CN109014575A - A kind of double heated filament laser soldering devices of narrow gap, methods and applications - Google Patents
A kind of double heated filament laser soldering devices of narrow gap, methods and applications Download PDFInfo
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- CN109014575A CN109014575A CN201811000369.7A CN201811000369A CN109014575A CN 109014575 A CN109014575 A CN 109014575A CN 201811000369 A CN201811000369 A CN 201811000369A CN 109014575 A CN109014575 A CN 109014575A
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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
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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
- B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
-
- 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
- B23K26/70—Auxiliary operations or equipment
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The invention discloses a kind of double heated filament laser soldering devices of narrow gap, method and applications, the double heated filament laser soldering devices of narrow gap include the radiating laser beams device for emitting laser beam, the two sides of laser beam are respectively arranged with filler wire, carry out laser welding after filler wire heating.The double heated filament laser soldering device of narrow gap of the present invention or method make it have stronger weld seam filling capacity by introducing pair heated filaments, avoid interactively complicated between laser and electric arc, avoid the generation of spatter etc..In addition, heated filament can make laser power obtain a degree of reduction, so that thermal weld stress maintains lower level, and then the generation of big welding heat affected zone and welding deformation is avoided.In addition in welding method, part of laser beam is acted on into side wall, is conducive to the defects of avoiding side wall incomplete fusion, while forming welding pool in the form of thermal conductivity weldering, avoids the generation of weld keyhole, welding process is stablized.
Description
Technical field
The present invention relates to laser welding fields, more particularly to the double heated filament laser soldering devices of narrow gap, methods and applications.
Background technique
Thick plates structure has in nuclear power generating equipment, shipbuilding, aerospace and pressure vessel field widely answers
With.Especially in nuclear power generating equipment manufacturing field, there are a large amount of thick plate structures, and application conditions require harshness, such as nuclear power supervisor
Road.Currently, the welding method of thick plate structure mainly has submerged-arc welding, gas metal-arc welding, these methods usually require workpiece
Biggish groove is opened, welding road number is more, and heat input is larger, it is therefore desirable to more packing material, and biggish weldering can be generated
Connect deformation and residual stress.
With the continuous development of laser technology, laser application has penetrated into the various aspects of scientific research, industry, in automobile system
It makes, the fields such as aerospace, steel, intermetallic composite coating, metallurgy, solar energy and Medical Devices all play an important role.Currently, swashing
Photocoagulation method also gradually develops to field of machining, and laser narrow gap welding method is by the advantage of laser technology and narrow gap
In conjunction with there is lesser thermal weld stress, relatively narrow welding heat affected zone and post welding distortion, while needing less filling metal
Material has good development prospect.Currently, laser fills silk, laser facula is mainly focused on welding wire end by narrow gap method
End, laser facula are less than groove gap, wire melting are filled gap, but when groove size is larger, due to laser beam spot
It is smaller, groove two sides can not effectively be melted, inevitably will lead to and the defects of side wall incomplete fusion occur, and usually
Biggish laser power is needed, the requirement to equipment is also higher.Therefore in slab narrow gap welding, sidewall fusion is still anxious
Critical issue to be solved, while lesser thermal weld stress is needed again, reduce the influence to base material performance.
Publication CN102225494A in 2011 describes a kind of compound narrow groove welding method of laser-arc, will melt
Pole welding wire for gas shielded welding and filler wire are respectively placed in laser beam two sides, and although this method can be enhanced fills out weld seam
Fill ability, but laser and electric arc interaction are complex, Process Exploration is relatively difficult, the defects of will lead to spatter
It generates.Publication CN104384717A in 2014 describes a kind of swing laser-heated filament slab narrow gap interconnection method, still
Specific surface sweeping galvanometer is needed to control laser beam, welding stability is more difficult to control.
Summary of the invention
In view of this, an object of the present invention is to provide a kind of double heated filament laser soldering devices of narrow gap and method, it should
Device or method can reduce the heat input in welding process and improve welding efficiency, and incomplete fusion etc. is avoided to weld
Defect.The second object of the present invention is to provide a kind of application method of above-mentioned welding method in slab narrow gap.
In order to achieve the above objectives, on the one hand, the present invention adopts the following technical scheme:
A kind of double heated filament laser soldering devices of narrow gap, the laser beam emitter including emitting laser beam, laser beam
Two sides be respectively arranged with filler wire, carry out laser welding after filler wire heating.
It is preferable that the filler wire is sent by the ignition tip that laser beam two sides are arranged in, is adjusted and filled by ignition tip
The feed rate and feeding direction of welding wire.
It is preferable that being heated using heater supply to filler wire.
Along bead direction longitudinal arrangement, two beam filler wires are located at the front and back of laser beam for filler wire and laser beam
Two sides.
The material of two beam filler wires is identical component or heterogeneity.
It is preferable that the filler wire diameter is 0.8~1.6mm；And/or
Laser beam incident angle is 5~30 °；And/or
Welding wire incident angle is 30~75 °；And/or
Narrow sloping-glot width be 3~8mm, root face height be 2~8mm, 2~4 ° of bevel angle；And/or laser beam is
Gas laser or Solid State Laser or semiconductor laser.
A kind of double heated filament method for laser welding of narrow gap, are arranged two beam filler wires, filling weldering around laser beam spot
Silk is in contact with laser beam spot, and laser welding is carried out in Narrow sloping-glot after filler wire heating.
Laser beam spot diameter is greater than the gap of narrow gap.
It is preferable that laser welding is welded using thermal conductivity.
On the other hand, the present invention adopts the following technical scheme:
A kind of double heated filament method for laser welding of slab narrow gap, include the following steps:
1) type I groove or the U-shaped or double V-groove with root face are set between two thick plate to be welded；And joint face to be welded is carried out
Surface treatment；
2) transmit the laser beam to groove bottom, using laser self-welding connect method to the U-shaped or double V-groove with root face into
Row bottoming；
3) laser is focused again, carries out multilayer using the double heated filament method for laser welding of narrow gap according to any one of claims 8
Welding, and grinding process is carried out to every layer of face of weld.
The double heated filament laser soldering devices of narrow gap of the present invention or method are made it have stronger by the double heated filaments of introducing
Weld seam filling capacity, avoid interactively complicated between laser and electric arc, avoid the generation of spatter etc..In addition,
Heated filament can make laser power obtain a degree of reduction, so that thermal weld stress maintains lower level, and then keep away
The generation of big welding heat affected zone and welding deformation is exempted from.In addition in welding method, part of laser beam is acted on into side wall,
Be conducive to the defects of avoiding side wall incomplete fusion, while forming welding pool in the form of thermal conductivity weldering, avoids the production of weld keyhole
Raw, welding process is stablized.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the double heated filament laser soldering devices of narrow gap of the present invention；
Fig. 2 is that laser beam spot and gap width are shown during welder of the present invention is in narrow gap welding
It is intended to.
In figure, 1, laser beam；2, groove gap；3, postposition ignition tip；4, preposition ignition tip；5, postposition filler wire；6,
Preposition filler wire；7, filler pass；8, welding pool；9, base metals；α, postposition wire feed incidence angle；β, preposition wire feed are incident
Angle.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
Text is detailed to describe some specific detail sections in datail description of the invention, in order to avoid obscuring essence of the invention,
There is no narrations in detail for well known method, process, process, element.
In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and
What attached drawing was not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, be " including but not limited to " contains
Justice.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
As shown in Figure 1, a kind of double heated filament laser soldering devices of narrow gap, including radiating laser beams device, it is sharp for emitting
Light beam 1, further includes the filler wire that 1 two sides of laser beam are arranged in, and base metals 9 to be connected are arranged in entire welder
In groove gap 2.
Filler wire and laser beam 1 are along bead direction longitudinal arrangement, and along welding direction, two beam filler wires distinguish position
In the front and rear sides of laser beam 1, the filler wire positioned at 1 front side of laser beam is preposition filler wire 6, is located at 1 rear side of laser beam
Filler wire be postposition filler wire 5, preposition filler wire 6 is arranged in preposition ignition tip 4, and postposition filler wire 5 is arranged
In postposition ignition tip 3, ignition tip is sent the filler wire being disposed therein.
The position of adjustment ignition tip can control the feeding angle and direction of filler wire, so that preposition filler wire
6 and postposition filler wire 5 intersect with the hot spot of laser beam 1, it is ensured that welding wire sufficiently melts and forms the stable droplet transfer.
When being welded, forward and backward filler wire of setting is sent by forward and backward ignition tip of setting, and is acted in the heat of laser beam 1
Under, the side wall of filler wire and base metals 9 forms welding pool 8, to be formed in the narrow gap bottom that base metals are formed
Filler pass 7.
Filler wire is heated by heater supply, forms heated filament after filler wire heating, double heated filaments make required for welding
Laser power reduces, to have lower heat input in welding process, and then avoids big welding heat affected zone and weldering
Connect the generation of deformation.
The present invention also provides a kind of double heated filament method for laser welding of narrow gap, are included in around laser beam spot and are arranged two
Beam filler wire, filler wire are in contact with laser beam spot, and Laser Welding is carried out in Narrow sloping-glot after filler wire heating
It connects, laser beam spot diameter is greater than the gap of narrow gap.
As shown in Fig. 2, the spot diameter of laser beam 1 is greater than the spacing of groove gap 2, laser beam 1 a part of in this way can be with
9 side wall of base metals is acted on, melted side wall metal avoids the unfused defect of side wall；Another part acts on 2 bottom of groove gap
Portion and heated filament interact, and fusing welding wire metal forms welding pool 8 and then forms filler pass 7.
In above-mentioned apparatus or method, the material of two beam filler wires is identical component or heterogeneity.Filler wire is straight
Diameter is 0.8~1.6mm；Laser beam incident angle is 5~30 °；Welding wire incident angle is 30~75 °；Narrow sloping-glot width 3~
8mm, root face height be 2~8mm, 2~4 ° of bevel angle.Laser beam is gas laser or Solid State Laser or semiconductor laser.
The present invention also provides the application of above-mentioned apparatus or method, i.e., the double heated filament laser welding sides of a kind of slab narrow gap
Method includes the following steps:
1) type I groove or the U-shaped or double V-groove with root face are set between the two thick plates to be welded；And joint face to be welded is adopted
It is polished, is polished with sand paper, then remove surface and oil contaminant and dust etc. with acetone soln；
2) groove bottom is transmitted the laser beam generated by the laser to, method is connect to the U with root face using laser self-welding
Type or double V-groove carry out bottoming；
3) it after completing bottom welding, needs to focus laser again, carries out the double heated filament Laser Weldings of above-mentioned narrow gap
It connects method and carries out multi-layer welding, and grinding process is carried out to every layer of face of weld.
In order to verify the effect of the double heated filament laser soldering devices of narrow gap of the present invention and method, spy is implemented as follows
Example:
Embodiment 1:
Butt welding is carried out to a thickness of the 316L stainless steel of 30mm, using rectangular seamless Narrow sloping-glot, groove width
For 4mm, root face 3mm.Welding wire uses diameter for the Y308L stainless steel welding stick of 1.2mm, is respectively arranged at along bead direction sharp
Before and after light hot spot.The Yb optical fiber laser produced using IPG company, laser peak power output 6kW, focal position is in workpiece
Top, groove bottom spot diameter are 3.0mm, it is ensured that laser can heat entire groove bottom, and laser incident angle is 10 °.
Welding wire is heated using the heater supply that Fronius company produces, the wire feed angle [alpha] of preposition filler wire is 45 °, wire feed
Speed is 6m/min；The wire feed angle beta of postposition filler wire is 60 °, wire feed rate 5m/min, and average heater current is 85A,
Heater voltage is 5.0V.Speed of welding is 0.4m/min, and entire welding process is protected using pure argon, and argon flow is
15L/min。
Welding plate material is treated before weldering to be rigidly fixed, and is polished using sand paper joint face to be welded, polishing, then it is molten with acetone
Liquid removes surface and oil contaminant and dust etc.；Groove bottom is transmitted the laser beam generated by the laser to, using the laser self-welding side of connecing
Method carries out bottom welding, guarantees complete penetration signal；After completing bottom welding, welding bead is cleared up；With the increase of welding bead,
Appropriate adjustment focal position of laser is needed, then welding wire is sent into, and double heated filament laser narrow gap weldings is carried out, until weld seam fills up.
Mode is welded using laser thermal conductivity in the present embodiment, can be to avoid the generation of laser keyhole, while can use lower
Thermal weld stress, therefore welding deformation and residual stress are smaller, while weld metal can be greatly improved in the introducing of double heated filaments
Filling capacity.Resulting welding joint shaping is good, carries out weld seam bottom through welding and two sides penetration to test specimen after the completion of welding.
Embodiment 2:
Butt welding is carried out to the 304L stainless-steel sheet with a thickness of 60mm, groove unilateral side root face width is 3mm, and groove is deep
Degree is 55mm, and unilateral bevel angle is 2 °, is placed below in docking plate with a thickness of the stainless billet of 20mm thickness, and to be welded
Plate is rigidly fixed.It uses diameter for the ER347 stainless steel welding stick of 1.0mm, is respectively arranged at hot spot along bead direction
Front and back.Using IPG company produce Yb optical fiber laser, laser peak power output 6kW, focal position above workpiece,
Groove bottom spot diameter is 4mm, it is ensured that laser can heat entire groove bottom, and laser incident angle is 10 °.Using
The heater supply of Fronius company production heats welding wire, and the wire feed angle [alpha] of preposition filler wire is 45 °, wire feed rate
For 6m/min；The wire feed angle beta of postposition filler wire is 60 °, wire feed rate 6m/min, and average heater current is 85A, heated filament
Voltage is 5.0V.Speed of welding is 0.4m/min, and entire welding process is protected using pure argon, argon flow 15L/
min。
Welding plate material is treated before weldering to be rigidly fixed, and is polished using sand paper joint face to be welded, polishing, then it is molten with acetone
Liquid removes surface and oil contaminant and dust etc.；Groove bottom is transmitted the laser beam generated by the laser to, welding wire metal is fed separately to, into
The double heated filament laser narrow gap weldings of row need appropriate adjustment focal position of laser with the increase of welding bead, until weld seam fills up.
Postwelding carries out detection and two sides penetration to test specimen.
Those skilled in the art will readily recognize that above-mentioned each preferred embodiment can be free under the premise of not conflicting
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is merely exemplary, and not restrictive, without departing from of the invention basic
In the case where principle, those skilled in the art can be directed to the various apparent or equivalent modification or replace that above-mentioned details is made
It changes, is all included in scope of the presently claimed invention.
Claims (10)
1. a kind of double heated filament laser soldering devices of narrow gap, the radiating laser beams device including emitting laser beam, which is characterized in that
The two sides of laser beam are respectively arranged with filler wire, carry out laser welding after filler wire heating.
2. a kind of double heated filament laser soldering devices of narrow gap according to claim 1, which is characterized in that the filler wire
Ignition tip by laser beam two sides are arranged in is sent, and the feed rate and/or feeding direction of filler wire are adjusted by ignition tip.
3. a kind of double heated filament laser soldering devices of narrow gap according to claim 1, which is characterized in that further include heated filament electricity
Source, for being heated to filler wire.
4. a kind of double heated filament laser soldering devices of narrow gap according to claim 1, which is characterized in that filler wire and swash
Light beam is located at the front and rear sides of laser beam along bead direction longitudinal arrangement, two beam filler wires.
5. a kind of double heated filament laser soldering devices of narrow gap according to claim 1, which is characterized in that two beam filler wires
Material be identical component or heterogeneity.
6. a kind of double heated filament laser soldering devices of narrow gap according to claim 1, which is characterized in that the filler wire
Diameter is 0.8~1.6mm；And/or
Laser beam incident angle is 5~30 °；And/or
Welding wire incident angle is 30~75 °；And/or
Narrow sloping-glot width be 3~8mm, root face height be 2~8mm, 2~4 ° of bevel angle；And/or
Laser beam is gas laser or Solid State Laser or semiconductor laser.
7. a kind of double heated filament method for laser welding of narrow gap, which is characterized in that the filling weldering of two beams is arranged around laser beam spot
Silk, filler wire are in contact with laser beam spot, and laser welding is carried out in Narrow sloping-glot after filler wire heating.
8. a kind of double heated filament method for laser welding of narrow gap according to claim 7, which is characterized in that laser beam spot is straight
Diameter is greater than the gap of narrow gap.
9. a kind of double heated filament method for laser welding of narrow gap according to claim 8, which is characterized in that laser welding uses
Thermal conductivity weldering.
10. a kind of double heated filament method for laser welding of slab narrow gap, which comprises the steps of:
1) type I groove or the U-shaped or double V-groove with root face are set between the two thick plates to be welded, and table is carried out to joint face to be welded
Surface treatment；
2) groove bottom is transmitted the laser beam to, method is connect using laser self-welding, the U-shaped or double V-groove with root face is beaten
Bottom；
3) laser is focused again, carries out multi-layer welding using the double heated filament method for laser welding of narrow gap according to any one of claims 8,
And grinding process is carried out to every layer of face of weld.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453215A (en) * | 2019-09-01 | 2019-11-15 | 陕西天元智能再制造股份有限公司 | A kind of bimetallic silk material laser melting coating system and method |
| CN111299828A (en) * | 2019-11-27 | 2020-06-19 | 北京工业大学 | Thick plate ultra-narrow gap laser wire-filling thermal conduction welding method |
| CN112975122A (en) * | 2021-03-04 | 2021-06-18 | 南昌航空大学 | Welding gas protection device, laser wire filling welding system and welding method |
| CN113458601A (en) * | 2021-07-02 | 2021-10-01 | 广东普电自动化科技股份有限公司 | Double wire feeding laser welding gun and welding method |
| CN114178698A (en) * | 2021-12-13 | 2022-03-15 | 湖南华菱涟源钢铁有限公司 | 9Ni steel narrow-gap laser filler wire welding method |
| CN115178868A (en) * | 2022-07-26 | 2022-10-14 | 中国科学院上海光学精密机械研究所 | Laser wire filling welding method for thick plate |
| CN116372374A (en) * | 2023-05-24 | 2023-07-04 | 中国科学院力学研究所 | Double-station laser welding machine and laser welding method for coated sheet |
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| CN112975122B (en) * | 2021-03-04 | 2023-03-24 | 南昌航空大学 | Welding gas protection device, laser wire filling welding system and welding method |
| CN113458601A (en) * | 2021-07-02 | 2021-10-01 | 广东普电自动化科技股份有限公司 | Double wire feeding laser welding gun and welding method |
| CN114178698A (en) * | 2021-12-13 | 2022-03-15 | 湖南华菱涟源钢铁有限公司 | 9Ni steel narrow-gap laser filler wire welding method |
| CN114178698B (en) * | 2021-12-13 | 2024-04-09 | 湖南华菱涟源钢铁有限公司 | 9Ni steel narrow-gap laser filler wire welding method |
| CN115178868A (en) * | 2022-07-26 | 2022-10-14 | 中国科学院上海光学精密机械研究所 | Laser wire filling welding method for thick plate |
| CN115178868B (en) * | 2022-07-26 | 2024-04-12 | 中国科学院上海光学精密机械研究所 | Laser filler wire welding method for medium plate |
| CN116372374A (en) * | 2023-05-24 | 2023-07-04 | 中国科学院力学研究所 | Double-station laser welding machine and laser welding method for coated sheet |
| CN116372374B (en) * | 2023-05-24 | 2023-09-15 | 中国科学院力学研究所 | Double-station laser welding machine and laser welding method for coated sheet |
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Application publication date: 20181218 |
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