CN209736636U - device for preparing rare metal spherical powder - Google Patents
device for preparing rare metal spherical powder Download PDFInfo
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- CN209736636U CN209736636U CN201920337088.4U CN201920337088U CN209736636U CN 209736636 U CN209736636 U CN 209736636U CN 201920337088 U CN201920337088 U CN 201920337088U CN 209736636 U CN209736636 U CN 209736636U
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Abstract
The utility model discloses a prepare device of rare metal spherical powder relates to powder metallurgy technical field. The method is used for solving the problems of low purity, low sphericity and large particle size in the existing preparation of the spherical rare metal powder. The device includes: the device comprises an atomizing chamber, a rare metal bar, a plasma power supply, a high-speed rotating shaft system and an anode rotating disc; the rare metal bar is arranged at the center of the top of the atomizing chamber and extends into the atomizing chamber, and one end of the rare metal bar, which is positioned outside the atomizing chamber, is electrically connected with a plasma power supply; the high-speed rotating shaft system is arranged at the center of the bottom of the atomizing chamber, the upper end of the high-speed rotating shaft system is connected with the anode rotating disc, and the anode rotating disc and the rare metal bar stock are made of the same material.
Description
Technical Field
the utility model relates to a powder metallurgy technical field, more specifically relate to a prepare spherical powder's of rare metal device.
Background
3D printing is used as a revolutionary novel additive manufacturing technology, and the difficulty restricting the technical development of the technology still lies in the fact that materials, especially metal-based 3D printing powder materials, are basically imported domestically. Since 2015, China paid attention to the development of the 3D printing industry, and formally brings 3D printing into the key direction of national industrial transformation and upgrading. The application and popularization of the 3D printing technology in the metal field are broken through, various metal-based powders meeting the requirements of the 3D printing technology are researched, and the powder manufacturing technology and the complete set of powder manufacturing equipment are the core. High-pressure argon atomization, coaxial jet water-gas combined atomization, plasma rotating electrode atomization, plasma torch atomization, crucible-free electrode induction melting gas atomization and other powder preparation technologies and equipment are the key points for development of metal-based 3D printing powder materials.
at present, the preparation of spherical rare metal powder mainly adopts atomization technology, including gas atomization and centrifugal atomization. The gas atomization powder preparation technology integrates a high vacuum technology, a high temperature smelting technology, a high pressure and high speed technology of gas, and metal powder is obtained by impacting and crushing liquid flow through high speed gas flow. The powder prepared by the method has the characteristics of grain refinement, high fine powder yield, high sphericity and the like, but has the defects of low powder purity, wide particle size distribution range, hollow powder, high non-metal inclusion and the like; the centrifugal atomization method is to throw out and condense the molten liquid drops by means of centrifugal force generated by rotation to obtain spherical powder, and mainly comprises plasma rotating electrode atomization and rotating disc atomization powder preparation technologies. The plasma rotating electrode atomization powder making technology (PREP method) is that the end of a high-speed rotating electrode rod with a certain specification and size is melted into a liquid film under the action of a coaxial plasma arc heating source to form a molten pool, then, under the action of rotating centrifugal force, liquid film melt in the molten pool flows to the edge of the molten pool to be atomized into molten drops, and then the molten drops are cooled and solidified into spherical powder by a gas medium under the action of surface tension in the flying process. The powder prepared by the PREP method has the greatest advantages of clean powder surface, high sphericity, less impurities and no hollow powder. However, the conventional PREP method produces a coarse powder due to the small diameter and low rotation speed of the electrode rod. The rotary disk atomization powder making technology is characterized in that molten rare metal droplets flow to the center of a disk rotating at a high speed through a current-limiting lead-out device, a layer of molten metal film is formed on the rotary disk, and under the action of inertia and centrifugal force, the molten metal film reaches the edge of the rotary disk, is atomized into droplets and is further solidified into metal powder. However, in the technology, molten metal liquid flow is firstly prepared, and at present, the technology mostly adopts induction melting to obtain molten metal, has high energy consumption and is mostly used for preparing low-melting-point metal powder.
In conclusion, the existing preparation of spherical rare metal powder has the problems of low purity, low sphericity and large particle size.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a device of preparation rare metal spherical powder for it is lower to solve current spherical rare metal powder preparation existence purity, and the sphericity is not high and the big problem of particle diameter.
The embodiment of the utility model provides a prepare device of rare metal spherical powder, include: the device comprises an atomizing chamber, a rare metal bar, a plasma power supply, a high-speed rotating shaft system and an anode rotating disc;
the rare metal bar is arranged at the center of the top of the atomizing chamber and extends into the atomizing chamber, and one end of the rare metal bar, which is positioned outside the atomizing chamber, is electrically connected with a plasma power supply;
The high-speed rotating shaft system is arranged at the center of the bottom of the atomizing chamber, the upper end of the high-speed rotating shaft system is connected with the anode rotating disc, and the anode rotating disc and the rare metal bar stock are made of the same material.
Preferably, the device also comprises a guide shaft and a feeding device,
The rare metal bar stock is connected with the feeding device through the guide shaft, and the rare metal bar stock is fed into the atomizing chamber through the feeding device;
The rare metal bar stock is supported and guided by an angular contact bearing at the center inside the guide shaft and is connected with a movable plate on the feeding device through a tensioning sleeve; the feeding device comprises a precise ball screw and 4 linear bearings, the rare metal bar is located at the center of the feeding device, and the ball screw is connected with a servo motor through a synchronous belt and a speed reducer.
Preferably, the atomizing chamber comprises two sides of an inner layer and an outer shell, circulating cooling water is arranged between the inner layer and the outer shell, the temperature of the metal powder is very high due to a large amount of heat generated in the preparation process of the rare metal powder, the purposes of cooling and cooling are achieved through water circulation, and the cooling water can be recycled after being cooled by a water cooling system;
The atomizing chamber is cylindrical with the diameter of 2 m-3 m, the bottom of the atomizing chamber is an inverted cone inner cavity, and the bottom of the inner cavity is made into an inverted cone shape, so that the powder collection is facilitated.
preferably, the diameter of the rare metal bar is 30-50 mm, the length of the rare metal bar is 300-500 mm, one end of the rare metal bar is provided with a conical internal thread, and the other end of the rare metal bar is provided with a conical external thread.
Preferably, the section of the anode rotating disc is a concave spherical disc, so that the flying collision of the molten powder can be avoided, the influence on the sphericity ratio of the powder can be avoided, and the diameter of the anode rotating disc is 60 mm-100 mm.
Preferably, the powder collecting device further comprises a powder receiving opening, a powder collecting barrel and a butterfly valve;
The powder receiving port is arranged at the bottom of the atomizing chamber, the lower end of the powder receiving port is provided with the powder receiving barrel, and the powder receiving port is communicated with the powder receiving barrel through the butterfly valve.
preferably, the device also comprises an inflation valve and a gate valve;
the gas charging valve is arranged at the upper end of the atomizing chamber and communicated with the inert gas bottle through a gas transmission pipe;
the gate valve is arranged on the side wall of the atomizing chamber and communicated with a vacuum system through a vacuum pipeline.
Preferably, the inert gas filled in the inert gas bottle is Ar gas or He gas, and the mass purity of the inert gas is not less than 99.999%.
The embodiment of the utility model provides a prepare device of rare metal spherical powder, the device includes: the device comprises an atomizing chamber, a rare metal bar, a plasma power supply, a high-speed rotating shaft system and an anode rotating disc; the rare metal bar is arranged at the center of the top of the atomizing chamber and extends into the atomizing chamber, and one end of the rare metal bar, which is positioned outside the atomizing chamber, is electrically connected with a plasma power supply; the high-speed rotating shaft system is arranged at the center of the bottom of the atomizing chamber, the upper end of the high-speed rotating shaft system is connected with the anode rotating disc, and the anode rotating disc and the rare metal bar stock are made of the same material. The anode rotating disc and the rare metal bar in the device are made of the same material, so that powder pollution caused by different materials can be avoided, and the quality of metal powder is improved; moreover, plasma arcs emitted by plasmas are used as a heat source for melting rare metal bar materials, the plasmas are high in energy density and utilization rate, and can melt metals and alloys which are refractory from low melting point and high temperature, so that the device can be used for preparing various spherical powder materials and is wide in application range. The embodiment of the utility model provides a device has solved current spherical rare metal powder preparation and has had the purity lower, and the sphericity is not high and the problem that the particle diameter is big.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an apparatus for preparing spherical rare metal powder according to an embodiment of the present invention.
description of reference numerals:
1-atomizing chamber, 2-high-speed rotating shaft system, 3-anode rotating disc, 4-butterfly valve, 5-powder collecting barrel, 6-vacuum system, 7-empty pipeline, 8-gate valve, 9-guide shaft, 10-feeding device, 11-rare metal bar, 12-plasma power supply, 13-inflation valve, 14-gas transmission pipe, 15-inert gas and 16-plasma generator;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
FIG. 1 is a schematic view schematically illustrating an apparatus for preparing spherical rare metal powder according to an embodiment of the present invention,
as shown in figure 1, the device mainly comprises an atomizing chamber, a rare metal bar stock, a plasma power supply, a high-speed rotating shaft system and an anode rotating disc.
Specifically, the rare metal bar is arranged at the center of the top of the atomizing chamber, the rare metal bar extends into the atomizing chamber, a plasma generator arranged in the atomizing chamber is concentric with the rare metal bar, a certain small gap is reserved between the front end of the rare metal bar and the plasma generator, the plasma generator is in contact with the front end of the rare metal bar, and the rare metal bar positioned outside the atomizing chamber is electrically connected with a plasma power supply. It should be noted that the plasma power source is mainly used to supply power to the plasma generator, so that the front end of the rare metal bar can be melted.
Further, the high-speed rotating shaft system is arranged at the center of the bottom of the atomizing chamber, and the upper end of the high-speed rotating shaft system is connected with the anode rotating disc. In the embodiment of the present invention, in order to avoid the contamination caused by different materials, it is preferable that the anode rotating disk and the rare metal bar material are made of the same material.
As shown in fig. 1, the shape of the atomizing chamber provided by the embodiment of the present invention is a cylinder with a diameter between 2m to 3m, and for the convenience of collecting the powder formed in the atomizing chamber, preferably, the bottom of the atomizing chamber is an inverted cone inner cavity, that is, the bottom of the atomizing chamber is inverted cone towards the shape of the inner recess of the atomizing chamber. Further, since a large amount of heat is generated during the preparation of the rare metal powder, the temperature of the metal powder is relatively high, and in order to be able to reduce the temperature in the atomizing chamber, it is preferable that the atomizing chamber is prepared as a double-layered structure including an inner layer and an outer shell, and circulating cooling water is provided between the inner layer and the outer shell. By circulating the cooling water, the temperature in the atomizing chamber can be lowered. It should be noted that the circulating cooling water provided between the inner layer and the outer shell of the atomizing chamber can be recycled after being cooled by the water cooling system, and in the embodiment of the present invention, the specific type of the water cooling system is not limited.
As shown in fig. 1, the apparatus for preparing rare metal spherical powder provided by the embodiment of the present invention further includes a guiding shaft and a feeding device. Specifically, the rare metal bar stock is supported and guided by an angular contact bearing at the center inside the guide shaft, and further connected with a movable plate on the feeding device through a tensioning sleeve, and in practical application, the feeding of the rare metal bar stock can be realized by moving the movable plate.
Furthermore, the feeding device comprises a precision ball screw and 4 linear bearings, the rare metal bar is located at the center of the feeding device, and the ball screw is connected with the servo motor through a synchronous belt and a speed reducer. In practical application, the feeding control of the rare metal bar stock can be realized by controlling the servo motor.
In practical application, the diameter of the rare metal bar is 30 mm-50 mm, and the length of the rare metal bar is 300 mm-500 mm. In order to conveniently connect the two rare metal bar materials, preferably, one end face of each rare metal bar material is provided with a conical internal thread, the other end face of each rare metal bar material is provided with a conical external thread, and the two rare metal bar materials can be conveniently connected together through the internal thread and the external thread.
When the rare metal bar stock starts to melt under the action of the plasma generator, in order to avoid that the molten metal droplets from the front end of the rare metal bar stock can collide with the anode rotating disc rotating at high speed arranged at the lower end of the rare metal bar stock, thereby affecting the sphericity ratio of the metal powder, the section of the anode rotating disc must be a concave spherical disc.
In practical application, before the atomizing chamber starts to work, the atomizing chamber needs to be vacuumized and filled with inert gas. As shown in FIG. 1, the apparatus for preparing spherical powders of rare metals further comprises a gas filling valve and a gate valve. Specifically, the inflation valve is arranged at the upper end of the atomization chamber and communicated with the inert gas bottle through a gas transmission pipe; the gate valve is arranged on the side wall of the atomizing chamber and communicated with the vacuum system through a vacuum pipeline. In practical application, the vacuum system is communicated with the gate valve through the vacuum pipeline, and the gate valve is arranged on the side wall of the atomizing chamber, so that the vacuum system can carry out vacuumizing operation on the atomizing chamber; further, after the atomizer chamber was in the evacuation, need fill inert gas in to the atomizer chamber, specifically, need fill the atomizer chamber with the inert gas that high-purity inert gas is Ar gas or He gas in the inert gas bottle through the inert gas cylinder of gas transmission pipe with atomizer chamber UNICOM, in the embodiment of the utility model provides an in, the high-purity inert gas's in the inert gas mass purity is not less than 99.999%.
After the high-purity inert gas is filled into the atomizing chamber, the rare metal bar stock milling operation is started, and after the rare metal bar stock milling, the powder in the atomizing chamber needs to be taken out from the atomizing chamber. As shown in fig. 1, the device for preparing rare metal spherical powder further comprises a powder receiving port, a powder receiving barrel and a butterfly valve, specifically, the powder receiving port is arranged at the bottom of each of the two sides of the cavity in the atomizing chamber, the powder receiving barrel is arranged at the lower end of the powder receiving port, and the powder receiving port is communicated with the powder receiving barrel through the butterfly valve. Through the setting of above-mentioned butterfly valve, can conveniently receive the change of powder bucket at the powder process in-process. In the embodiment of the utility model, the size of the powder collecting barrel is not limited, and the specific shape of the butterfly valve is not limited.
to sum up, the embodiment of the utility model provides a prepare device of spherical powder of rare metal, the device includes: the device comprises an atomizing chamber, a rare metal bar, a plasma power supply, a high-speed rotating shaft system and an anode rotating disc; the rare metal bar is arranged at the center of the top of the atomizing chamber and extends into the atomizing chamber, and one end of the rare metal bar, which is positioned outside the atomizing chamber, is electrically connected with a plasma power supply; the high-speed rotating shaft system is arranged at the center of the bottom of the atomizing chamber, the upper end of the high-speed rotating shaft system is connected with the anode rotating disc, and the anode rotating disc and the rare metal bar stock are made of the same material. The anode rotating disc and the rare metal bar in the device are made of the same material, so that powder pollution caused by different materials can be avoided, and the quality of metal powder is improved; moreover, plasma arcs emitted by plasmas are used as a heat source for melting rare metal bar materials, the plasmas are high in energy density and utilization rate, and can melt metals and alloys which are refractory from low melting point and high temperature, so that the device can be used for preparing various spherical powder materials and is wide in application range. The embodiment of the utility model provides a device has solved current spherical rare metal powder preparation and has had the purity lower, and the sphericity is not high and the problem that the particle diameter is big.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An apparatus for producing spherical powder of rare metal, comprising: the device comprises an atomizing chamber, a rare metal bar, a plasma power supply, a high-speed rotating shaft system and an anode rotating disc;
The rare metal bar is arranged at the center of the top of the atomizing chamber and extends into the atomizing chamber, and one end of the rare metal bar, which is positioned outside the atomizing chamber, is electrically connected with a plasma power supply;
the high-speed rotating shaft system is arranged at the center of the bottom of the atomizing chamber, the upper end of the high-speed rotating shaft system is connected with the anode rotating disc, and the anode rotating disc and the rare metal bar stock are made of the same material.
2. The device of claim 1, further comprising a guide shaft and a feed device,
The rare metal bar stock is connected with the feeding device through the guide shaft, and the rare metal bar stock is fed into the atomizing chamber through the feeding device;
The rare metal bar stock is supported and guided by an angular contact bearing at the center inside the guide shaft and is connected with a movable plate on the feeding device through a tensioning sleeve;
The feeding device comprises a precise ball screw and 4 linear bearings, the rare metal bar is located at the center of the feeding device, and the ball screw is connected with a servo motor through a synchronous belt and a speed reducer.
3. The apparatus of claim 1, wherein the atomizing chamber comprises an inner layer and an outer shell on both sides thereof, and circulating cooling water is provided between the inner layer and the outer shell;
The atomizing chamber is in a cylindrical shape with the diameter of 2-3 m, and the bottom of the atomizing chamber is in an inverted cone inner cavity.
4. The apparatus of claim 1, wherein the diameter of the rare metal bar is between 30mm and 50mm, the length of the rare metal bar is between 300mm and 500mm, and one end of the rare metal bar is a tapered internal thread and the other end of the rare metal bar is a tapered external thread.
5. the apparatus as claimed in claim 1, wherein the section of the anode rotating disk is a concave spherical disk, and the diameter of the anode rotating disk is 60mm to 100 mm.
6. The device of claim 1, further comprising a powder receiving port, a powder receiving barrel and a butterfly valve;
The powder receiving port is arranged at the bottom of the atomizing chamber, the lower end of the powder receiving port is provided with the powder receiving barrel, and the powder receiving port is communicated with the powder receiving barrel through the butterfly valve.
7. The apparatus of claim 1, further comprising an inflation valve and a gate valve;
The gas charging valve is arranged at the upper end of the atomizing chamber and communicated with the inert gas bottle through a gas transmission pipe;
The gate valve is arranged on the side wall of the atomizing chamber and communicated with a vacuum system through a vacuum pipeline.
8. The apparatus according to claim 7, wherein the inert gas filled in the inert gas bottle is Ar gas or He gas, and the mass purity of the inert gas is not less than 99.999%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920337088.4U CN209736636U (en) | 2019-03-15 | 2019-03-15 | device for preparing rare metal spherical powder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920337088.4U CN209736636U (en) | 2019-03-15 | 2019-03-15 | device for preparing rare metal spherical powder |
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| CN209736636U true CN209736636U (en) | 2019-12-06 |
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| CN201920337088.4U Active CN209736636U (en) | 2019-03-15 | 2019-03-15 | device for preparing rare metal spherical powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109732095A (en) * | 2019-03-15 | 2019-05-10 | 西安赛隆金属材料有限责任公司 | A kind of device preparing rare metal spherical powder |
| CN111778412A (en) * | 2020-07-13 | 2020-10-16 | 苏州金江铜业有限公司 | Centrifugal remelting in-situ solidification device |
-
2019
- 2019-03-15 CN CN201920337088.4U patent/CN209736636U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109732095A (en) * | 2019-03-15 | 2019-05-10 | 西安赛隆金属材料有限责任公司 | A kind of device preparing rare metal spherical powder |
| CN111778412A (en) * | 2020-07-13 | 2020-10-16 | 苏州金江铜业有限公司 | Centrifugal remelting in-situ solidification device |
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Address after: Room 303-46, building a, Kairui, Fengcheng 12th Road, Xi'an Economic and Technological Development Zone, Shaanxi 710018 Patentee after: Xi'an Sailong Additive Technology Co.,Ltd. Address before: 710020 middle section of Jinggao West Road, Jingwei new town new material industrial park, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Patentee before: XI'AN SAILONG METAL MATERIALS Co.,Ltd. |