CN102059452B - Narrow gap three-beam laser welding method - Google Patents
Narrow gap three-beam laser welding method Download PDFInfo
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- CN102059452B CN102059452B CN201010600708.2A CN201010600708A CN102059452B CN 102059452 B CN102059452 B CN 102059452B CN 201010600708 A CN201010600708 A CN 201010600708A CN 102059452 B CN102059452 B CN 102059452B
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Abstract
The invention discloses a narrow gap three-beam laser welding method, and belongs to the technical field of laser processing. The method solves the problem of poor transition stability of welding wire metal molten drops in the conventional swinging or rotating double-beam welding method. In the welding process of the method, a main beam emitted by a laser device is split into three welding beams, the energy of the three welding beams is one third of the energy of the main beam respectively, and three focusing light spots of the three welding beams in a narrow gap weld groove are arranged in parallel or in a regular triangle. The method is suitable for narrow gap laser welding.
Description
Technical field
The present invention relates to a kind of narrow gap three beam laser welding methods, belong to technical field of laser processing.
Background technology
In existing narrow gap laser light welding with filler wire method, the single beams that adopt weld more, dual-beam welding, swing or the welding of rotation dual-beam, and the shortcoming of employing single beam welding is, laser spot diameter is very little, heat effect region is little, is prone to sidewall incomplete fusion phenomenon, affects welding quality.While adopting dual-beam welding, although improved the heat effect region of welding, but two light beams act on both sides, weld seam molten bath, and center, molten bath does not have the effect of laser beam, can make center, molten bath stir insufficient, easily produce pore, and filler wire is generally positioned at weld seam center, the laser beam of both sides fails to provide sufficient heat melts welding wire, and deposited metals loading is less, easily produce the defects such as lack of inter-run fusion, affect property of welded joint.Adopt when swinging or rotating dual-beam welding, swing or rotation due to light beam, the stirring action in light beam butt welded seam molten bath strengthens, reduced weld porosity, but the movement of light beam has reduced the stability of welding wire metal drop transition, welding wire filling effect is affected, makes thus the use swinging or rotation dual-beam is welded in narrow gap laser light silk filling welding still have some limitations.
Summary of the invention
The problem that the object of the invention is to exist in order to solve existing swing or rotation dual-beam welding method welding wire metal drop transition poor stability, provides a kind of narrow gap three beam laser welding methods.
The inventive method is in welding process, the main beam that laser instrument is sent is divided into three beams welding light beam, the energy of described three beams welding light beam is respectively 1/3rd of main beam energy, three focal beam spot parallel arranged that described three beams welding light beam forms in narrow gap weld seam groove or be equilateral triangle and arrange.
Advantage of the present invention is: the inventive method has realized the function of three divided beams by two beam splitting chips and two reflective focus lamps, make the energy of laser beam can reasonable distribution, and the position of adjustable welding beam focus, there is easy realization, advantage easy to use.
The inventive method has realized the laser beam effect in narrow gap weld seam groove left side, center and San Ge position, right side, the laser weld light beam of both sides has solved the welding sidewall incomplete fusion problem existing in narrow gap laser light welding with filler wire method, the second welding light beam at center not only provides enough heat melts welding wires, and three light beam all can move along welding direction, the transition of welding wire metal drop is stable, has improved welding quality.
Accompanying drawing explanation
Fig. 1 is Fundamentals of Welding schematic diagram of the present invention;
Fig. 2 is the schematic diagram of focal beam spot parallel arranged in narrow gap weld seam groove of the first welding light beam, the second welding light beam and the 3rd welding light beam formation, in figure, A is the focal beam spot that the first welding light beam forms, B is the focal beam spot that the second welding light beam forms, C is the focal beam spot that the 3rd welding light beam forms, and in figure, arrow is depicted as welding direction;
Fig. 3 is the schematic diagram that the first welding light beam, the second welding light beam and the 3rd welding light beam are triangularly arranged in narrow gap weld seam groove, in figure, A is the focal beam spot that the first welding light beam forms, B is the focal beam spot that the second welding light beam forms, C is the focal beam spot that the 3rd welding light beam forms, and in figure, arrow is depicted as welding direction.
The specific embodiment
The specific embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 3, present embodiment is in welding process, the main beam that laser instrument is sent is divided into three beams welding light beam, the energy of described three beams welding light beam is respectively 1/3rd of main beam energy, three focal beam spot parallel arranged that described three beams welding light beam forms in narrow gap weld seam groove or be equilateral triangle and arrange.
Present embodiment is a kind of laser welding with filler wire method, it has solved when narrow gap laser light fills silk welding and has easily occurred pore, sidewall incomplete fusion, lack of inter-run fusion and the unsettled problem of welding wire metal drop transition, has filled up the deficiency in existing laser welding technology.
The specific embodiment two: below in conjunction with Fig. 1 to Fig. 3, present embodiment is described, present embodiment is for to the further illustrating of embodiment one, and the implementation method that the described main beam that laser instrument is sent is divided into three beams welding light beam is:
After making main beam by the first beam splitting chip 1-1, be divided into the first transmitted light beam and the first folded light beam, the first folded light beam forms the first welding light beam after the first reflective focus lamp 2-1 focuses on, the focal beam spot that described the first welding light beam forms is in a side of narrow gap weld seam groove
The first transmitted light beam is divided into the second transmitted light beam and the second folded light beam after by the second beam splitting chip 1-2, the second transmitted light beam is again by rear formation the second welding light beam of transmission-type focus lamp 3, the focal beam spot that described the second welding light beam forms is at the center of narrow gap weld seam groove
The second folded light beam forms the 3rd welding light beam after the second reflective focus lamp 2-2 focuses on, and the described the 3rd welds the focal beam spot of light beam formation at the opposite side of narrow gap weld seam groove,
The focal beam spot that described the first welding light beam, the second welding light beam and the 3rd welding light beam form parallel arranged or be equilateral triangle and arrange in narrow gap weld seam groove.
Shown in Fig. 1, formed focal beam spot that three welding light beams the form parallel arranged in the narrow gap weld seam groove.
The specific embodiment three: present embodiment is further illustrating embodiment two, the transmitted light beam of described the first beam splitting chip 1-1 accounts for 2/3rds of incident beam gross energy, and the folded light beam of this first beam splitting chip 1-1 accounts for 1/3rd of incident beam gross energy.
The specific embodiment four: present embodiment is for to the further illustrating of embodiment three, and described the second beam splitting chip 1-2 is half-transmitting and half-reflecting mirror.
On the basis of embodiment three, adopt half-transmitting and half-reflecting mirror again the first transmitted light beam to be carried out to beam splitting, the energy of the second transmitted light beam producing is 1/2nd of the first transmitted light beam energy, the energy of the second folded light beam producing is 1/2nd of the first transmitted light beam energy, because the first transmitted light beam accounts for 2/3rds of main beam gross energy, therefore final the first welding light beam forming, the second welding light beam and the 3rd welding light beam respectively account for 1/3rd of main beam gross energy.
The specific embodiment five: present embodiment is for to the further illustrating of embodiment four, and described the first beam splitting chip 1-1, the second beam splitting chip 1-2, the first reflective focus lamp 2-1 and the second reflective focus lamp 2-2 all can be around the optical axis rotations of main beam.
The specific embodiment six: present embodiment is for to the further illustrating of embodiment five, and described the first reflective focus lamp 2-1 and the second reflective focus lamp 2-2 all can be along the optical axis direction parallels perpendicular to main beam.
The first reflective focus lamp 2-1 described in present embodiment and the second reflective focus lamp 2-2 can parallels, so that the position of fine adjustment focused spot.
The specific embodiment seven: present embodiment is described below in conjunction with Fig. 3, on the basis of each module position shown in Fig. 1, described the first beam splitting chip 1-1 and the first reflective focus lamp 2-1 are rotated to 60 ° around main beam optical axis, the second beam splitting chip 1-2 and the second reflective focus lamp 2-2 are rotated to-60 ° around main beam optical axis, can realize focal beam spot that three welding light beams the form equilateral triangle in narrow gap weld seam groove and arrange, its is especially applicable to the welding of ultra-narrow gap laser.
Claims (5)
1. narrow gap three beam laser welding methods, is characterized in that:
In welding process, the main beam that laser instrument is sent is divided into three beams welding light beam, the energy of described three beams welding light beam is respectively 1/3rd of main beam energy, three focal beam spot parallel arranged that described three beams welding light beam forms in narrow gap weld seam groove or be equilateral triangle and arrange;
The implementation method that the described main beam that laser instrument is sent is divided into three beams welding light beam is:
Make main beam pass through to be divided into the first transmitted light beam and the first folded light beam after the first beam splitting chip (1-1), the first folded light beam forms the first welding light beam after the first reflective focus lamp (2-1) focuses on, the focal beam spot that described the first welding light beam forms is in a side of narrow gap weld seam groove
The first transmitted light beam is divided into the second transmitted light beam and the second folded light beam after by the second beam splitting chip (1-2), the second transmitted light beam is again by forming the second welding light beam after transmission-type focus lamp (3), the focal beam spot that described the second welding light beam forms is at the center of narrow gap weld seam groove
The second folded light beam forms the 3rd welding light beam after the second reflective focus lamp (2-2) focuses on, and the described the 3rd welds the focal beam spot of light beam formation at the opposite side of narrow gap weld seam groove,
The focal beam spot that described the first welding light beam, the second welding light beam and the 3rd welding light beam form parallel arranged or be equilateral triangle and arrange in narrow gap weld seam groove.
2. narrow gap according to claim 1 three beam laser welding methods, it is characterized in that: the transmitted light beam of described the first beam splitting chip (1-1) accounts for 2/3rds of incident beam gross energy, the folded light beam of this first beam splitting chip (1-1) accounts for 1/3rd of incident beam gross energy.
3. narrow gap according to claim 2 three beam laser welding methods, is characterized in that: described the second beam splitting chip (1-2) is half-transmitting and half-reflecting mirror.
4. narrow gap according to claim 3 three beam laser welding methods, is characterized in that: described the first beam splitting chip (1-1), the second beam splitting chip (1-2), the first reflective focus lamp (2-1) and the second reflective focus lamp (2-2) all can be around the optical axis rotations of main beam.
5. narrow gap according to claim 4 three beam laser welding methods, is characterized in that: described the first reflective focus lamp (2-1) and the second reflective focus lamp (2-2) all can be along the optical axis direction parallels perpendicular to main beam.
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| CN201010600708.2A CN102059452B (en) | 2010-12-22 | 2010-12-22 | Narrow gap three-beam laser welding method |
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| CN201010600708.2A CN102059452B (en) | 2010-12-22 | 2010-12-22 | Narrow gap three-beam laser welding method |
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Cited By (1)
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|---|---|---|---|---|
| US11806808B2 (en) * | 2016-12-26 | 2023-11-07 | Arcelormittal | Method for butt laser welding two metal sheets |
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| CN103252578A (en) * | 2012-02-17 | 2013-08-21 | 沈阳新松机器人自动化股份有限公司 | Method for narrow-gap laser welding with filler wires for superconducting coil box |
| CN102922136B (en) * | 2012-11-20 | 2015-03-04 | 哈尔滨工业大学 | Dual-light beam laser welding method of K-shaped joint |
| CN103056523A (en) * | 2012-11-29 | 2013-04-24 | 中国航空工业集团公司北京航空制造工程研究所 | Multi-beam laser welding method |
| CN104801852B (en) * | 2015-04-17 | 2016-10-19 | 温州大学 | A kind of beam splitting double focus laser Machining head |
| JP6241459B2 (en) * | 2015-07-31 | 2017-12-06 | トヨタ自動車株式会社 | Manufacturing method of welded structure |
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| WO2019189927A1 (en) * | 2018-03-30 | 2019-10-03 | 古河電気工業株式会社 | Welding method and welding device |
| CN108788450B (en) * | 2018-06-26 | 2020-12-01 | 大族激光科技产业集团股份有限公司 | Laser processing equipment and laser processing head thereof |
| CN111673281B (en) * | 2020-06-04 | 2021-03-12 | 吉林大学 | Welding method for welding aluminum/steel dissimilar metal by using three beams of laser |
| CN111673282B (en) * | 2020-06-04 | 2021-03-12 | 吉林大学 | Welding method for aluminum/steel welding by using three-beam laser |
| CN116441728B (en) * | 2023-06-15 | 2023-08-22 | 广东海洋大学 | Three-laser-beam assembly line device and method for welding dissimilar materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11806808B2 (en) * | 2016-12-26 | 2023-11-07 | Arcelormittal | Method for butt laser welding two metal sheets |
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