CN106424747A - Tin-powder ultrasonic atomization device and atomization process thereof - Google Patents
Tin-powder ultrasonic atomization device and atomization process thereof Download PDFInfo
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- CN106424747A CN106424747A CN201611068664.7A CN201611068664A CN106424747A CN 106424747 A CN106424747 A CN 106424747A CN 201611068664 A CN201611068664 A CN 201611068664A CN 106424747 A CN106424747 A CN 106424747A
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- atomization
- tank
- glass putty
- transducer
- ultrasonic
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Classifications
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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
-
- 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
- B22F2009/0804—Dispersion in or on liquid, other than with sieves
- B22F2009/0808—Mechanical dispersion of melt, e.g. by sieves
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Abstract
The invention discloses a tin-powder ultrasonic atomization device. The tin-powder ultrasonic atomization device comprises a tool head, wherein an amplitude varying pole is arranged on one side of the tool head, a cooling device is arranged on one side of the amplitude varying pole, a transducer front cover is arranged at the part, in the cooling device and located at one end of the amplitude varying pole, a transducer rear cover is arranged on one side of the transducer front cover, a piezoelectric ceramic stack is arranged between the transducer front cover and the transducer rear cover, an electrode lead electrically connected to the piezoelectric ceramic stack is arranged on one side of the cooling device, and a signal generator is arranged at one end of the electrode lead. Ultrasonic atomization of tin powder researched and developed by the invention can fundamentally solve the defects, ultrasonic is formed according to liquid surface tension waves to generate atomization, namely liquid metal forms a liquid film on the surface of an atomization head under ultrasonic vibration, and then the liquid film is broken by the effect of the vibration, uniform spheres are separated from the liquid film and formed, so that the sphericity of the generated powder is higher.
Description
Technical field
The present invention relates to atomization tin powder technical field, more particularly to a kind of ultrasonic atomization glass putty device and its atomization work
Skill.
Background technology
Stannum is one of higher mineral of development and utilization level in current China's non-ferrous metal, be widely used in metallurgy, electronics,
The industry such as electrical equipment, chemical industry, building materials, machinery and packaging for foodstuff.With the continuous development in the world of unleaded trend, electricity
Sub- product producer will be more by glass putty materials application in product.Meanwhile, with the continuous enhancing of environmental consciousness, stannum
The asepsis environment-protecting attribute of powder will make which be constantly applied to medicine, chemical industry, light industry, food, health care, art supplies in future
Deng packaging field.The importance of glass putty is it is increasingly evident that embody.
At present domestic mainly adopt centrifugal spraying mode, using by the way of be that the centrifugal force that caused using machinery rotation will
Molten metal stream is broken for droplet, is then solidified as the milling method of solid state powder.Centrifugal atomizing because its operation principle be according to
Solution is outwards thrown away by centrifugal force, form spherical, the glass putty of in the air molding in atmosphere, sphericity can be by cooling temperature limiting
And the unstable factor such as technique causes powder body sphericity not good enough, being had an impact by property for SMT high accuracy prints is put into the later stage.
In addition, because centrifugal atomizing needs the space for more increasing to be cooled down, tank body space is bigger, the control to oxygen content in gas
More it is difficult to reach equal control, so the oxygen content degree of stability of powder surface is inadequate, oxygen content fluctuation ratio is larger, powder body oxygen content
Characteristic is not sufficiently stable.
In addition, for centrifugal atomizing technique, in the majority beyond fine powder beyond Eligibility requirements, the screening to the later stage divides
From causing bigger difficulty, it is difficult to ensure the uniformity of particle diameter, need dust treatment plant is in addition done, micropowder is removed, but here
During, can there is secondary destruction to qualified product surface in the friction of pipeline, damage including the sphericity after surface collision
The destruction of bad and oxide layer.These are all the problems for needing us to go to solve.
Content of the invention
The invention aims to shortcoming present in prior art is solved, and a kind of ultrasonic atomization glass putty for proposing
Device and its atomization process.
To achieve these goals, following technical scheme present invention employs：
A kind of ultrasonic atomization glass putty device, including tool heads, the tool heads side is provided with horn, the horn
Side is provided with chiller, is provided with transducer protecgulum, the transducer protecgulum one positioned at horn one end in the chiller
Side is provided between transducer bonnet, and transducer protecgulum and transducer bonnet and is provided with piezoelectric ceramic stack, and the chiller side sets
There is the contact conductor for being electrically connected at piezoelectric ceramic stack, described contact conductor one end is provided with signal generator.
Preferably, the transducer bonnet side is provided with the pre-stressed bolt for being threaded io transducer bonnet.
Preferably, described transducer protecgulum (3) identical with the cross-sectional area of transducer bonnet (5).
A kind of atomization process of ultrasonic atomization glass putty device that the present invention is also provided, comprises the steps：
S1：By in deployed ladle refining tin melting furnace, and the atmosphere in atomization tank is formulated to the atmosphere needed for atomization,
Oxygen content is in 150-400ppm；
S2：When metal liquid in the tin melting furnace reaches 250-300 DEG C, inlet valve is automatically turned on, and liquid flows to intermediate furnace；
S3：The liquid of intermediate furnace is entered through four heat tracing pipelines, be incubated at 210-300 DEG C, mozzle flowed to, through leading
Liquid after flow tube retention falls on ultrasonic atomization head；
S4：Ultrasonic frequency is set in the range of 30KHz-50KHz, atomization control is carried out to liquid；
S5：Now, the malleation that controls in atomization tank is remained between 200Pa-1kPa, while automatically by tank body
Oxygen content be maintained in the range of 150-400ppm；
S6：After the powder body in tank body reaches 50Kg, start powder is put, using isolating seal tank, the finished product in tank is collected simultaneously
Sealing transport, until subsequent processing carries out product examine, packaging and warehouse-in.
Preferably, the supersonic atomizer in the atomization filling is to be symmetrically arranged with two, such that it is able to more preferably more complete
Face to glass putty be atomized.
Preferably, temperature-detecting device being equipped with the tin melting furnace, intermediate furnace and atomization tank, can preferably detect dress
Middle temperature is put, preferably glass putty atomization process can be controlled.
Preferably, the cooling in the glass putty atomization process in the atomization tank is cooled down by the way of circulating chilled water.
Preferably, the cooling in the glass putty atomization process in the atomization tank is cooled down by the way of circulating chilled water.
Preferably, the oxygen concentration in the atomization tank relies on air pressure pump to be pressed into compressed air into tank so as to reach
The control of concentration.
Preferably, the atomization tank side is provided with the trace oxygen analyzer for measuring oxygen concentration in tank.
Preferably, the cold water of the glass putty atomization process circulating chilled water cooling in the atomization tank needs to carry out water quality detection,
To contain glass putty in waterproof, so as to can determine whether cooling system whether normal operation.
Compared with prior art, the invention has the beneficial effects as follows：The ultrasonic atomization glass putty of present invention research and development can be from root
Above drawback is solved on this, ultrasound wave is atomization to be produced according to the molding of surface tension of liquid ripple, i.e., liquid metal is in ultrasound wave
Under vibrations, liquid film is formed in atomization head surface, liquid film is breached by shock effect again, departs from and form uniform ball from liquid film
Body, therefore the powder body sphericity for producing is higher, meanwhile, because the yielding poorly of ultrasonic atomization, Product Precision height, easily realize atomization
Tank gas and the control of pressure, the uniformity of the significantly more efficient sphericity for having ensured powder surface and oxygen content.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the process chart of ultrasonic atomization glass putty equipment of the present invention.
In figure：1 tool heads, 2 horn, 3 transducer protecgulums, 4 piezoelectric ceramic stacks, 5 transducer bonnets, 6 pre-stressed bolts,
7 chillers, 8 contact conductors, 9 signal generators.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, not
For limiting the present invention.
Embodiment 1
A kind of ultrasonic atomization glass putty device, including tool heads 1,1 side of the tool heads is provided with horn 2, the change
2 side of width bar is provided with chiller 7, is provided with transducer protecgulum 3, the transducing positioned at 2 one end of horn in the chiller 7
3 side of device protecgulum is provided between transducer bonnet 5, and transducer protecgulum 3 and transducer bonnet 5 and is provided with piezoelectric ceramic stack 4, described cold
But 7 side of device is provided with the contact conductor 8 for being electrically connected at piezoelectric ceramic stack 4, and 8 one end of the contact conductor is provided with signal generation
Device 9.5 side of transducer bonnet is provided with the pre-stressed bolt 6 for being threaded io transducer bonnet 3.The transducer protecgulum 3
Identical with the cross-sectional area of transducer bonnet 5.
A kind of atomization process of ultrasonic atomization glass putty device that the present invention is also provided, comprises the steps：
S1：By in deployed ladle refining tin melting furnace, and the atmosphere in atomization tank is formulated to the atmosphere needed for atomization,
Oxygen content is in 150ppm；
S2：When metal liquid in the tin melting furnace reaches 250 DEG C, inlet valve is automatically turned on, and liquid flows to intermediate furnace；
S3：The liquid of intermediate furnace is entered through four heat tracing pipelines, be incubated at 210 DEG C, mozzle flowed to, through mozzle
Liquid after retention falls on ultrasonic atomization head；
S4：Ultrasonic frequency is set in the range of 30KHz, atomization control is carried out to liquid；
S5：Now, the malleation that controls in atomization tank is remained between 200Pa, while automatically by the oxygen in tank body
Content is maintained in the range of 150ppm；
S6：After the powder body in tank body reaches 50Kg, start powder is put, using isolating seal tank, the finished product in tank is collected simultaneously
Sealing transport, until subsequent processing carries out product examine, packaging and warehouse-in.
Supersonic atomizer in the atomization filling is to be symmetrically arranged with two, such that it is able to more preferably more fully to stannum
Dust cloud.Temperature-detecting device is equipped with the tin melting furnace, intermediate furnace and atomization tank, can the more preferable middle temperature of detection means
Degree, preferably can be controlled to glass putty atomization process.The cooling in glass putty atomization process in the atomization tank is using cold
The mode of water circulation is cooled down.Oxygen concentration in the atomization tank rely on air pressure pump be pressed into into tank compressed air from
And reach the control of concentration.The atomization tank side is provided with the trace oxygen analyzer for measuring oxygen concentration in tank.The mist
The cold water for changing the cooling of the glass putty atomization process circulating chilled water in tank needs to carry out water quality detection, to contain glass putty in waterproof, so as to
Can determine whether cooling system whether normal operation.
Embodiment 2
A kind of ultrasonic atomization glass putty device, including tool heads 1,1 side of the tool heads is provided with horn 2, the change
2 side of width bar is provided with chiller 7, is provided with transducer protecgulum 3, the transducing positioned at 2 one end of horn in the chiller 7
3 side of device protecgulum is provided between transducer protecgulum 5, and transducer protecgulum 3 and transducer bonnet 5 and is provided with piezoelectric ceramic stack 4, described cold
But 7 side of device is provided with the contact conductor 8 for being electrically connected at piezoelectric ceramic stack 4, and 8 one end of the contact conductor is provided with signal generation
Device 9.5 side of transducer bonnet is provided with the pre-stressed bolt 6 for being threaded io transducer bonnet 3.The transducer protecgulum 3
Identical with the cross-sectional area of transducer bonnet 5.
A kind of atomization process of ultrasonic atomization glass putty device that the present invention is also provided, comprises the steps：
S1：By in deployed ladle refining tin melting furnace, and the atmosphere in atomization tank is formulated to the atmosphere needed for atomization,
Oxygen content is in 300ppm；
S2：When metal liquid in the tin melting furnace reaches 280 DEG C, inlet valve is automatically turned on, and liquid flows to intermediate furnace；
S3：The liquid of intermediate furnace is entered through four heat tracing pipelines, be incubated at 250 DEG C, mozzle flowed to, through mozzle
Liquid after retention falls on ultrasonic atomization head；
S4：Ultrasonic frequency is set in the range of 40KHz, atomization control is carried out to liquid；
S5：Now, the malleation that controls in atomization tank is remained between 600Pa, while automatically by the oxygen in tank body
Content is maintained in the range of 300ppm；
S6：After the powder body in tank body reaches 50Kg, start powder is put, using isolating seal tank, the finished product in tank is collected simultaneously
Sealing transport, until subsequent processing carries out product examine, packaging and warehouse-in.
Supersonic atomizer in the atomization filling is to be symmetrically arranged with two, such that it is able to more preferably more fully to stannum
Dust cloud.Temperature-detecting device is equipped with the tin melting furnace, intermediate furnace and atomization tank, can the more preferable middle temperature of detection means
Degree, preferably can be controlled to glass putty atomization process.The cooling in glass putty atomization process in the atomization tank is using cold
The mode of water circulation is cooled down.Oxygen concentration in the atomization tank rely on air pressure pump be pressed into into tank compressed air from
And reach the control of concentration.The atomization tank side is provided with the trace oxygen analyzer for measuring oxygen concentration in tank.The mist
The cold water for changing the cooling of the glass putty atomization process circulating chilled water in tank needs to carry out water quality detection, to contain glass putty in waterproof, so as to
Can determine whether cooling system whether normal operation.
Embodiment 3
A kind of ultrasonic atomization glass putty device, including tool heads 1,1 side of the tool heads is provided with horn 2, the change
2 side of width bar is provided with chiller 7, is provided with transducer protecgulum 3, the transducing positioned at 2 one end of horn in the chiller 7
3 side of device protecgulum is provided between transducer bonnet 5, and transducer protecgulum 3 and transducer bonnet 5 and is provided with piezoelectric ceramic stack 4, described cold
But 7 side of device is provided with the contact conductor 8 for being electrically connected at piezoelectric ceramic stack 4, and 8 one end of the contact conductor is provided with signal generation
Device 9.5 side of transducer bonnet is provided with the pre-stressed bolt 6 for being threaded io transducer bonnet 3.The transducer protecgulum 3
Identical with the cross-sectional area of transducer bonnet 5.
A kind of atomization process of ultrasonic atomization glass putty device that the present invention is also provided, comprises the steps：
S1：By in deployed ladle refining tin melting furnace, and the atmosphere in atomization tank is formulated to the atmosphere needed for atomization,
Oxygen content is in 400ppm；
S2：When metal liquid in the tin melting furnace reaches 300 DEG C, inlet valve is automatically turned on, and liquid flows to intermediate furnace；
S3：The liquid of intermediate furnace is entered through four heat tracing pipelines, be incubated at 300 DEG C, mozzle flowed to, through mozzle
Liquid after retention falls on ultrasonic atomization head；
S4：Ultrasonic frequency is set in the range of 50KHz, atomization control is carried out to liquid；
S5：Now, the malleation that controls in atomization tank is remained between 1kPa, while containing the oxygen in tank body automatically
Amount is maintained in the range of 400ppm；
S6：After the powder body in tank body reaches 50Kg, start powder is put, using isolating seal tank, the finished product in tank is collected simultaneously
Sealing transport, until subsequent processing carries out product examine, packaging and warehouse-in.
Supersonic atomizer in the atomization filling is to be symmetrically arranged with two, such that it is able to more preferably more fully to stannum
Dust cloud.Temperature-detecting device is equipped with the tin melting furnace, intermediate furnace and atomization tank, can the more preferable middle temperature of detection means
Degree, preferably can be controlled to glass putty atomization process.The cooling in glass putty atomization process in the atomization tank is using cold
The mode of water circulation is cooled down.Oxygen concentration in the atomization tank rely on air pressure pump be pressed into into tank compressed air from
And reach the control of concentration.The atomization tank side is provided with the trace oxygen analyzer for measuring oxygen concentration in tank.The mist
The cold water for changing the cooling of the glass putty atomization process circulating chilled water in tank needs to carry out water quality detection, to contain glass putty in waterproof, so as to
Can determine whether cooling system whether normal operation.
The present invention research and development ultrasonic atomization glass putty can fundamentally solve above drawback, ultrasound wave be according to liquid table
Tensile wave molding in face produces atomization, i.e. liquid metal under the vibrations of ultrasound wave, forms liquid film in atomization head surface, liquid film again by
Shock effect is breached, and departs from and forms uniform spheroid, therefore the powder body sphericity for producing is higher from liquid film, meanwhile, because
The yielding poorly of ultrasonic atomization, Product Precision height, easily realize the control of atomization tank gas and pressure, significantly more efficient guarantee
The uniformity invention of the sphericity of powder surface and oxygen content.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, should all be included within the scope of the present invention.
Claims (10)
1. a kind of ultrasonic atomization glass putty device, including tool heads (1), it is characterised in that：Tool heads (1) side is provided with change
Width bar (2), horn (2) side is provided with chiller (7), sets positioned at horn (2) one end in chiller (7)
There is transducer protecgulum (3), transducer protecgulum (3) side is provided with transducer bonnet (5), and transducer protecgulum (3) and transducing
Piezoelectric ceramic stack (4) is provided between device bonnet (5), and chiller (7) side is provided with and is electrically connected at piezoelectric ceramic stack (4)
Contact conductor (8), contact conductor (8) one end is provided with signal generator (9).
2. a kind of ultrasonic atomization glass putty device according to claim 1, it is characterised in that：Transducer bonnet (5)
Side is provided with the pre-stressed bolt (6) for being threaded io transducer bonnet (3).
3. a kind of ultrasonic atomization glass putty device according to claim 1, it is characterised in that：Transducer protecgulum (3)
Identical with the cross-sectional area of transducer bonnet (5).
4. the atomization process of the ultrasonic atomization glass putty device described in a kind of claim 1, it is characterised in that：Walk including following
Suddenly：
S1：By in deployed ladle refining tin melting furnace, and the atmosphere in atomization tank is formulated to the atmosphere needed for atomization, oxygen
Content is in 150-400ppm；
S2：When metal liquid in the tin melting furnace reaches 250-300 DEG C, inlet valve is automatically turned on, and liquid flows to intermediate furnace；
S3：The liquid of intermediate furnace is entered through four heat tracing pipelines, be incubated at 210-300 DEG C, mozzle flowed to, through mozzle
Liquid after retention falls on ultrasonic atomization head；
S4：Ultrasonic frequency is set in the range of 30KHz-50KHz, atomization control is carried out to liquid；
S5：Now, the malleation that controls in atomization tank is remained between 200Pa-1kPa, while automatically by the oxygen in tank body
Content is maintained in the range of 150-400ppm；
S6：After the powder body in tank body reaches 50Kg, start powder is put, using isolating seal tank, the finished product in tank is collected and seal
Transport, until subsequent processing carries out product examine, packaging and warehouse-in.
5. the atomization process of the ultrasonic atomization glass putty device described in a kind of claim 4, it is characterised in that：In the atomization is filled
Supersonic atomizer for being symmetrically arranged with two, such that it is able to more preferably more fully be atomized to glass putty.
6. the atomization process of the ultrasonic atomization glass putty device described in a kind of claim 4, it is characterised in that：The tin melting furnace,
Temperature-detecting device is equipped with intermediate furnace and atomization tank, can more preferable temperature in detection means, can be preferably to glass putty
Atomization process is controlled.
7. the atomization process of the ultrasonic atomization glass putty device described in a kind of claim 4, it is characterised in that：In the atomization tank
Glass putty atomization process in cooling cooled down by the way of circulating chilled water.
8. the atomization process of the ultrasonic atomization glass putty device described in a kind of claim 4, it is characterised in that：In the atomization tank
Oxygen concentration rely on air pressure pump be pressed into compressed air into tank so as to reach the control of concentration.
9. the atomization process of the ultrasonic atomization glass putty device described in a kind of claim 4, it is characterised in that：The atomization tank one
Side is provided with the trace oxygen analyzer for measuring oxygen concentration in tank.
10. the atomization process of the ultrasonic atomization glass putty device described in a kind of claim 4, it is characterised in that：The atomization tank
In glass putty atomization process circulating chilled water cooling cold water need to carry out water quality detection, to contain glass putty in waterproof, so as to sentencing
The whether normal operation of disconnected cooling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611068664.7A CN106424747A (en) | 2016-11-29 | 2016-11-29 | Tin-powder ultrasonic atomization device and atomization process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611068664.7A CN106424747A (en) | 2016-11-29 | 2016-11-29 | Tin-powder ultrasonic atomization device and atomization process thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN106424747A true CN106424747A (en) | 2017-02-22 |
Family
ID=58219052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201611068664.7A Pending CN106424747A (en) | 2016-11-29 | 2016-11-29 | Tin-powder ultrasonic atomization device and atomization process thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138733A (en) * | 2017-07-10 | 2017-09-08 | 山东科技大学 | Ultrasonic vibration atomization prepares device, method and the 3D printing system of metal dust |
| CN110116214A (en) * | 2019-04-26 | 2019-08-13 | 西北工业大学 | The uniform tin alloy ball side direction perturbation of micron order sprays preparation facilities |
| CN110465672A (en) * | 2019-09-17 | 2019-11-19 | 中国科学院理化技术研究所 | A kind of metal powder with low melting point and its preparation method and application |
| CN111715440A (en) * | 2020-07-03 | 2020-09-29 | 徐詹程 | Full-automatic ultrasonic dry chemical multilayer film preparation equipment |
| CN113102735A (en) * | 2021-03-30 | 2021-07-13 | 西北工业大学 | Immersion type three-dimensional ultrasonic metal solidification device and method with controllable sound field |
| CN115090891A (en) * | 2022-08-25 | 2022-09-23 | 西安赛隆增材技术股份有限公司 | Plasma rotating electrode atomization powder making equipment and powder making method |
-
2016
- 2016-11-29 CN CN201611068664.7A patent/CN106424747A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138733A (en) * | 2017-07-10 | 2017-09-08 | 山东科技大学 | Ultrasonic vibration atomization prepares device, method and the 3D printing system of metal dust |
| CN107138733B (en) * | 2017-07-10 | 2019-07-02 | 山东科技大学 | Ultrasonic vibration atomization prepares device, method and the 3D printing system of metal powder |
| CN110116214A (en) * | 2019-04-26 | 2019-08-13 | 西北工业大学 | The uniform tin alloy ball side direction perturbation of micron order sprays preparation facilities |
| CN110465672A (en) * | 2019-09-17 | 2019-11-19 | 中国科学院理化技术研究所 | A kind of metal powder with low melting point and its preparation method and application |
| CN111715440A (en) * | 2020-07-03 | 2020-09-29 | 徐詹程 | Full-automatic ultrasonic dry chemical multilayer film preparation equipment |
| CN113102735A (en) * | 2021-03-30 | 2021-07-13 | 西北工业大学 | Immersion type three-dimensional ultrasonic metal solidification device and method with controllable sound field |
| CN115090891A (en) * | 2022-08-25 | 2022-09-23 | 西安赛隆增材技术股份有限公司 | Plasma rotating electrode atomization powder making equipment and powder making method |
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Application publication date: 20170222 |