CN110102898A - A kind of compound molten welding method of laser scanning-TIG - Google Patents
A kind of compound molten welding method of laser scanning-TIG Download PDFInfo
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- CN110102898A CN110102898A CN201910224791.9A CN201910224791A CN110102898A CN 110102898 A CN110102898 A CN 110102898A CN 201910224791 A CN201910224791 A CN 201910224791A CN 110102898 A CN110102898 A CN 110102898A
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- tig
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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
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention discloses a kind of compound molten welding method of laser scanning-TIG, when including: welding, use the band-like welding wire with rectangular section, band-like welding wire is sent into the top of workpiece gap to be welded by tape-feed, the width direction of band-like welding wire and welding direction are angled, the anode of the termination power output end of TIG welding gun one, band-like welding wire connects the cathode of power output end, laser beam is scanned along welding direction, scanning area half is located at band-like welding wire, half is located on molten bath, and the path of laser scanning has different modes according to different materials and welding requirements.The effect of intercoupling of the present invention enhancing laser and electric arc, laser is enhanced to the stirring action in molten bath, make up the deficiency that molten bath relies on merely surface tension driving to flow, extend molten bath setting time, reduce the impact of the temperature gradient and molten drop of molten drop and molten bath to molten bath, be conducive to the evolution of bubble, and inhibit the formation of solidification cracking.
Description
Technical field
The invention belongs to welding technology field more particularly to a kind of compound molten welding methods of laser scanning-TIG.
Background technique
Laser welding is the process that metalwork is added as moving heat sources for a laser beam using focusing.The laser beam of focusing
With very high power density, have that welding is fast, the features such as fusion penetration big and narrow heat affected area.Laser welding is more and more extensive
It applies in fields such as automobile, aerospace, national defense industry, shipbuilding, ocean engineerings on ground.
The electric arc combined welding of laser-TIG, by the outer plus electric arc near laser beam, so that electron density is reduced, dilution etc.
Gas ions cloud reduces the consumption to laser energy, significantly improves workpiece to the absorptivity of laser.And since workpiece is to sharp
The absorptivity of light increases with the raising of temperature, and electric arc preheats welding base metal interface, and interface is made to start to be irradiated with a laser
When temperature increase, also further increase the absorptivity of laser, this welding manner so that laser and electric arc interaction,
Learn from other's strong points to offset one's weaknesses.
Patent of invention CN107498182A proposes a kind of compound molten bath concussion welding method of laser scanning-TIG, when welding,
Select laser scanning groove in preceding, TIG welding gun, after being welded on or before TIG welding gun is welded on, laser scanning groove is posterior
Two kinds of composite welding modes, and property of welded joint is improved to realize the stirring to molten bath by laser scanning welding molten bath.
As can be seen that laser scanning and TIG complex welding method are only proposed in the prior art, molten band compound for laser scanning-TIG
Welding does not relate to.
Patent of invention CN104259666A proposes a kind of aluminium alloy laser-TIG hybrid welding with filler wire method, aluminium before welding
Alloy opens double V-groove, then docks double V-groove aluminium alloy gapless, and laser, TIG welding gun and wire feeding mouth mention simultaneously when welding
It rises, control layers 1 and 2 welding condition is identical, and the 3rd layer of control is identical to the last layer welding condition, carries out
5-7 layers of filler wire welding, the final laser-TIG hybrid filler wire welding forming for realizing aluminium alloy.As can be seen that this method needs are more
Secondary silk filling, assembly precision require height, and it is multiple to greatly reduce laser-TIG so that welding process is unstable for gap bad adaptability
Close welding energy efficiency and stability.Molten welding compound for laser scanning-TIG does not relate to.
Summary of the invention
High, gap bad adaptability is required for laser-TIG hybrid filler wire welding assembly precision, welding process is unstable etc.
Problem proposes a kind of compound molten welding method of laser scanning-TIG.Method provided by the invention not only efficiently but also can make to weld
Journey is more stable, improves assemble welding gap tolerance, improves quality of weld seam molding.
To achieve the above object, the present invention is realized according to following technical scheme:
A kind of compound molten welding method of laser scanning-TIG is realized, packet by the compound molten band of laser scanning and TIG weld
It includes:
When welding, using the band-like welding wire with rectangular section, band-like welding wire is sent into workpiece gap to be welded by feed roller
Top, the width direction and welding direction of band-like welding wire are angled, and TIG welding gun one terminates the anode of power output end, band
Shape welding wire connects the cathode of power output end, and laser beam is scanned along welding direction, and scanning area half is located at band-like welding wire, and one
Half is located on molten bath, and the path of laser scanning has different modes according to different materials and welding requirements.
In above-mentioned technical proposal, the width of the band-like welding wire is 0.5~1.5mm, with a thickness of 0.2~0.4mm.
In above-mentioned technical proposal, the band-like welding wire and workpiece gap vertical range are 0.5~1mm, the gap size
For 0.4~1mm.
In above-mentioned technical proposal, the angular range between the width direction and welding direction of the band-like welding wire is 5~10
Degree.
In above-mentioned technical proposal, the distance range of eletrode tip to the band-like welding wire of the TIG welding gun is 1-5mm.
In above-mentioned technical proposal, the laser power range swashs in 500-6000W, welding current range in 10-200A
The scan frequency of light beam is in 2~500HZ, and for the sweep amplitude A of laser beam within the scope of 1/3B~B, B is weld pool width.
In above-mentioned technical proposal, the laser beam is round, ellipse, triangle along the path that welding direction is scanned
Shape, rectangle, zigzag, reciprocating parallel welding direction straight line and reciprocating vertical welding direction straight line path.
Compared with prior art, the present invention having the following beneficial effects:
It compares and Laser-TIG Hybrid Welding in addition to enhancing the effect of intercoupling of laser and electric arc clears up band-like weldering
The oxidation film in silk table face improves molten band efficiency, while by high-velocity scanning molten bath and band-like welding wire, realizing the steady mistake of molten drop
It crosses, substantially reduces the impact of the temperature gradient and molten drop of molten drop and molten bath to molten bath, to promote the droplet transfer, reduce weldering
The stability for connecing splashing, improving composite welding process.
Compared to the compound filler wire welding of conventional laser-TIG, using rectangular section band-like welding wire replace conventional bonding technique
In round welding wire, the gap allowed can reach the 50% of plate thickness, to the tolerance in gap when improving welding, reduce
Assembly precision when welding；
Using scanning galvanometer, the high speed deflection of galvanometer makes the continuous cyclically-varying of laser beam position, enhances laser to molten
The stirring action in pond makes up the deficiency that molten bath relies on merely surface tension driving to flow, extends molten bath setting time, be conducive to
The evolution of bubble, and inhibit the formation of solidification cracking.With the compound filler wire welding of existing laser-electric arc and laser scanning landfilling area
Connection technology is compared, and the present invention has stronger weld porosity rejection ability, can be eliminated weld porosity and be improved the machinery of weld seam
Performance.
Using the electric arc combined welding of laser scanning-, the energy of two kinds of heat sources is reduced, improves capacity usage ratio, is reduced
Production cost simplifies the process of manufacture and improves welding efficiency, while also improving the quality and mechanical properties of weld seam.
Connection for different metal materials, can be by selecting specific range and region to be scanned, this is for different
The connection of kind metal material has great advantages.By selectively scanning, thermal weld stress is controlled, and can preferably control
Brittle substance layer between metal processed, so as to improve the welding adaptability of difficult wlding material.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the compound molten welding method schematic diagram of laser scanning-TIG of the embodiment of the present invention.
Wherein, appended drawing reference: 1 is laser, and 2 be transmission fiber, and 3 be beam expanding lens, and 4 be galvanometer focusing device, and 5 be Y-axis
Galvanometer, 6 be X-axis galvanometer, and 7 be laser scanning region, and 8 be welded piece, and 9 be weld seam, and 10 be scanning laser beam, and 11 be to send band
Wheel, 12 be band-like welding wire, and 13 be TIG welding gun, and 14 be electric arc, and 15 be the source of welding current.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
A kind of compound molten welding method of laser scanning-TIG realized by the compound molten band of laser scanning and TIG weld,
It is characterized in that, comprising:
When welding, using the band-like welding wire with rectangular section, band-like welding wire is sent into workpiece gap to be welded by tape-feed
Top, the width direction and welding direction of band-like welding wire are angled, TIG welding gun one terminate power output end anode,
Band-like welding wire connects the cathode of power output end, and laser beam is scanned along welding direction, and scanning area half is located at band-like welding wire,
Half is located on molten bath, and the path of laser scanning has different modes according to different materials and welding requirements.
The width of band-like welding wire is 0.5~1.5mm in technical solution of the present invention, with a thickness of 0.2~0.4mm, the band
Shape welding wire and workpiece gap vertical range are 0.5~1mm, and the gap size is 0.4~1mm, the width of the band-like welding wire
Angular range between direction and welding direction is at 5~10 degree, and the eletrode tip of the TIG welding gun is to band-like welding wire apart from model
It encloses for 1-5mm, the laser power range is in 500-6000W, and welding current range is in 10-200A, and the scanning of laser beam frequency
Within the scope of 1/3B~B, B is weld pool width by 2~500HZ of rate, the sweep amplitude A of laser beam, and the laser beam is along welding direction
The path being scanned is circle, ellipse, triangle, rectangle, zigzag, reciprocating parallel welding direction straight line and reciprocating
Vertical welding direction straight line path.
When TIG weld, laser scans welding pool and band-like welding wire simultaneously, on the one hand enhances phase of the laser with electric arc
Mutual coupling effect increases fusion penetration, while replacing the round welding wire in conventional bonding technique using the band-like welding wire of rectangular section,
To the tolerance in gap when improving welding, assembly precision when welding is reduced.Still further aspect is enhanced using laser scanning
Stirring action of the laser to molten bath, reduces the impact of the temperature gradient and molten drop of molten drop and molten bath to molten bath, realizes
The smooth transition of molten drop makes up the deficiency that molten bath relies on merely surface tension driving to flow, extends molten bath setting time, favorably
In the evolution of bubble, and inhibit the formation of solidification cracking.Laser beam is a variety of multi-purpose along the path that welding direction is scanned, such as
Circle, ellipse, triangle, rectangle, zigzag, reciprocating parallel welding direction straight line and reciprocating vertical welding direction straight line
A variety of methods such as path scanning.Certainly the connection of different metal materials can also be directed to, can by select specific range and
Region is scanned, this has great advantages the connection of different metal materials.By selectively scanning, control weldering
Heat input is connect, and can preferably control brittle substance layer between metal, so as to improve the welding adaptability of difficult wlding material.
Fig. 1 is the compound molten welding method schematic diagram of laser scanning-TIG of the embodiment of the present invention；Embodiment one uses
The compound molten welding mode of laser scanning-TIG, relative positional relationship as shown in Figure 1.Feed roller 11 is sent into band-like welding wire 12
The top of welded piece weld seam 9, band-like welding wire 12 and 9 vertical range of weld seam are 1mm, make the width direction and weldering of band-like welding wire 12
Direction is connect into 5 degree, TIG welding gun 13 1 terminates the anode of 15 output end of the source of welding current, and band-like welding wire 12 connects the output of the source of welding current 15
The distance range of the cathode at end, eletrode tip to the band-like welding wire 12 of TIG welding gun 13 is 5mm, is passed through protective gas, flow is
20L/min, starting laser 1, the source of welding current 15 and feed roller 11, laser power 3000W, sending tape speed is 5m/min, control
X-axis galvanometer 6 and Y-axis galvanometer 5 in damping mirror focusing device 4, are scanned scanning laser beam 10 along welding direction, scanning area
7 half of domain is located at band-like welding wire 12, and half is located on weld seam 9, in certain frequency range according to round, ellipse, triangle
Shape, rectangle, zigzag, reciprocating parallel welding direction straight line and reciprocating vertical welding direction straight path and certain amplitude of oscillation
It realizes and swings, to realize laser beam in the scanning of workpiece weld seam 9 and band-like welding wire 12, as band-like welding wire 12 is constantly sent
Into under the action of TIG welding gun 13 and scanning laser beam 10, electric arc 14 starts to burn, while clearing up band-like 12 surface of welding wire
Oxidation film, band-like welding wire 12 and weld seam 9 constantly melt, and form molten bath, and solidify the cooling completion compound molten band of laser scanning-TIG
Welding.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (7)
1. a kind of compound molten welding method of laser scanning-TIG is realized by the compound molten band of laser scanning and TIG weld, special
Sign is, comprising:
When welding, using the band-like welding wire with rectangular section, band-like welding wire is sent into the top of workpiece gap to be welded by feed roller,
The width direction of band-like welding wire and welding direction are angled, and TIG welding gun one terminates the anode of power output end, band-like welding wire
The cathode of power output end is connect, laser beam is scanned along welding direction, and scanning area half is located at band-like welding wire, and half is located at
On molten bath, and the path of laser scanning has different modes according to different materials and welding requirements.
2. a kind of compound molten welding method of laser scanning-TIG according to claim 1, it is characterised in that: use laser
The compound molten welding mode of scanning-TIG, is passed through protective gas, starting laser, the source of welding current and feed roller, and control galvanometer gathers
X-axis galvanometer and Y-axis galvanometer in coke installation, are scanned scanning laser beam along welding direction, and scanning area half is located at band
Shape welding wire, half are located on weld seam, in certain frequency range according to circle, ellipse, triangle, rectangle, zigzag, past
Compound parallel welding direction straight line and reciprocating vertical welding direction straight path and certain amplitude of oscillation, which are realized, to be swung, to realize
Laser beam workpiece weld seam and band-like welding wire scanning, as band-like welding wire is constantly sent into, in TIG welding gun and scanning laser beam
Under the action of, electric arc starts to burn, while clearing up the oxidation film of band-like welding wire surface, and band-like welding wire and weld seam constantly melt, shape
At molten bath, and solidify the cooling completion compound molten welding of laser scanning-TIG.
3. a kind of compound molten welding method of laser scanning-TIG according to claim 1, it is characterised in that: described band-like
The width of welding wire is 0.5~1.5mm, with a thickness of 0.2~0.4mm.
4. a kind of compound molten welding method of laser scanning-TIG according to claim 1, it is characterised in that: described band-like
Welding wire and workpiece gap vertical range are 0.5~1mm, and the gap size is 0.4~1mm.
5. a kind of compound molten welding method of laser scanning-TIG according to claim 1, it is characterised in that: described band-like
Angular range between the width direction and welding direction of welding wire is at 5~10 degree.
6. a kind of compound molten welding method of laser scanning-TIG according to claim 1, it is characterised in that: the TIG
The distance range of the eletrode tip of welding gun to band-like welding wire is 1-5mm.
7. a kind of compound molten welding method of laser scanning-TIG according to claim 1, it is characterised in that: the laser
Power bracket is in 500-6000W, and welding current range is in 10-200A, and the scan frequency of laser beam is in 2~500HZ, laser beam
Sweep amplitude A within the scope of 1/3B~B, B is weld pool width.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961789A (en) * | 2019-11-26 | 2020-04-07 | 哈尔滨工业大学（威海） | Laser scanning-vibration hot wire TIG (tungsten inert gas) hybrid welding method |
| CN111515540A (en) * | 2020-04-26 | 2020-08-11 | 华北水利水电大学 | Thin plate T-shaped joint bilateral laser fuse welding device and welding method |
| CN111716003A (en) * | 2020-06-23 | 2020-09-29 | 华北水利水电大学 | Aluminum alloy pulse laser-TIG electric arc composite additive manufacturing device and method |
| CN112719599A (en) * | 2020-12-22 | 2021-04-30 | 南京中科煜宸激光技术有限公司 | Welding method for reducing generation rate of non-welding-through type welding pores of stainless steel |
| CN113231740A (en) * | 2021-04-23 | 2021-08-10 | 哈尔滨工业大学（威海） | Rear powder feeding welding method based on scanning laser |
| CN114012267A (en) * | 2021-11-19 | 2022-02-08 | 华能国际电力股份有限公司 | Gas turbine high-temperature component crack damage laser-electric arc hybrid welding method |
| CN115283870A (en) * | 2022-09-14 | 2022-11-04 | 西安优弧智熔增材制造有限公司 | Composite heat source additive manufacturing method and device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961789A (en) * | 2019-11-26 | 2020-04-07 | 哈尔滨工业大学（威海） | Laser scanning-vibration hot wire TIG (tungsten inert gas) hybrid welding method |
| CN111515540A (en) * | 2020-04-26 | 2020-08-11 | 华北水利水电大学 | Thin plate T-shaped joint bilateral laser fuse welding device and welding method |
| CN111515540B (en) * | 2020-04-26 | 2022-05-24 | 华北水利水电大学 | Laser fuse welding device and welding method for two sides of thin plate T-shaped joint |
| CN111716003A (en) * | 2020-06-23 | 2020-09-29 | 华北水利水电大学 | Aluminum alloy pulse laser-TIG electric arc composite additive manufacturing device and method |
| CN112719599A (en) * | 2020-12-22 | 2021-04-30 | 南京中科煜宸激光技术有限公司 | Welding method for reducing generation rate of non-welding-through type welding pores of stainless steel |
| CN113231740A (en) * | 2021-04-23 | 2021-08-10 | 哈尔滨工业大学（威海） | Rear powder feeding welding method based on scanning laser |
| CN114012267A (en) * | 2021-11-19 | 2022-02-08 | 华能国际电力股份有限公司 | Gas turbine high-temperature component crack damage laser-electric arc hybrid welding method |
| CN115283870A (en) * | 2022-09-14 | 2022-11-04 | 西安优弧智熔增材制造有限公司 | Composite heat source additive manufacturing method and device |
| CN115283870B (en) * | 2022-09-14 | 2024-02-02 | 西安优弧智熔增材制造有限公司 | Composite heat source additive manufacturing method and device |
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Application publication date: 20190809 |