Overturning powder cleaning table with adjustable arm length and additive manufacturing equipment

Abstract

The utility model belongs to the technical field of additive manufacturing, and particularly relates to an overturning powder cleaning table with an adjustable arm length and additive manufacturing equipment. The utility model discloses a turnover powder cleaning table with an adjustable arm length. The turnover powder cleaning table comprises a supporting frame, a swing arm, a turnover platform, a rotating plate, a rotating driving mechanism, a turnover driving mechanism and a linear movement driving part, the two swing arms are arranged in parallel at an interval, and the two swing arms are rotationally connected with the supporting frame through the turnover driving mechanism; the linear movement driving piece is connected with the overturning platform; the rotating plate is positioned above the overturning platform and is rotationally mounted on the overturning platform; the rotation driving mechanism is installed on the overturning platform and connected with the rotating plate. The overturning powder cleaning table has double functions of rotating and overturning, can realize hovering of a workpiece at any angle, can ensure that residual powder in the workpiece can be cleaned out in a short time, and provides powerful guarantee for the reliability of continuous printing of equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of additive manufacturing, and in particular relates to a flip powder cleaning table with adjustable arm length and additive manufacturing equipment. Background Art

[0002] Additive Manufacturing (AM) is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Since its development in the late 1980s, it has become a pillar technology in modern advanced manufacturing technology. Selective Laser Sintering (SLS) is one of the fastest-growing additive manufacturing technologies in recent years.

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

[0004] The existing selective laser sintering equipment generally has two ways of cleaning the workpiece powder after sintering: automatic cleaning by the main machine and separate cleaning by disconnecting the cylinder. At present, most medium and large selective laser sintering equipment adopts the automatic cleaning function of the main machine. This form of powder cleaning does not require manual transfer of the cylinder, but the disadvantage is that the powder cleaning efficiency is low and the secondary printing cannot be performed quickly, which greatly affects the production efficiency. Utility Model Content

[0005] The utility model provides a flip powder cleaning table with adjustable arm length, so as to solve the problems of low powder cleaning efficiency and inability to quickly perform secondary printing caused by the existing powder cleaning method, which greatly affects the production efficiency.

[0006] The specific technical solutions adopted by the utility model are as follows:

[0007] A flip powder cleaning table with adjustable arm length, comprising a support frame, a swing arm, a flip platform, a rotating plate, a rotating drive mechanism, a flip drive mechanism and a linear motion drive member; the number of the swing arms is two, the two swing arms are arranged in parallel and alternately, and the two swing arms are rotatably connected to the support frame through the flip drive mechanism;

[0008] Each of the swing arms is provided with the linear motion driving member, the flip platform is located between the two swing arms, and the linear motion driving member is connected to the flip platform, and the linear motion driving member drives the flip platform to perform lifting motion;

[0009] The rotating plate is located above the flip platform and is rotatably mounted on the flip platform; the rotating drive mechanism is located below the rotating plate, the rotating drive mechanism is mounted on the flip platform and is connected to the rotating plate, and the rotating drive mechanism drives the rotating plate to perform a rotating motion.

[0010] Furthermore, the rotary drive mechanism includes a rotary motor and a gear transmission structure, the rotary motor is installed below the flip platform, the gear transmission structure is installed in the middle of the flip platform, and the rotary motor is connected to the rotating plate through the gear transmission structure.

[0011] Furthermore, the flip driving mechanism includes a flip motor, a speed reducer and a flip shaft, the swing arm is rotatably mounted on the support frame via the flip shaft, and the flip motor is connected to one of the flip shafts via the speed reducer.

[0012] Furthermore, a limiting step is provided below the swing arm, and the limiting steps of the two swing arms are arranged opposite to each other, and the limiting step is used for the lower limit of the flip platform.

[0013] Furthermore, the flip powder cleaning platform with adjustable arm length also includes a stopper, each swing arm is configured with two of the stoppers, and the two stoppers clamp the flip platform, and the stoppers are connected to the swing arm.

[0014] Furthermore, the support frame includes two bearing seats, the two bearing seats are arranged in parallel and alternately, and the swing arm is rotatably mounted on the bearing seats through the flip shaft.

[0015] Furthermore, each of the swing arms is correspondingly configured with two of the linear motion driving components, and the two linear motion driving components are respectively located on both sides of the swing arm.

[0016] Furthermore, the linear motion driving component is an electric cylinder.

[0017] Furthermore, the flip powder cleaning table with adjustable arm length also includes an air hammer, and the number of the air hammers is multiple, and the multiple air hammers are evenly distributed in a circle on the rotating plate.

[0018] An additive manufacturing device comprises the above-mentioned flip powder cleaning table with adjustable arm length, and also comprises a frame and a base plate, wherein the base plate is used to carry the printed workpiece, and the support frame is connected to the frame; when the workpiece is being cleaned of powder, the base plate is fixed on the rotating plate.

[0019] The beneficial effect of the utility model is that after the main machine of the additive manufacturing equipment completes the printing of the workpiece, the existing rotating mechanism directly transfers the workpiece together with the substrate to the flip powder cleaning table, and at the same time transfers another set of spare substrates to the additive manufacturing equipment for secondary printing. The powder cleaning operation is carried out simultaneously with the printing and construction, which greatly improves the production efficiency. The substrate to be cleaned is installed on the rotating plate of the flip powder cleaning table. For workpieces of different heights and different weights, the flip platform is driven to rise and fall under the action of the linear moving drive member, so as to adjust the length of the swing arm, and make the rotation center line of the swing arm and the flip driving mechanism rotatingly connected to pass through the center of gravity of the workpiece as much as possible, so as to reduce the eccentric torque in the flipping process, thereby reducing the required output torque. At the same time, the flip powder cleaning table has a rotation function, specifically, the rotating drive mechanism drives the rotating plate to rotate. Therefore, the flip powder cleaning table of the utility model has the dual functions of rotation and flipping, can realize the hovering of the workpiece at any angle, can ensure that the residual powder in the workpiece is cleaned out in a relatively short time, and can be applied to the cleaning of complex workpieces, reducing the labor intensity of workers, and speeding up the progress of subsequent processing of workpieces, providing a strong guarantee for the reliability of continuous printing of the equipment. Furthermore, under the vibration of multiple air hammers on the rotating plate, the powder can be quickly cleaned, which can be applied to workpieces with complex flow channels inside. Therefore, the utility model realizes fast powder cleaning, reduces the waiting time for powder cleaning, and cleans the powder thoroughly, shortens the process of cleaning the residual powder inside the subsequent workpiece, reduces the waste of powder, realizes unmanned operation of powder cleaning, and finally achieves the purpose of cleaning all powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 for Figure 1 A stereogram after being rotated to a certain angle;

[0023] Figure 3 It is a schematic diagram of the structure of the utility model;

[0024] Figure 4 for Figure 3 AA section view.

[0025] The above reference numerals:

[0026] 1. Bearing seat; 2. Swing arm; 3. Flip platform; 4. Rotating plate; 5. Linear motion drive member; 6. Flip driving mechanism; 60. Flip motor; 61. Reducer; 62. Flip shaft; 7. Air hammer; 8. Block; 9. Rotating motor; 20. Limit step; 21. Groove. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] Example

[0029] like Figure 1-4 As shown, the present embodiment provides a flip powder cleaning table with adjustable arm length, comprising a support frame, a swing arm 2, a flip platform 3, a rotating plate 4, a rotation drive mechanism, a flip drive mechanism 6 and a linear motion drive member 5; the number of the swing arms 2 is two, the two swing arms 2 are arranged in parallel and alternately, and the two swing arms 2 are rotatably connected to the support frame through the flip drive mechanism 6;

[0030] Each of the swing arms 2 is provided with the linear motion driving member 5, the flip platform 3 is located between the two swing arms 2, and the linear motion driving member 5 is connected to the flip platform 3, and the linear motion driving member 5 drives the flip platform 3 to perform lifting motion;

[0031] The rotating plate 4 is located above the flip platform 3 and is rotatably mounted on the flip platform 3; the rotating drive mechanism is located below the rotating plate 4, the rotating drive mechanism is mounted on the flip platform 3 and is connected to the rotating plate 4, and the rotating drive mechanism drives the rotating plate 4 to perform a rotating motion.

[0032] After the main machine of the additive manufacturing equipment completes printing of the workpiece, the existing transfer mechanism transfers the workpiece together with the substrate directly to the flip powder cleaning table, and at the same time transfers another set of spare substrates to the additive manufacturing equipment for secondary printing. The powder cleaning operation is carried out simultaneously with printing and construction, which greatly improves production efficiency.

[0033] The substrate to be cleaned is mounted on the rotating plate 4 of the flip cleaning table. Specifically, the substrate is fixed to the rotating plate 4 by fasteners such as bolts or screws. For workpieces of different heights and weights, the flip platform 3 is driven to rise and fall under the action of the linear motion drive member 5, so as to adjust the length of the swing arm 2, and make the rotation center line of the swing arm 2 and the flip drive mechanism 6 rotationally connected to pass through the center of gravity of the workpiece as much as possible, so as to reduce the eccentric torque during the flipping process, thereby reducing the required output torque, so as to adapt to workpieces with different center of gravity heights. At the same time, the flip cleaning table has a rotation function. Specifically, the rotation drive mechanism drives the rotating plate 4 to rotate. Therefore, the flip cleaning table of this embodiment has the dual functions of rotation and flipping, can realize the hovering of the workpiece at any angle, can ensure that the residual powder in the workpiece is cleaned out in a relatively short time, and can be applied to the cleaning of complex workpieces, reducing the labor intensity of workers, and speeding up the progress of subsequent processing of workpieces, providing a strong guarantee for the reliability of continuous printing of the equipment. This embodiment achieves rapid powder cleaning, reduces the waiting time for powder cleaning, and at the same time, thoroughly cleans the powder, shortens the subsequent process of cleaning residual powder inside the workpiece, reduces powder waste, realizes unmanned operation of powder cleaning, and ultimately achieves the purpose of cleaning all powder.

[0034] In this embodiment, preferably, guide grooves are provided on both sides of the flip platform 3 for movement and coordination with the swing arm 2 , so as to guide the lifting and lowering of the flip platform 3 .

[0035] In this embodiment, the rotary drive mechanism preferably includes a rotary motor 9 and a gear transmission structure, wherein the rotary motor 9 is installed below the flip platform 3, the gear transmission structure is installed in the middle of the flip platform 3, and the rotary motor 9 is connected to the rotating plate 4 through the gear transmission structure. When the rotary drive mechanism is working, the rotary motor 9 drives the gear transmission structure to move, and the gear transmission structure drives the rotating plate 4 to rotate, thereby driving the substrate and the workpiece on the rotating plate 4 to rotate synchronously. The gear transmission structure is a structure in which two gears are meshed, which is an existing mature technology, so it will not be elaborated in detail.

[0036] In this embodiment, the flip drive mechanism 6 preferably includes a flip motor 60, a speed reducer 61 and a flip shaft 62, the swing arm 2 is rotatably mounted on the support frame via the flip shaft 62, and the flip motor 60 is connected to one of the flip shafts 62 via the speed reducer 61. When the flip drive mechanism 6 is working, the flip motor 60 is started, and the flip shaft 62 is driven to rotate via the speed reducer 61, and the swing arm 2 is rotatably mounted on the support frame via the flip shaft 62, so the rotation of the flip shaft 62 will drive the swing arm 2 to rotate on the support frame, thereby driving the swing arm 2, the flip platform 3, the rotating plate 4, the substrate and the workpiece to flip synchronously together.

[0037] In this embodiment, preferably, a limiting step 20 is provided below the swing arm 2, and the limiting steps 20 of the two swing arms 2 are arranged opposite to each other, and the limiting step 20 is used for the lower limit of the flip platform 3. Under the action of the limiting step 20, the flip platform 3 plays a role in lower limit protection when moving downward.

[0038] In this embodiment, the flip powder cleaning table with adjustable arm length further includes a stopper 8, each swing arm 2 is provided with two stoppers 8, and the two stoppers 8 clamp the flip platform 3, and the stopper 8 is connected to the swing arm 2. For workpieces of different heights and weights, the flip platform 3 is driven to rise and fall under the action of the linear motion drive member 5, so as to adjust the length of the swing arm 2, and make the rotation center line of the swing arm 2 and the flip drive mechanism 6 pass through the center of gravity of the workpiece as much as possible, that is, the flip axis 62 passes through the center of gravity of the workpiece. After the position of the flip platform 3 is adjusted, for each swing arm 2: two stoppers 8 are fixed above and below the flip platform 3, and the two stoppers 8 clamp the flip platform 3, wherein both sides of the flip platform 3 are limited by stoppers 8 to ensure that the position of the flip platform 3 will not change when the flip platform 3 is flipped. The stopper 8 is connected to the swing arm 2 by bolts or screws.

[0039] In this embodiment, a groove 21 is provided on the inner side of the swing arm 2 , and the groove 21 is used to accommodate the stopper 8 .

[0040] In this embodiment, the support frame includes two bearing seats 1, which are arranged in parallel and spaced apart, and the swing arm 2 is rotatably mounted on the bearing seats 1 through the flip shaft 62. The swing arm 2, the rotating plate 4, and the flip platform 3 are located between the two bearing seats 1.

[0041] In this embodiment, preferably, each swing arm 2 is configured with two linear motion driving members 5, and the two linear motion driving members 5 are respectively located on both sides of the swing arm 2. The design of multiple linear motion driving members 5 ensures that the flip platform 3 will not deflect during the lifting movement.

[0042] The linear motion driving member 5 in this embodiment is an electric cylinder, and may also be an oil cylinder or an air cylinder, etc. An electric cylinder is preferably used.

[0043] In this embodiment, the flip powder cleaning table with adjustable arm length further includes a pneumatic hammer 7, and the number of the pneumatic hammers 7 is multiple, and the multiple pneumatic hammers 7 are evenly distributed on the rotating plate 4. When the substrate is fixed on the rotating plate 4, the substrate is located inside the multiple pneumatic hammers 7. Under the vibration of the pneumatic hammers 7, the powder is quickly cleaned, and the residual powder in the complex workpiece can be cleaned out in a short time, especially for the workpiece with complex flow channels inside, so that the workpiece has no residual powder and the waste of powder is reduced.

[0044] An additive manufacturing device includes the flip powder cleaning table with adjustable arm length, a frame and a base plate, wherein the base plate is used to carry the printed workpiece, and the support frame is connected to the frame. Specifically, the bearing seat 1 is connected to the frame by fasteners such as bolts or screws; when the workpiece is cleaned, the base plate is fixed on the rotating plate 4.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A flip powder cleaning table with adjustable arm length, characterized in that: It comprises a support frame, a swing arm (2), a flip platform (3), a rotating plate (4), a rotation drive mechanism, a flip drive mechanism (6) and a linear motion drive member (5); the number of the swing arms (2) is two, the two swing arms (2) are arranged in parallel and spaced apart, and the two swing arms (2) are rotationally connected to the support frame through the flip drive mechanism (6); Each of the swing arms (2) is provided with the linear motion driving member (5), the flip platform (3) is located between the two swing arms (2), and the linear motion driving member (5) is connected to the flip platform (3), and the linear motion driving member (5) drives the flip platform (3) to perform lifting movement; The rotating plate (4) is located above the flipping platform (3) and is rotatably mounted on the flipping platform (3); the rotating drive mechanism is located below the rotating plate (4), the rotating drive mechanism is mounted on the flipping platform (3) and is connected to the rotating plate (4), and the rotating drive mechanism drives the rotating plate (4) to perform a rotating motion.

2. The flip powder cleaning table with adjustable arm length according to claim 1 is characterized in that: The rotary drive mechanism comprises a rotary motor (9) and a gear transmission structure, wherein the rotary motor (9) is installed below the flip platform (3), the gear transmission structure is installed in the middle of the flip platform (3), and the rotary motor (9) is connected to the rotary plate (4) via the gear transmission structure.

3. The flip powder cleaning table with adjustable arm length according to claim 1 is characterized in that: The flipping drive mechanism (6) comprises a flipping motor (60), a speed reducer (61) and a flipping shaft (62); the swing arm (2) is rotatably mounted on the support frame via the flipping shaft (62); and the flipping motor (60) is connected to one of the flipping shafts (62) via the speed reducer (61).

4. The flip powder cleaning table with adjustable arm length according to claim 1 is characterized in that: A limiting step (20) is provided below the swing arm (2), and the limiting steps (20) of the two swing arms (2) are arranged opposite to each other, and the limiting step (20) is used for the lower limit of the turning platform (3).

5. The flip powder cleaning table with adjustable arm length according to claim 1 is characterized in that: The flip powder cleaning platform with adjustable arm length also includes a stopper (8), each swing arm (2) is equipped with two stoppers (8), and the two stoppers (8) clamp the flip platform (3), and the stoppers (8) are connected to the swing arm (2).

6. The flip powder cleaning table with adjustable arm length according to claim 3 is characterized in that: The support frame comprises two bearing seats (1), the two bearing seats (1) are arranged in parallel and spaced apart, and the swing arm (2) is rotatably mounted on the bearing seats (1) via the flip shaft (62).

7. The flip powder cleaning table with adjustable arm length according to claim 1 is characterized in that: Each swing arm (2) is correspondingly configured with two linear motion driving components (5), and the two linear motion driving components (5) are respectively located on two sides of the swing arm (2).

8. The flip powder cleaning table with adjustable arm length according to claim 1, characterized in that: The linear motion driving member (5) is an electric cylinder.

9. The flip powder cleaning table with adjustable arm length according to claim 1, characterized in that: The flip powder cleaning table with adjustable arm length also includes an air hammer (7). There are a plurality of air hammers (7), and the plurality of air hammers (7) are evenly distributed in a circle on the rotating plate (4).

10. An additive manufacturing device, characterized in that: The flip powder cleaning table with adjustable arm length comprises the one described in any one of claims 1 to 9, and also comprises a frame and a base plate, wherein the base plate is used to support the printed workpiece, and the support frame is connected to the frame; when the workpiece is being cleaned, the base plate is fixed on the rotating plate (4).

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