A lunar soil melting and forming device and method based on reflective light concentration

Abstract

The application discloses a lunar soil melting forming device and method based on reflective light concentration, belongs to the field of lunar soil in-situ printing, and comprises a rack, an optical light concentration system, a lunar soil processing system and a forming printing system, wherein the optical light concentration system, the lunar soil processing system and the forming printing system are on the rack, the optical light concentration system converges high-density sunlight to the forming printing system, and the lunar soil processing system transmits the processed lunar soil to the forming printing system. Compared with the prior art, the lunar soil used in the application accounts for 100%, and in-situ utilization of lunar resources can be realized. The sunlight is directly used for melting and sintering of the lunar soil, energy loss in energy conversion is avoided, and energy utilization rate is high. The angle of the reflective light concentrator is automatically adjusted in real time, and the reflective light concentrator can adapt to the change of the solar altitude angle. The reflective light concentrator has the characteristics of no dispersion, small focusing spot, high stability, small size and small mass, and can adapt to lunar surface vibration and extreme lunar surface environment.

Description

Technical Field

[0001] This invention relates to the field of in-situ printing of lunar soil, specifically to a lunar soil melting and molding apparatus and method based on reflective light focusing. Background Technology

[0002] With the advancement of science and technology, humanity is no longer content with brief stays in space, and various countries have successively launched research into establishing space research stations. As the closest celestial body to Earth, and possessing abundant mineral and energy resources, the Moon has become the primary target for related research. However, current Earth-Moon transportation costs are high and the transportation cycle is long. Utilizing only the resources carried on Earth is insufficient to complete the construction of a lunar research station; therefore, it is necessary to utilize the Moon's in-situ resources to make deep space exploration missions feasible.

[0003] In-situ lunar resource utilization utilizes lunar resources as raw materials, without the aid of auxiliary materials, through artificial conversion technologies to achieve the transformation and utilization of these materials. This approach can reduce dependence on Earth's resources, decrease Earth-Moon transportation costs, and improve the sustainability of related missions. In-situ lunar construction is a crucial research area within this field, laying the foundation for the construction of my country's lunar research station. Currently, the technologies proposed domestically and internationally for in-situ lunar construction mainly include selective microwave sintering, selective laser sintering / melting, stereolithography, binder spraying, selective solar sintering, and concrete contour forming.

[0004] The moon has abundant solar energy resources; existing data indicates that the solar energy density on the moon can reach 1.353 kW / m². 2 Furthermore, the Moon's thin atmosphere, free from clouds or fog that obstruct the sun, allows for a stable supply of solar energy. In summary, directly utilizing solar concentrating to melt and sinter lunar regolith, and developing corresponding integrated and modular in-situ lunar regolith printing devices, can enable the in-situ utilization and construction of lunar resources, providing technical support for sustainable deep space exploration missions. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a lunar soil melting and molding device and method based on reflective light concentration, which mainly includes a frame, an optical light concentration system, a lunar soil processing system, and a molding and printing system. The optical light concentration system, the lunar soil processing system, and the molding and printing system are located on the frame. The optical light concentration system concentrates high-density sunlight onto the molding and printing system, and the lunar soil processing system transfers the processed lunar soil to the molding and printing system.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] The first aspect of this application discloses a lunar soil melting and molding apparatus based on reflective focusing light, including a printing nozzle and an optical focusing system; the optical focusing system includes a rotatable rotating platform, a reflective focusing light source, a light receiver, and an optical fiber; the rotating platform is equipped with the rotatable reflective focusing light source; the light receiver is located at the focal point of the reflective focusing light source; the light receiver is connected to the printing nozzle through the optical fiber.

[0008] In some embodiments, the rotating platform is mounted on a frame; the rotating platform is rotatably connected to the frame; a connecting rod is rotatably connected to the rotating platform; an optical bracket is rotatably connected to the other end of the connecting rod; the reflective condenser and the light receiver are both fixedly connected to the optical bracket; and an optical sensor is fixedly mounted on the optical bracket.

[0009] In some embodiments, the connecting rod is rotatably connected to the optical support via hinge I; the rotating platform is rotatably connected to the connecting rod via hinge II.

[0010] In some embodiments, the connection point between the optical support and the connecting rod is located at the end of the optical support.

[0011] In some embodiments, a lunar soil treatment system is further included; the lunar soil treatment system includes a screening machine cylinder wall and a screen; the screen is fixedly installed on the screening machine cylinder wall; the screening machine cylinder wall has a waste outlet at the upper end of the screen; the screening machine cylinder wall has a discharge outlet at the lower end of the screen. 。

[0012] In some embodiments, the inclination angle between the screen and the cylinder wall of the powder screening machine is 30°.

[0013] In some embodiments, the system further includes a molding and printing system; the molding and printing system includes a column, an x-axis guide rail, a y-axis guide rail, a z-axis guide rail, and a printing substrate; the column is connected to the frame; the x-axis guide rail is fixedly connected to the column; the y-axis guide rail is slidably connected to the x-axis guide rail; the print head is slidably connected to the y-axis guide rail; the frame has a through hole at the bottom of the print head; the frame has the z-axis guide rail installed at the lower end of the through hole; and the printing substrate is slidably connected to the z-axis guide rail.

[0014] In some embodiments, the system includes a roller guide rail, a roller slider, and a roller; the roller guide rail is fixedly connected to the column; the roller slider is slidably connected to the roller guide rail; and the roller is rotatably connected to the roller slider.

[0015] In some embodiments, the printing substrate includes a side plate and a bottom plate; the side plate and the bottom plate are connected by a hinge III.

[0016] The second aspect of this application discloses a printing method including a lunar soil melting and molding apparatus based on reflective light concentration as described in the first aspect, characterized by comprising the following steps:

[0017] The lunar soil raw material is sieved, and the sieved lunar soil powder is transported to the printing substrate, and the lunar soil powder is spread and compacted.

[0018] Using optical sensors and servo motors to control the optical focusing system to target the sun, a reflective concentrator is used to focus sunlight, and optical fiber is used to transmit the sunlight to the print head;

[0019] The relative position of the print head and the printing substrate is adjusted by a three-axis drive mechanism, so that the light spot is focused on the surface of the lunar soil powder, and the energy and size of the light spot are adjusted.

[0020] The printing process parameters and motion path are set, and the three-axis drive mechanism drives the printing nozzle to move in a plane to complete the printing of a layer of lunar soil powder. The printing substrate moves down to the height of one layer of lunar soil powder.

[0021] Repeat the above steps until the sample printing is complete, then remove the sample.

[0022] The beneficial effects of this invention are:

[0023] The material used in this invention comprises 100% lunar regolith, enabling in-situ utilization of lunar resources. This solves the problems of Earth-Moon transportation costs and timelines, and improves the utilization rate of lunar resources. Directly utilizing sunlight to melt and sinter the lunar regolith eliminates energy conversion, avoiding energy loss during energy conversion and resulting in high energy utilization. Automatic real-time adjustment of the reflective concentrator's angle allows for excellent adaptation to changes in solar altitude angle, reducing the impact of environmental changes on printing and manufacturing. The light guide device uses flexible fiber optic components, offering a simple, flexible, and convenient structure for long-distance transmission, which helps reduce light intensity loss. The reflective concentrator eliminates dispersion and has a small focused spot. Compared to refractive concentrators, it features smaller size and mass, higher stability, and adaptability to lunar surface vibrations and extreme lunar environments. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a folding schematic diagram of the optical focusing system in this invention;

[0027] Figure 3 This is a schematic diagram of the optical focusing system in this invention.

[0028] Figure 4 This is an isometric view of the lunar soil treatment system in this invention;

[0029] Figure 5 This is an isometric view of the molding and printing system in this invention;

[0030] Figure 6 This is a structural diagram of the printhead in this invention;

[0031] Figure 7 This is a cross-sectional view of the ejection mechanism in the closed state of the present invention;

[0032] Figure 8 Open a cross-sectional view of the ejection mechanism in this invention.

[0033] The components corresponding to each number in the diagram are as follows:

[0034] In the diagram, 1-frame, 2-optical sensor, 3-hinge I, 4-connecting rod, 5-hinge II, 6-rotating platform, 7-off-axis parabolic mirror, 8-light receiver, 9-optical support, 10-optical fiber, 11-screening machine cylinder wall, 12-screen, 13-waste port, 14-discharge port, 15-screening machine support, 16-column, 17-x-guide rail, 18-y-guide rail, 19-printing nozzle, 20-roller guide rail, 21-roller slider, 22-roller, 23-z-guide rail, 24-printing substrate, 25-hinge III, 26-frame support. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] See Figure 1-8 This invention provides a lunar soil melting and molding device and method based on reflective light concentration, mainly comprising: a frame 1, an optical light concentration system, a lunar soil processing system, and a molding and printing system. The optical light concentration system, the lunar soil processing system, and the molding and printing system are mounted on the frame 1; the frame 1 is mounted on a frame support 26. The optical light concentration system concentrates high-density sunlight onto the molding and printing system, and the lunar soil processing system transfers the processed lunar soil to the molding and printing system.

[0039] The optical focusing system includes a rotating platform 6, a reflective condenser, a light receiver 8, and an optical fiber 10. The rotating platform 6 is rotatably connected to the frame 1. The reflective condenser is an off-axis parabolic mirror 7. The reflective condenser has no dispersion and a small focused spot. Compared with the refractive condenser, it has the advantages of smaller size and mass, and higher stability, and can adapt to lunar surface vibrations and extreme lunar environment. The off-axis parabolic mirror 7 can rotate relative to the rotating platform 6. The light receiver 8 is set at the focal point of the off-axis parabolic mirror 7 to realize the coupling between the light and the light receiver 8.

[0040] The optical fiber 10 connects the optical receiver 8 and the print head 19, and is used to transmit the high-density sunlight received by the off-axis parabolic mirror 7 from the optical receiver 8 to the print head 19; the optical fiber 10 is a multi-beam focusing optical fiber.

[0041] By changing the rotation angle of the rotating platform 6 and the rotation angle of the off-axis parabolic mirror 7 relative to the rotating platform 6, the spatial angle of the off-axis parabolic mirror 7 is changed, thereby achieving efficient convergence of sunlight and transmitting the converged sunlight to the printing nozzle 19 for melting and sintering of lunar soil.

[0042] In addition, the optical receiver 8 is designed for heat dissipation and a protective cover is installed on the outside of the optical receiver 8 to further reduce the impact of environmental factors such as space radiation on the optical receiver 8.

[0043] In some embodiments, the optical focusing system further includes an optical sensor 2, hinge I 3, connecting rod 4, hinge II 5, and optical support 9; the optical sensor 2 is used to automatically track the azimuth and elevation angle of sunlight, thereby adjusting the position of the off-axis parabolic mirror 7, keeping the angle of sunlight incident on the off-axis parabolic mirror 7 fixed, achieving efficient focusing of sunlight, and transmitting the focused sunlight to the printing nozzle 19 for melting and sintering of lunar soil.

[0044] The off-axis parabolic mirror 7 is fixed on the optical support 9 and moves with the optical support 9 to adjust the tilt angle and azimuth angle of the off-axis parabolic mirror 7. The off-axis parabolic mirror 7 is used to concentrate high-density sunlight as an energy source for the melting and sintering of lunar soil.

[0045] Hinge I3 is mounted on optical support 9, and hinge II5 is mounted on rotating platform 6. Hinge I3 and hinge II5 are connected by link 4. Hinge I3 and hinge II5 can be driven to rotate by servo motors. Rotating platform 6 can also be driven by servo motors. The motors are controlled by a light-tracking controller. Hinge I3, hinge II5 and link 4 together drive optical support 9 to move in order to track the solar altitude angle.

[0046] Optical sensor 2 is mounted on optical bracket 9. The receiving surface of optical sensor 2 is parallel to the receiving surface of off-axis parabolic mirror 7. Optical sensor 2 receives sunlight information and feeds it back to the tracking controller. The tracking controller sends a control signal to the servo motor. The servo motor controls the movement of hinge I 3, connecting rod 4, hinge II 5, and rotating platform 6, continuously adjusting the tilt angle and azimuth angle of off-axis parabolic mirror 7 so that off-axis parabolic mirror 7 always faces the sun and sunlight shines perpendicularly on off-axis parabolic mirror 7.

[0047] like Figure 2 , Figure 3 In the embodiment shown, hinge I3 is located at the end of the optical support 9; hinge I3, hinge II5 and connecting rod 4 jointly drive the optical support 9 to move, so that the optical support 9 is parallel to the rotating platform 6, and complete the folding of hinge I3, hinge II5, connecting rod 4 and optical support 9 to achieve the folded state, reducing the space occupied when not in operation.

[0048] In some embodiments, a lunar soil processing system is also included. This system includes a sieving mill cylinder wall 11, a screen 12, a waste outlet 13, a discharge outlet 14, and a sieving mill support 15. The system is used to sieve the lunar soil raw material collected by the robot, removing impurities and larger particles to ensure uniform particle size and guarantee the quality of the molten sample. The sieved lunar soil powder is then transported to the printing substrate 24, and the lunar soil waste is discharged outside the printing device. The sieving mill cylinder wall 11 is fixed to the sieving mill support 15, which is mounted on the frame 1. The screen 12 is mounted on the sieving mill cylinder wall 11. The mesh size of the screen 12 is set according to the particle size requirements of the molten and sintered lunar soil powder. A screen 12 with a corresponding mesh size is used for sieving to obtain lunar soil powder of the specified particle size, avoiding the introduction of large particles. Multiple screens 12 with different mesh sizes can be set for sieving lunar soil powder of different sizes, thereby facilitating the expansion of production scale and improving production efficiency. The screen 12 has a 30° tilt angle for discharging large particles of lunar soil to the waste inlet; the screen 12 can be used with a vibrating or centrifugal sieving mechanism to increase the sieving speed of lunar soil powder.

[0049] Waste outlet 13 is installed on the cylinder wall 11 of the powder screening machine, above the screen 12, and is used to discharge lunar soil waste outside the printing device. The lunar soil waste is large-particle lunar soil. Waste outlet 13 has a 30° inclination angle to discharge large-particle lunar soil outside the printing device.

[0050] The discharge port 14 is installed on the cylinder wall 11 of the powder sieving machine and is located below the screen 12. It is used to convey the sieved lunar soil powder to the printing substrate 24. The discharge port 14 has a 30° inclination angle to discharge the sieved lunar soil powder to the printing substrate 24.

[0051] In some embodiments, the molding and printing system includes a column 16, an x-guide rail 17, a y-guide rail 18, a print head 19, a z-guide rail 23, a printing substrate 24, and a hinge Ⅲ 25, used to spread and compact lunar soil powder. The print head 19 is driven to move in two dimensions relative to the printing substrate 24 by the x-guide rail 17 and the y-guide rail 18, and the print head 19 is driven to move in the z-direction relative to the printing substrate 24 by the z-guide rail 23. The lunar soil powder on the printing substrate 24 is heated by high-density focused sunlight until it melts and sinters, and then the printed sample is taken out.

[0052] The column 16 is fixed to the frame 1 and located above the frame 1; the column 16 is used to fix the x-guide rail 17; the x-guide rail 17 is located above the discharge port 14; the y-guide rail 18 is installed on the x-guide rail 17; the print head 19 is installed on the y-guide rail 18; the z-guide rail 23 is fixed to the frame 1 and located below the frame 1; the printing substrate 24 is installed on the z-guide rail 23; a through hole is provided between the printing substrate 24 and the print head 19;

[0053] The x-guide rail is used to control the x-direction movement of the y-guide rail 18 and the print head 19; the y-guide rail is used to control the y-direction movement of the print head 19; and the z-guide rail 23 is used to control the z-direction movement of the printing substrate 24 and the lunar soil powder on the printing substrate 24.

[0054] The three guide rails can be electric guide rails. The electric guide rails are driven by motors to move the components on the guide rails. A three-dimensional motion controller can be used to transmit commands to the motors. The motors drive the y-guide rail 18 and the print head 19 to move in the x-direction on the x-guide rail 17 according to the commands. The motors drive the print head 19 to move in the y-direction on the y-guide rail 18 according to the commands. The motors drive the printing substrate 24 to move in the z-direction on the z-guide rail 23 according to the commands.

[0055] The printhead 19 is used to heat the lunar soil powder on the printing substrate 24 with high-density focused sunlight conducted by the optical fiber 10 until it melts and sinters. The printhead 19 is located above the discharge port 14. The printhead 19 is connected to the optical fiber 10, as shown below. Figure 6 As shown, the three-dimensional motion controller, acting as the controller, drives the print head 19 to move in the y-direction along the y-guide rail 18 according to instructions via a motor. The high-density light spot of the print head 19 is focused on the upper surface of the lunar soil powder on the printing substrate 24, and this is accomplished by driving the printing substrate 24 and the lunar soil powder on the printing substrate 24 to move in the z-direction.

[0056] In some embodiments, the printing substrate 24 includes a side plate and a bottom plate; the side plate and the bottom plate are connected by a hinge III 25; the hinge III 25 is used to control the opening and closing state of the printing substrate 24, causing the printing substrate 24 to tilt at a certain angle, such as... Figure 7 , Figure 8 As shown, this allows the molded sample to be moved outside the printing device; hinge Ⅲ25 can be rotated using a servo motor.

[0057] In some embodiments, the molding and printing system further includes a roller guide 20, a roller slider 21, and a roller 22; the roller guide 20 is fixed to the column 16 and is used to control the x-direction movement of the roller slider 21 and the roller 22. The roller guide 20 is located below the discharge port 14. The roller guide 20 is located above the frame. The roller slider 21 is mounted on the roller guide 20 and is used to drive the roller 22 to move in the x-direction.

[0058] Roller 22 is mounted on roller slider 21 and is used to spread and compact the lunar soil powder on the printing substrate 24, reducing the gaps between the lunar soil powder particles. This ensures that the lunar soil is heated evenly during the melting process, thereby improving the density and strength of the in-situ melt-molded lunar soil and guaranteeing the quality of the molded sample after subsequent melt sintering. This is because gaps between the lunar soil powder particles can affect the quality of the in-situ melt-molded lunar soil, leading to insufficient strength of the finished product or even defects such as cracks.

[0059] Roller 22 and roller slider 21 are connected by a hinge, and roller 22 can rotate around its own axis. Roller 22 is located above printing substrate 24; roller guide rail 20 can be an electric slide rail, and a three-dimensional motion controller acts as the controller to drive roller slider 21 to move in the x-direction on roller guide rail 20 according to instructions via a motor.

[0060] In this application, a fixed connection refers to a connection where, after the parts or components are installed, there is no relative movement. Common examples include using screws, splines, wedges, etc., to fix parts together. This type of connection can be disassembled during maintenance without damaging the parts; it can also be called a detachable fixed connection. Other methods include welding, riveting, and tenon joints. These methods require forging, sawing, or oxy-acetylene cutting for disassembly during maintenance or replacement, so the parts generally cannot be reused. In this application, a rotating connection refers to a connection where, after the parts or components are installed, the parts rotate relative to the fixed part. A common form is a relationship where a bearing is mounted on the fixed part, with the part mounted on the inner or outer ring of the bearing, allowing the bearing to achieve rotational movement. In this application, a sliding connection refers to a connection where, after the parts or components are installed, the parts can move on the fixed part.

[0061] This application also proposes a printing method for a lunar soil melting and molding device based on reflective light focusing, comprising: using an off-axis parabolic mirror 7 to efficiently focus sunlight; using optical fibers to transmit high-density focused sunlight to a printing nozzle 19; driving the printing nozzle 19 to move in a planar manner through a three-axis drive device to heat the lunar soil powder until it melts and sinters; and then feeding and spreading powder layer by layer to achieve in-situ resource utilization of lunar soil by directly using concentrated sunlight to melt and sinter it. Specifically, the method includes the following steps:

[0062] Step 1: The lunar soil processing system sieves the lunar soil raw material and transports the sieved lunar soil powder to the printing substrate 24;

[0063] Step 2: Use roller 22 to spread and compact the lunar soil powder;

[0064] Step 3: Using optical sensor 2 and servo motor to control the optical focusing system to target the sun, the off-axis parabolic mirror is used to efficiently focus the sunlight, and optical fiber is used to transmit the high-density sunlight to the print head;

[0065] Step 4: Adjust the position of the printing substrate 24 so that the light spot is focused on the upper surface of the lunar soil powder. Adjust the energy and size of the light spot by adjusting the angle of the off-axis parabolic mirror 7 that is incident on the sunlight.

[0066] Step 5: Set the printing process parameters and motion path. The forming printing system drives the printing nozzle to move in a plane to complete the printing of this layer of lunar soil powder. The printing substrate 24 moves downward by the height of one layer of lunar soil powder.

[0067] Step Six: Repeat Step One and Step Five until the printing and manufacturing of the sample is completed.

[0068] Step 7: Remove the molded sample from the printing device.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A lunar soil melting and molding device based on reflective light concentration, characterized in that, It includes a printhead and an optical focusing system; the optical focusing system includes a rotatable rotating platform, a reflective condenser, a light receiver, and an optical fiber; the rotating platform is equipped with the rotatable reflective condenser; The light receiver is positioned at the focal point of the reflective concentrator; The optical receiver is connected to the print head via the optical fiber; The rotating platform is mounted on the frame; the rotating platform is rotatably connected to the frame; a connecting rod is rotatably connected to the rotating platform; an optical bracket is rotatably connected to the other end of the connecting rod; the reflective condenser and the light receiver are both fixedly connected to the optical bracket; an optical sensor is fixedly mounted on the optical bracket. It also includes a molding and printing system; the molding and printing system includes a column, an x-axis guide rail, a y-axis guide rail, a z-axis guide rail, and a printing substrate; the column is connected to the frame; the x-axis guide rail is fixedly connected to the column; the y-axis guide rail is slidably connected to the x-axis guide rail; the print head is slidably connected to the y-axis guide rail; the frame has a through hole at the bottom of the print head; the frame is equipped with the z-axis guide rail at the lower end of the through hole; the printing substrate is slidably connected to the z-axis guide rail; It includes a roller guide rail, a roller slider, and a roller; the roller guide rail is fixedly connected to the column; the roller slider is slidably connected to the roller guide rail; the roller and the roller slider are rotatably connected. The reflective condenser is an off-axis parabolic mirror; the connecting rod is rotatably connected to the optical support via hinge I; the rotating platform is rotatably connected to the connecting rod via hinge II; the connection point between the optical support and the connecting rod is located at the end of the optical support; the receiving surface of the optical sensor is parallel to the receiving surface of the off-axis parabolic mirror; hinge I, hinge II, and the connecting rod together drive the optical support to move, making the optical support parallel to the rotating platform, completing the folding of hinge I, hinge II, the connecting rod, and the optical support, achieving a retracted state.

2. The lunar soil melting and molding device based on reflective focusing light according to claim 1, characterized in that, It also includes a lunar soil treatment system; the lunar soil treatment system includes a screening machine cylinder wall and a screen; the screen is fixedly installed on the screening machine cylinder wall; the screening machine cylinder wall is provided with a waste outlet at the upper end of the screen; the screening machine cylinder wall is provided with a discharge outlet at the lower end of the screen.

3. The lunar soil melting and molding device based on reflective focusing light according to claim 2, characterized in that, The inclination angle between the screen and the cylinder wall of the powder screening machine is 30°.

4. The lunar soil melting and molding device based on reflective focusing light according to claim 2, characterized in that, The printing substrate includes a side plate and a bottom plate; the side plate and the bottom plate are connected by a hinge III.

5. A printing method for a lunar soil melting and molding device based on reflective light concentration as described in any one of claims 1-4, characterized in that, Includes the following steps: The lunar soil raw material is sieved, and the sieved lunar soil powder is transported to the printing substrate, and the lunar soil powder is spread and compacted. Using optical sensors and servo motors to control the optical focusing system to target the sun, a reflective concentrator is used to focus sunlight, and optical fiber is used to transmit the sunlight to the print head; The position of the print head is adjusted by a three-axis drive mechanism so that the light spot is focused on the surface of the lunar soil powder, and the energy and size of the light spot are adjusted. The printing process parameters and motion path are set, and the three-axis drive mechanism drives the printing nozzle to move in a plane to complete the printing of a layer of lunar soil powder. The printing substrate moves down to the height of one layer of lunar soil powder. Repeat the above steps until the sample printing is complete, then remove the sample.

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