CN109226968A - A kind of method of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding - Google Patents
A kind of method of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding Download PDFInfo
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- CN109226968A CN109226968A CN201811266749.5A CN201811266749A CN109226968A CN 109226968 A CN109226968 A CN 109226968A CN 201811266749 A CN201811266749 A CN 201811266749A CN 109226968 A CN109226968 A CN 109226968A
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- welding
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- scanning galvanometer
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Abstract
Proposed by the present invention is a kind of method of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding.Include the following steps: for the workpiece of welding to be fabricated to double-sided symmetrical narrow gap welding groove；Test specimen assembly；Groove and surrounding oxide skin, greasy dirt, rust, moisture content and other dirts are removed before weldering；Bottoming and filling welding are carried out in groove two sides using 2 sets of compound welding guns of scanning galvanometer laser-MAG.The present invention increases fusion penetration by the compound bottom welding of duplex scanning galvanometer-MAG and realizes root full penetration, welding efficiency is improved by two-sided narrow gap scanning galvanometer laser-MAG compound welding, Effective Regulation component postwelding residual stress simultaneously, welding deformation is controlled, to solve the problems, such as that root penetration is insufficient when slab Member Welding, sidewall fusion is bad, the carinate deformation of weld seam is big and welding efficiency is low.It is suitable for the method application as two-sided narrow gap scanning galvanometer laser-MAG compound welding.
Description
Technical field
The present invention relates to technical field of laser welding, in particular to a kind of scanning galvanometer laser-MAG compound welding.
Background technique
Currently, nuclear power, ocean engineering field slab are after first welding a face weld seam, to use carbon using traditional arc welding
The method that arc gouge welds another side weld seam in another side back chipping again, the disadvantage is that bevel angle is big, filling metal amount is big, welding effect
Rate is low, and welding deformation is big, poor welding quality.It is small using conventional laser welding spot diameter, height is required to fit-up gap, workpiece adds
Work required precision is high, and root penetration is difficult.Using traditional electric arc combined welder of laser-MAG during welding slab,
Laser beam moves linearly on workpiece to be welded, and welding bead side wall and interlayer are also easy to produce incomplete fusion, stomata, dreg defect.Using sweeping
It retouches galvanometer laser welding and increases molten bath area, improvement sidewall fusion, agitation molten pool reduction defect, raising laser using swing in high frequency
Adaptability is welded, can solve insufficient heavy wall Member Welding penetration, sidewall fusion and interlayer lack of fusion problem, but slab list
Face welding deformation is big, and welding efficiency is low.
In order to overcome in the prior art, welding efficiency is low, welding deformation is big, poor welding quality, assembly precision requirement height, root
Portion's penetration deficiency, side wall and interlayer are also easy to produce the defect of incomplete fusion, stomata, slag inclusion, are badly in need of a kind of novel welding method.
Summary of the invention
Incomplete fusion, stomata, slag inclusion are also easy to produce in order to solving root penetration in welding insufficient, side wall and interlayer to lack
It falls into, the invention proposes a kind of methods of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding.This method is by adopting
With the composite filled welding of duplex scanning galvanometer laser-MAG, increases molten bath area using the swing in high frequency of scanning galvanometer laser, change
The technical issues of kind sidewall fusion, agitation molten pool reduces defect, improves laser welding adaptability, solve laser welding.
The solution adopted by the present invention to solve the technical problem is that:
A kind of method of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding, comprising the following steps:
(1) boss is made in welded workpiece I, the machining of welded workpiece II and forms double-U-shaped narrow gap welding groove；
(2) welded workpiece I and welded workpiece II are assembled；
(3) cleaning for bonding groove and surrounding oxide skin, greasy dirt, rust, moisture content and other dirts；
(4) using the compound welding gun of preceding scanning galvanometer laser-MAG and the compound welding gun of rear scanning galvanometer laser-MAG in welding groove two
Side using 1.0~φ of φ 1.6mm welding wire carry out bottom welding, the MAG welding gun starting the arc of the compound welding gun of preceding scanning galvanometer laser-MAG,
The MAG welding gun starting the arc of the compound welding gun of scanning galvanometer laser-MAG after 6~20s of interval；6~10kW of laser power, spot diameter φ
0.1~φ 1.0mm, laser beam, which swings through flattened field mirror and is applied to laser beam on workpiece, forms laser spot, and hot spot is swung
0~3mm of range, galvanometer 50~200Hz of hunting frequency, chevilled silk 0~3mm of distance, 180~240A of arc current, arc voltage 20
~26V, 100~200mm/min of speed of welding, 80% carbon dioxide and 20% argon gas mixed gas flow are 15~25L/min；
(5) it is adopted using the compound welding gun of preceding scanning galvanometer laser-MAG and the compound welding gun of rear scanning galvanometer laser-MAG in groove two sides
Be filled welding with φ 1.0mm~φ 1.6mm welding wire, when welding before the compound welding gun of scanning galvanometer laser-MAG MAG welding gun
The starting the arc is spaced the MAG welding gun starting the arc of the compound welding gun of scanning galvanometer laser-MAG after 15~25s；6~10kW of laser power, hot spot
Diameter phi 0.1~φ 1.0mm, laser beam, which swings through flattened field mirror and is applied to laser beam on workpiece, forms laser spot, light
Spot 0~15mm of hunting range, galvanometer 50~200Hz of hunting frequency, chevilled silk 0~3mm of distance, 200~400A of arc current, electric arc
20~30V of voltage, speed of welding 200mm/min~2000mm/min, 80% carbon dioxide are with 20% argon gas mixed gas flow
15~25L/min.
Good effect realizes that root is complete since the present invention increases fusion penetration by the compound bottom welding of duplex scanning galvanometer-MAG
Penetration improves welding efficiency, while Effective Regulation component postwelding by two-sided narrow gap scanning galvanometer laser-MAG compound welding
Residual stress controls welding deformation, to solve when slab Member Welding that root penetration is insufficient, sidewall fusion is bad, weld seam ridge
The problem that shape deformation is big and welding efficiency is low.It is suitable for the side as sheet material double face narrow gap scanning galvanometer laser-MAG compound welding
Method application.
Detailed description of the invention
Fig. 1 is the welding groove form of plate welded workpiece；
Fig. 2 is the compound welding gun schematic diagram of scanning galvanometer laser-MAG；
Fig. 3 is forward and backward compound welding torch position schematic diagram.
In figure, X is galvanometer along X-axis adjusting laser beam, and Y is galvanometer along Y-axis adjusting laser beam, and Z adjusts for galvanometer along Z axis sharp
Light beam, 1, welded workpiece I, 2. welded workpieces II, 3.MAG welding gun, 4. laser spots, 5. flattened field mirrors, 6. laser beams, 7.
The compound welding gun of preceding scanning galvanometer laser-MAG, the compound welding gun of scanning galvanometer laser-MAG after 8..
Specific embodiment
Describe specific implementation case of the invention in detail below with reference to technical solution and attached drawing.
Embodiment 1
For SA838 GrB steel by length 1m, plate thickness for 80mm docks horizontal position welding welding procedure, welding implementation steps are illustrated
And process.
(1) boss is made in welded workpiece I 1, the machining of welded workpiece II 2 and forms double-U-shaped narrow gap welding slope
Mouthful；
(2) welded workpiece I and welded workpiece II are assembled；
(3) cleaning for bonding groove and surrounding oxide skin, greasy dirt, rust, moisture content and other dirts；
(4) using the compound welding gun 7 of preceding scanning galvanometer laser-MAG and the compound welding gun of rear scanning galvanometer laser-MAG 8 in welding groove
Two sides carry out bottom welding, 3 starting the arc of MAG welding gun of the compound welding gun of preceding scanning galvanometer laser-MAG, interval using φ 1.2mm welding wire
The MAG welding gun starting the arc of the compound welding gun of scanning galvanometer laser-MAG after 8s；Laser power 6kW, spot diameter φ 0.6mm, passes through tune
It saves X and realizes that laser beam 6 is adjusted in X-axis；Realize that laser beam is adjusted in Y-axis by adjusting Y；Realize laser beam in Z axis by adjusting Z
It adjusts, realizes laser beam jitter, so that laser beam is applied to formation laser spot 4 on workpiece by flattened field mirror 5, hot spot swings model
Enclose 2mm, galvanometer hunting frequency 60Hz, chevilled silk distance 2mm, arc current 200A, arc voltage 26V, speed of welding 200mm/
Min, 80% carbon dioxide and 20% argon gas mixed gas flow are 20L/min.
(5) using the compound welding gun 7 of preceding scanning galvanometer laser-MAG and the compound welding gun of rear scanning galvanometer laser-MAG 8 in groove
Two sides are filled welding using φ 1.2mm welding wire, when welding before the MAG welding gun 3 of the compound welding gun of scanning galvanometer laser-MAG rise
Arc is spaced 3 starting the arc of MAG welding gun of the compound welding gun of scanning galvanometer laser-MAG after 20s；Laser power 6kW, spot diameter φ
0.6mm realizes that laser beam 6 is adjusted in X-axis by adjusting X；Realize that laser beam is adjusted in Y-axis by adjusting Y；It is real by adjusting Z
Existing laser beam is adjusted in Z axis, realizes laser beam jitter, is applied to laser beam on workpiece by flattened field mirror 5 and is formed laser coke
Point 4, hot spot 3~15mm of hunting range, galvanometer hunting frequency 100Hz, chevilled silk distance 2mm, arc current 300A, arc voltage 26
~30V, speed of welding 500mm/min~1500mm/min, 80% carbon dioxide and 20% argon gas mixed gas flow are 25L/
min。
Embodiment 2
For A514 GrQ steel by length 1m, plate thickness for 114mm docks horizontal position welding welding procedure, welding implementation steps are illustrated
And process.
(1) boss is made in welded workpiece I 1, the machining of welded workpiece II 2 and forms double-U-shaped narrow gap welding slope
Mouthful；
(2) welded workpiece I and welded workpiece II are assembled；
(3) cleaning for bonding groove and surrounding oxide skin, greasy dirt, rust, moisture content and other dirts；
(4) using the compound welding gun 7 of preceding scanning galvanometer laser-MAG and the rear compound welding gun 8 of scanning galvanometer laser-MAG in groove two sides
Bottom welding is carried out using φ 1.2mm welding wire, when welding before the compound welding gun 7 of scanning galvanometer laser-MAG 3 starting the arc of MAG welding gun,
3 starting the arc of MAG welding gun of the compound welding gun 8 of scanning galvanometer laser-MAG after the 18s of interval；Laser power 8kW, spot diameter φ 0.6mm,
Realize that laser beam 6 is adjusted in X-axis by adjusting X；Realize that laser beam is adjusted in Y-axis by adjusting Y；Laser is realized by adjusting Z
Beam is adjusted in Z axis, realizes laser beam jitter, so that laser beam is applied to formation laser spot 4, light on workpiece by plane field lens 5
Spot hunting range 3mm, galvanometer hunting frequency 160Hz, chevilled silk distance 3mm, arc current 240A, arc voltage 26V, speed of welding
100mm/min, 80% carbon dioxide and 20% argon gas mixed gas flow are 25L/min.
(5) using the compound welding gun 7 of preceding scanning galvanometer laser-MAG and the compound welding gun of rear scanning galvanometer laser-MAG 8 in groove
Two sides are filled welding using φ 1.2mm welding wire, when welding before the MAG welding gun 3 of the compound welding gun of scanning galvanometer laser-MAG rise
Arc is spaced the MAG welding gun starting the arc of the compound welding gun of scanning galvanometer laser-MAG after 20s；Laser power 4kW, spot diameter φ
0.6mm realizes that laser beam is adjusted in X-axis by adjusting X；Realize that laser beam is adjusted in Y-axis by adjusting Y；It is realized by adjusting Z
Laser beam is adjusted in Z axis, is realized laser beam jitter, is applied to laser beam on workpiece by plane field lens 5 and forms laser spot
4, hot spot 3~15mm of hunting range, galvanometer hunting frequency 100Hz, chevilled silk distance 2mm, 360~400A of arc current, electric arc electricity
24~30V, speed of welding 1000mm/min~1500mm/min are pressed, 80% carbon dioxide is with 20% argon gas mixed gas flow
25L/min。
The features of the present invention:
1, using the compound bottom welding of duplex scanning galvanometer laser-MAG, can a 0~20mm of penetration, cancel gouge back chipping work
Sequence improves welding efficiency, reduces filling metal amount, compares arc welding, can reduce heat input and heat affected area.
2, using the compound bottom welding of scanning galvanometer laser-MAG, increase molten bath using the swing in high frequency of scanning galvanometer laser
Area expands workpiece fit-up gap window ranges, reduces Workpiece Machining Accuracy, improves laser welding adaptability.
3, using the composite filled welding of duplex scanning galvanometer laser-MAG, increased using the swing in high frequency of scanning galvanometer laser
Molten bath area improves sidewall fusion, and agitation molten pool reduces defect, improves laser welding adaptability, while laser energy also can be improved
Measure utilization rate.
4, using the composite filled welding of two-sided narrow gap scanning galvanometer laser-MAG, reduce filling metal amount, reduce
Heat input, Effective Regulation welding stress, controls welding deformation, saves welding material, improve welding efficiency.
Claims (1)
1. a kind of method of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding, it is characterized in that: the following steps are included:
(1) boss is made in welded workpiece I (1), welded workpiece II (2) machining and forms double-U-shaped narrow gap welding slope
Mouthful；
(2) welded workpiece I and welded workpiece II are assembled；
(3) cleaning for bonding groove and surrounding oxide skin, greasy dirt, rust, moisture content and other dirts；
(4) it is being welded using the compound welding gun of preceding scanning galvanometer laser-MAG (7) and the compound welding gun of rear scanning galvanometer laser-MAG (8)
Groove two sides carry out bottom welding, the MAG weldering of the compound welding gun of preceding scanning galvanometer laser-MAG using 1.0~φ of φ 1.6mm welding wire
Rifle (3) starting the arc is spaced the MAG welding gun starting the arc of the compound welding gun of scanning galvanometer laser-MAG after 6~20s；6~10kW of laser power,
Spot diameter φ 0.1~φ 1.0mm, laser beam (6) swing through flattened field mirror (5) make laser beam be applied on workpiece formed swash
Optical focus (4), hot spot 0~3mm of hunting range, galvanometer 50~200Hz of hunting frequency, chevilled silk 0~3mm of distance, arc current 180
~240A, 20~26V of arc voltage, 100~200mm/min of speed of welding, 80% carbon dioxide and 20% argon gas mixed gas stream
Amount is 15~25L/min；
(5) using the compound welding gun of preceding scanning galvanometer laser-MAG (7) and the compound welding gun of rear scanning galvanometer laser-MAG (8) in groove
Two sides are filled welding using φ 1.0mm~φ 1.6mm welding wire, when welding before the compound welding gun of scanning galvanometer laser-MAG
MAG welding gun (3) starting the arc is spaced the MAG welding gun starting the arc of the compound welding gun of scanning galvanometer laser-MAG after 15~25s；Laser power 6~
10kW, spot diameter φ 0.1~φ 1.0mm, laser beam (6), which swings through flattened field mirror (5), is applied to laser beam on workpiece
It is formed laser spot (4), hot spot 0~15mm of hunting range, galvanometer 50~200Hz of hunting frequency, chevilled silk 0~3mm of distance, electric arc
200~400A of electric current, 20~30V of arc voltage, speed of welding 200mm/min~2000mm/min, 80% carbon dioxide and 20%
Argon gas mixed gas flow is 15~25L/min.
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| CN201811266749.5A CN109226968A (en) | 2018-10-29 | 2018-10-29 | A kind of method of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding |
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| CN201811266749.5A CN109226968A (en) | 2018-10-29 | 2018-10-29 | A kind of method of sheet material double face narrow gap scanning galvanometer laser-MAG compound welding |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110539076A (en) * | 2019-09-19 | 2019-12-06 | 天津玛斯特车身装备技术有限公司 | protective gas for laser welding and laser welding method using same |
| CN110814552A (en) * | 2019-09-27 | 2020-02-21 | 渤海造船厂集团有限公司 | Scanning galvanometer laser-high frequency pulse TIG (tungsten inert gas) hybrid welding method |
| CN111014957A (en) * | 2019-12-20 | 2020-04-17 | 渤海造船厂集团有限公司 | Thick plate steel double-sided laser-TIG composite large-truncated-edge backing welding method |
| CN111014958A (en) * | 2019-12-20 | 2020-04-17 | 渤海造船厂集团有限公司 | Thick steel plate double-sided laser-MAG composite large-truncated-edge backing welding method |
| CN114012260A (en) * | 2021-11-19 | 2022-02-08 | 华能国际电力股份有限公司 | Laser welding repair method for crack damage of high-temperature component of gas turbine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110539076A (en) * | 2019-09-19 | 2019-12-06 | 天津玛斯特车身装备技术有限公司 | protective gas for laser welding and laser welding method using same |
| CN110814552A (en) * | 2019-09-27 | 2020-02-21 | 渤海造船厂集团有限公司 | Scanning galvanometer laser-high frequency pulse TIG (tungsten inert gas) hybrid welding method |
| CN111014957A (en) * | 2019-12-20 | 2020-04-17 | 渤海造船厂集团有限公司 | Thick plate steel double-sided laser-TIG composite large-truncated-edge backing welding method |
| CN111014958A (en) * | 2019-12-20 | 2020-04-17 | 渤海造船厂集团有限公司 | Thick steel plate double-sided laser-MAG composite large-truncated-edge backing welding method |
| CN114012260A (en) * | 2021-11-19 | 2022-02-08 | 华能国际电力股份有限公司 | Laser welding repair method for crack damage of high-temperature component of gas turbine |
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Application publication date: 20190118 |