CN202786434U - Spray nozzle capable of improving laser cladding effect - Google Patents
Spray nozzle capable of improving laser cladding effect Download PDFInfo
- Publication number
- CN202786434U CN202786434U CN 201220429501 CN201220429501U CN202786434U CN 202786434 U CN202786434 U CN 202786434U CN 201220429501 CN201220429501 CN 201220429501 CN 201220429501 U CN201220429501 U CN 201220429501U CN 202786434 U CN202786434 U CN 202786434U
- Authority
- CN
- China
- Prior art keywords
- shower nozzle
- shielding gas
- laser
- adding set
- mixed gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Laser Beam Processing (AREA)
Abstract
The utility model discloses a spray nozzle capable of improving the laser cladding effect, which includes a laser channel arranged in the center of the spray nozzle, a first protective gas channel formed on the periphery of the laser channel, and a second protective gas channel formed on the periphery of a powder channel, wherein one end of the protective gas channel is connected with a mixed gas adding device, the second protective gas channel is connected with a high pressure nitrogen adding device, the mixed gas is the mixture of helium and nitrogen, and the volume of helium accounts for 45%-55% of the total volume of the mixed gas. The utility model provides another technical scheme as follows: the spray nozzle capable of improving the laser cladding effect is provided with the laser channel formed in the center of the spray nozzle, a first protective gas inlet formed on the spray nozzle and communicated with the laser channel, and the second protective gas channel formed on the periphery a powder channel, wherein one end of the first protective gas inlet is connected with the mixed gas adding device.
Description
Technical field
The utility model relates to a kind of shower nozzle that improves the laser melting coating effect, belongs to field of laser cladding.
Background technology
Laser melting coating is the superlaser surface cladding, its physical process is that under the irradiation of High energy laser beam, substrate surface is melted rapidly, liquid metal forms a small-scale molten bath, in this molten bath, metallic substance originally mixes mutually with the powder that is added, and forms the new liquid-metal layer of one deck, treat after the laser beam process, the temperature in molten bath reduces, and liquid metal cools off rapidly, forms the new solid-state cladding layer of one deck in the metallic surface.Laser melting coating can change the metallicity of this key position greatly, such as hardness, wear resistance, thermotolerance, erosion resistance etc.
For preventing at high temperature oxidation of metal, design protection gas passage in the cladding shower nozzle, injecting protective gas when carrying out laser melting coating, it is not oxidized with the protection metal to form the shielding gas field.Only use single a kind of shielding gas in the prior art, though tool has certain effect, the cladding layer air spots is sliding, is full of pore, and because surface tension is inadequate, there is collapse phenomenon on the cladding surface.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of method and shower nozzle for improving the laser melting coating effect.
In order to reach above purpose; the technical solution adopted in the utility model is: a kind of shower nozzle that improves the laser melting coating effect, and it has the laser channeling that is opened in these shower nozzle central authorities; be opened in a end around the laser channeling the other end that is connected with a kind of shielding gas adding set and run through the first shielding gas passage of shower nozzle bottom surface; an end that is opened in the first shielding gas passage periphery the other end that is connected with the powder adding set runs through the powder channel of shower nozzle bottom surface; an end that is opened in the powder channel periphery the other end that is connected with another kind of shielding gas adding set runs through the second shielding gas passage of shower nozzle bottom surface.
Preferably; one end of the first shielding gas passage is connected with the mixed gas adding set; the second shielding gas passage is connected with the high pressure nitrogen adding set, and mixed gas is the mixed gas of helium and nitrogen, and wherein the volume of helium accounts for 50% ± 5% of mixed gas cumulative volume.
More preferably, the first shielding gas passage has a plurality of, and evenly distributes around the central shaft of laser channeling; The second shielding gas passage has a plurality of, and evenly distributes around the central shaft of laser channeling.
Another technical scheme provided by the utility model is: a kind of shower nozzle that improves the laser melting coating effect, it has the laser channeling that is opened in these shower nozzle central authorities, be opened in an end on the shower nozzle be connected with a kind of shielding gas adding set the first gas atmosphere inlet that the other end laser channeling is connected, be opened in a end around the laser channeling the other end that is connected with the powder adding set and run through the powder channel of shower nozzle bottom surface, the end that is opened in the powder channel periphery the other end that is connected with another kind of shielding gas adding set and run through the second shielding gas passage of shower nozzle bottom surface.
Preferably; one end of the first gas atmosphere inlet is connected with the mixed gas adding set; the second shielding gas passage is connected with the high pressure nitrogen adding set, and mixed gas is the mixed gas of helium and nitrogen, and wherein the volume of helium accounts for 50% ± 5% of mixed gas cumulative volume.
More preferably, the first gas atmosphere inlet and laser channeling connection in the vertical direction apart from the shower nozzle bottom surface more than or equal to 5cm.
More preferably, the first gas atmosphere inlet has a plurality of, and evenly distributes around the central shaft of laser channeling; The second shielding gas passage has a plurality of, and evenly distributes around the central shaft of laser channeling.
Owing to adopted technique scheme; the utility model improves method and the shower nozzle of laser melting coating effect; in the shower nozzle indoor design multiple protective gas passage; can in cladding, use the shielding gas of multiple heterogeneity, different air pressure; improve quality of cladding layer; reduce crackle, shrinkage porosite, shrinkage cavity, improve cladding layer compactness.
Description of drawings
Accompanying drawing 1 is the structural representation of shower nozzle among the utility model embodiment one;
Accompanying drawing 2 is the structural representation of shower nozzle among the utility model embodiment two.
Wherein:
1, shower nozzle; 2, laser channeling; 3, powder channel; 4, the first shielding gas passage; 5, the second shielding gas passage; 6, laser beam; 7, treat the cladding workpiece; 8, cladding layer; 9, the first gas atmosphere inlet.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection domain of the present utility model is made more explicit defining.
Present embodiment provides a kind of method that improves the laser melting coating effect; when laser melting coating; when laser melting coating; a passage at shower nozzle passes into the mixed gas of helium and nitrogen as shielding gas; another passage at shower nozzle passes into high pressure nitrogen simultaneously as shielding gas, and mixed gas and high pressure nitrogen spray from shower nozzle simultaneously.The air pressure of mixed gas is lower than the air pressure of high pressure nitrogen.In the present embodiment, the air pressure of mixed gas is 1.5～2 normal atmosphere, and the air pressure of high pressure nitrogen is 3～5 normal atmosphere.
Nitrogen is more cheap, but can only prevent oxidation, and anti-oxidant function is not as helium.Helium not only can be anti-oxidant, and inertia is stronger, can prevent other reactions of metal-powder, but expensive.
The protective value of helium is stronger than nitrogen, but finds through contrast, in the mixed gas of nitrogen and helium, if the volume ratio of helium more than 20%, the protective value of this mixed gas and pure helium are very approaching, economy is very strong.
In the present embodiment, in the mixed gas, the volume of helium accounts for 50% ± 5% of mixed gas cumulative volume, and the volume ratio of mixed gas and high pressure nitrogen is greater than 1:3.
Another technical scheme that present embodiment provides is: a kind of shower nozzle of the method for above-mentioned raising laser melting coating effect; as shown in Figure 1, it has the laser channeling 2 that is opened in these shower nozzle 1 central authorities; be opened in a end around the laser channeling 2 the other end that is connected with a kind of shielding gas adding set and run through the first shielding gas passage 4 of shower nozzle 1 bottom surface; an end that is opened in the first shielding gas passage 4 peripheries the other end that is connected with the powder adding set runs through the powder channel 3 of shower nozzle 1 bottom surface; an end that the is opened in powder channel 3 peripheries the other end that is connected with another kind of shielding gas adding set runs through the second shielding gas passage 5 of shower nozzle 1 bottom surface.
The first shielding gas passage 4 has a plurality of, and evenly distributes around the central shaft of laser channeling 2; The second shielding gas passage 5 has a plurality of, and evenly distributes around the central shaft of laser channeling 2.
One end of the first shielding gas passage 4 is connected with the mixed gas adding set; mixed gas sprays between laser and powder; help to strengthen the homogeneity in powder flow field; the second shielding gas passage 5 is connected with the high pressure nitrogen adding set; high pressure nitrogen helps to strengthen centrality and the convergency in powder flow field in the peripheral ejection of powder.Mixed gas is the mixed gas of helium and nitrogen, and wherein the volume of helium accounts for 50% ± 5% of mixed gas cumulative volume.Need to prove that helium and nitrogen can mix first, pass into again the first shielding gas passage 4 after being mixed into mixed gas, also helium and nitrogen can be passed into respectively 4, two kinds of gases of the first shielding gas passage and after the shower nozzle ejection, mix.
The size at the place, gas inlet of each first shielding gas passage 4 and the second shielding gas passage 5 is greater than the size of gas outlet, the pressure when ejecting from shower nozzle with increase gas.
Cladding layer surface smoothing under kinds of protect gas covers, without hole and crackle, surface tension is enough, and cladding layer central authorities shrink, and meet the cladding height requirement.
Embodiment two
The difference of present embodiment and embodiment one is: a kind of shower nozzle of the method for above-mentioned raising laser melting coating effect; as shown in Figure 2, it has the laser channeling 2 that is opened in these shower nozzle 1 central authorities; be opened in the first gas atmosphere inlet 9 that the other end laser channeling 2 is connected that is connected with a kind of shielding gas adding set of an end on the shower nozzle 1; be opened in a end around the laser channeling 2 the other end that is connected with the powder adding set and run through the powder channel 3 of shower nozzle 1 bottom surface; an end that the is opened in powder channel 3 peripheries the other end that is connected with another kind of shielding gas adding set runs through the second shielding gas passage 5 of shower nozzle 1 bottom surface.
One end of the first gas atmosphere inlet 9 is connected with the mixed gas adding set, and the second shielding gas passage 5 is connected with the high pressure nitrogen adding set.
The first gas atmosphere inlet 9 with laser channeling 2 connection in the vertical directions apart from shower nozzle 1 bottom surface more than or equal to 5cm; to guarantee that shielding gas forms the stable mobile wind of wind direction within it before the centre gangway ejection; and then guarantee that powder do not rushed in centre gangway, also can guarantee that shielding gas fully mixes with powder simultaneously after central channel injection goes out.
The first gas atmosphere inlet 9 has a plurality of, and evenly distributes around the central shaft of laser channeling 2; The second shielding gas passage 5 has a plurality of, and evenly distributes around the central shaft of laser channeling 2.
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (4)
1. shower nozzle that improves the laser melting coating effect; it is characterized in that: it has the laser channeling (2) that is opened in this shower nozzle (1) central authorities; be opened in described laser channeling (a 2) the end on every side the other end that is connected with a kind of shielding gas adding set and run through the first shielding gas passage (4) of shower nozzle (1) bottom surface; be opened in the peripheral end of described the first shielding gas passage (4) the other end that is connected with the powder adding set and run through the powder channel (3) of described shower nozzle (1) bottom surface; be opened in the peripheral end of described powder channel (3) the other end that is connected with another kind of shielding gas adding set and run through the second shielding gas passage (5) of shower nozzle (1) bottom surface; one end of described the first shielding gas passage (4) is connected with the mixed gas adding set; described the second shielding gas passage (5) is connected with the high pressure nitrogen adding set; described mixed gas is the mixed gas of helium and nitrogen, and wherein the volume of helium accounts for 50% ± 5% of mixed gas cumulative volume.
2. shower nozzle according to claim 1, it is characterized in that: described the first shielding gas passage (4) has a plurality of, and evenly distributes around the central shaft of laser channeling (2); Described the second shielding gas passage (5) has a plurality of, and evenly distributes around the central shaft of laser channeling (2).
3. shower nozzle that improves the laser melting coating effect; it is characterized in that: it has the laser channeling (2) that is opened in this shower nozzle (1) central authorities; be opened in the upper end of described shower nozzle (1) the first gas atmosphere inlet (9) that the described laser channeling of the other end (2) is connected that is connected with a kind of shielding gas adding set; be opened in described laser channeling (a 2) the end on every side the other end that is connected with the powder adding set and run through the powder channel (3) of described shower nozzle (1) bottom surface; be opened in the peripheral end of described powder channel (3) the other end that is connected with another kind of shielding gas adding set and run through the second shielding gas passage (5) of shower nozzle (1) bottom surface; one end of described the first gas atmosphere inlet (9) is connected with the mixed gas adding set; described the second shielding gas passage (5) is connected with the high pressure nitrogen adding set; described mixed gas is the mixed gas of helium and nitrogen, and wherein the volume of helium accounts for 50% ± 5% of mixed gas cumulative volume.
4. shower nozzle according to claim 3 is characterized in that: described the first gas atmosphere inlet (9) with laser channeling (2) connection in the vertical direction apart from shower nozzle (1) bottom surface more than or equal to 5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220429501 CN202786434U (en) | 2012-08-29 | 2012-08-29 | Spray nozzle capable of improving laser cladding effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220429501 CN202786434U (en) | 2012-08-29 | 2012-08-29 | Spray nozzle capable of improving laser cladding effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202786434U true CN202786434U (en) | 2013-03-13 |
Family
ID=47813732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220429501 Expired - Lifetime CN202786434U (en) | 2012-08-29 | 2012-08-29 | Spray nozzle capable of improving laser cladding effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202786434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862034A (en) * | 2016-06-14 | 2016-08-17 | 浙江工业大学 | Supersonic laser deposition coaxial powder feeding device |
-
2012
- 2012-08-29 CN CN 201220429501 patent/CN202786434U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862034A (en) * | 2016-06-14 | 2016-08-17 | 浙江工业大学 | Supersonic laser deposition coaxial powder feeding device |
| CN105862034B (en) * | 2016-06-14 | 2018-11-13 | 浙江工业大学 | A kind of supersonic speed laser deposition coaxial powder feeding apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202786434U (en) | Spray nozzle capable of improving laser cladding effect | |
| CN102828178B (en) | Coaxial nozzle for laser cladding | |
| CN202951880U (en) | High-efficient gas-liquid double layer running water atomization powder producing nozzle | |
| CN103046045A (en) | Double shielding gas premixing spray head with spiral gas and powder channels for laser cladding | |
| CN102864451B (en) | Method and sprayer for improving laser cladding effect | |
| CN107876786A (en) | A kind of method of oxidization of metal powder in reduction water atomization pulverization | |
| CN102828177A (en) | Integrated coaxial nozzle for laser cladding | |
| CN207043278U (en) | The casting system of wind power gear cover plate transparent cover casting | |
| CN202786433U (en) | Spray nozzle improving laser-cladding effect | |
| CN102899660B (en) | Method and nozzle improving laser cladding effect | |
| CN103334101B (en) | Coaxial nozzle for laser cladding | |
| CN102851665A (en) | Nozzle for laser cladding | |
| CN202786430U (en) | Coaxial nozzle for laser cladding | |
| CN203049038U (en) | Nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels | |
| CN100427459C (en) | Alkanolamine product distribution improvement method | |
| CN202786429U (en) | Integrated coaxial nozzle for laser cladding | |
| CN102864452B (en) | Method for preventing cracking during increase of height of laser cladding layer by utilizing combustion-supporting gas | |
| CN203049037U (en) | Premixing type nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels | |
| CN203235920U (en) | Bent sand core | |
| CN203625467U (en) | Hollow laser internal coaxial powder feeding device | |
| CN103046046A (en) | Double shielding gas spray head with spiral gas and powder channels for laser cladding | |
| CN202786432U (en) | Coaxial nozzle for laser cladding | |
| KR101507947B1 (en) | Water atomizing device for manufacturing metal powders | |
| CN206635417U (en) | A kind of laser melting coating shower nozzle | |
| CN101733232A (en) | Multi-sprayer glue injector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160602 Address after: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee after: Changzhou Tengen Industry Development Co.,Ltd. Address before: 215636, Jiangsu, Suzhou province Zhangjiagang Daxin Town sea dam road Patentee before: Zhangjiagang Hehao Laser Technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee after: CHANGZHOU TIANZHENG INDUSTRIAL DEVELOPMENT CO.,LTD. Address before: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee before: Changzhou Tengen Industry Development Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |