Large-size ultra-high-speed powder bed additive manufacturing equipment and method

Abstract

The invention relates to large-size ultra-high-speed powder bed additive manufacturing equipment and method. The equipment comprises a rack and a forming system. The forming system is fixedly connected with the rack and comprises a forming cavity, a translation device and a forming device, a printing platform is arranged in the forming cavity, the translation device is fixedly connected with the forming cavity, the forming device is connected with the translation device, and the forming device comprises an optical module, a powder laying module and an energy field auxiliary module. The optical module, the powder spreading module and the energy field auxiliary module are connected to the lower portion of the translation device, the optical module is arranged above the energy field auxiliary module, the optical module is provided with an ultrafast laser and a single-axis rotating mirror, high-speed rotation of the single-axis rotating mirror is combined with high-frequency selective on / off of pulse laser emitted by the ultrafast laser, and the single-axis rotating mirror is matched with the energy field auxiliary module; and the linear light spots translate to finish surface forming. According to the invention, the efficiency and precision of equipment in the forming process of large-size parts can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing technology, and in particular to a large-scale ultra-high-speed powder bed additive manufacturing device and method. Background Art

[0002] Additive manufacturing technology has been widely used in many fields in recent years, including aerospace, automobile manufacturing, medical equipment and metal processing. Compared with traditional manufacturing methods, additive manufacturing technology has higher flexibility and complex shape manufacturing capabilities, can achieve accurate construction of complex geometric shapes, and save materials and processing time, especially in small batch and customized production.

[0003] In the manufacturing process of large-sized parts, the existing powder bed additive manufacturing equipment often encounters problems such as thermal stress accumulation and uneven molding due to the complex process of material melting and solidification, which affects the quality and dimensional accuracy of the finished product. In addition, the optical system and powder delivery system in the existing equipment mostly adopt a separate design and lack efficient integration, resulting in a large size, complex structure, and inconvenient operation and maintenance. Therefore, it is necessary to design a large-scale ultra-high-speed powder bed additive manufacturing equipment and method to improve the performance of powder bed additive manufacturing equipment in large-scale, high-speed forming. Summary of the invention

[0004] In view of the problems existing in the prior art, the first object of the present invention is to provide a large-scale ultra-high-speed powder bed additive manufacturing equipment, simplify the equipment structure, and improve the convenience of operation and maintainability; The second purpose of the present invention is to provide a large-scale ultra-high-speed powder bed additive manufacturing method, which can effectively improve the forming capability of large-scale parts additive manufacturing, improve the forming speed and accuracy, and optimize production efficiency; at the same time, optimize powder transportation and uniform spreading to improve material utilization.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A large-scale ultra-high-speed powder bed additive manufacturing device, comprising a frame and a forming system; The forming system is fixedly connected to the frame, and the forming system includes a forming chamber, a translation device and a forming device. A printing platform is arranged in the forming chamber, and the translation device is fixedly connected to the forming chamber, and the translation device is used to drive the forming device to move laterally; The forming device is connected to the translation device, and the forming device includes an optical module, a powder spreading module and an energy field auxiliary module. The optical module, the powder spreading module and the energy field auxiliary module are connected below the translation device, and the optical module is arranged above the energy field auxiliary module. The optical module is provided with an ultrafast laser and a single-axis rotating mirror, and the powder spreading module is arranged on both sides of the energy field auxiliary module; the powder spreading module makes the powder evenly spread on the printing platform, and forms a line spot of a specific shape through high-speed rotation of the single-axis rotating mirror and high-frequency selective on / off of the pulsed laser emitted by the ultrafast laser in cooperation with the energy field auxiliary module, and the line spot is translated to complete the surface forming; when the forming material is metal powder, the energy field auxiliary module is an air duct used to remove metal splashes; when the forming material is ceramic powder, the energy field auxiliary module is a heating tube used to preheat and slowly cool the ceramic powder bed, thereby reducing the risk of cracking.

[0006] Furthermore, a frame platform is provided on the top of the frame, the forming chamber is fixedly installed on the frame platform, the frame platform is provided with a through hole, the size of the through hole is the same as that of the printing platform, and the frame platform and the printing platform are combined to form a printing plane.

[0007] Furthermore, the translation device includes a fixed frame, a translation motor, a nut seat, a guide rail, a guide rail slider, a synchronous pulley, a synchronous belt, a screw, a bearing and an adapter block. The fixed frame is installed on one side of the forming chamber, the translation motor is fixedly installed in the fixed frame, a screw is provided at the bottom of the translation motor, the motor shaft of the translation motor and one end of the screw are both provided with synchronous pulleys, the two synchronous pulleys are connected through a synchronous belt transmission, the other end of the screw is connected to the nut seat through a bearing, the nut seat is connected to the fixed frame, a guide rail slider is provided on the screw, a adapter block is provided on one side of the guide rail slider, a guide rail is provided below the guide rail slider, and the guide rail slider slides on the guide rail along the extension direction of the screw.

[0008] Furthermore, the powder laying module is provided with a mounting plate, the top of the mounting plate is fixedly connected to the adapter block, and the bottom of the mounting plate is respectively connected to the optical module and the energy field auxiliary module.

[0009] Furthermore, the powder laying module includes a powder storage trough, a powder storage tank, a coupling, a flipping motor, an upper bracket of the scraper bar, a lower bracket of the scraper bar, a scraper bar clamping plate and a scraper bar. The powder storage trough, the upper bracket of the scraper bar and the lower bracket of the scraper bar are symmetrically arranged on both sides of the energy field auxiliary module, the upper bracket of the scraper bar is fixedly connected to the mounting plate, the lower bracket of the scraper bar is arranged below the upper bracket of the scraper bar, the scraper bar clamping plate is fixedly connected to the lower bracket of the scraper bar, and the scraper bar is installed on the scraper bar clamping plate; two flipping motors are arranged above the upper bracket of the scraper bar, and the two motors are respectively connected to the powder storage trough through a coupling, and the powder storage tank is fixed in the forming chamber.

[0010] Furthermore, the optical module is also provided with a rotating mirror bracket, the rotating mirror bracket is fixedly connected to the mounting plate, the single-axis rotating mirror is connected to the rotating mirror bracket, the ultrafast laser is connected to the single-axis rotating mirror through an optical fiber, and the ultrafast laser is installed on the top of the forming chamber; the ultrafast laser emits a pulsed laser to the single-axis rotating mirror, the single-axis rotating mirror rotates at a high speed, and the reflection surface of the single-axis rotating mirror forms a laser line trajectory composed of high-frequency points.

[0011] Furthermore, air vents are provided on both sides of the energy field auxiliary module, one side of the air vents is used for air intake, and the other side of the air vents is used for air exhaust; the mounting plate is fixedly connected with an air vent bracket, and the air vent bracket is fixedly connected to the energy field auxiliary module.

[0012] Furthermore, the forming system is also provided with a forming cylinder and a push rod assembly, the top of the forming cylinder is connected to the frame platform, the push rod assembly is installed in the forming cylinder, the top of the push rod assembly is fixedly connected to the printing platform, and the push rod assembly is used to adjust the height of the printing platform.

[0013] Furthermore, the push rod assembly includes an electric push rod, an electric push rod adapter plate, a piston and a push rod motor. The electric push rod adapter plate is installed at the bottom of the forming cylinder. The electric push rod is arranged through the electric push rod adapter plate. The bottom of the electric push rod is connected to the push rod motor, the top of the electric push rod is connected to the piston, and the piston is connected to the printing platform.

[0014] Furthermore, the forming chamber is provided with an air inlet and an air outlet. When the forming material is metal powder, the air inlet is used to input inert gas to discharge oxygen in the forming chamber; the air outlet is used to discharge oxygen.

[0015] A large-scale ultra-high-speed powder bed additive manufacturing method, characterized in that: using the large-scale ultra-high-speed powder bed additive manufacturing equipment as described above, comprising the following steps: S1. Move the printing platform to the printing plane, and the translation device moves the forming device to the bottom of the powder storage tank so that the powder spreading module is filled with powder; S2, the translation device drives the forming device to move to the edge of the printing platform, and the powder spreading module rotates to make the powder fall below; S3. The translation device continues to move, and the powder spreading module spreads the powder evenly on the printing platform; S4. The translation device continues to move, and when the coated powder is under the energy field auxiliary module, the energy field auxiliary module and the optical module are started, and the optical module emits a pulsed laser to cooperate with the energy field auxiliary module to selectively melt and form the powder; S5. The translation device drives the forming device to continue to move, and keeps working together until the entire surface of the printing platform is printed; S6. The printing platform descends, the translation device moves in the opposite direction, and steps S1-S7 are repeated until the printing of the large-size sample is completed.

[0016] In general, the present invention has the following advantages: 1. Improve large-size forming capability and optimize production efficiency: The present invention significantly improves the forming capability of the equipment in additive manufacturing of large-size parts by optimizing the integrated design of the translation device, optical module, powder spreading module and energy field auxiliary module. Compared with traditional equipment, the present invention can more efficiently perform large-size and high-precision forming and improve overall production efficiency.

[0017] 2. Improve the forming speed and precision to meet the needs of efficient manufacturing: Combining ultrafast lasers and single-axis rotating mirrors, the present invention can significantly improve the laser scanning speed while ensuring the forming accuracy. This innovative design enables the equipment to maintain high precision during the ultra-high-speed forming process, thereby meeting the needs of modern manufacturing for efficient and large-size additive manufacturing, and is particularly suitable for industries with extremely high requirements for precision and efficiency.

[0018] 3. Optimize powder delivery and uniform spreading to improve material utilization: The present invention ensures uniform spreading of powder by coordinating the powder spreading module and the energy field auxiliary module to precisely control the powder delivery process. If metal powder is used, the two designed air vents form an air duct by blowing and sucking, which effectively removes the metal powder splashed during the forming process, avoids material waste and ensures the forming quality. If ceramic powder is used, heating strips are installed in front of the two air vents to preheat the ceramic powder in the printing area, which helps improve the powder fluidity and forming effect, and further optimizes the material utilization and printing quality.

[0019] 4. Simplify the equipment structure and improve the convenience of operation and maintainability: The present invention integrates key modules such as optical module, powder spreading module and energy field auxiliary module through modular design, which significantly simplifies the overall structure of the equipment. This design not only improves the integration and stability of the equipment, but also makes the operation of the equipment easier, reduces the complexity of maintenance and adjustment, reduces the labor intensity of operators, and improves the stability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the device of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the forming system.

[0022] Figure 3 It is a structural schematic diagram of the translation device.

[0023] Figure 4 It is a structural schematic diagram of the forming device.

[0024] Figure 5 is a schematic diagram of the working principle of the optical module.

[0025] In the figure: 1-frame; 2-forming system; 3-optical module; 4-translation device; 5-powder spreading module; 6-energy field auxiliary module; 201-forming chamber; 202-forming cylinder; 203-electric push rod; 204-electric push rod adapter plate; 205-piston; 206-printing platform; 207-air inlet; 208-air outlet; 301-ultrafast laser; 302-rotating mirror bracket; 303-single-axis rotating mirror; 401-flat Shift motor; 402-nut seat; 403-guide rail; 404-guide rail slider; 405-synchronous pulley; 406-synchronous belt; 407-screw rod; 408-bearing; 409-adapter block; 501-powder storage tank; 502-powder storage tank; 503-coupling; 504-flip motor; 505-scraper upper bracket; 506-scraper lower bracket; 507-scraper clamping plate; 508-scraper; 509-mounting plate. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below.

[0027] like Figure 1 As shown, a large-scale ultra-high-speed powder bed additive manufacturing device includes a frame 1 and a forming system 2; The forming system 2 is fixedly connected to the frame 1, and the forming system 2 includes a forming chamber 201, a translation device 4 and a forming device. A printing platform 206 is arranged in the forming chamber 201, and the translation device 4 is fixedly connected to the forming chamber 201. The translation device 4 is used to drive the forming device to move laterally to ensure that the laser beam of the forming device can cover the entire forming area. The forming device is connected to the translation device 4, and the forming device includes an optical module 3, a powder spreading module 5 and an energy field auxiliary module 6. The optical module 3, the powder spreading module 5 and the energy field auxiliary module 6 are connected to the bottom of the translation device 4, and the optical module 3 is arranged above the energy field auxiliary module 6. The optical module 3 is provided with an ultrafast laser 301 and a single-axis rotating mirror 303, and the powder spreading module 5 is arranged on both sides of the energy field auxiliary module 6; the powder spreading module 5 makes the powder evenly spread on the printing platform 206 to ensure the forming quality and stability of the printed part. Through the high-speed rotation of the single-axis rotating mirror 303 and the high-frequency selective on / off of the pulsed laser emitted by the ultrafast laser 301, in conjunction with the energy field auxiliary module 6, a line spot of a specific shape is formed, and the line spot is translated to complete the surface forming; when the forming material is metal powder, the energy field auxiliary module 6 is an air duct for removing metal splashes; when the forming material is ceramic powder, the energy field auxiliary module 6 is a heating tube for preheating and slow cooling of the ceramic powder bed, thereby reducing the risk of cracking.

[0028] A frame platform is provided on the top of the frame 1, and the forming chamber 201 is fixedly installed on the frame platform. A through hole is opened on the frame platform, and the size of the through hole is the same as that of the printing platform 206. The frame platform and the printing platform 206 are combined to form a printing plane.

[0029] like Figure 3 As shown, the translation device 4 includes a fixed frame, a translation motor 401, a nut seat 402, a guide rail 403, a guide rail slider 404, a synchronous pulley 405, a synchronous belt 406, a screw 407, a bearing 408 and an adapter block 409. The fixed frame is installed on one side of the forming chamber 201, and the translation motor 401 is fixedly installed in the fixed frame. The screw 407 is provided below the translation motor 401. The motor shaft of the translation motor 401 and one end of the screw 407 are both provided There is a synchronous pulley 405, and the two synchronous pulleys 405 are connected through a synchronous belt 406. The other end of the screw rod 407 is connected to the nut seat 402 through a bearing 408, and the nut seat 402 is connected to the fixed frame. A guide rail slider 404 is arranged on the screw rod 407, and a transfer block 409 is arranged on one side of the guide rail slider 404. A guide rail 403 is arranged below the guide rail slider 404, and the guide rail slider 404 slides on the guide rail 403 along the extension direction of the screw rod 407. The translation motor 401 drives the optical module 3 to translate through the cooperation of the nut seat 402 and the screw rod 407. The guide rail 403 and the guide rail slider 404 constitute the guiding system of the translation device 4, ensuring that the optical module 3 can maintain an accurate trajectory during the translation process to avoid deviation. The cooperation between the translation device 4 and the optical module 3 enables the adjustment and control of the laser scanning area to be completed efficiently, greatly improving the forming accuracy of the equipment, and supporting the requirements of large-size and ultra-high-speed additive manufacturing.

[0030] like Figure 4 As shown, the powder spreading module 5 is provided with a mounting plate 509, the top of the mounting plate 509 is fixedly connected to the adapter block 409, and the bottom of the mounting plate 509 is respectively connected to the optical module 3 and the energy field auxiliary module 6.

[0031] The powder spreading module 5 includes a powder storage tank 501, a powder storage tank 502, a coupling 503, a flipping motor 504, a scraper upper bracket 505, a scraper lower bracket 506, a scraper clamping plate 507 and a scraper 508. The powder storage tank 501, the scraper upper bracket 505 and the scraper lower bracket 506 are symmetrically arranged on both sides of the energy field auxiliary module 6, respectively. The scraper upper bracket 505 is fixedly connected to the mounting plate 509, the scraper lower bracket 506 is arranged below the scraper upper bracket 505, the scraper clamping plate 507 is fixedly connected to the scraper lower bracket 506, and the scraper 508 is installed on the scraper clamping plate 507; two flipping motors 504 are arranged above the scraper upper bracket 505, and the two flipping motors 504 are respectively connected to the powder storage tank 501 through the coupling 503, and the powder storage tank 502 is fixed in the forming chamber 201 for storing powder. The flip motor 504 drives the powder storage tank 501 to rotate and feed through the coupling 503, ensuring the continuity and stability of the powder supply; the scraper 508 slides along the surface of the printing platform 206 to evenly spread the powder to the forming area of ​​each layer; the design of the air outlet and the air outlet bracket enables the airflow of the energy field auxiliary module 6 to be evenly distributed, ensuring the smooth conduction of the airflow, effectively absorbing excess powder and preventing the powder from scattering in unnecessary areas; the combination of the powder spreading module 5, the energy field auxiliary module 6 and the optical module 3 ensures the uniform laying of the powder and the synchronization of the laser curing process, thereby improving the accuracy and stability of the equipment in large-scale, ultra-high-speed powder bed additive manufacturing.

[0032] like Figure 4 and Figure 5As shown, the optical module 3 is also provided with a rotating mirror bracket 302, and the ultrafast laser 301 is installed on the top of the forming chamber 201. The ultrafast laser 301 emits an ultrashort pulse laser beam, and its laser beam has an extremely high energy density, which can quickly melt and solidify the powder material in an extremely short time; the rotating mirror bracket 302 is fixedly connected to the mounting plate 509, and the single-axis rotating mirror 303 is connected to the rotating mirror bracket 302. The rotating mirror bracket 302 is used to fix and support the single-axis rotating mirror 303 to ensure the stability and accuracy of the single-axis rotating mirror 303; the ultrafast laser 301 is connected to the single-axis rotating mirror 303 through an optical fiber; the ultrafast laser 301 emits a pulsed laser to the single-axis rotating mirror 303, and the single-axis rotating mirror 303 rotates at a high speed, and the reflection surface of the single-axis rotating mirror 303 forms a laser line trajectory composed of high-frequency points. Because the single-axis rotating mirror 303 can reflect the laser beam at different angles, the single-axis rotating mirror 303 usually has multiple reflecting surfaces, which can quickly change the irradiation angle of the laser beam, thereby adjusting the accuracy and range of laser irradiation according to the forming requirements, and controlling the path of the laser beam by high-speed rotation, so that the laser beam can accurately scan in the forming area. To ensure the accuracy and stability of the scanning, the laser beam is translated by the translation device 4 during the scanning process, thereby covering the entire printing area. The cooperation between the optical module 3 and the translation device 4 enables the laser scanning path to be accurately and evenly laid on the powder layer, ensuring that the melting and solidification process of each layer of powder is accurate. Every detail in the laser scanning process can be effectively controlled to meet the needs of large-scale, high-precision additive manufacturing.

[0033] like Figure 4 As shown, air vents are provided on both sides of the energy field auxiliary module 6, one air vent is used for air intake, and the other air vent is used for air outlet; the mounting plate 509 is fixedly connected with an air vent bracket, and the air vent bracket is fixedly connected to the energy field auxiliary module 6. For metal powder, the two air vents in the energy field auxiliary module 6 adopt a design of one blowing and one sucking, and use the air flow to form an air duct to quickly absorb the metal powder splashing during the forming process, and avoid the powder flying to unnecessary areas, thereby improving the cleanliness of the forming area, reducing powder waste, and ensuring the uniform distribution of powder during the forming process. When using ceramic powder, the energy field auxiliary module 6 preheats the ceramic powder by adding a heating strip in front of the air vent. The heating strip can provide appropriate heat for the ceramic powder, improve the fluidity and spreadability of the powder, and thus enhance the forming effect of the ceramic powder. The preheating design ensures that the powder can be evenly distributed during the spreading process, and effectively avoids the problem of poor bonding or poor forming quality of the ceramic powder due to too low temperature during the forming process.

[0034] like Figure 2As shown, the forming system 2 is also provided with a forming cylinder 202 and a push rod assembly, the top of the forming cylinder 202 is connected to the frame platform, the push rod assembly is installed in the forming cylinder 202, the top of the push rod assembly is fixedly connected to the printing platform 206, and the push rod assembly is used to adjust the height of the printing platform 206. The push rod assembly includes an electric push rod 203, an electric push rod adapter plate 204, a piston 205 and a push rod motor, the electric push rod adapter plate 204 is installed at the bottom of the forming cylinder 202, the electric push rod 203 is arranged through the electric push rod adapter plate 204, the bottom of the electric push rod 203 is connected to the push rod motor, the top of the electric push rod 203 is connected to the piston 205, and the piston 205 is connected to the printing platform 206. Through the drive of the electric push rod 203, the up and down movement of the piston 205 can be realized in each layer printing process, and the stacking height of the powder can be accurately controlled.

[0035] The forming chamber 201 is provided with an air inlet 207 and an air outlet 208. When the forming material is metal powder, the air inlet 207 is used to input inert gas to discharge oxygen in the forming chamber 201; the air outlet 208 is used to discharge oxygen to ensure that the temperature and pressure during the forming process are controlled within an ideal range.

[0036] A large-scale ultra-high-speed powder bed additive manufacturing method, characterized in that: using the large-scale ultra-high-speed powder bed additive manufacturing equipment as described above, comprising the following steps: S1. The printing platform 206 is moved to the printing plane, and the translation device 4 moves the forming device to the bottom of the powder storage tank 502 so that the powder spreading module 5 is filled with powder; S2, the translation device 4 drives the forming device to move to the edge of the printing platform 206, and the powder spreading module 5 rotates to make the powder fall below; S3. The translation device 4 continues to move, and the powder spreading module 5 spreads the powder evenly on the printing platform 206; S4. The translation device 4 continues to move. When the coated powder is under the energy field auxiliary module 6, the energy field auxiliary module 6 and the optical module 3 are started. The optical module 3 emits a pulsed laser to cooperate with the energy field auxiliary module 6 to selectively melt and shape the powder. S5. The translation device 4 drives the forming device to continue to move, and keeps working together until the entire surface of the printing platform 206 is printed; S6. The printing platform 206 descends, the translation device 4 moves in the opposite direction, and steps S1-S7 are repeated until the printing of the large-size sample is completed.

[0037] Main functions of the present invention: The present invention can effectively improve the efficiency and accuracy of the equipment in the process of forming large-sized parts by introducing a highly integrated optical module 3, a powder spreading module 5 and an energy field auxiliary module 6, ensure the laser scanning accuracy and powder distribution uniformity, and greatly improve the forming speed and accuracy of the equipment. In addition, the combined application of the ultrafast laser 301 and the single-axis rotating mirror 303 significantly enhances the laser scanning speed, thereby meeting the needs of high-precision, large-size forming, and meeting the needs of modern additive manufacturing technology for efficient and precise equipment.

[0038] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A large-scale ultra-high-speed powder bed additive manufacturing device, characterized in that: Including rack and forming system; The forming system is fixedly connected to the frame, and the forming system includes a forming chamber, a translation device and a forming device. A printing platform is arranged in the forming chamber, and the translation device is fixedly connected to the forming chamber, and the translation device is used to drive the forming device to move laterally; The forming device is connected to the translation device, and the forming device includes an optical module, a powder spreading module and an energy field auxiliary module. The optical module, the powder spreading module and the energy field auxiliary module are connected below the translation device, and the optical module is arranged above the energy field auxiliary module. The optical module is provided with an ultrafast laser and a single-axis rotating mirror, and the powder spreading module is arranged on both sides of the energy field auxiliary module; the powder spreading module makes the powder evenly spread on the printing platform, and forms a line spot of a specific shape through high-speed rotation of the single-axis rotating mirror and high-frequency selective on / off of the pulsed laser emitted by the ultrafast laser in cooperation with the energy field auxiliary module, and the line spot is translated to complete the surface forming; when the forming material is metal powder, the energy field auxiliary module is an air duct used to remove metal splashes; when the forming material is ceramic powder, the energy field auxiliary module is a heating tube used for preheating and slow cooling of the ceramic powder bed.

2. A large-scale ultra-high-speed powder bed additive manufacturing device according to claim 1, characterized in that: A frame platform is provided on the top of the frame, and the forming chamber is fixedly installed on the frame platform. A through hole is opened on the frame platform, and the size of the through hole is the same as that of the printing platform. The frame platform and the printing platform are combined to form a printing plane.

3. A large-scale ultra-high-speed powder bed additive manufacturing device according to claim 2, characterized in that: The translation device includes a fixed frame, a translation motor, a nut seat, a guide rail, a guide rail slider, a synchronous pulley, a synchronous belt, a screw, a bearing and an adapter block. The fixed frame is installed on one side of the forming chamber, and the translation motor is fixedly installed in the fixed frame. A screw is provided at the bottom of the translation motor. The motor shaft of the translation motor and one end of the screw are both provided with synchronous pulleys. The two synchronous pulleys are connected through synchronous belt transmission. The other end of the screw is connected to the nut seat through a bearing, and the nut seat is connected to the fixed frame. A guide rail slider is provided on the screw, and an adapter block is provided on one side of the guide rail slider. A guide rail is provided below the guide rail slider, and the guide rail slider slides on the guide rail along the extension direction of the screw.

4. A large-scale ultra-high-speed powder bed additive manufacturing device according to claim 3, characterized in that: The powder spreading module is provided with a mounting plate, the top of the mounting plate is fixedly connected to the adapter block, and the bottom of the mounting plate is respectively connected to the optical module and the energy field auxiliary module.

5. A large-scale ultra-high-speed powder bed additive manufacturing device according to claim 4, characterized in that: The powder spreading module includes a powder storage trough, a powder storage tank, a coupling, a flipping motor, an upper scraper bracket, a lower scraper bracket, a scraper clamp and a scraper. The powder storage trough, the upper scraper bracket and the lower scraper bracket are symmetrically arranged on both sides of the energy field auxiliary module, the upper scraper bracket is fixedly connected to the mounting plate, the lower scraper bracket is arranged below the upper scraper bracket, the scraper clamp is fixedly connected to the lower scraper bracket, and the scraper is installed on the scraper clamp; two flipping motors are arranged above the upper scraper bracket, and the two motors are respectively connected to the powder storage trough through a coupling, and the powder storage tank is fixed in the forming chamber.

6. A large-scale ultra-high-speed powder bed additive manufacturing device according to claim 5, characterized in that: The optical module is also provided with a rotating mirror bracket, which is fixedly connected to the mounting plate, the single-axis rotating mirror is connected to the rotating mirror bracket, the ultrafast laser is connected to the single-axis rotating mirror through an optical fiber, and the ultrafast laser is installed on the top of the forming chamber; the ultrafast laser emits pulsed laser to the single-axis rotating mirror, the single-axis rotating mirror rotates at a high speed, and the reflection surface of the single-axis rotating mirror forms a laser line trajectory composed of high-frequency points.

7. The large-scale ultra-high-speed powder bed additive manufacturing equipment according to claim 2, characterized in that: The forming system is also provided with a forming cylinder and a push rod assembly. The top of the forming cylinder is connected to the frame platform. The push rod assembly is installed in the forming cylinder. The top of the push rod assembly is fixedly connected to the printing platform. The push rod assembly is used to adjust the height of the printing platform.

8. The large-scale ultra-high-speed powder bed additive manufacturing equipment according to claim 7, characterized in that: The push rod assembly includes an electric push rod, an electric push rod adapter plate, a piston and a push rod motor. The electric push rod adapter plate is installed at the bottom of the forming cylinder. The electric push rod is set through the electric push rod adapter plate. The bottom of the electric push rod is connected to the push rod motor, the top of the electric push rod is connected to the piston, and the piston is connected to the printing platform.

9. The large-scale ultra-high-speed powder bed additive manufacturing equipment according to claim 1, characterized in that: The forming chamber is provided with an air inlet and an air outlet. When the forming material is metal powder, the air inlet is used to input inert gas to exhaust oxygen in the forming chamber; the air outlet is used to exhaust oxygen.

10. A large-scale ultra-high-speed powder bed additive manufacturing method, characterized in that: The large-scale ultra-high-speed powder bed additive manufacturing device according to any one of claims 1 to 9 comprises the following steps: S1. Move the printing platform to the printing plane, and the translation device moves the forming device to the bottom of the powder storage tank so that the powder spreading module is filled with powder; S2, the translation device drives the forming device to move to the edge of the printing platform, and the powder spreading module rotates to make the powder fall below; S3. The translation device continues to move, and the powder spreading module spreads the powder evenly on the printing platform; S4. The translation device continues to move, and when the coated powder is under the energy field auxiliary module, the energy field auxiliary module and the optical module are started, and the optical module emits a pulsed laser to cooperate with the energy field auxiliary module to selectively melt and form the powder; S5. The translation device drives the forming device to continue to move, and keeps working together until the entire surface of the printing platform is printed; S6. The printing platform descends, the translation device moves in the opposite direction, and steps S1-S7 are repeated until the printing of the large-size sample is completed.

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