CN116984619A - Centrifugal atomizer and use method thereof - Google Patents
Centrifugal atomizer and use method thereof Download PDFInfo
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- CN116984619A CN116984619A CN202311275629.2A CN202311275629A CN116984619A CN 116984619 A CN116984619 A CN 116984619A CN 202311275629 A CN202311275629 A CN 202311275629A CN 116984619 A CN116984619 A CN 116984619A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 94
- 239000000956 alloy Substances 0.000 claims abstract description 94
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000000889 atomisation Methods 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 10
- 239000010439 graphite Substances 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims description 33
- 230000008569 process Effects 0.000 claims description 21
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- 230000001965 increasing effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000654 additive Substances 0.000 abstract description 4
- 230000000996 additive effect Effects 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000000155 melt Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 238000009690 centrifugal atomisation Methods 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
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- 239000002994 raw material Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
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- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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Abstract
The application relates to the technical field of additive manufacturing, in particular to a centrifugal atomizer and a use method, wherein a working electrode is moved above a centrifugal turntable through a moving device, so that the working electrode stretches into an alloy melt liquid film and has a gap with the surface of the centrifugal turntable, then the working electrode is kept fixed, an external power supply is started, a complete loop is formed by a graphite electrode, the alloy melt and the external power supply, the alloy melt can be charged, the surface tension of the alloy melt is further reduced, and as the centrifugal turntable rotates relative to the working electrode, the working electrode can damage an oxide film possibly existing on the surface of the alloy melt liquid film, and the fluctuation level of the alloy melt liquid film can be increased, so that the atomization effect is better.
Description
Technical Field
The application relates to the technical field of additive manufacturing, in particular to a centrifugal atomizer and a using method thereof.
Background
In the process of producing metal powder by using a centrifugal atomizer, metal melt firstly flows into the surface of a rotary table to form a layer of liquid film, and then the metal melt is crushed at the edge of the rotary table to form atomized droplets, wherein the particle size of the atomized droplets is reduced by enhancing the fluctuation of the metal melt on the rotary table and reducing the surface tension of the metal melt, and particularly when the rotary table centrifugal atomization process is used for producing metal powder raw materials in additive manufacturing, the high-temperature alloy melt has high temperature, and a plurality of alloy melts or certain components have corrosiveness to metal materials, such as aluminum alloy, titanium alloy and the like, so that most of metal materials cannot be adopted as the rotary table for centrifugal atomization operation. Therefore, when the centrifugal atomization process of the turntable is used for centrifugal atomization operation of corrosive high-temperature metal melts such as aluminum alloy, titanium alloy and the like, in order to prevent the turntable material from polluting the alloy melt and cracking the turntable body, the centrifugal turntable is usually prepared from graphite or ceramic materials; the turntable in the prior art CN112620642a is electrified, if the turntable is used for producing aluminum alloy and titanium alloy powder, the turntable can be prepared by using graphite, but the structural strength is lower and the turntable is fragile, electrode brushes or wires are needed to be directly contacted with the turntable, a closed loop through which current can not pass can not be formed without contact, but the turntable is rotated at a super-high speed, the turntable is easy to be unbalanced and easy to generate large-amplitude vibration and even is directly crushed once the electrode brushes are contacted with a turntable body or a driver, and the scheme of the comparison document can reduce the tension of the surface of a metal melt to a certain extent, but can not strengthen the fluctuation of the metal melt on the turntable, and can not damage an oxide layer on the surface of the metal melt which possibly exists, so that the atomization effect is poor.
In view of the above problems, no effective technical solution is currently available.
Disclosure of Invention
The application aims to provide a centrifugal atomizer and a use method thereof, which can effectively reduce the surface tension of a melt, enhance the fluctuation level of an alloy melt liquid film on a centrifugal turntable, and damage an oxidation layer possibly existing on the surface of the alloy melt.
The application provides a centrifugal atomizer, which comprises an atomizing chamber, a centrifugal turntable, a driving device, at least two working electrodes, a moving device and an external power supply, wherein the centrifugal turntable is arranged on the centrifugal turntable; the centrifugal turntable, the driving device, the working electrode and the moving device are arranged in the atomization chamber;
the centrifugal turntable is connected with the driving device, the driving device is used for driving the centrifugal turntable to rotate, and the centrifugal turntable is used for driving the alloy melt flowing onto the centrifugal turntable to perform centrifugal movement so as to atomize;
each working electrode is respectively fixed on the moving device and uniformly arranged at intervals around the central axis of the centrifugal turntable, the moving device is used for moving the working electrode to the upper part of the centrifugal turntable so that the working electrode stretches into the alloy melt and has a gap with the surface of the centrifugal turntable, the positive electrode of the external power supply is arranged above the centrifugal turntable and is used for being connected with the alloy melt, and the negative electrode of the external power supply is connected with the working electrode.
Through the arrangement, the application can effectively reduce the surface tension of the melt, enhance the fluctuation level of the alloy melt on the centrifugal turntable, and damage the possible oxide layer on the surface of the alloy melt.
Optionally, the working electrode has a first distance from a central axis of the centrifugal turntable, the first distance satisfying the following relationship:
；
in the method, in the process of the application,and R is the radius of the centrifugal turntable for the first distance.
Through setting up first distance, make the work electrode can strengthen the fluctuation level of alloy melt liquid film, can also directly destroy alloy melt liquid film surface's oxide film to make atomization effect better.
Optionally, the gap satisfies the following relationship:
；
in the method, in the process of the application,for the height of the gap, +.>The first thickness is the thickness of the alloy melt at a first distance of the working electrode relative to a central axis of the centrifugal turntable.
Through setting up the clearance, can guarantee the safe distance of working electrode and centrifugal carousel, avoid working electrode and centrifugal carousel to bump etc. unexpected.
Optionally, the first thickness is calculated according to the following formula:
；
in the method, in the process of the application,q is the flow rate of the alloy melt flowing into the centrifugal turntable per unit time for the density of the alloy melt, +.>For the dynamic viscosity of the alloy melt, +.>For the angular velocity of the centrifugal rotor, +.>Is the circumference ratio.
Optionally, the mobile device includes servo motor, fixed establishment, feeding mechanism and fixture, fixed establishment with the roof of atomising chamber is connected, servo motor with feeding mechanism articulates on the fixed establishment, fixture sets up feeding mechanism's output, fixture is last be provided with the chuck of working electrode one-to-one, the chuck is used for the centre gripping working electrode, servo motor is used for the drive feeding mechanism moves in order to drive on the chuck working electrode is close to or keeps away from centrifugal carousel.
Optionally, the working electrode is a graphite electrode.
Optionally, an annular groove is arranged on the centrifugal turntable, an opening of the annular groove faces the working electrode, and the depth of the annular groove is not more than 0.5mm and less than 5% of the thickness of the centrifugal turntable.
Optionally, the width of the working electrode is not more than 3mm, the width of the annular groove is at least 2mm greater than the width of the working electrode, and the width of the annular groove is 2.5mm-6mm.
Optionally, the end of the working electrode is leveled with the upper surface of the centrifugal turntable.
In a second aspect, the present application provides a method of using a centrifugal atomizer, the method of using comprising:
s1, starting the driving device to enable the rotating speed of the centrifugal turntable to reach the atomizing process requirement;
s2, moving the working electrode to a designated position in the alloy melt through the moving device;
s3, pouring the alloy melt into the centrifugal turntable;
s4, turning on an external power supply;
s5, turning off an external power supply after atomization is finished, moving the working electrode away from the centrifugal turntable through the moving device, and turning off the driving device.
The beneficial effects are that: according to the centrifugal atomizer and the use method, the working electrode is moved to the upper side of the centrifugal turntable through the moving device, so that the working electrode stretches into the alloy melt liquid film and has a gap with the surface of the centrifugal turntable, then the working electrode is kept fixed, an external power supply is started, a complete loop is formed by the graphite electrode, the alloy melt and the external power supply, the alloy melt can be charged, the surface tension of the alloy melt is further reduced, and as the centrifugal turntable rotates relative to the working electrode, the working electrode can damage an oxide film possibly existing on the surface of the alloy melt liquid film, and the fluctuation level of the alloy melt liquid film can be increased, so that the atomization effect is better.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a centrifugal atomizer provided by the application.
Fig. 2 is a schematic view of a partial structure of a centrifugal atomizer according to the present application.
Fig. 3 is a schematic diagram of the positional relationship between the annular groove and the working electrode provided by the application.
Fig. 4 is a schematic flow chart of a method for using the centrifugal atomizer provided by the application.
Description of the reference numerals: 11. a centrifugal turntable; 12. a driving device; 13. a working electrode; 14. an external power source; 15. alloy melt; 16. a gap; 21. a servo motor; 22. a fixing mechanism; 23. a feeding mechanism; 24. a clamping mechanism; 31. an annular groove.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-4, fig. 1 is a schematic diagram of an overall structure of a centrifugal atomizer according to an embodiment of the present application, which effectively reduces the surface tension of an alloy melt 15, and enhances the fluctuation level of a liquid film of the alloy melt 15 on a centrifugal turntable, so as to damage an oxide layer possibly existing on the surface of the alloy melt 15.
The application provides a centrifugal atomizer, which comprises an atomizing chamber, a centrifugal turntable 11, a driving device 12, at least two working electrodes 13, a moving device and an external power supply 14, wherein the centrifugal turntable is arranged on the centrifugal turntable; the centrifugal turntable 11, the driving device 12, the working electrode 13 and the moving device are arranged in the atomization chamber;
the centrifugal turntable 11 is connected with a driving device 12, the driving device 12 is used for driving the centrifugal turntable 11 to rotate, and the centrifugal turntable 11 is used for driving the alloy melt 15 flowing onto the centrifugal turntable 11 to perform centrifugal motion so as to atomize;
the working electrodes 13 are respectively fixed on a moving device and are uniformly arranged at intervals around the central axis of the centrifugal turntable 11, the moving device is used for moving the working electrodes 13 above the centrifugal turntable 11, so that the working electrodes 13 extend into the alloy melt 15 and have a gap 16 with the surface of the centrifugal turntable 11, the positive electrode of an external power supply 14 is arranged above the centrifugal turntable 11 and is used for being connected with the alloy melt 15, and the negative electrode of the external power supply 14 is connected with the working electrodes 13.
The external power supply 14 is a dc power supply, and the voltage of the dc power supply does not exceed the pressure-bearing limit of the human body, so as to prevent injury to personnel, and the specific voltage can be determined according to the alloy type, and is not particularly limited herein; in addition, the external power source 14 is connected to the alloy melt 15 by: one is to put the positive pole of the external power supply 14 directly in the alloy melt 15, such as in the tundish or the alloy melt 15 in the flow guide pipe, and the other is that the flow guide pipe is made of graphite material, and the positive pole of the external power supply 14 can be connected to the flow guide pipe to charge the alloy melt 15 in direct contact with the flow guide pipe; in the application, the number of the working electrodes 13 is preferably two, the two working electrodes 13 are uniformly arranged at intervals around the central axis of the centrifugal turntable 11, so that the electric field formed in the alloy melt 15 is more uniform, and the specific number of the working electrodes 13 can be set according to actual needs; the driving device 12 is of the prior art, and is not particularly limited herein.
Specifically, as shown in fig. 1, after the centrifugal turntable 11 reaches the rated rotation speed, the working electrode 13 is moved above the centrifugal turntable 11 by the moving device, so that the working electrode 13 extends into the alloy melt 15 liquid film and has a gap 16 with the surface of the centrifugal turntable 11, then the working electrode 13 is kept stationary, a complete loop is formed by the working electrode 13, the alloy melt 15 and the external power supply 14, and the alloy melt 15 can be charged, so that the surface tension of the alloy melt 15 is reduced, and as the centrifugal turntable 11 rotates relative to the working electrode 13, the working electrode 13 can damage an oxide film possibly existing on the surface of the alloy melt 15 liquid film, and the fluctuation level of the alloy melt 15 liquid film can be increased, so that the atomization effect is better.
Wherein, reducing the surface tension of the alloy melt 15, destroying the oxide film possibly existing on the surface of the liquid film of the alloy melt 15, and increasing the fluctuation level of the liquid film of the alloy melt 15 all have positive effects of improving the atomization effect.
In some embodiments, the working electrode 13 has a first distance from the central axis of the centrifugal rotor 11, the first distance satisfying the following relationship:
；
in the method, in the process of the application,for the first distance, R is the radius of the centrifugal rotor disc 11.
Specifically, by setting the first distance, the working electrode 13 can enhance the fluctuation level of the liquid film of the alloy melt 15, and can also directly damage the oxide film on the surface of the liquid film of the alloy melt 15, so that the atomization effect is better.
In some embodiments, gap 16 satisfies the following relationship:
；
in the method, in the process of the application,is the height of the gap 16 (i.e. the linear distance between the end of the working electrode 13 and the upper surface of the centrifugal turntable 11)>The first thickness is the thickness of the alloy melt 15 at a first distance of the working electrode 13 relative to the central axis of the centrifugal turntable 11.
Specifically, by providing the gap 16, the safe distance between the working electrode 13 and the centrifugal turntable 11 can be ensured, and accidents such as collision between the working electrode 13 and the centrifugal turntable 11 can be avoided.
In some embodiments, the first thickness is calculated according to the following formula:
；
in the method, in the process of the application,for the density of the alloy melt 15 q is the flow rate of the alloy melt 15 into the centrifugal turntable 11 per unit time, +.>For the dynamic viscosity of the alloy melt 15 +.>For the angular velocity of the centrifugal rotor 11 +.>Is the circumference ratio.
Specifically, the calculation formula of the first thickness is derived by the following process, specifically:
at a distance r from the center of the centrifugal turntable 11, the speed of the alloy melt 15 in the thickness directionThe following relationship is satisfied:
(equation 1);
in the method, in the process of the application,for the speed of alloy melt 15 in the thickness direction, +.>For the partial derivative of the speed of the alloy melt 15 in the thickness direction, z is the height in the thickness direction of the alloy melt 15 at a distance r from the centre of the centrifugal turntable 11, +.>For the density of the alloy melt 15>For the dynamic viscosity of the alloy melt 15 +.>Is the angular velocity of the centrifugal rotor 11;
the alloy melt 15 near the surface of the centrifugal rotor 11 has no slip relative to the surface of the centrifugal rotor 11, with the boundary conditions z=0, u=0; at the height h of the upper surface of the alloy melt 15 (h is the thickness of the alloy melt 15 here), the upper surface of the alloy melt 15 here is in contact with an inert gas, with the boundary conditions:
(equation 2);
it is possible to obtain a velocity distribution of the alloy melt 15 in its thickness direction at an arbitrary r from the center of the centrifugal turntable 11 as follows:
(equation 3);
again, in terms of conservation of mass, the flow rate of alloy melt 15 to the surface of centrifugal turntable 11 can be expressed as:
(equation 4);
wherein q is the flow rate of atomized alloy melt in unit time, which is determined by the atomization process, and is the prior art.
According to equations 1-4, the thickness h of the alloy melt 15 from the center r of the centrifugal turntable 11 can be obtained as:
(equation 5);
in order to simultaneously realize the charge to the alloy melt 15, enhance the fluctuation level of the alloy melt 15 and simultaneously directly destroy the effect of the oxide film on the surface of the liquid film of the alloy melt 15, a proper distance X exists between the graphite electrode and the center of the centrifugal turntable 11, and according to the formula 5, the thickness of the alloy melt 15 at the center X of the centrifugal turntable 11 is as follows:
(equation 6).
In some embodiments, the moving device comprises a servo motor 21, a fixing mechanism 22, a feeding mechanism 23 and a clamping mechanism 24, wherein the fixing mechanism 22 is connected with the top wall of the atomizing chamber, the servo motor 21 and the feeding mechanism 23 are hung on the fixing mechanism 22, the clamping mechanism 24 is arranged at the output end of the feeding mechanism 23, clamping heads which are in one-to-one correspondence with the working electrodes 13 are arranged on the clamping mechanism 24, the clamping heads are used for clamping the working electrodes 13, and the servo motor 21 is used for driving the feeding mechanism 23 to move so as to drive the working electrodes 13 on the clamping heads to be close to or far away from the centrifugal turntable 11.
Wherein the clamping mechanism 24 and the collet are both made of an insulating material.
Specifically, as shown in fig. 1, by setting the fixing mechanism 22 to connect with the top wall of the atomizing chamber, the servo motor 21 and the feeding mechanism 23 are hung on the fixing mechanism 22, the servo motor 21 rotates to drive the feeding mechanism 23 to move according to a preset step length (which can be set according to actual needs), so as to drive the working electrode 13 on the clamping head to approach the centrifugal turntable 11 until reaching a specified position, wherein the initial position of the working electrode 13 to the position of the centrifugal turntable 11 can be preset, the specific limitation is not made here, during actual use, the rotation number of the servo motor 21 is directly controlled, so that the working electrode 13 can reach the specified position, and after the atomization work is finished, the servo motor 21 drives the feeding mechanism 23 to drive the working electrode 13 on the clamping head to be far away from the centrifugal turntable 11 to the initial position.
In some embodiments, working electrode 13 is a graphite electrode.
Specifically, since the electrode made of a general metal material cannot be used for melts of aluminum alloys or the like having strong corrosiveness, if the alloy melt 15 is not so strong, an electrode made of a refractory metal or a high-temperature metal may be used, and in the present application, the working electrode 13 is preferably a graphite electrode, and graphite may be used in most alloy melts 15.
In some embodiments, the centrifugal turntable 11 is provided with an annular groove 31, the opening of the annular groove 31 faces the working electrode 13, and the depth d of the annular groove 31 is not more than 0.5mm and less than 5% of the thickness of the centrifugal turntable 11.
Specifically, when the atomizing process of the centrifugal turntable 11 is used for additive manufacturing of metal powder raw material production, the powder particle diameter is generally less than 150 μm, such as the powder particle diameter range required for SLM process is 15 μm to 53 μm, at which time the thickness of the alloy melt 15 on the surface of the centrifugal turntable 11 is reduced to within 100 μm, which brings about a difficulty in accurate positioning of the working electrode 13, and therefore, as shown in fig. 2 and 3, an annular groove 31 is provided on the centrifugal turntable 11 with the opening of the annular groove 31 facing the working electrode 13, so that it is not necessary to precisely calculate the gap 16 between the working electrode 13 and the upper surface of the centrifugal turntable 11, and the centrifugal turntable 11 is prevented from being broken by stress concentration generated at the position of the annular groove 31 at the time of high-speed rotation by the limitation of the depth of the annular groove 31.
The cross section of the annular groove 31 may be rectangular, trapezoidal, semi-elliptical or semicircular.
In some embodiments, the width of working electrode 13 is no more than 3mm, the width of annular groove 31 is at least 2mm greater than the width of working electrode 13, and the width of annular groove 31 is 2.5mm-6mm.
Specifically, by providing the width c of the annular groove 31 to be larger than the width b of the working electrode 13 by at least 2mm, as shown in fig. 3, the positioning accuracy requirement of the working electrode 13 can be reduced, and at the same time, the working electrode 13 can be prevented from colliding with the centrifugal turntable 11.
In some embodiments, the end of the working electrode 13 is flush with the upper surface of the centrifugal rotor disk 11.
Specifically, for convenience of positioning, the end of the working electrode 13 is directly leveled with the upper surface of the centrifugal turntable 11 (as in the dotted line position on the annular groove 31 in fig. 3), so that accurate positioning is not required, and the use cost is reduced; in practical applications, the specific position of the working electrode 13 may also be controlled according to the gap 16 (the calculation process is as above) between the working electrode 13 and the lower surface of the centrifugal turntable 11 (i.e. the bottom surface of the annular groove 31), which is not particularly limited herein.
In a second aspect, the present application provides a method of using a centrifugal atomizer, the method of using comprising:
s1, starting a driving device 12 to enable the rotating speed of a centrifugal turntable 11 to reach the atomizing process requirement;
s2, moving the working electrode 13 to a designated position in the alloy melt 15 through a moving device;
s3, pouring alloy melt 15 into the centrifugal turntable 11;
s4, turning on an external power supply 14;
s5, after atomization is finished, the external power supply 14 is turned off, the working electrode 13 is moved away from the centrifugal turntable 11 by the moving device, and the driving device 12 is turned off.
Specifically, by setting steps S1-S5, when the centrifugal turntable 11 atomizes, the centrifugal turntable 11 rotates relative to the working electrode 13, so that an oxide film possibly existing on the surface of the liquid film of the alloy melt 15 is damaged by the working electrode 13, fluctuation of the liquid film of the alloy melt 15 can be increased, so that the atomization effect is better, and meanwhile, a closed loop is formed among the external power supply 14, the alloy melt 15 and the working electrode 13, so that the surface tension of the alloy melt 15 is effectively reduced, and further the atomization effect is improved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
Further, the units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Furthermore, functional modules in various embodiments of the present application may be integrated together to form a single portion, or each module may exist alone, or two or more modules may be integrated to form a single portion.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above embodiments of the present application are only examples, and are not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A centrifugal atomizer, which comprises an atomization chamber and is characterized by also comprising a centrifugal turntable (11), a driving device (12), at least two working electrodes (13), a moving device and an external power supply (14); the centrifugal turntable (11), the driving device (12), the working electrode (13) and the moving device are arranged in the atomization chamber;
the centrifugal turntable (11) is connected with the driving device (12), the driving device (12) is used for driving the centrifugal turntable (11) to rotate, and the centrifugal turntable (11) is used for driving the alloy melt (15) flowing onto the centrifugal turntable (11) to perform centrifugal movement so as to perform atomization;
each working electrode (13) is respectively fixed on the moving device and uniformly arranged at intervals around the central axis of the centrifugal turntable (11), the moving device is used for moving the working electrode (13) to the upper part of the centrifugal turntable (11), so that the working electrode (13) stretches into a liquid film of an alloy melt (15) and has a gap (16) with the surface of the centrifugal turntable (11), the positive electrode of an external power supply (14) is arranged above the centrifugal turntable (11) and is used for being connected with the alloy melt (15), and the negative electrode of the external power supply (14) is connected with the working electrode (13).
2. Centrifugal atomizer according to claim 1, wherein the working electrode (13) has a first distance from the central axis of the centrifugal rotor (11), said first distance satisfying the following relation:
；
in the method, in the process of the application,for the first distance, R is the radius of the centrifugal turntable (11).
3. Centrifugal atomizer according to claim 2, wherein the gap (16) fulfils the following relation:
；
in the method, in the process of the application,for the height of the gap (16),/-, is defined>Is a first thickness, which is the thickness of the alloy melt (15) at a first distance of the working electrode (13) relative to the central axis of the centrifugal rotor disc (11).
4. A centrifugal atomizer according to claim 3, wherein said first thickness is calculated according to the formula:
；
in the method, in the process of the application,q is the flow rate of the alloy melt (15) flowing into the centrifugal rotor (11) per unit time for the density of the alloy melt (15), -A->For the dynamic viscosity of the alloy melt (15), and (2)>For the angular velocity of the centrifugal rotor (11),is the circumference ratio.
5. Centrifugal atomizer according to claim 1, characterized in that the moving means comprise a servo motor (21), a fixing mechanism (22), a feeding mechanism (23) and a clamping mechanism (24), the fixing mechanism (22) is connected with the top wall of the atomizing chamber, the servo motor (21) and the feeding mechanism (23) are hung on the fixing mechanism (22), the clamping mechanism (24) is arranged at the output end of the feeding mechanism (23), clamping heads which are in one-to-one correspondence with the working electrodes (13) are arranged on the clamping mechanism (24), the clamping heads are used for clamping the working electrodes (13), and the servo motor (21) is used for driving the feeding mechanism (23) to move so as to drive the working electrodes (13) on the clamping heads to be close to or far away from the centrifugal turntable (11).
6. Centrifugal atomizer according to claim 5, wherein the working electrode (13) is a graphite electrode.
7. Centrifugal atomizer according to claim 1, characterized in that the centrifugal turntable (11) is provided with an annular groove (31), the opening of the annular groove (31) facing the working electrode (13), the depth of the annular groove (31) not exceeding 0.5mm and being less than 5% of the thickness of the centrifugal turntable (11).
8. Centrifugal atomizer according to claim 7, wherein the width of the working electrode (13) is not more than 3mm, the width of the annular groove (31) is at least 2mm larger than the width of the working electrode (13), and the width of the annular groove (31) is 2.5-6 mm.
9. Centrifugal atomizer according to claim 7, wherein the end of the working electrode (13) is leveled with the upper surface of the centrifugal rotor (11).
10. A method of using a centrifugal atomizer according to any one of claims 1-9, said method of using comprising:
s1, starting the driving device (12) to enable the rotating speed of the centrifugal turntable (11) to reach the atomizing process requirement;
s2, moving the working electrode (13) to a designated position in the alloy melt (15) through the moving device;
s3, pouring the alloy melt (15) into the centrifugal turntable (11);
s4, turning on an external power supply (14);
s5, turning off an external power supply (14) after atomization is finished, moving the working electrode (13) away from the centrifugal turntable (11) through the moving device, and turning off the driving device (12).
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08209207A (en) * | 1995-02-02 | 1996-08-13 | Masumoto Takeshi | Production of metal powder |
| US6423113B1 (en) * | 1996-06-14 | 2002-07-23 | The United States Of America As Represented By The Secretary Of The Navy | Continuous fluid atomization of materials in a rapidly spinning cup |
| CN102416472A (en) * | 2011-12-08 | 2012-04-18 | 沈阳工业大学 | Spray forming atomization device for applying static electricity to metal liquid and atomization method for device |
| CN109622982A (en) * | 2018-12-30 | 2019-04-16 | 北京康普锡威科技有限公司 | The preparation facilities and preparation method of metal powder |
| CN112620642A (en) * | 2020-12-29 | 2021-04-09 | 深圳市福英达工业技术有限公司 | Centrifugal atomization device and method for preparing high-temperature high-surface-tension metal powder |
| CN113059170A (en) * | 2021-03-18 | 2021-07-02 | 中国科学院力学研究所 | Rotary table device for preparing small-particle-size powder in metal centrifugal atomization |
| JP2021181597A (en) * | 2020-05-19 | 2021-11-25 | シンフォニアテクノロジー株式会社 | Device and method for centrifugal spray |
| CN116275072A (en) * | 2023-02-23 | 2023-06-23 | 季华实验室 | Centrifugal atomizer and control method thereof |
-
2023
- 2023-09-28 CN CN202311275629.2A patent/CN116984619B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08209207A (en) * | 1995-02-02 | 1996-08-13 | Masumoto Takeshi | Production of metal powder |
| US6423113B1 (en) * | 1996-06-14 | 2002-07-23 | The United States Of America As Represented By The Secretary Of The Navy | Continuous fluid atomization of materials in a rapidly spinning cup |
| CN102416472A (en) * | 2011-12-08 | 2012-04-18 | 沈阳工业大学 | Spray forming atomization device for applying static electricity to metal liquid and atomization method for device |
| CN109622982A (en) * | 2018-12-30 | 2019-04-16 | 北京康普锡威科技有限公司 | The preparation facilities and preparation method of metal powder |
| JP2021181597A (en) * | 2020-05-19 | 2021-11-25 | シンフォニアテクノロジー株式会社 | Device and method for centrifugal spray |
| CN112620642A (en) * | 2020-12-29 | 2021-04-09 | 深圳市福英达工业技术有限公司 | Centrifugal atomization device and method for preparing high-temperature high-surface-tension metal powder |
| CN113059170A (en) * | 2021-03-18 | 2021-07-02 | 中国科学院力学研究所 | Rotary table device for preparing small-particle-size powder in metal centrifugal atomization |
| CN116275072A (en) * | 2023-02-23 | 2023-06-23 | 季华实验室 | Centrifugal atomizer and control method thereof |
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