Additive manufacturing equipment and purging device thereof
By designing a purge device with Tesla valves and spiral structures in additive manufacturing equipment, the problem of dust and volatiles on the optical lens affecting the quality of sintered workpieces is solved, achieving a more uniform and powerful airflow to remove impurities and improving the quality of the workpiece.
Patent Information
- Application Number
- CN202421638009.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In the existing additive manufacturing technology, dust and volatiles on the optical lens affect the projection power of the laser beam, resulting in poor quality of the sintered workpiece, and uneven air flow of the existing purge mechanism, which cannot effectively remove these impurities.
A purge device for additive manufacturing equipment is designed, using Tesla valves and rotating parts of a spiral structure, so that the air pressure increases significantly after the air flow passes through these parts, thereby forming a uniform air flow, and blowing out dust and volatiles more vigorously through the purge channel.
The uniform air flow significantly improves the purge effect of dust and volatiles on the optical lens, ensures the quality of the sintered workpiece, and solves the quality problems caused by uneven air flow in the prior art.
Smart Images
Figure CN222792790U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of additive manufacturing, and specifically relates to additive manufacturing equipment and a purge device thereof. Background Art
[0002] Additive manufacturing technology is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast, and rich and diverse material types. Since it is not limited by the complexity of the part shape and does not require any tooling, it has a very wide range of applications. Selective Laser Melting (SLM) is one of the additive manufacturing technologies that has developed rapidly in recent years. It uses powder materials as raw materials and uses lasers to scan the cross-section of three-dimensional entities layer by layer to complete prototype manufacturing. Its basic working process is: the powder feeding device delivers a certain amount of powder to the working platform surface, the powder spreading device spreads a layer of powder material on the upper surface of the working chamber pressure plate or the formed part, and the laser galvanometer system controls the laser to scan the solid part powder layer with an approximately constant spot size and beam energy according to the cross-sectional profile of the layer, so that the powder melts and bonds with the formed part below; when a layer of cross section is sintered, the working platform drops a layer of thickness, and the powder spreading device 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.
[0003] Dust and volatiles are generally generated during the molding process of the above-mentioned additive manufacturing technology, so there will be dust and volatiles floating in the molding room. When the laser beam is shot into the optical lens to scan the powder for sintering, the dust and volatiles attached to and floating around the optical lens will reduce the laser projection power and ultimately affect the quality of the sintered workpiece.
[0004] In order to solve the above technical problems, a purge mechanism is generally provided under the above optical lens to purge the dust and volatiles on the optical lens. However, the airflow blown out by the purge mechanism in the prior art is uneven, resulting in turbulence and a narrow purge range, which cannot achieve a good purge effect. Utility Model Content
[0005] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides an additive manufacturing equipment and a purge device thereof, which has not only a simple structure, but also a greatly increased air pressure after the airflow passes through the Tesla valve component and the rotating component of the spiral structure, so that it can be blown out from the purge channel more forcefully, so that a uniform airflow is formed under the optical lens, thereby greatly improving the purge effect of dust and volatiles on the optical lens, and further ensuring the quality of the sintered workpiece.
[0006] In order to achieve the above object, the utility model provides a purge device, which is arranged below the optical lens and includes:
[0007] A working chamber, comprising at least one first component and two second components arranged in parallel and perpendicular to the first component, wherein the first component is connected between the two second components;
[0008] An air inlet is disposed at a top of one of the at least one first component;
[0009] The first Tesla valve structure and the second Tesla valve structure are both disposed in the first component provided with the air inlet and are respectively located at both ends of the air inlet, so that the gas introduced from the outside is blown into the first Tesla valve structure and the second Tesla valve structure respectively through the air inlet;
[0010] A first purge channel and a second purge channel, which are respectively arranged in the two second components, and a first long-shaped air blowing port is provided at the top of the first purge channel, and a second long-shaped air blowing port is provided at the top of the second purge channel;
[0011] The first spiral air channel and the second spiral air channel are both arranged in the working chamber, the first spiral air channel is arranged between the first purge channel and the first Tesla valve structure, and the second spiral air channel is arranged between the second purge channel and the second Tesla valve structure, so that the gas blown into the first Tesla valve structure and the second Tesla valve structure is blown into the first purge channel and the second purge channel through the first spiral air channel and the second spiral air channel respectively, and is blown out through the first blowing port of the first purge channel and the second blowing port of the second purge channel, so as to form a uniform airflow under the optical lens.
[0012] As a further preferred embodiment of the present invention, the purge device is integrally printed by additive manufacturing equipment.
[0013] As a further preferred embodiment of the present invention, the width of the first air blowing port and the second air blowing port is 0.05 mm-0.08 mm.
[0014] As a further preferred solution of the present invention, the working chamber is square or U-shaped.
[0015] As a further preferred solution of the present invention, the air inlet is arranged at the center of the top of the first component.
[0016] As a further preferred embodiment of the present invention, the first spiral air channel and the second spiral air channel are both arranged at the connection position between the first component and the second component.
[0017] As a further preferred solution of the present invention, both the first purge channel and the second purge channel run through the entire second component.
[0018] As a further preferred solution of the present invention, the first air port runs through the entire first purge channel, and the second air port runs through the entire second purge channel.
[0019] The utility model also provides an additive manufacturing device, which includes at least one optical lens and any one of the above-mentioned purging devices, wherein the purging device is arranged below the optical lens.
[0020] The additive manufacturing equipment and the purge device of the utility model include a working chamber, which includes at least one first component and two second components arranged in parallel and perpendicular to the first component, wherein the first component is connected between the two second components; an air inlet is arranged at the top of one of the at least one first component; a first Tesla valve structure and a second Tesla valve structure are both arranged in the first component provided with the air inlet, and are respectively located at the two ends of the air inlet, so that the gas introduced from the outside is respectively blown into the first Tesla valve structure and the second Tesla valve structure through the air inlet; a first purge channel and a second purge channel are respectively arranged in the two second components, and a long strip of first air blowing port is arranged at the top of the first purge channel, and a long strip of second air blowing port is arranged at the top of the second purge channel; a first spiral air channel and a second spiral air channel are both arranged in the working chamber The first spiral air channel is arranged between the first purge channel and the first Tesla valve structure, and the second spiral air channel is arranged between the second purge channel and the second Tesla valve structure, so that the gas blown into the first Tesla valve structure and the second Tesla valve structure is blown into the first purge channel and the second purge channel through the first spiral air channel and the second spiral air channel respectively, and is blown out through the first blowing port of the first purge channel and the second blowing port of the second purge channel, so that a uniform airflow is formed under the optical lens, so that the purge device of the utility model is not only simple in structure; and the air pressure is greatly increased after the air flow passes through the Tesla valve component and the rotating component of the spiral structure, so that it can be blown out from the purge channel more forcefully, so that a uniform airflow is formed under the optical lens, thereby greatly improving the purging effect of dust and volatiles on the optical lens, thereby ensuring the quality of the sintered workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A top view of an embodiment of the purge device provided by the utility model;
[0022] Figure 2 for Figure 1 sectional view of
[0023] Figure 3 for Figure 1 Rear cross-sectional view of
[0024] Figure 4 for Figure 1 A front cross-sectional view of
[0025] Figure 5 A simulation diagram of the working effect of an embodiment of the purge device provided by the utility model.
[0026] The parts in the figure are marked as follows:
[0027] 1. air inlet, 2. first air outlet, 3. first Tesla valve structure, 4. first spiral air channel, 5. first purge channel, 6. second air outlet, 7. second Tesla valve structure, 8. second spiral air channel, 9. second purge channel, 10. first component, 11. second component. DETAILED DESCRIPTION
[0028] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, further detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.
[0029] like Figure 1-Figure 4 As shown, the purge device of this embodiment is arranged below the optical lens and includes:
[0030] A working chamber, comprising at least one first component 10 and two second components 11 arranged in parallel and perpendicular to the first component 10, wherein the first component 10 is connected between the two second components 11;
[0031] An air inlet 1 is provided at the top of one of the at least one first component 10;
[0032] The first Tesla valve structure 3 and the second Tesla valve structure 7 are both disposed in the first component 10 provided with the air inlet 1, and are respectively located at both ends of the air inlet 1, so that the gas introduced from the outside can be blown into the first Tesla valve structure 3 and the second Tesla valve structure 7 respectively through the air inlet 1;
[0033] The first purge channel 5 and the second purge channel 9 are respectively arranged in the two second components 11, and the top of the first purge channel 5 is provided with a long strip of first blowing port 2, and the top of the second purge channel 9 is provided with a long strip of second blowing port 6;
[0034] The first spiral air channel 4 and the second spiral air channel 8 are both arranged in the working chamber, the first spiral air channel 4 is arranged between the first purge channel 5 and the first Tesla valve structure 3, and the second spiral air channel 8 is arranged between the second purge channel 9 and the second Tesla valve structure 7, so that the gas blown into the first Tesla valve structure 3 and the second Tesla valve structure 7 passes through the first spiral air channel 4 and the second spiral air channel 8 and is blown into the first purge channel 5 and the second purge channel 9 respectively, and is blown out through the first air port 2 of the first purge channel 5 and the second air port 6 of the second purge channel 9, so that a uniform airflow is formed under the optical lens.
[0035] Preferably, the purging device is integrally printed by additive manufacturing equipment, which not only ensures accuracy but also has high manufacturing efficiency.
[0036] In order to make the protective gas enter the first air port 2 and the second air port 6 and blow out at high speed in the form of an air flow sheet with a thickness of 0.05 mm, forming a thin high-strength, large air flow impact air curtain, the width of the first air port 2 and the second air port 6 is preferably 0.05 mm-0.08 mm. In a specific implementation, the width of the first air port 2 and the second air port 6 can also be other parameters, such as 0.05 mm-0.3 mm.
[0037] In a specific implementation, the working chamber is square or U-shaped. When the working chamber is square, it includes two first components 10, and the air inlet 1 is only provided on one first component 10; and when the working chamber is U-shaped, it includes one first component 10, and the air inlet 1 is provided on the first component 10. Of course, in a specific implementation, the working chamber can also be other shapes or approximate shapes of square or U-shape.
[0038] Preferably, the air inlet 1 is arranged at the center of the top of the first component 10, which not only facilitates the overall layout of the structure, but also makes the gas blown out through the first air outlet 2 and the second air outlet 6 more symmetrical, thereby making the airflow formed under the optical lens more uniform.
[0039] Further preferably, in order to make the purge device more compact in structure and blow out a more uniform airflow with a wider coverage, the first spiral air channel 4 and the second spiral air channel 8 are both arranged at the connection between the first component 10 and the second component 11. The first purge channel 5 and the second purge channel 9 both run through the entire second component 11; the first air port 2 runs through the entire first purge channel 5, and the second air port 6 runs through the entire second purge channel 9.
[0040] like Figure 5 As shown, in the purging device of this embodiment, the gas introduced from the outside is blown into the first Tesla valve structure 3 and the second Tesla valve structure 7 through the air inlet 1, so that the pressure and speed of the gas are increased. After the increased and accelerated gas enters the first spiral airway 4 and the second spiral airway 8, respectively, the gas produces a directional rotation, thereby forming a high-speed rotating vortex. The vortex airflow is blown into the first purge channel 5 and the second purge channel 9 at a certain angle, and the airflow continues to diffuse in a rotating manner along the channel wall. The rotating airflow passes through the first blowing port 2 of the first purge channel 5 and the second blowing port 6 of the second purge channel 9, and is blown out at an extremely fast speed, thereby achieving a good cleaning effect on the optical lens.
[0041] The utility model also provides an additive manufacturing device, which includes at least one optical lens and a purge device as described in any of the above embodiments, wherein the purge device is arranged below the optical lens. It should be noted that when there are more than one optical lens and the distance between them is relatively far, a purge device of the present application can be arranged below each optical lens.
[0042] The above embodiments are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. It should be pointed out that some modifications and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.
Claims
1. A purge device, characterized in that: It is arranged below the optical lens and includes: A working chamber, comprising at least one first component and two second components arranged in parallel and perpendicular to the first component, wherein the first component is connected between the two second components; An air inlet is disposed at a top of one of the at least one first component; The first Tesla valve structure and the second Tesla valve structure are both disposed in the first component provided with the air inlet and are respectively located at both ends of the air inlet, so that the gas introduced from the outside is blown into the first Tesla valve structure and the second Tesla valve structure respectively through the air inlet; A first purge channel and a second purge channel, which are respectively arranged in the two second components, and a first long-shaped air blowing port is provided at the top of the first purge channel, and a second long-shaped air blowing port is provided at the top of the second purge channel; The first spiral air channel and the second spiral air channel are both arranged in the working chamber, the first spiral air channel is arranged between the first purge channel and the first Tesla valve structure, and the second spiral air channel is arranged between the second purge channel and the second Tesla valve structure, so that the gas blown into the first Tesla valve structure and the second Tesla valve structure is blown into the first purge channel and the second purge channel through the first spiral air channel and the second spiral air channel respectively, and is blown out through the first blowing port of the first purge channel and the second blowing port of the second purge channel, so as to form a uniform airflow under the optical lens.
2. The purging device according to claim 1, characterized in that: The purge device is integrally printed by additive manufacturing equipment.
3. The purging device according to claim 1, characterized in that: The width of the first blowing port and the second blowing port is 0.05 mm-0.08 mm.
4. The purging device according to claim 1, characterized in that: The working chamber is square or U-shaped.
5. The purging device according to claim 1, characterized in that: The air inlet is arranged at the center of the top of the first component.
6. The purging device according to claim 1, characterized in that: The first spiral air channel and the second spiral air channel are both arranged at the connection position of the first component and the second component.
7. The purging device according to claim 1, characterized in that: The first purge channel and the second purge channel both penetrate the entire second component.
8. The purging device according to any one of claims 1 to 7, characterized in that: The first air blowing port runs through the entire first purge channel, and the second air blowing port runs through the entire second purge channel.
9. An additive manufacturing device, characterized in that: It comprises at least one optical lens and the purging device according to any one of claims 1 to 8, wherein the purging device is arranged below the optical lens.