Efficient powder screening device for metal powder
By designing an efficient powder screening device including a vibrating device and multiple screening chambers, the problems of low screening efficiency and oxidation of metal powders in the prior art are solved, and efficient and safe screening and production of metal powders are achieved.
Patent Information
- Application Number
- CN202421047187.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The existing powder screening equipment for additive manufacturing multiplexed powders is prone to oxidation of powders when sifting metal powders, and the powder screening efficiency is low, increasing production costs.
An efficient powder screening device including a vibrating device and at least two screening chambers is designed. The device enables rapid and efficient screening of multiple metal powders through inclined or vertical feed tubes and arcuate base plates, and prevents powder oxidation through sealed screening chambers and inert gas filling.
The screening efficiency of metal powder is improved, the oxygen content of the powder is reduced, the production cost is reduced, and the production safety and efficiency are improved.
Smart Images
Figure CN222678703U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-efficiency powder screening device for metal powder, belonging to the technical field of additive manufacturing. Background Art
[0002] Additive Manufacturing (AM) is a technology that uses a gradual accumulation of materials to manufacture solid parts. AM technology does not require traditional tools and fixtures and multiple processing steps. It can quickly and accurately manufacture parts of any complex shape on a single device, solving the forming problems of many complex structural parts, and greatly reducing the processing steps and shortening the processing cycle.
[0003] One of the key control factors of additive manufacturing technology is the control of material units, and the screening of additive manufacturing reused powders is an important part of it. However, when screening metal powders, the existing powder screening equipment for additive manufacturing reused powders often directly exposes the metal powders to air, which easily causes the metal powders to oxidize or increase the oxygen content; and the existing powder screening equipment only screens one type of metal powder at a time, with low screening efficiency and increased production costs. Utility Model Content
[0004] The utility model provides a high-efficiency powder screening device for metal powder, which solves the problem of low powder screening efficiency in the prior art.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a high-efficiency powder screening device for metal powder, comprising a vibration device and at least two screening chambers, wherein the vibration device is connected to the screening chamber; the screening chamber comprises a feed pipe, a support frame, a screen, an arc-shaped bottom plate and a discharge port, wherein the arc-shaped bottom plate is fixed to the bottom of the support frame, and a discharge port is provided at the connection between the arc-shaped bottom plate and the support frame; the feed pipe is obliquely or vertically arranged above the screen, and the screen is located below the arc-shaped bottom plate.
[0006] Preferably, the feed pipe includes a first curved portion, a horizontal portion and a second curved portion which are arranged in sequence, the first curved portion is located outside the screening chamber, and the second curved portion is located inside the screening chamber; the bending angle of the first curved portion is 100°, and the angle α between the axis of the horizontal portion and the axis of the powder screening device is 80°, so that the height of the device can be shortened as much as possible while ensuring that the metal powder can smoothly enter the screening chamber, thereby ensuring the screening effect.
[0007] Preferably, centers of the second curved portion of the feed pipe, the screen and the arc-shaped bottom plate are all located on the axis of the powder screening device.
[0008] Preferably, the screening chamber includes a first screening chamber, a second screening chamber and a third screening chamber which are arranged in sequence, and the first screening chamber and the second screening chamber are located below the third screening chamber; the first screening chamber includes a first feed pipe, and the first feed pipe enters the first screening chamber after passing through the second screening chamber; the second screening chamber includes a second feed pipe, and the second feed pipe enters the second screening chamber after passing through the third screening chamber; the third screening chamber includes a third feed pipe, and the third feed pipe is arranged in a vertical direction.
[0009] Preferably, a base is provided at the bottom of the screening chamber; the vibration device comprises a vibrating body and a vibration motor, and the vibrating body and the vibration motor are located in the base; the vibrating body is used to fix the vibration motor and connect the support frame.
[0010] Preferably, the vibration device includes an ultrasonic vibration converter, which is fixed to the outer wall of the support frame. The support frame carries the ultrasonic vibration converter and plays a connecting role with the transducer, so that the ultrasonic vibration wave generated by the transducer acts on the entire screen surface, ensuring the normal screening operation of the ultrasonic vibration screen, thereby achieving the effect of fine screening and net cleaning; the ultrasonic vibration converter and the vibration motor are arranged at the same time, so that the two are superimposed on the screen surface to form a high-frequency and low-amplitude ultrasonic vibration wave. When the powder body approaches the screen surface, it is subjected to ultrasonic acceleration, which can improve the dispersion of the material when passing through the screen.
[0011] Preferably, a shock-absorbing spring is arranged between the machine base and the screening chamber to reduce the vibration force generated by the ultrasonic vibrator on the frame during operation, thereby protecting the long-term stability of the equipment; a rubber shock-absorbing pad is arranged at the bottom of the machine base to adjust the machine base and reduce the vibration force generated by the equipment.
[0012] Preferably, the screen is fixed on the support frame by a screen mounting frame and a clamping ring.
[0013] Preferably, a sealing ring is provided between the screen mounting frame and the clamping ring. The clamping ring tightens and squeezes the sealing ring, the screen and the support frame to form a sealed environment to prevent the oxygen content of the powder in the screen from exceeding the standard; at the same time, the sealing ring can be used to adjust the inclination of the screen and prevent powder leakage and dust.
[0014] Preferably, the screening chamber is provided with an air inlet and an air outlet. The air inlet is used to fill the screening chamber with inert gas, and the air outlet allows excess inert gas to be discharged from the collecting port, which can effectively prevent the oxygen content in the screening chamber from increasing and ensure the quality of the metal powder.
[0015] The powder screening device of the utility model can quickly and effectively screen a variety of different metal powders by providing multiple screening chambers, inclined or vertically arranged feeding pipes and an arc-shaped bottom plate, and the feeding and discharging are rapid, which can increase the screening powder output and thus improve production efficiency.
[0016] The powder screening device of the utility model can effectively prevent the powder from being directly oxidized by contacting with air by sealing the screening chamber and filling it with inert gas, thereby reducing the oxygen content of the powder and avoiding dust generation by workers during operation, thereby ensuring the safety of production. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the structure of a high-efficiency powder screening device for metal powder provided by the utility model;
[0018] Figure 2 A side view of a high-efficiency powder screening device for metal powder provided by the utility model;
[0019] Figure 3 A top view of a high-efficiency powder screening device for metal powder provided by the utility model;
[0020] Figure 4 for Figure 3 Sectional view of the middle GG plane;
[0021] Figure 5 It is a schematic diagram of the structure of the second screening chamber and the third screening chamber in the utility model.
[0022] Among them: 1- base, 101- vibrating body, 102- vibration motor, 103- rubber shock-absorbing pad, 2- first screening chamber, 201- first feed pipe, 202- first discharge port, 3- second screening chamber, 301- second feed pipe, 3011- first bending part, 3012- horizontal part, 3013- second bending part, 302- second discharge port, 4- third screening chamber, 401- third feed pipe, 402- third discharge port, 403- dust cover, 5- support frame, 6- shock-absorbing spring, 7- screen, 8- screen mounting frame, 9- ultrasonic vibration converter, 10- handle, 11- clamp ring, 12- air inlet, 13- air outlet, 14- observation window, 15- sealing ring, 16- arc bottom plate. DETAILED DESCRIPTION
[0023] In order to better understand the essence of the present invention, the present invention is further described below in conjunction with specific embodiments and drawings.
[0024] The utility model is suitable for efficient impurity removal of reused powder in additive manufacturing, and specifically relates to an efficient powder screening device for metal powder, such as Figures 1 to 5As shown, it includes a machine base 1, a vibration device and at least two screening chambers, and the vibration device is connected to the screening chamber. Specifically, the vibration device is installed outside the screening chamber, and the screening chamber is installed above the machine base 1; the screening chamber includes a feed pipe, a support frame 5, a screen 7, a curved bottom plate 16 and a discharge port, the curved bottom plate 16 is fixed at the bottom of the support frame 5, and the screen 7 is located above the curved bottom plate 16; a discharge port is provided at the connection between the curved bottom plate 16 and the support frame 5; the feed pipe is inclined or vertically arranged above the screen 7. The support frame 5 supports the screen 7 and can maintain the flatness of the screen 7. The setting of the curved bottom plate prevents the metal powder from gathering after falling from the screen, and quickly slides down to the discharge port position, thereby improving the screening efficiency.
[0025] In some embodiments of the utility model, the screening chamber includes a second screening chamber 3 and a third screening chamber 4, the second screening chamber 3 is located below the third screening chamber 4; the second screening chamber 3 includes a second feed pipe 301 and a second discharge port 302, and the third screening chamber 4 includes a third feed pipe 401 and a third discharge port 402; the second feed pipe 301 passes through the third screening chamber 4 and the arc bottom plate 16 between the second screening chamber 3 and the third screening chamber 4 and then enters the second screening chamber 3; the third feed pipe 401 is arranged in a vertical direction. The feed pipe of the screening chamber located at the top is arranged vertically, and the feed pipe of the screening chamber below is arranged obliquely, so that the feed barrels do not interfere with each other and the height of the equipment can be effectively shortened.
[0026] In some embodiments of the utility model, the screening chamber includes a first screening chamber 2, a second screening chamber 3 and a third screening chamber 4 which are arranged in sequence, and the first screening chamber 2 and the second screening chamber 3 are located below the third screening chamber 4; the first screening chamber 2 includes a first feed pipe 201 and a first discharge port 202, the second screening chamber 3 includes a second feed pipe 301 and a second discharge port 302, and the third screening chamber 4 includes a third feed pipe 401 and a third discharge port 402; the first feed pipe 201 passes through the second screening chamber 3 and the arc-shaped bottom plate 16 located between the first screening chamber 2 and the second screening chamber 3 and then enters the first screening chamber 2; the second feed pipe 301 passes through the third screening chamber 4 and the arc-shaped bottom plate 16 located between the second screening chamber 3 and the third screening chamber 4 and then enters the second screening chamber 3; the third feed pipe 401 is arranged in a vertical direction.
[0027] In some embodiments of the utility model, the second feed pipe 301 includes a first curved portion 3011, a horizontal portion 3012 and a second curved portion 3013 which are arranged in sequence, the first curved portion 3011 is located outside the second screening chamber 3, and the second curved portion 3013 is located inside the second screening chamber 3; the bending angle of the first curved portion 3011 is 100°, and the angle α between the axis of the horizontal portion 3012 and the axis of the powder screening device is 80°, so that the height of the device can be shortened as much as possible while ensuring that the metal powder can smoothly enter the screening chamber, thereby ensuring the screening effect.
[0028] In some embodiments of the present invention, the centers of the second curved portion of the feed pipe, the screen 7 and the arc-shaped bottom plate 16 are all located on the axis of the powder screening device.
[0029] In some embodiments of the utility model, the vibration device includes a vibrating body 101, a vibration motor 102 and an ultrasonic vibration converter 9, wherein the vibrating body 101 and the vibration motor 102 are located in the machine base 1, and the ultrasonic vibration converter 9 is fixed to the outer wall of the support frame 5; the vibrating body 101 is used to fix the vibration electrode and connect the support frame 5. The machine base 1 is used to fix and support the screening chamber, and the vibrating body 101 and the vibration motor 102 are arranged in the machine base 1 to utilize the space. The support frame 5 carries the ultrasonic vibration converter 9, and plays a connecting role for the transducer, so that the ultrasonic vibration wave generated by the transducer acts on the entire screen surface, ensuring the normal screening operation of the ultrasonic vibration screen, thereby achieving the effect of fine screening and net cleaning.
[0030] In some embodiments of the present invention, the screen 7 is fixed to the support frame 5 through the screen mounting frame 8 and the clamp ring 11. As a preferred embodiment of the present invention, a sealing ring 15 is provided between the screen mounting frame 8 and the clamp ring 11, and the clamp ring fastens and squeezes the sealing ring, the screen and the support frame to form a sealed environment to prevent the oxygen content of the powder in the screen from exceeding the standard; at the same time, the sealing ring can be used to adjust the inclination of the screen and prevent powder leakage and dust.
[0031] In some embodiments of the utility model, a handle 10 is provided on the support frame 5 to facilitate the rapid lifting and installation of each screening chamber; an air inlet 12 and an air outlet 13 are provided on the screening chamber, wherein the air inlet 12 is used to fill the screening chamber with inert gas, and the air outlet 13 allows excess inert gas to be discharged from the collecting port to prevent the oxygen content in the screening chamber from increasing; at the same time, the screening chamber can also be provided with an observation window 14 to facilitate the staff to observe the condition of the material in the screening chamber.
[0032] In some embodiments of the present invention, a dust cover 403 is provided on the top of the third screening chamber 4, so that the third screening chamber 4 forms a sealed environment to prevent external dust and debris from entering.
[0033] In some embodiments of the utility model, the powder screening device is also provided with a shock absorbing assembly, and the shock absorbing assembly includes a rubber shock absorbing pad 103 and a shock absorbing spring 6; the rubber shock absorbing pad 103 is located at the bottom of the machine base 1, and is used to adjust the machine base and reduce the vibration force generated by the equipment; the shock absorbing spring 6 is located between the machine base 1 and the screening chamber, and reduces the vibration force generated by the ultrasonic vibrator on the frame during operation, thereby protecting the long-term stability of the equipment.
[0034] The working principle of this utility model:
[0035] 1. Connect the reused powder barrel to each feed port and replace the air in the screening chamber with inert gas. The air pressure should not be greater than 0.03MPA when replacing the inert gas.
[0036] 2. When the oxygen content in the screening room drops to 300 ppm, the vibration motor 102 and the ultrasonic vibration converter 9 are turned on, and then the valve of the composite powder barrel is opened; the powder is drained onto the screen 7 through each feed pipe, and the screen 7 isolates large metal pieces and metal pieces in pieces to prevent the powder screening machine from being blocked or damaged. The ultrasonic vibration converter 9 and the vibration motor 102 generate a vibration source that is superimposed on the screen surface to form a high-frequency, low-amplitude ultrasonic vibration wave. When the powder body approaches the screen surface, it is subjected to ultrasonic acceleration, which can improve the dispersion of the material when passing through the screen, so that large pieces of metal pieces or metal blocks are isolated on the upper part of the screen 7, and the powder is separated from the screen holes to the lower part of the screen 7. The metal pieces or metal blocks and the powder can be collected separately at the same time.
[0037] 3. After being collected by the arc bottom plate 16, the powder flows out from the discharge port to the receiving barrel.
[0038] During the powder screening process, the condition of the powder in the screening chamber can be known through the observation window 14 . If there is too much powder, the inert gas in the screening chamber needs to be discharged from the gas outlet 13 .
[0039] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other various embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should fall within the scope of protection of the attached claims of the utility model and their equivalents.
Claims
1. An efficient powder screening device for metal powder, characterized in that: The invention comprises a vibration device and at least two screening chambers, wherein the vibration device is connected to the screening chambers; the screening chambers comprise a feed pipe, a support frame (5), a screen (7), an arc-shaped bottom plate (16) and a discharge port, wherein the arc-shaped bottom plate (16) is fixed to the bottom of the support frame (5), and the screen (7) is located above the arc-shaped bottom plate (16); a discharge port is provided at the connection between the arc-shaped bottom plate (16) and the support frame (5); and the feed pipe is arranged obliquely or vertically above the screen (7).
2. The high-efficiency powder screening device according to claim 1, characterized in that: The feed pipe includes a first curved portion, a horizontal portion, and a second curved portion which are arranged in sequence, wherein the first curved portion is located outside the screening chamber, and the second curved portion is located inside the screening chamber; the bending angle of the first curved portion is 100°, and the angle α between the axis of the horizontal portion and the axis of the powder screening device is 80°.
3. The high-efficiency powder screening device according to claim 2 is characterized in that: The centers of the second curved portion of the feed pipe, the screen (7) and the arc-shaped bottom plate (16) are all located on the axis of the powder screening device.
4. The high-efficiency powder screening device according to claim 1 is characterized in that: The screening chamber comprises a first screening chamber (2), a second screening chamber (3) and a third screening chamber (4) which are arranged in sequence, wherein the first screening chamber (2) and the second screening chamber (3) are located below the third screening chamber (4); the first screening chamber (2) comprises a first feed pipe (201), wherein the first feed pipe (201) passes through the second screening chamber (3) and then enters the first screening chamber (2); the second screening chamber (3) comprises a second feed pipe (301), wherein the second feed pipe (301) passes through the third screening chamber (4) and then enters the second screening chamber (3); the third screening chamber (4) comprises a third feed pipe (401), wherein the third feed pipe (401) is arranged in a vertical direction.
5. The high-efficiency powder screening device according to claim 1 is characterized in that: A base (1) is provided at the bottom of the screening chamber; the vibration device comprises a vibrating body (101) and a vibration motor (102), the vibrating body (101) and the vibration motor (102) being located inside the base (1); the vibrating body (101) is used to fix the vibration motor and is connected to a support frame (5).
6. The high-efficiency powder screening device according to claim 5, characterized in that: The vibration device comprises an ultrasonic vibration converter (9), and the ultrasonic vibration converter (9) is fixed to the outer wall of the support frame (5).
7. The high-efficiency powder screening device according to claim 5, characterized in that: A shock absorbing spring (6) is arranged between the machine base (1) and the screening chamber; and a rubber shock absorbing pad (103) is arranged at the bottom of the machine base (1).
8. The high-efficiency powder screening device according to claim 1, characterized in that: The screen (7) is fixed on the support frame (5) via a screen mounting frame (8) and a clamping ring (11).
9. The high-efficiency powder screening device according to claim 8, characterized in that: A sealing ring (15) is provided between the screen mounting frame (8) and the clamping ring (11).
10. The high-efficiency powder screening device according to claim 1, characterized in that: The screening chamber is provided with an air inlet (12) and an air outlet (13), wherein the air inlet (12) is used to fill the screening chamber with inert gas, and the air outlet (13) allows excess inert gas to be discharged from the collecting port.