Layer-by-layer scanning system and method applied to building 3D printing

Abstract

The invention relates to the field of 3D printing, and provides a layer-by-layer scanning system and method applied to building 3D printing, the layer-by-layer scanning system comprises a workbench and a driving box, the top wall of the workbench is provided with a processing groove, a storage groove, a recovery groove and a crushing cavity, the processing groove is internally connected with a first lifting part, the storage groove is internally connected with a second lifting part, and the side wall of the recovery groove is provided with a block groove; the inner wall of the block groove is slidably connected with a sliding block, the sliding block is connected with the top wall of the block groove through a second elastic piece, the screening net is fixedly connected to the sliding block, the screening net is slidably connected to the inner wall of the recycling groove, a plate channel is formed in the inner wall of the guiding channel, the inner wall of the plate channel is slidably connected with a blocking plate, and the top wall of the blocking plate is fixedly connected with a permanent magnet strip. More than two crushing blades are fixedly connected to the crushing shaft; a driving column is slidably connected to the driving box, a scraper, a third rack and a permanent magnet plate are connected to the driving column, and a laser emitting assembly is connected to the driving box. According to the metal powder recycling and screening device, redundant metal powder can be automatically recycled and screened.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a layer-by-layer scanning system and method applied to architectural 3D printing. Background Art

[0002] 3D printing technology can be used to quickly and accurately produce building components, such as building nodes and connectors. Commonly used 3D printing technologies in the construction field include selective laser melting technology. Selective laser melting technology uses a selective laser melting device to print building components. The 3D printing principle of the selective laser melting device is to use a high-power laser beam to selectively scan and melt metal powder layer by layer. The metal powder solidifies and bonds layer by layer to form building components.

[0003] When the current selective laser melting device is laying metal powder, the scraper will push some of the granulated metal powder in the processing tank into the recovery tank, and subsequent manual screening of the metal particles and metal powder is required before the recovered metal powder can be reused. Summary of the invention

[0004] In view of the above technical problems, the present invention aims to provide a layer-by-layer scanning system and method for architectural 3D printing. To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A layer-by-layer scanning system for architectural 3D printing includes a workbench and a drive box, wherein the drive box is fixed to the top wall of the workbench;

[0006] The top wall of the workbench is provided with a processing groove, a storage groove, a recovery groove and a crushing chamber, the processing groove is connected with a first lifting member, the storage groove is connected with a second lifting member, the side wall of the recovery groove is provided with a block groove, the inner wall of the block groove is slidably connected with a slider, the slider is connected to the top wall of the block groove through a second elastic member, the screening net is fixed to the slider, the screening net is slidably connected to the inner wall of the recovery groove, the side wall of the recovery groove is connected with the side wall of the crushing chamber through a guide channel, the inner wall of the guide channel is provided with a plate channel, the inner wall of the plate channel is slidably connected with a blocking plate, the top wall of the blocking plate is fixedly connected with a permanent magnetic strip, an extension piece is fixedly connected to the blocking plate, the extension piece is connected to the top wall of the workbench through a third elastic member, the bottom wall of the crushing chamber is rotatably connected with a crushing shaft, more than two crushing leaves are fixedly connected to the crushing shaft, a rotating rod is fixedly connected to the crushing shaft, the rotating rod is rotatably connected to the top wall of the crushing chamber, the upper end of the rotating rod extends above the workbench, and the upper end of the rotating rod is fixedly connected to a third spur gear;

[0007] A driving column is slidably connected to the driving box, a scraper is fixedly connected to the bottom wall of the driving column, a third rack is fixedly connected to the top wall of the driving column, a permanent magnet plate is fixedly connected to the side wall of the driving column, and a laser emitting assembly is connected to the driving box.

[0008] Furthermore, the crushing shaft is fixedly connected to the rotating rod through the second worm, the side wall of the crushing chamber is rotatably connected to the rotating shaft, the left end of the rotating shaft is fixedly connected to the second worm wheel, the second worm wheel and the second worm are meshed, the right end of the rotating shaft extends into the recovery groove, the force-applying member is fixedly connected to the right end of the rotating shaft, and the force-applying member is located below the screening net.

[0009] Furthermore, a powder cleaning assembly is provided on the driving column.

[0010] Furthermore, the powder cleaning assembly includes a first spur gear, a storage roller, a cleaning seat, an automatic wire taking-up device, an air guide seat and a first rack, the first spur gear is rotatably connected to the driving column, the storage roller is fixedly connected to the first spur gear, a transmission line is fixedly connected to the storage roller, the transmission line is fixedly connected to the cleaning seat, the cleaning seat is slidably connected to the driving column, the automatic wire taking-up device is fixedly connected to the driving column, a pull line is movably connected to the automatic wire taking-up device, the pull line is fixedly connected to the cleaning seat, the air guide seat is slidably connected to the cleaning seat, the first rack is fixedly connected to the driving column, a gear cavity and an air producing cavity are provided on the cleaning seat, the air producing cavity and the outer wall of the cleaning seat are connected, the bottom wall of the gear cavity is rotatably connected to the first worm, and the upper end of the first worm is fixedly connected to the There is a second spur gear, the second spur gear is meshed with the first rack, the lower end of the first worm extends into the air producing chamber, the inner wall of the air producing chamber is fixedly connected to a support frame, a fan blade assembly is rotatably connected to the support frame, the fan blade assembly is fixedly connected to the first worm gear, the first worm gear is meshed with the first worm, an air guide channel is provided on the air guide seat, a rotating bar is rotatably connected to the air guide seat, a transmission block is slidably connected to the cleaning seat, an inclined channel is provided on the transmission block, the rotating bar is slidably connected to the inner wall of the inclined channel, a first permanent magnet block is fixedly connected to the transmission block, the transmission block is connected to the connecting block through a first elastic member, the connecting block is fixedly connected to the cleaning seat, a second rack and a second permanent magnet block are fixedly connected to the drive box, and the second rack is meshed with the first spur gear.

[0011] Furthermore, the guide channel is inclined and the screening net is inclined.

[0012] Furthermore, a slide rail is fixedly connected to the drive box, and the drive column is slidably connected to the slide rail.

[0013] Furthermore, the air guiding channel includes an inclined section and a horizontal section.

[0014] Furthermore, the force applying member is provided with a curved surface.

[0015] Furthermore, the scraper is made of structural steel.

[0016] A 3D printing method for architecture based on layer-by-layer scanning utilizes a layer-by-layer scanning system applied to architectural 3D printing to print architectural components.

[0017] The present invention has the following beneficial effects:

[0018] The present invention can automatically recycle excess metal powder when the driving column and the scraper move to lay the metal powder, and can automatically screen the metal powder and metal particles, and automatically crush the screened metal particles into metal powder for subsequent continued utilization, thereby achieving the purpose of saving resources and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of a layer-by-layer scanning system applied to architectural 3D printing of the present invention;

[0021] Figure 2 The present invention Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 The present invention Figure 2 Schematic diagram of the structure of the first straight gear and the receiving roller;

[0023] Figure 4 The present invention Figure 1 The enlarged view of point B in the middle;

[0024] Figure 5 The present invention Figure 1 Enlarged view of point C in the middle;

[0025] Figure 6 The present invention Figure 5 A schematic diagram of the structure of the rotating shaft and the force applying member;

[0026] Figure 7 The present invention Figure 1 Left side view of the middle drive column;

[0027] Figure 8 The present invention Figure 7 Schematic diagram of the structure of the middle air guide seat and transmission block.

[0028] Figure numerals: 1, workbench; 2, drive box; 3, processing tank; 4, first lifting member; 5, storage tank; 6, second lifting member; 7, recovery tank; 8, crushing chamber; 9, scraper; 10, driving column; 11, third rack; 12, first spur gear; 13, storage roller; 14, cleaning seat; 15, automatic wire taking-up device; 16, gear chamber; 17, air production chamber; 18, second spur gear; 19, first worm; 20, first worm wheel; 21, fan blade assembly; 22, support frame; 23, air guide seat; 24, air guide channel; 25, rotating bar; 26, transmission block; 27, inclined channel; 28, first Permanent magnet block; 29, first elastic member; 30, connecting block; 31, permanent magnet plate; 32, first rack; 33, second rack; 34, second permanent magnet block; 35, guide channel; 36, plate channel; 37, block slot; 38, slider; 39, second elastic member; 40, screening net; 41, blocking plate; 42, permanent magnet strip; 43, extension sheet; 44, third elastic member; 45, third spur gear; 46, rotating rod; 47, second worm; 48, crushing shaft; 49, crushing blade; 50, second worm gear; 51, rotating shaft; 52, force member; 53, transmission line; 54, pull line; 55, laser emission assembly. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1-Figure 8 As shown, a layer-by-layer scanning system applied to architectural 3D printing comprises a workbench 1 and a drive box 2, wherein the drive box 2 is fixedly connected to the top wall of the workbench 1;

[0033] The top wall of the workbench 1 is provided with a processing groove 3, a storage groove 5, a recovery groove 7 and a crushing chamber 8. The processing groove 3 is connected with a first lifting member 4, the storage groove 5 is connected with a second lifting member 6, the side wall of the recovery groove 7 is provided with a block groove 37, the inner wall of the block groove 37 is slidably connected with a slider 38, the slider 38 is connected to the top wall of the block groove 37 through a second elastic member 39, a screening net 40 is fixed to the slider 38, the screening net 40 is slidably connected to the inner wall of the recovery groove 7, the side wall of the recovery groove 7 is connected with the side wall of the crushing chamber 8 through a guide channel 35, the inner wall of the guide channel 35 is provided with a plate channel 36, and the inner wall of the plate channel 36 is slidably connected with a barrier Plate 41, the top wall of the blocking plate 41 is fixedly connected with a permanent magnetic strip 42, the blocking plate 41 is fixedly connected with an extension sheet 43, the extension sheet 43 is connected to the top wall of the workbench 1 through a third elastic member 44, the bottom wall of the crushing chamber 8 is rotatably connected with a crushing shaft 48, and the crushing shaft 48 is fixedly connected with two or more crushing leaves 49, and the crushing leaves 49 can be made of high-carbon steel. High-carbon steel has high hardness and wear resistance and is suitable for scenes with high wear resistance requirements. A rotating rod 46 is fixedly connected to the crushing shaft 48, and the rotating rod 46 is rotatably connected to the top wall of the crushing chamber 8. The upper end of the rotating rod 46 extends above the workbench 1, and the upper end of the rotating rod 46 is fixedly connected with a third spur gear 45;

[0034] A driving column 10 is slidably connected to the driving box 2, a scraper 9 is fixedly connected to the bottom wall of the driving column 10, a third rack 11 is fixedly connected to the top wall of the driving column 10, a permanent magnet plate 31 is fixedly connected to the side wall of the driving column 10, and a laser emitting assembly 55 is connected to the driving box 2. The laser emitting assembly 55 can emit a high-power laser beam. The high-power laser beam scans the processing groove 3 according to the digital design data. The high-power laser beam selectively melts and fuses the metal powder particles, and melts according to a cross section of the three-dimensional model.

[0035] like Figure 1 , 5 As shown in , 6, according to an optional embodiment of the present invention, the crushing shaft 48 is fixedly connected to the rotating rod 46 through the second worm 47, the side wall of the crushing chamber 8 is rotatably connected with a rotating shaft 51, the left end of the rotating shaft 51 is fixedly connected to the second worm gear 50, the second worm gear 50 is meshed with the second worm 47, the right end of the rotating shaft 51 extends into the recovery groove 7, the force member 52 is fixedly connected to the right end of the rotating shaft 51, the force member 52 is located below the screening net 40, and the force member 52 can push the screening net 40 to move upward when it rotates.

[0036] like Figure 1-5As shown in 7-8, according to an optional embodiment of the present invention, the driving column 10 is provided with a powder cleaning component, and the powder cleaning component is used to clean the metal powder remaining on the scraper 9.

[0037] like Figure 1-5 , 7-8, according to an optional embodiment of the present invention, the powder cleaning assembly includes a first straight gear 12, a receiving roller 13, a cleaning seat 14, an automatic wire taking-up device 15, an air guide seat 23 and a first rack 32, the first straight gear 12 is rotatably connected to the driving column 10, the receiving roller 13 is fixedly connected to the first straight gear 12, a transmission line 53 is fixedly connected to the receiving roller 13, the transmission line 53 is fixedly connected to the cleaning seat 14, and the cleaning seat 14 is slidably connected to the driving column 10 The automatic wire-taking device 15 is fixedly connected to the driving column 10, and a pull wire 54 is movably connected to the automatic wire-taking device 15. The pull wire 54 is fixedly connected to the cleaning seat 14. The internal structure of the automatic wire-taking device 15 refers to the prior art, such as the elastic automatic recovery mechanism of the tape measure. The wind guide seat 23 is slidably connected to the cleaning seat 14. The first rack 32 is fixedly connected to the driving column 10. The cleaning seat 14 is provided with a gear cavity 16 and an air-generating cavity 17. The air-generating cavity 17 is connected to the outer wall of the cleaning seat 14. The gear cavity The bottom wall of the first worm 16 is rotatably connected to the first worm 19, the upper end of the first worm 19 is fixedly connected to the second spur gear 18, the second spur gear 18 is meshed with the first rack 32, the lower end of the first worm 19 extends into the air producing chamber 17, the inner wall of the air producing chamber 17 is fixedly connected to the support frame 22, the support frame 22 is rotatably connected to the fan blade assembly 21, the fan blade assembly 21 is fixedly connected to the first worm wheel 20, the first worm wheel 20 is meshed with the first worm 19, the air guide seat 23 is provided with an air guide channel 24, the air guide seat 23 A rotating bar 25 is rotatably connected on the upper side, a transmission block 26 is slidably connected on the cleaning seat 14, an inclined channel 27 is provided on the transmission block 26, the rotating bar 25 is slidably connected to the inner wall of the inclined channel 27, a first permanent magnet block 28 is fixedly connected to the transmission block 26, the transmission block 26 is connected to the connecting block 30 through the first elastic member 29, the connecting block 30 is fixedly connected to the cleaning seat 14, a second rack 33 and a second permanent magnet block 34 are fixedly connected to the drive box 2, and the second rack 33 is meshed with the first spur gear 12.

[0038] like Figure 5 As shown, according to an optional embodiment of the present invention, the guide channel 35 is tilted to facilitate the metal particles to slide into the crushing chamber 8, and the screening net 40 is tilted to facilitate the metal particles to slide into the guide channel 35.

[0039] like Figure 1 , 2 As shown in FIG. 5 , according to an optional embodiment of the present invention, a slide rail is fixedly connected to the driving box 2 , and the driving column 10 is slidably connected to the slide rail, and the slide rail guides the driving column 10 .

[0040] like Figure 4 As shown, according to an optional embodiment of the present invention, the air guiding channel 24 includes an inclined section and a horizontal section, the inclined section and the horizontal section are connected, the inclined section is close to the air producing cavity 17, and the air guiding channel 24 is away from the air producing cavity 17.

[0041] like Figure 5-6 As shown, according to an optional embodiment of the present invention, the force applying member 52 is provided with a curved surface, which can reduce the friction between the force applying member 52 and the screening net 40 when rotating, reduce component wear and improve operation smoothness.

[0042] like Figure 1 , 2 As shown in FIG. 7 , according to an optional embodiment of the present invention, the material of the scraper 9 includes structural steel. The structural steel has a high hardness and can resist wear and tear, thereby maintaining the sharp edge of the scraper 9 , which is very important for ensuring uniform spreading of the powder.

[0043] A 3D printing method for architecture based on layer-by-layer scanning utilizes a layer-by-layer scanning system applied to architectural 3D printing to print architectural components.

[0044] Implementation process:

[0045] In the initial state, the scraper 9 and the driving column 10 are located on the right side of the storage trough 5 , the first spur gear 12 is not meshed with the second rack 33 , the air guide seat 23 is located above the workbench 1 , and the blocking plate 41 does not block the guide channel 35 .

[0046] Metal powder is filled into the storage tank 5, a layer of metal powder is laid on the top wall of the first lifting member 4, and the laser emitting assembly 55 moves and emits a high-power laser beam. The high-power laser beam selectively scans the metal powder bed layer according to the slice data of the three-dimensional model and melts the powder along a predetermined path. The metal powder area scanned by the high-power laser beam will melt and solidify rapidly, and bond with the solidified layer below to form a part of the building component.

[0047] The first lifting member 4 moves down a short distance, and the second lifting member 6 moves up a short distance. The metal powder on the second lifting member 6 extends to the top of the storage trough 5. At this time, the scraper 9 and the driving column 10 are located on the right side of the storage trough 5. The driving column 10 is driven to move left, and the scraper 9 pushes the metal powder above the storage trough 5 into the processing trough 3 and flattens it.

[0048] During the left movement of the driving column 10, the first spur gear 12 rotates under the action of the second rack 33, thereby driving the storage roller 13 to rotate, and the storage roller 13 stores the transmission line 53, so that the transmission line 53 pulls the cleaning seat 14 to move backward, and the cleaning seat 14 pulls out the pull wire 54 in the automatic wire taking-up device 15, and the third rack 11 and the third spur gear 45 are meshed, and the permanent magnet plate 31 moves to above the permanent magnet strip 42. The magnetic repulsion of the permanent magnet plate 31 causes the permanent magnet strip 42 and the blocking plate 41 to overcome the elastic force of the third elastic member 44 and move downward, so that the blocking plate 41 blocks the guide channel 35 to prevent the metal powder on the top wall of the screening net 40 from entering the guide channel 35.

[0049] When the scraper 9 moves to above the recovery groove 7, the first elastic member 29 moves to the front of the second permanent magnet block 34. The magnetic repulsion of the second permanent magnet block 34 causes the transmission block 26 to overcome the elastic force of the first elastic member 29 and move forward. The inclined channel 27 drives the turning bar 25 to move downward, thereby moving the air guide seat 23 downward. The bottom wall of the air guide seat 23 extends into the recovery groove 7. The horizontal section of the air guide channel 24 is aligned with the bottom wall of the scraper 9 so that the subsequent wind can blow directly against the bottom wall of the scraper 9.

[0050] The scraper 9 pushes the excess metal powder on the processing groove 3 to the top wall of the screening net 40 in the recovery groove 7. Due to the burning of the high-power laser beam, part of the metal powder on the processing groove 3 will agglomerate and melt into larger metal particles, i.e., granulated metal powder. Some of these metal particles will enter the top wall of the screening net 40 as pushed by the scraper 9.

[0051] When the third rack 11 moves to the left, the third rack 11 drives the third spur gear 45 to rotate, thereby rotating the rotating rod 46, the second worm 47, the crushing blade 49, the crushing blade 49, the second worm gear 50, the rotating shaft 51, and the force member 52 rotate, and the crushing chamber 8 crushes the metal particles previously fallen into the crushing chamber 8 into metal powder for subsequent recycling. When the force member 52 and the screening net 40 are against each other, the screening net 40 and the slider 38 will be pushed to overcome the elastic force of the second elastic member 39 and move upward. When the force member 52 is separated from the screening net 40, the screening net 40 moves down and resets under the elastic force of the second elastic member 39 and its own gravity. In this way, the screening net 40 moves up and down continuously to screen the metal powder on the screening net 40. The metal powder passes through the screening net 40 and enters the bottom wall of the recovery tank 7, and the metal particles remain on the top wall of the screening net 40.

[0052] The driving column 10 continues to move to the left, and the first spur gear 12 disengages from the meshing with the second rack 33. At this time, the automatic recovery force of the automatic wire take-up device 15 causes the pull wire 54 to be automatically recovered, and the cleaning seat 14 is automatically pulled forward quickly. The storage roller 13 releases the transmission wire 53, and the second spur gear 18 on the cleaning seat 14 rotates under the meshing action of the first rack 32. The second spur gear 18 drives the first worm 19, the first worm wheel 20, and the fan blade assembly 21 to rotate. The rotation of the fan blade assembly 21 generates wind, and the wind enters the air guide channel 24. After being guided by the air guide channel 24, it is blown out from the horizontal section to the side wall and bottom wall of the scraper 9. The metal powder on the scraper 9 is blown into the recovery tank 7 for recovery by wind force, thereby realizing the functions of automatic powder recovery and automatic cleaning, and preventing excessive accumulation of metal powder on the scraper 9 from causing the scraper 9 to get stuck when sliding on the top wall of the workbench 1.

[0053] Then the driving column 10 is controlled to move right and reset to the right side of the material storage trough 5. During the rightward movement of the driving column 10, the crushing blade 49 reverses to crush the metal particles again to increase the degree of crushing. After the third rack 11 disengages from the third spur gear 45, the third spur gear 45 stops rotating. After the permanent magnet plate 31 moves to the right side of the permanent magnet bar 42, the blocking plate 41 moves up and resets under the elastic force of the third elastic member 44, so that the metal particles on the screening net 40 pass through the guide channel 35 and enter the crushing chamber 8 for subsequent crushing. After the first permanent magnet block 28 moves to the right side of the second permanent magnet block 34, the first permanent magnet block 28 and the transmission block 26 move backward and reset under the elastic force of the first elastic member 29. The channel 27 drives the rotating bar 25 and the air guide seat 23 to move up and reset, and the air guide seat 23 disengages from the recovery slot 7 to prevent obstruction of the driving column 10 from moving right and resetting. The first spur gear 12 meshes with the second rack 33 again, and the first spur gear 12 and the storage roller 13 reverse. The storage roller 13 stores the transmission line 53, and the cleaning seat 14 moves backward. When the driving column 10 moves right and resets to the right side of the storage tank 5, the first spur gear 12 disengages from the meshing of the second rack 33, and the cleaning seat 14 moves forward and resets. The wind generated by the fan blade assembly 21 can move part of the residual metal powder on the top wall of the workbench 1 to the storage tank 5, and can also facilitate the subsequent cleaning seat 14 to move forward and clean the scraper 9 at multiple angles.

[0054] This process is repeated so that the metal powder is scanned by the high-power laser beam layer by layer, melted and quickly solidified until the entire building component is completed.

[0055] After printing is completed, the building component needs to be taken out from the processing tank 3, and the excess metal powder needs to be removed, and the building component needs to be subjected to post-processing steps such as heat treatment and surface treatment to ensure the final performance of the part.

[0056] The drawings in the specification only depict the innovative parts, and omit other conventional components of the selective laser melting device, such as the shell mechanism, the inert gas supply mechanism, the temperature control mechanism, etc.

[0057] The present invention can automatically recycle excess metal powder when the driving column 10 and the scraper 9 move to lay metal powder, and can automatically screen the metal powder and metal particles, and automatically crush the screened metal particles into metal powder for subsequent continued utilization, thereby achieving the purpose of saving resources and reducing production costs. It can also automatically clean and blow off the metal powder adhering to the scraper 9 to prevent the scraper 9 from getting stuck when moving, thereby affecting the operation of the system.

[0058] The components, modules, mechanisms and devices not described in detail in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A layer-by-layer scanning system for architectural 3D printing, characterized in that: It comprises a workbench (1) and a drive box (2), wherein the drive box (2) is fixedly connected to the top wall of the workbench (1); The top wall of the workbench (1) is provided with a processing groove (3), a material storage groove (5), a recovery groove (7) and a crushing chamber (8); the processing groove (3) is connected with a first lifting member (4); the material storage groove (5) is connected with a second lifting member (6); the side wall of the recovery groove (7) is provided with a block groove (37); the inner wall of the block groove (37) is slidably connected with a slider (38); the slider (38) is connected to the top wall of the block groove (37) through a second elastic member (39); a screening net (40) is fixed to the slider (38); the screening net (40) is slidably connected to the inner wall of the recovery groove (7); the side wall of the recovery groove (7) is connected with the side wall of the crushing chamber (8) through a guide channel (35); the inner wall of the guide channel (35) A plate channel (36) is provided, the inner wall of the plate channel (36) is slidably connected to a blocking plate (41), the top wall of the blocking plate (41) is fixedly connected to a permanent magnetic strip (42), an extension sheet (43) is fixedly connected to the blocking plate (41), the extension sheet (43) is connected to the top wall of the workbench (1) via a third elastic member (44), a grinding shaft (48) is rotatably connected to the bottom wall of the grinding chamber (8), more than two grinding blades (49) are fixedly connected to the grinding shaft (48), a rotating rod (46) is fixedly connected to the grinding shaft (48), the rotating rod (46) is rotatably connected to the top wall of the grinding chamber (8), the upper end of the rotating rod (46) extends above the workbench (1), and the upper end of the rotating rod (46) is fixedly connected to a third spur gear (45); A driving column (10) is slidably connected to the driving box (2); a scraper (9) is fixedly connected to the bottom wall of the driving column (10); a third rack (11) is fixedly connected to the top wall of the driving column (10); a permanent magnet plate (31) is fixedly connected to the side wall of the driving column (10); and a laser emitting assembly (55) is connected to the driving box (2).

2. A layer-by-layer scanning system for architectural 3D printing according to claim 1, characterized in that: The crushing shaft (48) is fixedly connected to the rotating rod (46) via a second worm (47); a rotating shaft (51) is rotatably connected to the side wall of the crushing chamber (8); a second worm wheel (50) is fixedly connected to the left end of the rotating shaft (51); the second worm wheel (50) is meshed with the second worm (47); the right end of the rotating shaft (51) extends into the recovery groove (7); a force applying member (52) is fixedly connected to the right end of the rotating shaft (51); and the force applying member (52) is located below the screening net (40).

3. The layer-by-layer scanning system for architectural 3D printing according to claim 2 is characterized in that: The driving column (10) is provided with a powder cleaning component.

4. The layer-by-layer scanning system for architectural 3D printing according to claim 3 is characterized in that: The powder cleaning assembly comprises a first spur gear (12), a storage roller (13), a cleaning seat (14), an automatic wire taking-up device (15), an air guide seat (23) and a first rack (32); The first spur gear (12) is rotatably connected to the driving column (10), the receiving roller (13) is fixedly connected to the first spur gear (12), a transmission line (53) is fixedly connected to the receiving roller (13), the transmission line (53) and the cleaning seat (14) are fixedly connected, the cleaning seat (14) is slidably connected to the driving column (10), the automatic wire taking-up device (15) is fixedly connected to the driving column (10), a pull line (54) is movably connected to the automatic wire taking-up device (15), the pull line (54) and the cleaning seat (14) are movably connected to each other, and the pull line (54) and the cleaning seat (14) are movably connected to each other. ), the air guide seat (23) is slidably connected to the cleaning seat (14), the first rack (32) is fixed to the driving column (10), the cleaning seat (14) is provided with a gear chamber (16) and an air generating chamber (17), the air generating chamber (17) and the outer wall of the cleaning seat (14) are connected, the bottom wall of the gear chamber (16) is rotatably connected to a first worm gear (19), the upper end of the first worm gear (19) is fixedly connected to a second spur gear (18), the second spur gear (18) and the first rack (32) are meshed, and the first worm gear (19) is fixedly connected to the cleaning seat (14), the second spur gear (18) and the first rack (32) are meshed, and the first worm gear (19) is fixedly connected to the cleaning seat (14), and the second spur gear (18) and the first rack (32) are meshed. The lower end of the air guide seat (19) extends into the air generating chamber (17), the inner wall of the air generating chamber (17) is fixedly connected to a support frame (22), a fan blade assembly (21) is rotatably connected to the support frame (22), a first worm gear (20) is fixedly connected to the fan blade assembly (21), the first worm gear (20) and the first worm (19) are meshed, an air guide channel (24) is provided on the air guide seat (23), a rotating bar (25) is rotatably connected to the air guide seat (23), and a transmission block (26) is slidably connected to the cleaning seat (14). The transmission block (26) is provided with an inclined channel (27), the rotating bar (25) is slidably connected to the inner wall of the inclined channel (27), the transmission block (26) is fixedly connected with a first permanent magnet block (28), the transmission block (26) is connected to a connecting block (30) via a first elastic member (29), the connecting block (30) is fixedly connected to the cleaning seat (14), the drive box (2) is fixedly connected with a second rack (33) and a second permanent magnet block (34), and the second rack (33) is meshed with the first spur gear (12).

5. The layer-by-layer scanning system for architectural 3D printing according to claim 4 is characterized in that: The guide channel (35) is arranged obliquely, and the screening net (40) is arranged obliquely.

6. The layer-by-layer scanning system for architectural 3D printing according to claim 5 is characterized in that: A slide rail is fixedly connected to the drive box (2), and the drive column (10) is slidably connected to the slide rail.

7. The layer-by-layer scanning system for architectural 3D printing according to claim 6 is characterized in that: The air guiding channel (24) comprises an inclined section and a horizontal section.

8. The layer-by-layer scanning system for architectural 3D printing according to claim 7, characterized in that: The force applying member (52) is provided with a curved surface.

9. The layer-by-layer scanning system for architectural 3D printing according to claim 8, characterized in that: The scraper (9) is made of structural steel.

10. A 3D printing method for architecture based on layer-by-layer scanning, characterized in that: A layer-by-layer scanning system for architectural 3D printing as described in any one of claims 1 to 9 is used to print architectural components.

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