CN106378461A - Double-nozzle atomizing device and method for preparing 3D printing spherical metal powder - Google Patents
Double-nozzle atomizing device and method for preparing 3D printing spherical metal powder Download PDFInfo
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- CN106378461A CN106378461A CN201611041807.5A CN201611041807A CN106378461A CN 106378461 A CN106378461 A CN 106378461A CN 201611041807 A CN201611041807 A CN 201611041807A CN 106378461 A CN106378461 A CN 106378461A
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- nozzle
- molten metal
- printing
- metallic powder
- atomization device
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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
- B22F9/082—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 atomising using a fluid
-
- 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
- B22F9/082—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 atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a double-nozzle atomizing device and method for preparing 3D printing spherical metal powder. The double-nozzle atomizing device comprises a tundish used for containing molten metal, and a stepped molten metal delivery tube connected to the outlet position of the tundish. An inner nozzle formed by annular distribution of a plurality of circular holes and an outer nozzle formed by an annular crack are sequentially arranged below the outlet position of the stepped molten metal delivery tube. The stepped molten metal delivery tube is a stepped reducing molten metal delivery tube. The upper end diameter of the stepped molten metal delivery tube is 8-10mm, and the lower end diameter of the stepped molten metal delivery tube is 4-6mm. The diameter of the outer nozzle is larger than that of the inner nozzle. The inner nozzle is a gas atomization nozzle, and the injection vertex angle is 10-40 degrees. By the adoption of the structural layout, airflow can be kept free from diffusion while the airflow speed is increased, the secondary intense crushing atomization effect is made better, and the degree of sphericity of the powder and the fine powder yield can be better increased. The double-nozzle atomizing device is simple and practical, high in cost performance, good in atomization effect and particularly suitable for manufacturing 3D printing micro spherical powder, thereby having broad application prospects.
Description
Technical field
The present invention relates to powder metallurgical technology, more particularly, to a kind of twin-jet nozzle preparing 3D printing globular metallic powder
Atomising device and method.
Background technology
3D printing is a kind of rapid shaping technique, it be a kind of based on 3D mathematical model file, by slicing treatment
Be converted into 2D section combination, then by way of successively printing constructed object technology.In recent years, 3D printing manufacturing technology is sent out
Exhibition is rapid, by the very big concern of countries in the world.The superfine spherical metal powder that exploitation preparation is applied to 3D printing is very necessary,
It is an important bottleneck of 3D printing.3D printing metal dust requires powder must have, and sphericity is high, powder size is thin,
The features such as high purity and good fluidity.The preparation of domestic at present high-quality superfine spherical metal powder is also in laboratory
Conceptual phase, there is no method to realize industrialization production, limits the development of domestic 3D printing manufacturing technology.
And gas atomization is a kind of main method producing metal dust at present, its principle is：Using high velocity air punching
Hit molten metal and liquid metals is broken into tiny drop quick cooled and solidified, thus forming metal dust.Aerosolization system
Powder technology production efficiency is high, low cost, is the current relatively more feasible technology efficiently preparing spherical powder.It is right that developed country passes through
The continuous excavation of aerosolization technology, does not turn off and sends such as the atomization technique such as ultrasonic, restraint-type, combination type, promote powder-making technique
Fast development.Atomizer is the core technology of gas atomization, and Jet control the effect to metal liquid for the air-flow, makes height
The kinetic energy of fast gas is converted into new green powder surface energy.Therefore, the structure of nozzle and combining form determine nebulization efficiency and powder
The performance at end, the improvement to nozzle arrangements and combination and optimization are conducive to improving performance and the quality of gas-atomised powders, so that
Industrialization production for the high-quality superfine spherical metal powder of 3D printing is possibly realized.
Content of the invention
It is an object of the invention to overcoming the shortcoming and defect of above-mentioned prior art, provide that a kind of structure is simple, low cost,
The two-nozzle atomization device and method of the good preparation 3D printing globular metallic powder of atomizing effect, solves prior art preparation
Sphericity difference and the low shortcoming of fine powder recovery rate.
The present invention is achieved through the following technical solutions：
A kind of two-nozzle atomization device preparing 3D printing globular metallic powder, including：For containing the leakage of molten metal
Bag 4；It is engaged on the ladder catheter 1 in bottom pour ladle 4 exit；
It is disposed with inner nozzle 2 He of multiple circular holes distribution annular in shape in the lower section in ladder catheter 1 exit
The outer nozzle 3 that one annular crack is constituted；The annular crack width of described outer nozzle 3 is 0.5mm～1.0mm.
Described ladder catheter 1 adopts stepped tapered catheter, a diameter of 8mm～10mm in its upper end, and lower end diameter is
4mm～6mm.
The diameter with diameter greater than inner nozzle 2 of described outer nozzle 3.
Described inner nozzle 2 is aerosolization nozzle, and its jet apex angle is 10 °～40 °.
Described outer nozzle 3 is aerosolization nozzle, and its jet apex angle is 45 °～60 °.
The import of described inner nozzle 2 and outer nozzle 3 is passed through noble gases.
The aperture of described circular hole is 1.0～1.5mm.
A kind of preparation method of 3D printing globular metallic powder, it comprises the steps：
Molten metal flows into, through ladder catheter 1, the first broken region that inner nozzle 2 is formed, tentatively broken by high velocity air
Continue to drop down after being broken into molten drop；
When molten drop reaches the second broken region that outer nozzle 3 is formed, smashed again by high velocity air, make molten metal
The particle diameter dripping reduces further, after molten drop continues to drop down and leave jeting area, cooled and solidified, and just obtain spherical gold
Belong to powder.
The present invention, with respect to prior art, has such advantages as and effect：
The dual-nozzle configuration that interior outer nozzle setting up and down is constituted is combined using stepped tapered catheter, there is structure letter
Advantage single, easy and simple to handle, that low cost of manufacture, atomizing effect are good.
Combine the optimum organization of stepped catheter using the inside and outside double-stage nozzle of different structure, spray angle, can achieve
The dual strong effect pulverizing atomization of inside and outside twin-jet nozzle, is conducive to obtaining good sphericity and the high metal dust of fine powder recovery rate.
Brief description
Fig. 1 prepares the two-nozzle atomization apparatus structure schematic diagram of 3D printing globular metallic powder for the present invention.
Fig. 2 is inner nozzle structural representation.
Fig. 3 is outer nozzle structural representation.
Specific embodiment
With reference to specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Figures 1 to 3.The invention discloses a kind of two-nozzle atomization device preparing 3D printing globular metallic powder,
Including：For containing the bottom pour ladle 4 of molten metal；It is engaged on the ladder catheter 1 in bottom pour ladle 4 exit；Export in ladder catheter 1
The lower section at place is disposed with the outer nozzle 3 that the inner nozzle 2 of multiple circular holes distribution annular in shape and an annular crack are constituted.
Molten metal can be using stainless steel metal solution, Al-Si alloying metal solution or Cu-Sn alloy solution, specifically can be according to work
Depending on skill requires.
Described ladder catheter 1 adopts stepped tapered catheter, its upper end a diameter of 8mm, 9mm or 10mm, lower end
A diameter of 4mm, 5mm or 6mm.This ladder catheter 1 can prevent heat to scatter and disappear it is ensured that ladder catheter 1 has certain temperature
Gradient, is conducive to the stable outflow of metal fluid column, avoids molten metal backflow to gag somebody simultaneously.
The diameter with diameter greater than inner nozzle 2 of described outer nozzle 3, that is, the broken region of outer nozzle 3 is with diameter greater than inner nozzle 2
Broken regional diameter.
Described inner nozzle 2 is aerosolization nozzle, and its jet apex angle is 10 °, 15 °, 20 °, 30 ° or 40 °, and this angle has
The energy loss of atomizing medium is little, and effectively prevents the adhesion of nozzle, the advantage again improving crushing efficiency.Concrete angle can basis
Depending on actual process requires.
Described outer nozzle 3 adopt annular crack as aerosolization nozzle, its jet apex angle be 40 °, 45 °, 50 °, 55 ° or
60 ° of person, can spray conical atomization curtain, keep gas velocity not dissipate, and make secondary strongly broken while improving air velocity
Broken atomizing effect is more preferable.More good fluidity can be obtained after atomization, the spherical powder that particle diameter is less than 40 μm.When using larger
45 ° of jet apex angles, keep gas velocity not dissipate while improving air velocity, and make secondary strongly broken atomizing effect more
Good.More good fluidity can be obtained after atomization, make smaller than 30 μm of the particle diameter of spherical powder.Concrete angle can be according to reality
Depending on technological requirement.
The import of described inner nozzle 2 and outer nozzle 3 is passed through noble gases, such as using high pure nitrogen, argon etc..
The aperture of described circular hole is 1.0mm, 1.1mm, 1.2mm, 1.3mm or 1.5mm, and concrete aperture can be according to actual work
Depending on skill requires.
The annular crack width of outer nozzle 3 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1.0mm, specifically
Depending on width can require according to actual process.
The preparation method of 3D printing globular metallic powder of the present invention, can be achieved by the steps of：
It is passed through noble gases, open nozzle 2 and outer nozzle 3；
Molten metal flows into, through ladder catheter 1, the first broken region that inner nozzle 2 is formed, tentatively broken by high velocity air
Continue to drop down after being broken into molten drop；
When molten drop reaches the second broken region that outer nozzle 3 is formed, smashed again by high velocity air, make molten metal
The particle diameter dripping reduces further, after molten drop continues to drop down and leave jeting area, cooled and solidified, and just obtain spherical gold
Belong to powder.
As described above, just can preferably realize the present invention.
Embodiments of the present invention are simultaneously not restricted to the described embodiments, other any spirit without departing from the present invention
With the change made under principle, modification, replacement, combine, simplify, all should be equivalent substitute mode, be included in the present invention's
Within protection domain.
Claims (9)
1. a kind of two-nozzle atomization device preparing 3D printing globular metallic powder is it is characterised in that include：
For containing the bottom pour ladle (4) of molten metal；
It is engaged on the ladder catheter (1) in bottom pour ladle (4) exit；
The lower section in ladder catheter (1) exit be disposed with the distribution annular in shape of multiple circular holes inner nozzle (2) and
The outer nozzle (3) that one annular crack is constituted.
2. prepare the two-nozzle atomization device of 3D printing globular metallic powder according to claim 1 it is characterised in that described
Ladder catheter (1) adopts stepped tapered catheter, a diameter of 8mm～10mm in its upper end, and lower end diameter is 4mm～6mm.
3. according to claim 1 or claim 2 preparation 3D printing globular metallic powder two-nozzle atomization device it is characterised in that
The diameter with diameter greater than inner nozzle (2) of described outer nozzle (3).
4. prepare the two-nozzle atomization device of 3D printing globular metallic powder according to claim 3 it is characterised in that described
Inner nozzle (2) is aerosolization nozzle, and its jet apex angle is 10 °～40 °.
5. prepare the two-nozzle atomization device of 3D printing globular metallic powder according to claim 3 it is characterised in that described
Outer nozzle (3) is aerosolization nozzle, and its jet apex angle is 45 °～60 °.
6. prepare the two-nozzle atomization device of 3D printing globular metallic powder according to claim 3 it is characterised in that described
The import of inner nozzle (2) and outer nozzle (3) is passed through noble gases.
7. prepare the two-nozzle atomization device of 3D printing globular metallic powder according to claim 1 it is characterised in that described
The aperture of circular hole is 1.0～1.5mm.
8. prepare the two-nozzle atomization device of 3D printing globular metallic powder according to claim 1 it is characterised in that described
The annular crack width of outer nozzle (3) is 0.5mm～1.0mm.
9. a kind of preparation method of 3D printing globular metallic powder is it is characterised in that adopt any one of claim 1 to 8
The two-nozzle atomization device of preparation 3D printing globular metallic powder is realized, and it comprises the steps：
Molten metal flows into, through ladder catheter (1), the first broken region that inner nozzle (2) is formed, tentatively broken by high velocity air
Continue to drop down after being broken into molten drop；
When molten drop reaches the second broken region that outer nozzle (3) is formed, smashed again by high velocity air, make molten drop
Particle diameter reduce further, after molten drop continues to drop down and leave jeting area, cooled and solidified, just obtain spherical metal
Powder.
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| CN201611041807.5A CN106378461B (en) | 2016-11-21 | 2016-11-21 | A kind of two-nozzle atomization device and method preparing 3D printing globular metallic powder |
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| CN201611041807.5A CN106378461B (en) | 2016-11-21 | 2016-11-21 | A kind of two-nozzle atomization device and method preparing 3D printing globular metallic powder |
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| CN106378461B CN106378461B (en) | 2019-01-29 |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903321A (en) * | 2017-03-30 | 2017-06-30 | 华南理工大学 | A kind of aerosolization monoblock type dual-nozzle configuration |
| CN107322001A (en) * | 2017-06-19 | 2017-11-07 | 湖南工业大学 | A kind of 3D printing metal dust and its preparation facilities and method |
| CN107377984A (en) * | 2017-09-20 | 2017-11-24 | 中国科学院金属研究所 | A kind of double coupled gas atomizers |
| CN107999775A (en) * | 2017-12-12 | 2018-05-08 | 广州纳联材料科技有限公司 | Apparatus for preparing metal powder and method |
| CN110052620A (en) * | 2019-05-30 | 2019-07-26 | 上海材料研究所 | A kind of free style supersonic speed spray disk for metal powder aerosolization preparation |
| CN110181067A (en) * | 2019-07-08 | 2019-08-30 | 华南理工大学 | A kind of combined type gas-atomized powder equipment |
| CN110434349A (en) * | 2019-08-31 | 2019-11-12 | 嘉兴田然贸易有限公司 | It is a kind of based on penetrate inhale principle atomization of liquid metal nozzle cooling device |
| CN110508826A (en) * | 2019-10-09 | 2019-11-29 | 自贡长城硬面材料有限公司 | A kind of efficient electric arc atomising device and a kind of method for preparing ultra-fine grain diameter metal alloy powders |
| CN111054930A (en) * | 2019-12-24 | 2020-04-24 | 航天海鹰(哈尔滨)钛业有限公司 | Annular inert gas atomizing nozzle |
| CN111375776A (en) * | 2018-12-27 | 2020-07-07 | 丹阳荣鼎金粉科技有限公司 | Swirl atomizing nozzle for crushing high-temperature molten metal |
| CN111975007A (en) * | 2020-08-14 | 2020-11-24 | 中航迈特粉冶科技（北京）有限公司 | Gas atomizing nozzle and atomizing device |
| CN112431701A (en) * | 2020-11-15 | 2021-03-02 | 西北工业大学 | Heavy oil atomizer applied to small and medium-sized unmanned aerial vehicle engine |
| CN112475307A (en) * | 2020-11-26 | 2021-03-12 | 成都慧磁电子材料有限公司 | Method for preparing metal material powder by gas atomization and metal powder atomization device |
| CN112533712A (en) * | 2019-02-04 | 2021-03-19 | 三菱动力株式会社 | Metal powder manufacturing apparatus and gas injector thereof |
| CN113211784A (en) * | 2020-02-05 | 2021-08-06 | 中国科学院福建物质结构研究所 | Workpiece with high sound insulation performance and preparation method thereof based on 3D printing |
| CN113770367A (en) * | 2021-09-16 | 2021-12-10 | 无锡锋速钢丸有限公司 | Atomization equipment and atomization process for producing stainless steel shots |
| CN114226739A (en) * | 2021-12-24 | 2022-03-25 | 湖州慧金材料科技有限公司 | Preparation method of metal powder |
| CN114367668A (en) * | 2022-01-14 | 2022-04-19 | 中航迈特粉冶科技(固安)有限公司 | 3D printing spherical metal powder processing nozzle, method and manufacturing device |
| CN115007868A (en) * | 2022-07-15 | 2022-09-06 | 广东银纳增材制造技术有限公司 | Argon filling method and device in 3d printing powder milling process |
| CN116604023A (en) * | 2023-05-29 | 2023-08-18 | 中航迈特增材科技(北京)有限公司 | Atomizer and preparation method of silver powder for 3D printing |
| CN117139635A (en) * | 2023-10-31 | 2023-12-01 | 江苏贵隆新材料科技有限公司 | Powder metallurgy is with powder process device |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903321A (en) * | 2017-03-30 | 2017-06-30 | 华南理工大学 | A kind of aerosolization monoblock type dual-nozzle configuration |
| CN107322001A (en) * | 2017-06-19 | 2017-11-07 | 湖南工业大学 | A kind of 3D printing metal dust and its preparation facilities and method |
| CN107377984A (en) * | 2017-09-20 | 2017-11-24 | 中国科学院金属研究所 | A kind of double coupled gas atomizers |
| CN107999775A (en) * | 2017-12-12 | 2018-05-08 | 广州纳联材料科技有限公司 | Apparatus for preparing metal powder and method |
| CN111375776A (en) * | 2018-12-27 | 2020-07-07 | 丹阳荣鼎金粉科技有限公司 | Swirl atomizing nozzle for crushing high-temperature molten metal |
| CN112533712A (en) * | 2019-02-04 | 2021-03-19 | 三菱动力株式会社 | Metal powder manufacturing apparatus and gas injector thereof |
| CN110052620A (en) * | 2019-05-30 | 2019-07-26 | 上海材料研究所 | A kind of free style supersonic speed spray disk for metal powder aerosolization preparation |
| CN110181067A (en) * | 2019-07-08 | 2019-08-30 | 华南理工大学 | A kind of combined type gas-atomized powder equipment |
| CN110434349A (en) * | 2019-08-31 | 2019-11-12 | 嘉兴田然贸易有限公司 | It is a kind of based on penetrate inhale principle atomization of liquid metal nozzle cooling device |
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