A laser selective melting forming device of a nanoparticle reinforced gradient material

Abstract

The utility model relates to additive manufacturing technology field especially relates to a kind of laser selective melting forming device of nano particle reinforced gradient material, including printing platform, and feeding device, powder storage circulation screening device and overflow powder recycling screening device are respectively provided on printing platform, and the side of printing platform is respectively provided with suction bin one, suction bin two, suction bin three and suction bin four, and the top of suction bin one is connected with air pump one by suction tube one, and suction bin two is connected with air pump two by suction tube two, and one side of suction bin four is provided with waste bin. The utility model is novel in structure, accurate measurement and mixing of different particles are achieved, nano reinforced gradient material printing can be realized, and automatic fine screening and recycling and recycling of unprinted powder and residual powder after printing are realized.

Description

Technical Field

[0001] This utility model relates to the field of additive manufacturing technology, specifically to a laser selective melting and forming device for nanoparticle-enhanced gradient materials. Background Technology

[0002] As the manufacturing industry accelerates towards high-end and precision manufacturing, selective laser melting (SLM) technology has become a key support for the additive manufacturing field. However, high-end industries such as aerospace, medical, and electronics have increasingly stringent requirements for component manufacturing, demanding not only complex and precise geometric configurations but also extremely high standards for the mechanical properties and reliability of materials. Traditional alloy materials commonly used in SLM technology are ill-equipped to withstand the challenges posed by extremely harsh environments.

[0003] By introducing suitable nanoparticle reinforcing materials and designing gradient structures, the strength, hardness, and stability of materials can be improved due to their unique size and surface effects. These technologies have been widely applied in other additive manufacturing technologies. Traditional laser selective melting (SLM) equipment uses a single powder feeding device, which can meet the forming needs of conventional metal components, but is limited by the single-component powder supply mode, making it difficult to print composite materials. Powder replenishment in traditional SLM equipment has long relied on manual operation. Due to the complex material system and different single-layer material ratios of nanoparticle-reinforced gradient materials, gradient control using manual powder feeding or pre-mixing is almost impossible. Furthermore, in terms of powder recycling, when the powder utilization rate of the printed parts is low, the subsequent recycling process is highly dependent on manual intervention, requiring sequential drying, sieving, and other steps. Due to the special requirements of nanoparticle-reinforced gradient materials, the powder storage chamber, printing chamber, and overflow chamber of SLM equipment contain complex particle size distributions and powder ratios. The lengthy operation process greatly limits the recycling and turnover efficiency of powder, making it difficult to meet the requirements of mass production in modern manufacturing.

[0004] Therefore, there is an urgent need to invent a laser selective melting forming device for nanoparticle-reinforced gradient materials to meet the requirements of laser selective melting additive manufacturing processes for complex parts, and to realize the automated feeding and recycling of nanoparticle-reinforced gradient materials. Utility Model Content

[0005] To address the problems in related technologies, this utility model proposes a laser selective melting and forming device for nanoparticle-reinforced gradient materials, overcoming the aforementioned technical issues in existing related technologies. The purpose of this utility model is to solve the defects of existing laser selective melting and forming devices, such as the mismatch between manufacturing technology and specialized needs, and the high dependence of recycling on manual labor. It achieves precise measurement and mixing of different particles, enabling the printing of nanoparticle-reinforced gradient materials, and realizing automated fine screening and recycling of unprinted powder and residual powder after printing. The application of nanoparticle printing technology can better meet the actual needs of industrial production.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a laser selective melting and forming device for nanoparticle-enhanced gradient materials, comprising a printing platform, wherein a feeding device, a powder storage and circulation screening device, and an overflow powder recovery screening device are respectively arranged on the printing platform; a first suction chamber, a second suction chamber, a third suction chamber, and a fourth suction chamber are respectively arranged on one side of the printing platform; the first suction chamber is connected to the fourth suction chamber through a connecting pipe; the second suction chamber is connected to the third suction chamber through a connecting pipe; the top of the first suction chamber is connected to an air pump through a suction pipe; the second suction chamber is connected to an air pump through a suction pipe; the first air pump is connected to a feeding device through a feeding pipe; the second air pump is connected to a feeding device through a feeding pipe; and a waste bin is arranged on one side of the fourth suction chamber.

[0007] Preferably, the feeding device includes a feeding mechanism and a mixing mechanism. The feeding mechanism includes a first motor and a second motor. The first motor is connected to a first rotating shaft via a first coupling, and the second motor is connected to a second rotating shaft via a second coupling. A first feeding tank is disposed at the bottom of the first rotating shaft, and a first feeding turntable is disposed at the bottom of the first feeding tank. One end of the bottom of the first rotating shaft passes through the first feeding tank and extends to the bottom of the first feeding tank, and the other end is fixedly connected to the first feeding turntable. The first feeding tank is movably connected to both the first rotating shaft and the first feeding turntable. A second feeding tank is disposed at the bottom of the second rotating shaft, and a second feeding turntable is disposed at the bottom of the second feeding tank. One bottom end of the second rotating shaft passes through the second feeding tank and extends to the bottom of the second feeding tank, and its end is fixedly connected to the second feeding turntable. The second feeding tank is movably connected to the second rotating shaft and the second feeding turntable. The mixing mechanism includes a third motor and a mixing chamber. The third motor is mounted on the mixing chamber. The third motor is connected to the third rotating shaft and the third discharging turntable via a third coupling. The first and second feeding turntables are respectively mounted on the top sides of the mixing chamber. One bottom end of the third rotating shaft passes through the mixing chamber and extends to the bottom of the mixing chamber, and its end is fixedly connected to the third discharging turntable. The mixing chamber is movably connected to the third rotating shaft and the third discharging turntable.

[0008] Preferably, the printing platform includes a powder storage chamber, a printing chamber, a powder overflow chamber, an electrically retractable discharge plate one, an electrically retractable discharge plate two, a secondary lifting rod, a main lifting rod, a bidirectional scraper, a recovery chamber, and an electrically retractable discharge plate three. The powder storage chamber and the powder overflow chamber are located on opposite sides of the printing chamber. The electrically retractable discharge plate two is located at the bottom of the powder overflow chamber, the main lifting rod is located at the bottom of the printing chamber, the electrically retractable discharge plate one is located at the bottom of the powder storage chamber, four secondary lifting rods are provided, and they are located around the bottom of the electrically retractable discharge plate one. The recovery chamber is located on the left side of the powder storage chamber, the bidirectional scraper is located above the powder storage chamber, and the electrically retractable discharge plate three is located at the bottom of the recovery chamber.

[0009] Preferably, the powder storage and circulating screening device includes a receiving funnel and a diameter converter. The receiving funnel is located on top of the diameter converter. A material box and a material box are sequentially arranged at the bottom of the diameter converter. The material box and the material box are connected by a mesh frame. The material box is connected to the suction chamber through a discharge pipe. The material box is connected to the suction chamber through a discharge pipe. An electric butterfly valve is installed on the discharge pipe. An electric butterfly valve is installed on the discharge pipe. A vibration base is installed at the bottom of the material box.

[0010] Preferably, the overflow powder recovery screening device includes a receiving funnel two and a diameter converter two. The receiving funnel two is located on top of the diameter converter two. Material boxes three, four, and five are sequentially arranged at the bottom of the diameter converter two. Material boxes three and four are connected by a mesh frame two. Material boxes four and five are connected by a mesh frame three. Material box three is connected to a waste bin through a discharge pipe three. An electric butterfly valve three is installed on the discharge pipe three. Material box four is connected to a suction bin four through a discharge pipe four. An electric butterfly valve four is installed on the discharge pipe four. Material box five is connected to a suction bin three through a discharge pipe five. An electric butterfly valve five is installed on the discharge pipe five. A vibration base two is installed at the bottom of material box five.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) This utility model is a laser selective melting and forming device for nanoparticle-reinforced gradient materials, which effectively overcomes the printing problem of single material and single particle ratio. With the help of programmable gradient feeding device, the content of nano-reinforced phase is controlled in real time with high precision dual independent discharge port. Gradient powder spreading with different particle composition ratios is achieved in the printing stroke, and nano-reinforced gradient material printing is completed. This achieves flexible adjustment of material performance distribution and improves the service performance of parts in complex environments.

[0013] (2) This utility model is a laser selective melting and forming device for nanoparticle-reinforced gradient materials. In order to realize the automation of the powder preparation and circulation process of nanoparticle-reinforced materials, the unused particles in the powder storage chamber of the printing platform are automatically sucked in by the powder storage circulation screening device. After being screened by different particle sizes, they are immediately returned to the feeding device through a closed pipeline; forming a fully closed-loop automated process. This process greatly reduces manual intervention, reduces the complexity of operation and the probability of error, and significantly improves production efficiency and process stability.

[0014] (3) This utility model is a laser selective melting forming device for nanoparticle-enhanced gradient materials. After printing, excess powder is collected again into the overflow powder recovery screening device. The waste and reusable particles are screened with high precision, and the reusable powder is fed back into the feeding device to implement high utilization rate recycling and reuse. This process not only significantly reduces raw material consumption and production costs, but also injects sustainable development momentum into laser selective melting technology by relying on the efficient recycling of powder resources. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the feeding device of this utility model;

[0017] Figure 3 This is a schematic diagram of the printing platform of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the powder storage and circulating screening device of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the overflow powder recovery screening device of this utility model.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Feeding device; 101. Motor 1; 102. Coupling 1; 103. Rotating shaft 1; 104. Feeding tank 1; 105. Feeding turntable 1; 106. Discharge turntable 3; 107. Mixing chamber; 108. Rotating shaft 3; 109. Coupling 3; 110. Feeding turntable 2; 111. Motor 3; 112. Feeding tank 2; 113. Rotating shaft 2; 114. Coupling 2; 115. Motor 2; 2. Printing platform; 201. 202. Powder storage chamber; 203. Electric telescopic discharge plate 1; 204. Auxiliary lifting rod; 205. Main lifting rod; 206. Electric telescopic discharge plate 2; 207. Overflow chamber; 208. Printing chamber; 209. Bidirectional scraper; 210. Recycling chamber; 210. Electric telescopic discharge plate 3; 3. Powder storage and circulating screening device; 301. Receiving funnel 1; 302. Diameter converter 1; 303. Material box 1; 304. Wire mesh frame 1; 305. Vibrating base 1. Material receiving pipe 1; 306. Material discharge pipe 2; 307. Electric butterfly valve 1; 308. Material discharge pipe 1; 309. Electric butterfly valve 2; 310. Material box 2; 4. Air pump 1; 5. Air pump 2; 6. Suction pipe 1; 7. Suction pipe 2; 8. Suction bin 1; 9. Suction bin 2; 10. Connecting pipe 1; 11. Connecting pipe 2; 12. Suction bin 3; 13. Suction bin 4; 14. Waste bin; 15. Overflow powder recovery screening device; 1501. Material receiving funnel II; 1502, Diameter Converter II; 1503, Material Box III; 1504, Mesh Frame II; 1505, Electric Butterfly Valve IV; 1506, Electric Butterfly Valve V; 1507, Drop Pipe IV; 1508, Drop Pipe V; 1509, Vibration Base II; 1510, Material Box V; 1511, Drop Pipe III; 1512, Mesh Frame III; 1513, Electric Butterfly Valve III; 1514, Material Box IV; 16, Feeding Pipe II; 17, Feeding Pipe I. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example

[0023] Please see Figure 1-5This invention proposes a technical solution for a laser selective melting and forming device for nanoparticle-enhanced gradient materials: A laser selective melting and forming device for nanoparticle-enhanced gradient materials includes a printing platform 2. The printing platform 2 is respectively equipped with a feeding device 1, a powder storage and circulation screening device 3, and an overflow powder recovery screening device 15. On one side of the printing platform 2, there are suction bins 1-8, 2-9, 3-12, and 4-13. Suction bin 1-8 is connected to suction bin 4-13 through a connecting pipe 10. Suction bin 2-9 is connected to suction bin 3-12 through a connecting pipe 2-11. The top of suction bin 1-8 is connected to an air pump 4 through a suction pipe 6. Suction bin 2-9 is connected to an air pump 5 through a suction pipe 2-7. Air pump 4 is connected to the feeding device 1 through a feeding pipe 17. Air pump 5 is connected to the feeding device 1 through a feeding pipe 2-16. A waste bin 14 is provided on one side of suction bin 4-13.

[0024] In this embodiment, the feeding device 1 is fixed on the top left side of the printing platform 2, the powder storage and circulation screening device 3 is fixed on the bottom left side of the printing platform 2, and the overflow powder recovery screening device 15 is fixed on the bottom right side of the printing platform 2; the particles in the suction bin 8 can be transported to the feeding tank 104 by the air pump 1, and the particles in the suction bin 9 can be transported to the feeding tank 112 by the air pump 2.

[0025] Please see Figure 1 and Figure 2As shown, the feeding device 1 further includes a feeding mechanism and a mixing mechanism. The feeding mechanism includes a motor 101 and a motor 115. Motor 101 is connected to a rotating shaft 103 via a coupling 102. Motor 115 is connected to a rotating shaft 113 via a coupling 114. A feeding tank 104 is provided at the bottom of the rotating shaft 103, and a feeding turntable 105 is provided at the bottom of the feeding tank 104. One end of the bottom of the rotating shaft 103 passes through the feeding tank 104 and extends to the bottom of the feeding tank 104, and the end is fixedly connected to the feeding turntable 105. The feeding tank 104 is movably connected to the rotating shaft 103 and the feeding turntable 105 respectively. A feeding tank 112 is provided at the bottom of the rotating shaft 113, and a feeding turntable 110 is provided at the bottom of the feeding tank 112. One end of the bottom of 113 passes through the second feeding tank 112 and extends to the bottom of the second feeding tank 112, and the end is fixedly connected to the second feeding turntable 110. The second feeding tank 112 is movably connected to the second rotating shaft 113 and the second feeding turntable 110 respectively. The mixing mechanism includes a third motor 111 and a mixing chamber 107. The third motor 111 is set on the mixing chamber 107. The third motor 111 is connected to the third rotating shaft 108 and the third discharge turntable 106 through the third coupling 109. The first feeding turntable 105 and the second feeding turntable 110 are respectively set on the top two sides of the mixing chamber 107. One end of the bottom of the third rotating shaft 108 passes through the mixing chamber 107 and extends to the bottom of the mixing chamber 107, and the end is fixedly connected to the third discharge turntable 106. The mixing chamber 107 is movably connected to the third rotating shaft 108 and the third discharge turntable 106 respectively.

[0026] In this embodiment, starting motor 101 drives rotating shaft 103 connected by coupling 102 to rotate. Rotating shaft 103 is connected to feeding turntable 105 on feeding tank 104, so that rotating shaft 103 drives the connected feeding turntable 105 to rotate when rotating. The feeding ratio in feeding tank 104 is achieved by adjusting the rotation speed. Starting motor 115 drives rotating shaft 113 connected by coupling 114 to rotate. Rotating shaft 113 is connected to feeding tank 104. The feeding turntable 2110 on the 2nd is connected, so that when the rotating shaft 213 rotates, it drives the connected feeding turntable 2110 to rotate. The feeding ratio in the feeding tank 212 is realized by adjusting the speed. By starting the motor 3111, the rotating shaft 3108 connected by the coupling 3109 is driven to rotate. Since the rotating shaft 3108 is connected to the discharge turntable 3106 on the mixing chamber 107, the rotating shaft 3108 drives the discharge turntable 3106 to rotate, so as to realize precise control of the discharge amount.

[0027] Please see Figure 1 and Figure 3As shown, the printing platform 2 further includes a powder storage chamber 201, a printing chamber 207, a powder overflow chamber 206, an electrically retractable discharge plate 1 202, an electrically retractable discharge plate 205, a secondary lifting rod 203, a main lifting rod 204, a bidirectional scraper 208, a recovery chamber 209, and an electrically retractable discharge plate 3 210. The powder storage chamber 201 and the powder overflow chamber 206 are located on both sides of the printing chamber 207. The electrically retractable discharge plate 205 is located at the bottom of the powder overflow chamber 206. The main lifting rod 204 is located at the bottom of the printing chamber 207. The electrically retractable discharge plate 1 202 is located at the bottom of the powder storage chamber 201. There are four secondary lifting rods 203, which are located around the bottom of the electrically retractable discharge plate 1 202. The recovery chamber 209 is located on the left side of the powder storage chamber 201. The bidirectional scraper 208 is located above the powder storage chamber 201. The electrically retractable discharge plate 3 210 is located at the bottom of the recovery chamber 209.

[0028] In this embodiment, the electric telescopic discharge plate 202 can be moved up and down by setting the auxiliary lifting rod 203. The bottom center of the powder storage chamber 201 is connected to the funnel of the powder storage and circulation screening device 3 through the electric telescopic discharge plate 202. The printing chamber 207 realizes the printing function through the main lifting rod 204. The telescopic movement of the electric telescopic discharge plate 205 enables the particles in the overflow chamber 206 to fall into the overflow recovery screening device 15 below. The bidirectional scraper 208 (the bidirectional scraper 208 is set on the slider module. The motor drives the slider module to move bidirectionally, thereby realizing the movement of the bidirectional scraper 208 on the slider module. The slider module and motor are prior art and common knowledge, and are not shown in the figure) flattens the surface of the powder storage chamber 201 and scrapes the remaining powder into the recovery chamber 209. The electric telescopic discharge plate 210 moves the powder to fall into the powder storage and circulation screening device 3.

[0029] Please see Figure 1 and Figure 4 As shown, the powder storage and circulating screening device 3 further includes a receiving funnel 301 and a diameter converter 302. The receiving funnel 301 is located on top of the diameter converter 302. The bottom of the diameter converter 302 is provided with a material box 303 and a material box 310. The material box 303 and the material box 310 are connected by a mesh frame 304. The material box 303 is connected to the suction bin 8 through a discharge pipe 308. The material box 310 is connected to the suction bin 9 through a discharge pipe 306. An electric butterfly valve 309 is provided on the discharge pipe 308. An electric butterfly valve 307 is provided on the discharge pipe 306. A vibrating base 305 is provided at the bottom of the material box 310.

[0030] In this embodiment, by setting the mesh frame 304 between the material box 303 and the material box 310, gradient screening of particles of different sizes is achieved; the vibrating base 305 plays a vibrating role, which speeds up the screening efficiency; by adjusting the electric butterfly valve 309, the discharge pipe 308 can be opened or closed, and by adjusting the electric butterfly valve 307, the discharge pipe 306 can be opened or closed.

[0031] Please see Figure 1 and Figure 5 As shown, the overflow powder recovery screening device 15 further includes a receiving funnel 2 1501 and a diameter converter 2 1502. The receiving funnel 2 1501 is located on top of the diameter converter 2 1502. At the bottom of the diameter converter 2 1502, material boxes 3 1503, 4 1514, and 5 1510 are sequentially arranged. Material boxes 3 1503 and 4 1514 are connected by a mesh frame 2 1504, and material boxes 4 1514 and 5 1510 are connected by a mesh frame 3 1512. 1503 is connected to the waste bin 14 via the discharge pipe 3 1511. The discharge pipe 3 1511 is equipped with an electric butterfly valve 3 1513. The material box 4 1514 is connected to the suction bin 4 13 via the discharge pipe 4 1507. The discharge pipe 4 1507 is equipped with an electric butterfly valve 4 1505. The material box 5 1510 is connected to the suction bin 3 12 via the discharge pipe 5 1508. The discharge pipe 5 1508 is equipped with an electric butterfly valve 5 1506. The bottom of the material box 5 1510 is equipped with a vibration base 2 1509.

[0032] In this embodiment, the aperture of the second mesh frame 1504 is larger than that of the third mesh frame 1512, which can realize the gradient screening of printing waste and recyclable particles. By adjusting the electric butterfly valve 1513, the discharge pipe 1511 can be opened or closed. By adjusting the electric butterfly valve 1505, the discharge pipe 1507 can be opened or closed. By adjusting the electric butterfly valve 1506, the discharge pipe 1508 can be opened or closed.

[0033] The working principle of this utility model:

[0034] Particles in the powder storage chamber 201 and the recovery chamber 209 first enter the material box 303 through the receiving funnel 301. The screen frame 304 can screen the particles. The particles in the material box 303 enter the suction bin 8 through the discharge pipe 308. The particles in the material box 310 enter the suction bin 9 through the discharge pipe 306. The vibrating base 305 vibrates to speed up the screening efficiency. After the particles are screened, the electric butterfly valve 309 and the electric butterfly valve 307 are closed to form a closed environment in the pipeline. The air pump 4 is started to transport the particles in the suction bin 8 to the feeding tank 104. The air pump 5 can transport the particles in the suction bin 9 to the feeding tank 112.

[0035] By starting motor 101, the rotating shaft 103 connected via coupling 102 is driven to rotate. Rotating shaft 103 is connected to the feeding turntable 105 on feeding tank 104, so that rotating shaft 103 drives the connected feeding turntable 105 to rotate. The feeding ratio in feeding tank 104 is achieved by adjusting the rotation speed. Starting motor 115 drives rotating shaft 113 connected via coupling 114 to rotate. Rotating shaft 113 is connected to the feeding tank 112... The feeding turntable 210 is connected, so that when the rotating shaft 213 rotates, it drives the connected feeding turntable 210 to rotate. The feeding ratio in the feeding tank 212 is achieved by adjusting the speed. By starting the motor 3111, the rotating shaft 3108 connected by the coupling 3109 is driven to rotate. Since the rotating shaft 3108 is connected to the discharge turntable 3106 on the mixing chamber 107, the rotating shaft 3108 drives the discharge turntable 3106 to rotate, so as to achieve precise control of the discharge amount.

[0036] Printing chamber 207 achieves printing function through main lifting rod 204. The extension and retraction of electric telescopic discharge plate 205 allows particles in overflow chamber 206 to enter material box 3 1503 through receiving funnel 2 1501. Screen frame 2 1504 and screen frame 3 1512 can screen the particles respectively. Particles in material box 3 1503 enter waste bin 14 through discharge pipe 3 1511. Particles in material box 4 1514 enter suction bin 4 13 through discharge pipe 4 1507. Particles in material box 5 1510 enter suction bin 3 12 through discharge pipe 5 1508. Vibrating base 2 1509 plays a vibrating role to speed up screening efficiency. Since suction bin 3 12 is connected to suction bin 2 9 through connecting pipe 2 11, and suction bin 1 8 is connected to suction bin 4 13 through connecting pipe 1 10, recycling and reuse are realized.

[0037] This invention relates to a laser selective melting and forming device for nanoparticle-reinforced gradient materials, effectively overcoming the printing challenges of single materials and single particle ratios. Utilizing a programmable gradient feeding device, it achieves real-time control of the nanoparticle-reinforced phase content through dual independent discharge ports with high precision. This enables gradient powder spreading with different particle composition ratios during the printing process, completing the printing of nanoparticle-reinforced gradient materials. This allows for flexible adjustment of material property distribution, improving the service performance of components in complex environments. To automate the powder preparation and circulation process of the nanoparticle-reinforced materials, unused particles in the powder storage chamber of the printing platform are automatically sucked in by a powder storage and circulation screening device, passing through different particle size sieves. After separation, the powder is immediately returned to the feeding device through a closed pipeline, forming a fully closed-loop automated process. This process significantly reduces manual intervention, lowers operational complexity and error probability, and significantly improves production efficiency and process stability. After printing, excess powder is collected again into the overflow powder recovery screening device, where waste and reusable particles are screened with high precision. The reusable powder is then fed back into the feeding device, implementing high-utilization recycling and reuse. This process, driven by technological innovation, not only significantly reduces raw material consumption and production costs but also injects sustainable development momentum into laser selective melting technology through the efficient recycling of powder resources.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser selective melting and forming apparatus for nanoparticle-enhanced gradient materials, characterized in that, The system includes a printing platform (2), on which a feeding device (1), a powder storage and circulation screening device (3), and an overflow powder recovery screening device (15) are respectively provided. On one side of the printing platform (2) are suction bin one (8), suction bin two (9), suction bin three (12), and suction bin four (13). Suction bin one (8) is connected to suction bin four (13) via connecting pipe one (10), and suction bin two (9) is connected to suction bin two (13) via connecting pipe two (12). 11) Connected to suction bin three (12), the top of suction bin one (8) is connected to air pump one (4) through suction pipe one (6), suction bin two (9) is connected to air pump two (5) through suction pipe two (7), air pump one (4) is connected to feeding device (1) through feeding pipe one (17), air pump two (5) is connected to feeding device (1) through feeding pipe two (16), and a waste bin (14) is provided on one side of suction bin four (13).

2. The laser selective melting and forming apparatus for nanoparticle-enhanced gradient materials according to claim 1, characterized in that: The feeding device (1) includes a feeding mechanism and a mixing mechanism. The feeding mechanism includes a motor (101) and a motor (115). The motor (101) is connected to a rotating shaft (103) via a coupling (102). The motor (115) is connected to a rotating shaft (113) via a coupling (114). A feeding tank (104) is provided at the bottom of the rotating shaft (103). A feeding turntable (104) is provided at the bottom of the feeding tank (104). 5) One end of the bottom of the first rotating shaft (103) passes through the first feeding tank (104) and extends to the bottom of the first feeding tank (104), and the end is fixedly connected to the first feeding turntable (105). The first feeding tank (104) is movably connected to the first rotating shaft (103) and the first feeding turntable (105) respectively. The bottom of the second rotating shaft (113) is provided with the second feeding tank (112). The bottom of the second feeding tank (112) is provided with the second feeding turntable (110). The second rotating shaft (113) is... One end of the bottom of the feed tank (113) passes through the feed tank (112) and extends to the bottom of the feed tank (112), and the end is fixedly connected to the feed turntable (110). The feed tank (112) is movably connected to the rotating shaft (113) and the feed turntable (110) respectively. The mixing mechanism includes a motor (111) and a mixing chamber (107). The motor (111) is installed on the mixing chamber (107). The motor (111) is connected to the mixing chamber (107) by a coupling (109). The mixing chamber (107) is connected by a rotating shaft three (108) and a discharge turntable three (106). The feeding turntable one (105) and the feeding turntable two (110) are respectively set on the top two sides of the mixing chamber (107). One end of the bottom of the rotating shaft three (108) passes through the mixing chamber (107) and extends to the bottom of the mixing chamber (107), and the end is fixedly connected to the discharge turntable three (106). The mixing chamber (107) is movably connected to the rotating shaft three (108) and the discharge turntable three (106).

3. The laser selective melting and forming apparatus for nanoparticle-enhanced gradient materials according to claim 1, characterized in that: The printing platform (2) includes a powder storage chamber (201), a printing chamber (207), a powder overflow chamber (206), an electrically retractable discharge plate one (202), an electrically retractable discharge plate two (205), a secondary lifting rod (203), a main lifting rod (204), a bidirectional scraper (208), a recovery chamber (209), and an electrically retractable discharge plate three (210). The powder storage chamber (201) and the powder overflow chamber (206) are located on both sides of the printing chamber (207). The electrically retractable discharge plate two (205) is located in the powder overflow chamber (206). The main lifting rod (204) is located at the bottom of the printing chamber (207), the electric telescopic discharge plate one (202) is located at the bottom of the powder storage chamber (201), four auxiliary lifting rods (203) are provided, and they are located around the bottom of the electric telescopic discharge plate one (202) respectively. The recycling chamber (209) is located on the left side of the powder storage chamber (201), the bidirectional scraper (208) is located above the powder storage chamber (201), and the electric telescopic discharge plate three (210) is located at the bottom of the recycling chamber (209).

4. The laser selective melting and forming apparatus for nanoparticle-enhanced gradient materials according to claim 1, characterized in that: The powder storage and circulating screening device (3) includes a receiving funnel (301) and a diameter converter (302). The receiving funnel (301) is located on the top of the diameter converter (302). The bottom of the diameter converter (302) is provided with a material box (303) and a material box (310). The material box (303) and the material box (310) are connected by a mesh frame (304). The material box (303) is connected to the suction bin (8) through a discharge pipe (308). The material box (310) is connected to the suction bin (9) through a discharge pipe (306). An electric butterfly valve (309) is provided on the discharge pipe (308). An electric butterfly valve (307) is provided on the discharge pipe (306). A vibrating base (305) is provided at the bottom of the material box (310).

5. The laser selective melting and forming apparatus for nanoparticle-enhanced gradient materials according to claim 1, characterized in that: The overflow powder recovery screening device (15) includes a second receiving funnel (1501) and a second diameter converter (1502). The second receiving funnel (1501) is located on top of the second diameter converter (1502). The bottom of the second diameter converter (1502) is sequentially provided with a third material box (1503), a fourth material box (1514), and a fifth material box (1510). The third material box (1503) and the fourth material box (1514) are connected by a second mesh frame (1504). The fourth material box (1514) and the fifth material box (1510) are connected by a third mesh frame (1512). The third material box (1503)... The material box is connected to the waste bin (14) via the discharge pipe three (1511), and an electric butterfly valve three (1513) is provided on the discharge pipe three (1511). The material box four (1514) is connected to the suction bin four (13) via the discharge pipe four (1507), and an electric butterfly valve four (1505) is provided on the discharge pipe four (1507). The material box five (1510) is connected to the suction bin three (12) via the discharge pipe five (1508), and an electric butterfly valve five (1506) is provided on the discharge pipe five (1508). A vibration base two (1509) is provided at the bottom of the material box five (1510).

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