WO1999008829A1 - Method of laser beam welding of zinc-coated steel sheet - Google Patents

Method of laser beam welding of zinc-coated steel sheet Download PDF

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Publication number
WO1999008829A1
WO1999008829A1 PCT/CA1998/000779 CA9800779W WO9908829A1 WO 1999008829 A1 WO1999008829 A1 WO 1999008829A1 CA 9800779 W CA9800779 W CA 9800779W WO 9908829 A1 WO9908829 A1 WO 9908829A1
Authority
WO
WIPO (PCT)
Prior art keywords
components
welding
protuberances
laser beam
laser
Prior art date
Application number
PCT/CA1998/000779
Other languages
French (fr)
Other versions
WO1999008829A9 (en
Inventor
Hongping Gu
Original Assignee
Powerlasers Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Powerlasers Ltd. filed Critical Powerlasers Ltd.
Priority to BR9811906-0A priority Critical patent/BR9811906A/en
Priority to EP98940005A priority patent/EP1003624A1/en
Priority to AU88474/98A priority patent/AU8847498A/en
Publication of WO1999008829A1 publication Critical patent/WO1999008829A1/en
Publication of WO1999008829A9 publication Critical patent/WO1999008829A9/en

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
    • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004—Filling of continuous seams
    • B23K33/008—Filling of continuous seams for automotive applications
    • 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
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • 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
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
    • 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
    • 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
    • B23K2103/08—Non-ferrous metals or alloys
    • 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
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26

Definitions

  • the present invention relates to a method of making lap joint of zinc coated steel sheets with a laser beam.
  • the present invention is intended to provide a practical and flexible way of making laser beam lap weld of zinc coated steel sheets.
  • a laser beam interaction with one surface of the material is used to create an acceptable gap between the sheets before the welding pass is performed.
  • protuberances are formed on one surface of one sheet by impingement of a laser beam which maintains opposed surfaces of the sheets in spaced relationship.
  • the welding may be completed entirely on a single welding apparatus in an efficient cost-effective manner.
  • this technique it is possible to make a curved welding pass and it is applicable to 3D welding configuration. Therefore, this technique makes the production of laser beam lap welds of the zinc coated steel sheets possible using an existing butt welding system.
  • the preferred embodiment of the invention relates to a method of creating a gap for vapor gas venting by the laser beam before welding is performed.
  • the principle is that a laser beam pulse with an appropriate pulse length can melt a spot on the metal sheet when it interacts with the metal and solidification of the molten metal forms a protuberance.
  • the protuberance height above the sheet surface may be a few tenths millimeters.
  • a series of protuberances in a line or curve serves as a spacer.
  • the appropriate distance between two laser created protuberances depends upon the clamping force, laser beam power, scanning speed and the thickness of the metal sheets.
  • the sheet on which laser pulses generate protuberances can be either the top one or the bottom one. For both configurations, good quality welds can be produced.
  • Figure 1 is a plan view of a pair of lap welded components
  • Figure 2 is a view on the line 2-2 of the sequential steps in performing a weld on the components
  • Figure 3 is an alternative embodiment showing the production of a spot weld
  • Figure 4 is a photographic representation of a portion of one of the sheets shown in Figure 2;
  • Figure 5a is a photographic representation of a section on the weld shown in Figure 1;
  • Figure 5b is a photographic representation of a plan view of the weld shown in Figure l.
  • Figure 6 is photographic representations of welded components produced by the technique shown in Figure 2.
  • a pair of components 10, 12 are connected by seam welding along a seam line 13 indicated in chain dot line.
  • Each of the components is a steel sheet having oppositely directed surfaces 16, 17 and 18, 20 respectively.
  • Each of the surfaces has a rust inhibiting coating, typically a zinc coating 22 to provide protection from corrosion.
  • one of the components to be welded namely zinc-coated steel sheet 10 is placed on a welding table (any kind of table used for laser welding).
  • a series of laser beam pulses 14 transmitted through laser head 23 are used to impinge on one of the surfaces 16 of the sheet 10 to create a series of protuberances 15 along the intended weld line 13. This process can be done by moving laser beam 14 over the sheet 10 or by manipulating the focusing optics of the laser head.
  • the zinc-coated steel sheet 12 is placed on top of the laser-pulsed sheet 10 so that surface 18 overlies the surface 16.
  • the laser-pulsed steel sheet 10 may be placed on top of the other zinc-coated steel sheet 12. Under either condition, the steel sheets 10, 12 are pressed together by a clamp (not shown). As a result, two sheets to be welded are held together and are ready to be welded.
  • the protuberances 15 form an air gap 24 between the opposed surfaces 16, 18 of overlapping portions of the zinc-coated steel sheets 10, 12 along the weld line 13.
  • the welding operation is carried out by applying laser beam 14 to the steel sheets 10, 12 as indicated in Figure 2 by arrow A.
  • the zinc vapor 26 of the zinc- coating 22 can flow into the air gap 24 surrounding the welding keyhole. Therefore, no air holes or very few air holes are formed in the solidified metal weld 19. Thus, the resultant weld is satisfactory in quality.
  • the protuberances 15 were formed by beam pulses of 100 - 150 millisec in duration.
  • the thickness of the sheet 10 was ⁇ 1.0 mm and the material galvanneal steel.
  • the height of the protuberances 15 was in the order of 0.4 mm with a diameter of in the order of 2 mm.
  • the protuberance is irregular but of sufficient height to maintain the surfaces 16, 18 separated.
  • the spacing of the protuberances was about 50 mm for the material selected although this spacing may vary according to the material.
  • the components 10, 12 were seam welded using the 1.5 kW laser in continuous mode traveling at a welding speed of 1.5 in/sec. The resultant weld is shown in Figure 5 where it can be seen that good homogeneity has been obtained.
  • one of the components 10 to be welded is placed on a working table or frame.
  • a laser beam pulse 14 impinges on surface 16 to create a protuberance 15.
  • zinc-coated steel sheet 12 is placed on top and clamped.
  • an air gap is formed between two zinc-coated steel sheets around the laser- generated humps.
  • the welding operation is carried out by applying a laser beam 14 to the steel sheets adjacent to each protuberance 15.
  • the laser beam draws a circle of small radius around the protuberance to provide a localized circular weld. Welding will not affected if the path of the beam intercepts the protuberance.
  • the zinc vapor 26 escapes into the air gap around the hump. Therefore, a circular weld 19 is made and the resultant weld is satisfactory in quality. This circular weld can be considered as a spot weld.

Abstract

A pair of coated components are laser welded to one another by initially forming protuberances on one of the components. The protuberances maintain juxtaposed surfaces separated and the components are then laser welded to one another. The separation of the surfaces vents vapor generated by the coating.

Description

METHOD OF LASER BEAM WELDING OF ZINC-COATED STEEL SHEET
The present invention relates to a method of making lap joint of zinc coated steel sheets with a laser beam.
BACKGROUND OF THE INVENTION
The increased use of zinc-rich coated steel sheets in auto-body components for enhanced corrosion resistance poses a demand for an acceptable welding method to join these kinds of sheets. Laser beam welding has an advantage of low total heat input and thus causes a low distortion to the zinc-rich coating on the sheet. Therefore laser beam welding is being evaluated as a desirable joining technique for such sheet steel in butt and lap joint configurations. However, a problem arises with welding these materials in the lap-joint configuration due to the low boiling point of zinc (906°C) compared with the melting temperature of steel (~1550°C).
If there is no joint clearance between the sheets the zinc vapor during welding can only escape through the molten welding pool, and this typically results in excessive weld porosity or complete expulsion of the weld metal. In order to make a good quality weld, there are, in principle, two solutions to get around this problem: (1) creating a zinc-vapor venting channel during welding; or (2) removing the zinc coating in the welding pass. Both of these approaches need additional techniques to be realized. Many techniques have been developed to provide a gap between sheets to perform laser welding and to remove the zinc coat at the welding spot. These approaches typically require the use of supplementary components or spacers and cannot be employed in the production line, since additional equipment is required to create a gap or remove the coating. This will incur a significant expense and increase production time. It is therefore an object of the present invention to obviate or mitigate the above disadvantages.
SUMMARY OF THE INVENTION
The present invention is intended to provide a practical and flexible way of making laser beam lap weld of zinc coated steel sheets. In general terms, a laser beam interaction with one surface of the material is used to create an acceptable gap between the sheets before the welding pass is performed.
More specifically, protuberances are formed on one surface of one sheet by impingement of a laser beam which maintains opposed surfaces of the sheets in spaced relationship. In this manner, the welding may be completed entirely on a single welding apparatus in an efficient cost-effective manner. With such a technique, it is possible to make a curved welding pass and it is applicable to 3D welding configuration. Therefore, this technique makes the production of laser beam lap welds of the zinc coated steel sheets possible using an existing butt welding system.
The preferred embodiment of the invention relates to a method of creating a gap for vapor gas venting by the laser beam before welding is performed. The principle is that a laser beam pulse with an appropriate pulse length can melt a spot on the metal sheet when it interacts with the metal and solidification of the molten metal forms a protuberance. The protuberance height above the sheet surface may be a few tenths millimeters. A series of protuberances in a line or curve serves as a spacer. When the laser pulse pre-processed sheet is put together with another sheet, a gap is formed. Laser welding can thus be performed along the spotted line/curve and go over the protuberances. The appropriate distance between two laser created protuberances depends upon the clamping force, laser beam power, scanning speed and the thickness of the metal sheets. In lap welding, the sheet on which laser pulses generate protuberances can be either the top one or the bottom one. For both configurations, good quality welds can be produced.
DESCRIPTION OF THE INVENTION
Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings, in which
Figure 1 is a plan view of a pair of lap welded components;
Figure 2 is a view on the line 2-2 of the sequential steps in performing a weld on the components;
Figure 3 is an alternative embodiment showing the production of a spot weld;
Figure 4 is a photographic representation of a portion of one of the sheets shown in Figure 2;
Figure 5a is a photographic representation of a section on the weld shown in Figure 1;
Figure 5b is a photographic representation of a plan view of the weld shown in Figure l; and
Figure 6 is photographic representations of welded components produced by the technique shown in Figure 2.
Referring therefore to Figure 1, a pair of components 10, 12 are connected by seam welding along a seam line 13 indicated in chain dot line. Each of the components is a steel sheet having oppositely directed surfaces 16, 17 and 18, 20 respectively. Each of the surfaces has a rust inhibiting coating, typically a zinc coating 22 to provide protection from corrosion. As shown in Figure 2, one of the components to be welded, namely zinc-coated steel sheet 10 is placed on a welding table (any kind of table used for laser welding). A series of laser beam pulses 14 transmitted through laser head 23 are used to impinge on one of the surfaces 16 of the sheet 10 to create a series of protuberances 15 along the intended weld line 13. This process can be done by moving laser beam 14 over the sheet 10 or by manipulating the focusing optics of the laser head.
Once the pulsed protuberances are formed, the zinc-coated steel sheet 12 is placed on top of the laser-pulsed sheet 10 so that surface 18 overlies the surface 16. Alternatively, of course, the laser-pulsed steel sheet 10 may be placed on top of the other zinc-coated steel sheet 12. Under either condition, the steel sheets 10, 12 are pressed together by a clamp (not shown). As a result, two sheets to be welded are held together and are ready to be welded.
The protuberances 15 form an air gap 24 between the opposed surfaces 16, 18 of overlapping portions of the zinc-coated steel sheets 10, 12 along the weld line 13.
The welding operation is carried out by applying laser beam 14 to the steel sheets 10, 12 as indicated in Figure 2 by arrow A. During the welding, the zinc vapor 26 of the zinc- coating 22 can flow into the air gap 24 surrounding the welding keyhole. Therefore, no air holes or very few air holes are formed in the solidified metal weld 19. Thus, the resultant weld is satisfactory in quality.
In a typical welding operation using a 1.5 kW CO2 laser, the protuberances 15 were formed by beam pulses of 100 - 150 millisec in duration. The thickness of the sheet 10 was ~1.0 mm and the material galvanneal steel. The height of the protuberances 15 was in the order of 0.4 mm with a diameter of in the order of 2 mm. As can be seen from Figure 4, the protuberance is irregular but of sufficient height to maintain the surfaces 16, 18 separated. The spacing of the protuberances was about 50 mm for the material selected although this spacing may vary according to the material. The components 10, 12 were seam welded using the 1.5 kW laser in continuous mode traveling at a welding speed of 1.5 in/sec. The resultant weld is shown in Figure 5 where it can be seen that good homogeneity has been obtained.
The above embodiment has been described with respect to seam welding but a similar technique may be used for spot welding.
As shown in Figure 3, one of the components 10 to be welded is placed on a working table or frame. At the locations where laser spot welds are to be made, a laser beam pulse 14 impinges on surface 16 to create a protuberance 15. After all the locations are pulsed by laser beam 14, zinc-coated steel sheet 12 is placed on top and clamped. As a result of this configuration, an air gap is formed between two zinc-coated steel sheets around the laser- generated humps. The welding operation is carried out by applying a laser beam 14 to the steel sheets adjacent to each protuberance 15. The laser beam draws a circle of small radius around the protuberance to provide a localized circular weld. Welding will not affected if the path of the beam intercepts the protuberance.
As described in the seam welding embodiment above, the zinc vapor 26 escapes into the air gap around the hump. Therefore, a circular weld 19 is made and the resultant weld is satisfactory in quality. This circular weld can be considered as a spot weld.
It will be seen from the above description that the creation of natural spacer by this technique is simple and flexible as the laser beam can be put on anywhere on the sheet to create protuberances and to perform welding. Moreover, implementation of lap welding can be done with present laser welding systems with little additional costs.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of laser welding a pair of juxtaposed components comprising the steps of forming on one surface of one component a protuberance to project above said surface, juxtaposing said components such that opposed surfaces are maintained separated by said protuberance, and laser welding said components by impingement of a laser beam in the region in which said surfaces are separated.
2. A method according to claim 1 wherein said protuberance is formed by impingement by laser beam.
3. A method according to claim 1 wherein said weld is formed by rotating said beam about one of said protuberance.
4. A method according to any preceding claim 1 in which a plurality to protuberances are formed in spaced relationship along a surface of said one component.
5. A method according to claim 4 wherein said components are welded to one another by translating said laser beam along said surface in the direction of said protuberances.
6. A method according to claim 4 wherein said components are welded to one another by rotation of said beam about respective ones of said protuberances to provide a generally circular weld.
7. A method according to any preceding claim wherein at least one of said components is coated with a rust inhibiting coating.
8. A method according to claim 7 wherein said coating includes zinc.
9. A method of welding a pair of sheet metal components having a corrosive resistant coating to one another comprising the steps of impinging a laser beam upon one surface of one of the components to form a plurality of localized protuberances thereon at spaced intervals, juxtaposing said sheets with said protuberances interposed between said sheets to maintain a separation thereof, and welding said sheets to one another by impingement of said beam in the vicinity of said protuberances.
10. A method according to claim 9 wherein said welding is performed by translating said beam across said components.
11. A method according to claim 10 wherein said beam is rotated about said protuberances to provide a circular weld.
12. A method according to claim 9 wherein said beam intersects said protuberances during welding.
PCT/CA1998/000779 1997-08-15 1998-08-14 Method of laser beam welding of zinc-coated steel sheet WO1999008829A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR9811906-0A BR9811906A (en) 1997-08-15 1998-08-14 Laser welding process of a pair of components
EP98940005A EP1003624A1 (en) 1997-08-15 1998-08-14 Method of laser beam welding of zinc-coated steel sheet
AU88474/98A AU8847498A (en) 1997-08-15 1998-08-14 Method of laser beam welding of zinc-coated steel sheet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,209,804 1997-08-15
CA 2209804 CA2209804A1 (en) 1997-08-15 1997-08-15 Method of laser beam welding of zinc-coated steel sheet

Publications (2)

Publication Number Publication Date
WO1999008829A1 true WO1999008829A1 (en) 1999-02-25
WO1999008829A9 WO1999008829A9 (en) 2000-04-13

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EP (1) EP1003624A1 (en)
AU (1) AU8847498A (en)
BR (1) BR9811906A (en)
CA (1) CA2209804A1 (en)
WO (1) WO1999008829A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004024385A1 (en) * 2002-09-05 2004-03-25 Daimlerchrysler Ag Method for the laser machining of coated sheets
US6797915B2 (en) * 2001-04-05 2004-09-28 Nothelfer Gmbh Method and device for joining coated metal sheets by means of laser welding
DE10331745A1 (en) * 2003-07-11 2005-02-24 Volkswagen Ag Laser welding connection used in vehicle construction comprises sheet metal parts in which the middle part has a recess having a convex region or concave region lying at a distance from each other
WO2005075141A1 (en) * 2004-02-03 2005-08-18 Daimlerchrysler Ag Method for modifying the topography of coated sheet metal using a laser beam and coated sheet metal with a topographical modification of this type
DE102004025931B3 (en) * 2004-05-27 2005-11-03 Daimlerchrysler Ag Assembly of interconnected conductive components, which carry KTL corrosion protection and process for their preparation
EP1674191A2 (en) * 2004-12-22 2006-06-28 Schlegel Ag Two sheet-metal component manufacturing method and two sheet-metal component therefor.
FR2915912A1 (en) * 2007-05-11 2008-11-14 Peugeot Citroen Automobiles Sa METHOD FOR LASER WELDING OF METALLIC ELEMENTS
WO2012000106A1 (en) * 2010-07-01 2012-01-05 Magna International Inc. Laser-based lap welding of sheet metal components using laser induced protuberances to control gap
WO2015129231A1 (en) * 2014-02-25 2015-09-03 パナソニックＩｐマネジメント株式会社 Laser welding method
CN104994988A (en) * 2013-02-15 2015-10-21 日产自动车株式会社 Laser welding method, laser welding device, and welded member
CN106041308A (en) * 2016-08-18 2016-10-26 安徽巨自动化装备有限公司 Method for controlling gaps of laser fusion weld plates of aluminum alloy vehicle bodies
CN108349045A (en) * 2015-11-17 2018-07-31 日产自动车株式会社 Method for laser welding and laser soldering device
EP3584031A1 (en) 2018-06-20 2019-12-25 Sund Birsta AB Strapping machine for and method of securing a piece of coated metal strap in a loop around one or more objects
WO2020112728A1 (en) * 2018-11-27 2020-06-04 Shape Corp. Galvanized multi-tubular beam and method of continuously forming the same

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Publication number Priority date Publication date Assignee Title
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60255294A (en) * 1984-05-31 1985-12-16 Kubota Ltd Laser beam welding method
DE3812448C1 (en) * 1988-04-14 1989-06-15 Bayerische Motoren Werke Ag, 8000 Muenchen, De
US5104032A (en) * 1989-10-06 1992-04-14 Mercedes-Benz Ag Welded lap or web joint for galvanized sheets
US5389761A (en) * 1993-09-17 1995-02-14 General Motors Corporation Method and apparatus for cleaning metal pieces prior to resistive seam welding or laser lap seam welding
US5454480A (en) * 1993-10-21 1995-10-03 Morris Holmes & Co. Flangeless fuel tank
FR2731373A1 (en) * 1995-03-09 1996-09-13 Peugeot Method for welding plates by laser beam for motor vehicle mfr.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60255294A (en) * 1984-05-31 1985-12-16 Kubota Ltd Laser beam welding method
DE3812448C1 (en) * 1988-04-14 1989-06-15 Bayerische Motoren Werke Ag, 8000 Muenchen, De
US5104032A (en) * 1989-10-06 1992-04-14 Mercedes-Benz Ag Welded lap or web joint for galvanized sheets
US5389761A (en) * 1993-09-17 1995-02-14 General Motors Corporation Method and apparatus for cleaning metal pieces prior to resistive seam welding or laser lap seam welding
US5454480A (en) * 1993-10-21 1995-10-03 Morris Holmes & Co. Flangeless fuel tank
US5626776A (en) * 1993-10-21 1997-05-06 Morris Holmes & Co. Flangeless fuel tank
FR2731373A1 (en) * 1995-03-09 1996-09-13 Peugeot Method for welding plates by laser beam for motor vehicle mfr.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 130 (M - 478) 14 May 1986 (1986-05-14) *

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6797915B2 (en) * 2001-04-05 2004-09-28 Nothelfer Gmbh Method and device for joining coated metal sheets by means of laser welding
WO2004024385A1 (en) * 2002-09-05 2004-03-25 Daimlerchrysler Ag Method for the laser machining of coated sheets
US7939779B2 (en) 2002-09-05 2011-05-10 Daimler Ag Method for the laser machining of coated sheets
DE10331745A1 (en) * 2003-07-11 2005-02-24 Volkswagen Ag Laser welding connection used in vehicle construction comprises sheet metal parts in which the middle part has a recess having a convex region or concave region lying at a distance from each other
DE10331745B4 (en) * 2003-07-11 2012-06-28 Volkswagen Ag Laser welding connection and method for producing a laser welding connection
DE102004005358B4 (en) * 2004-02-03 2007-03-22 Daimlerchrysler Ag Process for the laser processing of coated sheets and coated sheet metal
US7939781B2 (en) 2004-02-03 2011-05-10 Daimler Ag Method for modifying the topography of coated sheet metal using a laser beam and coated sheet metal with a topographical modification of this type
WO2005075141A1 (en) * 2004-02-03 2005-08-18 Daimlerchrysler Ag Method for modifying the topography of coated sheet metal using a laser beam and coated sheet metal with a topographical modification of this type
DE102004005358A1 (en) * 2004-02-03 2005-09-08 Daimlerchrysler Ag Process for the laser processing of coated sheets and coated sheet metal
US7144492B2 (en) 2004-05-27 2006-12-05 Daimlerchrysler Ag Assembly comprised of joined conductive components having cataphoretic paint layer and process for manufacture thereof
DE102004025931B3 (en) * 2004-05-27 2005-11-03 Daimlerchrysler Ag Assembly of interconnected conductive components, which carry KTL corrosion protection and process for their preparation
EP1674191A3 (en) * 2004-12-22 2007-05-30 Schlegel Ag Two sheet-metal component manufacturing method and two sheet-metal component therefor.
EP1674191A2 (en) * 2004-12-22 2006-06-28 Schlegel Ag Two sheet-metal component manufacturing method and two sheet-metal component therefor.
WO2008149008A3 (en) * 2007-05-11 2009-02-19 Peugeot Citroen Automobiles Sa Laser welding process for welding metal components, producing a plurality of projections by means of a laser at the interface between the components
WO2008149008A2 (en) * 2007-05-11 2008-12-11 Peugeot Citroen Automobiles Sa Laser welding process for welding metal components, producing a plurality of projections by means of a laser at the interface between the components
FR2915912A1 (en) * 2007-05-11 2008-11-14 Peugeot Citroen Automobiles Sa METHOD FOR LASER WELDING OF METALLIC ELEMENTS
US9737960B2 (en) 2010-07-01 2017-08-22 Magna International Inc. Laser-based lap welding of sheet metal components using laser induced protuberances to control gap
WO2012000106A1 (en) * 2010-07-01 2012-01-05 Magna International Inc. Laser-based lap welding of sheet metal components using laser induced protuberances to control gap
CN102958641A (en) * 2010-07-01 2013-03-06 麦格纳国际公司 Laser-based lap welding of sheet metal components using laser induced protuberances to control gap
CN104994988A (en) * 2013-02-15 2015-10-21 日产自动车株式会社 Laser welding method, laser welding device, and welded member
US11203086B2 (en) 2013-02-15 2021-12-21 Nissan Motor Co., Ltd. Laser welding method and laser welding device
WO2015129231A1 (en) * 2014-02-25 2015-09-03 パナソニックＩｐマネジメント株式会社 Laser welding method
US10286491B2 (en) 2014-02-25 2019-05-14 Panasonic Intellectual Property Management Co., Ltd. Laser welding method
CN108349045A (en) * 2015-11-17 2018-07-31 日产自动车株式会社 Method for laser welding and laser soldering device
US10421153B2 (en) 2015-11-17 2019-09-24 Nissan Motor Co., Ltd. Laser welding method and laser welding device
CN106041308A (en) * 2016-08-18 2016-10-26 安徽巨自动化装备有限公司 Method for controlling gaps of laser fusion weld plates of aluminum alloy vehicle bodies
EP3584031A1 (en) 2018-06-20 2019-12-25 Sund Birsta AB Strapping machine for and method of securing a piece of coated metal strap in a loop around one or more objects
WO2020112728A1 (en) * 2018-11-27 2020-06-04 Shape Corp. Galvanized multi-tubular beam and method of continuously forming the same
CN113329826A (en) * 2018-11-27 2021-08-31 形状集团 Galvanized multi-tube beam and continuous forming method thereof
US11427144B2 (en) 2018-11-27 2022-08-30 Shape Corp. Galvanized multi-tubular beam and method of continuously forming the same
US11660652B2 (en) 2018-11-27 2023-05-30 Shape Corp. Multi-tubular beam for a vehicle
CN113329826B (en) * 2018-11-27 2023-12-05 形状集团 Galvanized multi-tube beam and continuous forming method thereof

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EP1003624A1 (en) 2000-05-31
WO1999008829A9 (en) 2000-04-13
AU8847498A (en) 1999-03-08
CA2209804A1 (en) 1999-02-15
BR9811906A (en) 2000-08-15

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