Online monitoring device for selective laser melting pool

Abstract

The utility model provides an on-line monitoring device for a selective laser melting pool, which relates to the technical field of on-line monitoring devices for melting pools, and comprises a 3D printer shell, a monitoring station arranged in the 3D printer shell, two brushes arranged above the monitoring station, two cameras arranged above the monitoring station, transparent sealing covers arranged on one sides of the two cameras, electromagnets are arranged on the two sides of the 3D printer shell, and a supporting block is arranged in the 3D printer shell; the dust sweeping assembly is arranged in the 3D printer shell and used for cleaning the surface of the transparent sealing cover; and the mounting assembly is arranged between the 3D printer shell and the monitoring station, so that mounting of the monitoring device is facilitated. According to the monitoring device, through the arrangement of the dust sweeping assembly, powder and stains on the surface of the lens can be cleaned, the output definition of videos or images is ensured, and through the arrangement of the mounting assembly, the mounting and dismounting processes of the online monitoring device for the selective laser melting pool can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of molten pool online monitoring devices, in particular to a selective laser melting molten pool online monitoring device. Background Art

[0002] Selective laser melting technology is a 3D printing technology that can directly form high-density, high-precision parts. Its working principle is that the laser beam selectively melts each layer of metal powder material and gradually stacks it into a three-dimensional metal part. Before the laser beam starts scanning, the powder spreading device pushes the metal powder flat onto the substrate of the processing chamber in advance, and then the laser beam selectively melts the powder on the substrate according to the contour information of the current layer, thereby processing the contour of the current layer. This process is repeated layer by layer until the entire part is formed. During the entire selective laser melting process, the forming quality of the part is affected by multiple factors such as scanning speed, scanning spacing, processing layer thickness, scanning path, spot compensation, laser power and density. Therefore, under such a complex process, in order to obtain high-quality molded parts, a series of key parameters in the selective laser melting process must be monitored. The selective laser melting molten pool online monitoring device is a device specially designed for real-time monitoring of the state of the metal powder molten pool during the selective laser melting process, and is mainly used in selective laser melting metal 3D printing equipment.

[0003] However, the existing online monitoring devices for selective laser melting molten pools still have certain defects when in use. For example, during the powder spreading stage, powder particles may be suspended in the air for a short time. These suspended powder particles will adhere to the front of the camera lens, affecting the clarity of the image or video output. In addition, the existing online monitoring devices for selective laser melting molten pools are mostly fixed by bolts and nuts, and the installation and disassembly process is relatively cumbersome. Utility Model Content

[0004] The utility model aims to solve the shortcomings existing in the background technology and provides an online monitoring device for selective laser melting molten pool. In order to solve the above-mentioned problems, by setting a dust sweeping component, powder and stains on the lens surface can be cleaned to ensure the clarity of video or image output, and by setting an installation component, the installation and disassembly process of the online monitoring device for selective laser melting molten pool can be simplified.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an online monitoring device for a selective laser melting molten pool, comprising: a 3D printer housing, a monitoring platform is provided inside the 3D printer housing, two brushes are provided above the monitoring platform, two cameras are provided above the monitoring platform, a transparent cover is provided on one side of the two cameras, electromagnets are provided on both sides of the 3D printer housing, a support block is provided inside the 3D printer housing, a dust sweeping component provided inside the 3D printer housing, which is used to clean the surface of the transparent cover, and an installation component provided between the 3D printer housing and the monitoring platform, which is convenient for the installation of the monitoring device.

[0006] Furthermore, the dust sweeping assembly includes: a slot opened on the upper surface of the support block, two servo motors are provided on the top of the support block, and the two servo motors are symmetrically arranged about the monitoring platform, an annular retaining ring fixedly connected to the outside of the monitoring platform, the annular retaining ring is slidably connected to the slot, a plurality of teeth are provided on the top of the annular retaining ring, two cleaning brackets are arranged on the top of the monitoring platform, the tops of the two cleaning brackets are respectively fixedly connected to the two brushes, two U-shaped blocks are provided on the upper surface of the monitoring platform, placement grooves are provided inside the two U-shaped blocks, a collection box is provided inside the placement groove, a servo motor is provided on one side of the two U-shaped blocks, the tops of the two servo motors are connected to camera brackets through rotating shafts, and the two camera brackets are respectively fixedly connected to the cameras, and a detection hole is provided in the center of the monitoring platform.

[0007] Furthermore, the two cleaning brackets, the two U-shaped blocks and the two servo motors are all symmetrically arranged about the detection hole.

[0008] Furthermore, one side of the two servo motors is connected with a gear through a rotating shaft, and the gear is meshed with teeth on the annular retaining ring.

[0009] Furthermore, a plurality of balls are arranged inside the slot, and the plurality of balls are located at the bottom of the annular clamping ring.

[0010] Furthermore, both sides of the inner walls of the two placement grooves are provided with limiting grooves, and both sides of the two collection boxes are provided with clamping blocks, and the clamping blocks are slidably connected to the limiting grooves.

[0011] Further, the mounting assembly includes: a U-shaped limit bar arranged at the top of the 3D printer housing, and the two electromagnets are respectively located on both sides of the inner wall of the U-shaped limit bar, a printer head is arranged on the top of the inner wall of the 3D printer housing, and connecting blocks are arranged on both sides of the inner wall of the 3D printer housing, and the two connecting blocks are fixedly connected with iron blocks on one side facing the 3D printer housing, and the two electromagnets are respectively magnetically connected to the two iron blocks, and two electric telescopic rods are arranged inside the 3D printer housing, and the tops of the two electric telescopic rods are respectively fixedly connected to the two connecting blocks, and the bottom ends of the two electric telescopic rods are fixedly connected to the support blocks.

[0012] The utility model provides an online monitoring device for selective laser melting molten pool, which has the following beneficial effects:

[0013] The utility model has the advantages that, by setting the dust sweeping component, the powder and stains on the lens surface can be cleaned during the operation of the equipment, thereby ensuring the clarity of the video or image output, ensuring the accuracy of the molten pool monitoring, and improving the production efficiency;

[0014] Secondly, by setting the electromagnet and iron block in the installation component, the selective laser melting molten pool online monitoring device can be quickly fixed, simplifying the installation and disassembly process, facilitating the maintenance and upgrading of the selective laser melting molten pool online monitoring device, and saving time and manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model.

[0016] Figure 2 It is a sectional view of the overall structure of the utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the monitoring station of the utility model.

[0018] Figure 4 This is a schematic diagram of the brush structure of the utility model.

[0019] Figure 5 For the utility model Figure 2 Enlarged view of point A in .

[0020] Figure 6 For the utility model Figure 2 Enlarged view of point B in .

[0021] Figure 1-6In: 1. 3D printer housing; 101. printer head; 2. support block; 201. card slot; 3. monitoring platform; 301. detection hole; 302. annular retaining ring; 303. ball bearing; 4. servo motor; 401. gear; 5. cleaning bracket; 501. brush; 6. card block; 601. collection box; 602. card block; 603. limit slot; 604. placement slot; 7. servo motor; 701. camera bracket; 702. camera; 703. transparent cover; 8. U-shaped limit strip; 801. electromagnet; 802. connecting block; 803. iron block; 804. electric telescopic rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0023] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0024] The embodiment of the present application provides an online monitoring device for a selective laser melting molten pool. The online monitoring device for a selective laser melting molten pool can clean the powder and stains on the lens surface through the setting of a dust sweeping component to ensure the clarity of the video or image output, and can simplify the installation and disassembly process of the online monitoring device for a selective laser melting molten pool through the setting of an installation component. The online monitoring device for a selective laser melting molten pool is described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0025] The present application is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Example 1

[0027] See also Figure 1-6In the embodiment, a selective laser melting molten pool online monitoring device is provided, comprising: a 3D printer housing 1, a monitoring platform 3 is arranged inside the 3D printer housing 1, two brushes 501 are arranged above the monitoring platform 3, two cameras 702 are arranged above the monitoring platform 3, and transparent covers 703 are arranged on one side of the two cameras 702, electromagnets 801 are arranged on both sides of the 3D printer housing, and a support block 2 is arranged inside the 3D printer housing 1; a dust sweeping component arranged inside the 3D printer housing 1, which is used to clean the surface of the transparent cover 703; and an installation component arranged between the 3D printer housing 1 and the monitoring platform 3, which is convenient for the installation of the monitoring device.

[0028] Among them, by setting up the dust sweeping component, the powder and stains on the lens surface can be cleaned during the operation of the equipment, ensuring the clarity of video or image output, ensuring the accuracy of molten pool monitoring, and improving production efficiency;

[0029] Secondly, by installing the electromagnet 801 and the iron block 803 in the assembly, the selective laser melting molten pool online monitoring device can be quickly fixed, simplifying the installation and disassembly process, facilitating the maintenance and upgrading of the selective laser melting molten pool online monitoring device, and saving time and manpower.

[0030] Example 2

[0031] On the basis of Example 1, the dust sweeping assembly includes: a slot 201 opened on the upper surface of the support block 2, two servo motors 4 are arranged on the top of the support block 2, and the two servo motors 4 are symmetrically arranged about the monitoring platform 3; an annular snap ring 302 fixedly connected to the outer side of the monitoring platform 3, the annular snap ring 302 is slidably connected to the slot 201, and a plurality of teeth are arranged on the top of the annular snap ring 302; two cleaning brackets 5 are arranged on the top of the monitoring platform 3, and the tops of the two cleaning brackets 5 are respectively fixedly connected to the two brushes 501, two U-shaped blocks 6 are arranged on the upper surface of the monitoring platform 3, and the two U-shaped blocks 6 are provided with placement grooves 604 inside, and the placement grooves 604 are provided with a collection box 601 inside, and one side of the two U-shaped blocks 6 is provided with a servo motor 7, and the tops of the two servo motors 7 are connected to the camera bracket 701 through a rotating shaft, and the two camera brackets 701 are respectively fixedly connected to the camera 702, and a detection hole 301 is opened in the center of the monitoring platform 3; the two cleaning brackets 5, the two U-shaped blocks 6, and the two servo motors 7 are symmetrically arranged about the detection hole 301.

[0032] Among them, one side of the two servo motors 4 is connected with a gear 401 through a rotating shaft, and the gear 401 is meshed with the teeth on the annular retaining ring 302; a plurality of balls 303 are arranged inside the retaining groove 201, and the plurality of balls 303 are located at the bottom of the annular retaining ring 302; limiting grooves 603 are provided on both sides of the inner walls of the two placement grooves 604, and blocks 602 are provided on both sides of the two collection boxes 601, and the blocks 602 are slidably connected with the limiting grooves 603.

[0033] When in use, the user can control the extension and retraction of the electric telescopic rod 804, adjust the camera 702 to a suitable height, and then turn on the two servo motors 4 and the camera 702. The two servo motors 4 drive the annular clamping ring 302 and the monitoring platform 3 to rotate along the card slot 201, thereby driving the two cameras 702 on the top of the monitoring platform 3 to rotate, and then the two cameras 702 are used to monitor the part printing status from different angles.

[0034] During the powder spreading stage, when powder particles adhere to the transparent cover 703 and affect the clarity of the image output by the camera 702, the operator can start the two servo motors 7 on the upper surface of the monitoring platform 3, so that the two servo motors 7 drive the camera bracket 701, the camera 702 and the transparent cover 703 to rotate through the rotating shaft, and rub against the soft bristles on the brush 501, so as to clean the metal powder on the transparent cover 703. In addition, a collection box 601 is provided under the two brushes 501, and the collection box 601 can collect the metal powder cleaned by the brush 501, so as to facilitate the cleaning of the metal powder and reduce the accumulation of the metal powder.

[0035] Example 3

[0036] On the basis of Example 1, the mounting assembly includes: a U-shaped limit bar 8 arranged at the top of the 3D printer housing 1, and two electromagnets 801 are respectively located on both sides of the inner wall of the U-shaped limit bar 8, and a printer head 101 is arranged at the top of the inner wall of the 3D printer housing 1; connecting blocks 802 are arranged on both sides of the inner wall of the 3D printer housing 1, and the two connecting blocks 802 are fixedly connected with iron blocks 803 on one side facing the 3D printer housing 1, and the two electromagnets 801 are respectively magnetically connected to the two iron blocks 803, and two electric telescopic rods 804 are arranged inside the 3D printer housing 1, and the tops of the two electric telescopic rods 804 are respectively fixedly connected to the two connecting blocks 802, and the bottom ends of the two electric telescopic rods 804 are fixedly connected to the support block 2.

[0037] When in use, the operator can insert the U-shaped limit bar 8 into the top of the 3D printer housing 1, and make the electromagnet 801 fit with the two sides of the 3D printer housing 1, and then put the detection device into the interior of the 3D printer housing 1, and move the electromagnet 801 on one side of the two iron blocks 803 to the position corresponding to the electromagnet 801, and then energize the electromagnet 801 to make the electromagnet 801 generate magnetism, thereby sucking the iron block 803, and then fixing the monitoring device inside the 3D printer housing 1.

[0038] In addition, a control panel is provided on one side of the 3D printer housing 1 , and the control panel can control the opening and closing of the electromagnet 801 , the servo motor 4 , the camera 702 , the electric telescopic rod 804 and the servo motor 7 .

[0039] The control program involved in the present utility model can be implemented by those skilled in the art according to the same or similar principles in the prior art, and this part is not the innovation of the present utility model.

[0040] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] The above is a detailed introduction to an online monitoring device for a selective laser melting molten pool provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An online monitoring device for selective laser melting molten pool, characterized in that: include: A 3D printer housing (1), wherein a monitoring platform (3) is provided inside the 3D printer housing (1), two brushes (501) are provided above the monitoring platform (3), two cameras (702) are provided above the monitoring platform (3), and transparent covers (703) are provided on one side of the two cameras (702), electromagnets (801) are provided on both sides of the 3D printer housing, and a support block (2) is provided inside the 3D printer housing (1); A dust sweeping assembly disposed inside the 3D printer housing (1) and used for cleaning the surface of the transparent cover (703); and The mounting assembly provided between the 3D printer housing (1) and the monitoring platform (3) facilitates the installation of the monitoring device.

2. The selective laser melting molten pool online monitoring device according to claim 1 is characterized in that: The dust sweeping assembly comprises: A slot (201) is provided on the upper surface of the support block (2); two servo motors (4) are provided on the top of the support block (2), and the two servo motors (4) are symmetrically arranged with respect to the monitoring platform (3); an annular snap ring (302) fixedly connected to the outside of the monitoring platform (3), the annular snap ring (302) being slidably connected to the snap groove (201), and a plurality of teeth being provided on the top of the annular snap ring (302); Two cleaning brackets (5) are arranged on the top of the monitoring platform (3), and the tops of the two cleaning brackets (5) are respectively fixedly connected to the two brushes (501). Two U-shaped blocks (6) are arranged on the upper surface of the monitoring platform (3), and placement grooves (604) are arranged inside the two U-shaped blocks (6). A collection box (601) is arranged inside the placement groove (604). A servo motor (7) is arranged on one side of the two U-shaped blocks (6), and the tops of the two servo motors (7) are matched and connected to camera brackets (701) via rotating shafts, and the two camera brackets (701) are respectively fixedly connected to the cameras (702). A detection hole (301) is arranged in the center of the monitoring platform (3).

3. The selective laser melting molten pool online monitoring device according to claim 2 is characterized in that: The two cleaning brackets (5), the two U-shaped clamping blocks (6) and the two servo motors (7) are all symmetrically arranged with respect to the detection hole (301).

4. The selective laser melting molten pool online monitoring device according to claim 2 is characterized in that: One side of the two servo motors (4) is matched with a gear (401) via a rotating shaft, and the gear (401) is meshedly connected with teeth on the annular retaining ring (302).

5. The selective laser melting molten pool online monitoring device according to claim 2, characterized in that: A plurality of rolling balls (303) are arranged inside the clamping groove (201), and the plurality of rolling balls (303) are all located at the bottom of the annular clamping ring (302).

6. The selective laser melting molten pool online monitoring device according to claim 2 is characterized in that: Limiting grooves (603) are provided on both sides of the inner walls of the two placement grooves (604), and clamping blocks (602) are provided on both sides of the two collection boxes (601), and the clamping blocks (602) are slidably connected to the limiting grooves (603).

7. The selective laser melting molten pool online monitoring device according to claim 1 is characterized in that: The installation assembly includes: A U-shaped limit strip (8) is arranged on the top of the 3D printer housing (1), and the two electromagnets (801) are respectively located on both sides of the inner wall of the U-shaped limit strip (8), and a printer head (101) is arranged on the top of the inner wall of the 3D printer housing (1); Connecting blocks (802) are arranged on both sides of the inner wall of the 3D printer housing (1); two connecting blocks (802) are fixedly connected to iron blocks (803) on one side facing the 3D printer housing (1); and the two electromagnets (801) are respectively magnetically connected to the two iron blocks (803); two electric telescopic rods (804) are arranged inside the 3D printer housing (1); the tops of the two electric telescopic rods (804) are respectively fixedly connected to the two connecting blocks (802); and the bottoms of the two electric telescopic rods (804) are fixedly connected to the supporting block (2).

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