Light-weight metal launching box cover based on 3D printing

Abstract

The invention relates to a light-weight metal launching box cover based on 3D printing. The light-weight metal launching box cover comprises a plurality of box cover parts connected with one another. The box cover part comprises a hollow outer shell and a reinforcing structure arranged in the outer shell; the reinforcing structure is laid in the hollow part of the outer shell along the surface type of the outer shell, and the reinforcing structure is fixedly connected with the upper side wall, the lower side wall and the edge side wall of the outer shell. A fixed connecting structure is arranged on the side wall of part of the edge in the outer shell, and the fixed connecting structure and the reinforcing structure are fixedly connected with each other; the reinforcing structure is of a porous variable-density structure, and the hole density of part of the reinforcing structure is larger than that of the other part of the reinforcing structure on the periphery of the fixed connecting structure, so that the structural strength of the part of the reinforcing structure on the periphery of the fixed connecting structure is improved.

Description

Technical Field

[0001] The invention relates to the field of machinery, and in particular to a lightweight metal launch box cover based on 3D printing. Background Art

[0002] As a key component of the missile weapon system, the missile storage and launch box not only has the function of launching and aiming, but also plays a role in protecting the missile during transportation and storage. When launching, it must be opened quickly in a certain way to allow the missile to be smoothly ejected from the box. Modern information warfare has high-tech weapons, diversified combat methods, and a fast combat rhythm. These characteristics determine that the missile storage and launch box must respond quickly to improve the survivability of the missile.

[0003] At present, the box cover can be divided into two types according to the material properties: metal box cover and composite material box cover. Compared with the launch box cover made of non-metal composite materials, the metal box cover has better pressure bearing performance and better adaptability; however, the metal box cover also needs to face many problems, such as large weight, poor rapid response ability, and relatively difficult maintenance and upkeep.

[0004] The current method for manufacturing metal launch box covers is mostly to use direct welding of sheet metal, which limits the structural weight reduction capability of the components. Summary of the invention

[0005] The purpose of the present invention is to provide a lightweight metal launch box cover based on 3D printing.

[0006] To achieve the above-mentioned invention object, the present invention provides a lightweight metal launch box cover based on 3D printing, comprising: a plurality of interconnected box cover parts; The box cover part comprises: a hollow outer shell and a reinforcement structure arranged in the outer shell; The reinforcement structure is laid in the hollow part of the outer shell along the surface of the outer shell, and the reinforcement structure is fixedly connected to the upper side wall, the lower side wall and the edge side wall of the outer shell respectively; Part of the edge side wall inside the outer shell is provided with a fixed connection structure, and the fixed connection structure and the reinforcement structure are fixedly connected to each other; The reinforcement structure is a porous variable density structure, wherein around the fixed connection structure, the pore density of part of the reinforcement structure is greater than the pore density of the rest of the reinforcement structure, so as to increase the structural strength of the part of the reinforcement structure around the fixed connection structure.

[0007] According to one aspect of the present invention, the reinforcement structure is a honeycomb structure or a lattice structure.

[0008] According to one aspect of the present invention, if the reinforcement structure is a honeycomb structure, it comprises: a first regular ring and a second regular ring; The shape of the second regular ring is consistent with that of the first regular ring, and the size of the second regular ring is smaller than that of the first regular ring; In the outer shell, the first regular rings are arranged in a rectangular array, wherein adjacent first regular rings are fixedly connected to each other; Around the fixed connection structure, the second regular rings are arranged in a rectangular array, wherein adjacent second regular rings are fixedly connected to each other; The second regular ring is fixedly connected to the first regular ring, wherein at least a portion of the second regular ring is surrounded by the first regular ring.

[0009] According to one aspect of the present invention, in the reinforcement structure, the first regular rings in two adjacent rows are arranged in alignment or staggered arrangement, and the second regular rings in two adjacent rows are arranged staggered arrangement.

[0010] According to one aspect of the present invention, in the reinforcement structure, the first regular rings connected to each other are fixedly connected in a side-sharing manner, and the second regular rings connected to each other are fixedly connected in a side-sharing manner.

[0011] According to one aspect of the present invention, the axial direction of the hole in the reinforcing structure is arranged along the thickness direction of the box cover part; Around the reinforcement structure, the side walls of the first regular ring and the second regular ring are thickened.

[0012] According to one aspect of the present invention, if the reinforcement structure is a lattice structure, it comprises: a first lattice structure portion and a second lattice structure portion; The first lattice structure part is composed of a plurality of first lattice unit cells in a rectangular array; The second lattice structure part is composed of a plurality of second lattice unit cells in a rectangular array; The second lattice unit cell and the first lattice unit cell are arranged to be staggered with each other, and the second lattice unit cell and the first lattice unit cell are fixed to each other.

[0013] According to one aspect of the present invention, the configuration of the first lattice unit cell is consistent with the configuration of the second lattice unit cell.

[0014] According to one aspect of the present invention, the radial size of the second rod body of the second lattice unit cell is smaller than or equal to the radial size of the first rod body of the first lattice unit cell.

[0015] According to one aspect of the present invention, the fixed connection structure is a boss structure, and a connection hole is provided on the fixed connection structure; The axial direction of the connecting hole is arranged to be consistent with the thickness direction of the outer shell; Corner reinforcement protrusions are arranged at some corner positions of the outer shell.

[0016] According to one scheme of the present invention, the lightweight metal launch box cover of the present invention has a simple structure and is easy to manufacture, which reduces the weight of the components and improves the strength of the launch box cover, ensuring that the launch box cover structure has both a high level of lightweight and pressure resistance, and comprehensively enhances the rapid response capability.

[0017] According to one solution of the present invention, the lightweight metal launch box cover based on 3D printing adopts a skin-hollow reinforcement structure, and the interior is a hollow porous variable density structure (i.e., a reinforcement structure), which replaces the traditional solid components, so that the weight can be reduced to the maximum extent without changing the appearance of the components. In addition, in view of the working conditions and bearing performance requirements of the launch box cover, the present invention further arranges a porous variable density structure at the corresponding position to strengthen the anti-deformation ability of the pressure-bearing area and the fixed connection part.

[0018] According to one scheme of the present invention, the reinforcement structure of the present invention adopts a porous variable density structure (porous medium), which has the advantages of low relative density, high specific strength, high specific surface area, light weight, sound insulation, heat insulation, good permeability, etc., making the use reliability of the present invention better.

[0019] According to one scheme of the present invention, the present invention can process a lightweight metal launch box cover with variable thickness and hollow structure, which is beneficial to reducing weight and easy to strengthen stress weak areas; in addition, by setting a reasonable segmentation method, the welding structure is optimized, the component structure is simplified, the number of welding processes and the amount of welding deformation are reduced, the product qualification rate is improved, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram schematically showing a lightweight metal launch box cover according to an embodiment of the present invention; Figure 2 is a top view schematically showing a lightweight metal launch box cover according to one embodiment of the present invention; Figure 3 is a structural diagram schematically showing a box cover portion according to an embodiment of the present invention; Figure 4 is a diagram schematically showing an arrangement of a reinforcement structure in a box cover part according to an embodiment of the present invention; Figure 5is a top view schematically showing an arrangement of a reinforcement structure in a box cover part according to an embodiment of the present invention; Figure 6 is a diagram schematically showing an arrangement of a reinforcement structure in a box cover part according to another embodiment of the present invention; Figure 7 is a top view schematically showing a reinforcement structure according to another embodiment of the present invention; Figure 8 is a side view schematically showing a reinforcement structure according to another embodiment of the present invention; Fig. 9 The figure schematically shows the arrangement of powder cleaning holes on the side of the box cover according to one embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0024] Combination Figure 1 , Figure 2 and Figure 3As shown, according to one embodiment of the present invention, a lightweight metal launch box cover based on 3D printing of the present invention comprises: a plurality of interconnected box cover parts 1; wherein the box cover part 1 is made of aluminum alloy material and is made based on 3D printing. In this embodiment, the outer envelope size of the entire lightweight metal launch box cover is 1000mm*1000mm*200mm, and in order to reduce processing costs and improve production efficiency, it is divided into 4 box cover parts 1, and an integrated structure is formed by welding and splicing; wherein the welding method can be laser welding. In this embodiment, the box cover part 1 can also be set to other numbers, and can be adaptively set according to the size of the entire lightweight metal launch box cover to effectively improve its production efficiency and reduce its production cost.

[0025] Combination Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the box cover part 1 includes: a hollow outer shell 11 and a reinforcing structure 12 arranged in the outer shell 11; wherein the reinforcing structure 12 is laid in the hollow part of the outer shell 11 along the surface of the outer shell 11, and the reinforcing structure 12 is fixedly connected to the upper side wall, lower side wall and edge side wall of the outer shell 11 respectively.

[0026] The provided reinforcement structure can fully enhance the structural strength of the entire box cover portion 1, so that the assembled lightweight metal launch box cover has the advantages of high strength and high stability.

[0027] In this embodiment, a fixed connection structure 11 a is provided on a portion of the edge sidewall inside the outer shell 11 , and the fixed connection structure 11 a and the reinforcement structure 12 are fixedly connected to each other.

[0028] Through the above-mentioned arrangement, by arranging the fixed connection structure 11a at the edge side wall position of the outer shell 11, it is possible to more conveniently ensure the stable and reliable installation of the lightweight metal launch box cover of the present invention and other structures, so as to effectively improve the installation stability of the present invention; in addition, by fixing the reinforcement structure 12 and the fixed connection structure 11a to each other, it is possible to effectively ensure the reliability of the connection of the fixed connection structure 11a on the box cover part 1, thereby ensuring the connection of the present invention with other structures.

[0029] In this embodiment, the reinforcing structure 12 is a porous variable density structure, wherein the hole density of part of the reinforcing structure 12 around the fixed connection structure 11a is greater than the hole density of the rest of the reinforcing structure 12, so as to increase the structural strength of the part of the reinforcing structure 12 around the fixed connection structure 11a. In this embodiment, the reinforcing structure 12 adopts the method of controlling the size of the holes to control the change of its density. The density of the holes in the part of the reinforcing structure 12 with a large hole density is large but the pore diameter is small. Thus, the structural strength of this part is better through the method of large density and small pore diameter, while the rest of the parts are arranged based on the method of large pore diameter and small pore density so that the structural strength of the rest of the positions is relatively weakened. In this embodiment, the hole density of the reinforcing structure 12 is gradually reduced in the direction away from the fixed connection structure 11a, so as to effectively increase the structural strength around the fixed connection structure 11a. As the distance away increases, the structural strength is gradually changed by controlling the hole density to gradually decrease or the step-by-step reduction, so as to effectively ensure the structural strength of the weak connection position and effectively reduce the structural mass.

[0030] Through the above arrangement, the reinforcing structure 12 is set as a porous variable density structure, which can effectively ensure the overall reinforcement effect, and can also effectively reduce the weight of the entire box cover part 1 and reduce its production cost.

[0031] In this embodiment, the angle between the reinforcing structure 12 and the 3D printing direction of the box cover part 1 is less than or equal to 45°.

[0032] Through the above-mentioned arrangement, the surface quality of the reinforcing structure 12 during the 3D printing process can be effectively guaranteed, and the collapse of the structure during the printing process can be effectively avoided, so as to ensure the stability of the entire reinforcing structure 12.

[0033] Combination Figure 3 , Figure 4 and Figure 5 As shown, according to an embodiment of the present invention, the reinforcement structure 12 is a honeycomb structure or a lattice structure; wherein, if the reinforcement structure 12 is a honeycomb structure, it includes: a first regular ring 121 and a second regular ring 122; in this embodiment, the shape of the second regular ring 122 is consistent with the shape of the first regular ring 121, and the size of the second regular ring 122 is smaller than the size of the first regular ring 121; for example, the first regular ring 121 and the second regular ring 122 can both be set to hexagonal rings, and the second regular ring 122 can be obtained by proportionally reducing the first regular ring 121.

[0034] In this embodiment, inside the outer shell 11, the first regular rings 121 are arranged in a rectangular array, wherein adjacent first regular rings 121 are fixedly connected to each other; wherein the opposite sides of the opening of the first regular ring 121 are respectively fixedly connected to the upper side wall and the lower side wall in the thickness direction of the outer shell 11, and around the fixed connection structure 11a, the second regular rings 122 are arranged in a rectangular array, wherein adjacent second regular rings 122 are fixedly connected to each other. In this embodiment, the second regular ring 122 is fixedly connected to the first regular ring 121, wherein at least a portion of the second regular ring 122 is surrounded by the first regular ring 121; see Figure 4 and Figure 5 As shown, two rows of second regular rings 122 can be arranged in one row of first regular rings 121, and further, a plurality of second regular rings 122 can be included in the first regular ring 121. Of course, since the size of the second regular rings 122 is relatively small, some of the second regular rings 122 can be cross-connected with the first regular rings 121 to further ensure the stability and reliability of the connection structure.

[0035] Through the above-mentioned arrangement, in the reinforcement structure 12, by arranging the first regular ring 121 and the second regular ring 122 and surrounding and cross-connecting the second regular ring 122 and the first regular ring 121, part of the position of the entire reinforcement structure 12 can be effectively reinforced, thereby effectively ensuring the structural strength of the connection position between the reinforcement structure 12 and the fixed connection structure 11a, thereby ensuring the connection stability between the box cover part 1 of the present invention and other structures based on the fixed connection structure 11a.

[0036] Combination Figure 3 , Figure 4 and Figure 5 As shown, according to an embodiment of the present invention, in the reinforcement structure 12, the first regular rings 121 of two adjacent rows are arranged in alignment with each other or in a staggered arrangement, wherein when the first regular rings 121 of two adjacent rows are arranged in alignment with each other, the structure is more sparse, which is beneficial to reducing the mass of the entire reinforcement structure 12. When the first regular rings 121 of two adjacent rows are arranged in a staggered arrangement, the structure is relatively dense, especially the way in which the adjacent first regular rings 121 are fixed to each other can further make the structure of the present invention more firm and reliable. In this embodiment, the second regular rings 122 of two adjacent rows are arranged in a staggered arrangement. Among them, by the second regular rings 122 that are staggered with each other, on the one hand, it can effectively ensure the structural strength of the connected second regular rings 122, and can also effectively ensure the structural strength of the connection between the second regular ring 122 and the first regular ring 121.

[0037] Combination Figure 3 , Figure 4 and Figure 5As shown, according to one embodiment of the present invention, in the reinforcement structure 12, the first regular rings 121 connected to each other are fixedly connected in a side-sharing manner, and the second regular rings 122 connected to each other are fixedly connected in a side-sharing manner.

[0038] Through the above arrangement, by adopting the side sharing method, the flexibility and convenience of the whole structure processing can be effectively guaranteed. In addition, the structural strength of each regular ring can be flexibly adjusted by sharing the side, so that the structural strength of the reinforcement structure 12 is more reliable.

[0039] like Figure 3 As shown, according to one embodiment of the present invention, the axial direction of the hole in the reinforcing structure 12 is arranged along the thickness direction of the box cover part 1; through the above arrangement, the side walls of each regular ring in the reinforcing structure 12 can reliably support the upper side wall and the lower side wall of the outer shell 11, which is more beneficial to ensuring the structural accuracy of the shape of the box cover part 1.

[0040] According to one embodiment of the present invention, the side walls of the first regular ring 121 and the second regular ring 122 are thickened around the reinforcing structure 12. Of course, in another embodiment, the side walls of the remaining first regular ring 121 can be thickened to optimize the structural strength of the entire box cover part 1 in order to meet the structural strength requirements of the entire box cover part 1.

[0041] Through the above arrangement, the partial reinforcement of the reinforcement structure 12 effectively ensures that the structural strength of some positions is further enhanced, so that the structural strength of the present invention is more reliable.

[0042] Combination Figure 4 and Figure 5 As shown, according to an embodiment of the present invention, the first regular ring 121 and the second regular ring 122 can be hexagonal rings, wherein the symmetry axes passing through the two tips of the regular rings on the first regular ring 121 and the second regular ring 122 are arranged perpendicular to the side edge where the fixed connection structure 11a is arranged on the outer shell 11. In this embodiment, the angle of the tip of the hexagonal ring is greater than or equal to 90°.

[0043] Through the above-mentioned arrangement, since the overall area of ​​the box cover part 1 is relatively large, its 3D printing process is implemented in a vertical printing manner. Furthermore, by setting the first regular ring 121 and the second regular ring 122 as mentioned above, the structural reliability of the printing process of the first regular ring 121 and the second regular ring 122 can be effectively guaranteed. In particular, the method of setting the angle between the two tips of the hexagonal ring to be greater than or equal to 90° can make the angle between the side of the tip and the horizontal direction less than or equal to 45°, thereby effectively ensuring the surface quality of the side of the processed hexagonal ring and avoiding structural collapse, further effectively ensuring the finished product yield of the entire box cover part 1.

[0044] Combination Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, according to one embodiment of the present invention, if the reinforcement structure 12 is a lattice structure, it includes: a first lattice structure portion 12a and a second lattice structure portion 12b; wherein, the first lattice structure portion 12a and the second lattice structure portion 12b can select a tetrahedral lattice structure to facilitate their formation. Of course, the first lattice structure portion 12a and the second lattice structure portion 12b can also be set to other lattice structures, which will not be repeated here. In this embodiment, the first lattice structure portion 12a is composed of a plurality of first lattice unit cells 12a1 in a rectangular array; wherein, the plurality of first lattice unit cells 12a1 are fixedly connected based on the way that the ends of the rod bodies are fixed to each other; the second lattice structure portion 12b is composed of a plurality of second lattice unit cells 12b1 in a rectangular array; wherein, the plurality of second lattice unit cells 12b1 are fixedly connected based on the way that the ends of the rod bodies are fixed to each other. Furthermore, the second lattice unit cell 12b1 and the first lattice unit cell 12a1 are arranged in a staggered manner, and the second lattice unit cell 12b1 and the first lattice unit cell 12a1 are fixed to each other; wherein the second lattice unit cell 12b1 is fixed to each other by cross-fixing its second rod body 12b11 with the first rod body 12a11 of the first lattice unit cell 12a1 to achieve mutual fixation reinforcement.

[0045] Combination Figure 3 , Figure 6 , Figure 7 and Figure 8As shown, according to one embodiment of the present invention, the configuration of the first lattice unit cell 12a1 is consistent with the configuration of the second lattice unit cell 12b1, that is, when the configuration of the first lattice unit cell 12a1 is a tetrahedral lattice structure, the configuration of the second lattice unit cell 12b1 is also correspondingly set to a tetrahedral lattice structure. Therefore, based on the first lattice unit cell 12a1 and the second lattice unit cell 12b1 with the same configuration, reliable reinforcement of some positions in the entire reinforced structure 12 can be achieved, and the structural distribution of the reinforced position can be made more uniform and flexible, so that the reliability of the overall structure of the reinforced structure 12 is higher.

[0046] Combination Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, according to an embodiment of the present invention, the radial dimension of the second rod 12b11 of the second lattice unit cell 12b1 is less than or equal to the radial dimension of the first rod 12a11 of the first lattice unit cell 12a1; wherein the second rod 12b11 and the first rod 12a11 can both be set as round rods, thereby facilitating the processing and manufacturing of the entire reinforcement structure 12. Of course, the first rod 12a11 and the second rod 12b11 can also be set as prism structures with regular cross-sections, wherein the cross-sectional shapes of the first rod 12a11 and the second rod 12b11 can be the same or different.

[0047] In another embodiment, the radial dimensions of the first rod body 12a11 and the second rod body 12b11 can be set to be constant or variable, for example, the radial dimensions of the rod bodies are gradually reduced along the direction extending outward from the middle intersection of the plurality of rod bodies. Through the above setting, the strength of the reinforcing structure 12 can be flexibly adjusted, so that the matching of the structural weight and structural strength is more flexible.

[0048] In this embodiment, the lattice size of the first lattice unit cell 12a1 and the second lattice unit cell 12b1 can be set to 10*10*10, 5*5*5, 3*3*3, etc.; the radial size of the first rod body 12a11 and the second rod body 12b11 can be set to Ф1mm, Ф0.8mm, Ф0.6mm, etc.

[0049] like Figure 3 As shown, according to one embodiment of the present invention, the fixed connection structure 11a is a boss structure, and a connection hole is provided on the fixed connection structure 11a; wherein the axial direction of the connection hole is consistent with the thickness direction of the outer shell 11; furthermore, threaded fixation with other structures can be achieved by using a threaded connection member to pass through the connection hole.

[0050] In this embodiment, corner reinforcement protrusions 11b are provided at some corner positions of the outer shell 11; wherein, the corner reinforcement protrusions 11b can fix the edge side walls of the corner positions to each other, thereby being able to reinforce the corner positions and conveniently eliminate the stress at the corner positions, so that the corner positions of the present invention have the advantage of high strength.

[0051] like Fig. 9 As shown, according to one embodiment of the present invention, a powder cleaning hole penetrating the side wall of the outer shell 11 is also provided on the side edge thereof, and the powder generated during the internal processing can be conveniently discharged through the provided powder cleaning hole to ensure the internal cleanliness.

[0052] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail therein, it should be understood that they can be implemented by adopting general devices and general methods available in the art.

[0053] The above is only one solution of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lightweight metal launch box cover based on 3D printing, characterized in that: include: A plurality of interconnected cover parts (1); The box cover part (1) comprises: a hollow outer shell (11) and a reinforcement structure (12) arranged inside the outer shell (11); The reinforcing structure (12) is laid in the hollow portion of the outer shell (11) along the surface of the outer shell (11), and the reinforcing structure (12) is respectively fixedly connected to the upper side wall, the lower side wall and the edge side wall of the outer shell (11); A fixed connection structure (11a) is provided on a portion of the edge side wall inside the outer shell (11), and the fixed connection structure (11a) and the reinforcement structure (12) are fixedly connected to each other; The reinforcing structure (12) is a porous variable density structure, wherein around the fixed connection structure (11a), the pore density of a portion of the reinforcing structure (12) is greater than the pore density of the remaining portion of the reinforcing structure (12), so as to increase the structural strength of the portion of the reinforcing structure (12) around the fixed connection structure (11a).

2. The lightweight metal launch box cover according to claim 1 is characterized in that: The reinforcement structure (12) is a honeycomb structure or a lattice structure.

3. The lightweight metal launch box cover according to claim 2 is characterized in that: If the reinforcement structure (12) is a honeycomb structure, it comprises: a first regular ring (121) and a second regular ring (122); The shape of the second regular ring (122) is arranged to be consistent with the shape of the first regular ring (121), and the size of the second regular ring (122) is smaller than the size of the first regular ring (121); In the outer shell (11), the first regular rings (121) are arranged in a rectangular array, wherein adjacent first regular rings (121) are fixedly connected to each other; Around the fixed connection structure (11a), the second regular rings (122) are arranged in a rectangular array, wherein adjacent second regular rings (122) are fixedly connected to each other; The second regular ring (122) and the first regular ring (121) are fixedly connected to each other, wherein at least a portion of the second regular ring (122) is surrounded by the first regular ring (121).

4. The lightweight metal launch box cover according to claim 3 is characterized in that: In the reinforcement structure (12), the first regular rings (121) in two adjacent rows are arranged in alignment with each other or in a staggered arrangement, and the second regular rings (122) in two adjacent rows are arranged in a staggered arrangement.

5. The lightweight metal launch box cover according to claim 4, characterized in that: In the reinforcement structure (12), the first regular rings (121) connected to each other are fixedly connected in a side-sharing manner, and the second regular rings (122) connected to each other are fixedly connected in a side-sharing manner.

6. The lightweight metal launch box cover according to claim 5, characterized in that: The axial direction of the hole in the reinforcing structure (12) is arranged along the thickness direction of the box cover part (1); Around the reinforcement structure (12), the side walls of the first regular ring (121) and the second regular ring (122) are thickened.

7. The lightweight metal launch box cover according to claim 2, characterized in that: If the reinforcement structure (12) is a lattice structure, it comprises: a first lattice structure portion (12a) and a second lattice structure portion (12b); The first lattice structure part (12a) is composed of a plurality of first lattice unit cells (12a1) in a rectangular array; The second lattice structure part (12b) is composed of a plurality of second lattice unit cells (12b1) in a rectangular array; The second lattice unit cell (12b1) and the first lattice unit cell (12a1) are arranged in a mutually staggered manner, and the second lattice unit cell (12b1) and the first lattice unit cell (12a1) are fixed to each other.

8. The lightweight metal launch box cover according to claim 7, characterized in that: The configuration of the first lattice unit cell (12a1) is consistent with the configuration of the second lattice unit cell (12b1).

9. The lightweight metal launch box cover according to claim 8, characterized in that: The radial dimension of the second rod body (12b11) of the second lattice unit cell (12b1) is smaller than or equal to the radial dimension of the first rod body (12a11) of the first lattice unit cell (12a1).

10. The lightweight metal launch box cover according to any one of claims 1 to 9, characterized in that: The fixed connection structure (11a) is a boss structure, and a connection hole is provided on the fixed connection structure (11a); The axial direction of the connecting hole is arranged to be consistent with the thickness direction of the outer shell (11); Corner reinforcement protrusions (11b) are provided at some corner positions of the outer shell (11).

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