Multi-axis collaborative curved surface conformal structure integral manufacturing device and method

Abstract

The invention provides a multi-axis cooperative curved surface conformal structure integral manufacturing device and method. The device is composed of two quantitative powder laying systems, three ink-jet printing systems, a multi-degree-of-freedom clamping platform, a short fiber embedding clamp, a forming box lifting system and an integral frame. The device is high in forming speed, high in forming precision and wide in product adaptability, and performance structures required by different positions of the same part are optimized. And in addition, a multifunctional composite structural part can be formed, and the development of the 3D printing technology to diversified technology application is promoted.

Description

Technical Field

[0001] The present invention belongs to additive manufacturing 3D printing, relates to the field of multi-material printing design and manufacturing, and particularly relates to an overall manufacturing method and device for a multi-axis collaborative curved surface conformal structure. Background Art

[0002] The application of 3D printing technology in the field of curved surface conformal structure manufacturing is one of the important directions of scientific and technological development in recent years. Curved surface conformal structures, especially conformal circuits, have attracted much attention due to their wide applications in fields such as aerospace, wearable devices, and flexible electronics. These structures can closely adhere to complex curved surfaces, thereby reducing the installation space and the weight of the carrier.

[0003] The manufacturing technology of curved surface conformal circuits can be traced back to the 1970s, when mainly the patch technology was used to realize spherical conformal array antennas. However, with the development of 3D additive manufacturing technology, directly printing on irregular curved surfaces using nano-conductive paste or conductive ink has become a new manufacturing method. This method simplifies the manufacturing process, reduces costs, and expands the application scope of curved surface conformal circuits.

[0004] In the technical background of multi-axis collaborative curved surface conformal structures, the design of the control system is crucial. Currently, researchers at Rongcheng College of Harbin University of Science and Technology have proposed a multi-axis linkage printing control system design based on an Arduino development board and an STM8 chip. This system can achieve the conformal circuit printing control of conductive paste on complex three-dimensional curved surfaces. The design of this system includes a power supply relay protection and control unit, a system central control processor, a motion control unit, a temperature detection unit, a gas control unit, and a laser control unit, etc. By connecting the upper computer PC and the STM8 chip that drives the mechanical device to move through two serial port communications, the independence and portability of the system are improved.

[0005] This patent combines surface conformal and multi-material printing net shaping, aiming to develop a new field of integrated manufacturing of multi-axis collaborative surface conformal structures. In terms of design: Surface conformal 3D printing allows for the direct manufacturing of structures on complex surfaces, while multi-material 3D printing enables the use of multiple materials in the same printing process. This combination provides unprecedented design freedom, enabling designers to create products that not only conform to the geometry but also meet the functional requirements of different regions. In terms of materials: Multi-material 3D printing can achieve precise addition of materials, avoiding material waste in traditional manufacturing. Surface conformal printing further optimizes material usage as it allows materials to be directly built on the desired surfaces, reducing the need for support structures. In terms of functions: Combining surface conformal and multi-material 3D printing enables the integration of multiple functions in a single component. For example, in the aerospace field, materials with different mechanical strengths or thermal properties can be printed at specific parts of an aircraft to adapt to different working environments. In terms of manufacturing precision: Surface conformal 3D printing systems usually have high-precision manipulators and laser optical systems, making it possible to manufacture high-precision structures on complex surfaces. The addition of multi-material printing further allows for precise control of different material properties in these high-precision structures. In terms of performance optimization: Multi-material 3D printing can achieve gradient changes in material properties, which is crucial for improving the performance of components. For example, materials with higher strength or wear resistance can be printed in critical areas of a component, while lighter or more economical materials are used in other areas. In terms of production efficiency: The combination of surface conformal and multi-material 3D printing reduces the need for post-processing and assembly as complex geometries and multi-material structures can be directly built during the printing process, thus improving production efficiency.

[0006] In summary, the combination of surface conformal and multi-material 3D printing has brought revolutionary changes to the manufacturing industry, providing higher design flexibility, material efficiency, and functional integration, while also offering new possibilities for innovative applications and performance optimization. With the continuous progress and innovation of technology, it is expected to achieve the manufacturing of surface conformal structures with higher precision and lower cost in the future. Summary of the Invention

[0007] To solve the above problems, the present invention provides an integrated manufacturing device and method for multi-axis collaborative surface conformal structures.

[0008] The specific solutions are as follows: An integrated manufacturing device for multi-axis collaborative surface conformal structures, which is composed of a quantitative powder spreading system, an inkjet printing system, a multi-degree-of-freedom clamping platform, a short fiber embedding fixture, a forming box lifting system, and an overall frame.

[0009] There are two sets of quantitative powder spreading systems, which are symmetrically arranged. They are composed of an inkjet printing system, Module 1, a cross beam, a sliding table, a powder dropping box, a powder dropping box bracket, an opening adjusting plate, a cylinder, a vibration motor, a powder dropping baffle, and Module 2. The inkjet printing system is fixed on Module 1, Module 1 is fixed on the cross beam, the cross beam is fixed on the sliding table, the sliding table is fixed on Module 2, the powder dropping box bracket is fixedly installed on the sliding table, the powder dropping box is fixedly installed on the powder dropping box bracket, the vibration motor is fixed on both diagonal sides of the powder dropping box, and the cylinder is fixed on both sides of the powder dropping box; The inkjet printing system is composed of an ink path control box, a primary ink cartridge, an ink feeding pump, a 0.2um filter, a secondary ink cartridge, a 10nm filter, a filtering pump, a ink supply pump, a ink return pump, a pressure sensor, a temperature sensor, a leak-proof valve, a damper, a defoamer, an exhaust pump, and a liquid level sensor. Before assembly, all components and pipes of the inkjet printing system need to be ultrasonically cleaned to ensure there are no impurities inside. Ink is supplied from the primary ink cartridge. The ink undergoes a primary rough filtration through the 0.2um filter and the ink feeding pump, and then flows into the ink return storage area of the secondary ink cartridge. Subsequently, the ink enters the ink supply storage area of the secondary ink cartridge through the 10nm filter and the filtering pump to complete the secondary filtration. The filtered ink is defoamed to prevent bubbles in the ink from affecting the inkjet pressure. Finally, the ink enters the nozzle through the ink supply pump, the damper, the leak-proof valve, and the pressure sensor. The excess liquid in the nozzle during the working cycle enters the pressure sensor, the leak-proof valve, the damper, the ink return pump, and the defoamer and then enters the ink return area of the secondary ink cartridge. Subsequently, it undergoes cyclic filtration to ensure the cleanliness of the ink entering the nozzle to avoid clogging the nozzle. The auxiliary components in the ink path, the liquid level sensor and the temperature sensor, are responsible for real-time monitoring of the ink volume and ink temperature at the liquid level to avoid affecting the nozzle printing; The multi-degree-of-freedom clamping platform is composed of a six-degree-of-freedom manipulator and a clamping workbench. The clamping workbench is composed of a clamping body, a motion cylinder, and a hinge mechanism; The short fiber embedding fixture is composed of a vacuum adsorption fixture and a six-degree-of-freedom robot. The vacuum adsorption fixture is composed of multiple small-aperture suction cups, and the short fibers are sucked and embedded by adjusting the pressure at the inlet and outlet; The forming box lifting system is composed of a box body wall plate, a box body lifting plate, a waste box, and a motor self-control lifting system. The waste box is fixed on both sides of the four surrounding plates of the forming box lifting system in the powder spreading direction. The lifting plate of the forming box lifting system is fixedly connected to the motor self-control lifting system; The overall frame is composed of a metal frame and Module 2. Module 2 is fixedly installed on the metal frame.

[0010] Furthermore, the opening adjusting plate of the powder dropping box adjusts the powder dropping size. The size of the opening of the powder dropping box can be adjusted according to the self-density of the powder and the powder spreading speed to ensure accurate powder dropping amount. The powder dropping flow rate S, the powder flow rate V at a certain opening width X , the powder spreading speed v, the opening width K, S = Vx * v * K.

[0011] Furthermore, the vibration motors are distributed on both sides of the symmetric angles of the powder dropping box, and the vibration of the powder dropping makes the powder dropping more uniform. By adjusting the vibration frequency, the uniformity and the amount of powder dropping can be improved, and the powder spreading efficiency can be enhanced (the vibration frequency of the motor is 200 - 800 Hz).

[0012] Furthermore, the powder dropping baffle is located at the powder dropping position of the powder dropping box and is used in cooperation with the air cylinder to control the stroke of the powder dropping. During the powder spreading process, the baffle opens when the air cylinder retracts, and after the powder spreading is completed, the baffle stops the powder spreading by blocking when the air cylinder extends, so as to avoid powder accumulation and affecting the printed forming surface.

[0013] Furthermore, the parts after high-temperature treatment are clamped by a multi-degree-of-freedom working platform. Through the movement of the six-degree-of-freedom working platform, the nozzle evenly sprays the nano-silver solution on the surface of the part to form electronic parts applicable to the conformal structure of multi-axis collaborative complex curved surfaces.

[0014] Furthermore, for the ultra-clean ink path circulation printing system, the ink in the ink return area of the secondary ink cartridge is filtered through a 10-nm filter and then filtered into the ink supply area of the secondary ink cartridge through circulation filtration, so that the ink at the ink supply end of the nozzle is free of impurities, and the service life of the nozzle is prolonged.

[0015] The overall manufacturing method for the multi-axis collaborative curved surface conformal structure specifically comprises the following steps: S1. The quantitative powder spreading system determines the opening size of the powder spreading box and the vibration motor frequency according to the quality of the powder material for powder spreading and printing and the printing layer thickness, so as to accurately control the amount of powder dropping; S2. The forming box lifting system determines the layer thickness stacking and forming of the printed model, and the overall framework provides support for the quantitative powder spreading system and the forming box lifting system; S3. After printing and forming, the performance of the formed parts is regulated through high-temperature sintering. According to the common manufacturing structure of multiple materials, a suitable printing method is selected, and the control path of the inkjet printing system and the working mode of the nozzle are controlled according to the performance requirements of the formed part structure position, and the binder jet metal 3D printing or the binder jet ceramic 3D printing can be freely switched; S4. According to the analysis and slicing of the model core structure, the quantitative powder spreading system and the inkjet system are guided to spread powder and print; S5. Through the short fiber embedding fixture, fiber tissues are embedded at the junction of the two powder spreading and printing processes to improve the bonding effect at the junction and ensure the strength of the overall structure of the parts; after the bonding is formed at a certain layer thickness, during the process, through staged high-temperature sintering, the shape and properties are controlled to form a complex curved surface conformal part with reliable bonding; S6. By placing the formed parts on a multi-axis degree-of-freedom control platform and selectively printing on the parts according to the contour shape, the nozzle solution is a nano-silver solution containing nano-silver particles, and layer-by-layer stacking forms a conformal structure of multi-axis collaborative complex curved surface conformal electronic components.

[0016] Furthermore, for the printing and forming of the multi-media curved surface forming structure, the co-planar printing and forming of two materials will result in insufficient structural strength at the junction of the two materials. Therefore, at the appropriate number of the last layers of metal powder printing, at the junction of the two materials printing, and the first five layers of ceramic printing, short fibers are inserted in sequence to improve the structural strength at the junction. Furthermore, a vacuum chuck fixture is adopted. By adjusting the pressure at the inlet and outlet of the fixture, the short fibers are clamped, embedded, and placed. Through the software control of the six-degree-of-freedom robotic arm, the short fibers can be effectively placed at the key positions of the printed parts, thus ensuring the strength of the multi-axis collaborative curved surface conformal complex curved surface parts.

[0017] After adopting the above technical solutions, the beneficial effects of the present invention are as follows: The device has a multi-degree-of-freedom tooling platform, which can directly print on the surfaces of various curved surfaces and complex three-dimensional electronic components.

[0018] 2. The device has multiple print nozzles that can be freely switched, which enables it to adapt to different materials and printing requirements, improving the applicability, flexibility, and efficiency of printing.

[0019] 3. The device and method can complete the printing and forming of complex curved surface conformal structure electronic components, demonstrating the feasibility of the multi-axis collaborative curved surface conformal structure device in future practical applications.

[0020] Through the above analysis, it can be seen that the multi-axis collaborative curved surface conformal structure device in the 3D printing field can not only improve the manufacturing accuracy and efficiency, but also expand the application fields of materials and technologies, providing strong technical support for the innovative manufacturing of products in various high-tech industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the general drawing of the multi-material powder spreading printing device; Figure 2 It is the upper view of the multi-material powder spreading printing device; Figure 3 For Figure 2 The screenshot at A-A in Figure 4 It is the plan view of the short fiber embedding mechanism; Figure 5 It is the front view of the fiber fixture; Figure 6 For Figure 5 The screenshot at B-B in Figure 7 Front view of the coplanar forming multi-axis printing inkjet device; Figure 8 Top view of the part clamping workbench; Figure 9 Schematic working diagram of the ultra-clean ink path printing system; Figure 10 Schematic diagram of multi-material quantitative powder spreading printing.

[0022] Description of the drawings: 101, inkjet printing system; 102, module 1; 103, crossbeam; 104, sliding table; 105, powder dropping box; 106, powder dropping box bracket; 107, opening adjusting plate; 108, cylinder; 109, vibration motor; 110, module 2; 111, metal frame; 112, powder dropping baffle; 113, lifting plate of the forming box lifting system; 114, waste box; 115, motor self-control lifting system; 116, surrounding plates of the forming box lifting system; 201, short fiber fixture; 202, six-degree-of-freedom robot; 211, fixture body; 212, negative pressure suction nozzle; 213, short fiber; 214, air inlet and outlet nozzle; 301, ultra-clean ink path system; 302, nozzle bracket; 303, part fixture table; 304, six-degree-of-freedom robotic arm; 305, nozzle box; 401, hinge mechanism; 402, fixture body; 403, cylinder. Detailed implementation manners

[0023] The present invention will be further clarified below in conjunction with the drawings and specific implementation manners. It should be understood that the following specific implementation manners are only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0024] Multi-axis collaborative conformal structure integrated manufacturing device. This device consists of 2 quantitative powder spreading systems, three inkjet printing systems, a multi-degree-of-freedom clamping platform, a short fiber embedding fixture, a forming box lifting system, and an integral frame (104), a powder dropping box (105), a powder dropping box support (106), an opening adjusting plate (107), a cylinder (108), a vibration motor (109), a powder dropping baffle (112), and module 2 (110). The inkjet printing systems are fixed on module 1, module 1 is fixed on the cross beam, the cross beam is fixed on the sliding table, the sliding table is fixed on module 2, the powder dropping box support is fixedly installed on the sliding table, the powder dropping box is fixedly installed on the powder dropping box support, the vibration motor is fixed on the two diagonal sides of the powder dropping box, and the cylinder is fixed on the two sides of the powder dropping box; The inkjet printing system consists of an ink path control box, a primary ink cartridge, an ink feeding pump, a 0.2um filter, a secondary ink cartridge, a 10nm filter, a filtering pump, a ink supply pump, an ink return pump, a pressure sensor, a temperature sensor, a leak-proof valve, a damper, a defoamer, an exhaust pump, and a liquid level sensor. Before the inkjet printing system is assembled, all components and pipes need to be ultrasonically cleaned to ensure there are no impurities inside. Ink is supplied from the primary ink cartridge. The ink undergoes a primary rough filtration through the 0.2um filter and the ink feeding pump, and then flows into the ink return storage area of the secondary ink cartridge. Subsequently, the ink enters the ink supply storage area of the secondary ink cartridge through the 10nm filter and the filtering pump to complete the secondary filtration. The filtered ink is defoamed to prevent bubbles in the ink from affecting the inkjet pressure. Finally, the ink enters the nozzle through the ink supply pump, the damper, the leak-proof valve, and the pressure sensor. The excess liquid in the nozzle during the working cycle enters the pressure sensor, the leak-proof valve, the damper, the ink return pump, and the defoamer and then enters the ink return area of the secondary ink cartridge. Subsequently, it undergoes cyclic filtration to ensure the cleanliness of the ink entering the nozzle to avoid clogging the nozzle. The auxiliary components in the ink path, the liquid level sensor and the temperature sensor, are responsible for monitoring the ink volume and ink temperature on the liquid level in real time to avoid affecting the nozzle printing; The multi-degree-of-freedom clamping platform consists of a six-degree-of-freedom manipulator (304) and a clamping workbench. The clamping workbench is composed of a fixture body (402), a motion cylinder (403), and a hinge (401) mechanism; The short fiber embedding fixture consists of a vacuum adsorption fixture and a six-degree-of-freedom robot (202). The vacuum adsorption fixture is composed of multiple small-aperture suction cups (212), and the short fibers are sucked and embedded by adjusting the pressure at the inlet and outlet; The forming box lifting system consists of the surrounding plates (116) of the forming box lifting system, the lifting plate (113) of the forming box lifting system, a waste box (114), and a motor self-controlled lifting system (115). The waste box is fixed on both sides of the surrounding plates of the forming box lifting system in the powder spreading direction. The lifting plate of the forming box lifting system is fixedly connected to the motor self-controlled lifting system; The integral frame consists of a metal frame and module 2. Module 2 is fixedly installed on the metal frame.

[0025] Among them, the opening adjustment plate of the powder dropping box adjusts the powder dropping amount. The size of the opening of the powder dropping box can be adjusted according to the self-density of the powder and the powder spreading speed to ensure accurate powder dropping amount. The powder dropping flow rate S, the powder flow rate V under a certain opening width X , the powder spreading speed v, the opening width K, S = Vx * v * K; Among them, the vibration motors are distributed on both sides of the symmetric angles of the powder dropping box. Vibration powder dropping makes the powder dropping more uniform. By adjusting the vibration frequency, the uniformity and amount of powder dropping are improved, and the powder spreading efficiency is increased (the vibration frequency of the motor is 200 - 800 Hz); Among them, the powder dropping baffle is located at the powder dropping position of the powder dropping box and is used in cooperation with the cylinder to control the powder dropping stroke. During the powder spreading process, the baffle opens when the cylinder retracts, and after the powder spreading is completed, the cylinder extends and the baffle closes the powder outlet to stop powder spreading, avoiding powder accumulation and affecting the printed forming surface; Among them, for multi-media curved surface forming structure printing and forming, co-planar printing and forming of two materials will cause insufficient structural strength at the junction of the two materials. Therefore, fibers are inserted successively at the appropriate number of the last layers of metal powder printing, at the junction of the two materials printing, and the first five layers of ceramic printing, so as to improve the structural strength of the parts at the junction; Among them, a vacuum suction cup fixture is adopted. By adjusting the pressure at the inlet and outlet of the fixture, short fibers are clamped, inserted, and placed. Through the software control of the six-degree-of-freedom robotic arm, the short fibers can be effectively placed at the key positions of the printed parts, thus ensuring the strength of the multi-axis collaborative complex curved surface conformal electronic parts.

[0026] Among them, the parts after high-temperature treatment are clamped by a multi-degree-of-freedom working platform. Through the movement of the six-degree-of-freedom working platform, the nozzle evenly sprays nano-silver solution on the surface of the parts to form multi-axis collaborative complex curved surface conformal electronic parts.

[0027] Among them, for the ultra-clean ink path circulation printing system, the ink in the ink return area of the secondary ink cartridge is filtered through a 10-nm filter and filtered into the ink inlet area of the secondary ink cartridge through circulation filtration, so that the ink at the ink supply end of the nozzle is free of impurities, and the service life of the nozzle is increased.

Claims

1. A multi-axis collaborative curved surface conformal structure integrated manufacturing device, characterized in that: It consists of a quantitative powder spreading system, an inkjet printing system, a multi-degree-of-freedom clamping platform, a short fiber embedding fixture, a forming box lifting system and an overall frame; There are two sets of quantitative powder spreading systems, which are symmetrically arranged and consist of an inkjet printing system, module 1, a crossbeam, a slide, a powder dropping box, a powder dropping box bracket, an opening adjustment plate, a cylinder, a vibration motor, a powder dropping baffle, and module 2. The inkjet printing system is fixed on module 1, module 1 is fixed on the crossbeam, the crossbeam is fixed on the slide, the slide is fixed on module 2, the powder dropping box bracket is fixedly installed on the slide, the powder dropping box is fixedly installed on the powder dropping box bracket, the vibration motor is fixed on both diagonal sides of the powder dropping box, and the cylinder is fixed on both sides of the powder dropping box; The inkjet printing system consists of an ink circuit control box, a primary ink cartridge, an ink supply pump, a 0.2um filter, a secondary ink cartridge, a 10nm filter, a filter pump, an ink supply pump, an ink return pump, a pressure sensor, a temperature sensor, a leak-proof valve, a damper, a defoamer, an exhaust pump, and a liquid level sensor. Before assembling the inkjet printing system, all parts and pipelines must be ultrasonically cleaned to ensure that there are no impurities inside. The ink is supplied from the primary ink cartridge, and the ink is coarsely filtered through a 0.2um filter and an ink supply pump, and then flows into the ink return storage area of ​​the secondary ink cartridge, and then the ink passes through a 10nm filter and a filter. The filter pump enters the ink supply storage area of ​​the secondary ink cartridge to complete the secondary filtration. The filtered ink is degassed to prevent bubbles in the ink from affecting the inkjet pressure. Finally, the ink enters the nozzle through the ink supply pump, damper, anti-leak valve and pressure sensor. The excess liquid in the nozzle during the working cycle enters the pressure sensor, anti-leak valve, damper, ink return pump and deaerator to enter the ink return area of ​​the secondary ink cartridge. Then, the circulation filtration is carried out to ensure the cleanliness of the ink entering the nozzle to avoid clogging the nozzle. The auxiliary components in the ink path, the liquid level sensor and temperature sensor, are responsible for real-time monitoring of the ink volume and ink temperature on the liquid level surface to avoid affecting the nozzle printing; The multi-degree-of-freedom clamping platform is composed of a six-degree-of-freedom manipulator and a clamping workbench. The clamping workbench is composed of a clamping body, a motion cylinder and a hinge mechanism. The short fiber embedding fixture is composed of a vacuum adsorption fixture and a six-degree-of-freedom robot. The vacuum adsorption fixture is composed of multiple small-aperture suction cups, and the short fibers are absorbed and embedded by adjusting the pressure of the inlet and outlet. The forming box lifting system is composed of the surrounding plates of the forming box lifting system, the lifting plate of the forming box lifting system, the waste box and the motor automatic lifting system. The waste box is fixed on both sides of the surrounding plates of the forming box lifting system in the powder laying direction, and the lifting plate of the forming box lifting system is fixedly connected to the motor automatic lifting system. The overall frame consists of a metal frame and a module 2, and the module 2 is fixedly mounted on the metal frame.

2. The device according to claim 1, characterized in that The opening adjustment plate of the powder box adjusts the powder falling size. The size of the opening of the powder box can be adjusted according to the density of the powder itself and the powder spreading speed to ensure accurate powder falling amount; the powder falling flow rate S, the powder flow rate V under a certain opening section X , powder spreading speed v, opening width K, S=Vx * v*K.

3. The device according to claim 1, characterized in that The vibration motors are distributed on both sides of the symmetrical angles of the powder dropping box. Vibration makes the powder dropping more uniform. By adjusting the vibration frequency, the uniformity and amount of powder dropping are improved, and the powder spreading efficiency is improved. The vibration frequency of the motor is between 200 and 800 Hz.

4. The device according to claim 1, characterized in that The powder dropping baffle is located at the powder dropping position of the powder dropping box and is used in conjunction with the cylinder to control the powder dropping stroke. During the powder spreading process, the cylinder retracts and the baffle opens. After the powder spreading is completed, the cylinder extends the baffle to stop the powder spreading to avoid powder accumulation and affect the printing forming surface.

5. The device according to claim 1, characterized in that: The parts after high-temperature treatment are clamped on a multi-degree-of-freedom work platform. Through the movement of the six-degree-of-freedom work platform, the nozzle evenly sprays the nano-silver solution on the surface of the parts to form multi-axis coordinated complex surface conformal electronic components.

6. The device according to claim 1, characterized in that: It also includes an ultra-clean ink circulation printing system, which filters the ink in the ink return area of ​​the secondary ink cartridge through a 10nm filter through circulation filtration to the ink inlet area of ​​the secondary ink cartridge, so that the ink at the ink supply end of the nozzle is free of impurities, thereby increasing the service life of the nozzle.

7. A method for manufacturing a multi-axis coordinated curved surface conformal structure as a whole, using the device as described in any one of claims 1 to 6, characterized in that: The specific steps are: S1. The quantitative powder spreading system determines the opening size of the powder spreading box and the frequency of the vibration motor according to the powder material quality and printing layer thickness of the powder spreading printing, so as to accurately control the amount of powder falling; S2. The forming box lifting system determines the layer thickness and stacking of the printed model. The overall frame provides support for the quantitative powder spreading system and the forming box lifting system. S3. After printing and forming, the performance of the formed parts is regulated by high-temperature sintering. The appropriate printing method is selected according to the common manufacturing structure of multiple materials. The control path and nozzle working mode of the inkjet printing system are controlled according to the structural position and performance requirements of the formed parts. The adhesive jetting metal 3D printing or adhesive jetting ceramic 3D printing is freely switched; S4. According to the analysis and slicing of the model core structure, guide the quantitative powder spreading system and the inkjet system to spread powder and print; S5. Through the short fiber embedding fixture, fiber tissue is embedded at the junction of the two powder printings to improve the bonding effect at the junction and ensure the strength of the overall structure of the parts. After a certain layer thickness is formed, the process is carried out through staged high-temperature sintering to control the shape and property to form a complex curved surface conformal part with a firm bond. S6. By placing the formed parts on a multi-axis freedom control platform, selective printing is performed on the parts according to the contour shape. The nozzle solution is a nanosilver solution containing nanosilver particles, which are stacked layer by layer to form a conformal structure of multi-axis coordinated complex curved surface conformal electronic parts.

8. The method according to claim 7, characterized in that When printing multi-media curved surface structures, printing two materials on the same plane will cause the structural strength at the junction of the two materials to be insufficient. Therefore, short fibers are inserted in sequence at the last appropriate number of layers of metal powder printing, at the junction of the two materials printing, and in the first five layers of ceramic printing, thereby improving the strength of the structure at the junction.

9. The method according to claim 7, characterized in that: A vacuum suction cup fixture is used to clamp, embed and place the short fibers by adjusting the pressure at the inlet and outlet of the fixture. The short fibers are then effectively placed at the key points of the connection position of the printed parts through the software control of a six-degree-of-freedom robot arm, thereby ensuring the strength of multi-axis collaborative complex surface conformal parts.

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