3D printing piece grinding and polishing device

Abstract

The utility model relates to the technical field of grinding and polishing, in particular to a grinding and polishing device for a 3d printed part, which comprises a box body supported at the bottom and a rotating disc rotating on the box body, and abrasive paper is adhered to the rotating disc, and is characterized in that a dust box is detachably mounted in the box body, a groove is formed in the rotating disc along the radius of the rotating disc, and the dust box is detachably mounted in the groove. Bristles are arranged in the groove in the radius direction of the rotary disc and protrude out of the upper end face of the abrasive paper. An air hole is formed in the groove and is communicated with the dust box through a channel system. The groove is formed in the rotating disc, the bristles are arranged in the groove, the bottoms of polished parts are cleaned through the bristles, air holes formed in the groove and used for air flow to flow are matched, dust enters the dust box through the channel system along with the air flow, and separation operation between the dust and the air flow is conducted through a filter screen in the dust box; and the cleanliness of the operation space is improved, and the device is suitable for small machining scenes.

Description

Technical Field

[0001] This application relates to the technical field of grinding and polishing, and in particular to a grinding and polishing apparatus for 3D printed parts. Background Technology

[0002] With the continuous advancement of modern manufacturing technology, 3D printing, as an emerging additive manufacturing technology, has been widely applied in numerous fields. However, 3D printed parts often suffer from problems such as high surface roughness and obvious layer textures, which significantly affect the appearance quality, dimensional accuracy, and mechanical properties of the printed parts, thus limiting their direct application in fields with high surface quality requirements. Therefore, post-printing polishing is necessary.

[0003] The most basic current method is manual polishing, which is inefficient. More efficient methods use power tools such as grinding wheels, belt sanders, and polishing wheels, but these methods typically involve large volumes of material and generate significant dust. The devices themselves have poor dust absorption capabilities, requiring external dust collection or blowing equipment to remove the debris, which deteriorates the working environment. Therefore, to address these issues, this application provides a 3D printed part polishing device. Utility Model Content

[0004] To address the problem that existing grinding equipment has a weak ability to handle dust generated during grinding, this application provides a grinding and polishing device for 3D printed parts.

[0005] This application provides a 3D printed part grinding and polishing device, including a box body supported at the bottom and a rotating turntable on the box body. Sandpaper is adhered to the turntable. A dust box is detachably installed inside the box body. The turntable has a groove set along its radius. Brush bristles are arranged in the groove along the radial direction of the turntable. The brush bristles are set to protrude from the upper end surface of the sandpaper.

[0006] The groove has air holes, which are connected to the dust box through a channel system.

[0007] By creating grooves on the turntable and installing brush bristles in the grooves to brush away the dust adhering to the bottom of the workpiece after grinding, the dust enters the channel system through air holes and is eventually transported to the dust box for storage, thus reducing the dispersion of dust during the grinding process.

[0008] Preferably, the channel system includes an air collection groove welded to the bottom of the turntable, with a through hole at the bottom of the air collection groove located at the center of the box body, and an airflow channel communicating with the dust box is provided inside the box body, with the airflow channel and the through hole being rotated and sealed by a sealing ring.

[0009] Preferably, the dust box is slidably embedded inside the box body, and a filter screen is snapped onto the front end of the dust box, and a connection hole communicating with the airflow channel is provided on the side of the dust box.

[0010] Preferably, a second mounting groove is provided at the front end of the dust box in the box body, and an air pump is fixedly connected inside the second mounting groove with bolts. The output end of the air pump is connected to the end of the filter screen of the dust box through a connecting channel.

[0011] Preferably, the box body also has a mounting slot, which contains a circuit board, a power supply and a motor, and the opening side of the mounting slot is closed by a cover plate.

[0012] Preferably, a gear ring is welded to the bottom of the turntable, and a gear is fitted onto the output end of the motor, with the gear and the gear ring meshing and transmitting power.

[0013] Preferably, a number of limiting blocks are welded to the top of the box in a ring array, and a limiting groove is opened on the outer side of the toothed ring, in which the limiting blocks are slidably embedded.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] By creating grooves on the turntable and installing brush bristles inside the grooves, the bottom of the polished parts is cleaned using the brush bristles. Combined with air holes in the grooves for airflow, dust is carried by the airflow through the channel system into the dust box, where it is separated from the airflow by a filter. Compared to existing polishing and grinding methods that do not treat dust, this method improves the cleanliness of the operating space and is suitable for small-scale processing scenarios. Attached Figure Description

[0016] Figure 1 It is the isometric drawing in Embodiment 1 of this application;

[0017] Figure 2 This is the bottom-view isometric drawing from Embodiment 1 of this application;

[0018] Figure 3 This is a structural diagram of the control system in Embodiment 1 of this application;

[0019] Figure 4 This is a partial cross-sectional view of Embodiment 1 of this application;

[0020] Figure 5 This is a diagram of the bottom structure of the turntable in Embodiment 1 of this application;

[0021] Figure 6 This is an exploded view of Embodiment 1 of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Box body; 111. Grille groove; 112. Cover plate; 113. Installation groove one; 114. Installation groove two; 115. Airflow channel; 2. Turntable; 21. Limiting groove; 22. Toothed ring; 221. Groove; 3. Sandpaper; 4. Brush bristles; 5. Air hole; 6. Dust box; 61. Connecting hole; 62. Filter screen; 7. Limiting block; 8. Motor; 9. Gear; 10. Power supply; 11. Circuit board; 12. Air pump; 13. Connecting channel; 14. Air collection groove; 141. Through hole; 15. Sealing ring. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Figure 6 This application will be described in further detail.

[0024] Example 1:

[0025] A 3D printed part grinding and polishing device, as shown in the reference Figure 1 - Figure 6 The box 1 is supported at the bottom, and the turntable 2 rotates on the box 1. Sandpaper 3 is glued to the turntable 2. The back of the sandpaper 3 is made of velvet, and the turntable 2 is made of needle. The sandpaper 3 is glued by magic adhesive. The sandpaper 3 is gradually replaced with sandpaper with a larger grit as needed to ensure the sanding and polishing effect. The shape of the sandpaper 3 is customized according to the style of the turntable 2 to ensure that it does not cover the position of the groove 221.

[0026] The housing 1 also has a mounting slot 113 inside, which houses a circuit board 11, a power supply 10, and a motor 8. The opening of the mounting slot 113 is closed by a cover plate 112. The power supply 10 module makes the device somewhat portable. The circuit board 11 is used to integrate other modules such as a controller to ensure the normal operation of the device. The controller on the circuit board 11 is used to control the start and stop of the motor 8 and the air pump 12. An external switch control module is provided to send commands to the controller. The device can be powered by the power supply 10 or by an external power supply 10, making it more versatile.

[0027] A gear ring 22 is welded to the bottom of the turntable 2, and a gear 9 is fitted on the output end of the motor 8. The gear 9 and the gear ring 22 mesh and drive each other. When the motor 8 rotates, the gear ring 22 rotates, which in turn causes the sandpaper 3 attached to it to rotate, thereby grinding and polishing the 3D printed parts and removing the unevenness generated during the printing process.

[0028] The top of the box 1 is welded with a ring array of several limiting blocks 7. The outer side of the toothed ring 22 is provided with a limiting groove 21. The limiting blocks 7 are slidably embedded in the limiting groove 21. The limiting blocks 7 can support the turntable 2 on the one hand, and limit its axial direction on the other hand, so as to ensure its positional stability during rotation. The front view of the limiting blocks 7 is L-shaped. The groove 221 is located at the center line of the outer wall of the toothed ring 22. The horizontal section of the limiting blocks 7 is slidably embedded in the groove 221 of the toothed ring 22, and the vertical section is welded to the box 1.

[0029] The dust box 6 is detachably installed inside the box body 1. The dust box 6 is slidably embedded inside the box body 1, and a filter 62 is snapped into the front end of the dust box 6. A connection hole 61 communicating with the airflow channel 115 is provided on the side of the dust box 6.

[0030] The turntable 2 has a groove 221 set along its radius. Brush bristles 4 are arranged in the groove 221 along the radial direction of the turntable 2. The brush bristles 4 protrude from the upper surface of the sandpaper 3 by 1 or 2 mm, which ensures contact between the brush bristles 4 and the workpiece being polished, but does not go too far into the space between the workpiece and the sandpaper 3, thus affecting the polishing process. Multiple sets of brush bristles 4 are arranged on both sides of the air hole 5.

[0031] An air hole 5 is provided in the groove 221, and the air hole 5 is connected to the dust box 6 through the channel system. The channel system includes an air collection groove 14 welded to the bottom of the turntable 2. The bottom of the air collection groove 14 is provided with a through hole 141 at the center of the box body 1. An airflow channel 115 communicating with the dust box 6 is provided inside the box body 1. The airflow channel 115 and the through hole 141 are rotated and sealed by a sealing ring 15. The shape of the air collection groove 14 is set according to the position of the air hole 5, and all the air holes 5 are covered. The air collection groove 14 and the upper end face of the box body 1 are fitted with a gap. The sealing ring 15 is rotated to connect the gap, while ensuring airtightness, so that the dust can flow along the channel. The airflow channel 115 is connected between the box body 1 and the dust box 6 to ensure that the dust is sent into the dust box 6.

[0032] The front end of the dust box 6 in the box body 1 is provided with a second mounting groove 114. An air pump 12 is fixedly connected to the inside of the mounting groove 114 by bolts. The output end of the air pump 12 is connected to the end of the filter screen 62 of the dust box 6 through the connecting channel 13. The bottom of the box body 1 is also provided with a grid groove 111 that is connected to the output end of the air pump 12.

[0033] The working principle of the dust collection system is as follows: During the rotation of the turntable 2, the air pump 12 is turned on simultaneously. When the dust passes through the brush bristles 4, it is swept off by the brush bristles 4. Since there is airflow through the air hole 5, the airflow will carry the dust in the groove 221 into the air collection groove 14. Then, it passes through the sealing ring 15, the airflow channel 115 and the connecting hole 61 into the dust box 6. Under the action of the air pump 12, the airflow entering the dust box 6 moves towards the filter screen 62. Finally, the dust is intercepted by the filter screen 62, and the airflow that has removed the dust passes through the pump body of the air pump 12 and is output to the outside of the box body 1 through the grid groove 111. The dust is collected in the dust box 6. After a period of use, the dust box 6 can be pulled out from the box body 1. After opening the filter screen 62 module at the end, the dust inside can be poured out for cleaning.

[0034] The foregoing description, with reference to preferred embodiments, illustrates an exemplary implementation of a 3D printed part grinding and polishing apparatus provided by this disclosure. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, the protection scope of which is determined by the appended claims.

Claims

1. A 3D printed part grinding and polishing device, comprising a box body (1) supported at the bottom and a rotating turntable (2) on the box body (1), wherein sandpaper (3) is adhered to the turntable (2), characterized in that: The box body (1) is detachably installed with a dust box (6). The turntable (2) has a groove (221) arranged along its radius. Brush bristles (4) are arranged in the groove (221) along the radius of the turntable (2). The brush bristles (4) protrude from the upper surface of the sandpaper (3). The groove (221) is provided with an air hole (5), which is connected to the dust box (6) through a channel system.

2. The grinding and polishing apparatus according to claim 1, characterized in that: The channel system includes an air collection groove (14) welded to the bottom of the turntable (2). The bottom of the air collection groove (14) is provided with a through hole (141) at the center of the box body (1). An airflow channel (115) communicating with the dust box (6) is provided inside the box body (1). The airflow channel (115) and the through hole (141) are rotated and sealed by a sealing ring (15).

3. The grinding and polishing apparatus according to claim 2, characterized in that: The dust box (6) is slidably embedded inside the box body (1), and a filter screen (62) is snapped onto the front end of the dust box (6). A connection hole (61) communicating with the airflow channel (115) is provided on the side of the dust box (6).

4. The grinding and polishing apparatus according to claim 3, characterized in that: The front end of the dust box (6) in the box body (1) is provided with a second mounting groove (114). An air pump (12) is fixedly connected inside the second mounting groove (114) by bolts. The output end of the air pump (12) is connected to the end of the filter screen (62) of the dust box (6) through the connecting channel (13).

5. The grinding and polishing apparatus according to claim 1, characterized in that: The box body (1) is also provided with a mounting slot (113), which contains a circuit board (11), a power supply (10) and a motor (8). The opening side of the mounting slot (113) is closed by a cover plate (112).

6. The grinding and polishing apparatus according to claim 5, characterized in that: A gear ring (22) is welded to the bottom of the turntable (2), and a gear (9) is fitted onto the output end of the motor (8). The gear (9) and the gear ring (22) mesh and transmit power.

7. The grinding and polishing apparatus according to claim 6, characterized in that: The top of the box (1) is welded with a number of limiting blocks (7) in an annular array. The outer side of the toothed ring (22) is provided with a limiting groove (21), and the limiting blocks (7) are slidably embedded in the limiting groove (21).

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