CN104308362B - A kind of method of the carved punched part of laser welding - Google Patents
A kind of method of the carved punched part of laser welding Download PDFInfo
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- CN104308362B CN104308362B CN201410427518.3A CN201410427518A CN104308362B CN 104308362 B CN104308362 B CN 104308362B CN 201410427518 A CN201410427518 A CN 201410427518A CN 104308362 B CN104308362 B CN 104308362B
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- laser
- punched part
- welding
- welded
- edge
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Classifications
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
-
- 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
- B23K26/24—Seam welding
- B23K26/30—Seam welding of three-dimensional seams
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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 belongs to technical field of laser processing, it is provided that the method for the carved punched part of a kind of laser welding, including step: adjust laser facula and make its radius position dimension deviation more than carved punched part edge to be welded；Laser welding is carried out for track with carved punched part edge to be welded.The present invention makes its radius position dimension deviation more than carved punched part edge to be welded by adjusting laser facula, thus ensure that welding track covers in carved punched part edge to be welded, without departing from this edge, it is to avoid workpiece is by burn-through, it is achieved large-scale mass production.
Description
Technical field
The present invention relates to technical field of laser processing, the method particularly relating to the carved punched part of a kind of laser welding.
Background technology
Laser welding, as a kind of new welding technology, has that heat input is little, weld strength is high, easily to realize automatization etc. excellent
Point, is the most increasingly widely applied.
For welding of carved punched part such as kettle spout and kettle body, owing to original resistance-welding process needs first by manually grasping
Complete spot welding, then by manually using glue to seal the seam crossing of welding further, operation is more, automaticity
Relatively low, on the other hand, use glue sealing, be easily caused water body abnormal flavour, inadequate environmental protection, therefore, the most by laser welding
Progressively instead of original welding procedure, to reduce operation, it is achieved automation mechanized operation, laser welding can directly carry out close simultaneously
Envelope, improves product quality.
As a example by kettle spout welds with kettle body, the mode generally using edge seam welding is welded, as shown in Figure 1 and Figure 2.
Laser beam 1 is incident upon the edge that spout 2 connects with kettle body 3, forms welding track 4, the workpiece one integrated mass after welding,
Good looking appearance, and directly can judge welding effect by weld appearance.But, the carved punched part such as usual kettle spout, its
Dimensional tolerance is the biggest, adds the position deviation of fixture clamping, and after clamping workpiece, the position dimension deviation of its edge is just
Bigger.Carved punched part, according to its material and thickness, generally uses YAG pulse laser to weld, and YAG pulse swashs
The focus spot of light is less, and bigger position deviation makes laser facula easily deviate welding position, thus burn-through kettle body, it is impossible to real
Existing large-scale mass production.
Summary of the invention
The technical problem to be solved be to provide a kind of be applicable to the bigger carved punched part of position dimension deviation swash
Photocoagulation method.
For solving this problem, the present invention provides the method for the carved punched part of a kind of laser welding, comprises the following steps:
Adjust laser facula and make its radius position dimension deviation more than carved punched part edge to be welded；
Laser welding is carried out for track with described carved punched part edge to be welded.
Further, the step of described laser welding includes arranging laser waveform, and this waveform includes:
Laser power rises sharply the stage；
The high power maintenance stage；
The laser power rapid drawdown stage；
The low-power maintenance stage.
Further, the step of described adjustment laser facula includes:
Adjusting the position deviation focal position of laser of described edge to be welded, bias is+4～+6mm.
Further, the step of described laser welding also includes: arranging the Duplication of solder joint on laser welding track is every 1mm
2.5～3.5 solder joints are had on welding track.
Further, described laser soldering process also includes: arrange laser welding track along standard carved punched part edge fit to be welded
The S-shaped swing of edge.
Further, S-shaped amplitude of fluctuation is 0.1～0.3mm.
Further, laser power rises sharply stage duration 0.1～0.3ms, and this stage laser power maximum is 5～6kw.
Further, high power maintenance stage duration 1.0～1.5ms, laser power maintains 5～6kw.
Further, laser power rapid drawdown stage duration 0.4～0.6ms, this stage laser power minima is 1～1.2kw.
Further, low-power maintenance stage duration 2～3ms, laser power maintains 1～1.2kw.
Compared with prior art, the present invention makes its radius more than carved punched part edge to be welded by adjusting laser facula
Position dimension deviation, thus ensure that welding track covers in carved punched part edge to be welded, without departing from this edge,
Avoid workpiece by burn-through, it is achieved large-scale mass production.
Accompanying drawing explanation
Fig. 1, Fig. 2 are the welding schematic diagram of the seam welding mode of Laser edge；
Fig. 3 is the laser welding track of the present invention schematic diagram by position dimension deviation effects；
The laser waveform diagram that Fig. 4 is used by laser welding of the present invention；
Fig. 5 is the schematic diagram of the S-shaped swing of laser welding track of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
As it is shown on figure 3, B is the carved punched part of standard edge to be welded, A1, A2 represent respectively carved punched part to be welded with
The carved punched part of standard is in the position dimension deviation of edge to be welded, and actual edge to be welded is positioned at B1 or B2,
And according to the carved punched part of standard set welding track at B, therefore, if laser facula is the least, be not enough to cover completely
Cover this position dimension deviation, may result in hot spot and deviate the position and burn-through workpiece that should carry out welding.
Carved punched part general size tolerance is relatively big, and as a example by kettle, spout dimensional tolerance is about 0.4mm, adds fixture
The position deviation of clamping, after clamping, spout connects with kettle body, and to reach 0.8mm even more big for the position dimension deviation of edge,
And the focus spot of YAG pulse laser is the least, its spot radius R≤0.8mm, therefore it is easily caused burn-through kettle body.Its
His carved punched part the most various home electric shell, auto parts machinery etc. there is also same problem.
In order to avoid the problems referred to above, need to adjust laser facula and make its radius position more than carved punched part edge to be welded
Dimensional discrepancy, as a example by kettle, i.e. laser facula radius need to connect with kettle body the position dimension deviation of edge more than spout.
At present, YAG pulse laser is many by fiber-optic transfer to plumb joint, in order to obtain bigger laser facula, to adapt to work
The position dimension deviation that part is bigger, the FSI-600um optical fiber that configuration core diameter is bigger, and the collimation lens of focal length 80-100mm
With the focusing lens of focal length 220-250mm, under this configuration, the laser facula of radius about 0.8mm can be obtained at focal point.
For obtaining bigger hot spot further in welding position, take the mode of positive out of focus to weld, i.e. adjust welding position
Deviation focal position of laser, bias is+4～+6mm, i.e. relatively welding position, focal position is closer to focusing lens, two positions
Difference be 4～6mm, the laser form of positive out of focus position is more stable, it is ensured that more stable welding effect.Can obtain in this position
Obtaining the laser facula of diameter 2-3mm, even if workpiece edge to be welded position deviation is more than 0.8mm, hot spot remains to cover and is somebody's turn to do
Edge.
Obtain bigger laser facula in welding position, wider weld seam can be obtained, but correspondingly laser power density is relatively low,
Laser energy required during welding is the biggest, therefore easy burn-through workpiece or form bigger back of the body trace.For avoiding this problem,
Laser is set and uses specific waveform.
For the kettle spout that wall thickness is 0.5～0.8mm and kettle body, edit pulse laser waveform as shown in Figure 4, this waveform
Including:
Arranging the T1 time period is that laser power rises sharply the stage, and duration 0.1～0.3ms is rapid at this time period inner laser power
Being increased to 5～6kw, the T1 time period generally arranges the shortest, because if laser power rises slowly, then and may be because of
Laser pulse width is big, thermal accumlation is big and makes workpiece by burn-through；
Arranging the T2 time period is the high power maintenance stage, and duration 1.0～1.5ms maintains at this time period inner laser power
5～6kw；Within T1, T2 time period, surface of the work is affected by high heat and is melted rapidly, in order to ensure that workpiece is only located
Being unlikely in surface melting state by burn-through, i.e. T2 time period time that high power maintains generally arranges shorter；
Under above-mentioned short time high power effect, the energy of laser output is also not enough so that workpiece is fused together, for making metal
Can be fused together without regard to by burn-through, arranging the T3 time period is the laser power rapid drawdown stage, duration 0.4～0.6ms,
Being down to 1～1.2kw at this time period inner laser power, for aforementioned high-power 20%, same, the T3 time period generally also sets
Put the shortest, because if laser power declines slowly, then may big because of laser pulse width, thermal accumlation big and makes work
Part is by burn-through；
Arranging the T4 time period is the low-power maintenance stage, and duration 2～3ms, power maintains 1～1.2kw, at T3, T4
In time period, molten metal the most is fused together under effect low in calories, without regard to because of laser power the biggest
Heat is the highest and burn-through workpiece.
The time of above-mentioned waveform and power parameter are applicable to the carved punched part that thickness is 0.5～0.8mm, if song to be welded
The thickness of face stamping parts changes, then its parameter also to change accordingly.
In order to obtain good welding effect further, arranging pulse laser frequency (unit is Hz) numerical value is that speed of welding is (single
Position is mm/s) 2.5～3.5 times of numerical value, i.e. making the Duplication of solder joint on welding track is to have on every 1mm welding track
2.5～3.5 solder joints, solder joint overlap is ensured to form the weld seam sealed.But the Duplication of solder joint can not be too high, otherwise
Compared with big and burn-through workpiece because of heat input or weld seam back of the body trace may be caused excessive and have to increase follow-up surface and process
Operation.
There is to make laser welding adapt to further the workpiece of bigger position dimension deviation, weld increasing laser facula
While, it is also possible to setting welding track is along the S-shaped swing of B of the carved punched part of standard edge to be welded, and amplitude of fluctuation is
0.1～0.3mm, every 6 solder joints complete a S-shaped and swing, as shown in Figure 5.The track swung in S further increases
Weld width, improves the cover width of weldering speckle, when there is bigger position dimension deviation in carved punched part edge to be welded still
Good welding effect can be obtained.
Claims (6)
1. a method for the carved punched part of laser welding, comprises the following steps:
Adjust laser facula and make its radius position dimension deviation more than carved punched part edge to be welded；
Carrying out laser welding with described carved punched part edge to be welded for track, the step of laser welding includes:
Laser welding track is set along the S-shaped swing in the carved punched part of standard edge to be welded, this S-shaped amplitude of fluctuation be 0.1～
0.3mm；
Arranging laser waveform, this waveform includes: laser power rises sharply the stage；The high power maintenance stage；Laser power rapid drawdown rank
Section；The low-power maintenance stage；
Arranging the Duplication of solder joint on laser welding track is to have 2.5～3.5 solder joints on every 1mm welding track.
Method the most according to claim 1, it is characterised in that the step of described adjustment laser facula includes:
Adjusting the position deviation focal position of laser of described edge to be welded, bias is+4～+6mm.
Method the most according to claim 1, it is characterised in that: laser power rises sharply stage duration 0.1～0.3ms, this stage
Laser power maximum is 5～6kw.
Method the most according to claim 1, it is characterised in that: high power maintenance stage duration 1.0～1.5ms, laser merit
Rate maintains 5～6kw.
Method the most according to claim 1, it is characterised in that: laser power rapid drawdown stage duration 0.4～0.6ms, these rank
Section laser power minima is 1～1.2kw.
Method the most according to claim 1, it is characterised in that: low-power maintenance stage duration 2～3ms, laser power maintains
1～1.2kw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410427518.3A CN104308362B (en) | 2014-08-27 | 2014-08-27 | A kind of method of the carved punched part of laser welding |
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| CN201410427518.3A CN104308362B (en) | 2014-08-27 | 2014-08-27 | A kind of method of the carved punched part of laser welding |
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| CN104308362B true CN104308362B (en) | 2016-08-24 |
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| CN104999179A (en) * | 2015-08-04 | 2015-10-28 | 大族激光科技产业集团股份有限公司 | Laser welding method for large-gap weld |
| US20200072266A1 (en) * | 2017-05-22 | 2020-03-05 | Eagle Industry Co., Ltd. | Metal joining structure and metal welding method |
| JP6689238B2 (en) * | 2017-08-24 | 2020-04-28 | 株式会社Ｉｈｉ検査計測 | Temporary welding method and temporary welding apparatus |
| CN107442935A (en) * | 2017-08-31 | 2017-12-08 | 北京航星机器制造有限公司 | A kind of aluminium alloy laser oscillating welding technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2242139A1 (en) * | 1998-06-29 | 1999-12-29 | Automated Welding Systems Incorporated | Method of laser welding tailored blanks |
| CN100544882C (en) * | 2006-07-04 | 2009-09-30 | 华中科技大学 | Plate-bending online laser welding technology and equipment thereof |
| CN101450422B (en) * | 2008-12-17 | 2011-05-04 | 深圳市大族激光科技股份有限公司 | Laser welding method of film aluminum product |
| CN101537534B (en) * | 2009-04-20 | 2011-04-06 | 西安天瑞达光电技术发展有限公司 | Superimposing method of circular light spot laser shock strengthening tracks |
| JP5760951B2 (en) * | 2011-10-31 | 2015-08-12 | 三菱電機株式会社 | Laser welding method |
| CN103386550B (en) * | 2013-07-31 | 2015-05-20 | 大族激光科技产业集团股份有限公司 | Laser welding method for watch band |
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Address after: No. 9988 Nanshan District Shennan Road Shenzhen city Guangdong province 518000 Applicant after: HANS LASER TECHNOLOGY INDUSTRY GROUP CO., LTD. Address before: 518000 Shenzhen Province, Nanshan District high tech park, North West New Road, No. 9 Applicant before: Dazu Laser Sci. & Tech. Co., Ltd., Shenzhen |
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