CN106583925A - Laser welding method for galvanized steel sheets for automobile - Google Patents
Laser welding method for galvanized steel sheets for automobile Download PDFInfo
- Publication number
- CN106583925A CN106583925A CN201611112492.9A CN201611112492A CN106583925A CN 106583925 A CN106583925 A CN 106583925A CN 201611112492 A CN201611112492 A CN 201611112492A CN 106583925 A CN106583925 A CN 106583925A
- Authority
- CN
- China
- Prior art keywords
- laser
- welded
- galvanized steel
- laser welding
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B23K26/244—Overlap seam welding
-
- 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
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
-
- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
The invention provides a laser welding method for galvanized steel sheets for an automobile. The laser welding method eliminates the influence of zinc vapor on welding in the prior art. The laser welding method comprises the steps that firstly, the galvanized steel sheets are fixed to a tool clamp adopting laser cleaning, the position of a laser cleaning robot is adjusted, the first pulse laser with the average power of 300 W-450 W is adopted, primary scanning is conducted on portions to be welded of the galvanized steel sheets, and the zinc coating layers of the portions to be welded are removed; secondly, the second pulse laser with the average power of 80 W-200 W is adopted, secondary scanning is conducted on the portions to be welded of the galvanized steel sheets, and yellowing layers of the portions to be welded are removed; thirdly, the portions to be welded of the two galvanized steel plates without the yellowing layers are connected in a lap joint manner and clamped by a tool clamp adopting laser lap joint; and fourthly, the two galvanized steel plates are welded together at the portions to be welded through laser welding.
Description
Technical field
The present invention relates to the method for laser welding of field of laser processing, more particularly to Progress in Automobile Galvanized Steel Sheets.
Background technology
Galvanized steel plain sheet is used widely with its specific strength height, low cost and excellent corrosion resistance, especially in vapour
The fields such as turner industry.Meanwhile, laser lap welding technology is also extensively applied in the welding of Progress in Automobile Galvanized Steel Sheets.
When being welded using laser lap, the volatilization of zinc coat between two plates has a strong impact on the quality of welding point.Zinc it is molten
Point and boiling point are respectively about 420 DEG C and 907 DEG C, more much lower than the fusing point (1535 DEG C) of steel, therefore, carrying out laser lap weldering
When, the zinc fume of zinc coat evaporation has percussion to welding pool, reduces the stability in molten bath, and high pressure zinc fume overflows to be caused
There is serious gas hole defect in weld seam, meanwhile, part zinc fume also can be remained in molten bath, form pore.
Currently for the weldering of galvanized steel plain sheet laser lap, there is the method that two kinds of suppression zinc coats affect welding quality, one is, weldering
The front method for removing zinc coat, two are, control the method that two plates overlap gap.The method of zinc coat is removed before weldering includes acid, alkali
Wash and mechanical grinding.Acid, alkali cleaning remove the method for zinc coat easily aoxidizes steel matrix, and the removal area of zinc coat can not
Control.Mechanical grinding removes the method for zinc coat can make matrix more cut occur, be unfavorable for the japanning of postwelding vehicle body.Control two plates
The method in overlap joint gap typically adopts cushion block, is provided for excluding zinc fume between the galvanized steel plain sheet that will carry out overlapping welding
Gap, then carry out laser lap weldering.But in actual production, gap is difficult to control to, and the too little then zinc fume in gap cannot
Discharge, gap is excessive, and dry joint phenomenon occurs.
Need to find a kind of impact of suppression zinc fume to molten bath in prior art, improve the welding of Progress in Automobile Galvanized Steel Sheets
The method of quality.
The content of the invention
The invention aims to provide a kind of method for laser welding of Progress in Automobile Galvanized Steel Sheets, to solve prior art in
Impact of the zinc fume to the welding of Progress in Automobile Galvanized Steel Sheets.
To achieve these goals, the invention provides a kind of method for laser welding of Progress in Automobile Galvanized Steel Sheets, including：
Step one, galvanized steel plain sheet is fixed on the frock clamp of laser cleaning, adjusts the position of laser cleaning machine people,
Adopt mean power for 300～450W the first pulse laser, first time scanning is carried out to the position to be welded of the galvanized steel plain sheet,
Remove the zinc coat at the position to be welded；
Step 2, adopt mean power for 80～200W the second pulse laser, to the described to be welded of the galvanized steel plain sheet
Position carries out second scanning, removes the yellow layer at the position to be welded；
Step 3, the position described to be welded for eliminating two pieces of galvanized steel plain sheets of the yellow layer is overlapped, and is adopted
Clamped with the frock clamp of laser lap；
Step 4：Using laser welding two pieces of galvanized steel plain sheets are welded together at the position to be welded.
Preferably, in above-mentioned method, the mean power of first pulse laser is 400W.
Preferably, the mean power of second pulse laser is 80W.
Preferably, the pulse width of first pulse laser is 10～100ns, and pulse frequency is 10kHz.
Preferably, the pulse width of second pulse laser is 10～100ns, and pulse frequency is 10kHz.
Preferably, the scanning speed of the first time scanning is 0.48m/min；The scanning speed of second scanning is
0.48m/min。
Preferably, the laser power of the laser welding is 2kW, and laser positive out of focus are 4mm, and speed of welding is 1.8m/
min。
The embodiment of the present invention has following technique effect：
In the embodiment of the present invention, removed using laser technology controllable precise on the nearly position while welding of galvanized sheet overlapping regions,
The zinc coat of lower surface, and the steel plate after laser cleaning is welded using laser lap welding method, zinc fume is effectively inhibited to molten
The impact in pond, improves welding quality.
According to the detailed description below in conjunction with accompanying drawing to the specific embodiment of the invention, those skilled in the art will be brighter
Above-mentioned and other purposes, the advantages and features of the present invention.
Description of the drawings
Describe some specific embodiments of the present invention in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
The step of Fig. 1 is the inventive method embodiment flow chart.
Specific embodiment
The step of Fig. 1 is an embodiment of the method for the invention flow chart, as shown in figure 1, the embodiment of the present invention provides a kind of
The method for laser welding of Progress in Automobile Galvanized Steel Sheets, including：
Step 101, galvanized steel plain sheet is fixed on the frock clamp of laser cleaning, adjusts the position of laser cleaning machine people
Put, adopt mean power for 300～450W the first pulse laser, the position to be welded of the galvanized steel plain sheet is carried out to sweep for the first time
Retouch, remove the zinc coat at the position to be welded；
Step 102, adopt mean power for 80～200W the second pulse laser, to the described to be welded of the galvanized steel plain sheet
Position carries out second scanning, removes the yellow layer at the position to be welded；
Step 103, the position described to be welded for eliminating two pieces of galvanized steel plain sheets of the yellow layer is overlapped, and is adopted
Clamped with the frock clamp of laser lap；
Step 104：Using laser welding two pieces of galvanized steel plain sheets are welded together at the position to be welded.
Therefore, the embodiment of the present invention is to take galvanized steel plain sheet to be fixed on the frock clamp of laser cleaning, adjusts laser cleaning
The position of robot, carries out respectively pulse laser scanning twice to position to be welded, and scanning for the first time removes the plating on galvanized steel plain sheet
Zinc layers, second scanning is removed and scan for the first time left yellow layer, will be carried out through the galvanized steel plain sheet of laser scanning twice
Overlap joint, is fixed using lapwork's dress, and welding is carried out in position to be welded using laser welding.
From the foregoing, it will be observed that in the embodiment of the present invention, laser technology controllable precise ground removes the nearly weld seam position of galvanized sheet overlapping regions
The zinc coat on upper and lower surface is put, and the steel plate after laser cleaning is welded using laser lap welding method, effectively inhibit zinc fume
Impact to molten bath, improves welding quality.
Wherein, in step 101, scanning for the first time uses 300～450W pulse lasers, using high energy density laser Shu Chong
Galvanized sheet Zinc coat is hit, makes most of zinc coat gasification depart from surface, but high energy density laser beam can make galvanized sheet
There is yellow layer in surface, needs to remove surface yellow layer, and in step 102, second scanning uses 80～200W pulse lasers, profit
Surface yellow layer is removed with low energy densities laser beam.After using laser is removed the zinc coat at place to be welded, two boards are taken
It is connected together, makes cleaning area overlap, laser welding is carried out to the steel plate after cleaning using laser beam.Through the present invention
Method, the section of weld joint of laser lap weldering, the weld defect such as flawless, pore, slag inclusion, upper and lower galvanized steel plain sheet fusion character is good
It is good.
In one embodiment of the present of invention, the mean power of first pulse laser is 400W.
In one embodiment of the present of invention, the mean power of second pulse laser is 80W.
In one embodiment of the present of invention, the pulse width of first pulse laser is 10～100ns, and pulse frequency is
10kHz。
In one embodiment of the present of invention, the pulse width of second pulse laser is 10～100ns, and pulse frequency is
10kHz。
In one embodiment of the present of invention, the scanning speed of the first time scanning is 0.48m/min；It is described to sweep for the second time
The scanning speed retouched is 0.48m/min.
In one embodiment of the present of invention, the laser power of the laser welding is 2kW, and laser positive out of focus are 4mm, are welded
Speed is 1.8m/min.
Using the method for laser welding of the Progress in Automobile Galvanized Steel Sheets of above-mentioned embodiment, comprise the following steps that：
Step a, galvanized steel plain sheet is fixed on the frock clamp of laser cleaning, adjusts the position of laser cleaning machine people,
Setting laser cleaning parameter, it is 0.48m/min that the mean power of first time laser cleaning is 400W, cleaning speed, to the plating
The position to be welded of zinc steel plate carries out first time scanning, go the position to be welded except zinc coat；
Step b, sets laser cleaning parameter, and the mean power of second laser cleaning is 80W, and cleaning speed is 0.48m/
Min, to the position described to be welded of the galvanized steel plain sheet second scanning is carried out, and removes the yellow layer at the position to be welded；
Step c, the position described to be welded for eliminating two pieces of galvanized steel plain sheets of the yellow layer is overlapped, and is adopted
The frock clamp of laser lap is clamped, and sets laser weld parameters, and power is 2kW, positive out of focus 4mm, speed are 1.8m/
min；
Step d, is welded together two pieces of galvanized steel plain sheets at the position to be welded using laser welding.
From the foregoing, it will be observed that the present invention has the advantage that：
In the embodiment of the present invention, removed using laser technology controllable precise on the nearly position while welding of galvanized sheet overlapping regions,
The zinc coat of lower surface, and the steel plate after laser cleaning is welded using laser lap welding method, zinc fume is effectively inhibited to molten
The impact in pond, improves welding quality.
So far, although those skilled in the art will appreciate that detailed herein illustrate and describe multiple showing for the present invention
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (7)
1. a kind of method for laser welding of Progress in Automobile Galvanized Steel Sheets, it is characterised in that include：
Step one, galvanized steel plain sheet is fixed on the frock clamp of laser cleaning, adjusts the position of laser cleaning machine people, is adopted
Mean power is first pulse laser of 300～450W, and to the position to be welded of the galvanized steel plain sheet first time scanning is carried out, and is removed
The zinc coat at the position to be welded；
Step 2, adopt mean power for 80～200W the second pulse laser, the position described to be welded to the galvanized steel plain sheet
Second scanning is carried out, the yellow layer at the position to be welded is removed；
Step 3, the position described to be welded for eliminating two pieces of galvanized steel plain sheets of the yellow layer is overlapped, using sharp
The frock clamp of light overlap joint is clamped；
Step 4：Using laser welding two pieces of galvanized steel plain sheets are welded together at the position to be welded.
2. method for laser welding according to claim 1, it is characterised in that the mean power of first pulse laser is
400W。
3. method for laser welding according to claim 1, it is characterised in that the mean power of second pulse laser is
80W。
4. method for laser welding according to claim 1, it is characterised in that
The pulse width of first pulse laser is 10～100ns, and pulse frequency is 10kHz.
5. method for laser welding according to claim 1, it is characterised in that
The pulse width of second pulse laser is 10～100ns, and pulse frequency is 10kHz.
6. method for laser welding according to claim 1, it is characterised in that the scanning speed of the first time scanning is
0.48m/min；The scanning speed of second scanning is 0.48m/min.
7. method for laser welding according to claim 1, it is characterised in that
The laser power of the laser welding is 2kW, and laser positive out of focus are 4mm, and speed of welding is 1.8m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611112492.9A CN106583925B (en) | 2016-12-07 | 2016-12-07 | A kind of method for laser welding of Progress in Automobile Galvanized Steel Sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611112492.9A CN106583925B (en) | 2016-12-07 | 2016-12-07 | A kind of method for laser welding of Progress in Automobile Galvanized Steel Sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106583925A true CN106583925A (en) | 2017-04-26 |
| CN106583925B CN106583925B (en) | 2018-07-31 |
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| CN201611112492.9A Active CN106583925B (en) | 2016-12-07 | 2016-12-07 | A kind of method for laser welding of Progress in Automobile Galvanized Steel Sheets |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311787A (en) * | 2018-01-18 | 2018-07-24 | 上海业识科技有限公司 | Stainless steel faceplate surface soldered technique based on continuous laser, quasi-continuous lasing |
| CN108581198A (en) * | 2018-04-28 | 2018-09-28 | 大族激光科技产业集团股份有限公司 | Method for laser welding |
| CN109483178A (en) * | 2018-12-29 | 2019-03-19 | 无锡苏嘉法斯特汽车零配件有限公司 | A kind of welding method of zinc-plated high-strength vehicle frame welded tube |
| CN111360400A (en) * | 2020-03-23 | 2020-07-03 | 上海电机学院 | Welding method for automobile aluminum cast radiator |
| CN113210875A (en) * | 2021-05-26 | 2021-08-06 | 中冶南方工程技术有限公司 | Laser welding method and system for color-coated plate |
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| CN203390360U (en) * | 2009-12-23 | 2014-01-15 | 斯克佛姆控股公司 | Component for combined-type scaffold system |
| CN104169039A (en) * | 2012-06-14 | 2014-11-26 | 宝马股份公司 | Method and device for the remoter laser welding of two coated sheets |
| CN105149789A (en) * | 2015-10-28 | 2015-12-16 | 无锡汉神电气有限公司 | Angle joint laser welding technology for 0.5 mm galvanized plate |
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| US4642446A (en) * | 1985-10-03 | 1987-02-10 | General Motors Corporation | Laser welding of galvanized steel |
| JPH04251684A (en) * | 1991-01-24 | 1992-09-08 | Toyota Motor Corp | Laser welding method of galvanized steel sheet |
| GB2274257A (en) * | 1993-01-19 | 1994-07-20 | British Aerospace | Method of preparing and welding zinc coated steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311787A (en) * | 2018-01-18 | 2018-07-24 | 上海业识科技有限公司 | Stainless steel faceplate surface soldered technique based on continuous laser, quasi-continuous lasing |
| CN108581198A (en) * | 2018-04-28 | 2018-09-28 | 大族激光科技产业集团股份有限公司 | Method for laser welding |
| CN109483178A (en) * | 2018-12-29 | 2019-03-19 | 无锡苏嘉法斯特汽车零配件有限公司 | A kind of welding method of zinc-plated high-strength vehicle frame welded tube |
| CN111360400A (en) * | 2020-03-23 | 2020-07-03 | 上海电机学院 | Welding method for automobile aluminum cast radiator |
| CN113210875A (en) * | 2021-05-26 | 2021-08-06 | 中冶南方工程技术有限公司 | Laser welding method and system for color-coated plate |
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| Publication number | Publication date |
|---|---|
| CN106583925B (en) | 2018-07-31 |
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