CN2510502Y - Laser coating coaxial powder-delivery nozzle - Google Patents
Laser coating coaxial powder-delivery nozzle Download PDFInfo
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- CN2510502Y CN2510502Y CN01267740U CN01267740U CN2510502Y CN 2510502 Y CN2510502 Y CN 2510502Y CN 01267740 U CN01267740 U CN 01267740U CN 01267740 U CN01267740 U CN 01267740U CN 2510502 Y CN2510502 Y CN 2510502Y
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Abstract
The utility model relates to a laser cladding coaxial powder feeding nozzle, which belongs to metallurgical machinery field. The nozzle is connected with a specular seat via a connection tube which is an adjustable connection tube. The nozzle is a hollow cone, which consists of an upper part, a middle part and a lower part. The upper, the middle and the lower parts are connected and fixed via bolts. A sealing ring is arranged on the sealing end surface of the connection. A protection gas pathway in which the gas is transmitted axially and a powder inlet are arranged on the upper part of the nozzle. A cooling water pathway is arranged on the middle part of the nozzle near the inner wall, and a powder feeding pathway is arranged on the nozzle near the outer wall, which is corresponding with the powder inlet on the upper part. A smooth hole is arranged on the central axis. A powder feeding pathway which is corresponding with the middle part is arranged on the lower tube wall near the inner wall, and a protection gas pathway is arranged near the outer wall, moreover the cooling water pathways surround on the periphery of the outer wall surface. The utility model has the advantages of uniform powder feeding and high cladding quality, and is mainly used for the surface treatment or repair of metal components.
Description
(1) technical field
The utility model relates to a kind of coaxial powder-feeding nozzle that is mainly used in laser melting coating metal or pottery, belongs to field of metallurgical machine.
(2) background technology
At present, in metal parts surface treatment or repair process, often adopt the method for laser melting coating, promptly by the nozzle powder feeding, by laser melting coating, to reach the purpose of improving the metallic surface performance.United States Patent (USP) 4743733 has proposed a kind of method that adopts laser melting coating to repair metal parts; it adopts by nozzle side and carries out laser melting coating to powder feeding; but the side direction powder feeding during to cladding the laser scanning travel direction limit to some extent, simultaneously cladding layer is not had good oxidation protection measure.And United States Patent (USP) 4724299 proposes a kind of laser spraying coaxial powder-feeding nozzle; though focal position of laser and powder focus can be regulated; be connected with water coolant in the nozzle and obtain fine cooling, but powder is difficult in and circumferentially is evenly distributed, and do not have special protection gas in case oxidation.In addition, another patent 5961862 of the U.S. has proposed a kind of laser deposition shower nozzle, though this shower nozzle can be realized the convergence of powder, this shower nozzle is near partly not well cooling of treat surface, the thermal radiation in molten bath in the time of can not standing the long-time continuous use.
(3) technology contents
The utility model designs a kind of coaxial powder-feeding nozzle for laser fusion and coating, and it is rational in infrastructure, and powder circumferentially is evenly distributed, make laser melting coating not the recipient and keep good cooling and cladding layer oxygen-proof property to restriction.
The coaxial powder-feeding nozzle for laser fusion and coating layer that the utility model proposed links to each other with microscope base by connecting cylinder; connecting cylinder is adjustable connecting cylinder; its shape of nozzle is a taper; by top; middle part and bottom are formed; on; in; three parts are connected and fixed by bolt down; have wear ring at the seal face that connects; have the protection gas path and the powdering inlet of axially supplying gas on the top of nozzle; the middle part has cooling water channel near inwall; have the powder feeding path near outer wall; its powdering inlet with top is corresponding; the central axis of bottom has unthreaded hole; have and the corresponding powder feeding path in middle part near the inwall place in the tube wall of bottom, have auxiliary protection gas passage near outer wall, and the outside wall surface periphery is surrounded with cooling water channel.
The powder feeding through hole is circumferentially uniform along nozzle, can form by 4 or 8.
The angle of powder feeding through hole and conical cavity and nozzle axis is between 10 °～40 °, and the aperture of powder feeding through hole is in 1～3mm scope.
The conical cavity of nozzle can be regulated in 0.5～2mm scope by adjusting part.
Nozzle upper axial protection airshed is not more than 200l/h, is polluted to prevent condensing lens.
The utility model coaxial powder-feeding nozzle for laser fusion and coating is when using; light beam is injected along the central shaft of nozzle; can regulate the relative position of laser spot and powder convergent point by connecting cylinder; gas carry powder through multichannel through hole and conical cavity deliver in the laser beam with assembling back and laser coaxial or laser in the molten bath of substrate material surface formation; be connected with protection gas in powder channel outlet periphery; can prevent the oxidation of cladding layer; nozzle middle part and nozzle bottom all are connected with cooling water channel nozzle are fully cooled off; and nozzle top has along beam axis to the protection gas that feeds, and can prevent the pollution of powder backwash to condensing lens.
Coaxial powder-feeding nozzle for laser fusion and coating of the present utility model can be realized coaxial powder-feeding, and has cooling system preferably, is guaranteeing to prevent the powder backwash under the uniform situation of powder feeding, to prolong the application time of nozzle, improves metallic surface cladding layer quality.
(4) description of drawings
Fig. 1 is the structure iron of the designed coaxial powder-feeding nozzle for laser fusion and coating of the utility model.
Fig. 2 is the A-A view on nozzle top among Fig. 1.
Fig. 3 is the B-B view on nozzle top among Fig. 2.
Fig. 4 is the water route synoptic diagram at nozzle middle part among Fig. 1.
Fig. 5 is a nozzle substructure synoptic diagram among Fig. 1.
Fig. 6 is the D-D view of Fig. 5.
(5) embodiment
Coaxial powder-feeding nozzle for laser fusion and coating 10 is as shown in Figure 1 fixedlyed connected with microscope base 11 by connecting cylinder 12.Connecting cylinder 12 is adjustable connecting cylinder, can be used for regulating the relative position of laser focusing point and powder convergent point, and nozzle 10 is shaped as the conical ring shape, wherein forms conical cavity.Nozzle 10 is made up of top, middle part and bottom, and top is made of assembly 1 shown in Fig. 2,3, and its ring wall has protection gas path 20, powdering inlet 122, water coolant port 121; The middle part is by assembly 2 and assembly 2 ' constitute; assembly 2 ' weld with assembly 2; form middle part cooling water channel 22; as shown in Figure 4; cooling water channel 22 is connected with top water coolant port 121; it has powder feeding path H near outer wall; be connected with bolt between assembly 1 and the assembly 2; bottom such as Fig. 5; shown in 6, by assembly 3; assembly 4; assembly 5; 5 '; 5 " constitute assembly 5; 5 '; 5 " the employing welding process is fixed as one; form protection gas path 21 and cooling water channel 23; and assembly 3 and assembly 4; for being threaded, form powder feeding path C between assembly 3 and the assembly 5, this structure helps the maintenance and the part replacement of nozzle.
Need high energy density during laser melting coating, light beam need be through the focusing of condensing lens, being difficult to that gas is carried powder delivers in the laser molten pool fully, under the situation for different powder and powder feeding rate, the convergence situation of powder is not exclusively the same, this just requires the relative powder convergent point of laser spot suitably to regulate, and realizes this purpose by the adjustable connecting cylinder 12 between microscope base 11 and the nozzle 10 in this nozzle, and nozzle is applicable to the condensing lens of 100～300mm.
During powder-feeding laser melting-painting; there is the through hole that passes through for light beam at nozzle 10 centers; the backwash of powder can cause the pollution to condensing lens during cladding; even more serious when adopting short burnt (burnt long) condensing lens as 100mm; can feed axial shielding gas (120 among Fig. 2 feeds mouth for axially protecting gas on the top of nozzle 10; shielding gas enters nozzle chamber through protection gas path 20, flows out from beam outlet), polluted to prevent condensing lens.Axially the protection airshed should be controlled in the 200l/h, in order to avoid influence the convergence of powder.
The introducing of powder is asymmetric during in the past side direction powder feeding, thereby the scanning motion direction is limited to some extent, and this nozzle 10 and laser coaxial, powder is tested and appraised.Carrier gas (nitrogen or argon gas) is delivered to powder feeding path H (through-hole diameter 1～3mm through powdering inlet 122, angle θ is at 10～40 °), via delivering among laser beam 0 and the laser molten pool M after the conical cavity C convergence that forms between assembly 4 and 5, the big I of conical cavity C is regulated (cone angle is at 10～40 °) by adjusting part 4 and assembly 5 between 0.5～2mm, the adjusting carrier gas flux and the powder sending quantity of joining can change the flight velocity of powder.
Bath temperature is up to 3000 ℃ during laser melting coating, the molten bath has very strong photothermy to nozzle 10, long time continuous working can cause the scaling loss of nozzle, therefore at nozzle 10 middle parts and the bottom design cooling-water duct is arranged, 121 is inner water coolant port among Fig. 2, and 22 is inner cooling water channel among Fig. 4.23 is the cooling water channel of nozzle bottom among Fig. 5.This nozzle can stand long time continuous working.
Usually carrying the gas of powder is rare gas element (as argon gas or nitrogen), but the oxidation of carrier gas material can not effectively prevent cladding time the itself, so designs of nozzles has special auxiliary protection gas passage, in the interaction region of laser and material feeding inert protective gas.Protection gas is fed by the protection gas path among Fig. 5 21, along circumferentially disperseing after-blow to M periphery, molten bath, to prevent the oxidation of cladding layer.
Consider absorption, processibility, welding and the thermal conductivity of material for laser light, the manufactured materials of this nozzle can use red copper or H62 brass (copper is high to the reflectivity of laser, and thermal conductivity is splendid, and is easy to processing and welding).For example: the coaxial powder-feeding nozzle for laser fusion and coating that adopts the H62 brass material; powder feeding path H and beam axis are to 40 ° of angles; through-hole diameter 2.8mm; powder convergence conical cavity and beam axis are to 15 ° of angles; cavity size 1.5mm (can regulate); assembly 5 is of a size of 8mm bottom; axially protect gas (argon gas) flow 100L/h; the used powder of cladding is 316L Stainless Steel Powder (powder size-200～+ 400 orders); powder feeding rate 5～8g/min; powder feeding gas (nitrogen) flow 300L/h, auxiliary protection gas (nitrogen) 400L/h adopts CO
2Laser (used power 800W) is 45
#The cladding test is carried out on the steel surface, and the result shows that nozzle proposed by the invention can satisfy laser cladding coaxial powder feeding requirement, and the cladding layer surface quality meets the requirements.
Claims (5)
1. coaxial powder-feeding nozzle for laser fusion and coating; this nozzle links to each other with microscope base by connecting cylinder; it is characterized in that: connecting cylinder is adjustable connecting cylinder; its shape of nozzle is the taper of hollow; by top; middle part and bottom are formed; on; in; three parts are connected and fixed by bolt down; have wear ring at the seal face that connects; have the protection gas path and the powdering inlet of axially supplying gas on the top of nozzle; the middle part has cooling water channel near inwall; have the powder feeding path near outer wall; its powdering inlet with top is corresponding, and the central axis of bottom has unthreaded hole, has and the corresponding powder feeding path in middle part near the inwall place in the tube wall of bottom; have protection gas passage near outer wall, and the outside wall surface periphery is surrounded with cooling water channel.
2. according to the described coaxial powder-feeding nozzle for laser fusion and coating of claim l, it is characterized in that: the powder feeding through hole is circumferentially uniform along nozzle, can form by 4 or 8.
3. according to claim l or 2 described coaxial powder-feeding nozzle for laser fusion and coating, it is characterized in that: the angle of dust through hole and conical cavity and nozzle axis is between 10 °～40 °, and the aperture is in 1～3mm scope.
4. according to the described coaxial powder-feeding nozzle for laser fusion and coating of claim l, it is characterized in that: the conical cavity of nozzle can be regulated in 0.5～2mm scope by adjusting part.
5. coaxial powder-feeding nozzle for laser fusion and coating according to claim 1 is characterized in that: nozzle upper axial protection airshed is not more than 200l/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01267740U CN2510502Y (en) | 2001-10-18 | 2001-10-18 | Laser coating coaxial powder-delivery nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01267740U CN2510502Y (en) | 2001-10-18 | 2001-10-18 | Laser coating coaxial powder-delivery nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN2510502Y true CN2510502Y (en) | 2002-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01267740U Ceased CN2510502Y (en) | 2001-10-18 | 2001-10-18 | Laser coating coaxial powder-delivery nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2510502Y (en) |
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408250C (en) * | 2005-11-25 | 2008-08-06 | 北京工业大学 | Side shaft powder feeding apparatus based on laser powder filling welding and powder feeding method |
| CN100436031C (en) * | 2005-12-27 | 2008-11-26 | 苏州大学 | Laser precision coated powder coaxial device |
| CN101158040B (en) * | 2007-11-09 | 2010-06-02 | 燕山大学 | Coaxial powder feeding apparatus |
| CN101264519B (en) * | 2008-04-08 | 2010-06-16 | 西安交通大学 | Adjustable laser coaxial powder feeding nozzle |
| CN101372742B (en) * | 2007-08-20 | 2010-06-16 | 沈阳大陆激光成套设备有限公司 | Transmission coaxial focusing power feed head |
| CN101342640B (en) * | 2007-07-11 | 2010-10-27 | 中国科学院沈阳自动化研究所 | Coaxial powder feeding system for quickly molding and producing functional gradient material with laser |
| CN101942659A (en) * | 2010-09-28 | 2011-01-12 | 华南理工大学 | Laser cladding nozzle convenient for cooling and manufacturing method thereof |
| CN102039488A (en) * | 2009-10-14 | 2011-05-04 | 上海团结普瑞玛激光设备有限公司 | Coaxial powder-feeding laser-cladding processing head |
| CN102061467A (en) * | 2010-11-02 | 2011-05-18 | 中国石油大学(华东) | Adjustable laser coaxial powder-feeding nozzle |
| CN103526147A (en) * | 2013-10-21 | 2014-01-22 | 芜湖鼎恒材料技术有限公司 | No-water cut-off protection system for plasma spraying equipment |
| CN104249556A (en) * | 2013-06-27 | 2014-12-31 | 田珉 | 3D product printer and program-controlled path |
| CN104593768A (en) * | 2015-01-30 | 2015-05-06 | 江苏中科四象激光科技有限公司 | Optical-fiber laser coaxial powder-feeding nozzle |
| CN104694922A (en) * | 2015-03-30 | 2015-06-10 | 湖南大学 | Ring hole type laser coaxial powder feeding nozzle |
| CN105499904A (en) * | 2016-01-04 | 2016-04-20 | 湘潭大学 | Part repairing device based on additive and decreasing manufacturing and application method of part repairing device |
| CN105734560A (en) * | 2016-04-05 | 2016-07-06 | 南京先进激光技术研究院 | Eight-way coaxial powder feeding nozzle for double-layer gradient laser material increase manufacturing |
| CN106319514A (en) * | 2016-10-20 | 2017-01-11 | 西北工业大学 | Turbulence-thread rotational flow water-cooling device used for laser cladding nozzle |
| CN106400005A (en) * | 2016-10-20 | 2017-02-15 | 西北工业大学 | Turbulence protruding channel water cooling device used for laser cladding spray nozzle |
| CN106400004A (en) * | 2016-10-20 | 2017-02-15 | 西北工业大学 | Spiral micro-fin water cooling device for laser cladding nozzle |
| CN106435578A (en) * | 2016-11-23 | 2017-02-22 | 哈尔滨工业大学 | Multi-beam coaxial powder feeding type laser cladding nozzle with water cooling protection function |
| CN106521484A (en) * | 2016-10-20 | 2017-03-22 | 西北工业大学 | Multi-level ribbed channel water-cooling device used for laser cladding sprayer |
| CN107511587A (en) * | 2016-06-17 | 2017-12-26 | 宝山钢铁股份有限公司 | A kind of laser gain material roughing method |
| CN107587132A (en) * | 2017-10-19 | 2018-01-16 | 西安中科中美激光科技有限公司 | A kind of multifunctional coaxial powder feeding high-rate laser spray equipment and application |
| 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 |
| CN110055528A (en) * | 2019-05-23 | 2019-07-26 | 西安交通大学 | A kind of annular coaxial dust feeder for ultrahigh speed laser melting coating |
| CN110424011A (en) * | 2019-09-06 | 2019-11-08 | 武汉洛克斯模具技术有限公司 | A kind of laser coating and powder feeding device |
| CN110952089A (en) * | 2019-12-20 | 2020-04-03 | 西安交通大学 | Slit type powder feeding head |
| CN110952087A (en) * | 2019-12-20 | 2020-04-03 | 西安交通大学 | Coaxial powder feeding head for ultra-high-speed laser cladding process |
| CN110952088A (en) * | 2019-12-20 | 2020-04-03 | 西安交通大学 | Coaxial powder feeding device |
| CN112126924A (en) * | 2020-08-26 | 2020-12-25 | 东南大学 | Laser cladding coaxial powder feeding nozzle with outer shielding gas structure |
| CN112122807A (en) * | 2020-09-22 | 2020-12-25 | 安徽中科春谷激光产业技术研究院有限公司 | Annular nozzle for laser and method thereof |
| CN112553620A (en) * | 2020-12-08 | 2021-03-26 | 上海交通大学 | Gas protection cover device for laser cladding coaxial powder feeding gun |
| CN113226627A (en) * | 2018-12-28 | 2021-08-06 | Addup公司 | Powder injection 3D printing head |
| CN110952089B (en) * | 2019-12-20 | 2024-05-28 | 西安交通大学 | Slit type powder feeding head |
-
2001
- 2001-10-18 CN CN01267740U patent/CN2510502Y/en not_active Ceased
Cited By (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408250C (en) * | 2005-11-25 | 2008-08-06 | 北京工业大学 | Side shaft powder feeding apparatus based on laser powder filling welding and powder feeding method |
| CN100436031C (en) * | 2005-12-27 | 2008-11-26 | 苏州大学 | Laser precision coated powder coaxial device |
| CN101342640B (en) * | 2007-07-11 | 2010-10-27 | 中国科学院沈阳自动化研究所 | Coaxial powder feeding system for quickly molding and producing functional gradient material with laser |
| CN101372742B (en) * | 2007-08-20 | 2010-06-16 | 沈阳大陆激光成套设备有限公司 | Transmission coaxial focusing power feed head |
| CN101158040B (en) * | 2007-11-09 | 2010-06-02 | 燕山大学 | Coaxial powder feeding apparatus |
| CN101264519B (en) * | 2008-04-08 | 2010-06-16 | 西安交通大学 | Adjustable laser coaxial powder feeding nozzle |
| CN102039488A (en) * | 2009-10-14 | 2011-05-04 | 上海团结普瑞玛激光设备有限公司 | Coaxial powder-feeding laser-cladding processing head |
| CN102039488B (en) * | 2009-10-14 | 2013-08-28 | 上海团结普瑞玛激光设备有限公司 | Coaxial powder-feeding laser-cladding processing head |
| CN101942659A (en) * | 2010-09-28 | 2011-01-12 | 华南理工大学 | Laser cladding nozzle convenient for cooling and manufacturing method thereof |
| CN102061467A (en) * | 2010-11-02 | 2011-05-18 | 中国石油大学(华东) | Adjustable laser coaxial powder-feeding nozzle |
| CN104249556A (en) * | 2013-06-27 | 2014-12-31 | 田珉 | 3D product printer and program-controlled path |
| CN103526147A (en) * | 2013-10-21 | 2014-01-22 | 芜湖鼎恒材料技术有限公司 | No-water cut-off protection system for plasma spraying equipment |
| CN103526147B (en) * | 2013-10-21 | 2015-07-08 | 芜湖鼎恒材料技术有限公司 | No-water cut-off protection system for plasma spraying equipment |
| CN104593768A (en) * | 2015-01-30 | 2015-05-06 | 江苏中科四象激光科技有限公司 | Optical-fiber laser coaxial powder-feeding nozzle |
| CN104694922A (en) * | 2015-03-30 | 2015-06-10 | 湖南大学 | Ring hole type laser coaxial powder feeding nozzle |
| CN104694922B (en) * | 2015-03-30 | 2017-06-13 | 湖南大学 | A kind of annular ring type laser coaxial powder feeding nozzle |
| CN105499904A (en) * | 2016-01-04 | 2016-04-20 | 湘潭大学 | Part repairing device based on additive and decreasing manufacturing and application method of part repairing device |
| CN105499904B (en) * | 2016-01-04 | 2017-12-08 | 湘潭大学 | A kind of part prosthetic device and its application method based on increase and decrease material manufacture |
| CN105734560A (en) * | 2016-04-05 | 2016-07-06 | 南京先进激光技术研究院 | Eight-way coaxial powder feeding nozzle for double-layer gradient laser material increase manufacturing |
| 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 |
| CN107511587A (en) * | 2016-06-17 | 2017-12-26 | 宝山钢铁股份有限公司 | A kind of laser gain material roughing method |
| CN106319514B (en) * | 2016-10-20 | 2018-11-09 | 西北工业大学 | A kind of flow-disturbing screw thread eddy flow water cooling plant for laser melting coating nozzle |
| CN106521484B (en) * | 2016-10-20 | 2018-11-20 | 西北工业大学 | A kind of multistage channel water-cooling device with ribbing for laser melting coating spray head |
| CN106400004A (en) * | 2016-10-20 | 2017-02-15 | 西北工业大学 | Spiral micro-fin water cooling device for laser cladding nozzle |
| CN106400005A (en) * | 2016-10-20 | 2017-02-15 | 西北工业大学 | Turbulence protruding channel water cooling device used for laser cladding spray nozzle |
| CN106521484A (en) * | 2016-10-20 | 2017-03-22 | 西北工业大学 | Multi-level ribbed channel water-cooling device used for laser cladding sprayer |
| CN106400004B (en) * | 2016-10-20 | 2018-11-09 | 西北工业大学 | A kind of micro- rib water cooling plant of spiral for laser melting coating nozzle |
| CN106319514A (en) * | 2016-10-20 | 2017-01-11 | 西北工业大学 | Turbulence-thread rotational flow water-cooling device used for laser cladding nozzle |
| CN106400005B (en) * | 2016-10-20 | 2018-11-13 | 西北工业大学 | A kind of flow-disturbing embossed channel water cooling plant for laser melting coating nozzle |
| CN106435578A (en) * | 2016-11-23 | 2017-02-22 | 哈尔滨工业大学 | Multi-beam coaxial powder feeding type laser cladding nozzle with water cooling protection function |
| CN106435578B (en) * | 2016-11-23 | 2018-10-30 | 哈尔滨工业大学 | A kind of multi-beam coaxial powder-feeding formula laser melting-painting nozzle with water cooling protection |
| CN107587132A (en) * | 2017-10-19 | 2018-01-16 | 西安中科中美激光科技有限公司 | A kind of multifunctional coaxial powder feeding high-rate laser spray equipment and application |
| 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 |
| CN113226627A (en) * | 2018-12-28 | 2021-08-06 | Addup公司 | Powder injection 3D printing head |
| CN110055528A (en) * | 2019-05-23 | 2019-07-26 | 西安交通大学 | A kind of annular coaxial dust feeder for ultrahigh speed laser melting coating |
| CN110424011A (en) * | 2019-09-06 | 2019-11-08 | 武汉洛克斯模具技术有限公司 | A kind of laser coating and powder feeding device |
| CN110952089A (en) * | 2019-12-20 | 2020-04-03 | 西安交通大学 | Slit type powder feeding head |
| CN110952087A (en) * | 2019-12-20 | 2020-04-03 | 西安交通大学 | Coaxial powder feeding head for ultra-high-speed laser cladding process |
| CN110952088A (en) * | 2019-12-20 | 2020-04-03 | 西安交通大学 | Coaxial powder feeding device |
| CN110952089B (en) * | 2019-12-20 | 2024-05-28 | 西安交通大学 | Slit type powder feeding head |
| CN112126924A (en) * | 2020-08-26 | 2020-12-25 | 东南大学 | Laser cladding coaxial powder feeding nozzle with outer shielding gas structure |
| CN112122807A (en) * | 2020-09-22 | 2020-12-25 | 安徽中科春谷激光产业技术研究院有限公司 | Annular nozzle for laser and method thereof |
| CN112553620A (en) * | 2020-12-08 | 2021-03-26 | 上海交通大学 | Gas protection cover device for laser cladding coaxial powder feeding gun |
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