3D printing forming method and device for multilayer resonant metamaterial wave absorber

Abstract

The invention relates to the technical field of 3D printing, and discloses a 3D printing forming method and device for a multilayer resonant metamaterial absorber, the 3D printing forming device comprises a workbench, an XY-axis moving mechanism is arranged on one side of the upper end of the workbench, and the XY-axis moving mechanism is used for adjusting the positions of a printing head on the XY-axis moving mechanism in the X-axis direction and the Y-axis direction; a driving mechanism, a Z-axis moving mechanism and a printing substrate assembly are arranged in the middle of the upper end of the workbench. The printing substrate assembly is fixedly connected with the top of the Z-axis moving mechanism through the quick disassembly assembly, and quick disassembly and assembly of the printing substrate assembly can be achieved; during 3D printing, the Z-axis moving mechanism is used for enabling cooling liquid in the corrugated liquid storage hose to circularly flow in the heat dissipation circulating pipe through the pipeline system so as to achieve heat dissipation of the printing substrate assembly, in this way, circulation of the cooling liquid is automatically achieved, the circulation speed is increased, and the heat dissipation efficiency is improved. Therefore, the multilayer resonant metamaterial wave-absorbing body attached to the upper end surface of the cover plate can be quickly cooled and formed.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, specifically to a method and apparatus for 3D printing a multilayer resonant metamaterial absorber. Background Technology

[0002] With the rapid development of technology, 3D printing, as an emerging manufacturing technology, is gradually changing traditional production models. It can quickly and accurately manufacture objects of various complex shapes by layer-by-layer material deposition, and is widely used in many fields such as aerospace, automotive manufacturing, medical, and electronics. In these fields, the demand for materials with special properties is increasing, and multilayer resonant metamaterial absorbers are one such example.

[0003] Multilayer resonant metamaterial absorbers, with their unique structure and material properties, can efficiently absorb electromagnetic waves within a specific frequency range, making them valuable for applications in electromagnetic protection, radar stealth, and communication equipment. For example, in the aerospace field, they can be used to reduce the radar cross-section of aircraft, improving their stealth performance; in electronic equipment, they can effectively reduce electromagnetic interference, enhancing equipment stability and reliability.

[0004] Multilayer resonant metamaterial absorbers are special absorbing structures based on metamaterial design. Metamaterials refer to artificial composite structures or composite materials possessing extraordinary physical properties not found in natural materials. Multilayer resonant metamaterial absorbers utilize a carefully designed multilayer structure where each layer works in synergy, leveraging the resonant characteristics of different layers for electromagnetic waves of different frequencies to achieve efficient absorption of broadband electromagnetic waves. Each layer has a specific geometry, size, and material properties. When electromagnetic waves are incident, each layer resonates at its corresponding frequency, converting the energy of the electromagnetic wave into other forms of energy (such as heat), thus achieving the purpose of absorption. Compared to single-layer absorbers, this multilayer structure significantly broadens the absorption bandwidth and improves absorption performance.

[0005] Several challenges exist when applying 3D printing technology to the manufacture of multilayer resonant metamaterial microwave absorbers. Existing 3D printing equipment faces the critical issue of heat dissipation during the printing process. Poor heat dissipation of the printing substrate assembly leads to slow cooling of the formed absorber, causing deformation or internal stress concentration, thus reducing its performance. Furthermore, existing 3D printing equipment is not convenient for installing and disassembling the printing substrate assembly, increasing operational difficulty and time costs, and hindering production efficiency. Therefore, we introduce a 3D printing method and apparatus for multilayer resonant metamaterial microwave absorbers. Summary of the Invention

[0006] The purpose of this invention is to provide a method and apparatus for 3D printing of multilayer resonant metamaterial absorbers to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A 3D printing molding device for a multilayer resonant metamaterial absorber includes a worktable. An XY axis moving mechanism is provided on one side of the upper end of the worktable. The XY axis moving mechanism is used to adjust the position of the print head on the worktable in the X and Y axis directions. The upper middle part of the worktable is provided with a drive mechanism, a Z-axis moving mechanism and a printing substrate assembly; After the printing substrate assembly is connected and fixed to the top of the Z-axis moving mechanism using a quick-release assembly, the piping system on the Z-axis moving mechanism is connected to the heat dissipation circulation pipe built into the printing substrate assembly. The workbench is also equipped with two sets of corrugated liquid storage hoses symmetrically arranged front and back, and the inner ends of the corrugated liquid storage hoses are connected to the bottom of the pipeline system. When the print head extrudes printing material onto the upper surface of the printing substrate assembly, the drive mechanism drives the Z-axis moving mechanism to reciprocate in the Z-axis direction to achieve 3D printing. At the same time, the Z-axis moving mechanism is used to circulate the coolant in the corrugated liquid storage hose through the pipeline system in the heat dissipation circulation pipe to achieve heat dissipation for the printing substrate assembly.

[0008] Preferably, the XY axis moving mechanism includes a Y-axis stand fixed to one side of the upper end of the worktable, a first servo motor, and an X-axis cross stand fixed on the Y-axis stand by a vertical sliding bracket; The print head is fixed on the transverse sliding bracket on the X-axis horizontal support; The first lead screw at the top of the first servo motor passes through the vertical sliding bracket; A second servo motor is fixed on the vertical sliding frame. The second servo motor is used to drive the transmission belt on the X-axis horizontal seat to rotate, and the horizontal sliding frame is fixed to the transmission belt.

[0009] Preferably, the vertical sliding frame includes a first slide and a second slide located on both sides of the Y-axis support, and a first roller and a second roller are movably connected between the first slide and the second slide, with the first roller and the second roller closely attached to the side wall of the Y-axis support; The second servo motor is fixed on the side between the first and second carriages, the first lead screw passes through the first carriage, and the X-axis cross seat is fixed on the outside of the second carriage; The outer sides of both ends of the X-axis horizontal seat are movably connected to the first pulley and the second pulley by connecting plates, and the transmission belt is connected between the first pulley and the second pulley; The transverse sliding bracket is movably connected to a third roller and a fourth roller on its side, with the third roller and the fourth roller closely attached to the side wall of the X-axis transverse seat.

[0010] Preferably, the print head is provided with a feed pipe and a conical extrusion head connected to the bottom of the feed pipe, and a cooling fan is also provided on the side of the print head.

[0011] Preferably, the drive mechanism includes a third servo motor fixed at the front end of the worktable and a third lead screw connected to the output end of the third servo motor, wherein the third lead screw extends into a groove in the middle of the upper part of the worktable; The Z-axis moving mechanism includes a movable seat that slides in the slide groove, a limiting frame on both sides of the upper end of the movable seat, a support plate set on the top of the limiting frame, and a support spring set on the top of both ends of the support plate. The middle of the movable seat is penetrated by a third lead screw, and the corrugated liquid storage hose is sleeved on the outside of both ends of the third lead screw; The outer side of the limiting frame slides into the limiting grooves on both sides of the worktable.

[0012] Preferably, the quick-release assembly includes a rectangular hollow stand at the upper center of the movable base, a stop block connected by a pin in the slot on the upper side of the rectangular hollow stand, a first return spring inside the rectangular hollow stand, and a lifting block assembly inserted into the rectangular hollow stand at the bottom. The bottom inner side of the abutment block is provided with a connecting arm, and the inner end of the connecting arm is provided with an abutment ball. The top of the first reset spring abuts against the bottom of the connecting arm. The lifting block assembly includes a bottom limiting block inserted into the rectangular hollow base and a top limiting block fixed by a column at the upper middle part of the bottom limiting block. The bottom limiting block sits on the abutment ball.

[0013] Preferably, the piping system includes two sets of top-inserted vertical pipes provided at the upper end of the top limiting block, two sets of connecting hoses provided at the lower end of the bottom limiting block, and bottom-inserted horizontal pipes provided at the front and rear ends of the movable seat, wherein the connecting hoses are located inside the first reset spring; The top of the connecting hose is connected to the corresponding top insertion vertical pipe through the bottom limiting block, the column, and the upper channel inside the top limiting block. The bottom of the connecting hose is connected to the corresponding bottom insertion horizontal pipe through the lower channel inside the movable seat, and the bottom insertion horizontal pipe is inserted into the corresponding corrugated liquid storage hose.

[0014] Preferably, the printing substrate assembly includes a base plate for mounting the heat dissipation circulation pipe, a cover plate provided on the top of the base plate, a rectangular frame provided in the middle of the lower end of the base plate, a locking block that slides between two sets of ear plates on the side of the rectangular frame, a vertical plate provided at the bottom of the outer end of the locking block, and a second reset spring connecting the inner wall of the vertical plate and the outer wall of the rectangular frame. The two sets of ear plates are located on both sides of the insertion slot on the side of the rectangular frame, and the inner end of the card block is located in the insertion slot; The card block is provided with sliders on both sides, and the sliders slide into the rectangular through slots on the ear plate; After the top limiting block is inserted into the rectangular frame, the top of the top insertion vertical pipe is inserted into the interior of both ends of the heat dissipation circulation pipe.

[0015] This invention also provides a method for forming a 3D printing device for a multilayer resonant metamaterial absorber, specifically including the following steps: S1. Connect and fix the printing substrate assembly to the top of the Z-axis moving mechanism via the quick-release assembly, and at the same time, the heat dissipation circulation pipe is connected to the corrugated liquid storage hose through the pipe system on the Z-axis moving mechanism. S2. When the print head extrudes printing material onto the upper surface of the printing substrate assembly, the drive mechanism drives the Z-axis moving mechanism to perform reciprocating motion in the Z-axis direction to achieve 3D printing. S3. At the same time, the Z-axis moving mechanism is used to circulate the coolant in the corrugated liquid storage hose through the pipeline system in the heat dissipation circulation pipe to achieve heat dissipation of the printing substrate assembly.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The printing substrate assembly of the present invention adopts a quick-release assembly and is fixedly connected to the top of the Z-axis moving mechanism, which can realize the quick disassembly and installation of the printing substrate assembly; when the printing head extrudes printing material onto the upper surface of the printing substrate assembly, the drive mechanism drives the Z-axis moving mechanism to perform reciprocating motion in the Z-axis direction to realize 3D printing. At the same time, the Z-axis moving mechanism is used to circulate the coolant in the corrugated liquid storage hose through the pipeline system in the heat dissipation circulation pipe to realize heat dissipation of the printing substrate assembly. This automatically realizes the circulation of coolant and accelerates the circulation speed, so that the multilayer resonant metamaterial wave absorber attached to the upper surface of the cover plate can be quickly cooled and formed. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a first three-dimensional structural schematic diagram of the XY-axis moving mechanism of the present invention; Figure 3 This is a schematic diagram of the second three-dimensional structure of the XY axis moving mechanism of the present invention; Figure 4 This is a schematic diagram of the third three-dimensional structure of the XY axis moving mechanism of the present invention; Figure 5 A three-dimensional structural diagram of the printing substrate assembly, Z-axis moving mechanism, and corrugated liquid storage hose of the present invention; Figure 6 A three-dimensional structural diagram of the worktable, Z-axis moving mechanism and quick-release assembly of the present invention; Figure 7 A three-dimensional structural diagram of the rectangular hollow support and movable base of the present invention; Figure 8 A three-dimensional structural diagram of the Z-axis moving mechanism and quick-release assembly of the present invention; Figure 9 For the present invention Figure 8 A schematic diagram of the cross-sectional structure; Figure 10 This is a schematic diagram of the structure of the abutment block of the present invention; Figure 11 This is a schematic diagram of the connection between the bottom limiting block and the top limiting block of the present invention; Figure 12 This is a three-dimensional structural diagram of the connection between the base plate and the rectangular frame of the present invention; Figure 13 This is an exploded structural diagram of the connection between the cover plate and the bottom plate of the present invention; Figure 14 This is a cross-sectional view of the connection between the base plate and the rectangular frame of the present invention; Figure 15 For the present invention Figure 14 Enlarged structural diagram at point A in the middle; Figure 16 This is a three-dimensional structural diagram of the printing substrate assembly of the present invention; Figure 17 For the present invention Figure 16 Enlarged structural diagram at point B; Figure 18 This is a cross-sectional view of the overall printed substrate assembly of the present invention; Figure 19 For the present invention Figure 18 Enlarged structural diagram at point C; Figure 20 This is a schematic diagram of the structure of the card block of the present invention; Figure 21 For the present invention Figure 5 Overall sectional structural schematic diagram; Figure 22 For the present invention Figure 21 Enlarged structural diagram at point D.

[0018] In the diagram: 1. XY axis moving mechanism; 101. Y-axis support; 102. First carriage; 103. Second carriage; 104. Connecting plate; 105. X-axis cross seat; 106. Cooling fan; 107. Print head; 108. First pulley; 109. Transmission belt; 110. Horizontal sliding frame; 111. Third roller; 112. First roller; 113. Second roller; 114. First servo motor; 115. Fourth roller; 116. Second servo motor; 117. First lead screw; 118. Second pulley; 119. Feed pipe; 2. Worktable; 201. Limiting groove; 202. Slide groove; 3. Support leg; 4. Printing substrate assembly; 401. Base plate; 402. Cover plate; 403. Rectangular frame; 404. Heat dissipation circulation. 405. Ring tube; 406. Second return spring; 407. Insertion slot; 408. Ear plate; 409. Rectangular through slot; 410. Locking block; 411. Slider; 5. Third servo motor; 501. Third lead screw; 6. Z-axis moving mechanism; 601. Moving seat; 602. Limiting frame; 603. Support plate; 604. Support spring; 7. Corrugated liquid storage hose; 8. Quick release assembly; 801. Rectangular hollow stand; 802. Abutment block; 803. Bottom limiting block; 804. Top limiting block; 805. Slot; 806. First return spring; 807. Pin shaft; 808. Abutment ball; 809. Connecting arm; 810. Column; 9. Bottom insert horizontal tube; 10. Top insert vertical tube; 11. Connecting hose. Detailed Implementation

[0019] 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.

[0020] Example: Please see Figure 1-22 The present invention provides a technical solution: A multi-layer resonant metamaterial wave absorber 3D printing molding device includes a worktable 2, a support leg 3 at the bottom of the worktable 2, and an XY axis moving mechanism 1 on one side of the upper end of the worktable 2. The XY axis moving mechanism 1 is used to adjust the position of the print head 107 on the worktable 2 in the X and Y axis directions. like Figure 2-4 As shown, the XY axis moving mechanism 1 includes a Y-axis stand 101 fixed to one side of the upper end of the worktable 2, a first servo motor 114, and an X-axis cross stand 105 fixed on the Y-axis stand 101 by a vertical sliding bracket. The print head 107 is fixed on the transverse sliding bracket 110 on the X-axis horizontal support 105; The first lead screw 117 at the top of the first servo motor 114 passes through the vertical sliding bracket; The first servo motor 114 can be a Siemens servo motor (model 1FL6062-1AC61-2LH1 or 1FL6061-1AC61-2LA1), a Mitsubishi servo motor (model Mitsubishi HC-SFS202 or Mitsubishi HG-SN302BJ-S100), or other models that meet the usage requirements. The PLC controller controls the first servo motor 114 to work, so that the first lead screw 117 drives the vertical sliding frame to move up and down, and realizes the adjustment of the vertical height of the X-axis horizontal seat 105 and the print head 107 on the vertical sliding frame.

[0021] A second servo motor 116 is fixed on the vertical sliding frame. The second servo motor 116 is used to drive the transmission belt 109 on the X-axis horizontal seat 105 to rotate, and the horizontal sliding frame 110 is fixed to the transmission belt 109. The outer sides of both ends of the X-axis horizontal seat 105 are movably connected to the first pulley 108 and the second pulley 118 by connecting plates 104, and the transmission belt 109 is connected between the first pulley 108 and the second pulley 118. The second servo motor 116 can be a Siemens servo motor (model 1FL6062-1AC61-2LH1 or 1FL6061-1AC61-2LA1), a Mitsubishi servo motor (model Mitsubishi HC-SFS202 or Mitsubishi HG-SN302BJ-S100), or other models that meet the usage requirements. The PLC controller controls the second servo motor 116 to work. The second servo motor 116 drives the transmission belt 109 to rotate through the second pulley 118, so that the transmission belt 109 drives the print head 107 to move along the X-axis direction of the X-axis horizontal seat 105 through the transverse sliding bracket 110, thereby adjusting the position of the print head 107 above the printing substrate assembly 4.

[0022] The vertical sliding frame includes a first slide 102 and a second slide 103 located on both sides of the Y-axis support 101. A first roller 112 and a second roller 113 are movably connected between the first slide 102 and the second slide 103. The first roller 112 and the second roller 113 are in close contact with the side wall of the Y-axis support 101. This arrangement makes the vertical sliding frame move more smoothly up and down (i.e., in the Y-axis direction) along the Y-axis support 101. The second servo motor 116 is fixed on the side between the first slide 102 and the second slide 103, the first lead screw 117 passes through the first slide 102, and the X-axis cross seat 105 is fixed on the outside of the second slide 103.

[0023] The transverse sliding bracket 110 is movably connected to the side by a third roller 111 and a fourth roller 115. The third roller 111 and the fourth roller 115 are in close contact with the side wall of the X-axis horizontal seat 105. This arrangement makes the transverse sliding bracket 110 and the print head 107 move more smoothly in the X-axis direction along the X-axis horizontal seat 105. The printhead 107 is equipped with a feed tube 119 and a conical extrusion head connected to the bottom of the feed tube 119. A cooling fan 106 is also provided on the side of the printhead 107. The cooling fan 106 is a Delta AFB0612HH model, a Sunon MF12025S model, or another model that meets the usage requirements. The cooling fan 106 operates to cool the printing material passing through the connection between the feed pipe 119 and the conical extrusion head.

[0024] The upper middle part of the worktable 2 is equipped with a drive mechanism, a Z-axis moving mechanism 6, and a printing substrate assembly 4; like Figure 21 As shown, the drive mechanism includes a third servo motor 5 fixed at the front end of the worktable 2 and a third lead screw 501 connected to the output end of the third servo motor 5. The third lead screw 501 extends into the slide groove 202 in the middle of the upper end of the worktable 2. The middle of the movable seat 601 is pierced by the third lead screw 501.

[0025] The third servo motor 5 can be a Siemens servo motor (model 1FL6062-1AC61-2LH1 or 1FL6061-1AC61-2LA1), a Mitsubishi servo motor (model Mitsubishi HC-SFS202 or Mitsubishi HG-SN302BJ-S100), or other models that meet the usage requirements. The PLC controller controls the third servo motor 5 to work. The third servo motor 5 drives the moving seat 601 to reciprocate along the slide groove 202 in the Z-axis direction (i.e., the front-back direction) through the third lead screw 501, thereby realizing the front-back movement of the printing substrate assembly 4 on the top of the Z-axis moving mechanism 6.

[0026] like Figure 6 As shown, the Z-axis moving mechanism 6 includes a movable seat 601 that slides in the slide groove 202, a limiting frame 602 on both sides of the upper end of the movable seat 601, a support plate 603 provided on the top of the limiting frame 602, and a support spring 604 provided on the top of both ends of the support plate 603. After the printing substrate assembly 4 is installed, the lower end of the base plate 401 of the printing substrate assembly 4 rests on the top of the support spring 604.

[0027] The outer side of the limiting frame 602 is slidably connected to the limiting grooves 201 on both sides of the worktable 2. In this way, when the third servo motor 5 drives the moving seat 601 to reciprocate along the sliding groove 202 in the Z-axis direction (i.e., the front-back direction) via the third lead screw 501, it can further ensure that the moving seat 601 and the printing substrate assembly 4 move smoothly.

[0028] like Figure 7 , 8 As shown in 9, 10, and 22, the quick-release assembly 8 includes a rectangular hollow stand 801 located at the middle of the upper end of the movable base 601, an abutment block 802 connected by a pin 807 in the slot 805 on the upper side of the rectangular hollow stand 801, a first reset spring 806 located inside the rectangular hollow stand 801, and a lifting block assembly inserted into the rectangular hollow stand 801 at the bottom. A connecting arm 809 is provided on the inner side of the bottom of the abutment block 802, and an abutment ball 808 is provided on the inner end of the connecting arm 809. The top of the first return spring 806 abuts against the bottom of the connecting arm 809. In the initial state, under the elastic force of the first return spring 806 on the connecting arm 809, the abutment block 802 rotates and opens about the pin 807 as the center (e.g., Figure 8 (As shown).

[0029] like Figure 11 As shown, the lifting block assembly includes a bottom limiting block 803 inserted into the rectangular hollow base 801 and a top limiting block 804 fixed at the upper middle part of the bottom limiting block 803 by a column 810.

[0030] The bottom limiting block 803 rests on the abutment ball 808. After the abutment block 802 rotates and opens around the pin 807, the abutment ball 808 lifts the bottom limiting block 803, causing it to move upward along the rectangular slot inside the rectangular hollow base 801. This causes the top limiting block 804 to extend out of the rectangular hollow base 801, reaching its highest position (e.g., ...). Figure 9 (As shown).

[0031] After the printing substrate assembly 4 is connected and fixed to the top of the Z-axis moving mechanism 6 via the quick-release assembly 8, the piping system on the Z-axis moving mechanism 6 is connected to the heat dissipation circulation pipe 404 built into the printing substrate assembly 4. The workbench 2 is also equipped with two sets of corrugated liquid storage hoses 7 symmetrically arranged front and back, and the inner end of the corrugated liquid storage hoses 7 is connected to the bottom of the pipeline system; like Figure 9 , 11As shown, the piping system includes two sets of top-inserted vertical pipes 10 provided at the upper end of the top limiting block 804, two sets of connecting hoses 11 provided at the lower end of the bottom limiting block 803, and bottom-inserted horizontal pipes 9 provided at the front and rear ends of the movable seat 601. The connecting hoses 11 are located inside the first reset spring 806. The top of the connecting hose 11 is connected to the corresponding top insertion vertical pipe 10 through the upper channel inside the bottom limiting block 803, the column 810 and the top limiting block 804. The bottom of the connecting hose 11 is connected to the corresponding bottom insertion horizontal pipe 9 through the lower channel inside the movable seat 601, and the bottom insertion horizontal pipe 9 is inserted into the corresponding corrugated liquid storage hose 7. Furthermore, the corrugated liquid storage hose 7 is fitted on the outer sides of both ends of the third screw 501 (e.g. Figure 21 As shown), the corrugated liquid storage hose 7 has a central hole that is sleeved on the outside of the third lead screw 501.

[0032] like Figure 12-19 As shown, the printing substrate assembly 4 includes a base plate 401 for mounting the heat dissipation circulation pipe 404, a cover plate 402 provided on the top of the base plate 401, a rectangular frame 403 provided in the middle of the lower end of the base plate 401, a locking block 409 that slides between two sets of ear plates 407 on the side of the rectangular frame 403, a vertical plate 411 provided at the bottom of the outer end of the locking block 409, and a second reset spring 405 connecting the inner wall of the vertical plate 411 and the outer wall of the rectangular frame 403. The two sets of ear plates 407 are located on both sides of the insertion slot 406 on the side of the rectangular frame 403, and the inner end of the locking block 409 is located inside the insertion slot 406. The card block 409 has sliders 410 on both sides, and the sliders 410 slide in the rectangular through slots 408 on the ear plate 407. In the initial state, under the elastic force of the second reset spring 405 on the vertical plate 411, the slider 410 on the locking block 409 moves outward along the rectangular through groove 408 until the slider 410 moves to the outer end of the rectangular through groove 408. At this time, the inner end of the locking block 409 retracts from the inside of the rectangular frame 403 into the insertion groove 406.

[0033] After the top limiting block 804 is inserted into the rectangular frame 403, the top insertion vertical tube 10 is inserted into the interior of both ends of the heat dissipation circulation tube 404, and then the cover plate 402 of the printing substrate assembly 4 is pressed down, so that the printing substrate assembly 4 moves downward. At this time, under the pressure of the printing substrate assembly 4, the top limiting block 804, the column 810 and the bottom limiting block 803 move downward as a whole. The bottom limiting block 803 moves downward along the rectangular slot inside the rectangular hollow stand 801. Since the bottom limiting block 803 is located on the top of the abutment ball 808, the abutment block 802 rotates and closes around the pin 807 until the lower end of the rectangular frame 403 contacts the upper end of the rectangular hollow stand 801. When the abutment block 802 rotates and closes, the upper inner wall of the abutment block 802 contacts the vertical plate 411, and the abutment block 802 abuts against the vertical plate 411 inward. The vertical plate 411 overcomes the elastic force of the second reset spring 405, so that the inner end of the locking block 409 passes through the insertion groove 406 and extends into the rectangular frame 403 until the upper end of the locking block 409 is locked at the bottom of the top limiting block 804, thereby realizing the installation and fixation of the printing substrate assembly 4.

[0034] When it is necessary to disassemble the printing substrate assembly 4, simply pull the printing substrate assembly 4 upwards. During the upward pulling process, the abutment block 802, the locking block 409, the top limiting block 804, the column 810, and the bottom limiting block 803 move and reset to their initial state as a whole, thus achieving quick disassembly of the printing substrate assembly 4.

[0035] When the print head 107 extrudes printing material onto the upper surface of the printing substrate assembly 4, the drive mechanism drives the Z-axis moving mechanism 6 to perform reciprocating motion in the Z-axis direction to achieve 3D printing. At the same time, the Z-axis moving mechanism 6 is used to circulate the coolant in the corrugated liquid storage hose 7 through the pipeline system in the heat dissipation circulation pipe 404 to achieve heat dissipation for the printing substrate assembly 4.

[0036] This invention also provides a method for forming a 3D printing device for a multilayer resonant metamaterial absorber, specifically including the following steps: S1. The printing substrate assembly 4 is connected and fixed to the top of the Z-axis moving mechanism 6 via the quick-release assembly 8, and at the same time, the heat dissipation circulation pipe 404 is connected to the corrugated liquid storage hose 7 through the pipe system on the Z-axis moving mechanism 6. S2. When the print head 107 extrudes printing material onto the upper surface of the printing substrate assembly 4, the drive mechanism drives the Z-axis moving mechanism 6 to perform reciprocating motion in the Z-axis direction to achieve 3D printing. S3. At the same time, the Z-axis moving mechanism 6 is used to circulate the coolant in the corrugated liquid storage hose 7 through the pipeline system in the heat dissipation circulation pipe 404 to achieve heat dissipation of the printing substrate assembly 4.

[0037] Specifically, during use, the PLC controller controls the first servo motor 114 to work, so that the first lead screw 117 drives the vertical sliding frame to move up and down, and realizes the adjustment of the vertical height of the X-axis horizontal seat 105 and the print head 107 on the vertical sliding frame. The PLC controller controls the second servo motor 116 to work. The second servo motor 116 drives the transmission belt 109 to rotate through the second pulley 118, so that the transmission belt 109 drives the print head 107 to move along the X-axis direction of the X-axis horizontal seat 105 through the transverse sliding bracket 110, thereby adjusting the position of the print head 107 above the printing substrate assembly 4. This ultimately moves the print head 107 to an appropriate position above the printing substrate assembly 4, ensuring that the distance between the bottom of the tapered extrusion head on the print head 107 and the upper surface of the printing substrate assembly 4 meets the requirements for 3D printing. Subsequently, the PLC controller controls the third servo motor 5 to work. The third servo motor 5 drives the moving seat 601 to reciprocate along the slide groove 202 in the Z-axis direction (i.e., the front-back direction) through the third lead screw 501, thereby realizing the front-back movement of the printing substrate assembly 4 at the top of the Z-axis moving mechanism 6. This allows the printing material extruded through the conical extrusion head to gradually adhere to the upper surface of the cover plate 402, forming a 3D printed multilayer resonant metamaterial wave absorber. Furthermore, as the movable seat 601 moves forward along the slide groove 202, the movable seat 601 squeezes the front corrugated liquid storage hose 7 and stretches the rear corrugated liquid storage hose 7, so that the coolant in the front corrugated liquid storage hose 7 circulates in the heat dissipation circulation pipe 404 through the pipeline system and then flows back to the rear corrugated liquid storage hose 7. As the movable seat 601 moves backward along the slide groove 202, the movable seat 601 stretches the front corrugated liquid storage hose 7 and squeezes the rear corrugated liquid storage hose 7, causing the coolant in the rear corrugated liquid storage hose 7 to circulate through the pipeline system in the heat dissipation circulation pipe 404 and then flow back to the front corrugated liquid storage hose 7 (the corrugated liquid storage hose 7 is also equipped with an exhaust pressure relief valve, which is used to expel the air inside the corrugated liquid storage hose 7 when the coolant inside the heat dissipation circulation pipe 404 enters the corrugated liquid storage hose 7). This allows the coolant in the corrugated liquid storage hose 7 to circulate through the pipeline system in the heat dissipation circulation pipe 404, thereby dissipating heat from the printed substrate assembly 4. This enables the multilayer resonant metamaterial wave absorber attached to the upper surface of the cover plate 402 to cool and solidify rapidly.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 3D printing molding device for a multilayer resonant metamaterial absorber, comprising a worktable, characterized in that: An XY axis moving mechanism is provided on one side of the upper end of the worktable. The XY axis moving mechanism is used to adjust the position of the print head on it in the X and Y axis directions. The upper middle part of the worktable is provided with a drive mechanism, a Z-axis moving mechanism and a printing substrate assembly; After the printing substrate assembly is connected and fixed to the top of the Z-axis moving mechanism using a quick-release assembly, the piping system on the Z-axis moving mechanism is connected to the heat dissipation circulation pipe built into the printing substrate assembly. The workbench is also equipped with two sets of corrugated liquid storage hoses symmetrically arranged front and back, and the inner ends of the corrugated liquid storage hoses are connected to the bottom of the pipeline system. When the print head extrudes printing material onto the upper surface of the printing substrate assembly, the drive mechanism drives the Z-axis moving mechanism to reciprocate in the Z-axis direction to achieve 3D printing. At the same time, the Z-axis moving mechanism is used to circulate the coolant in the corrugated liquid storage hose through the pipeline system in the heat dissipation circulation pipe to achieve heat dissipation for the printing substrate assembly.

2. The 3D printing molding device for a multilayer resonant metamaterial absorber according to claim 1, characterized in that: The XY axis moving mechanism includes a Y-axis vertical seat and a first servo motor fixed on one side of the upper end of the worktable, and an X-axis horizontal seat fixed on the Y-axis vertical seat by a vertical sliding bracket. The print head is fixed on the transverse sliding bracket on the X-axis horizontal support; The first lead screw at the top of the first servo motor passes through the vertical sliding bracket; A second servo motor is fixed on the vertical sliding frame. The second servo motor is used to drive the transmission belt on the X-axis horizontal seat to rotate, and the horizontal sliding frame is fixed to the transmission belt.

3. The 3D printing molding device for a multilayer resonant metamaterial absorber according to claim 2, characterized in that: The vertical sliding frame includes a first slide and a second slide located on both sides of the Y-axis support. A first roller and a second roller are movably connected between the first slide and the second slide, and the first roller and the second roller are in close contact with the side wall of the Y-axis support. The second servo motor is fixed on the side between the first and second carriages, the first lead screw passes through the first carriage, and the X-axis cross seat is fixed on the outside of the second carriage; The outer sides of both ends of the X-axis horizontal seat are movably connected to the first pulley and the second pulley by connecting plates, and the transmission belt is connected between the first pulley and the second pulley; The transverse sliding bracket is movably connected to a third roller and a fourth roller on its side, with the third roller and the fourth roller closely attached to the side wall of the X-axis transverse seat.

4. The 3D printing molding device for a multilayer resonant metamaterial absorber according to claim 1, characterized in that: The print head is equipped with a feed pipe and a conical extrusion head connected to the bottom of the feed pipe, and a cooling fan is also provided on the side of the print head.

5. The 3D printing molding device for a multilayer resonant metamaterial absorber according to claim 1, characterized in that: The drive mechanism includes a third servo motor fixed at the front end of the worktable and a third lead screw connected to the output end of the third servo motor. The third lead screw extends into a groove in the middle of the upper part of the worktable. The Z-axis moving mechanism includes a movable seat that slides in the slide groove, a limiting frame on both sides of the upper end of the movable seat, a support plate set on the top of the limiting frame, and a support spring set on the top of both ends of the support plate. The middle of the movable seat is penetrated by a third lead screw, and the corrugated liquid storage hose is sleeved on the outside of both ends of the third lead screw; The outer side of the limiting frame slides into the limiting grooves on both sides of the worktable.

6. The 3D printing molding device for a multilayer resonant metamaterial absorber according to claim 5, characterized in that: The quick-release assembly includes a rectangular hollow stand at the upper middle part of the movable base, a stop block connected by a pin in the slot on the upper side of the rectangular hollow stand, a first reset spring inside the rectangular hollow stand, and a lifting block assembly inserted into the rectangular hollow stand at the bottom. The bottom inner side of the abutment block is provided with a connecting arm, and the inner end of the connecting arm is provided with an abutment ball. The top of the first reset spring abuts against the bottom of the connecting arm. The lifting block assembly includes a bottom limiting block inserted into the rectangular hollow base and a top limiting block fixed by a column at the upper middle part of the bottom limiting block. The bottom limiting block sits on the abutment ball.

7. The 3D printing molding device for a multilayer resonant metamaterial absorber according to claim 6, characterized in that: The pipeline system includes two sets of top-inserted vertical pipes provided at the upper end of the top limiting block, two sets of connecting hoses provided at the lower end of the bottom limiting block, and bottom-inserted horizontal pipes provided at the front and rear ends of the movable seat. The connecting hoses are located inside the first reset spring. The top of the connecting hose is connected to the corresponding top insertion vertical pipe through the bottom limiting block, the column, and the upper channel inside the top limiting block. The bottom of the connecting hose is connected to the corresponding bottom insertion horizontal pipe through the lower channel inside the movable seat, and the bottom insertion horizontal pipe is inserted into the corresponding corrugated liquid storage hose.

8. The 3D printing device for a multilayer resonant metamaterial absorber according to claim 7, characterized in that: The printing substrate assembly includes a base plate for mounting the heat dissipation circulation pipe, a cover plate on the top of the base plate, a rectangular frame in the middle of the lower end of the base plate, a locking block that slides between two sets of ear plates on the side of the rectangular frame, a vertical plate at the bottom of the outer end of the locking block, and a second reset spring connecting the inner wall of the vertical plate and the outer wall of the rectangular frame. The two sets of ear plates are located on both sides of the insertion slot on the side of the rectangular frame, and the inner end of the card block is located in the insertion slot; The card block is provided with sliders on both sides, and the sliders slide into the rectangular through slots on the ear plate; After the top limiting block is inserted into the rectangular frame, the top of the top insertion vertical pipe is inserted into the interior of both ends of the heat dissipation circulation pipe.

9. A molding method for a multilayer resonant metamaterial absorber 3D printing molding device based on any one of claims 1-8, characterized in that: Specifically, the following steps are included: S1. Connect and fix the printing substrate assembly to the top of the Z-axis moving mechanism via the quick-release assembly, and at the same time, the heat dissipation circulation pipe is connected to the corrugated liquid storage hose through the pipe system on the Z-axis moving mechanism. S2. When the print head extrudes printing material onto the upper surface of the printing substrate assembly, the drive mechanism drives the Z-axis moving mechanism to perform reciprocating motion in the Z-axis direction to achieve 3D printing. S3. At the same time, the Z-axis moving mechanism is used to circulate the coolant in the corrugated liquid storage hose through the pipeline system in the heat dissipation circulation pipe to achieve heat dissipation of the printing substrate assembly.

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