Air port honeycomb guide plate structure and device suitable for uniform distribution of wind field of large-breadth metal additive equipment

Abstract

The invention discloses a tuyere honeycomb guide plate structure and device suitable for uniform distribution of a wind field of large-breadth metal additive equipment, and relates to the technical field of metal 3D printing. The tuyere honeycomb flow guide plate structure comprises a tuyere honeycomb flow guide plate structure body, a third jet flow channel is arranged in the tuyere honeycomb flow guide plate structure body, the third jet flow channel is of a gradient caliber, and the third jet flow channel comprises a first jet flow channel, a fourth jet flow channel and a second jet flow channel. An air inlet is formed in the side end, close to one side, of the tuyere honeycomb guide plate structure body; air flow is introduced into the air blowing structure and rectified through the air opening honeycomb flow guide plate structures evenly distributed in the air field of the large-breadth metal additive equipment, air flow parallel to the front is obtained, the air suction structure sucks air after being externally connected with the draught fan, the air flow on the forming plane shows the uniform flow speed and the high average air flow strength, and the air flow in the forming plane is uniform in flow speed and high in average air flow strength. In this way, smoke dust at all positions in the machining process can be effectively removed.

Description

Technical Field

[0001] The present invention relates to the technical field of metal 3D printing, and in particular to a tuyere honeycomb guide plate structure and device suitable for uniformly distributing the wind field of large-format metal additive equipment. Background Art

[0002] Metal additive manufacturing equipment, especially Selective Laser Melting (SLM) equipment, is often accompanied by the generation of spatter and smoke during the process of printing parts. Among them, spatter greatly affects the molding quality of the printed parts, and smoke will block the laser lens and directly affect the stability of the printing process. Therefore, when designing SLM equipment, a circulating airflow module (wind field structure) will be introduced, and symmetrically distributed air outlets and air suction ports will be designed in the molding chamber, so that the protective gas can flow in the molding chamber and take away the spatter and smoke generated;

[0003] As the metal additive manufacturing market continues to expand, the production efficiency and molding size of small-format SLM equipment can no longer meet market demand, while large-format (printing area 400×400mm) 2 (above) It is difficult to form a stable protective airflow in the molding cabin of the SLM equipment. At present, in order to form a stable airflow field, large-format SLM equipment has done a lot of research and development on the wind source and internal structure of the wind field structure, including the design of multiple wind source pipelines to suppress the backflow in the molding cabin, and the design of the rectifying flow channel of the blowing and suction structure to obtain the airflow in the molding cabin parallel to the printing format. However, SLM equipment with different molding format sizes, different galvanometer and other component layouts often need to redesign the wind field structure, which greatly increases the research and development cost of the equipment. At the same time, the rectifying flow channel design of the blowing structure is difficult to ensure the balance of wind speed uniformity and airflow intensity at the blowing port. Therefore, the development of a guide structure that can be widely used in the blowing port of various large-format metal additive equipment is of great significance to improving printing quality and accelerating the research and development of equipment. In response to the above problems, the inventor proposes a honeycomb guide plate structure and device for the air outlet with uniform distribution of the wind field of large-format metal additive equipment to solve the above problems. Summary of the invention

[0004] In order to solve the problems of uneven wind speed and insufficient airflow intensity on the air outlet side of various wind field structures of large-format metal additive equipment; the purpose of the present invention is to provide an air outlet honeycomb guide plate structure and device suitable for uniform distribution of the wind field of large-format metal additive equipment.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a tuyere honeycomb guide plate structure suitable for uniformly distributing the wind field of large-format metal additive equipment, comprising a tuyere honeycomb guide plate structure body, wherein a jet channel three is arranged in the tuyere honeycomb guide plate structure body, and the jet channel three has a gradient aperture, and the jet channel three comprises three types of jet channels, namely, jet channel one, jet channel four and jet channel two.

[0006] Preferably, an air inlet is provided at a side end of the tuyere honeycomb guide plate structure body and close to one side, and an air inlet outlet is provided at a side end of the tuyere honeycomb guide plate structure body and close to the molding cabin.

[0007] A device used for an air outlet honeycomb guide plate structure suitable for uniformly distributing the wind field of large-format metal additive equipment includes a molding cavity, characterized in that a molding plane is provided at the bottom end of the interior of the molding cavity, an air suction port is provided at the side end of the molding cavity, a blowing port is provided at the side of the molding cavity away from the air suction port, a blowing structure is provided at the side end of the molding cavity and located at the main body of the air outlet honeycomb guide plate structure, and an air suction structure is provided at the other side end of the molding cavity and located at the air suction port.

[0008] Preferably, the air outlet honeycomb guide plate structure body is fixed inside the air outlet.

[0009] Preferably, an air outlet 1 is provided at one end of the air suction structure away from the molding cavity, and can be connected to an external fan.

[0010] Preferably, an air flow inlet is provided at one end of the blowing structure away from the molding cavity, and can be connected to an external fan.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The airflow in the blowing structure of the present invention can be sprayed into the molding chamber at a high speed in a laminar state through the hexagonal jet channel, and the airflow is limited to be sprayed into the molding chamber in a direction parallel to the printing format; in addition, the airflow on one side of the air outlet in the blowing structure often shows that the airflow pressure on both sides of the air outlet is larger and the airflow pressure on the lower side is smaller due to the wall resistance and turbulence tendency; therefore, the lower side of the honeycomb guide plate structure has a large hexagonal channel cross-sectional diameter from the air outlet of the blowing structure to the small hexagonal channel cross-sectional diameter in the molding chamber, and the diameter along the channel direction The jet channels are composed of jet channels with continuously changing sizes. This type of jet channel can increase the flow rate of the jet under the minimum pressure loss. The jet channels on the left and right sides of the honeycomb guide plate structure are composed of small hexagonal channels facing the air outlet and large hexagonal channels facing the molding chamber. They can reduce the air flow entering the channels on the left and right sides and increase the air flow at other channels. This helps to balance the air flow entering all channels and improve the wind speed uniformity and airflow intensity of the printing format. The diameters of the remaining jet channels are consistent from the air outlet to the molding chamber.

[0013] 2. In the present invention, the airflow is introduced into the blowing structure, and is rectified by the honeycomb guide plate structure of the air outlet with uniform distribution in the wind field of the large-scale metal additive equipment to obtain the airflow parallel to the front. The suction structure is connected to the fan externally to suck air. The airflow on the forming plane presents a uniform flow velocity and a high average airflow intensity, which helps to effectively remove smoke and dust at various positions during the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a perspective structural schematic diagram of the tuyere honeycomb guide plate structure of the present invention.

[0016] Figure 2 It is a front view structural schematic diagram of the tuyere honeycomb guide plate structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the rear view structure of the tuyere honeycomb guide plate structure of the present invention.

[0018] Figure 4 It is a schematic structural diagram of a longitudinal cross-sectional view of the tuyere honeycomb guide plate structure of the present invention.

[0019] Figure 5 It is a perspective structural schematic diagram of the device of the present invention.

[0020] Figure 6 It is a schematic structural diagram of a perspective view of the device of the present invention from another viewing angle.

[0021] Figure 7 It is a structural schematic diagram of a top view of the device of the present invention.

[0022] Figure 8 It is a schematic diagram of the longitudinal cross-sectional structure of the device of the present invention.

[0023] In the figure: 10, air outlet honeycomb guide plate structure body; 20, air inlet; 21, jet channel one; 22, jet channel four; 30, air inlet outlet; 31, jet channel two; 41, jet channel three; 50, molding cavity; 60, blowing structure; 61, suction structure; 70, air flow inlet; 71, molding plane; 80, suction port; 81, blowing port. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example: Figure 1-8 As shown, the present invention provides a technical solution: a tuyere honeycomb guide plate structure suitable for uniformly distributing the wind field of a large-scale metal additive equipment, comprising a tuyere honeycomb guide plate structure body 10, a jet channel three 41 is arranged in the tuyere honeycomb guide plate structure body 10, and the jet channel three 41 has a gradient caliber, and the jet channel three 41 includes three types of jet channels, namely, a jet channel one 21, a jet channel four 22 and a jet channel two 31, wherein the tuyere honeycomb guide plate structure body 10 is uniformly distributed, and the jet channel three 41 has a gradient caliber from the front to the back of the tuyere honeycomb guide plate structure body 10. The jet channel 1 21 whose diameter changes from large to small, the jet channel 4 22 whose diameter does not change, and the jet channel 2 31 whose diameter changes from small to large, the air inlet 20 are for airflow to flow in. When in use, the protective gas blowing structure 60 is connected to the protective gas airflow, and after being applied to the device, the airflow inlet 70 can be connected to the protective gas inflow pipe, and the airflow flows in the airflow pipe in the blowing structure 60. The air outlet of the blowing structure 60 and the airflow inlet 70 are connected by clearance fit, and the fitting clearance is greater than 0.01mm. The blowing structure 60 can be quickly disassembled and assembled through the clearance fit connection.

[0026] An air inlet 20 is provided at a side end of the tuyere honeycomb guide plate structure body 10 and close to one side, and an air inlet outlet 30 is provided at a side end of the tuyere honeycomb guide plate structure body 10 and close to the molding cabin.

[0027] By adopting the above-mentioned technical solution, the central airflow directions of all jet channels are consistent, so that a uniform airflow parallel to the front can be obtained on the molding plane 71. The thickness of the thin wall formed by adjacent jet openings on the air inlet outlet 30 is not greater than 2 mm. The purpose is to prevent obvious gaps from appearing between the jets of adjacent channel openings, thereby preventing obvious striped airflow from appearing on the molding plane 71.

[0028] A device used in an air outlet honeycomb guide plate structure suitable for uniformly distributing the wind field of large-scale metal additive equipment includes a molding cavity 50, a molding plane 71 is provided at the bottom end of the molding cavity 50, a suction port 80 is opened at the side end of the molding cavity 50, a blowing port 81 is opened on the side of the molding cavity 50 away from the suction port 80, a blowing structure 60 is provided at the side end of the molding cavity 50 and located at the air outlet honeycomb guide plate structure body 10, and a suction structure 61 is provided at the other side end of the molding cavity 50 and located at the suction port 80.

[0029] The air outlet honeycomb guide plate structure body 10 is fixed inside the air outlet 81 .

[0030] By adopting the above technical solution, the blowing port 81 is provided to cooperate with the suction port 80 so that the airflow between the two is parallel to the forming plane 71.

[0031] An air outlet 1 is formed at one end of the air suction structure 61 away from the molding cavity 50 , and can be connected to an external fan.

[0032] By adopting the above technical solution, an air outlet 1 is provided at the side end of the air suction structure 61 in order to achieve the effect of air inlet and outlet.

[0033] An air inlet 70 is provided at one end of the blowing structure 60 away from the molding cavity 50 , and can be connected to an external fan.

[0034] By adopting the above technical solution, the air flow flows in from the blowing port 81 , flows over the molding plane 71 , and flows out through the suction port 80 .

[0035] Working principle: In the present invention, the protective gas passes through the air flow inlet 70 and the blowing structure 60 into the air outlet honeycomb guide plate structure body 10 with uniform distribution of the wind field of the large-scale additive manufacturing equipment, wherein the air flow enters the jet channel three 41 with different gradient calibers. Since the jet channel three 41 contains jet channels with different gradient calibers, the pressure-uneven airflow entering from the air inlet 20 is rectified into a jet with relatively uniform pressure, thereby obtaining a parallel forward uniform jet at the air inlet outlet 30; finally, a protective airflow with uniform flow rate and velocity can be obtained at each position of the molding plane 71; subsequently, the suction structure 61 is connected to an external fan for suction, so that an airflow parallel to the molding plane can be obtained between the blowing port 81 and the suction port 80.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A tuyere honeycomb guide plate structure suitable for uniformly distributing the wind field of a large-scale metal additive equipment, comprising a tuyere honeycomb guide plate structure body (10), characterized in that: The tuyere honeycomb guide plate structure body (10) is provided with a jet channel three (41), and the jet channel three (41) has a gradient caliber. The jet channel three (41) includes three types of jet channels, namely, jet channel one (21), jet channel four (22) and jet channel two (31).

2. The honeycomb guide plate structure for air outlets suitable for uniform distribution of wind field of large-scale metal additive equipment according to claim 1, characterized in that: An air inlet (20) is provided at the side end of the tuyere honeycomb guide plate structure body (10) and close to one side, and an air inlet outlet (30) is provided at the side end of the tuyere honeycomb guide plate structure body (10) and close to the molding cabin.

3. A device used in a honeycomb guide plate structure for a large-format metal additive equipment for uniformly distributing the wind field as described in claims 1-2, comprising a molding cavity (50), characterized in that: A molding plane (71) is provided at the bottom end of the molding cavity (50), a suction port (80) is provided at the side end of the molding cavity (50), a blowing port (81) is provided at the side of the molding cavity (50) away from the suction port (80), a blowing structure (60) is provided at the side end of the molding cavity (50) and located at the air port honeycomb guide plate structure body (10), and a suction structure (61) is provided at the other side end of the molding cavity (50) and located at the suction port (80).

4. The device used in the honeycomb guide plate structure of the air outlet suitable for uniform distribution of the wind field of large-scale metal additive equipment as claimed in claim 3, characterized in that: The air outlet honeycomb guide plate structure body (10) is fixed inside the air outlet (81).

5. The device used in the honeycomb guide plate structure of the air outlet suitable for uniform distribution of the wind field of large-scale metal additive equipment as claimed in claim 3, characterized in that: The air suction structure (61) is provided with an air outlet 1 at one end of the side away from the molding cavity (50), which can be connected to an external fan.

6. The device used in the air outlet honeycomb guide plate structure suitable for uniformly distributing the wind field of large-scale metal additive equipment as claimed in claim 3, characterized in that: The blowing structure (60) is provided with an air flow inlet (70) at one end away from the molding cavity (50), and can be connected to an external fan.

Images