Rotary powder cleaning table and additive manufacturing equipment

Abstract

The utility model belongs to the technical field of additive manufacturing, and particularly relates to a rotary powder cleaning table and additive manufacturing equipment. The rotary powder cleaning table comprises an overturning rocker arm, a rotary driving mechanism, an overturning driving mechanism, a mounting plate, a transmission mechanism and a bearing seat, the number of the bearing pedestals is two, the two bearing pedestals are arranged in parallel in a spaced mode, the overturning rocker arm is located between the two bearing pedestals, and the two ends of the overturning rocker arm are rotationally connected with the two bearing pedestals correspondingly. The turnover driving mechanism and the rotary driving mechanism are respectively mounted on the two bearing seats, and one end of the turnover rocker arm is connected with the turnover driving mechanism; the rotary driving mechanism is connected with the mounting plate through the transmission mechanism; the mounting plate is located between the two bearing seats and located above the overturning rocker arm, and the mounting plate is rotationally mounted on the overturning rocker arm. The rotary powder cleaning table has the functions of overturning and rotating, a workpiece can be suspended at any angle, powder can be quickly cleaned, no electric device is arranged in the powder cleaning cavity when the powder of the workpiece is cleaned, and the explosion risk is greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of additive manufacturing technology, specifically relating to a rotary powder cleaning table and additive manufacturing equipment. Background Technology

[0002] Additive manufacturing (AM) is an advanced manufacturing technology characterized by digital manufacturing, high flexibility and adaptability, direct CAD model-driven operation, speed, and a wide variety of materials. Since its development in the late 1980s, it has become a pillar technology in modern advanced manufacturing. Selective laser sintering (SLS) is one of the fastest-growing additive manufacturing technologies in recent years.

[0003] Existing additive manufacturing equipment (taking selective laser sintering equipment as an example) has the following basic process for selective laser sintering: a powder feeding device delivers a certain amount of powder to the worktable, a powder spreading mechanism spreads a layer of powder material evenly on the upper surface of the already formed part on the worktable, and a galvanometer system controls the laser to scan the solid powder layer according to the cross-sectional contour of the layer, so that the powder melts and fuses with the already formed part below; after one cross-section is sintered, the worktable descends by the thickness of one layer, and the powder spreading mechanism spreads another layer of uniform and dense powder on top, and scans and sinters the new cross-section. After several layers of scanning are superimposed, the entire prototype manufacturing is completed.

[0004] Existing selective laser sintering (SLS) equipment generally employs two methods for cleaning workpieces after sintering: automatic cleaning by the main unit and separate cleaning by removing the cylinder. Most medium-to-large-sized SLS equipment currently uses automatic cleaning by the main unit. This method eliminates the need for manual cylinder transfer, but its drawbacks include low cleaning efficiency and the inability to quickly perform secondary printing, significantly impacting production efficiency. To address these issues, an adjustable-arm-length tilting cleaning table and additive manufacturing equipment were developed (patent publication number CN222429275U). However, because this tilting cleaning table places the rotary drive mechanism below the rotating plate, when the tilting cleaning table is installed on the cleaning cavity, the rotary drive mechanism is located inside the cleaning cavity. This causes powder to enter the electrical components of the rotary drive mechanism during workpiece cleaning, potentially leading to short circuits and explosion risks, resulting in a low safety factor. Utility Model Content

[0005] This utility model provides a rotary powder cleaning table to solve the problems of low powder cleaning efficiency and inability to quickly perform secondary printing caused by existing powder cleaning methods, which greatly affect production efficiency. At the same time, there are no electrical components in the powder cleaning cavity during workpiece powder cleaning, which greatly reduces the risk of explosion and has a high safety factor.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] A rotating powder cleaning table includes a tilting rocker arm, a rotation drive mechanism, a tilting drive mechanism, a mounting plate, a transmission mechanism, and a bearing seat; the number of bearing seats is two, and the two bearing seats are arranged in parallel and alternately, the tilting rocker arm is located between the two bearing seats, and the two ends of the tilting rocker arm are respectively rotatably connected to the two bearing seats;

[0008] The flipping drive mechanism and the rotating drive mechanism are respectively mounted on the two bearing seats, and one end of the flipping rocker arm is connected to the flipping drive mechanism; the rotating drive mechanism is connected to the mounting plate through the transmission mechanism; the mounting plate is located between the two bearing seats and above the flipping rocker arm, and the mounting plate is rotatably mounted on the flipping rocker arm.

[0009] Furthermore, the flipping drive mechanism includes a flipping motor, a flipping reducer, a first flipping shaft, and a second flipping shaft; both ends of the flipping rocker arm are respectively connected to the first flipping shaft and the second flipping shaft, and the first flipping shaft and the second flipping shaft are respectively rotatably mounted on the two bearing seats; the flipping motor and the flipping reducer are mounted on the first bearing seat, and the flipping motor is connected to the first flipping shaft through the flipping reducer.

[0010] Furthermore, the rotary drive mechanism includes a rotary motor, a rotary reducer, and a transmission shaft; the transmission mechanism includes a bevel gear and a bevel gear ring arranged along the outer contour of the mounting plate; the rotary motor and the rotary reducer are mounted on the second bearing seat, and the rotary motor is connected to the transmission shaft through the rotary reducer;

[0011] The second flip shaft has a hollow structure, the transmission shaft passes through the second flip shaft, and the second flip shaft is rotatably mounted to the transmission shaft through the first rotary bearing. The transmission shaft is connected to the bevel gear, and the bevel gear meshes with the bevel gear ring.

[0012] Furthermore, the first tilting shaft is rotatably mounted on the first bearing housing via a second rotary bearing.

[0013] Furthermore, the rotating powder cleaning table also includes multiple air hammers, which are mounted on the mounting plate and are evenly distributed in a circular pattern.

[0014] Preferably, the tilting rocker arm has an inverted U-shaped structure.

[0015] Furthermore, a rotating spindle is connected to the lower center of the mounting plate, and the rotating spindle is rotatably connected to the tilting rocker arm.

[0016] An additive manufacturing apparatus includes a powder cleaning chamber, a frame, a substrate, and a rotating powder cleaning table. The substrate is used to support the printed workpiece. The powder cleaning chamber is mounted above the frame. Two bearing seats are distributed on opposite outer sides of the powder cleaning chamber and are connected to the frame. A mounting plate, a tilting rocker arm, and a transmission mechanism are located inside the powder cleaning chamber. During workpiece powder cleaning, the substrate is fixedly mounted on the mounting plate.

[0017] Furthermore, the lower part of the powder-cleaning cavity has an inverted conical structure, and a powder outlet is provided at the tip of the inverted conical structure.

[0018] The beneficial effects of this utility model are as follows: After the additive manufacturing equipment completes workpiece printing, the existing rotating mechanism directly transfers the workpiece along with the substrate to the rotating powder cleaning table. Simultaneously, another set of spare substrates is transferred to the additive manufacturing equipment for secondary printing. The powder cleaning operation and printing are performed simultaneously, greatly improving production efficiency and providing a strong guarantee for the reliability of continuous printing. During workpiece powder cleaning, the substrate is mounted on the mounting plate of the rotating powder cleaning table. The rotating and flipping drive mechanisms respectively realize the flipping and rotation of the rotating powder cleaning table, thereby achieving workpiece suspension at any angle. This allows for rapid powder cleaning, reducing waiting time, and ensuring thorough powder removal. It also reduces the need for subsequent cleaning of residual powder inside the workpiece, minimizing powder waste and enabling unmanned powder cleaning operation. Furthermore, it is suitable for cleaning complex workpieces. Meanwhile, the rotary drive mechanism and the flipping drive mechanism are respectively mounted on two bearing seats, that is, the rotary drive mechanism and the flipping drive mechanism are located on both sides of the mounting plate. Thus, when the rotary powder cleaning table is installed on the powder cleaning cavity, both the rotary drive mechanism and the flipping drive mechanism can be located on the outside of the powder cleaning cavity. This ensures that there are no electrical components in the powder cleaning cavity during workpiece powder cleaning, greatly reducing the risk of explosion and ensuring a high safety factor. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the rotating powder cleaning table of this utility model;

[0021] Figure 2 for Figure 1 The main view;

[0022] Figure 3 for Figure 2 A sectional view of the left side;

[0023] Figure 4 This is a perspective view of the assembly of the rotary powder cleaning table, powder cleaning cavity, frame, base plate, workpiece and powder receiving trolley of this utility model.

[0024] The above figure labels:

[0025] 1. Tilting rocker arm; 2. Tilting drive mechanism; 21. Tilting motor; 22. Tilting reducer; 23. Second tilting shaft; 24. First tilting shaft; 3. Rotation drive mechanism; 31. Rotation motor; 32. Rotation reducer; 33. Transmission shaft; 4. Bearing housing; 5. Mounting plate; 6. Bevel gear; 7. Air hammer; 8. Rotation spindle; 9. Bearing mounting seat; 10. First rotary bearing; 11. Base plate; 12. Frame; 121. Inverted conical structure; 13. Powder cleaning chamber; 14. Powder receiving trolley; 15. Workpiece. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0027] like Figures 1-4 As shown, this embodiment provides a rotating powder cleaning table, including a flipping rocker arm 1, a rotating drive mechanism 3, a flipping drive mechanism 2, a mounting plate 5, a transmission mechanism, and a bearing seat 4; there are two bearing seats 4, which are arranged in parallel and alternately, and the flipping rocker arm 1 is located between the two bearing seats 4, and both ends of the flipping rocker arm 1 are rotatably connected to the two bearing seats 4 respectively.

[0028] The flipping drive mechanism 2 and the rotating drive mechanism 3 are respectively mounted on the two bearing seats 4, and one end of the flipping rocker arm 1 is connected to the flipping drive mechanism 2; the rotating drive mechanism 3 is connected to the mounting plate 5 through the transmission mechanism; the mounting plate 5 is located between the two bearing seats 4 and above the flipping rocker arm 1, and the mounting plate 5 is rotatably mounted on the flipping rocker arm 1.

[0029] After the additive manufacturing equipment completes the printing of workpiece 15, the existing transfer mechanism directly transfers workpiece 15 along with substrate 11 to the flipping and cleaning table. At the same time, another set of spare substrate 11 is transferred to the additive manufacturing equipment for secondary printing. The cleaning operation and printing are carried out simultaneously, which greatly improves production efficiency and provides a strong guarantee for the reliability of continuous printing.

[0030] When cleaning the workpiece 15, the base plate 11 is mounted on the mounting plate 5 of the rotating powder cleaning table. The rotating powder cleaning table is flipped and rotated by the flipping drive mechanism 2 and the rotating drive mechanism 3, respectively, thus enabling the workpiece 15 to hover at any angle. This allows for rapid powder cleaning, reduces waiting time, and ensures thorough powder removal, shortening the subsequent process of cleaning residual powder inside the workpiece 15, reducing powder waste, and achieving unmanned powder cleaning operation. It is also suitable for cleaning complex workpieces 15. The rotating drive mechanism 3 and the flipping drive mechanism 2 are mounted on two bearing seats 4, respectively, located on opposite sides of the mounting plate 5. Therefore, when the rotating powder cleaning table is mounted on the powder cleaning cavity 13, both the rotating drive mechanism 3 and the flipping drive mechanism 2 are located outside the powder cleaning cavity 13. This ensures that there are no electrical components inside the powder cleaning cavity 13 during workpiece 15 powder cleaning, greatly reducing the risk of explosion and ensuring a high safety factor.

[0031] In this preferred embodiment, the flipping drive mechanism 2 includes a flipping motor 21, a flipping reducer 22, a first flipping shaft 24, and a second flipping shaft 23; both ends of the flipping rocker arm 1 are respectively connected to the first flipping shaft 24 and the second flipping shaft 23, and the first flipping shaft 24 and the second flipping shaft 23 are respectively rotatably mounted on the two bearing seats 4; the flipping motor 21 and the flipping reducer 22 are mounted on the first bearing seat 4, and the flipping motor 21 is connected to the first flipping shaft 24 through the flipping reducer 22.

[0032] When the flipping drive mechanism 2 is working, the flipping motor 21 starts and drives the first flipping shaft 24 to rotate via the flipping reducer 22. The two ends of the flipping rocker arm 1 are rotatably mounted on two bearing seats 4 via the first flipping shaft 24 and the second flipping shaft 23, respectively. Therefore, the rotation of the first flipping shaft 24 will drive the flipping rocker arm 1 to rotate on the two bearing seats 4, thereby driving the flipping rocker arm 1, the mounting plate 5, the base plate 11 and the workpiece 15 to flip synchronously.

[0033] In this preferred embodiment, the rotary drive mechanism 3 includes a rotary motor 31, a rotary reducer 32, and a transmission shaft 33; the transmission mechanism includes a bevel gear 6 and a bevel gear ring (not shown in the figure) arranged along the outer contour of the mounting plate 5; the rotary motor 31 and the rotary reducer 32 are mounted on the second bearing seat 4, and the rotary motor 31 is connected to the transmission shaft 33 through the rotary reducer 32; the second tilting shaft 23 has a hollow structure, the transmission shaft 33 passes through the second tilting shaft 23, and the second tilting shaft 23 is rotatably mounted to the transmission shaft 33 through the first rotary bearing 10; the transmission shaft 33 is connected to the bevel gear 6, and the bevel gear 6 meshes with the bevel gear ring.

[0034] When the rotary drive mechanism 3 is working, the rotary motor 31 drives the transmission shaft 33 to rotate via the rotary reducer 32. The rotation of the transmission shaft 33 drives the bevel gear 6 connected to it to rotate. The bevel gear 6 meshes with the bevel gear ring, so the rotation of the bevel gear 6 will drive the mounting plate 5 to rotate, thereby driving the base plate 11 and the workpiece 15 on the mounting plate 5 to rotate synchronously.

[0035] In this embodiment, the second flip shaft 23 adopts a hollow structure design. The first rotary bearing 10 is located inside the first flip shaft 24. The first rotary bearing 10 serves as the rotation support for the transmission shaft 33, ensuring the rotation of the transmission shaft 33, and also enabling the rotation of the second flip shaft 23. The structure design is ingenious.

[0036] In this preferred embodiment, the first flip shaft 24 is rotatably mounted on the first bearing seat 4 via a second rotary bearing (not shown in the figure).

[0037] In this preferred embodiment, the rotary powder cleaning table further includes multiple air hammers 7, which are mounted on the mounting plate 5 and are evenly distributed circumferentially. The vibration of the air hammers 7 assists in rapid powder cleaning, ensuring that residual powder is removed from complex workpieces 15 within a short time. This is particularly beneficial for workpieces 15 with complex internal flow channels, ensuring no residual powder remains and reducing powder waste.

[0038] In this preferred embodiment, the flipping rocker arm 1 has an inverted U-shaped structure, and the mounting plate 5 is located inside the inverted U-shaped structure of the flipping rocker arm 1.

[0039] In a preferred embodiment, a rotating spindle 8 is connected to the lower center of the mounting plate 5, and the rotating spindle 8 is rotatably connected to the tilting rocker arm 1. Specifically, the tilting rocker arm 1 is provided with a bearing mounting seat 9, and the rotating spindle 8 is rotatably mounted on the bearing mounting seat 9 via a bearing, so as to realize the rotatable mounting of the mounting plate 5 and the tilting rocker arm 1.

[0040] See Figure 4As shown, an additive manufacturing apparatus includes a powder cleaning chamber 13, a frame 12, a substrate 11, and a rotating powder cleaning table. The substrate 11 supports the printed workpiece 15. The powder cleaning chamber 13 is mounted above the frame 12. Two bearing seats 4 are distributed on opposite outer sides of the powder cleaning chamber 13, and the bearing seats 4 are connected to the frame 12. The mounting plate 5, the tilting rocker arm 1, and the transmission mechanism are located inside the powder cleaning chamber 13. When the workpiece 15 is being powder cleaned, the substrate 11 is fixedly mounted on the mounting plate 5. Of course, additive manufacturing equipment also includes conventional configurations such as a powder spreading mechanism and a galvanometer system, which will not be described in detail here. In this embodiment, when the rotating powder cleaning table is mounted on the powder cleaning chamber 13, the two bearing seats 4 are distributed on opposite outer sides of the powder cleaning chamber 13, that is, the rotating drive mechanism 3 and the tilting drive mechanism 2 are distributed on opposite outer sides of the powder cleaning chamber 13. This ensures that there are no electrical components inside the powder cleaning chamber 13 when the workpiece 15 is being powder cleaned, greatly reducing the risk of explosion and ensuring a high safety factor.

[0041] In this preferred embodiment, the lower part of the powder cleaning cavity 13 has an inverted conical structure 121, and a powder outlet is provided at the tip of the inverted conical structure 121. When cleaning the workpiece 15, the powder receiving carriage 14 is placed in the frame 12, and the powder receiving carriage 14 is connected to the powder outlet.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rotary duster characterized by comprising: Including the turnover rocker arm (1), the rotation drive mechanism (3), the turnover drive mechanism (2), the mounting plate (5), transmission mechanism and bearing seat (4);The number of bearing seat (4) is two, two bearing seat (4) is parallel and is arranged, the turnover rocker arm (1) is located between two bearing seat (4), and the both ends of the turnover rocker arm (1) are rotatably connected with two bearing seat (4) respectively; The turnover drive mechanism (2) and rotation drive mechanism (3) are installed on two bearing seat (4) respectively, and one end of the turnover rocker arm (1) is connected with the turnover drive mechanism (2);The rotation drive mechanism (3) is connected with the mounting plate (5) through the transmission mechanism;The mounting plate (5) is located between two bearing seat (4), and is located above the turnover rocker arm (1), the mounting plate (5) is rotatably installed on the turnover rocker arm (1).

2. The rotary air classifier according to claim 1, wherein, The turnover drive mechanism (2) includes turnover motor (21), turnover speed reducer (22), first turnover shaft (24) and second turnover shaft (23);The both ends of the turnover rocker arm (1) are connected with the first turnover shaft (24) and the second turnover shaft (23) respectively, and the first turnover shaft (24) and the second turnover shaft (23) are rotatably installed on two bearing seat (4) respectively;The turnover motor (21) and turnover speed reducer (22) are installed on the first bearing seat (4), and the turnover motor (21) is connected with the first turnover shaft (24) through the turnover speed reducer (22).

3. The rotary air table of claim 2, wherein, The rotation drive mechanism (3) includes rotation motor (31), rotation speed reducer (32) and transmission shaft (33);The transmission mechanism includes bevel gear (6), bevel gear ring arranged along the outer contour of the mounting plate (5);The rotation motor (31) and rotation speed reducer (32) are installed on the second bearing seat (4), the rotation motor (31) is connected with the transmission shaft (33) through the rotation speed reducer (32); The second turnover shaft (23) is a hollow structure, the transmission shaft (33) passes through the second turnover shaft (23), and the second turnover shaft (23) is rotatably installed with the transmission shaft (33) through the first rotation bearing (10), the transmission shaft (33) is connected with the bevel gear (6), and the bevel gear (6) is engaged with the bevel gear ring.

4. The rotary air table of claim 2 wherein, The first turnover shaft (24) is rotatably installed on the first bearing seat (4) through the second rotation bearing.

5. The rotary air table of claim 1 wherein, The rotary powder cleaning table further comprises a plurality of air hammers (7), and the plurality of air hammers (7) are rotatably installed on the mounting plate (5).

6. The rotary air receiver according to claim 1, wherein, The turnover rocker arm (1) is in inverted M-shaped structure.

7. The rotary air receiver according to claim 1, wherein, The lower middle of the mounting plate (5) is connected with a rotary main shaft (8), and the rotary main shaft (8) is rotatably connected with the turnover rocker arm (1).

8. An additive manufacturing apparatus, characterized by The powder cleaning cavity (13), the frame (12), the base plate (11) and the rotating powder cleaning platform of any one of claims 1-7, wherein the base plate (11) is used for carrying the printed workpiece (15); the powder cleaning cavity (13) is installed above the frame (12); two bearing seats (4) are distributed on opposite sides of the powder cleaning cavity (13), the bearing seat (4) is connected with the frame (12), the mounting plate (5), the turnover rocker arm (1) and the transmission mechanism are located inside the powder cleaning cavity (13); when the workpiece (15) is cleaned, the base plate (11) is fixedly installed on the mounting plate (5).

9. The additive manufacturing apparatus of claim 8, wherein, The lower part of the powder cleaning cavity (13) is in an inverted conical structure (121), and a powder outlet is arranged at the tip of the inverted conical structure (121).

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