Laser leveling feedback type 3D printer

Abstract

The utility model discloses a laser leveling feedback type 3D printer which comprises a printer body frame, the interior of the printer body frame is fixedly connected with aluminum plates, the two aluminum plates are vertically connected, the top of the printer body frame is fixedly connected with an X-axis guide rail and a Y-axis guide rail, the two sides of the printer body frame are fixedly connected with Z-axis guide rails, and the X-axis guide rail and the Y-axis guide rail are fixedly connected with Z-axis guide rails. The automatic leveling device has the beneficial effects that through the laser ranging module and the depth camera, not only can the printing platform of the printer be automatically leveled, but also the model quality in the printing process can be fed back in real time, and the yield of the printed model is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of additive manufacturing, and in particular to a laser leveling feedback type 3D printer. Background Art

[0002] In recent years, 3D printing technology has made significant progress and is widely used in manufacturing, healthcare, aerospace and other fields. However, with the continuous development of 3D printing technology, some new challenges and problems have gradually emerged. Among them, the automatic leveling of the 3D printing platform and the inability to provide feedback on the quality of printed parts during the printing process are difficult to solve pain points. Traditional 3D printers usually require manual adjustment of the height and level of the printing platform. Screws or nuts are usually used to adjust the height of the platform, or the inclination angle of the platform is manually adjusted. However, this method may be time-consuming and labor-intensive, and is not accurate enough, which can easily lead to unstable printing quality. In addition, traditional 3D printers cannot provide users with real-time feedback on the quality of the printed object during the printing process, which not only reduces the yield rate of printed parts but also causes material waste. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a laser leveling feedback type 3D printer, and the utility model is realized through the following technical solutions.

[0004] A laser leveling feedback 3D printer comprises a body frame, wherein an aluminum plate is fixedly connected inside the body frame, and the aluminum plates are two vertically connected, an X-axis guide rail and a Y-axis guide rail are fixedly connected to the top of the body frame, and Z-axis guide rails are fixedly connected to both sides of the body frame, and a printing platform is movably connected to the two Z-axis guide rails, a Z-axis motor is fixedly connected to the bottom aluminum plate, a coupling is fixedly connected to the output end of the Z-axis motor, and a Z-axis lead screw is fixedly connected to one end of the coupling, the Z-axis lead screw passes through one end of the printing platform and is rotatably connected to the aluminum plate through a bearing, and the printing platform and the Z-axis lead screw are threadedly matched, and the printer also comprises an extrusion module, a transmission device, a feeding device, a depth camera and a laser ranging module.

[0005] Furthermore, the extrusion module also includes a printing nozzle, a cooling fan, and a nozzle heating module.

[0006] Furthermore, the transmission device also includes a stepper motor, a transmission wheel and a transmission belt. The stepper motor can drive the print head to move along the X and Y axes through the transmission belt and the transmission wheel.

[0007] Furthermore, the feeding device is arranged on the rear side of the fuselage frame.

[0008] Furthermore, the depth camera is fixedly connected to the front end of the top of the fuselage frame through a set bracket.

[0009] Furthermore, the laser ranging module is located directly below the extrusion module.

[0010] Furthermore, the fuselage frame is an aluminum profile, and the thickness of the aluminum plate is 6 mm.

[0011] The beneficial effect of the utility model is that compared with the prior art, the laser leveling feedback 3D printer designed by the utility model can not only realize the automatic leveling of the printer printing platform through the laser ranging module and the depth camera, but also can provide real-time feedback on the model quality during the printing process, thereby improving the yield rate of the printed model. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 : A schematic diagram of the structure of a laser leveling feedback 3D printer described in the utility model;

[0014] Figure 2 : A side view of the utility model.

[0015] The reference numerals are as follows:

[0016] 1. Body frame; 2. Aluminum plate; 3. Printing platform; 4. Bearing; 5. X-axis guide rail; 6. Y-axis guide rail; 7. Z-axis guide rail; 8. Z-axis screw rod; 9. Coupling; 10. Extrusion module; 11. Transmission device; 12. Feeding device; 13. Depth camera; 14. Laser ranging module. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-2 As shown, the utility model has the following specific embodiments.

[0019] Example:

[0020] A laser leveling feedback 3D printer comprises a body frame 1, an aluminum plate 2 is fixedly connected inside the body frame 1, and the aluminum plates 2 are two vertically connected, an X-axis guide rail 5 and a Y-axis guide rail 6 are fixedly connected to the top of the body frame 1, and Z-axis guide rails 7 are fixedly connected to both sides of the body frame 1, and a printing platform 3 is movably connected to the two Z-axis guide rails 7, a Z-axis motor is fixedly connected to the bottom aluminum plate 2, a coupling 9 is fixedly connected to the output end of the Z-axis motor, and a Z-axis screw rod 8 is fixedly connected to one end of the coupling 9, and the Z-axis screw rod 8 passes through one end of the printing platform 3 and is rotatably connected to the aluminum plate 2 through a bearing 4, and the printing platform 3 is threadedly matched with the Z-axis screw rod 8. The printer also comprises an extrusion module 10, a transmission device 11, a feeding device 12, a depth camera 13 and a laser ranging module 14.

[0021] Specifically, the extrusion module 10 also includes a printing nozzle, a cooling fan, and a nozzle heating module.

[0022] By adopting the above technical solution, the nozzle is heated by the heating module, and then the nozzle melts the solid consumables into liquid, and the parts are printed by stacking layer by layer. During the printing process, the cooling fan cools the extruded liquid consumables through the air duct to ensure the molding quality of the printed parts.

[0023] Specifically, the transmission device 11 also includes a stepper motor, a transmission wheel and a transmission belt. The stepper motor can drive the print head to move along the X and Y axes through the transmission belt and the transmission wheel.

[0024] By adopting the above technical solution, the movement of the stepper motor is controlled, and the printing nozzle is driven to move on the X and Y axes through the transmission belt and the transmission wheel.

[0025] Specifically, the feeding device 12 is arranged on the rear side of the fuselage frame 1 .

[0026] Specifically, the depth camera 13 is fixed to the front end of the top of the fuselage frame 1 through a provided bracket.

[0027] The laser distance measurement module 14 is located directly below the extrusion module 10 .

[0028] By adopting the above technical solution, it can be kept parallel to the nozzle. In the startup phase of the printer, the printing platform is evenly divided into 5*5 grids, and the layer mesh bed data is generated by measuring the distance between the nozzle and 36 points in the grid. During the printing process, according to the mesh bed data generated by the laser ranging module 14, the relative distance between the nozzle and the printing platform is adjusted in real time through the up and down movement of the Z axis to ensure that the printing nozzle always maintains the same distance with the hot bed, thereby realizing automatic leveling of the printing platform.

[0029] Specifically, the fuselage frame 1 is an aluminum profile, and the thickness of the aluminum plate 2 is 6 mm.

[0030] The specific working principle of this utility model:

[0031] During the printing process, the transmission device 11 is driven by a stepper motor to realize the movement of the print head on the XY axis. The Z-axis stepper motor is connected to the Z-axis screw 8 through a coupling 9 to realize the up and down movement of the printing platform in the Z-axis direction. The depth camera 13 is connected to the computer to monitor the printing platform. The depth camera 13 transmits real-time point cloud data to the computer. The object being printed is reconstructed in three dimensions through the MVS dense point cloud reconstruction technology and the similarity between the three-dimensional reconstruction model based on MVS and the three-dimensional model of the printed object is calculated. The similarity is characterized by the Euclidean distance between a certain number of points in the same area on the two models. If the similarity is lower than the set threshold, it indicates that the deviation between the printed object and the original three-dimensional model is large, and the printing accuracy of the 3D printer is poor. At this time, the computer gives a real-time alarm to provide feedback on the printing quality.

[0032] For further explanation of this embodiment,

[0033] The computer starts the printing operation by slicing the model of the desired printed part and transmitting it to the 3D printer wirelessly. The printing platform 3 and the extrusion module 10 start to heat up to a preset temperature;

[0034] After preheating, the printer starts to perform automatic leveling operation, evenly distributes the printing platform into a 5*5 grid, and the laser ranging module 14 collects 36 points in the grid, and generates the mesh bed data by measuring the distance between the 36 points and the extruder head;

[0035] During the printing process, according to the generated mesh bed data, the Z-axis stepper motor is controlled by the control module 15 to adjust the relative distance between the printing platform and the printing nozzle in real time, so that the distance is kept at 0.15mm;

[0036] After printing starts, the depth camera 13 starts working, collects point cloud data of the printed model every 5 minutes and uploads the collected point cloud data to the computer. The computer uses the MVS dense point cloud reconstruction technology to perform three-dimensional reconstruction of the printed object and calculates the similarity between the three-dimensional reconstruction model based on MVS and the three-dimensional model of the printed object;

[0037] When the similarity is lower than a set threshold, the computer transmits a command to the 3D printer to pause printing and prompts the user.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A laser leveling feedback 3D printer, comprising a body frame (1), characterized in that: The interior of the fuselage frame (1) is fixedly connected with an aluminum plate (2), and the aluminum plates (2) are two vertically connected. The top of the fuselage frame (1) is fixedly connected with an X-axis guide rail (5) and a Y-axis guide rail (6). Both sides of the fuselage frame (1) are fixedly connected with Z-axis guide rails (7). The two Z-axis guide rails (7) are commonly and movably connected with a printing platform (3). The bottom aluminum plate (2) is fixedly connected with a Z-axis motor. The output end of the Z-axis motor is fixedly connected with a coupling (9). One end of the coupling (9) is fixedly connected with a Z-axis screw rod (8). One end of the Z-axis screw rod (8) passes through the printing platform (3) and is rotatably connected to the aluminum plate (2) through a bearing (4). The printing platform (3) and the Z-axis screw rod (8) are threadedly matched. The invention also includes an extrusion module (10), a transmission device (11), a feeding device (12), a depth camera (13) and a laser ranging module (14).

2. A laser leveling feedback 3D printer according to claim 1, characterized in that: The extrusion module (10) also includes a printing nozzle, a cooling fan, and a nozzle heating module.

3. The laser leveling feedback 3D printer according to claim 1, characterized in that: The transmission device (11) also includes a stepping motor, a transmission wheel and a transmission belt. The stepping motor can drive the printing head to move along the X and Y axes through the transmission belt and the transmission wheel.

4. The laser leveling feedback 3D printer according to claim 1, characterized in that: The feeding device (12) is arranged on the rear side of the fuselage frame (1).

5. The laser leveling feedback 3D printer according to claim 1, characterized in that: The depth camera (13) is fixedly connected to the front end of the top of the fuselage frame (1) via a provided bracket.

6. The laser leveling feedback 3D printer according to claim 1, characterized in that: The laser distance measuring module (14) is located directly below the extrusion module (10).

7. The laser leveling feedback 3D printer according to claim 1, characterized in that: The fuselage frame (1) is an aluminum profile, and the thickness of the aluminum plate (2) is 6 mm.

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