Additive Manufacturing Device and Method for Metal Thin-Walled Parts

Abstract

The present invention discloses an additive manufacturing device and method for a thin-walled metal part. The additive manufacturing device for the thin-walled metal part includes a spraying system, a working chamber, a substrate disposed in the working chamber, and a motion assembly capable of driving the substrate to move along a preset path. A solidification zone for solidifying the melt sprayed by the spraying system is disposed above the substrate. A cooling wall is disposed on one side of the solidification zone, and a baffle is disposed on the other side. This application directly prints the workpiece using a continuous metal liquid flow, which can not only obtain a better internal structure but also achieve a higher preparation efficiency, and has good technical development prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgy, and more particularly, to an additive manufacturing apparatus and method for thin-walled metal parts. Background Art

[0002] The processing of thin-walled metal parts is a relatively mature technology in the industry and can be achieved through both casting and pressure processing methods. However, for alloys with poor melt fluidity and low plasticity, it is difficult to obtain high-quality thin-walled metal workpieces by traditional methods. Additive manufacturing is an important solution to the above problems. In the disclosed additive manufacturing methods, the raw materials for additive manufacturing can be powders, wires, and liquid metals. Among them, using liquid metal for additive manufacturing is the molding method with the lowest cost and the highest preparation efficiency.

[0003] Due to the strong flowability of liquid metal, it is not easy to prepare workpieces with certain dimensional accuracy. A large number of related technologies are used to manufacture high-quality ingots. For example, the patent with the application number CN201811363977.4 discloses an additive manufacturing equipment and method for large-sized equiaxed crystal aluminum alloy ingots by array spraying, and the patent with the application number CN201910513420.2 discloses a preparation device and method for equiaxed crystal ingots by melt micro-region impact. The above patent technologies all use continuous metal liquid columns for printing, and the prepared ingots have dense internal structures, fine grains, and less macrosegregation. For metal workpieces, metal micro-droplet printing is mostly used. For example, the patent with the application number CN201310713252.4 discloses a metal micro-droplet orbit-controlled three-dimensional printing forming device and method. Using metal micro-droplets for additive manufacturing has the advantage that the complexity of the workpiece can be greatly improved, but there are still problems such as low preparation efficiency and low workpiece density.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an additive manufacturing apparatus and method for thin-walled metal parts, which can improve the performance of thin-walled metal workpieces while ensuring production efficiency.

[0006] The present invention is implemented as follows:

[0007] In a first aspect, the present invention provides an additive manufacturing apparatus for thin-walled metal parts, including a spraying system, a working chamber, a substrate disposed in the working chamber, and a moving component capable of driving the substrate to move along a preset route. A solidification zone for solidifying the melt sprayed by the spraying system is disposed above the substrate, a cooling wall is disposed on one side of the solidification zone, and a baffle is disposed on the other side.

[0008] In an alternative embodiment, the cooling wall is fixed to the substrate, and the shape of the cooling wall is adapted to the shape of the thin-walled part to be manufactured;

[0009] Preferably, the cooling wall is cylindrical;

[0010] Preferably, a heat exchange channel for the flow of a heat exchange medium is provided inside the cooling wall.

[0011] In an alternative embodiment, the baffle is tangentially arranged with the thin-walled part to be manufactured at the location where the baffle is located;

[0012] Preferably, there are two or more baffles, and the two or more baffles are sequentially arranged along the opposite direction of the movement of the thin-walled part to be manufactured.

[0013] In an alternative embodiment, the movement assembly includes a translation assembly for driving the substrate to move on a horizontal plane and a push-pull assembly for driving the substrate to move in a vertical direction;

[0014] Preferably, the movement assembly includes a downward rotation mechanism.

[0015] In an alternative embodiment, a limiting assembly for limiting the movement path of the substrate is further included;

[0016] Preferably, a lining is provided between the limiting assembly and the substrate;

[0017] Preferably, the substrate is disc-shaped, and the limiting assembly is a sleeve sleeved on the substrate and coaxially arranged with the substrate;

[0018] Preferably, the baffle is arranged above the sleeve, and the minimum distance between the baffle and the axis of the sleeve is less than the inner diameter of the sleeve.

[0019] In an alternative embodiment, a positioning pin is provided on the substrate;

[0020] Preferably, the positioning pin includes a first positioning pin for limiting the cooling wall and / or a second positioning pin for limiting the thin-walled part to be manufactured.

[0021] In an alternative embodiment, a vacuum pumping system and a protective gas filling system are connected to the working chamber.

[0022] In an alternative embodiment, the spraying system includes a crucible for containing molten liquid and a nozzle for spraying a metal liquid column onto a solidification zone;

[0023] Preferably, there are two or more nozzles, and the two or more nozzles are arranged along the thickness direction or the radial direction of the thin-walled part to be manufactured;

[0024] Preferably, the crucible and the nozzle are connected through a runner, and a plug rod capable of disconnecting or conducting the flow of the melt in the runner is provided on the runner;

[0025] Preferably, a crucible cover is provided on the crucible, and an air inlet is provided on the crucible;

[0026] Preferably, it further includes a heating device for heating or insulating the materials in the crucible.

[0027] In a second aspect, the present invention provides a method for additive manufacturing of a thin-walled metal part. Adjust the position of the substrate in the additive manufacturing device for the thin-walled metal part described above so that the solidification zone is located on the substrate. Under the protection of a protective gas, turn on the spraying system and the moving component to obtain a thin-walled part.

[0028] In an alternative embodiment, the thin-walled part includes a sheet-shaped part and a cylindrical part;

[0029] Preferably, the material of the thin-walled part is aluminum alloy, magnesium alloy, titanium alloy, zinc alloy, or steel material.

[0030] The present invention has the following beneficial effects:

[0031] This application directly prints workpieces using a continuous metal liquid flow, which can not only obtain a better internal structure but also a higher preparation efficiency, and has good technical development prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic structural diagram of an additive manufacturing device for a thin-walled metal part in an embodiment of this application;

[0034] Figure 2 It is a schematic diagram of the installation position of the baffle in an embodiment of this application.

[0035] Reference numerals: 100 - thin-walled part; 111 - crucible; 112 - nozzle; 113 - runner; 114 - plug rod; 115 - heating device; 120 - working chamber; 130 - substrate; 131 - positioning pin; 140 - moving component; 150 - cooling wall; 151 - heat exchange channel; 160 - baffle; 170 - limiting component; 171 - lining. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0040] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] First Embodiment

[0043] Please refer toFigure 1 and Figure 2 Figure 1 and Figure 2 , this embodiment provides an additive manufacturing apparatus for a metal thin-walled part 100, which includes an injection system, a working chamber 120, a substrate 130 disposed in the working chamber 120, and a motion assembly 140 capable of driving the substrate 130 to move along a preset path. A solidification zone for solidifying the liquid column injected by the injection system is disposed above the substrate 130. A cooling wall 150 is disposed on one side of the solidification zone, and a baffle 160 is disposed on the other side.

[0044] In this application, the nozzle 112 of the injection system is fixed, and the position of the solidification zone is fixed. When the apparatus is in the initial position, the solidification zone is located on the substrate 130. The alloy injects a liquid column onto the solidification zone on the substrate 130 through the nozzle 112 of the injection system. At the same time, the motion assembly 140 drives the substrate 130 to move along a preset path. After the first layer of the metal thin-walled part 100 is injected, the substrate 130 moves away from the solidification zone, so that the nozzle 112 continues to inject the liquid column onto the surface of the metal thin-walled part 100 that has moved to the solidification zone. Through the cooperation of the motion assembly 140 and the injection system, the metal thin-walled part 100 is obtained. During the processing of the metal thin-walled part 100, the cooling wall 150 can provide a stable cooling condition to accelerate the solidification of the metal liquid column.

[0045] In the general process of forming liquid metal, due to the large fluidity of liquid metal, a mold is generally required to complete the shaping. However, it is very difficult to set a mold during the liquid printing process of some metal thin-walled parts 100. The reasons are as follows: ① For thin-walled or cylindrical parts with a large height, after setting the mold, the molten liquid column ejected from the nozzle 112 needs to fly a long distance to reach the bottom surface of the mold to start filling. During this process, the flow state will change malignantly, or it will solidify in advance due to the deflection of the liquid column angle during the filling process and contact the mold wall, resulting in blockage of the filling; ② Even if the preparation of the metal thin-walled part 100 is completed, it is very difficult to take out the cylindrical part without damaging the mold. In the present invention, the baffle 160 can not only play the role of constraining the mold, but also facilitate part taking. At the same time, in cooperation with the motion assembly 140, it can keep the additive surface at a stable position all the time, so that the flying distance of the molten liquid column remains unchanged and the flow state of the liquid column is ensured to be stable.

[0046] Further, the cooling wall 150 is fixed on the substrate 130, and the shape of the cooling wall 150 is adapted to the shape of the thin-walled part 100 to be manufactured; the cooling wall 150 is fixed on the substrate 130 and is located on one side of the solidification zone, that is, the cooling wall 150 can cover one side of the thin-walled part 100 to be manufactured, provide a stable cooling condition for the thin-walled part 100 to be manufactured, and can play a role in heat preservation.

[0047] Preferably, the cooling wall 150 is cylindrical and is suitable for the manufacture of cylindrical parts;

[0048] Preferably, a heat exchange channel 151 for the flow of a heat exchange medium is provided in the cooling wall 150, and the heat exchange medium takes away the heat absorbed by the cooling wall 150 from the thin-walled part 100 to be manufactured.

[0049] If the cooling is provided at the bottom of the thin-walled part 100, the cooling conditions at different height positions will be different. By providing the cooling wall 150, the baffle 160 and the corresponding moving component 140, the preparation process (molten surface) can always be maintained at a constant height, ensuring complete consistency from melt input to cooling.

[0050] Further, the baffle 160 is tangent to the thin-walled part 100 to be manufactured at the location where it is located;

[0051] Preferably, there are two or more baffles 160, and the two or more baffles 160 are arranged in sequence along the opposite direction of the movement of the thin-walled part 100 to be manufactured.

[0052] The design of the baffle 160 can reduce the contact area between the restraint structure and the thin-walled part 100. When the baffle 160 is tangent to the thin-walled part 100 to be manufactured at the location where it is located, the contact between the baffle 160 and the casting blank is a point contact, which can greatly reduce the frictional force between the casting blank and the baffle 160 during rotation, enabling the workpiece to move or rotate smoothly.

[0053] The number of baffles 160, the distance between adjacent baffles 160, and the height of the baffle 160 in this embodiment can be adjusted as needed. For example, if the metal melt cools slowly and has strong fluidity, the baffles 160 will be set relatively densely, and the height of the baffles 160 will also be relatively high. At this time, the temperature of the cooling wall 150 can also be correspondingly reduced.

[0054] When the thin-walled part 100 to be manufactured has a certain curvature, the baffle 160 can be arranged tangentially along the thin-walled part 100 to be manufactured at the location where it is located; when the thin-walled part 100 to be manufactured is a plate-like structure, the baffle 160 can be provided with a certain curvature.

[0055] Further, the moving component 140 includes a translation component that drives the substrate 130 to move on a horizontal plane and a push-pull component that drives the substrate 130 to move in the vertical direction;

[0056] Preferably, the moving component 140 includes a downward rotation mechanism.

[0057] The moving component 140 drives the substrate 130 to move in the horizontal and vertical directions, so that thin-walled parts 100 of different shapes can be processed. When processing plate-shaped thin-walled parts 100, the translational component can be a telescopic rod capable of driving the substrate 130 to reciprocate. When processing cylindrical thin-walled parts 100, the translational component can be a motor capable of driving the substrate 130 to rotate. When processing irregular thin-walled parts 100, it is necessary to plan the movement path of the substrate 130 according to the actual situation by using numerical control technology. The specific implementation form of the moving component 140 can be set by those skilled in the art according to needs.

[0058] Further, it further includes a limiting component 170 for limiting the movement path of the substrate 130. On the one hand, the limiting component 170 limits the substrate 130 to prevent the substrate 130 from deviating from the preset path. On the other hand, it can play a role in protecting the thin-walled part 100 of the semi-finished product on the substrate 130.

[0059] Preferably, a lining 171 is provided between the limiting component 170 and the substrate 130. Friction may occur between the substrate 130 and the limiting component 170. On the one hand, the lining 171 can reduce friction. On the other hand, selecting a lining 171 with good wear resistance can improve the service life of the substrate 130 and the limiting component 170.

[0060] Preferably, the substrate is disc-shaped, and the limiting component 170 is a sleeve sleeved on the substrate 130 and coaxially arranged with the substrate 130. When processing cylindrical parts, the disc-shaped substrate can rotate and move up and down in the sleeve, and the sleeve can play a role in limiting.

[0061] Preferably, the baffle 160 is arranged above the sleeve, and the minimum distance between the baffle 160 and the axis of the sleeve is less than the inner diameter of the sleeve.

[0062] The baffle 160 can limit the radius of the cylindrical part, so that the outer diameter of the cylindrical part does not exceed the inner diameter of the fixed sleeve below, and there is always a gap between the two, which is convenient for rotation.

[0063] Further, a positioning pin 131 is provided on the substrate 130.

[0064] Preferably, the positioning pin 131 includes a first positioning pin 131 for limiting the cooling wall 150 and / or a second positioning pin for limiting the thin-walled part 100 to be manufactured.

[0065] The positioning pin 131 is provided on the substrate 130, which can respectively position the cooling wall 150 or the thin-walled part 100 to be manufactured. Positioning the thin-walled part 100 to be manufactured helps to control the size of the thin-walled part 100 to be manufactured on the one hand, and can prevent the thin-walled part 100 from detaching from the substrate 130 during the movement process on the other hand.

[0066] Further, a vacuum pumping system and a protective gas filling system are connected to the working chamber 120, facilitating the extraction of air from the working chamber 120 and the filling of protective gas.

[0067] Further, the injection system includes a crucible 111 for containing molten liquid and a nozzle 112 for injecting a metal liquid column onto the solidification zone;

[0068] Preferably, there are two or more nozzles 112, and the two or more nozzles 112 are arranged along the thickness direction or the radial direction of the thin-walled part 100 to be manufactured. The number and the arranged width of the nozzles 112 can be adjusted according to the thickness of the thin-walled part 100 to be processed;

[0069] Preferably, the crucible 111 and the nozzle 112 are connected through a runner 113, and a plug rod 114 capable of disconnecting or conducting the melt flow in the runner is arranged on the runner 113, facilitating the control of the on / off of the injection system;

[0070] Preferably, a crucible cover is arranged on the crucible 111, and an air inlet hole is arranged on the crucible 111, facilitating the extraction of air from the working chamber 120 and the filling of protective gas;

[0071] Preferably, a heating device 115 for heating or insulating the materials in the crucible 111 is further included, which can heat the raw materials to the molten state and keep them warm.

[0072] Second Embodiment

[0073] This embodiment provides an additive manufacturing method for a metal thin-walled part 100. The position of the substrate 130 in the additive manufacturing device of the aforementioned metal thin-walled part 100 is adjusted so that the solidification zone is located on the substrate 130. Under the protection of protective gas, the injection system and the motion assembly 140 are turned on to obtain the thin-walled part 100.

[0074] Utilize Figure 1 and Figure 2 When producing a cylindrical part with the device, operate according to the following steps:

[0075] ① Use the plug rod 114 to seal the runner 113, turn on the heating device 115 to preheat the runner 113 and the crucible 111, open the crucible cover, pour the alloy melt to be printed into the crucible 111, and close the crucible cover for static heat preservation;

[0076] ② After the working chamber 120 is evacuated, fill it with protective gas to a certain pressure P;

[0077] ③ Pass a cooling medium through the cold core, and adjust the upper surface of the rotating bracket to be flush with the upper surface of the fixed sleeve. Turn on the rotational motion to make the substrate 130 drive the cold core to rotate;

[0078] ④ Open the plug rod 114, and at the same time, introduce gas into the crucible 111, so that the molten metal in the crucible 111 is ejected through the runner 113 and the nozzle 112 under pressure to the jet point, and the jet point is located in the solidification zone.

[0079] ⑤ When the height of the blank is close to the height of the baffle 160, move the rotating bracket downward at a speed v, and the downward pulling speed is consistent with the increasing speed of the blank height.

[0080] ⑥ When the height of the blank reaches the length requirement of the tubular part, push the plug rod 114 to stop the melt jet, and at the same time, stop introducing gas into the crucible 111, turn off the heating device 115 and the downward pulling and rotating mechanism, so that the tubular part blank stops moving. After the sample cools down, turn off the cooling medium, open the lower cavity, and remove the tubular part.

[0081] Further, the thin-walled part 100 includes a sheet-shaped part and a tubular part.

[0082] Preferably, the material of the thin-walled part 100 is aluminum alloy, magnesium alloy, titanium alloy, zinc alloy, or steel material.

[0083] Specifically, using Figure 1 and Figure 2 When using the device to prepare a tubular part with aluminum alloy, the material grade is A356, the set aluminum liquid temperature is 680 °C, the number of nozzles 112 is 5, the spacing between adjacent nozzles 112 is 8 mm, the number of baffles 160 is 4, the height of the baffle 160 is 10 mm, and one baffle 160 is placed every 60 degrees; the rotation speed of the rotating and downward pulling mechanism driving the substrate 130 to rotate is 5 r / min, and the downward pulling speed is 30 mm / min; the outer diameter of the cold core is 300 mm, and the pressure in the working chamber 120 is normal pressure. After printing, the inner diameter of the tubular part blank is 300 mm, the outer diameter is 380 mm, and the length is 500 mm. The solidification structure of the casting blank is dense and the composition is uniform.

[0084] In this embodiment, the alloy forms multiple liquid columns through several nozzles 112 and sprays them onto the surface of the annular tubular blank. The downward pulling speed is 30 mm / min, that is, a tubular part with a height of 30 mm can be prepared per minute, and the preparation speed is high.

[0085] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. 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. An additive manufacturing device for a thin-walled metal part, characterized in that, It includes an injection system, a working chamber, a substrate disposed in the working chamber, and a moving component capable of driving the substrate to move along a preset path. Above the substrate, there is a solidification zone for solidifying the melt ejected by the injection system. The position of the solidification zone is fixed. A cooling wall is disposed on one side of the solidification zone, and a baffle is disposed on the other side. The baffle is tangentially disposed with the thin-walled part to be manufactured at the location where it is located. There are more than two baffles, and the more than two baffles are sequentially disposed along the opposite direction of the movement of the thin-walled part to be manufactured. The moving component includes a translation component for driving the substrate to move on a horizontal plane and a push-pull component for driving the substrate to move in the vertical direction.

2. The additive manufacturing device for a thin-walled metal part according to claim 1, characterized in that The cooling wall is fixed on the substrate, and the shape of the cooling wall is adapted to the shape of the thin-walled part to be manufactured.

3. The additive manufacturing apparatus for a thin-walled metal part according to claim 2, characterized in that, The cooling wall is cylindrical.

4. The additive manufacturing device for the thin-walled metal part according to claim 2, wherein A heat exchange channel for the flow of a heat exchange medium is provided inside the cooling wall.

5. The additive manufacturing device for a thin-walled metal part according to claim 4, characterized in that, The moving component includes a downward rotation mechanism.

6. The additive manufacturing device for the thin-walled metal part according to claim 1, wherein, It further includes a limit component for limiting the movement path of the substrate.

7. The additive manufacturing apparatus for a thin-walled metal part according to claim 6, characterized in that, A lining is provided between the limit component and the substrate.

8. The additive manufacturing device for the thin-walled metal part according to claim 6, characterized in that, The substrate is disc-shaped, and the limit component is a sleeve sleeved on the substrate and coaxially disposed with the substrate.

9. The additive manufacturing device for a thin-walled metal part according to claim 6, characterized in that The baffle is disposed above the sleeve, and the minimum distance between the baffle and the axis of the sleeve is less than the inner diameter of the sleeve.

10. The additive manufacturing device for the thin-walled metal part according to claim 1, characterized in that, A positioning pin is provided on the substrate.

11. The additive manufacturing device for the thin-walled metal part according to claim 10, characterized in that, The positioning pin includes a first positioning pin for limiting the cooling wall and / or a second positioning pin for limiting the thin-walled part to be manufactured.

12. The additive manufacturing device for the thin-walled metal part according to claim 1, characterized in that, A vacuum pumping system and a protective gas filling system are connected to the working chamber.

13. The additive manufacturing device for a thin-walled metal part according to claim 1, characterized in that, The injection system includes a crucible for containing the melt and a nozzle for ejecting the melt onto the solidification zone.

14. The additive manufacturing device for a thin-walled metal part according to claim 13, characterized in that, There are more than two nozzles, and the more than two nozzles are disposed along the thickness direction or the radial direction of the thin-walled part to be manufactured.

15. The additive manufacturing device for the thin-walled metal part according to claim 13, characterized in that, The crucible and the nozzle are connected through a flow channel, and a plug rod capable of disconnecting or conducting the flow of the melt in the chute is provided on the flow channel.

16. The additive manufacturing device for a thin-walled metal part according to claim 13, characterized in that, A crucible cover is provided on the crucible, and an air inlet hole is provided on the crucible.

17. The additive manufacturing apparatus for a thin-walled metal part according to claim 13, characterized in that, It further includes a heating device for heating or insulating the material in the crucible.

18. An additive manufacturing method for a thin-walled metal part, characterized in that, Adjust the position of the substrate in the additive manufacturing device for a metal thin-walled part according to any one of claims 1-17 so that the solidification zone is located on the substrate. Under the protection of a protective gas, turn on the injection system and the moving component to obtain a thin-walled part.

19. The additive manufacturing method for the thin-walled metal part according to claim 18, characterized in that, The thin-walled part includes a sheet-shaped part or a cylindrical part.

20. The additive manufacturing method for the thin-walled metal part according to claim 18, wherein The material of the thin-walled part is aluminum alloy, magnesium alloy, titanium alloy, zinc alloy, or steel material.

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