Additive manufacturing powder circulating device

Abstract

The invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing powder circulating device which comprises a sealing cabinet, an XY-axis driving mechanism is arranged on the upper wall of an inner cavity of the sealing cabinet, and a laser printer head is installed in the XY-axis driving mechanism and used for driving the laser printer head to move in the XY-axis direction. An additive manufacturing box is installed at the bottom of an inner cavity of the sealing cabinet, a discharging assembly is arranged above the additive manufacturing box, and the discharging assembly comprises a discharging scraping rod arranged above the additive manufacturing box in a sliding mode. The problems that a large amount of powder is usually put into a manufacturing box and then scraped to be flat through a scraping rod, redundant powder needs to be scraped off from the manufacturing box, however, the operation method is tedious, the amount of the powder discharged into the manufacturing box cannot be controlled, the large amount of the powder is left outside the manufacturing box, and the manufacturing box is damaged are solved. Therefore, an operator needs to spend a large amount of time to scrape and collect the powder, and then 3D printing work can be conducted on the powder in the manufacturing box.

Description

Technical Field

[0001] The invention belongs to the technical field of additive manufacturing, and in particular to an additive manufacturing powder circulation device. Background Art

[0002] 3D printing, also known as additive manufacturing technology, uses laser scanning in a box with a protective atmosphere to solidify the molten metal powder material into a thin layer, which is then piled up layer by layer to print out a 3D formed part. The excess metal powder generated is usually collected in a collection box and then poured into a storage tank for recycling.

[0003] There are still some problems in the actual application of the above scheme. Usually, a large amount of powder is put into the manufacturing box, and then the powder is scraped flat with a scraper, and the excess powder needs to be scraped off from the manufacturing box and dropped into a collection tank for storage. However, this operation method is not only cumbersome, but also because it is impossible to control the amount of powder discharged into the manufacturing box, resulting in a large amount of powder remaining outside the manufacturing box. Therefore, the operator needs to spend a lot of time scraping and collecting the powder before 3D printing the powder in the manufacturing box, which greatly reduces the efficiency of workpiece printing and manufacturing.

[0004] To this end, the present invention provides an additive manufacturing powder circulation device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: an additive manufacturing powder circulation device described in the present invention comprises a sealed cabinet, an XY axis driving mechanism is arranged on the upper wall of the inner cavity of the sealed cabinet, and a laser printer head is installed inside the XY axis driving mechanism for driving the laser printer head to move the XY axis, an additive manufacturing box is installed at the bottom of the inner cavity of the sealed cabinet, and a material discharge assembly is arranged above the additive manufacturing box; The material unloading assembly includes a material unloading scraper rod slidably arranged above the additive manufacturing box, a temporary material storage tank is arranged inside the material unloading scraper rod, a bidirectional auger is rotatably connected to the inner cavity of the temporary material storage tank, two feeding ports are arranged on the upper end surface of the material unloading scraper rod, and a plurality of material unloading ports are arranged on the lower end surface of the material unloading scraper rod; A servo push rod is installed inside the lower end surface of the sealing cabinet, a piston rod end of the servo push rod is fixedly connected to a support plate, and the support plate is slidably connected in the inner cavity of the additive manufacturing box.

[0007] Preferably, one end of the bidirectional auger passes through the unloading scraper rod and is fixedly connected to a driven sprocket, one end of the driven sprocket is rotatably connected to a fixed frame, one end of the fixed frame is internally rotatably connected to a toothed disk, one end face of the toothed disk is fixedly connected to a transmission sprocket, the transmission sprocket is externally connected to a chain, and one end of the chain is internally connected to a driven sprocket.

[0008] Preferably, a rack is installed on the upper wall of the inner cavity of the sealed cabinet, and the rack is arranged in a U shape, the rack is meshingly connected with the gear disk, and the fixing frame is slidably connected in the inner cavity of the rack.

[0009] Preferably, both ends of the scraper rod are externally rotatably connected to rotating frames, a trowel plate is fixed between the rotating frames, a torsion spring is fixed inside one side of the rotating frame, and one end of the torsion spring is fixed to the scraper rod.

[0010] Preferably, one end of the unloading scraper rod is fixedly connected to a support rod, one end of the support rod is internally threaded with a screw rod, a groove is opened on the upper wall of the inner cavity of the sealed cabinet, and the screw rod is rotatably arranged in the inner cavity of the groove, a micro motor is arranged inside the upper end of the sealed cabinet, and the output shaft end of the micro motor is fixedly connected to the screw rod.

[0011] Preferably, a storage box is installed on one side of the upper end surface of the sealing cabinet, and a plurality of folding material guiding pipes are fixedly connected to the lower end of the storage box, and one end of the folding material guiding pipe is fixedly connected to the feed port.

[0012] Preferably, collecting troughs are provided on both sides of the inner cavity of the sealed cabinet, and a vibrating powder recovery assembly is provided in the inner cavity of the collecting trough, and the vibrating powder recovery assembly includes a screening mesh plate slidably arranged in the inner cavity of the collecting trough, and the screening mesh plate is used to collect workpieces printed by the laser.

[0013] Preferably, four fixed blocks are fixedly connected to the lower end surface of the screening mesh plate, and two of the fixed blocks form a group and are arranged on both sides of the lower end surface of the screening mesh plate, the lower end of the fixed block is rotatably connected to a U-shaped rotating block, a connecting shaft is rotatably connected between the U-shaped rotating blocks, and the U-shaped rotating block is rotatably connected to the inner wall of the collecting trough, a driving motor is arranged in one side of the sealing cabinet, and the output shaft of the driving motor is fixedly connected to the U-shaped rotating block.

[0014] Preferably, a sealing cover is rotatably connected to one side of the sealed cabinet, a cabinet door is rotatably connected to one side of the sealed cabinet, an insert box is provided in the inner cavity of the collection tank for collecting excess powder, a conduit is fixedly connected to one end face of the sealed cabinet, and one end of the conduit is fixedly connected to a vacuum machine, and the discharge port of the vacuum machine is connected to the storage box.

[0015] Preferably, an observation window is provided at one end of the sealed cabinet, and a transparent glass cover is provided in the inner cavity of the observation window. A distribution box is installed on the upper end surface of the sealed cabinet, and the distribution box is used to supply power to the entire additive manufacturing equipment.

[0016] The beneficial effects of the present invention are as follows: 1. The additive manufacturing powder circulation device described in the present invention drives the screw to rotate and the threaded transmission support rod to move back and forth in the inner cavity of the groove, thereby driving the unloading scraper rod to move above the additive manufacturing box, and then the powder will be discharged into the additive manufacturing box through the unloading port. At the same time, the unloading scraper rod will also scrape and smooth the discharged powder, thereby realizing quantitative discharge of powder from the additive manufacturing box and avoiding waste in the powder discharge process. When the unloading scraper rod moves above the additive manufacturing box, the rotating frame drives the screed plate to move with the unloading scraper rod, so that the powder above the additive manufacturing box is smoothed by the screed plate, and when the unloading scraper rod moves and resets, the screed plate will scrape off the excess powder above the additive manufacturing box, thereby solving the problem that after the existing additive manufacturing powder circulation device evenly spreads the powder into the additive manufacturing box, if the excess powder is not scraped and smoothed, the powder will exceed the inner cavity of the additive manufacturing box, causing the printed workpiece size to deviate.

[0017] 2. The additive manufacturing powder circulation device described in the present invention drives the support plate to move upward, and lifts the powder and the printed workpiece to move upward synchronously. After the support plate and the additive manufacturing box are at the same level, the unloading scraper rod is driven to move toward the screening mesh plate, thereby pushing the workpiece and the powder onto the screening mesh plate, and at the same time starting the driving motor to drive the U-shaped rotating block to rotate, thereby pulling the screening mesh plate to slide up and down in the inner cavity of the collecting trough, and then shaking and separating the workpiece and the powder, thereby solving the problem that the existing additive manufacturing powder circulation device is inconvenient to clean and recover excess powder after printing the workpiece, and the equipment needs to be in a sealed environment during workpiece processing, resulting in the operator only being able to clean and recover the powder from the workpiece through the jack with rubber gloves, which not only has low cleaning efficiency, but also affects the efficiency of powder recovery and recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the structure of the main view of the present invention as a whole; Figure 2 It is a schematic diagram of the structure of the rear-view stereogram of the present invention; Figure 3 It is a schematic diagram of the internal structure of a sealed cabinet of the present invention in partial section; Figure 4 It is a schematic diagram of the internal structure of the additive manufacturing box in a half-section according to the present invention; Figure 5 This is a schematic diagram of the internal structure of a half-section sealed cabinet of the present invention; Figure 6 This is a schematic diagram of the installation structure of the scraper rod for material removal of the present invention; Figure 7 It is a structural schematic diagram of the installation of the toothed disc of the present invention; Figure 8 It is a schematic diagram of the structure of a half-section of the blanking scraper rod of the present invention; Fig. 9 It is a schematic diagram of the installation structure of the rotating frame of the present invention; In the figure: 1. Sealed cabinet; 2. Observation window; 3. Distribution box; 4. Storage box; 5. Cabinet door; 6. Sealed cover; 7. Additive manufacturing box; 8. Unloading assembly; 81. Fixed frame; 82. Driven sprocket; 83. Transmission sprocket; 84. Toothed disc; 85. Rack; 86. Chain; 87. Two-way auger; 9. Collecting trough; 10. Screening mesh plate; 11. Unloading scraper rod; 12. Unloading port; 13. Temporary storage trough; 14. Feed port; 15. Folding guide pipe; 16. Support rod; 17. Rotating frame; 18. Smoothing plate; 19. Support plate; 20. Servo push rod; 21. Groove; 22. Screw rod; 23. Laser printer head; 24. XY axis drive mechanism; 25. Connecting shaft; 26. U-shaped rotating block; 27. Fixed block; 28. Conduit; 29. ​​Vacuum machine; 30. Torsion spring. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0021] like Figures 1 to 9 As shown, an additive manufacturing powder circulation device according to an embodiment of the present invention comprises a sealed cabinet 1, an XY axis driving mechanism 24 is arranged on the upper wall of the inner cavity of the sealed cabinet 1, and a laser printer head 23 is installed inside the XY axis driving mechanism 24, which is used to drive the laser printer head 23 to move in the XY axis, an additive manufacturing box 7 is installed at the bottom of the inner cavity of the sealed cabinet 1, and a material discharge assembly 8 is arranged above the additive manufacturing box 7; The material removal assembly 8 includes a material removal scraper 11 slidably disposed above the additive manufacturing box 7, a temporary material storage tank 13 is disposed inside the material removal scraper 11, a bidirectional auger 87 is rotatably connected to the inner cavity of the temporary material storage tank 13, two material feed ports 14 are disposed on the upper end surface of the material removal scraper 11, and a plurality of material removal ports 12 are disposed on the lower end surface of the material removal scraper 11; A servo push rod 20 is installed inside the lower end surface of the sealing cabinet 1 , and a support plate 19 is fixedly connected to the piston rod end of the servo push rod 20 , and the support plate 19 is slidably connected in the inner cavity of the additive manufacturing box 7 .

[0022] Specifically, in the prior art, a large amount of powder is usually put into a manufacturing box, and then a scraper is used to scrape the powder flat, and the excess powder needs to be scraped off from the manufacturing box. However, this operation method is not only cumbersome, but also because the amount of powder discharged into the manufacturing box cannot be controlled, resulting in a large amount of powder remaining outside the manufacturing box. Therefore, the operator needs to spend a lot of time scraping and collecting the powder before performing 3D printing on the powder in the manufacturing box; The present invention conveys the powder into the inner cavity of the temporary storage tank 13 through the feed port 14, and drives the bidirectional auger 87 to rotate at the same time, so that the bidirectional auger 87 twists the powder to move to the middle of the inner cavity of the temporary storage tank 13. In the process of the powder moving to the middle of the inner cavity of the temporary storage tank 13, part of the powder will be discharged into the additive manufacturing box 7 through the discharge port 12, and then the discharge scraper 11 is driven to move above the additive manufacturing box 7, and then the powder is evenly discharged into the additive manufacturing box 7 through the discharge port 12. At the same time, during the movement, the discharge scraper 11 can be used to smooth the powder discharged into the additive manufacturing box 7, and then the XY axis drive mechanism 24 is started to drive the laser printer head 23 to move, so as to perform 3D printing on the powder in the additive manufacturing box 7 according to the programming. The required workpiece is produced, and after the workpiece base is printed, the servo push rod 20 is started to drive the support plate 19 to move downward, thereby increasing the depth of the inner cavity of the additive manufacturing box 7 again, and then the unloading scraper 11 is driven to reciprocate above the additive manufacturing box 7 again, and then a layer of powder is spread in the additive manufacturing box 7 again, and then the laser printer head 23 is used to 3D print it again, and the required workpiece is printed and manufactured in sequence, thereby solving the problem that the existing additive manufacturing powder circulation device cannot control the amount of powder discharged into the additive manufacturing box during the 3D printing of the workpiece, resulting in a large amount of powder remaining on the outside of the additive manufacturing box, resulting in a lot of time being wasted on cleaning and collecting the residual powder after the workpiece is printed later.

[0023] like Figure 3 , Figure 6 and Figure 8 As shown, one end of the bidirectional auger 87 passes through the unloading scraper rod 11 and is fixedly connected to a driven sprocket 82, one end of the driven sprocket 82 is rotatably connected to a fixed frame 81, one end of the fixed frame 81 is internally rotatably connected to a toothed disc 84, one end face of the toothed disc 84 is fixedly connected to a transmission sprocket 83, the transmission sprocket 83 is externally connected to a chain 86, and one end of the chain 86 is internally connected to the driven sprocket 82.

[0024] like Figure 6 , Figure 7 and Figure 8 As shown, a rack 85 is installed on the upper wall of the inner cavity of the sealed cabinet 1, and the rack 85 is arranged in a U shape. The rack 85 is meshed and connected with the gear plate 84, and the fixing frame 81 is slidably connected in the inner cavity of the rack 85.

[0025] Specifically, when the unloading scraper rod 11 is driven to move back and forth, the unloading scraper rod 11 will drive the driven sprocket 82 to move synchronously, and at the same time, the driven sprocket 82 drives the fixed frame 81 to slide in the inner cavity of the rack 85, and the fixed frame 81 will also drive the toothed disc 84 to move synchronously, and then the toothed disc 84 cooperates with the rack 85 to rotate. During the rotation of the toothed disc 84, it will drive the transmission sprocket 83 to rotate, and at the same time, the transmission chain 86 rotates, and then the driven sprocket 82 rotates, and then drives the two-way auger 87 to rotate. During the rotation of the two-way auger 87, it will tangle the powder conveyor, and then the powder is evenly discharged into the inner cavity of the additive manufacturing box 7 through the unloading port 12, thereby improving the uniformity of the powder coverage and avoiding the waste caused by excessive discharge of powder.

[0026] like Figure 6 , Figure 8 and Fig. 9 As shown, both ends of the scraper rod 11 are externally rotatably connected with rotating frames 17, a trowel plate 18 is fixed between the rotating frames 17, a torsion spring 30 is fixed inside one side of the rotating frame 17, and one end of the torsion spring 30 is fixed to the scraper rod 11.

[0027] like Figure 5 , Figure 6 and Fig. 9 As shown, one end of the unloading scraper rod 11 is fixedly connected to the support rod 16, and one end of the support rod 16 is internally threaded with a screw rod 22. A groove 21 is opened on the upper wall of the inner cavity of the sealing cabinet 1, and the screw rod 22 is rotatably set in the inner cavity of the groove 21. A micro motor is set inside the upper end of the sealing cabinet 1, and the output shaft end of the micro motor is fixedly connected to the screw rod 22.

[0028] like Figure 3 , Figure 6 and Figure 8 As shown, a storage box 4 is installed on one side of the upper end surface of the sealed cabinet 1, and a plurality of folding material guide pipes 15 are fixedly connected to the lower end of the storage box 4, and one end of the folding material guide pipe 15 is fixedly connected to the feed port 14.

[0029] Specifically, when the powder is used for 3D printing of workpieces, the micro motor is started to drive the screw 22 to rotate, and the screw 22 is threaded to drive the support rod 16 to reciprocate in the inner cavity of the groove 21, so that the support rod 16 drives the unloading scraper rod 11 to move synchronously, so that the unloading scraper rod 11 moves above the additive manufacturing box 7, and during the movement of the unloading scraper rod 11, it will drive the folding guide tube 15 to retract, and then the powder will fall into the temporary storage tank 13 through the folding guide tube 15, and at the same time, the powder is discharged into the additive manufacturing box 7 through the unloading port 12, and when the unloading scraper rod 11 moves above the additive manufacturing box 7, it will drive the rotating frame 17 to move synchronously, and at the same time, the rotating frame 17 drives the smoothing The plate 18 moves above the additive manufacturing box 7, and a torsion spring 30 is fixed to one side of the rotating frame 17. The torsion spring 30 is used to twist the rotating frame 17 to drive the screed plate 18 to fit the upper surface of the additive manufacturing box 7, so that during the movement of the unloading scraper rod 11, the screed plate 18 is used to smooth the powder above the additive manufacturing box 7, and when the unloading scraper rod 11 moves and resets, the screed plate 18 will scrape off the excess powder above the additive manufacturing box 7, thereby solving the problem that after the existing additive manufacturing powder circulation device evenly spreads the powder in the additive manufacturing box, if the excess powder is not scraped and smoothed, the powder will exceed the inner cavity of the additive manufacturing box, causing the size of the printed workpiece to deviate. Embodiment 2

[0030] like Figure 3 and Figure 4 As shown, collecting grooves 9 are provided on both sides of the inner cavity of the sealed cabinet 1, and a vibrating powder recovery component is provided in the inner cavity of the collecting groove 9, and the vibrating powder recovery component includes a screening mesh plate 10 slidably arranged in the inner cavity of the collecting groove 9, and the screening mesh plate 10 is used to collect the workpieces printed by the laser.

[0031] like Figure 3 and Figure 4 As shown, four fixed blocks 27 are rotatably provided on the lower end surface of the screening mesh plate 10, and two fixed blocks 27 form a group and are arranged on both sides of the lower end surface of the screening mesh plate 10, and the lower ends of the fixed blocks 27 are rotatably connected to U-shaped rotating blocks 26, and connecting shafts 25 are rotatably connected between the U-shaped rotating blocks 26, and the U-shaped rotating blocks 26 are rotatably connected to the inner wall of the collecting trough 9, and a driving motor is arranged in one side of the sealing cabinet 1, and the output shaft of the driving motor is fixedly connected to the U-shaped rotating block 26.

[0032] Specifically, after the workpiece is printed using the laser printer head 23, the servo push rod 20 is started to drive the support plate 19 to move upward, and the support plate 19 lifts the powder and moves upward synchronously with the printed workpiece. After the support plate 19 and the additive manufacturing box 7 are at the same level, the unloading scraper 11 is driven to move toward the screening mesh plate 10, and then the unloading scraper 11 pushes the workpiece and the powder onto the screening mesh plate 10, and then the driving motor is started to drive the U-shaped rotating block 26 to rotate, and at the same time, the U-shaped rotating block 26 drives the connecting shaft 25 to rotate synchronously, and the U-shaped rotating block 26 will drive the fixed block 27 during the rotation process. Swinging, at the same time, the fixed block 27 pulls the screening mesh plate 10 to slide up and down in the inner cavity of the collecting tank 9, and then the screening mesh plate 10 drives the workpiece and the powder to shake, and the powder falls into the inner cavity of the collecting tank 9 through the mesh holes of the screening mesh plate 10 for storage, thereby solving the problem that after the existing additive manufacturing powder circulation device has completed printing the workpiece, it is inconvenient to clean and recover the excess powder, and the equipment needs to be in a sealed environment during workpiece processing, resulting in the operator only being able to clean and recover the powder from the workpiece through the jack with rubber gloves, which not only has low cleaning efficiency, but also affects the efficiency of powder recovery and recycling.

[0033] like Figure 2 , Figure 3 and Figure 4 As shown, a sealing cover 6 is rotatably connected to one side of the sealed cabinet 1, a cabinet door 5 is rotatably connected to one side of the sealed cabinet 1, a plug-in box is provided in the inner cavity of the collecting tank 9 for collecting excess powder, a conduit 28 is fixedly connected to one end face of the sealed cabinet 1, and a vacuum machine 29 is fixedly connected to one end of the conduit, and a discharge port of the vacuum machine 29 is connected to the storage box 4.

[0034] like Figure 1 , Figure 2 and Figure 4 As shown, an observation window 2 is provided at one end of the sealed cabinet 1, and a transparent glass cover is provided in the inner cavity of the observation window 2. A distribution box 3 is installed on the upper end surface of the sealed cabinet 1, and the distribution box 3 is used to supply power to the entire additive manufacturing equipment.

[0035] Specifically, after the workpiece is pushed onto the screening mesh plate 10 by the unloading scraper rod 11, the unloading scraper rod 11 is driven to move and reset, and the unloading scraper rod 11 will again lay powder into the additive manufacturing box 7, and at the same time, the vacuum machine 29 is started to extract the powder in the inner cavity of the collecting tank 9, and then the powder is extracted through the conduit 28, and at the same time, the powder is discharged into the storage box 4 through the conduit 28 for recycling, thereby solving the problem that the existing additive manufacturing powder circulation device is inconvenient to quickly recover the powder and draw the powder back into the unloading barrel at the same time, resulting in the inability to recycle the powder without stopping the machine.

[0036] Working principle: the powder is transported into the inner cavity of the temporary storage tank 13 through the feed port 14, and the two-way auger 87 is driven to rotate at the same time, and the two-way auger 87 is used to twist the powder to move to the middle of the inner cavity of the temporary storage tank 13. In the process of the powder moving to the middle of the inner cavity of the temporary storage tank 13, part of the powder will be discharged into the additive manufacturing box 7 through the discharge port 12, and then the discharge scraper 11 is driven to move above the additive manufacturing box 7, and then the powder is evenly discharged into the additive manufacturing box 7 through the discharge port 12. At the same time, during the movement, the discharge scraper 11 can also be used to scrape the powder discharged into the additive manufacturing box 7. The surface of the additive manufacturing box 7 is smoothed, and then the XY axis driving mechanism 24 is started to drive the laser printer head 23 to move, so that the powder in the additive manufacturing box 7 is 3D printed according to the programming to print the required workpiece. After the workpiece base is printed, the servo push rod 20 is started to drive the support plate 19 to move downward, so as to increase the depth of the inner cavity of the additive manufacturing box 7 again, and then the unloading scraper 11 is driven to reciprocate above the additive manufacturing box 7 again, and then a layer of powder is spread in the additive manufacturing box 7 again, and then the laser printer head 23 is used to 3D print it again, and the required workpiece is printed and manufactured in sequence; After the workpiece is printed by the laser printer head 23, the servo push rod 20 is started to drive the support plate 19 to move upward, and the support plate 19 lifts the powder and moves upward synchronously with the printed workpiece. After the support plate 19 and the additive manufacturing box 7 are at the same level, the unloading scraper 11 is driven to move toward the screening mesh plate 10, and then the unloading scraper 11 pushes the workpiece and the powder onto the screening mesh plate 10, and then the driving motor is started to drive the U-shaped rotating block 26 to rotate, and the U-shaped rotating block 26 drives the connecting shaft 25 to rotate synchronously, and the U-shaped rotating block 26 will drive the fixed block 27 to swing during the rotation process, and the fixed block 27 pulls the screening mesh plate 10 to slide up and down in the inner cavity of the collecting tank 9, and then the screening mesh plate 10 drives the workpiece and the powder to shake, and the powder falls into the inner cavity of the collecting tank 9 through the mesh of the screening mesh plate 10 for storage; After the workpiece is pushed onto the screening mesh plate 10 by the unloading scraper rod 11, the unloading scraper rod 11 is driven to move and reset, and the unloading scraper rod 11 will again lay powder into the additive manufacturing box 7, and at the same time, the vacuum machine 29 is started to extract the powder in the inner cavity of the collecting tank 9, and then the powder is extracted through the conduit 28, and at the same time, the powder is discharged into the storage box 4 through the conduit 28 for recycling.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An additive manufacturing powder circulation device, characterized in that: It comprises a sealed cabinet (1), wherein an additive manufacturing box (7) is installed at the bottom of the inner cavity of the sealed cabinet (1), and a material discharge assembly (8) is arranged above the additive manufacturing box (7); The material removal assembly (8) comprises a material removal scraper (11) slidably arranged above the additive manufacturing box (7), a temporary material storage tank (13) is arranged inside the material removal scraper (11), a bidirectional auger (87) is rotatably connected to the inner cavity of the temporary material storage tank (13), two material feed ports (14) are arranged on the upper end surface of the material removal scraper (11), and a plurality of material removal ports (12) are arranged on the lower end surface of the material removal scraper (11); A servo push rod (20) is installed inside the lower end surface of the sealing cabinet (1), a piston rod end of the servo push rod (20) is fixedly connected to a support plate (19), and the support plate (19) is slidably connected in the inner cavity of the additive manufacturing box (7); Both ends of the material scraper rod (11) are externally rotatably connected to a rotating frame (17), a trowel plate (18) is fixedly connected between the rotating frames (17), a torsion spring (30) is fixedly connected to one side of the rotating frame (17), one end of the torsion spring (30) is fixedly connected to the material scraper rod (11), one end of the material scraper rod (11) is fixedly connected to a support rod (16), one end of the support rod (16) is internally threadedly connected to a screw rod (22), a groove (21) is provided on the upper wall of the inner cavity of the sealing cabinet (1), and the screw rod (22) is rotatably arranged in the inner cavity of the groove (21), a micro motor is arranged inside the upper end of the sealing cabinet (1), and the output shaft end of the micro motor is fixedly connected to the screw rod (22).

2. The additive manufacturing powder circulation device according to claim 1, characterized in that: One end of the bidirectional auger (87) passes through the unloading scraper rod (11) and is fixedly connected to a driven sprocket (82); one end of the driven sprocket (82) is rotatably connected to a fixing frame (81); one end of the fixing frame (81) is internally rotatably connected to a toothed disc (84); one end surface of the toothed disc (84) is fixedly connected to a transmission sprocket (83); the transmission sprocket (83) is externally transmission-connected to a chain (86); and one end of the chain (86) is internally transmission-connected to the driven sprocket (82).

3. The additive manufacturing powder circulation device according to claim 2, characterized in that: A rack (85) is installed on the upper wall of the inner cavity of the sealed cabinet (1), and the rack (85) is arranged in a U shape. The rack (85) is meshedly connected with the toothed disc (84), and the fixing frame (81) is slidably connected in the inner cavity of the rack (85).

4. The additive manufacturing powder circulation device according to claim 1, characterized in that: A storage box (4) is installed on one side of the upper end surface of the sealed cabinet (1), and a plurality of folding material guide pipes (15) are fixedly connected to the lower end of the storage box (4), and one end of the folding material guide pipe (15) is fixedly connected to the feed port (14).

5. The additive manufacturing powder circulation device according to claim 1, characterized in that: Collection slots (9) are provided on both sides of the inner cavity of the sealed cabinet (1); a vibrating powder recovery component is provided in the inner cavity of the collection slot (9); and the vibrating powder recovery component comprises a screening mesh plate (10) slidably arranged in the inner cavity of the collection slot (9); and the screening mesh plate (10) is used to collect workpieces printed by laser.

6. The additive manufacturing powder circulation device according to claim 5, characterized in that: Four fixed blocks (27) are fixedly connected to the lower end surface of the screening mesh plate (10), and two of the fixed blocks (27) form a group and are arranged on both sides of the lower end surface of the screening mesh plate (10). The lower ends of the fixed blocks (27) are rotatably connected to U-shaped rotating blocks (26), and connecting shafts (25) are rotatably connected between the U-shaped rotating blocks (26). The U-shaped rotating blocks (26) are rotatably connected to the inner wall of the collecting tank (9). A driving motor is arranged in one side of the sealing cabinet (1), and the output shaft of the driving motor is fixedly connected to the U-shaped rotating block (26).

7. The additive manufacturing powder circulation device according to claim 5, characterized in that: A sealing cover (6) is rotatably connected to one side of the sealed cabinet (1), a cabinet door (5) is rotatably connected to one side of the sealed cabinet (1), an insert box is provided in the inner cavity of the collection tank (9) for collecting excess powder, a conduit (28) is fixedly connected to one end face of the sealed cabinet (1), and a vacuum machine (29) is fixedly connected to one end of the conduit, and a discharge port of the vacuum machine (29) is connected to the storage box (4).

8. The additive manufacturing powder circulation device according to claim 1, characterized in that: An observation window (2) is provided at one end of the sealed cabinet (1), and a transparent glass cover is provided in the inner cavity of the observation window (2). A distribution box (3) is installed on the upper end surface of the sealed cabinet (1), and the distribution box (3) is used to supply power to the entire additive manufacturing equipment.

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