Novel wind field structure of additive manufacturing equipment

Abstract

According to the technical scheme, the novel wind field structure of the additive manufacturing equipment is characterized in that the novel wind field structure comprises a barrel-shaped wind bag, the end side of the wind bag is provided with an outwards-extending pipe opening, the outwards-extending pipe opening is connected with an external pipeline, a pipe opening connecting part is arranged on the annular wall of the wind bag, and the pipe opening connecting part is connected with the external pipeline. A rectangular air pipe is installed at the position of the pipe opening connecting part, a grating is installed at the position of the pipe opening connecting part, the external pipeline is a three-way pipeline, one connector of the external pipeline is connected with a main air pipeline, the other connector of the external pipeline is connected with an auxiliary pipeline, and an auxiliary air bag device is fixedly connected to the end of the auxiliary pipeline. The wind field non-uniformity of the forming bin of the closed inert gas protection 3D printing equipment can be effectively improved, and meanwhile the forming bin has the advantages of being small in machining difficulty, low in machining cost, good in consistency and the like.

Description

Technical Field

[0001] This utility model relates to the field of additive manufacturing technology, and in particular to a wind field structure for a novel additive manufacturing equipment. Background Technology

[0002] The airflow device is applied in closed-loop inert gas protected 3D printing technologies such as laser powder bed fusion (LPBF), direct laser metal sintering (DMLS), selective laser sintering (SLS), selective laser melting (SLM), and electron beam melting (EBM). During metal additive manufacturing, a large amount of spatter is generated. Residual oxides on the spatter surface reduce fluid flow within the molten pool and impair the wetting effect of the substrate, inhibiting metal-to-metal fusion and reducing the overall density of the sintered body, thereby diminishing the material's mechanical properties. If spatter deposits on the powder or molten track, subsequent powder spreading cannot be completely covered, resulting in defects such as pores and inclusions.

[0003] Currently, inertial protective airflow is commonly used in engineering to remove splatter during the printing process. According to the requirements of metal additive manufacturing processes, the airflow field of the inertial protective airflow above the printing substrate should be as uniform as possible to meet the requirements of printing consistency. However, due to improper fan selection, unreasonable air intake structure design, and improper ventilation duct layout, the velocity of the inert protective airflow above the printing substrate often exhibits significant non-uniformity, reducing print quality and printing consistency.

[0004] To improve the uniformity of the inertial protective airflow velocity above the printing substrate, existing equipment mostly adopts a flow guiding method to optimize the air intake structure of the molding chamber. However, such structures have poor processing precision, low reproducibility, and cannot be mass-produced, thus having significant limitations. Summary of the Invention

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a new type of wind field structure for additive manufacturing equipment to solve the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A novel wind field structure for additive manufacturing equipment includes an air jacket, which is cylindrical. The air jacket has an extended port on one end, and an external pipe is connected to the extended port. A pipe connection portion is provided on the annular wall of the air jacket, and a rectangular air duct is installed at the pipe connection portion. A grid is installed at the pipe connection portion. The external pipe is a tee pipe, with one interface connected to a main air duct and the other interface connected to an auxiliary pipe. An auxiliary air jacket is fixedly connected to the end of the auxiliary pipe.

[0008] By adopting the above technical solution, this utility model can effectively improve the airflow uniformity of the molding chamber in a closed inert gas protected 3D printing equipment, and has the advantages of low processing difficulty, low processing cost, and good consistency. It can improve the non-uniformity of the inert gas protective airflow velocity above the printing substrate, improve printing quality and printing consistency, and has high reproducibility, which is convenient for mass production. This utility model installs the grid between the rectangular air duct and the external pipe opening. After the airflow passes through the grid, the cross-section will not suddenly increase, which will not easily cause the airflow to diverge and will not destroy the uniformity of the airflow. It increases the local cross-sectional compression ratio near the air bag, and the airflow uniformity of the air bag is better. When this device is used, air can be introduced into the air bag through the main air duct and the auxiliary air bag device through the auxiliary pipe, thereby ensuring the uniformity of the airflow. The device is simpler and easier to produce and assemble.

[0009] Preferably, a first flange is fixed to the end of the pipe connection part, and a second flange is fixed to the end of the rectangular air duct. The first flange and the second flange are fixedly connected by a number of bolts.

[0010] By adopting the above technical solution, the first flange and the second flange can be used to facilitate the connection and fixation of the pipe opening to the rectangular air duct.

[0011] Preferably, the main air duct and the auxiliary air duct each have a corrugated pipe section.

[0012] By adopting the above technical solutions, the corrugated pipe section enables the main air duct and auxiliary duct to adjust their positions, increasing their adaptability.

[0013] Preferably, the external pipe is connected and fixed to the main air pipe, the external pipe outlet, and the auxiliary pipe by a first clamp.

[0014] By adopting the above technical solution, the first clamp can be used for convenient and rapid fixation.

[0015] Preferably, the auxiliary pipe is connected and fixed to the auxiliary air manifold by a second clamp.

[0016] By adopting the above technical solution, the auxiliary pipe and the auxiliary air manifold can be easily fixed using the second clamp.

[0017] Preferably, the outlet end of the auxiliary air manifold is fixed with an extended pipe portion, and the end of the extended pipe portion is fixed with an extended pipe portion.

[0018] By adopting the above technical solutions, the extended tube section and the extended pipe can increase the air blowing distance.

[0019] Preferably, the extended tube section and the elongated tube section are fixedly connected by a flange connecting piece and bolts.

[0020] By adopting the above technical solution, the connection and fixation of the extended tube section and the extended tube section can be quickly achieved using flange connecting plates and bolts.

[0021] Preferably, the extended pipe and the rectangular duct are fixed together on the support plate.

[0022] By adopting the above technical solution, the stability of the device can be improved by using a support plate.

[0023] In summary, the present invention has the following main advantages:

[0024] This invention effectively improves the airflow uniformity in the molding chamber of a closed-loop inert gas protected 3D printing equipment, while also offering advantages such as low processing difficulty, low processing cost, and good consistency. It can improve the uniformity of the inert gas protective airflow velocity above the printing substrate, enhancing printing quality and consistency. It is highly reproducible, facilitating mass production. The invention installs a grille between the rectangular air duct and the external pipe opening, resulting in better airflow uniformity from the air envelope. When using this device, air can be introduced into the air envelope through the main air duct via an external pipe, and into the auxiliary air envelope device through an auxiliary pipe, ensuring uniform airflow. Furthermore, the device is simpler and easier to assemble and manufacture. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of this utility model.

[0026] Figure 2 This is the second structural schematic diagram of this utility model.

[0027] Figure 3 This is the third structural schematic diagram of this utility model.

[0028] Figure 4 This is an exploded schematic diagram of this utility model.

[0029] Reference numerals: 1. Air envelope; 2. Rectangular duct; 3. Grille; 4. Clamp; 5. External pipe; 11. Outlet; 12. Pipe connection; 51. Main duct; 52. Auxiliary duct; 53. Auxiliary air envelope; 121. First flange; 111. Second flange; 511. Corrugated pipe section; 512. First clamp; 521. Second clamp; 54. Outlet; 55. Extended pipe; 541. Flange connection piece; 6. Support plate. Detailed Implementation

[0030] 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. Example

[0031] refer to Figure 1-4 A novel wind field structure for additive manufacturing equipment includes a wind pack 1, which is cylindrical. The wind pack 1 has an extended pipe port 11 at one end, connected to an external pipe 5. A pipe connection portion 12 is provided on the annular wall of the wind pack 1, with a rectangular air duct 2 installed at the pipe connection portion 12 and a grille 3 installed thereon. The external pipe 5 is a tee pipe, with one interface connected to a main air duct 51 and the other connector connected to an auxiliary pipe 52. An auxiliary wind packer 53 is fixedly connected to the end of the auxiliary pipe 52. This invention can effectively improve the closed-loop inert gas protected 3D printing equipment. The device addresses the uneven airflow in the forming chamber, while also offering advantages such as low processing difficulty, low processing cost, and good consistency. It can improve the unevenness of the inertial protective airflow velocity above the printing substrate, thereby enhancing printing quality and consistency. It is highly reproducible and facilitates mass production. This invention installs the grille 3 between the rectangular air duct 2 and the external pipe opening 11, resulting in better airflow uniformity from the air bag 1. When using this device, air can be introduced into the air bag 1 through the main air duct 51 via the external pipe 5, and into the auxiliary air bag device 53 through the auxiliary pipe 52, thus ensuring the uniformity of airflow ejection. Furthermore, the device is simpler and easier to manufacture and assemble.

[0032] refer to Figure 1-4 The pipe connection part 12 has a first flange part 121 fixed to its end, and the rectangular air duct 2 has a second flange part 111 fixed to its end. The first flange part 121 and the second flange part 111 are fixedly connected by several bolts. The first flange part 121 and the second flange part 111 facilitate the connection and fixation between the pipe connection part 12 and the rectangular air duct 2. The main air duct 51 and the auxiliary air duct 52 are each equipped with a corrugated pipe section 511. The corrugated pipe section 511 enables the main air duct 51 and the auxiliary air duct 52 to adjust their positions, increasing their adaptability.

[0033] refer to Figure 1-4The external pipe 5 is connected and fixed to the main air pipe 51, the external outlet 11, and the auxiliary pipe 52 respectively by the first clamp 512, which allows for convenient and quick fixing. The auxiliary pipe 52 is connected and fixed to the auxiliary air manifold 53 by the second clamp 521, which allows for convenient fixing of the auxiliary pipe 52 and the auxiliary air manifold 53.

[0034] refer to Figure 1-4 The auxiliary air manifold 53 has an extended pipe section 54 fixed to its outlet end, and an extended pipe section 55 fixed to the end of the extended pipe section 54. The extended pipe section 54 and the extended pipe section can increase the air blowing distance. The extended pipe section 54 and the extended pipe section 55 are fixedly connected by a flange connecting piece 541 and bolts, which can quickly connect and fix the extended pipe section 54 and the extended pipe section 55. The extended pipe section 54 and the rectangular air duct 2 are jointly fixed on the support plate 6, which can improve the stability of the device.

[0035] 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 novel wind field structure for additive manufacturing equipment, comprising a wind turbine (1), characterized in that: The air bag (1) is cylindrical, and the end of the air bag (1) has an external pipe opening (11). An external pipe (5) is connected to the external pipe opening (11). A pipe connection part (12) is provided on the ring wall of the air bag (1). A rectangular air duct (2) is installed at the pipe connection part (12). A grille (3) is installed at the pipe connection part (12). The external pipe (5) is a three-way pipe. One interface of the external pipe (5) is connected to the main air duct (51). The other joint of the external pipe (5) is connected to the auxiliary pipe (52). An auxiliary air bag device (53) is fixedly connected to the end of the auxiliary pipe (52).

2. The wind field structure of a novel additive manufacturing equipment according to claim 1, characterized in that: The pipe connection part (12) is fixed with a first flange part (121) at the end, and the rectangular air duct (2) is fixed with a second flange part (111) at the end. The first flange part (121) and the second flange part (111) are fixedly connected by a number of bolts.

3. The wind field structure of a novel additive manufacturing equipment according to claim 1, characterized in that: The main air duct (51) and the auxiliary air duct (52) are respectively equipped with corrugated pipe sections (511).

4. The wind field structure of a novel additive manufacturing equipment according to claim 1, characterized in that: The external pipe (5) is connected and fixed to the main air pipe (51), the external pipe outlet (11), and the auxiliary pipe (52) respectively by the first clamp (512).

5. The wind field structure of a novel additive manufacturing equipment according to claim 4, characterized in that: The auxiliary pipe (52) and the auxiliary air manifold (53) are connected and fixed by a second clamp (521).

6. The wind field structure of a novel additive manufacturing equipment according to claim 1, characterized in that: The auxiliary air manifold (53) has an extended pipe (54) fixed at its outlet end, and an extended pipe (55) is fixed at the end of the extended pipe (54).

7. The wind field structure of a novel additive manufacturing equipment according to claim 6, characterized in that: The extended tube section (54) and the extended tube section (55) are fixedly connected by a flange connecting piece (541) and bolts.

8. The wind field structure of a novel additive manufacturing equipment according to claim 7, characterized in that: The extended pipe section (54) and the rectangular air duct (2) are fixed together on the support plate (6).

Images