CN106346135A - Different material laser welding method - Google Patents
Different material laser welding method Download PDFInfo
- Publication number
- CN106346135A CN106346135A CN201610965887.7A CN201610965887A CN106346135A CN 106346135 A CN106346135 A CN 106346135A CN 201610965887 A CN201610965887 A CN 201610965887A CN 106346135 A CN106346135 A CN 106346135A
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- CN
- China
- Prior art keywords
- laser
- welding
- unlike
- materials
- laser welding
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- 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.)
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Classifications
-
- 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
- B23K26/32—Bonding taking account of the properties of the material involved
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a different material laser welding method, which is characterized in that a laser with the proper energy density, wavelength and pulse is selected to be used as a heat source for different material welding according to materials to be welded; during different material welding, laser is firstly emitted onto materials with the relatively high melting point and then penetrates onto a low-melting-pint material; metal burrs are formed on the two kinds of different materials through the laser effect; during the welding of two kinds of different materials by laser, the laser acting track is an arc-shaped track with a certain light spot overlapping rate. The different material laser welding method has the advantages that the operation is simple; the problems that during the welding between different metals, cracks easily occur, and the welding is not firm are solved; the performance is more excellent.
Description
Technical field
The present invention relates to technical field of laser processing, specifically relate to a kind of unlike material method for laser welding.
Background technology
Traditional laser welding technology cannot realize the unlike material welding of the big pulling force of high intensity, such as copper material and aluminum always
The laser welding of material, aluminium and rustless steel, rustless steel and copper, due to different materials between fusing point difference larger, lead to laser pair
Material is heated, and the mutually molten associativity of different materials is poor, leads to the weld of different materials can not form good metallographic,
Lead to the mechanical performance of bound fraction poor.Therefore, laser cannot replace some tradition to add in the welding of different materials always
Solder welds.
Content of the invention
The purpose of the present invention is exactly that the one kind providing to solve the deficiency of prior art is not only easy to operate, stability
Well, the big unlike material method for laser welding of the intensity of welded joint.
The present invention is to be attained in that a kind of unlike material method for laser welding using following technical solution,
It is characterized in that, it is that the material welding as needed selects appropriate energy density, wavelength, the laser instrument of pulse as different in nature material
The thermal source of material welding, when different materials welds, laser first incides on the of a relatively high material of fusing point, then is penetrated into eutectic
On point material, metallic bur power is formed on two kinds of unlike materials by laser action；During two kinds of unlike materials of laser welding, it swashs
Light action track is the arching trajectory having certain laser beam overlap ratio, after such laser welding track can be effectively increased welding
Metal barb density, thus increasing contact area, the bi-material required for providing combines required pulling force and thrust.
Further illustrating as such scheme, the laser of laser instrument is that requirement selects its energy density disclosure satisfy that to wear
Two-layer needs the material of welding thoroughly.
Further, optical maser wavelength is for needing the absworption peak of welding material to be selected, thus significantly optimizing material
Absorption to laser energy, thus improve weld strength.
Further, the selection of the pulse length of laser instrument determines action time to material for the laser from the time, by
There is certain reflectance in different materials to laser, the pulse laser using short or ultrashort peak value is made to material
With.
Preferably, need welding material be 304 rustless steels of 0.2mm and 0.5mm 3003 aluminum when；Laser instrument adopts
50w 3ns single mode pulse optical fiber, laser beam welding adopts circle to fill track, and the intensity of its binding site is more than two kinds
The intensity of mother metal itself.
The present invention using the beneficial effect that above-mentioned technical solution can reach is:
1st, using selecting appropriate energy density, the pulse laser of wavelength, laser instrument welds the present invention as unlike material
Thermal source, when different material welds, laser first incides on the of a relatively high material of fusing point, then is penetrated into low melting material
On, metallic bur power is formed on two kinds of unlike materials by laser action；During two kinds of unlike materials of laser welding, its laser action
Track is the arching trajectory having certain laser beam overlap ratio, and the metal that such laser welding track can be effectively increased after welding falls
Thorn density, thus increasing contact area, the bi-material required for providing combines required pulling force and thrust.
2nd, the present invention adopts appropriate energy density, the pulse laser of wavelength, and the selection of its energy density determines laser
Two-layer whether can be penetrated needs the material of welding, thus determining intensity；The selection of optical maser wavelength is primarily directed to different materials
Different to the absorption spectrum of laser, select optical maser wavelength for the absworption peak needing welding material, thus significantly optimizing material
Absorption to laser energy, thus improve weld strength；The selection of laser pulse length determines laser to material from the time
Action time, because different materials have certain reflectance to laser, using short or ultrashort peak value pulse laser pair
Material is acted on, and welds and crackle easily between effectively solving different metal, the problem of not prison welding.
Specific embodiment
Below in conjunction with specific embodiment, the technical program is explained in detail.
The present invention is a kind of unlike material method for laser welding, and it is that the material welding as needed selects appropriate energy close
The thermal source that degree, wavelength, the laser instrument of pulse weld as unlike material, when different materials welds, laser first incides molten
On the of a relatively high material of point, then it is penetrated on low melting material, metal is formed on two kinds of unlike materials by laser action
Burr；During two kinds of unlike materials of laser welding, its laser action track is the arching trajectory having certain laser beam overlap ratio, such
Laser welding track can be effectively increased the metal barb density after welding, thus increasing contact area, provides required two
Plant material and combine required pulling force and thrust.
In the present embodiment, the welding material of employing: 0.2mm 304 rustless steel and 0.5mm 3003 aluminum；Laser instrument adopts 50w
3ns single mode pulse optical fiber, laser beam welding fills track with circle；Test result indicate that, the intensity of binding site is big
In two kinds of mother metal intensity itself.
The present invention compared with prior art, when different material welds because materials with high melting point need to absorb more
Laser energy, the last weld strength of different materials therefore to be improved, it is necessary to provide energy first to dystectic material, then swashs
Light penetrates materials with high melting point and acts on energy to low melting material again.Laser action forms metallic bur power on two kinds of unlike materials,
This is also the key point of the pulse laser unlike material welding of the present invention, and all suitable laser of pulse width and energy is through the
Molten bath can be initially formed, then laser can allow down when acting on lower floor's low melting material through this layer material during one floor height melting material
Layer material moment seethes with excitement and gasifies and similar volcanic eruption is equally sprayed onto in the molten bath of the first layer material, then in laser action
In the complete short time, bi-material all solidifies, and the laser action point of last bi-material defines the size of substantial amounts of mixing
Little material burr and barb, thus another material is riveted together with the mother metal of oneself, provide bi-material here
Between adhesion be exactly burr between bi-material, rather than the machinery of the alloy being formed after the welding of conventional laser welding
Characteristic pulling force.Laser action track during laser unlike material be draw a circle, coiling etc. has the arching trajectory of certain laser beam overlap ratio,
Such laser welding track can be effectively increased the metal barb density after welding, thus increasing contact area, provides required
The bi-material wanted combines required pulling force and thrust, solves, in prior art, to weld and easily occur splitting between different metal
Stricture of vagina, the problem of not prison welding.
Above-described is only the preferred embodiment of the present invention it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, some deformation can also be made and improve, these broadly fall into the present invention
Protection domain.
Claims (5)
1. a kind of unlike material method for laser welding selects appropriate energy it is characterised in that it is the material welding as needed
The thermal source that density, wavelength, the laser instrument of pulse weld as unlike material, when different materials welds, laser first incides
On the of a relatively high material of fusing point, then it is penetrated on low melting material, gold is formed on two kinds of unlike materials by laser action
Belong to burr；During two kinds of unlike materials of laser welding, its laser action track is the arching trajectory having certain laser beam overlap ratio.
2. unlike material method for laser welding according to claim 1 is it is characterised in that the laser of laser instrument is requirement choosing
Select its energy density and disclosure satisfy that can penetrate two-layer needs the material of welding.
3. unlike material method for laser welding according to claim 1 is it is characterised in that optical maser wavelength is to be directed to need to weld
The absworption peak connecing material is selected.
4. unlike material method for laser welding according to claim 1 is it is characterised in that action time to material for the laser
Determined by the selection of the pulse length of laser instrument.
5. unlike material method for laser welding according to claim 1 is it is characterised in that the material of needs welding is
304 rustless steels of 0.2mm and 3003 aluminum of 0.5mm；Laser instrument adopts 50w3ns single mode pulse optical fiber, and Laser Welding is taken over
Cheng Caiyong circle fills track, and the intensity of its binding site is more than the intensity of two kinds of mother metals itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610965887.7A CN106346135A (en) | 2016-11-04 | 2016-11-04 | Different material laser welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610965887.7A CN106346135A (en) | 2016-11-04 | 2016-11-04 | Different material laser welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106346135A true CN106346135A (en) | 2017-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610965887.7A Pending CN106346135A (en) | 2016-11-04 | 2016-11-04 | Different material laser welding method |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253146A (en) * | 2019-07-03 | 2019-09-20 | 湖南科技大学 | A kind of high-strength copper Al dissimilar materials double helix welding procedure |
| CN111426639A (en) * | 2020-04-30 | 2020-07-17 | 华中科技大学 | Ultrafast laser dissimilar material welding quality judgment method and system |
| CN113953273A (en) * | 2021-10-29 | 2022-01-21 | 武汉锐科光纤激光技术股份有限公司 | Scanning method and device for object to be scanned, storage medium and electronic device |
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|---|---|---|---|---|
| DE19913436C1 (en) * | 1999-03-25 | 2000-12-14 | Erbsloeh Ag | Welded connection between components of different materials has additional material welded to one component and used to fill recesses in other component |
| CN101018641A (en) * | 2004-08-09 | 2007-08-15 | 日本电气株式会社 | Method for welding thin plates of different metal, joined body of double-metal thin plates, electric device, and electric device assembly |
| CN101378873A (en) * | 2006-02-17 | 2009-03-04 | 株式会社神户制钢所 | Flux-cored wire for different-material bonding and method of bonding different materials |
| CN102211253A (en) * | 2010-04-09 | 2011-10-12 | 深圳市大族激光科技股份有限公司 | Laser welding method for dissimilar metals |
| CN105855706A (en) * | 2015-02-09 | 2016-08-17 | 司浦爱激光技术英国有限公司 | A weld |
| WO2016128705A1 (en) * | 2015-02-09 | 2016-08-18 | Spi Lasers Uk Limited | Apparatus and method for overlap laser welding |
-
2016
- 2016-11-04 CN CN201610965887.7A patent/CN106346135A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19913436C1 (en) * | 1999-03-25 | 2000-12-14 | Erbsloeh Ag | Welded connection between components of different materials has additional material welded to one component and used to fill recesses in other component |
| CN101018641A (en) * | 2004-08-09 | 2007-08-15 | 日本电气株式会社 | Method for welding thin plates of different metal, joined body of double-metal thin plates, electric device, and electric device assembly |
| CN101378873A (en) * | 2006-02-17 | 2009-03-04 | 株式会社神户制钢所 | Flux-cored wire for different-material bonding and method of bonding different materials |
| CN102211253A (en) * | 2010-04-09 | 2011-10-12 | 深圳市大族激光科技股份有限公司 | Laser welding method for dissimilar metals |
| CN105855706A (en) * | 2015-02-09 | 2016-08-17 | 司浦爱激光技术英国有限公司 | A weld |
| WO2016128705A1 (en) * | 2015-02-09 | 2016-08-18 | Spi Lasers Uk Limited | Apparatus and method for overlap laser welding |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253146A (en) * | 2019-07-03 | 2019-09-20 | 湖南科技大学 | A kind of high-strength copper Al dissimilar materials double helix welding procedure |
| CN111426639A (en) * | 2020-04-30 | 2020-07-17 | 华中科技大学 | Ultrafast laser dissimilar material welding quality judgment method and system |
| CN111426639B (en) * | 2020-04-30 | 2021-02-09 | 华中科技大学 | Ultrafast laser dissimilar material welding quality judgment method and system |
| CN113953273A (en) * | 2021-10-29 | 2022-01-21 | 武汉锐科光纤激光技术股份有限公司 | Scanning method and device for object to be scanned, storage medium and electronic device |
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Application publication date: 20170125 |