CN108406111A - A kind of optical-fiber laser double-layer coaxial protection welding tip - Google Patents
A kind of optical-fiber laser double-layer coaxial protection welding tip Download PDFInfo
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- CN108406111A CN108406111A CN201810188935.5A CN201810188935A CN108406111A CN 108406111 A CN108406111 A CN 108406111A CN 201810188935 A CN201810188935 A CN 201810188935A CN 108406111 A CN108406111 A CN 108406111A
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- nozzle
- internal layer
- layer
- nozzle outer
- coaxial
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/1462—Nozzles; Features related to nozzles
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
A kind of optical-fiber laser double-layer coaxial protection welding tip, belongs to materials processing technology field.The double-deck nozzle is distributed with laser beam axle center for coaxial-symmetrical, and coaxial shielding gas body is exported by inside/outside nozzle respectively；The outer stratotype face normal of internal layer nozzle is less than 5 ° with laser beam axis angle, and the interior stratotype face normal of nozzle outer is parallel with laser beam axis；Internal layer nozzle inside diameter (plumage brightness channel) be 6~10mm, nozzle outer internal diameter (protective gas output channel) be 15~25mm, and internal layer nozzle end with nozzle outer end in the same plane；Interior nozzle end in the same plane, and 3~8mm of internal layer nozzle distance workpiece surface.Compared with traditional fiber laser coaxial weld seam nozzle, for this double-layer coaxial nozzle during penetration fustion welding, appearance of weld and face of weld protection are good, and O/N contents are effectively controlled in weld seam, and the weld defects such as hump and splashing are effectively suppressed.
Description
Technical field
It is to be protected using coaxial double-layer to protect welding tip, concrete structure the present invention relates to a kind of optical-fiber laser double-layer coaxial
The welding gas way of output, be suitable for optical-fiber laser two-dimensional/three-dimensional penetration fustion welding, belong to materials processing technology field.
Background technology
Industrial solid state laser of the optical fiber laser as a new generation, has obtained widely answering in laser welding field
With.Its application prospect in the welding manufacture of three-dimensional structure is increasingly bright and clear in recent years, so coaxial protection technique swashs as optical fiber
Light device three-dimensional welding manufactures the technical bottleneck that must be solved.It is well known that optical-fiber laser is since its wavelength is short, material inhales it
High income, plumage brightness eruption strength is big in penetration fustion welding process mesoporous, and speed is fast.The behavioural characteristic of plumage brightness leads to coaxial shielding gas body
Output fluidised form under extremely difficult holding static conditions, poor so as to cause face of weld protecting effect, weld seam hump is serious, spatter
It is big to wait weld defects.By the study found that protecting welding tip, the eruption that internal layer nozzle provides plumage brightness logical using double-layer coaxial
Road, nozzle outer provide protective gas output channel, and effective multiple structural features of internal layer/nozzle outer ensure that protective gas
Output fluidised form is not influenced by plumage brightness behavior；Shown by the welding realization under different welding conditions：The nozzle can have
The realization weld seam protection of effect is good, and the welding effect for inhibiting hump and weld seam to splash provides for optical-fiber laser three-dimensional welding technique
Effective welding quality control means.
Invention content
The present invention provides a kind of optical-fiber laser double-layer coaxial protection welding tip, can effectively inhibit hump and spatter,
Appearance of weld is stablized, and protecting effect is good.
The optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：It is defeated using double-layer coaxial protective gas
Go out mode, protective gas is exported from internal layer nozzle and nozzle outer respectively, and flow is individually adjusted, and same laser beam
For coaxial state.
The optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：It is same using internal layer nozzle/nozzle outer
Axis is compound, and for internal layer nozzle cage within nozzle outer, the outer stratotype face of internal layer nozzle is the conical surface, the same laser beam axis of conical surface normal
Angle is less than 5 °, and the interior stratotype face normal of nozzle outer is parallel with laser beam axis.
The optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：Internal layer nozzle end internal diameter, that is, internal layer
Nozzle plumage brightness channel is 6~10mm, and nozzle outer end internal diameter is 15~25mm；
The optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：Nozzle outer end is the same as internal layer nozzle
End is in the same plane.
The optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：Internal layer nozzle axial length is more than outer
Layer nozzle axial length, protrudes and is equipped with internal layer nozzle air inlet at the internal layer nozzle lateral surface of nozzle outer；In an axial direction in outer layer
The upper surface of nozzle is equipped with nozzle outer homogenizing output annular chamber, nozzle outer air inlet annular chamber and connects, outer layer spray successively
Mouth, nozzle outer homogenizing output annular chamber, nozzle outer air inlet annular cavity axis are point-blank；And nozzle outer homogenizing is defeated
The radial width for going out annular chamber is respectively less than the radial width of nozzle outer, nozzle outer air inlet annular chamber radial width；Outer layer sprays
The lateral wall of mouth air inlet annular chamber is equipped with nozzle outer air inlet.
The optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：Internal layer nozzle end is apart from workpiece table
3~8mm of face.
The optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：Protective gas output parameter condition：It is interior
Layer orifice gas argon flow amount 0-20L/min, nozzle outer gases argon flow 10-20L/min；It is different that optical-fiber laser can be achieved
Penetration fustion welding under the welding parameter of power 1000-4000W and different speed of welding 1000-3000mm/min, appearance of weld are steady
Fixed, weld seam protection is good.
The present invention includes following advantageous effect：Using above-mentioned gas flow parameter, in said nozzle structure and welding procedure
Under parameter, hump is can inhibit, substantially reduces the appearances of weld defects such as spatter；O/N contents are effectively controlled in weld seam simultaneously
System can further improve the Weld Performance of the high temperature alloys such as GH3128, reduce weld seam hot cracking tendency.The nozzle can be answered effectively
For in optical-fiber laser two-dimensional/three-dimensional penetration fustion welding technique, realizing that appearance of weld is good, the complex three-dimensional component of dependable performance
Laser welding manufactures.
Description of the drawings
Fig. 1 is that optical-fiber laser double-layer coaxial protects welding tip schematic diagram；
In figure：1. internal layer nozzle, 2. nozzle outers, the outer stratotype face normal of 3. internal layer nozzles, stratotype face in 4. nozzle outers
Normal, 5. laser beam axis, 6. laser beams, 7. workpiece, 8. internal layer nozzle air inlets, 9. nozzle outer air inlets, the spray of 10. outer layers
Mouth air inlet annular chamber, 11. nozzle outers homogenizing output annular chamber.
1 various sample of Fig. 2 embodiment of the present invention numbers corresponding different surface morphology figure；
A corresponds to specimen coding 1, and b corresponds to specimen coding 2, and c corresponds to specimen coding 3, and d corresponds to specimen coding 4.
Specific implementation mode
With reference to embodiment, the invention will be further described, but the present invention is not limited to following embodiments.
Embodiment 1
Illustrate that present embodiment, present embodiment are larger for this welding hot crack tendencies of GH3128 in conjunction with Fig. 1 and Fig. 2
High temperature alloy, using scanning welding manner, using double-layer coaxial protection welding tip welded.Wherein：Nozzle outer is logical
It crosses welding manner (soldering/laser welding) to connect with internal layer nozzle, is machined with internal layer nozzle air inlet 8 above internal layer nozzle, outside
Layer nozzle is machined with nozzle outer air inlet 9；Laser beam 6 is that coaxial state vertical incidence exists with internal layer nozzle 1 and nozzle outer 2
7 surface of workpiece.Internal layer protects gas (argon gas) to enter in internal layer nozzle 1 through internal layer nozzle air inlet 8, and exports to 7 surface of workpiece；
Outer protective gas enters nozzle outer air inlet annular chamber 10 by nozzle outer air inlet 9, is then homogenized by nozzle outer
It is exported to 7 surface of workpiece in nozzle outer 2 after 11 homogenization of delivery outlet (uniformly distributed in a ring).
1 welding condition of embodiment is as shown in the table：
Seam center of the double-layer coaxial protection welding method under gas with various output parameter in 2 embodiment 1 of table, in weld seam
Measure O/N contents and the difference in height of face of weld reinforcement.
Wherein, P is laser power, and V is speed of welding, and L1 is internal layer orifice gas flow, and L2 is outer layer gas flow, CO
For O content in button, CNFor N content in button；1 lower surface of internal layer nozzle is apart from 7 upper surface distance of workpiece
5mm.Internal layer nozzle inside diameter is 8mm, outer diameter 10mm；Nozzle outer internal diameter is 25mm, outer diameter 30mm.Material used in the present embodiment
Material is GH3128, plate thickness 6mm, and workpiece surface greasy dirt to be welded is removed with acetone before weldering.
From face of weld (as shown in Fig. 2 and table 2) as can be seen that for embodiment 1, in no outer layer protection gas bar part
Under, no matter internal layer nozzle have unprotect gas in the case of (specimen coding 1 and 2), appearance of weld is poor, there is apparent hump, welding
It splashes big, face of weld is dark brown, and protection is bad.And in the case of having outer layer protection gas (specimen coding 3 and 4), weld seam
Surface is apparent metallic luster, is in brilliant white；Weld seam significantly reduces without hump, spatter.In addition, can be with from Fig. 2
Find out, under the conditions of applying outer layer protection gas, weld reinforcement fluctuation is smaller, illustrates that appearance of weld process is more stablized.Button
Middle O/N content measurings the result shows that, under double-layer coaxial protective condition, O/N is lower in button under the conditions of outer layer protection gas.On
State result explanation：Under the conditions of this embodiment, double-layer coaxial protection nozzle can effectively improve appearance of weld and protecting effect,
And inhibit the weld defects such as hump and splashing, while O/N is lower in weld seam, further improves weldquality.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art is in the technical scope that the present invention discloses, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (7)
1. optical-fiber laser double-layer coaxial protects welding tip, it is characterised in that：Using the double-layer coaxial protective gas way of output, protect
It protects gas to export from internal layer nozzle and nozzle outer respectively, flow is individually adjusted, and is coaxial with laser beam
State.
2. optical-fiber laser double-layer coaxial described in accordance with the claim 1 protects welding tip, it is characterised in that：It is sprayed using internal layer
Mouth/nozzle outer is coaxially compound, and for internal layer nozzle cage within nozzle outer, the outer stratotype face of internal layer nozzle is the conical surface, conical surface method
Line is less than 5 ° with laser beam axis angle, and the interior stratotype face normal of nozzle outer is parallel with laser beam axis.
3. optical-fiber laser double-layer coaxial described in accordance with the claim 1 protects welding tip, it is characterised in that：Internal layer nozzle end
Internal diameter, that is, internal layer nozzle plumage brightness channel is 6~10mm, and nozzle outer end internal diameter is 15~25mm.
4. optical-fiber laser double-layer coaxial described in accordance with the claim 1 protects welding tip, it is characterised in that：Nozzle outer end
In the same plane with internal layer nozzle end.
5. optical-fiber laser double-layer coaxial described in accordance with the claim 1 protects welding tip, it is characterised in that：Internal layer nozzle is axial
Length is more than nozzle outer axial length, and internal layer nozzle air inlet is equipped at the internal layer nozzle lateral surface of prominent nozzle outer；Edge
It is axial to be equipped with nozzle outer homogenizing output annular chamber, nozzle outer air inlet annular chamber successively in the upper surface of nozzle outer and connect
Logical, nozzle outer, nozzle outer homogenizing output annular chamber, nozzle outer air inlet annular cavity axis are point-blank；And outer layer
It is radially-wide that the radial width of nozzle homogenizing output annular chamber is respectively less than the radial width of nozzle outer, nozzle outer air inlet annular chamber
Degree；The lateral wall of nozzle outer air inlet annular chamber is equipped with nozzle outer air inlet.
6. special according to the method for claim 1-5 any one of them optical-fiber laser double-layer coaxials protection welding tip work
Sign is：Internal layer nozzle end is apart from 3~8mm of workpiece surface.
7. according to the method for claim 6, which is characterized in that protective gas output parameter condition：Internal layer orifice gas argon gas stream
Measure 0-20L/min, nozzle outer gases argon flow 10-20L/min；Realize optical-fiber laser different capacity 1000-4000W and not
With the penetration fustion welding under the welding parameter of speed of welding 1000-3000mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188935.5A CN108406111B (en) | 2018-03-08 | 2018-03-08 | Optical fiber laser double-layer coaxial protection welding nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188935.5A CN108406111B (en) | 2018-03-08 | 2018-03-08 | Optical fiber laser double-layer coaxial protection welding nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108406111A true CN108406111A (en) | 2018-08-17 |
| CN108406111B CN108406111B (en) | 2020-05-08 |
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ID=63130327
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810188935.5A Active CN108406111B (en) | 2018-03-08 | 2018-03-08 | Optical fiber laser double-layer coaxial protection welding nozzle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434459A (en) * | 2019-07-20 | 2019-11-12 | 北京工业大学 | A kind of double-layer coaxial laser welding head for controlling plumage brightness and protecting molten bath |
| WO2021123124A1 (en) * | 2019-12-20 | 2021-06-24 | Precitec Gmbh & Co. Kg | Nozzle for a laser machining device, and laser machining device comprising same |
| CN116275473A (en) * | 2023-05-17 | 2023-06-23 | 常州特尔玛科技股份有限公司 | Handheld laser welding machine capable of preventing metal from splashing and use method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434459A (en) * | 2019-07-20 | 2019-11-12 | 北京工业大学 | A kind of double-layer coaxial laser welding head for controlling plumage brightness and protecting molten bath |
| WO2021123124A1 (en) * | 2019-12-20 | 2021-06-24 | Precitec Gmbh & Co. Kg | Nozzle for a laser machining device, and laser machining device comprising same |
| CN114929425A (en) * | 2019-12-20 | 2022-08-19 | 普雷茨特两合公司 | Nozzle for laser processing equipment and laser processing equipment with same |
| CN116275473A (en) * | 2023-05-17 | 2023-06-23 | 常州特尔玛科技股份有限公司 | Handheld laser welding machine capable of preventing metal from splashing and use method |
| CN116275473B (en) * | 2023-05-17 | 2023-08-01 | 常州特尔玛科技股份有限公司 | Handheld laser welding machine capable of preventing metal from splashing and use method |
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| Publication number | Publication date |
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| CN108406111B (en) | 2020-05-08 |
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