diverse and suitable for various scenarios. They can be fixed by one or more of the following methods: bonding, riveting, screwing, and co-curing processes; 7. The mold design is simple and easy to operate, which facilitates the laying operation and mold closing and curing; 8. The reinforcing ribs 1 are made of carbon fiber composite material, which is 40% to 80% lighter than metal materials of the same size. It is lightweight and has the advantages of structural and performance design; 9. It naturally has the advantages of corrosion resistance and fatigue resistance, and has a long service life.

[0103] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0104] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A reinforcing rib for connecting a first wall surface (200) and a second wall surface (300) arranged at an included angle, such that the first wall surface (200) and the second wall surface (300) are both supported by the reinforcing rib (1); characterized in that: The reinforcing rib (1) includes a first support plate (1a), a second support plate (1b), a first diagonal brace (1c), and a second diagonal brace (1d). The first support plate (1a) and the second support plate (1b) are arranged at an angle, and the first support plate (1a) is used to connect with the first wall surface (200), and the second support plate (1b) is used to connect with the second wall surface (300). The first diagonal brace (1c) and the second diagonal brace (1d) are both located between the first support plate (1a) and the second support plate (1b); one end of the first diagonal brace (1c) and the second diagonal brace (1d) are respectively connected to different positions in the longitudinal direction (m1) of the first support plate, and the other end of the first diagonal brace (1c) and the second diagonal brace (1d) are respectively connected to different positions in the longitudinal direction (m2) of the second support plate, and the first diagonal brace (1c) and the second diagonal brace (1d) are also staggered in the transverse direction (m3) of the reinforcing rib.

2. The reinforcing rib according to claim 1, characterized in that: The first support plate (1a) has a first A end (1a4) and a second A end (1a5) opposite to each other along its longitudinal direction. The first A end (1a4) is disposed close to the second support plate (1b) relative to the second A end (1a5). The first A end (1a4) is provided with a first A connecting part (1a1) and a second A connecting part (1a2) in sequence on the transverse direction (m3) of the reinforcing rib. A first stepped groove (1a3) is formed between the first A connecting part (1a1) and the second A connecting part (1a2). The first support plate (1a) is connected to one end of the first diagonal brace (1c) through the first A connecting part (1a1) and to one end of the second diagonal brace (1d) through the second A connecting part (1a2).

3. The reinforcing rib according to claim 2, characterized in that: The second support plate (1b) has a first B end (1b4) and a second B end (1b5) opposite to each other along its longitudinal direction. The first B end (1b4) is disposed close to the first support plate (1a) relative to the second B end (1b5). The first B end (1b4) is provided with a first B connecting part (1b1) and a second B connecting part (1b2) in sequence on the transverse direction (m3) of the reinforcing rib. A second step groove (1b3) is formed between the first B connecting part (1b1) and the second B connecting part (1b2). The second support plate (1b) is connected to the other end of the first diagonal brace (1c) through the first B connecting part (1b1) and to the other end of the second diagonal brace (1d) through the second B connecting part (1b2).

4. A forming mechanism for forming the reinforcing rib according to any one of claims 1-3, characterized in that: It includes an upper mold (2) and a lower mold (3) that can be opened and closed. The upper mold (2) has an upper mold forming structure (21), and the lower mold (3) has a lower mold forming structure (31). When the upper mold (2) and the lower mold (3) are closed, a cavity is formed between the upper mold forming structure (21) and the lower mold forming structure (31). The cavity is used to accommodate the molding material to form the reinforcing rib (1).

5. The molding mechanism according to claim 4, characterized in that: When there are two first diagonal braces (1c) and they are symmetrically arranged on both sides of the second diagonal brace (1d), the upper mold forming structure (21) and the lower mold forming structure (31) insert into each other to form a nested structure when the upper mold (2) and the lower mold (3) are closed. The upper mold (2) and the lower mold (3) are positioned by the nested structure when they are closed.

6. A method for forming the reinforcing rib according to any one of claims 1-3, characterized in that: Includes the following steps: Two or more carbon fiber prepreg layers are sequentially laid on the molding mechanism so that each carbon fiber prepreg layer has the same structure as the reinforcing rib (1), and then each carbon fiber prepreg layer is cured. Each of the carbon fiber prepreg layers has a splicing part (100) after being laid on the molding mechanism, and the splicing parts (100) on each two adjacent carbon fiber prepreg layers are staggered.

7. The molding method according to claim 6, characterized in that: At least part of the carbon fiber prepreg layer is a one-piece structure.

8. The molding method according to claim 6 or 7, characterized in that: Each of the carbon fiber prepreg layers includes carbon fiber prepreg layer A (10), carbon fiber prepreg layer B (11), carbon fiber prepreg layer C (12), and carbon fiber prepreg layer D (13); Among them, the splice (100) on the A carbon fiber prepreg layer (10) is located on the second diagonal brace (1d), the splice (100) on the B carbon fiber prepreg layer (11) is located on the first diagonal brace (1c), the splice (100) on the C carbon fiber prepreg layer (12) is located on the second support plate (1b), and the splice (100) on the D carbon fiber prepreg layer (13) is located on the first support plate (1a).

9. The molding method according to claim 8, characterized in that: When there are two of the first diagonal braces (1c), and they are symmetrically arranged on both sides of the second diagonal brace (1d), The A carbon fiber prepreg layer (10) is an integral structure. The A carbon fiber prepreg layer (10) has a first A cutting line (101) and a second A cutting line (102) arranged in sequence at intervals in the middle. The first A cutting line (101) and the second A cutting line (102) form an A region (104). The A region (104) has a first through hole (103) in the middle. The first through hole (103) extends from the first A cutting line (101) to the second A cutting line (102) to divide the A region (104) into a first A sub-region (1041) and a second A sub-region (1042). When the A carbon fiber prepreg layer (10) is laid on the molding mechanism, the ends of the first A sub-region (1041) and the second A sub-region (1042) are spliced ​​to form the second diagonal brace (1d).

10. The molding method according to claim 8, characterized in that: When there are two of the first diagonal braces (1c), and they are symmetrically arranged on both sides of the second diagonal brace (1d), The B carbon fiber prepreg layer (11) has a second A prepreg block (111) and two second B prepreg blocks (112); the second A prepreg block (111) has a first side (11a) and a second side (11b) opposite to each other, and the second A prepreg block (111) has a first B cutting line (1111) and a second B cutting line (1112) arranged sequentially between the first side (11a) and the second side (11b), the first B cutting line (1111) being closer to the first side (11a) than the second B cutting line (1112), and the second A prepreg block (111) being closer to the first B cutting line (1112) than the second B cutting line (1112). A first break (1113) is provided in the middle between the line (1111) and the first side (11a), and a second break (1114) is provided in the middle between the second B cutting line (1112) and the second side (11b); when the B carbon fiber prepreg layer (11) is laid on the molding mechanism, one second B prepreg block (112) is spliced ​​at the first break (1113), and another second B prepreg block (112) is spliced ​​at the second break (1114), and the two second B prepreg blocks (112) each form part of a first diagonal brace (1c).

11. The molding method according to claim 8, characterized in that: When there are two of the first diagonal braces (1c), and they are symmetrically arranged on both sides of the second diagonal brace (1d), The C carbon fiber prepreg layer (12) is an integral structure. The C carbon fiber prepreg layer (12) has a first C-cut line (121) and a second C-cut line (122) arranged in sequence at intervals in the middle. The first C-cut line (121) and the second C-cut line (122) both extend to the designated A side (12a) of the C carbon fiber prepreg layer (12). A B region (124) is formed between the first C-cut line (121) and the second C-cut line (122). The B region (124) has a third break (123) on the designated A side (12a). When the C carbon fiber prepreg layer (12) is laid on the molding mechanism, the end section (1241) of the B region covers the third break (123) to form a part of the second support plate (1b).

12. The molding method according to claim 8, characterized in that: When there are two of the first diagonal braces (1c), and they are symmetrically arranged on both sides of the second diagonal brace (1d), The D carbon fiber prepreg layer (13) is an integral structure. The D carbon fiber prepreg layer (13) has a first D cutting line (131) and a second D cutting line (132) arranged in sequence at intervals in the middle. The first D cutting line (131) and the second D cutting line (132) both extend to the designated B side (13a) of the D carbon fiber prepreg layer (13). A C region (134) is formed between the first D cutting line (131) and the second D cutting line (132). The C region (134) has a fourth break (133) on the designated B side (13a). When the D carbon fiber prepreg layer (13) is laid on the molding mechanism, the end section (1341) of the C region covers the fourth break (133) to form a part of the first support plate (1a).

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