Laser melting forming machining device

Abstract

The utility model relates to the field of laser 3D printing, and discloses a laser melting forming machining device which comprises a laser transmission pipe, a feeding box is fixedly connected to the periphery of the laser transmission pipe, a connecting hose is arranged at the bottom of the feeding box, and a laser nozzle is detachably connected to the bottom end of the connecting hose through a connecting assembly. A laser groove is formed in the laser nozzle, a powder feeding groove is formed in the laser nozzle, a threaded groove is formed in the periphery of the laser nozzle, a rotating circular ring is in threaded connection with the periphery of the threaded groove, and an extrusion circular ring is fixedly connected to the bottom of the rotating circular ring. According to the utility model, by arranging the structures such as the inclined surface convex block and the limiting block, the extrusion circular ring is rotated to move up and down, and the extrusion cylinder in the powder feeding groove moves horizontally under the action of the limiting spring, so that the channel size of the powder feeding groove can be conveniently controlled, and therefore, the powder feeding amount can be conveniently controlled, and the printing precision can be improved.

Description

Technical Field

[0001] This utility model relates to the field of laser 3D printing, and in particular to a laser melting and forming processing device. Background Technology

[0002] Laser 3D printing is an advanced 3D printing technology that uses a laser beam to melt the material and build a three-dimensional solid by layer-by-layer polymerization. Compared with traditional FDM technology, this technology has the advantages of high precision, high speed, and multi-material printing, and can manufacture complex metal structures. It is suitable for many fields such as aerospace, automotive industry, and medical.

[0003] In order to facilitate the melting of metal powder under the action of high-energy laser, a laser melting and forming processing device is needed.

[0004] Current laser melting and forming processing devices typically have a powder feeding channel inside the laser nozzle, through which metal powder is fed to the central laser. However, in actual use, the diameter of the powder feeding channel is usually a fixed size, making it impossible to control the amount of powder fed. This can result in excessive powder feeding, causing the edges of the printed items to be too thick, failing to achieve the desired shape, and resulting in insufficient printing accuracy. On the other hand, the powder feeding channel may become clogged after prolonged use, making cleaning troublesome. Therefore, a laser melting and forming processing device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a laser melting and forming processing device, which aims to improve the problems of the inability to control the amount of metal powder fed and the relatively troublesome cleaning of the powder feeding channel in the prior art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a laser melting and forming processing device, including a laser transmission tube, a feeding box fixedly connected to the outer periphery of the laser transmission tube, a connecting hose provided at the bottom of the feeding box, a laser nozzle detachably connected to the bottom end of the connecting hose via a connecting assembly, a laser groove and a powder feeding groove opened inside the laser nozzle, a threaded groove opened on the outer periphery of the laser nozzle, a rotating ring threadedly connected to the outer periphery of the threaded groove, a pressing ring fixedly connected to the bottom of the rotating ring, a beveled protrusion contacting the inner side of the pressing ring, a limit groove opened inside the beveled protrusion, a limit block elastically connected to the inner side of the limit groove via a limit spring, a pressing cylinder fixedly connected to the inner side of the limit block, and a snap-fit ​​assembly provided on the outer periphery of the laser transmission tube for fixing the connecting hose.

[0007] As a further description of the above technical solution:

[0008] The connecting assembly includes a fixed ring, which is fixedly connected to the bottom outer periphery of the connecting hose. A threaded sleeve is fixedly connected to the bottom of the fixed ring, and a connecting seat is threadedly connected to the outer periphery of the threaded sleeve. A sealing rubber ring is placed on the inner wall of the bottom end of the connecting seat, and the outer periphery of the connecting seat is rotatably connected to the inside of the powder feeding trough.

[0009] As a further description of the above technical solution:

[0010] The top of the laser nozzle is fixedly connected to the bottom of the laser transmission tube, and the top of the laser slot is connected to the inside of the laser transmission tube.

[0011] As a further description of the above technical solution:

[0012] The powder feeding trough is provided in several groups, and the several groups of powder feeding troughs are equidistantly distributed inside the laser nozzle along the conical surface. The axes of the several groups of powder feeding troughs extend downward and intersect at a point located on the central axis of the laser trough.

[0013] As a further description of the above technical solution:

[0014] The front cross-section of the rotating ring is inverted L-shaped.

[0015] As a further description of the above technical solution:

[0016] Both the outer side of the inclined protrusion and the inner side of the extrusion ring are set as inclined surfaces. The outer side of the limiting block is in contact with the inner inclined surface of the extrusion ring, and the inner inclined surface of the extrusion ring is adapted to the outer inclined surface of the inclined protrusion.

[0017] As a further description of the above technical solution:

[0018] One end of the limiting spring is fixedly connected to the inner side of the limiting groove, and the other end of the limiting spring is fixedly connected to the inner side of the limiting block. The outer periphery of the limiting block is slidably connected to the inside of the limiting groove.

[0019] As a further description of the above technical solution:

[0020] The inner side of the extrusion cylinder is set as an arc surface, and the outer circumference of the extrusion cylinder is slidably connected to the inside of the laser nozzle. The inner side of the extrusion cylinder is in contact with the inner wall of the side of the powder feeding trough.

[0021] As a further description of the above technical solution:

[0022] The snap-fit ​​assembly includes a fixing groove, which is formed on the outer periphery of the laser transmission tube. A fixing buckle is fixedly connected to the inner wall of the side of the fixing groove, and the fixing buckle is snapped into the outer periphery of the connecting hose.

[0023] As a further description of the above technical solution:

[0024] The outer periphery of the connecting hose is fixedly connected to the inside of the threaded sleeve, and the bottom of the threaded sleeve is in contact with the top of the sealing ring.

[0025] This utility model has the following beneficial effects:

[0026] 1. In this utility model, by setting up structures such as inclined protrusions and limiting blocks, rotating the extrusion ring causes the extrusion ring to move up and down. Under the action of the limiting spring, the extrusion cylinder in the powder feeding groove moves horizontally, which conveniently controls the channel size of the powder feeding groove, thereby conveniently controlling the powder feeding amount and improving printing accuracy.

[0027] 2. In this utility model, by setting a connecting seat, threaded sleeve and other mechanisms, the connecting hose can be easily removed. Thus, when powder blockage occurs in the powder feeding tank, the connecting hose can be quickly removed and the blockage can be quickly cleared using equipment such as an air pump, making it more convenient to use. Attached Figure Description

[0028] Figure 1 This is a front view of the laser melting and forming processing device proposed in this utility model;

[0029] Figure 2 This is a front cross-sectional view of the laser transmission tube of a laser melting and forming processing device proposed in this utility model;

[0030] Figure 3 This utility model proposes a laser melting and forming processing device. Figure 2 Enlarged view of point A;

[0031] Figure 4 This is a front cross-sectional view of the connecting seat of a laser melting and forming processing device proposed in this utility model.

[0032] Legend:

[0033] 1. Laser transmission tube; 2. Feed box; 3. Connecting hose; 4. Fixing ring; 5. Threaded sleeve; 6. Connecting seat; 7. Sealing ring; 8. Laser nozzle; 9. Laser groove; 10. Powder feeding trough; 11. Threaded groove; 12. Rotating ring; 13. Extrusion ring; 14. Angled protrusion; 15. Limiting groove; 16. Limiting spring; 17. Limiting block; 18. Extrusion cylinder; 19. Fixing groove; 20. Fixing buckle. Detailed Implementation

[0034] 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.

[0035] Reference Figure 1 - Figure 2 This utility model provides an embodiment of a laser melting and forming processing device, comprising a laser transmission tube 1 for convenient laser transmission, a feeding box 2 for storing metal powder fixedly connected to the outer periphery of the laser transmission tube 1, a connecting hose 3 at the bottom of the feeding box 2, eight sets of the connecting hose 3 arranged in a ring at equal intervals at the bottom of the feeding box 2, a conveying pump at the top of the connecting hose 3 for conveying the metal powder in the feeding box 2 downwards, a laser nozzle 8 detachably connected to the bottom of the connecting hose 3 via a connecting assembly, a laser groove 9 for convenient laser transmission inside the laser nozzle 8, a top of the laser nozzle 8 fixedly connected to the bottom of the laser transmission tube 1, the top of the laser groove 9 communicating with the inside of the laser transmission tube 1 so that the laser can be ejected from the bottom of the laser nozzle 8, a powder feeding groove 10 inside the laser nozzle 8, and a powder feeding groove 10. The laser nozzle 8 is equipped with several sets of powder feeding troughs 10, which are equidistantly distributed along the conical surface inside the laser nozzle 8. The axes of the powder feeding troughs 10 extend downwards and intersect at a point located on the central axis of the laser groove 9, so that the metal powder can be melted by the laser after being conveyed by the powder feeding troughs 10. The outer periphery of the laser nozzle 8 is provided with a threaded groove 11, and a rotating ring 12 is threadedly connected to the outer periphery of the threaded groove 11. The rotating ring 12 can slide up and down on the outer wall of the threaded groove 11. The front cross-section of the rotating ring 12 is inverted L-shaped. A pressing ring 13 is fixedly connected to the bottom of the rotating ring 12. Several sets of vertical grooves are provided on the outer side of the pressing ring 13 to facilitate the rotation of the pressing ring 13. The inner side of the pressing ring 13 contacts a beveled protrusion 14. The front cross-section of the rotating ring 12 is inverted L-shaped to facilitate the entry of the beveled protrusion 14 into the inner side of the rotating ring 12.

[0036] Reference Figure 1 - Figure 2 A snap-fit ​​assembly is provided on the outer periphery of the laser transmission tube 1. The snap-fit ​​assembly is used to fix the connecting hose 3. The snap-fit ​​assembly includes a fixing groove 19, which is opened on the outer periphery of the laser transmission tube 1. A fixing buckle 20 is fixedly connected to the inner side wall of the fixing groove 19. The fixing buckle 20 has an opening on its outer side and has a certain elasticity. There are eight sets of fixing buckles 20, which are arranged in a ring at equal intervals on the inner side wall of the fixing groove 19. The fixing buckles 20 are snapped into the outer periphery of the connecting hose 3 to prevent the connecting hose 3 from falling apart.

[0037] Reference Figure 2 - Figure 3 The inclined protrusion 14 has eight sets of limiting grooves 15 arranged in a ring at equal intervals inside the inclined protrusion 14. A limiting block 17 is elastically connected to the inner side of the limiting groove 14 via a limiting spring 16. When the limiting block 17 is not under force, the limiting spring 16 pushes the limiting block 17 outward. One end of the limiting spring 16 is fixedly connected to the inner side of the limiting groove 15, and the other end is fixedly connected to the inner side of the limiting block 17. The outer circumference of the limiting block 17 is slidably connected to the inside of the limiting groove 15. The limiting groove 15 restricts the limiting block 17 to slide only along the inner wall of the limiting groove 15. The outer side of the inclined protrusion 14 and the extrusion... The inner side of the extrusion ring 13 is set as an inclined surface. The outer side of the limiting block 17 is in contact with the inner inclined surface of the extrusion ring 13. The inner inclined surface of the extrusion ring 13 is adapted to the outer inclined surface of the inclined protrusion 14. When the extrusion ring 13 moves downward, a gap will be generated between the inclined protrusion 14 and the extrusion ring 13. The inner side of the limiting block 17 is fixedly connected to an extrusion cylinder 18, which facilitates the adjustment of the size of the powder feeding groove 10. The inner side of the extrusion cylinder 18 is set as an arc surface. The outer circumference of the extrusion cylinder 18 is slidably connected to the inside of the laser nozzle 8. The inner side of the extrusion cylinder 18 is in contact with the inner wall of the side of the powder feeding groove 10. At this time, the powder feeding groove 10 is completely closed.

[0038] Reference Figure 1 and Figure 4 The connecting assembly includes a fixing ring 4 for fixing the connection. The fixing ring 4 is fixedly connected to the outer periphery of the bottom end of the connecting hose 3. A threaded sleeve 5 for fixing the connection is fixedly connected to the bottom of the fixing ring 4. The outer periphery of the connecting hose 3 is fixedly connected to the inside of the threaded sleeve 5. A connecting seat 6 is threadedly connected to the outer periphery of the threaded sleeve 5. When the connecting seat 6 is rotated, the threaded sleeve 5 will move up and down along the inner wall of the connecting seat 6 to fix the connecting hose 3. A sealing ring 7 is placed on the inner wall of the bottom end of the connecting seat 6. The bottom of the threaded sleeve 5 contacts the top of the sealing ring 7 to ensure good sealing performance between the threaded sleeve 5 and the connecting seat 6. The outer periphery of the connecting seat 6 is rotatably connected to the inside of the powder feeding tank 10.

[0039] Working principle: When you want to easily adjust the size of the powder feeding trough 10, rotate the extrusion ring 13. The extrusion ring 13 drives the rotating ring 12 to rotate. The rotating ring 12 slides down along the outer wall of the threaded groove 11. At this time, the rotating ring 12 drives the extrusion ring 13 to slide down. At this time, a gap is created between the extrusion ring 13 and the inclined protrusion 14. The limiting spring 16 pushes the limiting block 17 outward. The limiting block 17 drives the extrusion cylinder 18 to move outward. At this time, a gap is created between the extrusion cylinder 18 and the powder feeding trough 10, allowing metal powder to pass through, thus facilitating the control of the powder feeding amount. When the powder feeding trough 10 is blocked, rotate the connecting seat 6 to make the threaded sleeve 5 leave the connecting seat 6. At this time, insert the air pump's inflation port into the connecting seat 6 and turn on the air pump. The air pump will drive high-pressure gas to impact the blockage inside the powder feeding trough 10, thus quickly clearing the blockage. It is quite convenient to use.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser melting and forming processing apparatus, comprising a laser transmission tube (1), characterized in that: The laser transmission tube (1) is fixedly connected to a feeding box (2) on its outer periphery. A connecting hose (3) is provided at the bottom of the feeding box (2). A laser nozzle (8) is detachably connected to the bottom end of the connecting hose (3) via a connecting assembly. A laser groove (9) is provided inside the laser nozzle (8). A powder feeding groove (10) is provided inside the laser nozzle (8). A threaded groove (11) is provided on the outer periphery of the laser nozzle (8). A rotating ring (12) is threadedly connected to the outer periphery of the threaded groove (11). A compression ring (13) is fixedly connected to the bottom of the rotating ring (12). The inner side of the compression ring (13) is in contact with a beveled protrusion (14). A limit groove (15) is opened inside the beveled protrusion (14). A limit block (17) is elastically connected to the inner side of the limit groove (15) through a limit spring (16). A compression cylinder (18) is fixedly connected to the inner side of the limit block (17). A snap-fit ​​assembly is provided on the outer periphery of the laser transmission tube (1). The snap-fit ​​assembly is used to fix the connection hose (3).

2. The laser melting and forming processing apparatus according to claim 1, characterized in that: The connecting assembly includes a fixed ring (4), which is fixedly connected to the bottom outer periphery of the connecting hose (3). A threaded sleeve (5) is fixedly connected to the bottom of the fixed ring (4). A connecting seat (6) is threadedly connected to the outer periphery of the threaded sleeve (5). A sealing ring (7) is placed on the inner wall of the bottom end of the connecting seat (6). The outer periphery of the connecting seat (6) is rotatably connected to the inside of the powder feeding trough (10).

3. The laser melting and forming processing apparatus according to claim 1, characterized in that: The top of the laser nozzle (8) is fixedly connected to the bottom of the laser transmission tube (1), and the top of the laser groove (9) is connected to the inside of the laser transmission tube (1).

4. The laser melting and forming processing apparatus according to claim 1, characterized in that: The powder feeding groove (10) is provided in several groups. The powder feeding groove (10) is distributed equidistantly along the conical surface inside the laser nozzle (8). The axes of the powder feeding groove (10) extend downward and intersect at a point located on the central axis of the laser groove (9).

5. The laser melting and forming processing apparatus according to claim 1, characterized in that: The front cross-section of the rotating ring (12) is inverted L-shaped.

6. The laser melting and forming processing apparatus according to claim 1, characterized in that: The outer side of the inclined protrusion (14) and the inner side of the extrusion ring (13) are both set as inclined surfaces. The outer side of the limiting block (17) is in contact with the inner inclined surface of the extrusion ring (13). The inner inclined surface of the extrusion ring (13) is adapted to the outer inclined surface of the inclined protrusion (14).

7. The laser melting and forming processing apparatus according to claim 1, characterized in that: One end of the limiting spring (16) is fixedly connected to the inner side of the limiting groove (15), and the other end of the limiting spring (16) is fixedly connected to the inner side of the limiting block (17). The outer periphery of the limiting block (17) is slidably connected to the inside of the limiting groove (15).

8. The laser melting and forming processing apparatus according to claim 1, characterized in that: The inner side of the extrusion cylinder (18) is set as an arc surface, and the outer periphery of the extrusion cylinder (18) is slidably connected to the inside of the laser nozzle (8). The inner side of the extrusion cylinder (18) is in contact with the inner wall of the side of the powder feeding trough (10).

9. The laser melting and forming processing apparatus according to claim 1, characterized in that: The snap-fit ​​assembly includes a fixing groove (19), which is formed on the outer periphery of the laser transmission tube (1). A fixing buckle (20) is fixedly connected to the inner wall of the side of the fixing groove (19), and the fixing buckle (20) is snapped into the outer periphery of the connecting hose (3).

10. A laser melting and forming processing apparatus according to claim 2, characterized in that: The outer periphery of the connecting hose (3) is fixedly connected to the inside of the threaded sleeve (5), and the bottom of the threaded sleeve (5) is in contact with the top of the sealing ring (7).

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