DE102014200033A1 - Adjustment of the parameters during the welding process at the end of a weld - Google Patents
Adjustment of the parameters during the welding process at the end of a weld Download PDFInfo
- Publication number
- DE102014200033A1 DE102014200033A1 DE102014200033.5A DE102014200033A DE102014200033A1 DE 102014200033 A1 DE102014200033 A1 DE 102014200033A1 DE 102014200033 A DE102014200033 A DE 102014200033A DE 102014200033 A1 DE102014200033 A1 DE 102014200033A1
- Authority
- DE
- Germany
- Prior art keywords
- welding
- weld
- laser
- laser beam
- reduced
- 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.)
- Withdrawn
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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
- B23K26/28—Seam welding of curved planar seams
-
- 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
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
- B23K26/048—Automatically focusing the laser beam by controlling the distance between laser head and workpiece
-
- 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
- B23K26/0626—Energy control of the laser beam
-
- 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
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
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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
Durch die Defokussierung und Verminderung der Geschwindigkeit zwischen Substrat und Schweißstrahl werden Risse am Ende einer Schweißnaht vermieden.By defocusing and reducing the speed between the substrate and the welding beam, cracks at the end of a weld are avoided.
Description
Die Erfindung betrifft ein Schweißverfahren, bei dem zumindest ein Parameter am Ende des Schweißverfahrens angepasst wird. The invention relates to a welding method in which at least one parameter is adapted at the end of the welding process.
Beim Laserstrahlschweißen von Brennerkomponenten, insbesondere mit Kavitäten, wobei ein Deckel auf eine Kavität geschweißt wird, durch die flüssiger oder gasförmiger Brennstoff geführt wird, dürfen durch den Schweißprozess keine Wurzeldurchhänge nach dem Schweißen verbleiben. An diesen Wurzeldurchhängen könnten durch den Brennstoff Korrosionsvorgänge ausgelöst werden, die zum Versagen der Brennerkomponente führen könnten. Speziell beim Ausschalten der Laserstrahlung darf sich kein kritischer Wurzeldurchhang bilden. In the laser beam welding of burner components, in particular with cavities, wherein a lid is welded to a cavity through which liquid or gaseous fuel is passed, no root sags may remain after welding due to the welding process. At these root passages corrosion could be triggered by the fuel, which could lead to the failure of the burner component. Especially when switching off the laser radiation, no critical root sag must be allowed.
Es ist daher Aufgabe der Erfindung ein Verfahren aufzuzeigen, mit dem oben genannte Probleme gelöst werden. It is therefore an object of the invention to provide a method with which the above-mentioned problems are solved.
Die Aufgabe wird gelöst durch ein Verfahren gemäß Anspruch 1. The object is achieved by a method according to claim 1.
Um diesen Wurzeldurchhang zu vermeiden wurde eine Strategie entwickelt, den Laserschweißprozess vom Tiefschweißen in den Wärmeleitungsschweißprozess zu überführen. In order to avoid this sagging, a strategy has been developed to transform the laser welding process from deep penetration welding into the thermal conduction welding process.
Dies geschieht durch Defokussierung der Schweißstrahlung oder Laserstrahlung insbesondere bei konstanter Laserleistung. Dadurch wird die Intensitätsverteilung der Laserstrahlung an der Werkstückoberfläche so verkleinert, dass ein Übergang vom Tiefschweißen in das Wärmeleitungsschweißen stattfindet. This is done by defocusing the welding radiation or laser radiation, in particular at a constant laser power. As a result, the intensity distribution of the laser radiation at the workpiece surface is reduced so that a transition from deep welding to heat conduction welding takes place.
In den Unteransprüchen sind weitere vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden können, um weitere Vorteile zu erzielen. In the dependent claims further advantageous measures are listed, which can be combined with each other in order to achieve further advantages.
Der Vorteil des Verfahrens liegt in der Vermeidung von Durchhängen und bietet die Möglichkeit, Kavitäten insbesondere mit einem Deckel miteinander zu verschweißen. The advantage of the method lies in the avoidance of sagging and offers the possibility of welding cavities together, in particular with a cover.
Die Figur zeigt schematisch eine Anordnung. The figure shows schematically an arrangement.
Die Figur und die Beschreibung stellen nur Ausführungsbeispiele der Erfindung dar. The figure and the description represent only embodiments of the invention.
Vorgeschlagen wird das Schweißen mit veränderten Parametern am Ende des Verfahrens, insbesondere beim Laserstrahlschweißen von zwei Komponenten oder Subtraten
Ein ggf. vorhandener Hohlraum wird vorzugsweise mit einem Keramikpulver und vorzugsweise auch einem Formiergas (Formiergas Ar + 18% CO2) gefüllt. Dadurch wird während des Schweißens ein Durchhang der Schweißnaht verhindert. Durch das Keramikpulver wird zusätzlich die durchstrahlende Laserstrahlung absorbiert und damit wird eine Rückwand des Hohlraums geschützt. A possibly existing cavity is preferably filled with a ceramic powder and preferably also a forming gas (forming gas Ar + 18% CO 2 ). As a result, a sag of the weld is prevented during welding. The ceramic powder additionally absorbs the transmitted laser radiation and thus protects a back wall of the cavity.
Die Figur zeigt ein Bauteil
Bevorzugt wird ein Laserstrahlschweißen verwendet, jedoch kann jeder andere Plasmastrahl oder Schweißstrahl verwendet werden. Preferably, laser beam welding is used, however, any other plasma jet or welding beam may be used.
Vor dem Ende des Schweißverfahrens an dem Punkt
Als Scangeschwindigkeit ist die relative Geschwindigkeit zwischen Schweißstrahl
Für das Ausschalten der Laserstrahlung
Für den Schweißprozess bedeutet das, dass der Übergang Tiefschweißen/Wärmeleitungsschweißen mit Hilfe einer angepassten, Energieführung, insbesondere verkleinerten Leistungsdichte des Laserstrahls von vorzugsweise 3,6·106W/cm2 auf 0,3·106W/cm2 homogener bzw. moderater überführt wird. Dabei werden kleinere Wärmegradienten erzeugt, was die Ausbildung einer endkraterfreien Nahtwurzel am Ende der Schweißnaht begünstigt. For the welding process this means that the transition deep welding / heat conduction welding with the help of an adapted, energy management, in particular reduced power density of the laser beam of preferably 3.6 · 10 6 W / cm 2 to 0.3 · 10 6 W / cm 2 homogeneous or moderate is transferred. In this case, smaller heat gradients are generated, which favors the formation of a close-crater-free seam root at the end of the weld.
Für den Schweißprozess bedeutet das, dass der Übergang Tiefschweißen/Wärmeleitungsschweißen mit Hilfe einer angepassten, insbesondere verkleinerten Geschwindigkeit von vorzugsweise v = 2000mm/min auf v = 500mm/min homogener bzw. moderater überführt wird, weil kleinere Wärmegradienten erzeugt werden. For the welding process this means that the transition deep welding / heat conduction welding using a matched, especially reduced speed of preferably v = 2000mm / min is transferred to v = 500mm / min more homogeneous or moderate, because smaller heat gradients are generated.
Claims (11)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014200033.5A DE102014200033A1 (en) | 2014-01-07 | 2014-01-07 | Adjustment of the parameters during the welding process at the end of a weld |
PCT/EP2014/076733 WO2015104107A1 (en) | 2014-01-07 | 2014-12-05 | Adaptation of welding process parameters at the end of a weld seam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014200033.5A DE102014200033A1 (en) | 2014-01-07 | 2014-01-07 | Adjustment of the parameters during the welding process at the end of a weld |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102014200033A1 true DE102014200033A1 (en) | 2015-07-09 |
Family
ID=52144640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102014200033.5A Withdrawn DE102014200033A1 (en) | 2014-01-07 | 2014-01-07 | Adjustment of the parameters during the welding process at the end of a weld |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102014200033A1 (en) |
WO (1) | WO2015104107A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10229744A1 (en) * | 2002-07-03 | 2004-01-15 | Winter Pipeline Gmbh | Procedure for error-free laser welding in the start / stop area |
DE10349677A1 (en) * | 2003-02-28 | 2004-09-30 | Daimlerchrysler Ag | Laser beam welding method for seam end, involves distancing focus of laser beam from surface to be welded towards seam end |
EP1518633A1 (en) * | 2003-09-26 | 2005-03-30 | Erlas Erlanger Lasertechnik GmbH | Welding process, assembled bodies and use of a laser to manufacture the assembled body |
DE10342101A1 (en) * | 2003-09-10 | 2005-04-07 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Thermal welding, especially laser welding method for workpieces, especially motor vehicle components, has power density introduced into weld seam varied to give reduced seam thickness towards one end |
US20080223831A1 (en) * | 2005-09-30 | 2008-09-18 | Nissan Motor Co., Ltd. | Laser Welding Method and Laser Welding System |
DE102008033208A1 (en) * | 2007-07-30 | 2009-02-05 | Honda Motor Co., Ltd. | Perforating method and perforating device |
EP2143519A1 (en) * | 2007-04-16 | 2010-01-13 | Toyota Jidosha Kabushiki Kaisha | Method for laser-welding overlapped works |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004001166B4 (en) * | 2003-02-28 | 2007-03-15 | Daimlerchrysler Ag | Method for laser welding with preheating and / or reheating in the region of the weld |
FI119593B (en) * | 2006-01-19 | 2009-01-15 | Savcor Alfa Oy | Laser welding procedure |
US20070175872A1 (en) * | 2006-01-27 | 2007-08-02 | Rhoades Lawrence J | Laser back wall protection by particulate shading |
JP2012170989A (en) * | 2011-02-22 | 2012-09-10 | Suzuki Motor Corp | Laser lap welding method |
-
2014
- 2014-01-07 DE DE102014200033.5A patent/DE102014200033A1/en not_active Withdrawn
- 2014-12-05 WO PCT/EP2014/076733 patent/WO2015104107A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10229744A1 (en) * | 2002-07-03 | 2004-01-15 | Winter Pipeline Gmbh | Procedure for error-free laser welding in the start / stop area |
DE10349677A1 (en) * | 2003-02-28 | 2004-09-30 | Daimlerchrysler Ag | Laser beam welding method for seam end, involves distancing focus of laser beam from surface to be welded towards seam end |
DE10342101A1 (en) * | 2003-09-10 | 2005-04-07 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Thermal welding, especially laser welding method for workpieces, especially motor vehicle components, has power density introduced into weld seam varied to give reduced seam thickness towards one end |
EP1518633A1 (en) * | 2003-09-26 | 2005-03-30 | Erlas Erlanger Lasertechnik GmbH | Welding process, assembled bodies and use of a laser to manufacture the assembled body |
US20080223831A1 (en) * | 2005-09-30 | 2008-09-18 | Nissan Motor Co., Ltd. | Laser Welding Method and Laser Welding System |
EP2143519A1 (en) * | 2007-04-16 | 2010-01-13 | Toyota Jidosha Kabushiki Kaisha | Method for laser-welding overlapped works |
DE102008033208A1 (en) * | 2007-07-30 | 2009-02-05 | Honda Motor Co., Ltd. | Perforating method and perforating device |
Also Published As
Publication number | Publication date |
---|---|
WO2015104107A1 (en) | 2015-07-16 |
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R163 | Identified publications notified | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |