CN104694922B - A kind of annular ring type laser coaxial powder feeding nozzle - Google Patents
A kind of annular ring type laser coaxial powder feeding nozzle Download PDFInfo
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- CN104694922B CN104694922B CN201510142568.1A CN201510142568A CN104694922B CN 104694922 B CN104694922 B CN 104694922B CN 201510142568 A CN201510142568 A CN 201510142568A CN 104694922 B CN104694922 B CN 104694922B
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Abstract
The invention discloses a kind of annular ring type laser coaxial powder feeding nozzle, including hollow taper nozzle body, the bigger diameter end of taper nozzle body is provided with the branch sleeve that can be connected with laser head, taper nozzle body be provided with four be arranged circumferentially enter powder passage, enter the bigger diameter end of the entrance located at taper nozzle body of powder passage, enter the miner diameter end of the outlet located at taper nozzle body of powder passage, the miner diameter end of taper nozzle body is provided with a hollow annular distance conehead, the end face of annular distance conehead bigger diameter end is provided with annular powder stable chute, annular powder stable chute with enter powder channel connection, the end face of annular distance conehead miner diameter end be provided with it is multiple circumferential it is equally distributed go out powder aperture, go out powder aperture to be connected with annular powder stable chute, the powder stream for respectively going out powder aperture comes together in a bit.The present invention has the advantages that powder stream convergence property is high and remains to obtain uniform powder stream, laser melting coating efficiency high when nozzle is necessarily inclined.
Description
Technical field
The present invention relates to technical field of laser processing, more particularly to a kind of annular ring type laser coaxial powder feeding nozzle.
Background technology
Laser cladding forming（Also referred to as laser-engineering net shaping）It is using laser as processing thermal source, with metal dust as former material
Material, utilizes the increasing material shaping thought of " discrete+to pile up ", and successively cladding on metallic substrates is piled up, so as to form metal parts
Manufacturing technology.With complex shape and good mechanical properties full densified metal components can be directly produced using the technology,
To with complex shape, certain depth manufacturing defect, by mistake processing or the reparation of military service injuring part and can remanufacture.
Laser cladding forming system mainly includes high power laser, guide-lighting and focused light passages system, numerical control device, metal
Powder conveying device, Detection ＆ Controling device etc..Wherein metal dust conveying is a key technology, and it directly affects metal
The quality and efficiency of deposition.Conventional laser cladding forming synchronous powder feeding system mode mainly has lateral powder feeding and coaxial powder-feeding.But side
To powder feeding cannot overcome because laser beam and powder flow field it is asymmetric bring the shortcoming limited scanning direction, so as to limit
Its application on laser cladding forming.
Coaxial powder-feeding powder stream can be coupled with laser coaxial and exported, and effectively overcome the shortcoming of lateral powder feeding.At present,
The coaxial powder-feeding nozzle that laser cladding forming is used mainly has two kinds of forms：Four tubular type coaxial powder-feeding nozzles and conical ring formula are coaxial
Powder-feeding nozzle.It is coaxial that Sandia National Laboratories of the U.S. use four tubular types for the coaxial nozzle of laser near-net-shape technology
Powder-feeding nozzle（United States Patent (USP) U.S.Pat.6046426）, due to dust outlet from substrate distance farther out, be less prone to blocking powder
Passage and nozzle superheating phenomenon, and four road mill diagram pipes are relatively independent, can realize that three-dimensional laser is directly manufactured and remanufactured；But
It is that it is not high that the coaxial powder-feeding nozzle has powder convergence property（Utilization rate is low）, so as to influence deposition efficiency and quality.Germany
Fraunhofer research institutes use circular-gap coaxial powder-feeding nozzle（United States Patent (USP) U.S.Pat.6316744）Led to by optimizing powder
Road structure, greatly improves the utilization rate of powder；But its structure is excessively complicated, and when laser head tilt, especially wide-angle
During inclination, powder occurs segregation under gravity, causes jet expansion powder stream uniformity relatively poor, is had using scope
There is significant limitation.The cellular type coaxial powder-feeding nozzle that South China Science ＆ Engineering University develops（CN 27077773Y）, Tsing-Hua University's use
The Split type coaxial of vertical handling（CN 1255411A）, such powder-feeding nozzle all exists above-mentioned similar
Problem.Existing coaxial powder-feeding nozzle cannot simultaneously meet powder convergence property high and laser three-D application.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, there is provided a kind of simple structure, powder stream are converged
Poly- property is high, remain to obtain uniform powder stream when nozzle is necessarily inclined, the annular ring type laser coaxial of laser melting coating efficiency high send
Powder nozzle.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of annular ring type laser coaxial powder feeding nozzle, including hollow taper nozzle body, the taper nozzle body
Bigger diameter end is provided with the branch sleeve that can be connected with laser head, the taper nozzle body be provided with four be arranged circumferentially enter
Powder passage, it is described enter powder passage entrance located at taper nozzle body bigger diameter end, it is described enter powder passage outlet be located at taper
The miner diameter end of nozzle body, the miner diameter end of the taper nozzle body is provided with a hollow annular distance conehead, and the annular distance conehead is big
The end face at footpath end is provided with annular powder stable chute, the annular powder stable chute with it is described enter powder channel connection, the annular distance
The end face of conehead miner diameter end be provided with it is multiple circumferential it is equally distributed go out powder aperture, it is described go out powder aperture and annular powder stable chute
Connection, it is each it is described go out powder aperture powder stream come together in a bit.
As the further improvement of above-mentioned technical proposal：
Central water collar is provided with the endoporus of the taper nozzle body, the central water collar outer surface is provided with multiple phases
Intercommunicated annular groove, is respectively equipped with cooling water inlet and coolant outlet, the cooling water on the taper nozzle body
Import and coolant outlet are connected with the annular groove.
Sealing ring is provided between the side wall of the endoporus of the central water collar outer surface and the taper nozzle body.
Four protective gas passages being arranged circumferentially are additionally provided with the taper nozzle body, the protective gas leads to
Road with it is described enter powder passage interlaced arrangement, the protective gas passage connects with the endoporus of the taper nozzle body.
It is described go out powder aperture center line and the angle of the taper nozzle body axis be α, 10 °≤α≤30 °.It is described
Go out a diameter of D of powder aperture, quantity is N number of, 0.8mm≤D≤1.5mm, 10≤N≤30.
The annular distance conehead is removably connected by connecting bolt with the miner diameter end of taper nozzle body.
The width of the annular powder stable chute with it is described enter powder passage equal diameters, the annular powder stable chute
Depth is more than 1/2nd of powder aperture hole depth.
The branch sleeve is connected by regulating bolt with the taper nozzle body.
The end face of the taper nozzle body bigger diameter end is provided with an annular mounting groove, and the branch sleeve outer surface is arranged
There is a regulating sleeve, the regulating sleeve is threadedly coupled with the annular mounting groove, the regulating sleeve stretches out the annular peace
The outer surface of tankage is provided with four equally distributed centering screws.
Compared with prior art, the advantage of the invention is that：
（1）Annular ring type laser coaxial powder feeding nozzle of the invention, branch sleeve, taper nozzle body and annular distance conehead it is interior
Hole forms laser beam passway, and the powder stream for respectively going out powder aperture can come together in a bit with laser beam, and powder is reached via powder passage is entered
Annular powder stable chute, after powder is assembled in annular powder stable chute, then goes out the ejection of powder aperture by multiple, and laser beam is passed through
Laser beam passway is pooled a bit with the powder stream for going out the ejection of powder aperture, workpiece is processed, cladding, is repaired and is remanufactured
Deng, powder-feeding nozzle of the invention, using the annular powder stable chute with aggtegation, powder-feeding nozzle is in wide-angle tilt situation
Under, it is obtained in that uniform, small focusing amyloid plaque, the powder stream of high-stiffness, it is ensured that metal dust swashs with focusing in metal deposition process
The abundant effect of light, improves deposition efficiency and precision, effectively overcomes powder-feeding nozzle when high inclination-angle is processed because gravity is made
With and occur powder segregation phenomenon, it is ensured that powder focus on uniformity, improve processing efficiency.
（2）Annular ring type laser coaxial powder feeding nozzle of the invention, using modularized design, the ring with different α angle gauges lattice
Hole conehead is connected by bolt with nozzle body so that the distance between different size annular bit end surface and substrate can be certain
In the range of change so that obtaining different size of powder converges focal spot.
（3）Annular ring type laser coaxial powder feeding nozzle of the invention, branch sleeve is by regulating bolt and taper nozzle body
Connection, can adjust the defocus distance between powder stream focus and laser beam foucing, while can by the length for adjusting regulating bolt
Adjust to both and overlap.
（4）Annular ring type laser coaxial powder feeding nozzle of the invention, regulation centering screw adjustable branch sleeve and laser head
Displacement, overcome processing and installation process in axiality error, realize the adjustment of laser beam and powder stream axiality.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the structural representation of taper nozzle body in the present invention.
Fig. 3 is the top view of Fig. 2.
Each label is represented in figure：
1st, taper nozzle body；11st, cooling water inlet；12nd, coolant outlet；13rd, annular mounting groove；21st, branch sleeve；
22nd, laser head；23rd, laser beam；3rd, powder passage is entered；31st, entrance；4th, annular distance conehead；41st, annular powder stable chute；42nd, powder is gone out small
Hole；5th, central water collar；51st, annular groove；52nd, sealing ring；6th, protective gas passage；61st, gas feed；7th, connecting bolt；
8th, regulating bolt；9th, regulating sleeve；91st, centering screw.
Specific embodiment
The present invention is described in further detail below in conjunction with Figure of description and specific embodiment.
Fig. 1 to Fig. 3 shows a kind of embodiment of annular ring type laser coaxial powder feeding nozzle of the present invention, and the annular ring type laser is same
Axle powder-feeding nozzle, including hollow taper nozzle body 1, the bigger diameter end of taper nozzle body 1 are provided with and can be connected with laser head 22
Branch sleeve 21, taper nozzle body 1 is provided with four entrances 31 for entering powder passage 3, entering powder passage 3 being arranged circumferentially
Located at the bigger diameter end of taper nozzle body 1, enter the miner diameter end of the outlet located at taper nozzle body 1 of powder passage 3, taper nozzle master
The miner diameter end of body 1 is provided with a hollow annular distance conehead 4, and the end face of the bigger diameter end of annular distance conehead 4 is provided with annular powder stable chute 41,
Annular powder stable chute 41 is connected with powder passage 3 is entered, and the end face of the miner diameter end of annular distance conehead 4 is provided with multiple circumferential equally distributed
Go out powder aperture 42, go out powder aperture 42 and connected with annular powder stable chute 41, the powder stream for respectively going out powder aperture 42 comes together in a bit.Cone
The upper end of shape nozzle body 1 is bigger diameter end, and the endoporus of branch sleeve 21, taper nozzle body 1 and annular distance conehead 4 forms laser beam
Passage；Powder reaches annular powder stable chute 41 via powder passage 3 is entered, after powder is assembled in annular powder stable chute 41, then
Go out powder aperture 42 by multiple to spray, laser beam 23 is through laser beam passway and goes out the convergence powder stream coupling that powder aperture 42 sprays
Close, to workpiece（Not shown in figure）It is processed, cladding, repairs and remanufacture.The powder-feeding nozzle of the present embodiment, powder is arrived
Up to after annular powder stable chute 41, powder aperture 42 is listed by multiple circular arrays so that powder-feeding nozzle can be in wide-angle tilt
In the case of, obtain uniform, small focusing amyloid plaque, the powder stream of high-stiffness, it is ensured that metal dust swashs with focusing in metal deposition process
The abundant effect of light, improves deposition efficiency and precision, effectively overcomes powder-feeding nozzle when high inclination-angle is processed because gravity is made
With and occur powder segregation phenomenon, it is ensured that powder focus on uniformity, improve processing efficiency.
In the present embodiment, annular distance conehead 4 is removably connected by connecting bolt 7 with the miner diameter end of taper nozzle body 1,
It is connected by screw bolts, is convenient for changing the annular distance conehead 4 of different size.The lower end of annular distance conehead 4（Miner diameter end）End is designed as edge
The orient diameter of laser beam 23 becomes big cone structure, it is possible to increase the utilization rate of the energy of laser beam 23 and the utilization rate of powder.
In the present embodiment, width and the equal diameters for entering powder passage 3 of annular powder stable chute 41, annular powder stable chute
41 depth is more than 1/2nd of the hole depth of powder aperture 42, be conducive to can be unimpeded into the powder in powder passage 3 entrance ring
Shape powder stable chute 41 is simultaneously assembled, it is ensured that go out the powder collimation and high-stiffness of the ejection of powder aperture 42.
Go out a diameter of D of powder aperture 42, quantity is N number of, wherein, 0.8mm≤D≤1.5mm, 10≤N≤30；Go out powder small
The center line in hole 42 and the angle α of the axis of taper nozzle body 1,10 °≤α≤30 °；Go out the diameter of powder aperture 42 in the present embodiment
D is 0.8mm, goes out the polishing of powder aperture 42, is obtained in that the powder convergent point of a diameter of 2-4mm, goes out the quantity of powder aperture 42
It it is 24, the angle α of the center line and the axis of taper nozzle body 1 that go out powder aperture 42 is 20 °.
In the present embodiment, central water collar 5 is provided with the endoporus of taper nozzle body 1, the outer surface of central water collar 5 is provided with
The interconnected annular groove 51 of multiple, is respectively equipped with cooling water inlet 11 and coolant outlet 12 on taper nozzle body 1, cold
But water inlet 11 and coolant outlet 12 are connected with annular groove 51, and cooling water forms cooling duct in annular groove 51, right
The housing of taper nozzle body 1 is radiated, between the side wall of the endoporus of the outer surface of central water collar 5 and taper nozzle body 1
It is provided with sealing ring 52, it is ensured that water-cooling structure sealed reliable.
In the present embodiment, four protective gas passages 6 being arranged circumferentially are additionally provided with taper nozzle body 1, protected
Gas passage 6 is connected with the interlaced arrangement of powder passage 3, protective gas passage 6 is entered with the endoporus of taper nozzle body 1, protective gas
The gas feed 61 of passage 6 is arranged on the bigger diameter end of taper nozzle body 1, gas feed 61 and the cloth of entrance 31 for entering powder passage 3
Put as shown in figure 3, protective gas is by four road protective gas passages 6, into the inner chamber of taper nozzle body 1, to laser lens
Played a protective role with sedimentary.
In the present embodiment, branch sleeve 21 is connected by regulating bolt 8 with taper nozzle body 1, by regulation spiral shell
The length of bolt 8 can adjust the defocus distance between powder stream focus and the focus of laser beam 23, while be adjustable to both overlapping.
In the present embodiment, the end face of the bigger diameter end of taper nozzle body 1 is provided with an annular mounting groove 13, outside branch sleeve 21
Surface is arranged with a regulating sleeve 9, and regulating sleeve 9 is threadedly coupled with annular mounting groove 13, and regulating sleeve 9 stretches out annular mounting groove
13 outer surface is provided with four equally distributed centering screws 91, and regulation centering screw 91 can adjust branch sleeve 21 and laser
First 22 displacement, realizes the adjustment of laser beam 23 and powder stream axiality, overcomes the error in processing and installation process.
Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention.It is any to be familiar with ability
The technical staff in domain, in the case where technical solution of the present invention scope is not departed from, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible variations and modification, or the Equivalent embodiments for being revised as equivalent variations.Therefore, it is every
Without departing from the content of technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments,
Equivalent variations and modification, all should fall in the range of technical solution of the present invention protection.
Claims (10)
1. a kind of annular ring type laser coaxial powder feeding nozzle, including hollow taper nozzle body（1）, the taper nozzle body
（1）Bigger diameter end be provided with can be with laser head（22）The branch sleeve of connection（21）, the taper nozzle body（1）It is provided with four
What is be arranged circumferentially enters powder passage（3）, it is described enter powder passage（3）Entrance（31）Located at taper nozzle body（1）Big footpath
End, it is described enter powder passage（3）Outlet be located at taper nozzle body（1）Miner diameter end, it is characterised in that：The taper nozzle master
Body（1）Miner diameter end be provided with a hollow annular distance conehead（4）, the annular distance conehead（4）The end face of bigger diameter end is provided with annular powder
Last stable chute（41）, the annular powder stable chute（41）With it is described enter powder passage（3）Connection, the annular distance conehead（4）Path
The end face at end be provided with it is multiple circumferential it is equally distributed go out powder aperture（42）, it is described go out powder aperture（42）With annular powder stable chute
（41）Connection, it is each it is described go out powder aperture（42）Powder stream come together in a bit.
2. annular ring type laser coaxial powder feeding nozzle according to claim 1, it is characterised in that：The taper nozzle body
（1）Endoporus in be provided with central water collar（5）, the central water collar（5）Outer surface be provided with it is multiple be interconnected it is annular recessed
Groove（51）, the taper nozzle body（1）On be respectively equipped with cooling water inlet（11）And coolant outlet（12）, the cooling water
Import（11）And coolant outlet（12）With the annular groove（51）Connection.
3. annular ring type laser coaxial powder feeding nozzle according to claim 2, it is characterised in that：The central water collar（5）
Outer surface and the taper nozzle body（1）Endoporus side wall between be provided with sealing ring（52）.
4. annular ring type laser coaxial powder feeding nozzle according to claim 2, it is characterised in that：The taper nozzle body
（1）On be additionally provided with four protective gas passages being arranged circumferentially（6）, the protective gas passage（6）With it is described enter powder lead to
Road（3）Interlaced arrangement, the protective gas passage（6）With the taper nozzle body（1）Endoporus connection.
5. annular ring type laser coaxial powder feeding nozzle according to any one of claim 1 to 4, it is characterised in that：It is described go out
Powder aperture（42）Center line and the taper nozzle body（1）The angle of axis is α, 10 °≤α≤30 °.
6. annular ring type laser coaxial powder feeding nozzle according to any one of claim 1 to 4, it is characterised in that：It is described go out
Powder aperture（42）A diameter of D, quantity be N number of, 0.8mm≤D≤1.5mm, 10≤N≤30.
7. annular ring type laser coaxial powder feeding nozzle according to any one of claim 1 to 4, it is characterised in that：The ring
Hole conehead（4）By connecting bolt（7）With taper nozzle body（1）Miner diameter end removably connect.
8. annular ring type laser coaxial powder feeding nozzle according to any one of claim 1 to 4, it is characterised in that：The ring
Shape powder stable chute（41）Width with it is described enter powder passage（3）Equal diameters, the annular powder stable chute（41）Depth
Degree is more than powder aperture（42）/ 2nd of hole depth.
9. annular ring type laser coaxial powder feeding nozzle according to any one of claim 1 to 4, it is characterised in that：The company
Female connector cylinder（21）By regulating bolt（8）With the taper nozzle body（1）Connection.
10. annular ring type laser coaxial powder feeding nozzle according to any one of claim 1 to 4, it is characterised in that：The cone
Shape nozzle body（1）The end face of bigger diameter end is provided with an annular mounting groove（13）, the branch sleeve（21）Outer surface is arranged with
One regulating sleeve（9）, the regulating sleeve（9）With the annular mounting groove（13）Threaded connection, the regulating sleeve（9）Stretch out
The annular mounting groove（13）Outer surface be provided with four equally distributed centering screws（91）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510142568.1A CN104694922B (en) | 2015-03-30 | 2015-03-30 | A kind of annular ring type laser coaxial powder feeding nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510142568.1A CN104694922B (en) | 2015-03-30 | 2015-03-30 | A kind of annular ring type laser coaxial powder feeding nozzle |
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| Publication Number | Publication Date |
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| CN104694922A CN104694922A (en) | 2015-06-10 |
| CN104694922B true CN104694922B (en) | 2017-06-13 |
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| CN201510142568.1A Expired - Fee Related CN104694922B (en) | 2015-03-30 | 2015-03-30 | A kind of annular ring type laser coaxial powder feeding nozzle |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3046367A1 (en) * | 2015-12-31 | 2017-07-07 | Nantes Ecole Centrale | DEVICE FOR ADDITIVE MANUFACTURING BY PROJECTION AND POWDER FUSION |
| CN105734560B (en) * | 2016-04-05 | 2018-04-06 | 南京先进激光技术研究院 | The eight road coaxial powder-feeding nozzles for the manufacture of double-deck gradient laser gain material |
| CN107245715B (en) * | 2017-06-12 | 2019-08-20 | 中国矿业大学 | A kind of built-in sieve mesh type loop laser melting-painting nozzle |
| CN108127118A (en) * | 2018-01-19 | 2018-06-08 | 浙江万丰科技开发股份有限公司 | A kind of metal powder laser 3D printing nozzle |
| CN109536957B (en) * | 2019-01-29 | 2024-04-12 | 南京辉锐光电科技有限公司 | Laser cladding nozzle and laser cladding device |
| CN109680274A (en) * | 2019-02-20 | 2019-04-26 | 江苏镭电嘉成激光科技有限公司 | A kind of integral type coaxial powder-feeding nozzle for laser fusion and coating |
| CN110144584A (en) * | 2019-06-04 | 2019-08-20 | 沈阳中科煜宸科技有限公司 | A kind of coaxial three beams powder-feeding nozzle |
| CN110280763A (en) * | 2019-07-18 | 2019-09-27 | 哈尔滨理工大学 | Coaxial powder-feeding laser sintering device |
| CN110923702A (en) * | 2019-12-11 | 2020-03-27 | 陈益航 | Prevent reciprocating type laser cladding machine of vergence |
| CN111441048B (en) * | 2020-04-02 | 2022-03-25 | 佛山根固激光科技有限公司 | Powder feeding device for laser cladding, laser cladding equipment and metal coating processing method |
| CN111996527B (en) * | 2020-08-27 | 2022-03-11 | 东南大学 | Laser cladding head capable of synchronously feeding powder and increasing material in multiple paths |
| CN114086171A (en) * | 2021-10-07 | 2022-02-25 | 江苏大学 | Multi-station coaxial powder feeding type nozzle suitable for ultrahigh-speed laser cladding |
| CN114682805B (en) * | 2022-04-18 | 2023-07-28 | 中国人民解放军32181部队 | Powder feeding nozzle and additive manufacturing method |
| CN116043211A (en) * | 2022-11-30 | 2023-05-02 | 成都青石激光科技有限公司 | Small inner hole laser cladding nozzle |
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| US6396025B1 (en) * | 1999-07-01 | 2002-05-28 | Aeromet Corporation | Powder feed nozzle for laser welding |
| CN2510502Y (en) * | 2001-10-18 | 2002-09-11 | 北京有色金属研究总院 | Laser coating coaxial powder-delivery nozzle |
| CN101024881A (en) * | 2006-02-22 | 2007-08-29 | 通用电气公司 | Nozzle for laser net shape manufacturing |
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|---|---|---|---|---|
| US6396025B1 (en) * | 1999-07-01 | 2002-05-28 | Aeromet Corporation | Powder feed nozzle for laser welding |
| CN2510502Y (en) * | 2001-10-18 | 2002-09-11 | 北京有色金属研究总院 | Laser coating coaxial powder-delivery nozzle |
| CN101024881A (en) * | 2006-02-22 | 2007-08-29 | 通用电气公司 | Nozzle for laser net shape manufacturing |
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