A metal additive manufacturing powder bed preheating device

Abstract

This utility model belongs to the technical field of metal additive manufacturing equipment and discloses a metal additive manufacturing powder bed preheating device, including a preheating box. An adjusting plate is movably connected to the middle of the front end of the preheating box. A first motor is fixedly sleeved on the inner surface of the bottom end of the adjusting plate, and a rotating shaft is fixedly sleeved on the other end of the output shaft of the first motor. This utility model sets up an adjusting plate, a diagonal rod, a rectangular block, a second motor, and a threaded rod. When the second motor is started, the threaded rod will rotate. Since the outer surface of the threaded rod and the inner surface of the rectangular block are threaded together, the rectangular block will move with the diagonal rod as the threaded rod rotates. This causes the diagonal rod to generate a thrust on the adjusting plate, pushing the adjusting plate along the outer surface of the T-shaped block, moving the first motor, the rotating shaft, and the protrusion. In this way, the vibration amplitude of the preheating device can be adjusted by adjusting the height of the protrusion.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal additive manufacturing equipment, specifically a metal additive manufacturing powder bed preheating device. Background Technology

[0002] Metal additive manufacturing, also known as metal 3D printing, is a technology that uses digital model files as a basis and employs bondable materials such as powdered metal or metal wires to construct objects layer by layer. Compared with traditional subtractive manufacturing (such as cutting and drilling) and material-based manufacturing (such as casting and forging), metal additive manufacturing has unique advantages and characteristics. However, the powder needs to be preheated during metal additive manufacturing.

[0003] A search revealed a metal additive manufacturing powder bed preheating device (CN217290417U). The device proposed fixing the preheating tube to the preheating plate with screws. However, during operation, the screws were easily stripped, making subsequent disassembly inconvenient. Furthermore, the large accumulation of metal powder resulted in suboptimal heating. By incorporating compression blocks and protrusions, pressing the compression block causes the housing to detach from the fixed housing, allowing the preheating tube to be removed by pulling the handle. The protrusion structure allows the preheating plate to move intermittently, thus improving heating efficiency. When the hot plate falls, the support plate and the movable column slide together and are reset by the action of the third spring. This reciprocating motion causes the preheating plate to vibrate, which has the advantages of easy disassembly and uniform heating. However, in actual use, there are still some shortcomings. Since the shape and size of the protrusions are fixed, the vibration amplitude of the preheating plate is also fixed. When the amount of metal powder is small, the violent vibration will cause the metal powder to scatter more violently. At this time, the amount of powder adhering to the inner wall of the preheating box will also increase. Therefore, this needs to be improved. Utility Model Content

[0004] The purpose of this invention is to address the above problems by providing a metal additive manufacturing powder bed preheating device, which has the advantage of easy adjustment of the vibration amplitude.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metal additive manufacturing powder bed preheating device, comprising a preheating box, an adjusting plate movably connected to the middle of the front end of the preheating box, a first motor fixedly sleeved on the inner surface of the bottom end of the adjusting plate, a rotating shaft fixedly sleeved on the other end of the output shaft of the first motor, the outer surface of the rotating shaft movably sleeved with the inner surface of the bottom of the front end of the preheating box, a protrusion fixedly sleeved on the rear end of the outer surface of the rotating shaft, the front end of the protrusion movably connected with the inner wall of the front side of the preheating box, and the bottom of the inner surface of the top end of the adjusting plate movably sleeved with... A T-shaped block is attached, with its rear end fixedly connected to the front end of the preheating box. A diagonal rod is hinged to the middle of the top of the adjusting plate, and a rectangular block is hinged to the other end of the diagonal rod. The rear end of the rectangular block is movably connected to the front end of the preheating box. A second motor is fixedly installed on the top of the left front side of the preheating box. A threaded rod is fixedly sleeved on the other end of the output shaft of the second motor. The left side of the outer surface of the threaded rod is threadedly sleeved on the inner surface of the rectangular block. A support block is movably sleeved on the right end of the outer surface of the threaded rod. The rear end of the support block is fixedly connected to the front end of the preheating box.

[0006] As a preferred embodiment of this utility model, a limiting groove is provided on the left side of the top front end of the preheating box, and a limiting block is movably sleeved inside the left side of the limiting groove. The front end of the limiting block and the rear end of the rectangular block are fixedly connected.

[0007] As a preferred embodiment of the present invention, a positioning groove is provided at the top of the front end of the preheating box, located above the threaded rod. A positioning rod located behind the rectangular block is movably sleeved inside the positioning groove, and the front end of the positioning rod extends through the rectangular block to the outside of the rectangular block.

[0008] In a preferred embodiment of this utility model, a square plate is fixedly sleeved on the rear side of the outer surface of the positioning rod, the outer surface of the square plate is movably sleeved on the rear side of the inner surface of the rectangular block, and a built-in spring located outside the positioning rod is fixedly installed at the front end of the square plate, and the other end of the built-in spring is fixedly connected to the inner surface of the rectangular block.

[0009] As a preferred embodiment of this utility model, a round shaft is fixedly installed at the front end of the positioning rod, and a handle is movably sleeved on the outer surface of the round shaft, with the rear end of the handle being movably connected to the front end of the rectangular block.

[0010] As a preferred embodiment of this utility model, a preheating plate is movably sleeved at the bottom of the preheating box, the bottom of the preheating plate is movably connected to the outer surface of the protrusion, and a preheating pipe is fixedly sleeved inside the preheating plate.

[0011] As a preferred embodiment of this utility model, a movable column is fixedly installed at the middle of the bottom end of the preheating plate, a support plate is movably sleeved on the bottom of the outer surface of the movable column, the outer surface of the support plate is fixedly sleeved on the bottom of the inner surface of the preheating box, a connecting spring located outside the movable column is fixedly installed at the bottom end of the preheating plate, and the other end of the connecting spring is fixedly connected to the top end of the support plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention comprises an adjusting plate, a diagonal rod, a rectangular block, a second motor, and a threaded rod. When the second motor is started, the threaded rod will rotate. Since the outer surface of the threaded rod and the inner surface of the rectangular block are threaded together, the rectangular block will move along with the diagonal rod as the threaded rod rotates. This causes the diagonal rod to exert a thrust on the adjusting plate, pushing the adjusting plate along the outer surface of the T-shaped block, moving the first motor, the rotating shaft, and the protrusion. In this way, the vibration amplitude of the preheating device can be adjusted by adjusting the height of the protrusion. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the rear side of the present invention;

[0016] Figure 3 This is a cross-sectional view of the side of the present invention;

[0017] Figure 4 This is a cross-sectional view of the handle of this utility model.

[0018] Figure 5 This is a cross-sectional view of the rectangular block of this utility model;

[0019] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 1. Preheating box; 2. Adjusting plate; 3. First motor; 4. Rotating shaft; 5. Protrusion; 6. T-block; 7. Diagonal rod; 8. Rectangular block; 9. Second motor; 10. Threaded rod; 11. Support block; 12. Limiting groove; 13. Limiting block; 14. Positioning groove; 15. Positioning rod; 16. Square plate; 17. Built-in spring; 18. Round shaft; 19. Handle; 20. Preheating plate; 21. Preheating pipe; 22. Movable column; 23. Support plate; 24. Connecting spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 6 As shown, this utility model provides a preheating device for a powder bed in metal additive manufacturing, including a preheating box 1. An adjusting plate 2 is movably connected to the middle of the front end of the preheating box 1. A first motor 3 is fixedly sleeved on the inner surface of the bottom end of the adjusting plate 2. A rotating shaft 4 is fixedly sleeved on the other end of the output shaft of the first motor 3. The outer surface of the rotating shaft 4 is movably sleeved with the inner surface of the bottom of the front end of the preheating box 1. A protrusion 5 is fixedly sleeved on the rear end of the outer surface of the rotating shaft 4. The front end of the protrusion 5 is movably connected to the inner wall of the front side of the preheating box 1. A T-shaped block 6 is movably sleeved on the bottom of the inner surface of the top end of the adjusting plate 2. The rear end of the T-shaped block 6 is fixedly connected to the front end of the preheating box 1. A diagonal rod 7 is hinged to the middle of the top end of the adjusting plate 2. A rectangular block 8 is hinged to the other end of the diagonal rod 7. The rear end of the rectangular block 8 is movably connected to the front end of the preheating box 1. A second motor 9 is fixedly installed on the top of the front left side of the preheating box 1. The second motor 9 outputs... The other end of the shaft is fixedly sleeved with a threaded rod 10. The left side of the outer surface of the threaded rod 10 is threadedly sleeved with the inner surface of the rectangular block 8. The right end of the outer surface of the threaded rod 10 is movably sleeved with a support block 11. The rear end of the support block 11 is fixedly connected to the front end of the preheating box 1. When the second motor 9 is started, the threaded rod 10 will rotate along the inner surface of the support block 11. Since the threaded rod 10 and the rectangular block 8 are threadedly sleeved, under the action of the threaded rod 10, the rectangular block 8 will move along the outer surface of the preheating box 1 with the top end of the inclined rod 7. This will cause the other end of the inclined rod 7 to generate a thrust on the adjusting plate 2, pushing the adjusting plate 2 along the outer surface of the T-shaped block 6 with the first motor 3, the rotating shaft 4 and the protrusion 5. This will allow the height of the protrusion 5 to be adjusted, thereby adjusting the vibration amplitude of the preheating device by adjusting the height of the protrusion 5.

[0023] In this design, a limiting groove 12 is provided on the left side of the top front end of the preheating box 1. A limiting block 13 is movably sleeved inside the left side of the limiting groove 12. The front end of the limiting block 13 is fixedly connected to the rear end of the rectangular block 8. The inner surface of the limiting groove 12 and the outer surface of the limiting block 13 are both smooth, thus ensuring that the limiting block 13 will not get stuck when it moves along the inner surface of the limiting groove 12. At the same time, the mutual cooperation between the limiting groove 12 and the limiting block 13 will restrict the movement of the rectangular block 8, thereby ensuring the stability of the movement of the rectangular block 8.

[0024] The preheating box 1 has a positioning groove 14 located above the threaded rod 10 at the top of the front end. The positioning groove 14 is movably fitted with a positioning rod 15 located behind the rectangular block 8. The front end of the positioning rod 15 extends through the rectangular block 8 to the outside of the rectangular block 8. The positioning grooves 14 are evenly distributed at the front end of the preheating box 1. By interlocking the positioning rod 15 with the positioning grooves 14 at different positions, the position of the rectangular block 8 can be locked, thereby ensuring the stability of the rectangular block 8 after movement and preventing the rectangular block 8 from moving accidentally.

[0025] A square plate 16 is fixedly sleeved on the rear side of the outer surface of the positioning rod 15. The outer surface of the square plate 16 is movably sleeved on the rear side of the inner surface of the rectangular block 8. An internal spring 17 located outside the positioning rod 15 is fixedly installed at the front end of the square plate 16. The other end of the internal spring 17 is fixedly connected to the inner surface of the rectangular block 8. When the positioning rod 15 moves along the inner surface of the rectangular block 8, the square plate 16 fixedly sleeved with the positioning rod 15 will move along with it and compress the internal spring 17. Under the restoring action of the internal spring 17, the square plate 16 and the positioning rod 15 will be forced to return to their original positions, so that the positioning rod 15 is embedded in the positioning groove 14 at the corresponding position.

[0026] The positioning rod 15 has a round shaft 18 fixedly installed at its front end. A handle 19 is movably sleeved on the outer surface of the round shaft 18. The rear end of the handle 19 is movably connected to the front end of the rectangular block 8. When the handle 19 is turned, it will rotate around the round shaft 18. Since the bottom end of the handle 19 is longer than the side of the handle 19, the round shaft 18 will be lifted by the handle 19 as the handle 19 rotates, thereby causing the round shaft 18 to move along with the positioning rod 15.

[0027] The preheating plate 20 is movably sleeved at the bottom of the preheating box 1. The bottom of the preheating plate 20 is movably connected to the outer surface of the protrusion 5. The preheating tube 21 is fixedly sleeved inside the preheating plate 20. When the protrusion 5 rotates, the preheating plate 20 will be continuously pushed up by the protrusion 5, so that the preheating plate 20 moves up and down along the inner surface of the preheating box 1, thereby realizing the shaking of the preheating plate 20.

[0028] The preheating plate 20 has a movable column 22 fixedly installed at the middle of its bottom end. A support plate 23 is movably sleeved on the bottom of the outer surface of the movable column 22. The outer surface of the support plate 23 is fixedly sleeved on the bottom of the inner surface of the preheating box 1. A connecting spring 24 located outside the movable column 22 is fixedly installed at the bottom end of the preheating plate 20. The other end of the connecting spring 24 is fixedly connected to the top of the support plate 23. When the preheating plate 20 is pushed upward, it will move upward with the movable column 22 and stretch the connecting spring 24. Under the restoring action of the connecting spring 24, the preheating plate 20 will be forced to return to its original position.

[0029] Working principle and usage process of this utility model:

[0030] After the metal powder is poured into the preheating box 1, the first motor 3 is started, causing the rotating shaft 4 to rotate with the protrusion 5. This pushes the preheating plate 20 through the protrusion 5, causing the preheating plate 20 to move along the inner surface of the preheating box 1 along with the movable column 22 and stretch the connecting spring 24. Under the restoring action of the connecting spring 24, when the protrusion 5 stops pushing the preheating plate 20, the preheating plate 20 will return to its original position. This cycle is repeated to achieve the shaking of the preheating plate 20. When there is too little metal powder, the operator moves the handle 19 before starting the first motor 3, causing the handle 19 to rotate around the circular shaft 18. This causes the circular shaft 18 to move along the inner surface of the rectangular block 8 along with the positioning rod 15 and the square plate 16 under the action of the handle 19 and compress the built-in spring 17. When the handle 19 rotates 90 degrees, the handle 19 will be stopped by the restoring action of the built-in spring 17. At this time, the positioning rod 15 will also be completely separated from the positioning groove 14, releasing the locking of the position of the rectangular block 8 by the positioning rod 15.

[0031] The operator then starts the second motor 9, causing the threaded rod 10 to rotate. This causes the rectangular block 8, which is threaded onto the outer surface of the threaded rod 10, to move along with the top of the inclined rod 7. Consequently, the bottom of the inclined rod 7 exerts a pushing force on the adjusting plate 2, pushing the adjusting plate 2, along with the first motor 3, the rotating shaft 4, and the protrusion 5, downwards along the outer surface of the T-shaped block 6. This adjusts the height of the protrusion 5. Once the height of the protrusion 5 is adjusted, the operator resets the handle 19. At this point, under the restoring action of the built-in spring 17, the square plate 16, along with the positioning rod 15, returns to its original position, allowing the positioning rod 15 to embed into the corresponding positioning groove 14, thus relocking the rectangular block 8. In this way, the vibration amplitude of the preheating device can be adjusted by adjusting the height of the protrusion 5.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal additive manufacturing powder bed preheating device, comprising a preheating chamber (1), characterized in that: An adjusting plate (2) is movably connected to the middle of the front end of the preheating box (1). A first motor (3) is fixedly sleeved on the inner surface of the bottom end of the adjusting plate (2). A rotating shaft (4) is fixedly sleeved on the other end of the output shaft of the first motor (3). The outer surface of the rotating shaft (4) is movably sleeved on the inner surface of the bottom of the front end of the preheating box (1). A protrusion (5) is fixedly sleeved on the rear end of the outer surface of the rotating shaft (4). The front end of the protrusion (5) is movably connected to the inner wall of the front side of the preheating box (1). A T-shaped block (6) is movably sleeved on the bottom of the inner surface of the top end of the adjusting plate (2). The rear end of the T-shaped block (6) is fixedly connected to the front end of the preheating box (1). Next, a diagonal rod (7) is hinged to the middle of the top of the adjustment plate (2), and a rectangular block (8) is hinged to the other end of the diagonal rod (7). The rear end of the rectangular block (8) is movably connected to the front end of the preheating box (1). A second motor (9) is fixedly installed on the top of the front left side of the preheating box (1). A threaded rod (10) is fixedly sleeved on the other end of the output shaft of the second motor (9). The left side of the outer surface of the threaded rod (10) is threadedly sleeved to the inner surface of the rectangular block (8). A support block (11) is movably sleeved on the right end of the outer surface of the threaded rod (10). The rear end of the support block (11) is fixedly connected to the front end of the preheating box (1).

2. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: A limiting groove (12) is provided on the left side of the top front end of the preheating box (1). A limiting block (13) is movably sleeved inside the limiting groove (12) on the left side. The front end of the limiting block (13) is fixedly connected to the rear end of the rectangular block (8).

3. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: The preheating box (1) has a positioning groove (14) at the top of the front end, located above the threaded rod (10). The positioning groove (14) is movably fitted with a positioning rod (15) located behind the rectangular block (8). The front end of the positioning rod (15) extends through the rectangular block (8) to the outside of the rectangular block (8).

4. The metal additive manufacturing powder bed preheating device according to claim 3, characterized in that: A square plate (16) is fixedly sleeved on the rear side of the outer surface of the positioning rod (15). The outer surface of the square plate (16) and the rear side of the inner surface of the rectangular block (8) are movably sleeved. An internal spring (17) located outside the positioning rod (15) is fixedly installed at the front end of the square plate (16). The other end of the internal spring (17) is fixedly connected to the inner surface of the rectangular block (8).

5. A metal additive manufacturing powder bed preheating device according to claim 3, characterized in that: The front end of the positioning rod (15) is fixedly installed with a round shaft (18), and a handle (19) is movably sleeved on the outer surface of the round shaft (18). The rear end of the handle (19) is movably connected to the front end of the rectangular block (8).

6. The metal additive manufacturing powder bed preheating device according to claim 1, characterized in that: The bottom of the preheating box (1) is movably sleeved with a preheating plate (20), the bottom of the preheating plate (20) is movably connected to the outer surface of the protrusion (5), and a preheating pipe (21) is fixedly sleeved inside the preheating plate (20).

7. A metal additive manufacturing powder bed preheating device according to claim 6, characterized in that: A movable column (22) is fixedly installed at the middle of the bottom end of the preheating plate (20). A support plate (23) is movably sleeved on the bottom of the outer surface of the movable column (22). The outer surface of the support plate (23) is fixedly sleeved on the bottom of the inner surface of the preheating box (1). A connecting spring (24) located outside the movable column (22) is fixedly installed at the bottom end of the preheating plate (20). The other end of the connecting spring (24) is fixedly connected to the top end of the support plate (23).

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