Automatic large-particle dust screening device and method for metal 3D printer

Abstract

The invention discloses an automatic large-particle dust screening device and method for a metal 3D printer, and relates to the field of metal 3D printing and filter plates, the automatic large-particle dust screening device comprises an annular frame and a grating plate fixedly mounted in the annular frame, a supporting ring is fixedly mounted in the annular frame, a filter screen is fixedly mounted in the supporting ring, and a cylinder is fixedly mounted on the grating plate; a driving motor is fixedly installed at the top of the cylinder, the output end of the driving motor is fixedly connected with a rotating shaft, and one end of the rotating shaft is fixedly connected with a supporting plate. Mainly through the arrangement of a cleaning plate, a filter screen can filter and screen large-particle dust drifting away or falling into a pipeline, when the large-particle dust screened out on the filter screen is removed, a driving motor can drive the cleaning plate to move synchronously, and when the cleaning plate moves, the large-particle dust screened out on the filter screen can be scraped away; and under the centrifugal effect, the dust is recycled into the storage box on the annular frame, so that the purpose of automatic screening and removing is achieved, the labor intensity is reduced, and the operation risk is reduced.

Description

Technical Field

[0001] This invention patent relates to the technical fields of metal 3D printing and filter plates, and specifically to an automatic large-particle dust screening device for metal 3D printers. Background Art

[0002] The automatic large-particle dust screening device for metal 3D printers is used to filter out large-particle dust generated during the printing process, preventing the risk of explosion due to incomplete wetting of the dust when cleaning the dust recovery barrel and pipeline. This not only reduces environmental pollution but also ensures the safety of the operator.

[0003] However, the existing metal 3D printers only have filters that are fixedly installed and replaced regularly. The filter is directly connected to the dust recovery barrel by a long and narrow pipeline. It is necessary to separate the dust recovery barrel from the pipeline regularly, and then wet the dust recovery barrel and the dust inside. However, it is found that there are some large-particle dusts in the dust recovery barrel. When the large-particle dust is wetted, usually only the surface is wetted, which easily leads to incomplete wetting of the large-particle dust. Then there is a potential risk of explosion during the flow process. Moreover, when there is too much large-particle dust, it is easy to block the interface between the pipeline and the dust recovery barrel, and manual cleaning of the pipeline interface is required, which greatly increases the labor intensity. Summary of the Invention

[0004] The technical problem solved by this application is: overcoming the deficiencies of the prior art, providing an automatic large-particle dust screening device for metal 3D printers to solve the problem of inconvenient automatic removal of large-particle dust proposed in the above background art.

[0005] The applicant has found through research that due to a certain length of pipeline between the filter and the dust recovery barrel, after the dust is filtered by the filter, large-particle dust will inevitably be generated in the pipeline due to aggregation and other effects during long-term use; by reducing the large-particle dust generated in the pipeline from entering the dust recovery barrel, the content of large-particle dust in the dust recovery barrel can be greatly reduced.

[0006] The technical solution provided by this application is as follows:

[0007] An automatic large-particle dust screening device for metal 3D printers, installed on the inner wall of the end of the pipeline, the end of the pipeline is connected to the dust recovery barrel, and includes:

[0008] An annular frame;

[0009] A support ring, fixedly installed inside the annular frame;

[0010] A filter screen; fixedly installed inside the support ring;

[0011] The grille plate is fixedly installed inside the annular frame. A scraping device is installed on the grille plate, and the scraping device is used to scrape large-particle dust on the surface of the filter screen facing the inside of the pipeline.

[0012] Further, the scraping device includes a rotating shaft, a support plate, and a cleaning plate. The rotating shaft is rotatably connected to the grille plate, and the rotating shaft is coaxial with the support ring. One end of the rotating shaft facing the filter screen is fixedly connected with a support plate, and cleaning plates are symmetrically connected to the support plate. The cleaning plates are in contact with the surface of the filter screen; the rotating shaft is driven to rotate by a driving motor, and the driving motor is fixedly connected to the grille plate.

[0013] Further, fixing components are arranged on the circumference of the annular frame, and the fixing components are used to detachably install the annular frame inside the pipeline.

[0014] Further, the fixing components include a storage box, a clamping block, and a telescopic rod. A plurality of mounting holes are arranged on the circumference of the annular frame, and the storage box is installed in the mounting holes. The storage box is located between the grille plate and the filter screen; a through groove is arranged on the storage box, and the through groove is arranged along the radial direction of the annular frame. The clamping block is arranged in the through groove. One end of the telescopic rod is connected to the bottom of the through groove, and the other end is connected to the clamping block. The telescopic rod is used to drive the clamping block to extend and retract along the radial direction of the annular frame; a clamping groove matched with the clamping block is arranged on the inner wall of the pipeline so that the clamping block can extend and be inserted into the clamping groove.

[0015] Further, the storage box is provided with a hollow structure at the bottom of the through groove, and the hollow structure communicates the inside of the through groove with the inner space of the annular frame.

[0016] Further, both the telescopic rod and the driving motor are connected to an external controller to control the extension and retraction of the telescopic rod and the opening and closing of the driving motor through the external controller.

[0017] A screening method for a large-particle dust automatic screening device of a metal 3D printer includes:

[0018] Keep the dust collection bucket not connected to the end of the pipeline, keep the clamping block in the retracted state, place the annular frame inside the pipeline, align the clamping block with the clamping groove, then control the clamping block to extend, and then connect the dust collection bucket to the end of the pipeline;

[0019] After dust removal of the metal 3D printer through the pipeline for a set time, disconnect the dust collection bucket from the end of the pipeline, then keep the clamping block in the retracted state, remove the annular frame from the pipeline, soak and wash the whole annular frame, dry it after the large-particle dust is washed off, and soak and transfer the dust in the dust collection bucket.

[0020] Compared with the prior art, the beneficial effects of this invention patent are:

[0021] 1. In this invention patent, when using the automatic screening device for large particle dust of a metal 3D printer to remove the sintered large particle dust through the setting of a cleaning plate, the annular frame is placed at the pipe interface. When air flows, the filter screen will filter and screen the large particle dust floating into the pipe. When removing the large particle dust adsorbed on the filter screen, the external controller is used to control the driving motor to work. The driving motor will drive the rotating shaft to move. When the rotating shaft moves, it will drive the support plate to move. When the support plate moves, it will drive the cleaning plate to move synchronously. When the cleaning plate moves, it will scrape the large particle dust screened on the filter screen and recycle it into the storage box on the annular frame under the centrifugal force, thus achieving the purpose of automatic screening and removal, reducing the labor intensity and lowering the operation risk.

[0022] 2. In this invention patent, when installing the automatic screening device for large particle dust of a metal 3D printer through the setting of a clamping block, after placing the annular frame at the pipe interface, the telescopic rod is made to work to push the clamping block to move. After one end of the clamping block moves into the preset clamping groove inside the pipe through the through groove, it will fix the position of the annular frame, thus achieving the purpose of quickly installing the automatic screening device for large particle dust of a metal 3D printer and improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of this invention patent;

[0024] Figure 2 is a three-dimensional structural schematic diagram of the annular frame of this invention patent;

[0025] Figure 3 is a three-dimensional structural schematic diagram of the cleaning plate of this invention patent;

[0026] Figure 4 is a three-dimensional structural schematic diagram of a cylinder;

[0027] Figure 5 is a three-dimensional structural schematic diagram of a storage box.

[0028] In the figure: 1, annular frame; 2, grid plate; 3, support ring; 4, filter screen; 5, cylinder; 6, through hole; 7, driving motor; 8, rotating shaft; 9, support plate; 10, cleaning plate; 11, storage box; 12, through groove; 13, clamping block; 14, telescopic rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe in detail the disclosed embodiments of the present invention with reference to the accompanying drawings.

[0030] Embodiment 1

[0031] As Figure 1 andFigure 2 As shown in the figure, an automatic screening device for large-particle dust of a metal 3D printer is installed on the inner wall of the end of a pipeline. The end of the pipeline is vertically arranged and connected to a dust recovery bucket. The automatic screening device includes an annular frame 1 and a grille plate 2 fixedly installed inside the annular frame 1. A support ring 3 is fixedly installed inside the annular frame 1, and a filter screen 4 is fixedly installed inside the support ring 3. After the annular frame 1 is installed at the end of the pipeline, the grille plate 2 is located on the side of the filter screen 4 facing the inside of the pipeline; as Figure 3 and Figure 4 shown in the figure, a cylinder 5 is fixedly installed on the grille plate 2. A driving motor 7 is fixedly installed at the top of the cylinder 5. The output end of the driving motor 7 is fixedly connected to a rotating shaft 8. One end of the rotating shaft 8 is fixedly connected to a support plate 9. Cleaning plates 10 are symmetrically connected to the support plate 9, and the cleaning plates 10 are in contact with the inner surface of the filter screen 4.

[0032] When using the automatic screening device for large-particle dust of a metal 3D printer to filter the sintered large-particle dust, the annular frame 1 is installed in the pipeline interface. When air flows, the filter screen 4 will filter and screen the large-particle dust floating into the pipeline; and the driving motor 7 is controlled to work by an external controller. The driving motor 7 will drive the rotating shaft 8 to move. When the rotating shaft 8 moves, it will drive the support plate 9 to move. When the support plate 9 moves, it will drive the cleaning plates 10 to move synchronously. When the cleaning plates 10 move, they will scrape the large-particle dust screened on the filter screen 4, realizing the removal of the large-particle dust screened on the filter screen 4, thereby achieving the purpose of automatically removing large-particle dust, reducing the labor intensity, and reducing the operation risk.

[0033] A through hole 6 is arranged inside the cylinder 5, and the rotating shaft 8 is arranged inside the through hole 6. The through hole 6 facilitates the rotation of the rotating shaft 8.

[0034] The grille plate 2 is circular. Another layer of grille plate 2 is connected to the outside of the filter screen 4 away from the pipeline of the annular frame 1. The scraping device is not arranged on this layer of grille plate 2. This layer of grille plate 2 is mainly used to maintain the shape of the annular frame 1. Secondly, it can further adhere to dust and reduce the entry into the inside of the annular frame 1.

[0035] Embodiment 2

[0036] As Figure 1 and Figure 5 shown in the figure, an automatic screening device for large-particle dust of a metal 3D printer proposed in this invention patent, compared with Embodiment 1, as another implementation manner of this invention patent, a storage box 11 is inlaid in the circumferential direction of the annular frame 1, that is, a plurality of installation holes are arranged in the circumferential direction of the annular frame 1, the storage box 11 is arranged in the installation holes, the storage box 11 is located between the grille plate 2 and the filter screen 4, the annular frame 1 provides an installation space for the storage box 11, and the storage box 11 is square.

[0037] The storage box 11 is provided with a through groove 12 which is arranged along the radial direction of the annular frame 1. The through groove 12 is square in shape and provides an installation space for the clamping block 13. An expansion rod 14 is fixedly installed inside the storage box 11, and the storage box 11 provides an installation space for the expansion rod 14. The clamping block 13 is inserted into the inside of the through groove 12. One end of the expansion rod 14 is fixedly connected to the outer wall of the clamping block 13, and the other end is installed at the bottom of the through groove 12. The expansion rod 14 is an electric push rod, and its power supply can be a battery arranged on the storage box 11. The expansion rod 14 is used to drive the clamping block 13 to move along the radial direction of the annular frame 1. When installing the dust filter plate for the metal 3D printer, after placing the annular frame 1 at the pipe interface, making the expansion rod 14 work will push the clamping block 13 to move. After one end of the clamping block 13 moves through the through groove 12 and enters the preset clamping groove inside the pipe, the position of the annular frame 1 will be fixedly installed, thereby achieving the purpose of quickly installing the dust filter plate for the metal 3D printer and improving the installation efficiency.

[0038] The storage box 11 is provided with a hollow structure at the bottom of the through groove 12. The hollow structure connects the inside of the through groove 12 with the internal space of the annular frame 1, so that the inside of the storage box 11 integrates a large particle dust recovery space. When the cleaning plate 10 rotates to scrape the large particle dust on the filter screen 4, the centrifugal force generated by the rotation of the cleaning plate 10 brings the large particle dust into the through groove 12 of the storage box 11 or onto the surface of the support ring 3.

[0039] And since the entire annular frame 1 is detachable from the pipe, when the annular frame 1 and the storage box 11 are detached as a whole, they are soaked and rinsed, so that the large particle dust is washed away, and finally they can be dried and reinstalled into the pipe to continue dust removal.

[0040] Furthermore, both the expansion rod 14 and the drive motor 7 are electrically connected to an external controller.

[0041] Working principle: When using the large particle dust automatic screening device for the metal 3D printer, first, when installing the large particle dust automatic screening device for the metal 3D printer, after placing the annular frame 1 at the pipe interface, making the expansion rod 14 work will push the clamping block 13 to move. After one end of the clamping block 13 moves through the through groove 12 and enters the preset clamping groove inside the pipe, the position of the annular frame 1 will be fixedly installed, thereby achieving the purpose of quickly installing the large particle dust automatic screening device for the metal 3D printer and improving the installation efficiency.

[0042] Finally, when using the automatic screening device for large particle dust of a metal 3D printer to filter the sintered large particle dust, place the annular frame 1 at the pipe interface. When air flows, the filter screen 4 will filter and screen the dust floating into the pipe. When removing the large particle dust screened on the filter screen 4, control the driving motor 7 to work through an external controller. The driving motor 7 will drive the rotating shaft 8 to move. When the rotating shaft 8 moves, it will drive the support plate 9 to move. When the support plate 9 moves, it will drive the cleaning plate 10 to move synchronously. When the cleaning plate 10 moves, it will scrape the dust screened on the filter screen 4, thereby achieving the purpose of automatically removing the screened dust, reducing the labor intensity, and eliminating the need for manual frequent removal of large particle dust.

[0043] This is the working principle of the automatic screening device for large particle dust used in a metal 3D printer.

[0044] The content not described in detail in this application specification belongs to the well-known technology of those skilled in the art.

[0045] The above has described this application in detail in combination with specific implementation manners and exemplary examples, but these descriptions should not be construed as limitations on this application. Those skilled in the art understand that without departing from the spirit and scope of this application, various equivalent replacements, modifications, or improvements can be made to the technical solutions and their implementation manners of this application, and all of these fall within the scope of this application. The protection scope of this application is subject to the appended claims.

Claims

1. An automatic screening device for large-particle dust in a metal 3D printer, characterized in that, Installed on the inner wall of the end of the pipeline, the end of the pipeline is connected to the dust recovery bucket, including: Ring frame (1); Support ring (3), fixedly installed inside the ring frame (1); Filter screen (4); fixedly installed inside the support ring (3); Grille plate (2), fixedly installed inside the ring frame (1), a scraping device is installed on the grille plate (2), and the scraping device is used to scrape large particle dust on the surface of the filter screen (4) facing the inside of the pipeline.

2. The automatic screening device for large particle dust of a metal 3D printer according to claim 1, characterized in that: The scraping device includes a rotating shaft (8), a support plate (9) and a cleaning plate (10). The rotating shaft (8) is rotatably connected to the grille plate (2), the rotating shaft (8) is coaxial with the support ring (3), and one end of the rotating shaft (8) facing the filter screen (4) is fixedly connected with the support plate (9). The support plate (9) is symmetrically connected with the cleaning plate (10), and the cleaning plate (10) is in contact with the surface of the filter screen (4); the rotating shaft (8) is driven to rotate by a driving motor (7), and the driving motor (7) is fixedly connected to the grille plate (2).

3. The automatic screening device for large particle dust of a metal 3D printer according to claim 1, characterized in that: The grille plate (2) is circular, and a layer of grille plate (2) is also connected to the outer side of the ring frame (1) where the filter screen (4) is away from the pipeline.

4. An automatic screening device for large-particle dust in a metal 3D printer according to claim 1, characterized in that: A fixing component is arranged on the circumference of the ring frame (1), and the fixing component is used to detachably install the ring frame (1) inside the pipeline.

5. The automatic screening device for large-particle dust of a metal 3D printer according to claim 4, characterized in that: The fixing component includes a storage box (11), a clamping block (13) and a telescopic rod (14). A plurality of mounting holes are arranged on the circumference of the ring frame (1), and the storage box (11) is installed in the mounting holes. The storage box (11) is located between the grille plate (2) and the filter screen (4); a through groove (12) is arranged on the storage box (11), and the through groove (12) is arranged along the radial direction of the ring frame (1). The clamping block (13) is arranged in the through groove (12), one end of the telescopic rod (14) is connected to the bottom of the through groove (12), and the other end is connected to the clamping block (13). The telescopic rod (14) is used to drive the clamping block (13) to extend and retract along the radial direction of the ring frame (1); a clamping groove matching with the clamping block (13) is arranged on the inner wall of the pipeline, so that the clamping block (13) extends and is clamped into the clamping groove.

6. The automatic screening device for large particle dust of a metal 3D printer according to claim 5, characterized in that: The storage box (11) is provided with a hollow structure at the bottom of the through groove (12), and the hollow structure communicates the inside of the through groove (12) with the internal space of the ring frame (1).

7. An automatic screening device for large particle dust of a metal 3D printer according to claim 1, characterized in that: The telescopic rod (14) and the driving motor (7) are both connected to an external controller to control the telescopic movement of the telescopic rod (14) and the opening and closing of the driving motor (7) through the external controller.

8. A screening method for a large-particle dust automatic screening device for a metal 3D printer according to any one of claims 1-7, characterized in that, Including: Disconnect the dust recovery bucket from the end of the pipeline, retract the clamping block (13), place the ring frame (1) inside the pipeline, align the clamping block (13) with the clamping groove, then control the clamping block (13) to extend, and then connect the dust recovery bucket to the end of the pipeline; After the metal 3D printer is dusted through the pipeline for a set time, disconnect the dust recovery bucket from the end of the pipeline, then retract the clamping block (13), remove the ring frame (1) from the pipeline, soak and wash the whole ring frame (1). After the large particle dust is washed off, dry it, and soak and transfer the dust in the dust recovery bucket.

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