A ceramic multi-material integrated additive manufacturing forming system and method

Abstract

The present invention discloses a ceramic multi-material integrated additive manufacturing forming system and method, which relates to the technical field of additive manufacturing and solves the technical problems of low powder spreading efficiency of ceramic multi-material powders and easy contamination between multi-material powders. The key points of its technical solution are that the powder spreading mechanism is connected to the powder storage cylinder through a powder guiding tube and is connected to the main guide rail through an arc-shaped guide rail. The working cylinder is installed on the support platform and is driven by a ball screw. The support platform is installed on a slide rail driven by a driving motor to cooperate to complete processes such as powder spreading, powder pressing, and laser sintering. The powder spreading mechanism is provided with a powder bin, a polarization mechanism, a clamping plate, an openable and closable support plate, a vibrating sieve, a camera, etc. The clamping plate completes the truncation of the powder spreading capacity each time. The openable and closable support plate pours the powder onto the vibrating sieve. The vibrating sieve is provided with uniformly distributed small holes. The polarization mechanism drives the vibrating sieve to work to complete the powder spreading process in the "surface" area, improving the working efficiency of the powder spreading system.

Description

Technical Field

[0001] This application relates to the field of additive manufacturing technology, and particularly relates to a ceramic multi-material integrated additive manufacturing forming system and method. Background Art

[0002] Due to its excellent properties such as high strength, high temperature resistance, and corrosion resistance, ceramic materials, especially ceramic multi-material products, have very important applications in various fields such as medical treatment, aerospace, and microwave communication. However, the traditional ceramic production and manufacturing process has certain requirements for the quantity of ceramic forming materials, the shape of the ceramic product, and the shape and structure of the inner cavity, and can no longer meet the needs of modern industry for ceramic products. Ceramic additive manufacturing technology is particularly suitable for manufacturing some ceramic products restricted by traditional ceramic manufacturing processes.

[0003] Selective laser sintering technology (SLS) is one of the ceramic additive manufacturing technologies. Its working principle is as follows: First, a layer of ceramic powder is pre-laid through a powder feeding and spreading device, and then, according to the printing trajectory formed by the model data, a laser light source is controlled to selectively sinter the pre-laid solid powder. After a single layer is printed, a new layer of powder is laid for sintering. The above process is continuously repeated, and the three-dimensional entity of the required shape is formed by layer-by-layer laser sintering and curing, and then, through post-processing, the final part is obtained.

[0004] Traditional SLS ceramic additive manufacturing equipment mainly uses the screw, scraper, or blade mechanism of the powder feeding system to extrude and scrape the required powder in the powder storage cylinder into the working cylinder. Traditional SLS manufacturing processes have several disadvantages:

[0005] (1) During the process of screw extrusion powder feeding and powder spreading in the powder feeding system, a scraper or blade is required to scrape the raw material powder into the working cylinder, and the powder feeding and powder spreading processes take too much time, affecting the manufacturing efficiency.

[0006] (2) For the ceramic multi-material integrated additive manufacturing forming process, it means that the number of raw material powder storage cylinders may be more. The step of scraping the powder into the working cylinder is likely to cause the problem of mutual contamination between different raw material powders.

[0007] (3) After powder spreading by the scraper or blade, there will be residual powder on the working table surface, which is likely to cause waste and contamination of the powder cylinder, and the working stroke of the powder suction system is relatively long.

[0008] (4) Due to the presence of the scraper or blade mechanism in the powder feeding system, the powder feeding and spreading processes must have a certain fluidity and good loose density. Therefore, there are certain requirements for the shape and average particle size of the powder. Generally, it is required that the powder presents a spherical structure, and the particle size cannot be too small. The average particle size is about 20μm - 70μm, and the particle size distribution is required to be narrow, resulting in a very long preparation time for the powder. On the other hand, due to the relatively large particle size of the ceramic powder and the use of a blade to spread the powder, the density of the powder bed laid is low, and the power requirement of the laser system is large, which affects the density and sintering forming effect of the ceramic green body.

[0009] In summary, there is an urgent need for a new ceramic multi-material integrated additive manufacturing forming system and method. Summary of the Invention

[0010] This application provides a ceramic multi-material integrated additive manufacturing forming system and method. Its technical purpose is to achieve precise powder spreading by the powder spreading mechanism of ceramic multi-material powder, improve the working efficiency of the powder spreading mechanism, and solve the pollution problem between ceramic multi-material powders.

[0011] The above technical purpose of this application is achieved through the following technical solutions:

[0012] This application discloses a ceramic multi-material integrated additive manufacturing forming system and method. The forming system includes a control system, a driving motor, a powder spreading mechanism, a powder guiding tube, a powder storage cylinder, a laser system, an air outlet, a powder pressing mechanism, a working cylinder, a substrate, a push rod, a slide rail, a ball screw, a support table, a secondary slide rail, and a powder suction system, etc.

[0013] In order to realize ceramic multi-material integrated additive manufacturing, the system includes multiple powder spreading mechanisms, multiple powder storage cylinders, multiple powder guiding tubes, multiple guide rails and other components. The control system numbers the powder spreading mechanisms and controls the corresponding numbered powder spreading mechanisms to spread powder according to the model parameters. After powder spreading, the control system controls the corresponding numbered powder spreading mechanisms to return to the initial position. The control system performs the next process according to the model parameters and repeats continuously, thereby realizing ceramic multi-material integrated additive manufacturing.

[0014] In the system, the substrate is located inside the working cylinder, at the bottom of the raw material powder, and is used to preheat the ceramic raw material powder on the workbench surface. The push rod is located at the bottom of the working cylinder and is used to drive the up and down displacement movement of the workbench surface.

[0015] In the system, the protective gas inlet is arranged on the outermost left side of the system, and the opening height is approximately the same as the horizontal working plane height of the working cylinder, protecting the laser sintering reaction to the greatest extent. The protective gas outlet is opened on the outermost top side of the system.

[0016] The working cylinder in the system can move back and forth and left and right within a plane. Among them, the working cylinder is installed on the support platform, the support platform is installed on the slide rail, and the driving motor drives the slide rail to move, driving the support platform to move back and forth horizontally. The working cylinder is driven by a ball screw to achieve the left and right horizontal movement of the working cylinder.

[0017] Each powder spreading mechanism includes components such as a powder guiding pipe joint, a powder bin, a polarization mechanism, a clamping plate, an openable and closable support plate, a vibrating sieve, and a camera. Among them, the vibrating sieve is provided with holes, and the holes are evenly distributed. The powder guiding pipe joint is connected to the powder guiding pipe, and the powder bin is connected for powder supply by a powder storage cylinder through the powder guiding pipe. The particle size of the ceramic raw material powder in the powder storage cylinder is less than or equal to 15 μm, and its external shape structure does not require a spherical structure.

[0018] The control system calculates the powder spreading dosage according to the model data information, controls the clamping plate to isolate the required raw material powder inside the powder bin, controls the openable and closable support plate to open, and pours all the raw material powder isolated by the support plate onto the upper surface of the vibrating sieve. The control system controls the openable and closable support plate to close, controls the clamping plate to recycle, the height of the raw material powder in the powder bin drops, and the powder storage cylinder supplies powder to the powder bin through the powder guiding pipe.

[0019] The control system controls the image sensor - camera to detect the real - time position of the working cylinder, performs the positioning of the powder spreading system and the working cylinder, controls the polarization mechanism to drive the vibrating sieve to vibrate, and the raw material powder on the vibrating sieve passes through the holes on the vibrating sieve and is spread onto the working cylinder, completing the local powder spreading of a "plane" area in the working cylinder. The control system detects the real - time position of the working cylinder according to the camera, moves the working cylinder to the specified position, and completes the next powder spreading process. This step is continuously repeated until all the powder spreading processes are finally completed.

[0020] Each powder spreading mechanism is connected to the powder storage cylinder through a powder guiding pipe, and each powder spreading mechanism has its own guide rail, which is connected to the main guide rail through a certain arc transition. The control system selects the required powder spreading mechanism to enter the guide rail according to the instruction, controls the powder spreading mechanism to move through the guide rail, and completes the powder spreading process.

[0021] After the powder spreading is completed, the control system controls the powder pressing mechanism and the working cylinder to move according to the instruction to complete the powder pressing process. Finally, the control system controls the working cylinder to move to the working area of the laser system to complete the single - layer laser additive manufacturing.

[0022] After the single - layer laser additive manufacturing is completed, the control system controls the powder suction system to move on the secondary guide rail, and after reaching the working cylinder, sucks away the excess powder in the working cylinder, and the control system controls the powder suction system to move back to the starting point on the secondary guide rail.

[0023] The system repeats the above steps to complete the next - layer laser additive manufacturing, and continuously repeats until the ceramic part is completed.

[0024] The beneficial effects of this application are as follows: The ceramic multi-material integrated additive manufacturing forming system and method described in this application change the traditional powder feeding and scraper powder spreading processes, achieve precise powder spreading of ceramic multi-materials, realize "surface" area powder spreading, improve the working efficiency of the powder spreading system, and solve the problem of pollution between ceramic multi-material powders. The raw material powder required by the powder spreading system has a significantly reduced particle size compared to the traditional powder spreading system, less than or equal to 15 μm, and does not require the external shape structure to be a spherical structure, reducing the difficulty of processing and treating the raw material powder, improving the powder bed density of the powder spreading, and enhancing the density and sintering forming effect of the ceramic green body. Description of the Drawings

[0025] Figure 1 Schematic diagram of the ceramic multi-material integrated additive manufacturing forming system according to an embodiment of this application;

[0026] Figure 2 Schematic diagram of the structure of the powder spreading mechanism according to an embodiment of this application;

[0027] Figure 3 Schematic diagram of the guide rail layout of the powder spreading mechanism according to an embodiment of this application;

[0028] Figure 4 Schematic diagram of the structure of the working cylinder arrangement according to an embodiment of this application

[0029] Figure 5 Schematic diagram of the motion control process of the powder spreading mechanism according to an embodiment of this application;

[0030] In the figure: 1 - driving motor, 2 - protective gas inlet, 3 - powder spreading mechanism, 4 - powder guiding tube, 5 - powder storage cylinder, 6 - laser system, 7 - air outlet, 8 - powder pressing mechanism, 9 - working cylinder, 10 - substrate, 11 - push rod, 12 - laser system working window, 13 - guide rail, 14 - slide rail, 15 - ball screw, 16 - support platform, 17 - auxiliary slide rail, 18 - powder suction system, 19 - main guide rail, 31 - camera, 32 - vibrating screen, 33 - openable support plate, 34 - clamping plate, 35 - polarization mechanism, 36 - powder bin, 37 - powder guiding tube joint. Detailed Embodiments

[0031] The technical solution of this application will be described in detail below with reference to the drawings.

[0032] As Figure 1 and Figure 4 shown, the ceramic multi-material integrated additive manufacturing forming system described in this application includes a control system, a driving motor 1, a powder spreading mechanism 3, a powder guiding tube 4, a powder storage cylinder 5, a laser system 6, an air outlet 7, a powder pressing mechanism 8, a working cylinder 9, a substrate 10, a push rod 11, a slide rail 14, a ball screw 15, a support platform 16, an auxiliary slide rail 17, and a powder suction system 18.

[0033] The powder storage cylinder 5, the laser system 6 and the air outlet 7 are all arranged on the outer side of the top of the system. The protective gas inlet 2 is arranged on the outermost left side of the system. The powder spreading mechanism 3, the powder guiding tube 4, the powder pressing mechanism 8, the working cylinder 9, the substrate 10, the push rod 11, the slide rail 14, the ball screw 15, the support table 16, the auxiliary slide rail 17 and the powder suction system 18 are all arranged inside the system. The control system controls the movement of the powder spreading mechanism 3, the powder pressing mechanism 8, the working cylinder 9 and the powder suction system 18. The control system controls the working cylinder 9 to move to the working area of the laser system 6.

[0034] When the powder suction system 18 sucks powder, the working cylinder 9 remains stationary.

[0035] The powder storage cylinder 5 is connected to the powder spreading mechanism 3 through the powder guiding tube 4. Both the powder spreading mechanism 3 and the powder pressing mechanism 8 are arranged above the working cylinder 9. A substrate 10 is arranged inside the working cylinder 9, and a push rod 11 is connected to the bottom of the working cylinder 9.

[0036] The support table 16 is installed on the slide rail 14, the working cylinder 9 is installed on the support table 16, the driving motor 1 is connected to the slide rail 14, and the working cylinder 9 is connected to the ball screw 15. The powder suction system 18 is connected to the auxiliary slide rail 17. The control system controls the movement of the ball screw 15 and the push rod 11.

[0037] As a specific embodiment, the opening height of the protective gas inlet 2 is approximately the same as the horizontal working height of the working cylinder 9, which can protect the laser sintering reaction to the greatest extent.

[0038] The working cylinder 9 of the system can accurately move to any position within the working area. Specifically, the working cylinder 9 is installed on the support table 16, and at the same time, the support table 16 is installed on the slide rail 14. The control system controls the driving motor 1 to drive the slide rail 14 to move, driving the support table 16 to move back and forth horizontally. The working cylinder 9 is driven by the ball screw 15 to achieve the left and right horizontal movement of the working cylinder 9. There is a push rod 11 at the lower part of the working cylinder 9, and the control system pushes the push rod 11 to drive the substrate 10 to move up and down.

[0039] The system includes multiple powder spreading mechanisms 3, at least two powder spreading mechanisms 3. The number of the powder guiding tubes 4 and the powder storage cylinders 5 is the same as that of the powder spreading mechanisms 3. Each powder spreading mechanism 3 is connected to the corresponding powder storage cylinder 5 through the powder guiding tube 4. As Figure 2As shown, each powder spreading mechanism 3 includes a vibrating sieve 32, a polarization mechanism 35 and a powder bin 36. Cameras 31 are provided on both sides of the bottom of the powder spreading mechanism (3). The vibrating sieve 32 is arranged at the bottom of the powder spreading mechanism 3, and above the vibrating sieve 32 is the powder bin 36. From top to bottom, the bottom of the powder bin 36 is successively provided with clamping plates 34 and an openable and closable support plate 33. At the top of the powder bin 36 is provided a powder guiding pipe joint 37, and the powder guiding pipe joint 37 is connected to the powder guiding pipe 4. The powder bin 36 is connected to the powder storage cylinder 5 through the powder guiding pipe 4; the polarization mechanism 35 is arranged on both sides of the powder bin 36, the top of the polarization mechanism 35 is connected to the top of the powder spreading mechanism 3, and the bottom is respectively connected to both ends of the vibrating sieve 32. The powder spreading process of the powder spreading mechanism is as Figure 5 shown.

[0040] The control system is connected to the camera 31, the polarization mechanism 35, the openable and closable support plate 33 and the clamping plate 34.

[0041] As Figure 3 shown, each powder spreading mechanism 3 has its own guide rail 13, which is connected to the main guide rail 19 through a certain arc transition. The control system selects the required powder spreading mechanism 3 to enter the guide rail 13 according to the instruction, and controls the powder spreading mechanism 3 to move to the main guide rail 19 through the guide rail 13 to spread powder to the working cylinder 9, completing the powder spreading process.

[0042] The ceramic multi-material integrated additive manufacturing method described in this application includes:

[0043] S1: Input the three-dimensional digital model information into the forming system.

[0044] S2: The control system selects the powder spreading mechanism 3 with the corresponding number according to the three-dimensional digital model information.

[0045] S3: The control system receives the data information of the image sensor - camera 31, and the control system controls the selected powder spreading mechanism 3 to move from the guide rail 13 to the target position.

[0046] S4: The control system receives the data information of the image sensor - camera 31, and the control system controls the driving motor 1 to move the support table 16 on the slide rail 14 to the designated position.

[0047] S5: The control system receives the data information of the image sensor - camera 31, and the control system drives the ball screw 15 to move the working cylinder 9 to the designated position.

[0048] S6: The control system calculates the powder spreading amount for this time according to the three-dimensional digital model information, and controls the clamping plate 34 to close at a certain height. In this way, the powder in the space between the clamping plate 34 and the bottom openable and closable support plate 33 is the raw material powder amount for this powder spreading. Precise powder spreading can be achieved by calculating the powder spreading amount.

[0049] S7: The control system controls the openable support plate 33 to open, and all the raw material powder is poured out onto the vibrating sieve 32.

[0050] S8: The control system controls the polarization mechanism 35 to work, driving the vibrating sieve 32 to vibrate. The raw material powder on the vibrating sieve 32 is spread onto the working cylinder 9 through the holes on the vibrating sieve 32, completing the powder spreading in the "surface" area.

[0051] S9: After the powder spreading process in the "surface" area for one time is completed, the control system controls the openable support plate 33 to close.

[0052] S10: The control system controls the clamping plate 34 to retract, the height of the raw material powder in the powder bin 36 decreases, and the powder storage cylinder 5 supplies powder to the powder bin 36 through the powder guiding pipe 4.

[0053] S11: The control system determines whether the entire powder spreading process of the current raw material powder is completed. If not, the control system returns to step S3 and repeats steps S3 to S11 to complete the next powder spreading process until the powder spreading in the "surface" area of the current raw material powder usage is completed; if so, the control system controls the powder spreading mechanism 3 with this number to return to the initial position.

[0054] S12: After the powder spreading in the "surface" area for one time is completed, the control system controls the movement of the powder pressing mechanism 8 and the working cylinder 9 according to the instruction to complete the powder pressing process.

[0055] S13: The control system controls the working cylinder 9 to move to the working area of the laser system 6 to complete one layer of laser additive manufacturing.

[0056] S14: After one layer of laser additive manufacturing is completed, the control system controls the powder suction system 18 to move on the secondary slide rail 17. After the powder suction system 18 reaches the working cylinder 9, it sucks away the excess powder in the working cylinder 9. The control system controls the powder suction system 18 to move on the secondary slide rail 17 to return it to the starting point.

[0057] Specifically, the powder suction system 18 of the system is used to suck away the excess powder in the working cylinder 9 after each layer of laser sintering process in the working cylinder 9, facilitating the laying of the next layer of ceramic powder and completing the laser sintering. The powder suction system 18 is installed on the secondary slide rail 17. After each layer of laser sintering is completed, the working cylinder 9 remains stationary. The control system drives the powder suction system 18 to move along the secondary slide rail 17. After reaching the specified position, the control system controls the powder suction system 18 to complete the powder suction. After the powder suction process is completed, the control system drives the powder suction system 18 to return to the initial position along the secondary slide rail 17.

[0058] S15: The system repeats steps S2 to S14 to complete the next layer of laser additive manufacturing until the ceramic part is finally completed.

[0059] The above are exemplary embodiments of the present application, and the protection scope of the present application is defined by the claims and their equivalents.

Claims

1. A ceramic multi-material integrated additive manufacturing forming system, characterized in that It includes a control system, a driving motor (1), a powder spreading mechanism (3), a powder guiding tube (4), a powder storage cylinder (5), a laser system (6), an air outlet (7), a powder pressing mechanism (8), a working cylinder (9), a substrate (10), a push rod (11), a slide rail (14), a ball screw (15), a support table (16), a secondary slide rail (17) and a powder suction system (18); The powder storage cylinder (5), the laser system (6) and the air outlet (7) are all arranged on the outer side of the top of the system, the protective gas inlet (2) is arranged on the outermost left side of the system, and the powder spreading mechanism (3), the powder guiding tube (4), the powder pressing mechanism (8), the working cylinder (9), the substrate (10), the push rod (11), the slide rail (14), the ball screw (15), the support table (16), the secondary slide rail (17) and the powder suction system (18) are all arranged inside the system; the control system controls the movement of the powder spreading mechanism (3), the powder pressing mechanism (8), the working cylinder (9) and the powder suction system (18); the control system controls the working cylinder (9) to move to the working area of the laser system (6); The powder storage cylinder (5) is connected to the powder spreading mechanism (3) through the powder guiding tube (4), and both the powder spreading mechanism (3) and the powder pressing mechanism (8) are arranged above the working cylinder (9); a substrate (10) is arranged inside the working cylinder (9), and a push rod (11) is connected to the bottom of the working cylinder (9); The support table (16) is installed on the slide rail (14), the working cylinder (9) is installed on the support table (16), the driving motor (1) is connected to the slide rail (14), and the working cylinder (9) is connected to the ball screw (15); the powder suction system (18) is connected to the secondary slide rail (17); the control system controls the movement of the ball screw (15) and the push rod (11); Among them, the powder spreading mechanism (3) includes a vibrating sieve (32), a polarization mechanism (35) and a powder bin (36). Cameras (31) are arranged on both sides of the bottom of the powder spreading mechanism (3). The vibrating sieve (32) is arranged at the bottom of the powder spreading mechanism (3), the powder bin (36) is above the vibrating sieve (32), clamping plates (34) and an openable support plate (33) are successively arranged from top to bottom at the bottom of the powder bin (36), a powder guiding tube joint (37) is arranged at the top of the powder bin (36), the powder guiding tube joint (37) is connected to the powder guiding tube (4), and the powder bin (36) is connected to the powder storage cylinder (5) through the powder guiding tube (4); the polarization mechanism (35) is arranged on both sides of the powder bin (36), the top of the polarization mechanism (35) is connected to the top of the powder spreading mechanism (3), and the bottom is respectively connected to both ends of the vibrating sieve (32); the control system is connected to the cameras (31), the polarization mechanism (35), the openable support plate (33) and the clamping plates (34).

2. The system according to claim 1, wherein Each powder spreading mechanism (3) moves through its respective guide rail (13), and the guide rail (13) is connected to a main guide rail (19). The powder spreading mechanism (3) for powder spreading moves from the guide rail (13) to the main guide rail (19) to spread powder to the working cylinder (9).

3. The system according to claim 2, wherein A laser system working window (12) is arranged on the main guide rail (19), and the laser system (6) enters the working cylinder (9) through the laser system working window (12) for laser additive manufacturing.

4. The system according to claim 1, wherein The vibrating sieve (32) is provided with evenly distributed holes.

5. The system according to claim 1, wherein There are at least 2 powder spreading mechanisms (3), and the number of powder guiding pipes (4) and powder storage cylinders (5) is the same as that of the powder spreading mechanisms (3). Each powder spreading mechanism (3) is connected to the corresponding powder storage cylinder (5) through a powder guiding pipe (4).

6. The system according to claim 1, characterized in that The opening height of the protective gas inlet (2) is the same as the horizontal working height of the working cylinder (9).

7. A forming method for integrated additive manufacturing of ceramic multi-materials, characterized in that, It includes: S1: Input the three-dimensional digital model information into the forming system; S2: The control system selects the powder spreading mechanism (3) with the corresponding number according to the three-dimensional digital model information; S3: After the control system receives the data information of the image sensor - camera (31), it controls the selected powder spreading mechanism (3) to move from the guide rail (13) to the target position; S4: After the control system receives the data information of the image sensor - camera (31), it controls the driving motor (1) to drive the support table (16) to move on the slide rail (14) to reach the specified position; S5: The control system receives the data information of the image sensor - camera (31), and the control system drives the ball screw (15) to move the working cylinder (9) to the specified position; S6: The control system calculates the powder spreading amount for this time according to the three-dimensional digital model information, and controls the clamping plate (34) to close at a certain height. Then the powder in the space between the clamping plate (34) and the bottom opening and closing support plate (33) is the raw material powder amount for this powder spreading; S7: The control system controls the opening and closing support plate (33) to open, and the raw material powder is all poured out onto the vibrating sieve (32); S8: The control system controls the polarization mechanism (35) to work, drives the vibrating sieve (32) to vibrate, and the raw material powder on the vibrating sieve (32) is spread onto the working cylinder (9) through the holes on the vibrating sieve (32) to complete the powder spreading in the "surface" area; S9: After the powder spreading process in the "surface" area for one time is completed, the control system controls the opening and closing support plate (33) to close; S10: The control system controls the clamping plate (34) to open, the height of the raw material powder in the powder bin (36) drops, and the powder storage cylinder (5) supplies powder to the powder bin (36) through the powder guiding pipe (4); S11: The control system judges whether the entire powder spreading process of the raw material powder for this time is completed. If not, the control system returns to step S3 and re - executes steps S3 to S11 to complete the next powder spreading process until the powder spreading in the "surface" area of the raw material powder amount for this time is completed. If so, the control system controls the powder spreading mechanism (3) with this number to return to the initial position; S12: After the powder spreading in the "surface" area for one time is completed, the control system controls the movement of the powder pressing mechanism (8) and the working cylinder (9) according to the instruction to complete the powder pressing process; S13: The control system controls the working cylinder (9) to move to the working area of the laser system (6) to complete one - layer laser additive manufacturing; S14: After one - layer laser additive manufacturing is completed, the control system controls the powder suction system (18) to move on the auxiliary slide rail (17). After the powder suction system (18) reaches the working cylinder (9), it sucks away the excess powder in the working cylinder (9), and the control system controls the powder suction system (18) to move on the auxiliary slide rail (17) to return to the starting point; S15: The system repeats steps S2 to S14 to complete the next layer of laser additive manufacturing until the ceramic part is finally completed.

8. The method according to claim 7, wherein The particle size of the raw material powder is less than or equal to 15 μm, and the external structure of the raw material powder is any structure.

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