Method for three-dimensional manufacturing of honeycomb components using hollow unit cells

Abstract

The application relates to the field of 3D manufacturing of honeycomb components, and particularly relates to a method for manufacturing honeycomb components in three dimensions by using hollow unit bodies, which comprises the following steps: a honeycomb component framework is manufactured by repeatedly arranging and assembling hollow unit bodies and spot welding; a honeycomb component shell is manufactured by using a surfacing additive method; the work of manufacturing the framework and the work of surfacing the shell are alternately performed; and finally, the overall manufacturing of the honeycomb component is completed. The application realizes the additive manufacturing of the 'body' type, has high production efficiency, high material utilization rate, low manufacturing cost and a relatively simple process.

Description

Technical Field

[0001] This invention relates to the field of 3D manufacturing of cellular components, and more specifically to a method for manufacturing cellular components in three dimensions using hollow unit cells. Background Technology

[0002] Honeycomb structural components refer to a material structure composed of small units arranged in a honeycomb pattern, similar to a honeycomb, consisting of many hexagonal or other shaped small units arranged in a repeating pattern. Honeycomb structural components typically possess high strength and stiffness while being relatively lightweight, facilitating lightweight manufacturing and thus finding applications in various industrial fields, particularly construction, machinery manufacturing, and aircraft manufacturing. Complex honeycomb components are difficult to manufacture using traditional methods and suffer from low material utilization. Currently, 3D additive manufacturing can be used for this purpose. Additive manufacturing is a method of creating objects by stacking materials layer by layer. In contrast to traditional material reduction manufacturing methods, additive manufacturing technology can be used with materials such as metals, plastics, and ceramics, and can create objects with complex geometries, suitable for rapid prototyping and customized production.

[0003] Patent US2002015654A1 discloses a method for manufacturing dense three-dimensional products using laser sintering. In a vacuum chamber protected by an inert atmosphere, powder is pre-laid onto a substrate, and a directional energy beam melts the powder to achieve additive manufacturing. This process of piling powder and applying the energy beam is repeated on the next layer of additively manufactured components to achieve structural component manufacturing. The energy beam is typically a laser beam, and the scanning path is programmed and modeled layer by layer according to the component's structure. However, this existing patent uses powder for "point" additive manufacturing, resulting in low production efficiency, high powder particle size requirements, and significant manufacturing costs and difficulties.

[0004] Chinese Patent CN101480753 A discloses a rapid prototyping method for manufacturing metal laminated solids, comprising the following steps: establishing a CAD geometric model of a metal part; using a laser cutting system to cut the inner holes of the metal sheet layers at a first station and removing waste material from the inner holes; using a welding mechanism at a second station to weld the current metal sheet together with the metal sheet below it; using the laser cutting system at the second station to cut the outer contour lines of the metal sheet layers; and moving the lifting worktable downwards (in the negative Z direction) by one step, repeating steps two through six until all layers of metal sheets in the workpiece are bonded or welded together, thereby obtaining a metal laminated solid formed workpiece. This invention solves the forming problem of parts with fully enclosed spatial holes, and allows for the successful application of resistance welding to weld the layers of metal sheets, thereby significantly improving the mechanical properties of the parts. However, the disadvantages of this method are: 1. The manufacturing process requires laser cutting to cut out the inner hole layer by layer, which generates a lot of waste and has a low material utilization rate; 2. Resistance welding requires pressure to be applied to the surface of the component, which is a relatively complex process; 3. The manufacturing process requires the use of an assembly system, a laser cutting system, and a resistance welding system, which makes the equipment complex.

[0005] US Patent No. 4775092A discloses a method and apparatus for manufacturing workpieces by fusion welding, suitable for additive welding of axisymmetric workpieces. The apparatus described in this patent includes a welding head capable of melting filler material and a reusable rotating base that moves with the welding head. During the additive manufacturing process, the molten weld pool is formed, supported, and cooled on the reusable rotating base. The disadvantages of this method are: 1. Low additive manufacturing efficiency; 2. Inability to additively manufacture products with internal honeycomb skeletons; 3. The reusable rotating base is relatively complex to manufacture. Summary of the Invention

[0006] Based on the shortcomings of the aforementioned background technology, and addressing the problems of complex systems and equipment and difficult and inefficient additive manufacturing of honeycomb structure components in existing technologies, this invention aims to provide a method for three-dimensional manufacturing of honeycomb components using hollow unit bodies. This method involves 3D assembly of prefabricated hollow unit bodies to manufacture a honeycomb skeleton, and the use of additive welding to manufacture the outer shell. This method offers high production efficiency, high material utilization, low manufacturing cost, and relatively simple process.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A method for three-dimensionally manufacturing a honeycomb component using hollow unit cells, wherein the three-dimensional component includes a honeycomb skeleton and a shell, the honeycomb skeleton is manufactured by assembling prefabricated hollow unit cells, and the shell is manufactured by additive manufacturing method using welding overlay on the skeleton, comprising the following steps:

[0009] Step S1, Preparation before assembling and manufacturing the honeycomb skeleton: Model the honeycomb skeleton, disassemble it into hollow units of the same structural size, and prefabricate multiple hollow units;

[0010] Step S2, Assemble the skeleton layer by layer: The hollow unit bodies are repeatedly contacted and arranged on the platform to form the first layer of skeleton. The assembly nodes of adjacent hollow unit bodies are laser-spot welded at intervals on one side to form non-penetrating weld points. The non-penetrating weld points connect the hollow unit bodies to form the first layer of skeleton.

[0011] Step S3: Assemble the second layer of the skeleton on the first layer of the skeleton. The assembly position of the hollow unit of the second layer is offset relative to the adjacent hollow unit of the first layer. Perform intermittent single-sided laser spot welding at the assembly node of the hollow unit 1 of the second layer to form through weld points. While using through weld points to spot weld and fix the hollow unit of the second layer of the skeleton, spot weld the second layer of the skeleton and the first layer of the skeleton into a whole.

[0012] Step S4: Similarly, as in step S3 above, assemble the third layer of the skeleton on the second layer of the skeleton.

[0013] Step S5, additive welding of the outer shell: using a laser head with a powder feeding channel, additive welding is carried out from the outer periphery of the first skeleton to form a welding layer, and the welding continues along the outer periphery of the first skeleton to the upper edge of the second skeleton.

[0014] Step S6, repeat steps S4 and S5 until the height of the skeleton layer and the weld overlay layer reaches the component size requirements.

[0015] As a further improvement of the present invention, the thickness of the hollow unit body in step S1 is 0.3~3mm.

[0016] As a further improvement of the present invention, the depth of the non-penetrating weld point in step S2 is 0.8 to 1.0 times the thickness of the hollow unit body.

[0017] As a further improvement of the present invention, in step S3, the specific offset distance between the assembly position of the hollow unit body of the second layer and the adjacent hollow unit body of the first layer is 1 / 2 of the size of the hollow unit body, and the hollow unit body of the second layer does not contact the non-through solder joint of the first layer skeleton.

[0018] As a further improvement of the present invention, in step S3, the laser power of the laser spot welding to form the through weld is greater than the spot welding power of the first layer skeleton, and the depth of the through weld is 1.1 to 1.5 times the thickness of the hollow unit body.

[0019] As a further improvement of the present invention, the assembly of the third layer skeleton in step S4 is specifically as follows: the third layer skeleton is assembled on the second layer skeleton, and the assembly position of the hollow unit of the third layer is offset relative to the adjacent hollow unit of the second layer. The offset distance is also 1 / 2 of the size of the hollow unit, that is, the projected part of the hollow unit of the third layer coincides with the first layer skeleton.

[0020] As a further improvement of the present invention, the laser power density during spot welding of the honeycomb skeleton is 10⁶~10⁸ W / cm². 2 The welding time is 0.03~0.5s.

[0021] As a further improvement of the present invention, the laser power density during the additive welding of the outer shell is 10⁵~10⁶ W / cm². 2 The thickness of a single layer of weld overlay is 0.1~1.0mm.

[0022] As a further improvement of the present invention, laser spot welding is performed by a ring scanning method during honeycomb skeleton spot welding. The scanning diameter is 1.2 to 1.5 times the diameter of the non-scanning laser spot welding spot, the scanning frequency is 50 to 250 Hz, and the diameter of the formed spot is 1.2 to 1.6 times the thickness of the hollow unit.

[0023] As a further improvement of the present invention, depending on the different thicknesses of the outer shell design, additive manufacturing is carried out by single-layer or multi-layer welding.

[0024] As a further improvement of the present invention, when spot welding the honeycomb skeleton, plasma spot welding is used, and the spot welding current is ≤120A.

[0025] As a further improvement of the present invention, when spot welding the honeycomb skeleton, laser-plasma composite spot welding is used, with laser power ≤2000W and plasma current ≤80A.

[0026] As a further improvement of the present invention, the honeycomb skeleton is connected by seam welding during assembly and manufacturing.

[0027] As a further improvement of the present invention, the micro-beam plasma additive manufacturing method is used during the shell overlay welding additive manufacturing.

[0028] As a further improvement of the present invention, a laser-plasma composite additive manufacturing method is used in the process of welding the outer shell.

[0029] As a further improvement of the present invention, an electric arc additive manufacturing method is used when the outer shell is welded together.

[0030] Therefore, the present invention has the following beneficial effects:

[0031] This invention provides a method for three-dimensionally manufacturing honeycomb components using hollow unit cells. The method involves 3D assembling prefabricated hollow unit cells to create a honeycomb skeleton, and then using a welding additive manufacturing method to create the outer shell.

[0032] 1) The shift from point-based additive manufacturing to volumetric additive manufacturing has significantly improved production efficiency;

[0033] 2) By using prefabricated hollow unit assemblies, honeycomb skeletons are manufactured through repeated arrangement, assembly, and spot welding. The manufacturing method is simple and repeatable, and the programming difficulty is greatly reduced during intelligent manufacturing.

[0034] 3) The manufacturing process only requires a small-load assembly robot, a robot with a laser head, and a simple operating table. The equipment is simple in structure and easy to operate.

[0035] 4) The outer shell of the honeycomb structure component is manufactured by additive welding on the outside of the honeycomb skeleton. The skeleton can serve as the base for additive manufacturing, eliminating the need for tooling and resulting in higher dimensional accuracy of the welded outer shell.

[0036] 5) Furthermore, the materials used for the honeycomb skeleton and the shell can be selected separately, allowing for the manufacture of dissimilar material components or gradient material shells as required. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only a part of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of spot welding during the assembly of the first layer of the skeleton.

[0039] Figure 2 This is a schematic diagram of the spot welding assembly of the first three layers of the frame;

[0040] Figure 3 Schematic diagram of additive manufacturing for honeycomb skeleton shell;

[0041] Figure 4 A schematic diagram of a honeycomb structure component;

[0042] Figure 5 This is a schematic diagram of a non-through-hole weld joint.

[0043] Figure 6 A cross-sectional photograph of a through-weld joint;

[0044] Figure 7 A cross-sectional photograph of a through-type laser spot weld;

[0045] Explanation of reference numerals in the attached figures, wherein:

[0046] Hollow unit 1, non-through solder joint 2, first layer skeleton 3, through solder joint 4, second layer skeleton 5, third layer skeleton 6, laser head 7, powder feeding channel 8, weld overlay layer 9, honeycomb skeleton 10, outer shell 11. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] The hollow unit cells constituting the honeycomb structure components can be hollow hexagonal prisms, hollow cubes, hollow parallel polyhedra, hollow cylinders, or other hollow unit cells with a certain thickness. In this embodiment, a hollow hexagonal prism is used as an example of hollow unit cell 1.

[0050] This embodiment provides a method for three-dimensionally manufacturing honeycomb components using hollow unit cells, such as... Figure 4 The three-dimensional component includes a honeycomb skeleton 10 and a shell 11. The honeycomb skeleton 10 is manufactured by assembling prefabricated hollow unit bodies 1, and the shell 11 is manufactured on the outside of the skeleton by a welding additive manufacturing method, including the following steps:

[0051] Reference Figures 1-3 The first stage involves 3D assembly and manufacturing of the honeycomb skeleton 10. The assembly steps are as follows:

[0052] 1) Model the honeycomb skeleton 10 and disassemble it into a composite body composed of hollow unit bodies 1 with the same structural dimensions. The thickness of the hollow unit body 1 is 0.3~3mm.

[0053] 2) Prefabricate a batch of hollow unit bodies 1 according to the dimensions of the disassembled model;

[0054] 3) Assemble and manufacture layer by layer according to the model. First, use hollow unit 1 to repeatedly contact and arrange the first layer of skeleton 3 on the platform. Perform intermittent single-sided laser spot welding on the assembly nodes of adjacent hollow unit 1 to form non-through weld points 2, referring to... Figure 5 The depth of the non-penetrating solder joint 2 is 0.8 to 1.0 times the thickness of the hollow unit body. The non-penetrating solder joint 2 connects the hollow unit body 1 to form a solid first-layer skeleton 3.

[0055] 4) Assemble the second layer of the skeleton 5 above the first layer skeleton 3 using hollow unit bodies 1 according to the model. The assembly position of the hollow unit bodies 1 in the second layer is offset relative to the adjacent hollow unit bodies 1 in the first layer. The offset distance is equal to 1 / 2 of the size of the hollow unit body. The hollow unit bodies 1 in the second layer do not contact the non-penetrating weld points 2 of the first layer skeleton. Perform intermittent unilateral laser spot welding at the assembly nodes of the hollow unit bodies 1 in the second layer to form penetrating weld points 4. The laser power is greater than the spot welding power of the first layer skeleton. Refer to... Figure 6 The depth of the through-weld point 4 is 1.1 to 1.5 times the thickness of the hollow unit 1. By using the through-weld point 4 to spot weld and fix the hollow unit 1 of the second frame 5, the second frame 5 and the first frame 3 are spot welded into a whole.

[0056] 5) Assemble the third layer skeleton 6 above the second layer skeleton 5 using hollow unit 1 according to the model. The assembly position of the hollow unit 1 of the third layer is offset relative to the adjacent hollow unit 1 of the second layer. The offset distance is equal to 1 / 2 of the size of the hollow unit. That is, the projection of the hollow unit 1 of the third layer coincides with the first layer skeleton 3. The hollow unit 1 of the third layer does not contact the through weld point 4 of the second layer skeleton. Perform intermittent single-sided laser spot welding at the assembly node of the hollow unit 1 of the third layer to form through weld point 4. The laser power is the same as the spot welding power of the second layer skeleton. The depth of the through weld point 4 is 1.1 to 1.5 times the thickness of the hollow unit 1. While using the through weld point 4 to spot weld and fix the hollow unit 1 of the third layer skeleton 6, the third layer skeleton 6 is welded to the first two layers skeleton into a whole.

[0057] like Figure 3 As shown, the second stage, the additive manufacturing of the outer shell 11, includes the following steps:

[0058] 1) Using a laser head 7 with a powder feeding channel 8, additive manufacturing is carried out from the periphery of the first skeleton 3 by laser powder feeding to form a weld overlay layer 9.

[0059] 2) Continue welding along the periphery of the first layer skeleton 3 until the height of the weld layer 9 reaches the upper edge of the second layer skeleton 5.

[0060] Phase Three:

[0061] Repeat steps 4) and 5) of the first stage to assemble and manufacture the fourth and fifth layers of the skeleton above the third layer skeleton 6.

[0062] Phase Four:

[0063] Repeat the second stage operation, continuing laser powder feeding and additive welding on the lower edge of the outer periphery of the third skeleton 6 and on the upper surface of the weld overlay layer 9 until the height of the weld overlay layer reaches the upper edge of the fourth skeleton.

[0064] Phase 5:

[0065] 1) Repeat the work of the third and fourth stages until the skeleton height reaches the design height of the honeycomb skeleton 10;

[0066] 2) Perform single-sided laser spot welding at the assembly node positions of the uppermost hollow skeleton unit 1. For node positions that can contact the lower skeleton, use a larger laser power to form through-type weld points 4, and for node positions that do not contact the lower skeleton, use a smaller laser power to form non-through-type weld points 2.

[0067] 3) Laser powder welding additive manufacturing is carried out on the basis of the outer layer until the size requirements of the outer shell 11 are met. Thus, the three-dimensional manufacturing of the honeycomb structure product that meets the design requirements is completed.

[0068] Preferably, the laser power density is 10 when the honeycomb skeleton is spot welded 10 times. 6 ~10 8 W / cm 2 The welding time is 0.03~0.5s; the laser power density is 10 when the outer shell is overlaid with additive manufacturing material. 5 ~10 6 W / cm 2 The thickness of a single layer of weld overlay is 0.1~1.0mm.

[0069] like Figure 7 To obtain a cross-sectional photograph of the through-type weld point in the scanning laser spot welding, the honeycomb skeleton 10 was spot welded using a ring scanning method. The scanning diameter was 1.2 to 1.5 times the diameter of the non-scanning laser spot weld point, and the scanning frequency was 50 to 250 Hz. The diameter of the resulting weld point was 1.2 to 1.6 times the thickness of the hollow unit 1.

[0070] It should be mentioned that, depending on the design thickness of the outer shell 11, single-layer or multi-layer additive welding can be used; when spot welding the honeycomb skeleton 10, plasma spot welding can be used with a spot welding current ≤120A, or laser-plasma composite spot welding can be used with a laser power ≤2000W and a plasma current ≤80A, or other single-sided spot welding methods can be used; when assembling the honeycomb skeleton 10, seam welding can also be used for connection; when the outer shell 11 is manufactured by additive welding, micro-beam plasma additive manufacturing, laser-plasma composite additive manufacturing, arc additive manufacturing, and other methods can also be used; when the outer shell 11 is manufactured by additive welding, the welding material can be selected separately.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for three-dimensionally manufacturing honeycomb components using hollow unit cells, characterized in that, The three-dimensional component includes a honeycomb skeleton and a shell. The honeycomb skeleton is manufactured by assembling prefabricated hollow unit bodies, and the shell is manufactured by overlaying additive manufacturing on the skeleton, including the following steps: Step S1, Preparation before assembling and manufacturing the honeycomb skeleton: Model the honeycomb skeleton, disassemble it into hollow units of the same structural size, and prefabricate multiple hollow units; Step S2, Assemble the skeleton layer by layer: The hollow unit bodies are repeatedly contacted and arranged on the platform to form the first layer of skeleton. The assembly nodes of adjacent hollow unit bodies are laser-spot welded at intervals on one side to form non-penetrating weld points. The non-penetrating weld points connect the hollow unit bodies to form the first layer of skeleton. Step S3: Assemble the second layer of the skeleton on the first layer of the skeleton. The assembly position of the hollow unit of the second layer is offset relative to the adjacent hollow unit of the first layer. Perform intermittent single-sided laser spot welding at the assembly nodes of the hollow unit of the second layer to form through-weld points. Use the through-weld points to spot weld and fix the hollow unit of the second layer of the skeleton, and spot weld the second layer of the skeleton and the first layer of the skeleton into a whole. Step S4: Similarly, as in step S3 above, assemble the third layer of the skeleton on the second layer of the skeleton. Step S5, Additive shell overlay: Using a laser head with a powder feeding channel, additive overlay is performed from the periphery of the first skeleton layer to form an overlay layer, and the overlay continues along the periphery of the first skeleton layer to the upper edge of the second skeleton layer. Step S6, repeat steps S4 and S5 until the height of the skeleton and the weld overlay layer reaches the dimensional requirements of the component.

2. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, The thickness of the hollow unit body in step S1 is 0.3~3mm.

3. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, The depth of the non-penetrating weld point in step S2 is 0.8 to 1.0 times the thickness of the hollow unit.

4. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, In step S3, the specific offset distance between the assembly position of the hollow unit in the second layer and the adjacent hollow unit in the first layer is 1 / 2 of the size of the hollow unit, and the hollow unit in the second layer does not contact the non-through solder joints of the first layer skeleton.

5. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, In step S3, the laser power of the laser spot welding forming the through weld is greater than the spot welding power of the first layer skeleton, and the depth of the through weld is 1.1 to 1.5 times the thickness of the hollow unit.

6. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 4, characterized in that, In step S4, assembling the third layer of the skeleton specifically involves assembling the third layer of the skeleton on the second layer of the skeleton. The assembly position of the hollow unit of the third layer is offset relative to the adjacent hollow unit of the second layer, and the offset distance is also 1 / 2 of the size of the hollow unit. That is, the projected part of the hollow unit of the third layer coincides with the first layer of the skeleton.

7. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, The laser power density is 10 when spot welding the honeycomb skeleton. 6 ~10 8 W / cm 2 The welding time is 0.03~0.5s.

8. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, The laser power density during the additive manufacturing of the outer shell is 10. 5 ~10 6 W / cm 2 The thickness of a single layer of weld overlay is 0.1~1.0mm.

9. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, When spot welding the honeycomb skeleton, a circular scanning method is used for laser spot welding. The scanning diameter is 1.2 to 1.5 times the diameter of the non-scanning laser spot welding spot, the scanning frequency is 50 to 250 Hz, and the diameter of the resulting spot is 1.2 to 1.6 times the thickness of the hollow unit.

10. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, Depending on the thickness of the outer shell design, additive manufacturing is carried out by single-layer or multi-layer welding.

11. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, When spot welding the honeycomb skeleton, plasma spot welding is used, and the spot welding current is ≤120A.

12. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, When spot welding the honeycomb skeleton, laser-plasma composite spot welding is used, with laser power ≤2000W and plasma current ≤80A.

13. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, During the assembly and manufacturing of the honeycomb skeleton, seam welding is used for connection.

14. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, When the outer shell is welded together in additive manufacturing, the micro-beam plasma additive manufacturing method is used.

15. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, When the outer shell is welded and additively manufactured, a laser-plasma composite additive manufacturing method is used.

16. The method for three-dimensionally manufacturing honeycomb components using hollow unit cells according to claim 1, characterized in that, When the outer shell is welded together in additive manufacturing, the electric arc additive manufacturing method is used.

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