A method for printing a functional device based on a composite manufacturing apparatus in a space-oriented environment

Abstract

The application provides a composite manufacturing method for printing functional devices in a space environment, and the method comprises the following steps: slicing, moving a printing platform to a target position, supplying paving material, light curing forming, performing microstructure processing on a green ceramic substrate based on laser engraving, filling metal conductive material, controlling the printing platform to descend by one layer thickness, returning to step 2, and performing composite multi-material fine printing of the next printing layer, and continuously circulating in this way, so as to finally form a functional device with a complex structure. The application provides a new composite manufacturing method combining a light curing process, a laser manufacturing process and an inkjet / extrusion process, solves the printing problem of mixed manufacturing functional devices in a space environment, realizes high-precision on-orbit manufacturing of complex functional devices in a microgravity environment, and finally meets the demand of on-orbit application.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of space manufacturing, and particularly relates to a method for printing a functional device based on a composite manufacturing equipment in a space environment. BACKGROUND

[0002] With the gradual progress of human space exploration towards deep space, in order to cope with the challenges of long-term on-orbit survival, on-orbit in-situ manufacturing, in-situ supply and resource in-situ utilization technology will play a crucial role. Researchers in the field of spaceflight of various countries have begun to focus on the on-orbit application of space manufacturing technology, and have initially proposed space manufacturing technology mainly based on additive manufacturing. This technology can construct a three-dimensional structure based on a digital model file through layer-by-layer printing, and has the advantages of saving materials, high forming precision and fast speed. At present, the melting deposition and stereolithography forming process has been verified on-orbit, and can be successfully used for on-orbit manufacturing of high polymers, ceramics and biological tissues. However, future increasingly diversified space exploration tasks not only meet the on-orbit manufacturing of simple parts, but also directly form functional devices according to specific application scenarios, which will become one of the important development directions of space manufacturing technology.

[0003] Functional devices refer to devices that can meet the functional application requirements in addition to having a fixed structural form. According to different application scenarios, functional devices can be divided into actuators that can generate driving force, sensors that can perceive changes in themselves or changes in the external environment, energy suppliers that can provide energy, and energy storage devices that can store energy. The additive manufacturing preparation of functional devices is different from the appearance of traditional additive manufacturing parts in terms of the number and types of forming materials. For example, the preparation of space circuits requires the integrated forming of insulating materials and conductor materials, and the preparation of gas sensors requires the integrated forming of insulating materials, sensitive materials and electrode materials, which cannot be achieved by single-material additive manufacturing. Therefore, the multi-material forming process, interface interaction mechanism and forming performance regulation related problems are challenges faced by space manufacturing technology of functional devices. The microgravity characteristics and severe space environment of space have higher requirements for space manufacturing of functional devices. For the manufacturing process, it needs to meet the demand of multi-material forming while not affecting the space cabin environment and ensure good interface bonding; for the material system, it needs to have lower vacuum outgassing rate, higher comprehensive performance and better space environment adaptability.

[0004] At present, the additive manufacturing preparation of functional devices has the following problems: the traditional manufacturing process of functional devices on the ground is complex, many equipment are needed, and it cannot meet the demand of on-orbit resource envelope. Based on the above requirements, there is an urgent need for a composite manufacturing equipment for printing functional devices in a space environment and a method thereof, which solves the problem of multi-process compounding in a space environment and meets the demand of manufacturing functional devices on-orbit. SUMMARY

[0005] In view of the defects of the prior art, the present application provides a method for printing functional devices based on a composite manufacturing equipment in a space-oriented environment, which can effectively solve the above problems.

[0006] The technical scheme adopted by the present application is as follows:

[0007] The present application provides a method for printing functional devices based on a composite manufacturing equipment in a space-oriented environment, which includes a DLP light machine module (1), a feeding and paving subsystem (2), a printing platform subsystem (3), a micro-processing and multi-material forming subsystem (4), and an in-situ measurement subsystem (5).

[0008] The composite forming area is divided into a light-curing forming area and a micro-processing and multi-material forming area along the X direction; the light-curing forming area is arranged on the left side, and the micro-processing and multi-material forming area is arranged on the right side.

[0009] The printing platform subsystem (3) includes a printing platform (3.1), a printing platform X-direction moving mechanism (3.2), and a printing platform Z-direction moving mechanism; the printing platform X-direction moving mechanism (3.2) is used to drive the printing platform (3.1) to move along the X direction, so as to realize moving to the light-curing forming area or the micro-processing and multi-material forming area; the printing platform Z-direction moving mechanism is used to drive the printing platform (3.1) to move along the Z direction.

[0010] The feeding and paving subsystem (2) is arranged above the printing platform subsystem (3) and located in the light-curing forming area; the DLP light machine module (1) is fixedly installed above the light-curing forming area.

[0011] The micro-processing and multi-material forming subsystem (4) and the in-situ measurement subsystem (5) are arranged above the printing platform subsystem (3) and located in the micro-processing and multi-material forming area; the micro-processing and multi-material forming subsystem (4) includes a composite printing X-direction moving mechanism (4.1), a pulse laser (4.2), a pulse inkjet print head (4.3), and a direct writing extrusion head (4.4); the pulse laser (4.2), the pulse inkjet print head (4.3), and the direct writing extrusion head (4.4) are arranged along the X direction and are all connected with the composite printing X-direction moving mechanism (4.1); the in-situ measurement subsystem (5) is connected with the composite printing X-direction moving mechanism (4.1).

[0012] The feeding and paving subsystem (2) includes a feeding mechanism (2.1), a scraper (2.2), a scraper X-direction guide rail (2.3), a scraper X-direction conveying belt (2.4), and a scraper driving motor (2.5).

[0013] The bottom of the scraper (2.2) is in sliding connection with the scraper X-direction guide rail (2.3); the scraper (2.2) is connected with the scraper driving motor (2.5) through the scraper X-direction conveying belt (2.4); the feeding mechanism (2.1) is vertically arranged, the feeding port of the feeding mechanism (2.1) is vertically upward, and is located below the scraper (2.2);

[0014] The method comprises the following steps:

[0015] Step 1: uploading a three-dimensional model of a functional device to be printed to a slicing software; the slicing software performs slicing processing on the three-dimensional model of the functional device, generates a plurality of slices, and sets printing parameters of each slice, including: printing material, printing layer thickness, etching width and thickness, and wire filling amount;

[0016] Step 2: adjusting the X-direction position and Z-direction height of the printing platform (3.1) through the printing platform X-direction moving mechanism (3.2) and the printing platform Z-direction moving mechanism, and moving the printing platform (3.1) to the target position;

[0017] Step 3: supplying the material:

[0018] Through the feeding mechanism (2.1), the ceramic soft material printing material is extruded, and the scraper (2.2) is driven by the scraper driving motor (2.5) to flatten the ceramic soft material printing material on the surface of the printing platform (3.1) according to the set printing layer thickness;

[0019] Step 4: photocuring forming:

[0020] The DLP light machine module (1) is controlled to project ultraviolet light onto the ceramic soft material printing material on the surface of the printing platform (3.1) according to the set printing path, so that the ceramic soft material printing material is ultraviolet cured, the photocuring forming of a single layer of material is completed, and a cured green ceramic substrate is obtained;

[0021] Step 5: microstructure processing of the green ceramic substrate based on laser engraving:

[0022] The printing platform (3.1) is controlled to move to the micro-processing and multi-material forming area along the X-direction at the same height; the pulse laser (4.2) is controlled to generate a pulse laser beam, the laser beam is transmitted to the laser processing head through the transmission optical fiber, is focused and etched on the surface of the cured green ceramic substrate, and is microstructured according to the etching width and thickness, so as to obtain a microstructured green ceramic substrate;

[0023] Step 6: filling of the metal conductive material:

[0024] Control the pulse inkjet printhead (4.3) and / or direct writing extrusion head (4.4), fill the liquid metal material or conductive paste into the laser processed micro-channel of the micro-structured green ceramic substrate, fill the metal conductive material, and complete the single-layer printing;

[0025] Step 7, control the printing platform (3.1) to drop one layer thickness, then return to step 2, and perform the next printing layer composite multi-material fine printing, and so on, to finally form a complex structure functional device.

[0026] Preferably, during steps 5 and 6, the in-situ measurement subsystem (5) is used to measure the processing characteristics of laser etching and inkjet printing online, and the collected optical image data is transmitted to the background software;

[0027] The background software intelligently determines the processing quality through a deep learning algorithm, calibrates the positions between the various processing tools, and then compensates the position parameters through the motion control system to ensure that the laser grooving position and the inkjet position completely coincide.

[0028] Preferably, the UV light projection direction of the DLP light machine module (1) is vertically downward.

[0029] Preferably, the printing platform X-direction moving mechanism (3.2) includes a printing platform connector (3.2.1), a printing platform conveyor belt (3.2.2), a printing platform guide rail (3.2.3), and a printing platform motor (3.2.4).

[0030] The bottom of the printing platform (3.1) is slidably connected to the printing platform guide rail (3.2.3); the printing platform (3.1) is fixedly connected to the printing platform conveyor belt (3.2.2) through the printing platform connector (3.2.1); the printing platform motor (3.2.4) is connected to the printing platform conveyor belt (3.2.2) and used to drive the printing platform conveyor belt (3.2.2) to move along the X-direction.

[0031] Preferably, the composite printing X-direction moving mechanism (4.1) includes a multi-printing head X-direction guide rail (4.1.1), a multi-printing head control motor (4.1.2), and a multi-printing head X-direction transmission mechanism (4.1.3).

[0032] The multi-printing head control motor (4.1.2) is used to drive the multi-printing head X-direction transmission mechanism (4.1.3) to move in the X-direction; the pulse laser (4.2), the pulse inkjet printing head (4.3) and the direct writing extrusion head (4.4) are fixedly connected with the multi-printing head X-direction transmission mechanism (4.1.3); the pulse laser (4.2), the pulse inkjet printing head (4.3) and the direct writing extrusion head (4.4) are slidably connected with the multi-printing head X-direction guide rail (4.1.1).

[0033] The application provides a method for printing functional devices in a space environment based on a composite manufacturing device.

[0034] The application provides a novel composite manufacturing device combining a light curing process, a laser manufacturing process and an inkjet / extrusion process and a printing method thereof, solves the printing problem of mixed process manufacturing functional devices in a space environment, realizes high-precision on-orbit manufacturing of complex functional devices in a microgravity environment, and finally meets the demand of on-orbit application. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A flowchart of a composite manufacturing method for printing functional devices in a space environment provided by the application is shown in the figure.

[0036] Figure 2 A structural diagram of a composite manufacturing device for printing functional devices in a space environment provided by the application is shown in the figure. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects of the application clearer, the application is further described in detail below with reference to the drawings and examples.

[0038] The application provides a novel composite manufacturing device combining a light curing process, a laser manufacturing process and an inkjet / extrusion process and a printing method thereof, solves the printing problem of mixed process manufacturing functional devices in a space environment, realizes high-precision on-orbit manufacturing of complex functional devices in a microgravity environment, and finally meets the demand of on-orbit application.

[0039] REFERENCE Figure 2 The application provides a composite manufacturing device for printing functional devices in a space environment, which comprises a DLP light machine module 1, a feeding and paving subsystem 2, a printing platform subsystem 3, a micro-processing and multi-material forming subsystem 4 and an in-situ measurement subsystem 5.

[0040] The composite molding area is divided into a light-curing molding area and a micro-machining and multi-material molding area along the X direction; the light-curing molding area is arranged on the left side, and the micro-machining and multi-material molding area is arranged on the right side.

[0041] The printing platform subsystem 3 comprises a printing platform 3.1, a printing platform X-direction moving mechanism 3.2 and a printing platform Z-direction moving mechanism; the printing platform X-direction moving mechanism 3.2 is used to drive the printing platform 3.1 to move along the X direction, so as to move to the light-curing molding area or the micro-machining and multi-material molding area; the printing platform Z-direction moving mechanism is used to drive the printing platform 3.1 to move along the Z direction; as an embodiment, the printing platform X-direction moving mechanism 3.2 comprises a printing platform connecting piece 3.2.1, a printing platform conveying belt 3.2.2, a printing platform guide rail 3.2.3 and a printing platform motor 3.2.4; the bottom of the printing platform 3.1 is slidably connected with the printing platform guide rail 3.2.3; the printing platform 3.1 is fixedly connected with the printing platform conveying belt 3.2.2 through the printing platform connecting piece 3.2.1; the printing platform motor 3.2.4 is connected with the printing platform conveying belt 3.2.2, and is used to drive the printing platform conveying belt 3.2.2 to move along the X direction.

[0042] Above the printing platform subsystem 3 and in the light-curing molding area, a feeding and paving subsystem 2 is arranged; the feeding and paving subsystem 2 comprises a feeding mechanism 2.1, a scraper 2.2, a scraper X-direction guide rail 2.3, a scraper X-direction conveying belt 2.4 and a scraper driving motor 2.5; the bottom of the scraper 2.2 is slidably connected with the scraper X-direction guide rail 2.3; the scraper 2.2 is connected with the scraper driving motor 2.5 through the scraper X-direction conveying belt 2.4; the feeding mechanism 2.1 is vertically arranged, the feeding port of the feeding mechanism 2.1 is vertically upward, and is located below the scraper 2.2.

[0043] Above the light-curing molding area, a DLP light machine module 1 is fixedly arranged; the projection direction of the ultraviolet light of the DLP light machine module 1 is vertically downward.

[0044] Above the printing platform subsystem 3, and in the micro-machining and multi-material forming area, a micro-machining and multi-material forming subsystem 4 and an in-situ measurement subsystem 5 are arranged; the micro-machining and multi-material forming subsystem 4 comprises a composite printing X-direction moving mechanism 4.1, a pulsed laser 4.2, a pulsed inkjet print head 4.3 and a direct writing extrusion head 4.4; the pulsed laser 4.2, the pulsed inkjet print head 4.3 and the direct writing extrusion head 4.4 are arranged along the X-direction and are connected with the composite printing X-direction moving mechanism 4.1; the in-situ measurement subsystem 5 is connected with the composite printing X-direction moving mechanism 4.1. As an embodiment, the composite printing X-direction moving mechanism 4.1 comprises a multi-print head X-direction guide rail 4.1.1, a multi-print head control motor 4.1.2 and a multi-print head X-direction transmission mechanism 4.1.3; the multi-print head control motor 4.1.2 is used to drive the multi-print head X-direction transmission mechanism 4.1.3 to move along the X-direction; the pulsed laser 4.2, the pulsed inkjet print head 4.3 and the direct writing extrusion head 4.4 are fixedly connected with the multi-print head X-direction transmission mechanism 4.1.3; the pulsed laser 4.2, the pulsed inkjet print head 4.3 and the direct writing extrusion head 4.4 are slidably connected with the multi-print head X-direction guide rail 4.1.1.

[0045] An embodiment of a composite manufacturing equipment for printing functional devices in a space environment is introduced as follows:

[0046] 1. The overall main frame structure divides the composite forming platform into two parts, the left part is the light curing forming area, and the right part is the micro-machining and multi-material forming area. The DLP light machine module 1 is arranged above the light curing forming area and is fixed on the overall frame. The main function of the DLP light machine module 1 is to project the cured forming image to the surface of the printing platform through ultraviolet light, that is, to project the ultraviolet light through the digital processor to cure the forming material.

[0047] 2. The printing platform 3.1 moves downward layer by layer according to the control instruction, and cooperates with the material laying system and the exposure system (i.e. the DLP light machine module 1) to complete the curing and forming of the material.

[0048] The printing platform subsystem comprises a printing platform base, a detachable printing plate, a high-precision lead screw, a high-precision guide rail, a stepping motor, an encoder and the like.

[0049] 3. A single-sided feeding mode is adopted, and the feeding mechanism 2.1 is fixed on the left side of the printing platform. The feeding mechanism 2.1 adopts a through-type piston feeding mode. In order to prevent the material from spilling out during the launch and to provide a good protection environment to avoid the deterioration or hardening of the material, the feeding mechanism 2.1 is designed with a releaseable protective cover. The feeding mechanism 2.1 comprises a through-type stepping motor, an outer shell (which is designed in an integrated manner with the platform base) and a protective cover.

[0050] 4. The laying device in the feeding and laying subsystem 2 comprises high-precision guide rails, a hinged laying knife holder, an adjustable laying knife, an electromagnetic chuck, etc. During the forming process, after each exposure, the printing platform is lowered by a layer thickness, and the laying system completes the laying action. The double scraper structure is adopted, the scraper is made of ceramic material, and after the laying is completed, the electromagnetic chuck switches the hinged knife holder to prepare for the next laying.

[0051] Specifically, the scraper moving device motor, the scraper conveyor belt, the scraper, the scraper guide rail and the feeding mechanism form a high-precision feeding and scraper system. The special ceramic soft material is extruded by the automatic feeding device, uniformly laid on the printing platform by the micron-level precision scraper, and the magnet chuck type scraper can reciprocate, and the layer thickness precision is controllable.

[0052] 5. The printing platform can reciprocate in the vertical direction through the Z-axis motor and in the horizontal axis direction through the X-axis motor. The printing platform is designed with a quick release mechanism to meet the adhesion requirements of different materials on the substrate.

[0053] In the present application, the printing platform can move in the X and Z directions, the printing platform can be quickly disassembled, and different material textures can also be replaced.

[0054] 6. The micro-processing and multi-material forming area realizes three-dimensional motion of multi-process composite printing through the Y-phase gantry structure and the X-phase three-axis motion mechanism, with a repeated positioning accuracy of 5 microns and a three-axis motion accuracy of 5 microns.

[0055] 7. The pulse laser 4.2, the pulse inkjet printhead 4.3 and the direct writing extrusion head 4.4 are installed on the X-axis through a slider. The X-axis also includes a lead screw and a motor.

[0056] The pulse inkjet printhead 4.3 and the direct writing extrusion head 4.4 serve as multi-material printing heads and can be switched according to printing needs to complete the printing of single materials and composite materials.

[0057] The pulse laser 4.2, the pulse inkjet printhead 4.3 and the direct writing extrusion head 4.4 work together to complete the manufacturing of composite processes.

[0058] 8. The laser processing head is fixed on the moving slide through the screw hole at the back of the micro scanning galvanometer.

[0059] 9. The movement of the printing nozzle (pulse laser 4.2, pulse inkjet printhead 4.3 and direct writing extrusion head 4.4) is driven by the motor, the movement of the cross beam (scraper cross beam, printhead) is driven by the motor driving the lead screw, and the lowering of the printing platform is driven by the motor, realizing layer-by-layer printing forming.

[0060] 10、In-situ measurement subsystem 5 includes a hardware system and a software system. The role of the in-situ measurement subsystem 5 is to measure the laser etching, inkjet and other processing features online, and transmit the collected optical image data to the background software for processing. The processing quality is intelligently determined through a deep learning algorithm; and the positions between various processing tools are calibrated, and the position parameters are compensated through a motion control system to ensure that the laser groove position and the inkjet position completely coincide.

[0061] Therefore, the in-situ measurement subsystem 5 provides real-time feedback on precision to ensure printing accuracy.

[0062] 11、Pulsed laser 4.2 is mainly composed of a laser and a laser processing head. The laser generates a pulsed laser beam. The laser beam is transmitted to the laser processing head through a transmission optical fiber, and after focusing through the laser processing head, the surface of the printed part is etched.

[0063] Reference Figure 1 The application also provides a method for composite manufacturing equipment based on a functional device printed in a space environment, comprising the following steps:

[0064] Step 1: upload the three-dimensional model of the functional device to be printed to the slicing software; the slicing software performs slicing processing on the three-dimensional model of the functional device to generate multiple slices, and sets the printing parameters of each slice, including: printing material, printing layer thickness, etching width and thickness, and wire filling amount;

[0065] Step 2: adjust the X-direction position and Z-direction height of the printing platform 3.1 through the printing platform X-direction moving mechanism 3.2 and the printing platform Z-direction moving mechanism, and move the printing platform 3.1 to the target position;

[0066] Step 3: supply the material:

[0067] The ceramic soft material printing material is extruded through the material supply mechanism 2.1, and the scraper 2.2 is driven by the scraper driving motor 2.5 to spread the ceramic soft material printing material on the surface of the printing platform 3.1 according to the set printing layer thickness;

[0068] Step 4: photocuring forming:

[0069] The DLP light machine module 1 projects ultraviolet light onto the ceramic soft material printing material on the surface of the printing platform 3.1 according to the set printing path, so that the ceramic soft material printing material is ultraviolet cured, the photocuring forming of a single layer of material is completed, and a cured green ceramic substrate is obtained, with a layer thickness of 100-200 μm;

[0070] Step 5: microstructure processing of the green ceramic substrate based on laser engraving:

[0071] Control the printing platform 3.1 to move along the X direction to the micro-processing and multi-material forming area; control the pulse laser 4.2 to generate a pulse laser beam, the laser beam is transmitted to the laser processing head through the transmission optical fiber, and the surface of the solidified green porcelain substrate is etched and focused to process the microstructure according to the etching width and thickness, so that the green porcelain substrate after microstructure processing is obtained; for example, the size line width is 50-150 μm, and the thickness is 5-15 μm.

[0072] Step 6, filling of metal conductive material:

[0073] Through the multi-material micro-nano forming assembly, based on the pulse inkjet printhead 4.3 and / or the direct writing extrusion head 4.4, the liquid metal material or conductive paste is filled into the laser-processed micro-channel of the microstructure-processed green porcelain substrate, the filling of the metal conductive material is carried out, and the single-layer printing is completed; wherein the conductive paste includes gold paste, silver paste, copper and the like.

[0074] When steps 5 and 6 are carried out, the in-situ measurement system 5 measures the processing characteristics of the laser etching and the inkjet of the printhead online, and transmits the collected optical image data to the background software; the background software intelligently judges the processing quality through the deep learning algorithm; the positions of the various processing tools are calibrated, and the position parameters are compensated through the motion control system to ensure that the laser etching position and the inkjet position completely coincide.

[0075] Step 7, control the printing platform 3.1 to drop one layer thickness, and then return to step 2 to carry out the composite multi-material fine printing of the next printing layer, so as to continuously cycle, and the solidification, processing and filling of each layer are carried out, until the printing of the entire functional device is completed, finally assisted high-temperature sintering, and finally the functional device with complex structure is formed.

[0076] The above technical scheme is adopted in the present application, which has the following advantages:

[0077] The present application takes photocuring as the main forming platform, and can directly form ceramic materials and resin materials by using DLP technology; at the same time, through the special design of the multi-degree-of-freedom moving mechanism, the main forming platform can be easily moved to the micro-processing area, and then the laser process module is used to process the printed model, and finally the inkjet / extrusion module is used to fill the two-phase materials, so as to solve the problem of printing and forming of functional devices under specific conditions, and realize high-precision on-orbit manufacturing.

[0078] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A method for composite manufacturing of a functional device based on printing in a space facing environment, characterized by, The composite manufacturing equipment for printing functional devices in space environment comprises a DLP light machine module (1), a feeding and paving subsystem (2), a printing platform subsystem (3), a micro-processing and multi-material forming subsystem (4) and an in-situ measurement subsystem (5); The composite forming area is divided into a light curing forming area and a micro-processing and multi-material forming area along the X direction; the light curing forming area is arranged on the left side, and the micro-processing and multi-material forming area is arranged on the right side; The printing platform subsystem (3) comprises a printing platform (3.1), a printing platform X direction moving mechanism (3.2) and a printing platform Z direction moving mechanism; the printing platform X direction moving mechanism (3.2) is used for driving the printing platform (3.1) to move along the X direction, so as to realize moving to the light curing forming area or the micro-processing and multi-material forming area; the printing platform Z direction moving mechanism is used for driving the printing platform (3.1) to move along the Z direction; The feeding and paving subsystem (2) is arranged above the printing platform subsystem (3) and located in the light curing forming area; the DLP light machine module (1) is fixedly installed above the light curing forming area; The micro-processing and multi-material forming subsystem (4) and the in-situ measurement subsystem (5) are arranged above the printing platform subsystem (3) and located in the micro-processing and multi-material forming area; the micro-processing and multi-material forming subsystem (4) comprises a composite printing X direction moving mechanism (4.1), a pulse laser (4.2), a pulse inkjet print head (4.3) and a direct writing extrusion head (4.4); the pulse laser (4.2), the pulse inkjet print head (4.3) and the direct writing extrusion head (4.4) are arranged along the X direction and are connected with the composite printing X direction moving mechanism (4.1); the in-situ measurement subsystem (5) is connected with the composite printing X direction moving mechanism (4.1); The feeding and paving subsystem (2) comprises a feeding mechanism (2.1), a scraper (2.2), a scraper X direction guide rail (2.3), a scraper X direction conveying belt (2.4) and a scraper driving motor (2.5); The bottom of the scraper (2.2) is slidably connected with the scraper X direction guide rail (2.3); the scraper (2.2) is connected with the scraper driving motor (2.5) through the scraper X direction conveying belt (2.4); the feeding mechanism (2.1) is vertically arranged, the feeding port of the feeding mechanism (2.1) is vertically upward and located below the scraper (2.2); The method comprises the following steps: Step 1: uploading a three-dimensional model of a functional device to be printed to a slicing software; the slicing software performs slicing processing on the three-dimensional model of the functional device, generates a plurality of slices, and sets printing parameters of each slice, including printing material, printing layer thickness, etching width and thickness and wire filling amount; Step 2: adjusting the X direction position and Z direction height of the printing platform (3.1) by the printing platform X direction moving mechanism (3.2) and the printing platform Z direction moving mechanism, and moving the printing platform (3.1) to a target position; Step 3, for paving: Through the feeding mechanism (2.1), the ceramic soft material printing material is extruded, and the scraper (2.2) is driven by the scraper driving motor (2.5) to pave the ceramic soft material printing material on the surface of the printing platform (3.1) according to the set printing layer thickness; Step 4, photocuring forming: The DLP light machine module (1) is controlled to project ultraviolet light onto the ceramic soft material printing material on the surface of the printing platform (3.1) according to the set printing path, so that the ceramic soft material printing material is ultraviolet light cured, the photocuring forming of a single layer of material is completed, and a cured green ceramic substrate is obtained; Step 5, microstructure processing of green ceramic substrate based on laser engraving: Control the printing platform (3.1) to move to the micro-processing and multi-material forming area along the X direction at the same height; control the pulsed laser (4.2) to generate a pulsed laser beam, which is transmitted to the laser processing head through a transmission optical fiber, and focused to etch on the surface of the cured green ceramic substrate, and microstructure processing is performed according to the etching width and thickness, to obtain a microstructure processed green ceramic substrate; Step 6, filling of metal conductive material: Control the pulse inkjet print head (4.3) and / or direct writing extrusion head (4.4) to fill liquid metal material or conductive paste into the laser processed microchannel of the microstructure processed green ceramic substrate, to fill the metal conductive material, and complete a single layer printing; Step 7, control the printing platform (3.1) to descend by one layer thickness, and then return to step 2 to perform composite multi-material fine printing of the next printing layer, and the process is repeated to finally form a functional device with a complex structure; The composite manufacturing equipment for printing functional devices in space environment has the following characteristics:

1. The overall main frame structure divides the composite forming platform into two parts, the left is the photocuring forming area, and the right is the micro-processing and multi-material forming area; the DLP light machine module is located above the photocuring forming area and is fixed on the overall frame, and the cured forming image is projected onto the surface of the printing platform by ultraviolet light, that is, the ultraviolet light is mainly projected by the digital processor to cure the forming material; 2. The printing platform moves downward layer by layer according to the control instruction, and cooperates with the paving system and the exposure system to complete the curing forming of the material; The printing platform subsystem includes a printing platform base, a detachable printing plate, a high-precision lead screw, a high-precision guide rail, a stepping motor, and an encoder; 3. A single-sided feeding mode is adopted, and the feeding mechanism is fixed on the left side of the printing platform; the feeding mechanism adopts a through-type piston feeding; due to the large vibration during launching, the feeding mechanism is designed with a releaseable protective cover, which can ensure that the material does not overflow during launching, and can also provide a good protection environment to avoid deterioration or hardening of the material; the feeding mechanism (2.1) includes a through-type stepping motor, an outer shell, and a protective cover; 4. The paving device in the feeding and paving subsystem, comprising high-precision guide rail, warped plate type paving knife holder, adjustable paving knife, electromagnetic suction plate; in the forming process, after each exposure, the printing platform moves down by the layer thickness, and the paving system completes the paving action; the structure of double scraper is adopted, the scraper is made of ceramic material, after the paving is completed, the electromagnetic suction plate switches the warped plate type knife holder, and prepares for the next paving; Specifically, the scraper moving device motor, scraper conveyor belt, scraper, scraper guide rail, and feeding mechanism form a high-precision feeding and scraper system, the special ceramic soft material is extruded through the automatic feeding device, and is uniformly and flatly paved on the printing platform through the micron-level precision scraper; the magnet suction plate type scraper can reciprocate, and the layer thickness precision is controllable; 5. The printing platform can reciprocate in the vertical direction through the Z-axis motor, and can reciprocate in the horizontal axis direction through the X-axis motor; the printing platform is designed with a quick release mechanism, and can meet the adhesion requirements of different materials on the substrate; The printing platform can move in the X direction and the Z direction, the printing platform can be quickly disassembled, and different material textures can be replaced; 6. Micro-processing and multi-material forming area, through the Y-phase gantry structure and the X-phase three-axis motion mechanism, three-dimensional motion of multi-process composite printing is realized, the repeated positioning accuracy is 5 μm, and the three-axis motion accuracy is 5 μm; 7. Pulse laser, pulse inkjet print head and direct writing extrusion head are installed on the X-axis through a sliding block; the X-axis further comprises a lead screw and a motor; The pulse inkjet print head and the direct writing extrusion head serve as multi-material print heads, can be switched according to the printing needs, and complete the printing of single material and composite material; The pulse laser, the pulse inkjet print head and the direct writing extrusion head cooperate to complete the manufacturing of composite process; 8. The laser processing head is fixed on the moving sliding table through the screw hole at the back of the micro scanning galvanometer; 9. The motor is controlled through the control system, then the movement of the printing nozzle is driven by the motor driving the lead screw, the movement of the cross beam is driven by the motor driving the lead screw, and the descending of the printing platform is driven by the motor driving the lead screw, so that the printing forming is realized layer by layer; 10. The in-situ measurement subsystem comprises a hardware system and a software system; the in-situ measurement subsystem functions to measure the laser etching and inkjet processing features online, transmit the collected optical image data to the background software for processing, intelligently determine the processing quality through a deep learning algorithm, calibrate the positions of various processing tools, compensate the position parameters through the motion control system, and ensure that the laser groove position and the inkjet position completely coincide; Therefore, the in-situ measurement subsystem realizes real-time feedback of the precision, and ensures the printing precision; 11. The pulse laser mainly comprises a laser and a laser processing head; the laser generates a pulse laser beam; the laser beam is transmitted to the laser processing head through a transmission optical fiber, and etches the surface of the printing piece after being focused by the laser processing head.

2. The method of claim 1, wherein the method is performed in a space-facing environment. In steps 5 and 6, the in-situ measurement subsystem (5) measures the laser etching and inkjet processing features online, and transmits the collected optical image data to the background software; The background software intelligently determines the processing quality through a deep learning algorithm; the positions between various processing tools are calibrated, and the position parameters are compensated through a motion control system to ensure that the laser slotting position and the ink jetting position completely coincide.

3. The method of claim 1, wherein the method is performed in a space-facing environment. The DLP light machine module (1) projects ultraviolet light vertically downward.

4. The method of claim 1, wherein the method is performed in a space-facing environment. The printing platform X-direction moving mechanism (3.2) comprises a printing platform connecting piece (3.2.1), a printing platform conveying belt (3.2.2), a printing platform guide rail (3.2.3) and a printing platform motor (3.2.4); The bottom of the printing platform (3.1) is slidably connected with the printing platform guide rail (3.2.3); the printing platform (3.1) is fixedly connected with the printing platform conveying belt (3.2.2) through the printing platform connecting piece (3.2.1); the printing platform motor (3.2.4) is connected with the printing platform conveying belt (3.2.2) and used for driving the printing platform conveying belt (3.2.2) to move along the X direction.

5. The method of claim 1, wherein the method is performed in a space-facing environment. The composite printing X-direction moving mechanism (4.1) comprises a multi-printing-head X-direction guide rail (4.1.1), a multi-printing-head control motor (4.1.2) and a multi-printing-head X-direction transmission mechanism (4.1.3); The multi-printing-head control motor (4.1.2) is used for driving the multi-printing-head X-direction transmission mechanism (4.1.3) to move along the X direction; the pulse laser (4.2), the pulse ink jet printing head (4.3) and the direct writing extrusion head (4.4) are fixedly connected with the multi-printing-head X-direction transmission mechanism (4.1.3); and the pulse laser (4.2), the pulse ink jet printing head (4.3) and the direct writing extrusion head (4.4) are slidably connected with the multi-printing-head X-direction guide rail (4.1.1).

Images