Multi-stage atomization pulverizing equipment and application method thereof

Abstract

The embodiment of the invention belongs to the technical field of atomization powder making, and relates to multi-stage atomization powder making equipment which is used for conducting multi-stage atomization powder making operation on bars. The rotating electrode powder manufacturing device comprises a rotating electrode powder manufacturing structure and a plurality of rotating discs, and the rotating electrode powder manufacturing structure comprises the bar, an atomizing chamber and a plasma torch arranged in the atomizing chamber. By means of a multi-stage atomization mode combining a rotating disc and a rotating electrode powder manufacturing structure, the advantage that hollow powder and satellite powder are few in the atomization powder manufacturing process of the rotating electrode powder manufacturing structure is exerted, and liquid drops atomized through the rotating electrode powder manufacturing structure are subjected to secondary centrifugal refining in combination with a rotating disc atomization powder manufacturing mode; the rotating disk is arranged on the rotating disk, so that refined liquid drops thrown away from the working surface of the rotating disk are gradually solidified into spherical powder with smaller granularity, the powder does not need to be contacted with a crucible in the powder preparation process, the powder can be ensured to have higher purity, meanwhile, the process difficulty is lower, the process parameter setting is simpler, and large-scale popularization and application are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of atomization powder making, and in particular to a multi-stage atomization powder making device and an application method thereof. Background Art

[0002] Currently, the yield of powders in the 15-53μm particle size range used in 3D printing is relatively low. Common atomization methods for powder production include gas atomization, rotating disk atomization, rotating electrode powder production structure atomization, and ultrasonic atomization. Due to technical limitations, to improve powder yield, multi-stage atomization technology is required to reduce powder particle size. The more common multi-stage atomization methods are a combination of gas atomization and rotating disk atomization, and a combination of rotating electrode powder production structure atomization and ultrasonic atomization. Gas atomization produces hollow powder and satellite powder that are difficult to eliminate, and foreign matter is easily introduced during contact with the crucible. Rotating electrode powder production structure atomization and contact ultrasonic atomization produce a limited variety of powders with suboptimal results. The multi-stage atomization technology combining rotating electrode powder production structure atomization with non-contact ultrasonic atomization has complex process parameter settings and is technically challenging.

[0003] Therefore, the existing technology has defects and needs to be improved. Summary of the Invention

[0004] The present application provides a multi-stage atomization powder making device to solve the problem that the existing multi-stage atomization technology cannot obtain powder with finer particle size and good quality.

[0005] In the first aspect, the present application provides a multi-stage atomization powder making equipment for performing multi-stage atomization powder making operations on rod materials. The multi-stage atomization powder making equipment includes a rotating electrode powder making structure and multiple rotating disks. The rotating electrode powder making structure includes the rod material, an atomization chamber, and a plasma torch arranged in the atomization chamber.

[0006] Optionally, the rotating disk is arranged around the bar.

[0007] Optionally, the atomization chamber is provided with an adjustment component for adjusting the distance between the rotating disk and the rod.

[0008] Optionally, the shape of the working surface of the rotating disk includes but is not limited to one or more of a sawtooth shape, a spherical surface, and a curved surface.

[0009] Optionally, the rotating disk is provided with a vibration device for driving its working surface to vibrate.

[0010] Optionally, the rotating disk is connected to an output end of a motor with adjustable speed.

[0011] Optionally, the plasma torch is arranged opposite to the rod.

[0012] Optionally, a material placement assembly for fixing rod materials is further provided in the atomization chamber.

[0013] On the second aspect, the present application also provides an application method of the above-mentioned multi-stage atomization powder making equipment, comprising the following steps: step S1, installing and debugging the rotation speed of the rod, the distance between the rotating disk and the rod, the rotation speed of the rotating disk, the amplitude of the rotating disk, and the selection of the working surface of the rotating disk according to the material and characteristics of the rod to be atomized; step S2, placing the rod to be atomized on the material placement assembly; and step S3, when starting atomization, first start the rotation and vibration functions of the rotating disk, then start the rotation function of the material placement assembly and the atomization function of the rotating electrode powder making structure to start powder making, until the atomization is completed.

[0014] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0015] 1. By adopting a multi-stage atomization method that combines a rotating disk with a rotating electrode powder making structure, the advantage of the rotating electrode powder making structure that rarely produces hollow powder and satellite powder during atomization powder making is brought into play. In addition, the rotating disk atomization powder making method is combined to perform secondary centrifugal refinement on the droplets atomized by the rotating electrode powder making structure, so that the refined droplets thrown off the working surface of the rotating disk gradually solidify into spherical powder with finer particle size. During the powder making process, there is no need for contact with the crucible, which can ensure that the powder has a high purity. At the same time, the process difficulty is low, and the process parameter setting is relatively simple, which is conducive to large-scale promotion and application.

[0016] 2. By setting the adjustment component, the distance between the rotating disk and the rod can be adaptively adjusted according to the material and characteristics of the rod to improve the atomization effect.

[0017] 3. Each of the rotating disks is connected to the output end of a motor with adjustable speed, and the atomization effect of the rotating disk is improved through the speed adjustment function.

[0018] 4. By adding a vibration function to the rotating disk, the droplets atomized by the rotating electrode powder making structure are further vibrated and refined, while also preventing the droplets from adhering to the rotating disk, so that the rotating disk has a more complex atomization effect.

[0019] 5. By setting up a detachable rotating disk, the shape and size of the rotating disk working surface can be changed and selected to meet the requirements of different centrifugal molten droplets to form fine powder particle size.

[0020] 6. After installing and adjusting the rod and rotating disk, start the rotating disk, and the plasma torch generates a plasma arc. The heat of the plasma arc is transferred to the high-speed rotating rod through the inert gas, and the metal droplets heated to the melting temperature are scattered to the surrounding working surface of the rotating disk. Driven by centrifugal force and the vibration device, the droplets come into contact with the surface of the rotating disk working surface and are forced to be thrown away from the edge of the working surface and gradually solidify to form spherical powder, realizing high-quality multi-stage atomization powder production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 This is a schematic diagram of the partial cross-sectional structure of a multi-stage atomization powder making equipment in working state provided in an embodiment of the present application.

[0025] Figure 2 This is a schematic diagram of the partial cross-sectional structure of a multi-stage atomization powder making equipment in a working state provided in an embodiment of the present application.

[0026] Explanation of the accompanying reference numerals: 1. Multi-stage atomization powder making equipment; 11. Atomization chamber; 12. Rotating disk; 121. Adjustment component; 13. Plasma torch; 2. Rod material; 21. Material placement component. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0029] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0030] In order to solve the technical problems in the prior art, the present application provides a multi-stage atomization powder making device 1, which can solve the problem that the existing multi-stage atomization technology cannot obtain powder with finer particle size and good quality.

[0031] See Figure 1-2 The present application provides a multi-stage atomization powder-making apparatus 1 for performing a multi-stage atomization powder-making operation on a rod 2. The multi-stage atomization powder-making apparatus 1 includes a rotating electrode powder-making structure and a plurality of rotating disks 12. The rotating electrode powder-making structure includes the aforementioned rod 2, an atomization chamber 11, and a plasma torch 13 disposed in the atomization chamber 11. It is understood that the multi-stage atomization method, which combines the rotating disks 12 with the rotating electrode powder-making structure, not only takes advantage of the rotating electrode powder-making structure's advantage of rarely producing hollow powder and satellite powder during atomization powder-making, but also combines the rotating disk 12 atomization powder-making method to perform a secondary centrifugal refinement on the droplets atomized by the rotating electrode powder-making structure, so that the refined droplets ejected from the working surface of the rotating disks 12 gradually solidify into spherical powder with a finer particle size. The powder-making process does not require contact with the crucible, ensuring a high degree of powder purity. Furthermore, the process is relatively simple to set, and the process parameters are relatively simple, facilitating large-scale promotion and application.

[0032] Specifically, see Figure 2 , the rotating disk 12 is arranged around the rod 2; the atomization chamber 11 is provided with an adjustment component 121 for adjusting the distance between the rotating disk 12 and the rod 2. In an embodiment of the present application, four rotating disks 12 are arranged around the rod 2. By providing the adjustment component 121, the distance between the rotating disk 12 and the rod 2 can be adaptively adjusted according to the material and characteristics of the rod 2 to improve the atomization effect. Furthermore, each rotating disk 12 is connected to the output end of a motor with adjustable speed, and the atomization effect of the rotating disk 12 is improved by the speed adjustment function.

[0033] Furthermore, the rotating disk 12 is provided with a vibration device (not shown) that drives its working surface to vibrate. By adding a vibration function to the rotating disk 12, the droplets atomized by the plasma torch 13 are further vibrated and refined, while also preventing the droplets from adhering to the rotating disk 12, thereby providing the rotating disk 12 with a more complex atomization effect.

[0034] Optionally, the working surface of the rotating disk 12 may be shaped, but not limited to, one or more of a serrated, spherical, and arcuate surface. By providing a detachable rotating disk 12, the shape and size of the working surface of the rotating disk 12 can be changed to meet different requirements for forming fine powder particle sizes from centrifugal molten droplets.

[0035] Please continue to see Figure 1 , the atomization chamber 11 is further provided with a material holding assembly 21 for fixing the rod 2; the plasma torch 13 is arranged opposite to the rod 2. It can be understood that the rod 2 fixed to the material holding assembly 21 and rotating in an inert gas environment is heated to the melting temperature by the plasma torch, so that the metal droplets generate spherical powder under the action of centrifugal force. Among them, the higher the rotation speed and the larger the diameter of the rod 2, the smaller the particle size of the powder formed. In the embodiment of the present application, the plasma torch 13 is combined with the multi-stage atomization powder making method of the rotating disk 12 to further ensure the atomization effect of forming a finer particle size powder.

[0036] The present application also provides an application method of the multi-stage atomization powder making equipment, which specifically comprises the following steps:

[0037] Step S1: installing and debugging the rotation speed of the rod, the distance between the rotating disk and the rod, the rotation speed of the rotating disk, the amplitude of the rotating disk, and the selection of the rotating disk working surface according to the material and characteristics of the rod to be atomized;

[0038] Step S2, placing the rod material to be atomized on the material placement assembly;

[0039] And step S3, when atomization starts, first start the rotation and vibration functions of the rotating disk, then start the rotation function of the material placement component and the atomization function of the rotating electrode powder making structure to start powder making, until the atomization is completed.

[0040] It can be understood that by installing and adjusting the rod 2 and the rotating disk 12, the rotating disk 12 is started, so that the high-speed rotating rod 2 will scatter the metal droplets heated to the melting temperature to the surrounding working surfaces of the rotating disk 12 under the action of the plasma torch 13. The droplets are driven by centrifugal force and the vibration device to contact the surface of the working surface of the rotating disk 12 and are forced to be thrown away from the edge of the working surface and gradually solidify to form spherical powder, thereby realizing high-quality multi-stage atomization powder making.

[0041] Compared with the prior art, the multi-stage atomization powder making equipment and the application method thereof provided by the present invention have the following beneficial effects:

[0042] 1. By adopting a multi-stage atomization method that combines a rotating disk with a rotating electrode powder making structure, the advantage of the rotating electrode powder making structure that rarely produces hollow powder and satellite powder during atomization powder making is brought into play. In addition, the rotating disk atomization powder making method is combined to perform secondary centrifugal refinement on the droplets atomized by the rotating electrode powder making structure, so that the refined droplets thrown off the working surface of the rotating disk gradually solidify into spherical powder with finer particle size. During the powder making process, there is no need for contact with the crucible, which can ensure that the powder has a high purity. At the same time, the process difficulty is low, and the process parameter setting is relatively simple, which is conducive to large-scale promotion and application.

[0043] 2. By setting the adjustment component, the distance between the rotating disk and the rod can be adaptively adjusted according to the material and characteristics of the rod to improve the atomization effect.

[0044] 3. Each of the rotating disks is connected to the output end of a motor with adjustable speed, and the atomization effect of the rotating disk is improved through the speed adjustment function.

[0045] 4. By adding a vibration function to the rotating disk, the droplets atomized by the rotating electrode powder making structure are further vibrated and refined, while also preventing the droplets from adhering to the rotating disk, so that the rotating disk has a more complex atomization effect.

[0046] 5. By setting up a detachable rotating disk, the shape and size of the rotating disk working surface can be changed and selected to meet the requirements of different centrifugal molten droplets to form fine powder particle size.

[0047] 6. By installing and adjusting the rod and rotating disk, starting the rotating disk, the rotating electrode powder making structure generates a plasma arc, and the heat of the plasma arc is transferred to the high-speed rotating rod through the inert gas, and the metal droplets heated to the melting temperature are scattered to the surrounding working surfaces of the rotating disk. Driven by centrifugal force and the vibration device, the droplets come into contact with the surface of the rotating disk working surface and are forced to be thrown away from the edge of the working surface and gradually solidify to form spherical powder, realizing high-quality multi-stage atomization powder making.

[0048] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0051] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0052] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0054] Obviously, those skilled in the art may make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, as long as these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

[0055] The above description is a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A multi-stage atomization powder making equipment, used for multi-stage atomization powder making operation of rod material, characterized by: The multi-stage atomization powder making equipment includes a rotating electrode powder making structure and a plurality of rotating disks. The rotating electrode powder making structure includes the rod material, an atomization chamber, and a plasma torch arranged in the atomization chamber.

2. The multi-stage atomization powder making equipment as claimed in claim 1, characterized in that: The rotating disk is arranged around the bar.

3. The multi-stage atomization powder making equipment as claimed in claim 1, characterized in that: The atomization chamber is provided with an adjusting component for adjusting the distance between the rotating disk and the rod.

4. The multi-stage atomization powder making equipment as claimed in claim 1, characterized in that: The shape of the working surface of the rotating disk includes but is not limited to one or more of a sawtooth shape, a spherical surface, and a curved surface.

5. The multi-stage atomization powder making equipment as claimed in claim 1, characterized in that: The rotating disk is provided with a vibration device for driving its working surface to vibrate.

6. The multi-stage atomization powder making equipment as claimed in claim 1, characterized in that: The rotating disk is connected to the output end of a motor with adjustable speed.

7. The multi-stage atomization powder making equipment as claimed in claim 1, characterized in that: The plasma torch is arranged opposite to the rod.

8. The multi-stage atomization powder making equipment as claimed in claim 1, characterized in that: The atomizing chamber is also provided with a material placing assembly for fixing the rod material.

9. A method for using the multi-stage atomization powder making equipment according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1: installing and debugging the rotation speed of the rod, the distance between the rotating disk and the rod, the rotation speed of the rotating disk, the amplitude of the rotating disk, and the selection of the rotating disk working surface according to the material and characteristics of the rod to be atomized; Step S2, placing the rod material to be atomized on the material placement assembly; And step S3, when atomization starts, first start the rotation and vibration functions of the rotating disk, then start the rotation function of the material placement component and the atomization function of the rotating electrode powder making structure to start powder making, until the atomization is completed.

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