WO2008077364A1 - Method and device for welding sheet metal having a preheat and/or reheating device - Google Patents

Method and device for welding sheet metal having a preheat and/or reheating device Download PDF

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Publication number
WO2008077364A1
WO2008077364A1 PCT/DE2007/002131 DE2007002131W WO2008077364A1 WO 2008077364 A1 WO2008077364 A1 WO 2008077364A1 DE 2007002131 W DE2007002131 W DE 2007002131W WO 2008077364 A1 WO2008077364 A1 WO 2008077364A1
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WO
WIPO (PCT)
Prior art keywords
welding
carriage
nachwärmquelle
reheating
laser
Prior art date
Application number
PCT/DE2007/002131
Other languages
German (de)
French (fr)
Inventor
Lutz Kümmel
Michael Tomzig
Original Assignee
Sms Siemag Ag
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 Sms Siemag Ag filed Critical Sms Siemag Ag
Publication of WO2008077364A1 publication Critical patent/WO2008077364A1/en

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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
    • 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
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • 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
    • B23K26/60—Preliminary treatment
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
    • 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

Definitions

  • the invention relates to a method for welding sheets with a pre- and / or reheating in the region of the weld, and a device for this purpose.
  • thin strips are welded at higher welding speeds than thick strips, although the welding speed can vary additionally with the same thickness (for example, depending on steel quality).
  • This heat treatment can be done in two different ways, and that is done with the same laser used for the welding.
  • the laser can be driven with substantially the same performance as when welding, the same focus but increased feed speed.
  • the laser can be driven with substantially the same power, increased focus and possibly reduced feed.
  • the aim of preheating is to avoid cracking immediately after the welding process and increase the energy content of the seam area to reduce the cooling rate for better adjustment of the material properties immediately after welding.
  • the reheating serves to further reduce the cooling rate and / or holding the temperature for the purpose of heat treatment of the weld and their environment. It can also be done with a reheat.
  • the object of the invention is to improve the flexibility of the heat treatment.
  • This object is achieved according to the invention in a method for welding sheets with a preheating and / or reheating in the weld, characterized in that the starting time for the beginning of the reheating relative to the completion of the welding process regardless of the speed of feed of the welding device adjustable is.
  • the Nachürmlude be tracked to the laser, the distance between the welding device and the Nachürmario is adjustable.
  • the welding device is arranged on a carriage, which is movable parallel to the welding seam to be laid and the preheating and the Nachisserm provoke are also arranged on carriages whose direction of movement corresponds to that of the welding machine.
  • the preheating and the Nachracermario can be arranged on separate carriages.
  • a common trolley may be provided, but the Nachracermario is additionally slidably mounted relative to the carriage.
  • the carriages can - are arranged above the weld to be laid according to a further embodiment or alternatively, the carriage for the preheating source above and the carriage for the Nachissermán be moved below the sheet to be welded.
  • the carriages are independently drivable.
  • the term of the trolley used here stands for a mobile device, on which the device for welding and the heat sources are arranged, so that they are locally variable.
  • pre- and / or reheating line inductors or comparable heat sources can be provided.
  • a laser is used according to the invention as a welding device.
  • Figures 1-3 schematically different embodiments for the carriage and Figure 4 is a cooling curve
  • the direction of welding lies in the plane of the paper, running from right to left.
  • a carriage 6 carries the laser and the preheating source 4.
  • the Nachracermario 5 is arranged on a separate carriage 7. Since the carriages 6 and 7 are driven separately, the movement or displacement of the rear carriage 7 can be carried out independently of the front carriage 6. This can then be done - A -
  • Start of reheating is independent of the termination of the welding process is adjustable.
  • the two carriages 6 and 7 can be moved on a rail system or a corresponding track 8.
  • the vehicles are only synonymous with a
  • FIG. 2 shows, in a modification of FIG. 1, only that the travel path 8 can also be arranged above and below the metal sheet 1.
  • preheating source 4 is only optionally available.
  • FIG. 4 shows a cooling curve, in which
  • the temperature level at the end of the reheating is set by the speed-dependent variation of the heating power of the Nachracermario.
  • the heating rate K / s is different.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laser Beam Processing (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention relates to a method and a device for laser welding with the goal of avoiding cracks immediately after the welding process, and of increasing the energy content of the seam region in order to reduce the cooling speed for improved adjustment of the material properties. For this purpose, the invention provides with respect to the method that the starting time for beginning the reheating based on the termination of the welding process can be set independently of the speed of the feed rate of the laser (2). With respect to the device, the invention provides that the laser (2) is disposed on a carriage (6) that can be displaced parallel to the weld seam (3) to be fabricated, and that the preheating source (4) and the reheating source (5) are likewise disposed on carriages (6, 7), the direction of movement of which corresponds to that of the laser (2).

Description

VERFAHREN UND VORRICHTUNG ZUM SCHWEISSEN VON BLECHEN MIT EINER VOR- UND/ODER NACHERWÄRMUNGVORRI CHTUNG METHOD AND DEVICE FOR WELDING LEADS WITH PRE-AND / OR NON-HEATING PREPARATION
Die Erfindung betrifft ein Verfahren zum Schweißen von Blechen mit einer Vor- und/oder Nacherwärmung im Bereich der Schweißnaht, sowie eine Vorrichtung hierzu.The invention relates to a method for welding sheets with a pre- and / or reheating in the region of the weld, and a device for this purpose.
Die Verschweißung von Bändern in Bandschweißmaschinen, also beispielsweise das Band an Band schweißen für Coil-Linien, erfordert für die unterschiedlichen zu verschweißenden Bänder (Dicke, Stahlqualität) eine hohe Flexibilität bei der Wärmebehandlung.The welding of strips in strip welding machines, for example, the strip-to-strip welding for coil lines, requires a high degree of flexibility in the heat treatment for the different strips to be welded (thickness, steel quality).
Typischerweise werden dünne Bänder mit größeren Schweißgeschwindigkeiten verschweißt als dicke Bänder, wobei allerdings die Schweißgeschwindigkeit bei gleicher Dicke zusätzlich schwanken kann (z. B. Stahlqualitätsabhängig).Typically, thin strips are welded at higher welding speeds than thick strips, although the welding speed can vary additionally with the same thickness (for example, depending on steel quality).
Aus der DE 10 2004 001 166 A1 ist es bekannt, bei Laserschweißen eine Vor- und/oder Nacherwärmung des Schweißnahtbereiches vorzunehmem, um damit einen Verlust an Duktilität im Nahtbereich möglichst gering zu halten.From DE 10 2004 001 166 A1 it is known to carry out a pre-heating and / or reheating of the weld seam area during laser welding in order to minimize the loss of ductility in the seam area.
Diese Wärmebehandlung kann dabei auf zwei verschiedene Arten erfolgen, und zwar wird mit dem selben Laser gearbeitet der auch für die Schweißung eingesetzt wird.This heat treatment can be done in two different ways, and that is done with the same laser used for the welding.
Der Laser kann dabei mit im Wesentlichen gleicher Leistung wie beim Schweißen, gleicher Fokussierung aber erhöhter Vorschubgeschwindigkeit gefahren werden.The laser can be driven with substantially the same performance as when welding, the same focus but increased feed speed.
Alternativ kann der Laser mit im Wesentlichen gleicher Leistung, erhöhter Fokussierung und ggf. verringertem Vorschub gefahren werden.Alternatively, the laser can be driven with substantially the same power, increased focus and possibly reduced feed.
Ziel der Vorwärmung ist die Rissvermeidung unmittelbar nach dem Schweißvorgang und die Erhöhung des Energieinhaltes des Nahtbereiches zur Reduzierung der Abkühlungsgeschwindigkeit zur besseren Einstellung der Materialeigenschaften unmittelbar nach dem Schweißen.The aim of preheating is to avoid cracking immediately after the welding process and increase the energy content of the seam area to reduce the cooling rate for better adjustment of the material properties immediately after welding.
Die Nacherwärmung dient dabei zur weiteren Reduzierung der Abkühlgeschwindigkeit und/oder des Haltens der Temperatur zum Zwecke der Wärmebehandlung der Schweißnaht und deren Umgebung. Es kann damit auch eine Wiedererwärmung erfolgen.The reheating serves to further reduce the cooling rate and / or holding the temperature for the purpose of heat treatment of the weld and their environment. It can also be done with a reheat.
Aufgabe der Erfindung ist es, die Flexibilität der Wärmebehandlung zu verbessern.The object of the invention is to improve the flexibility of the heat treatment.
Gelöst wird diese Aufgabe erfindungsgemäß bei einem Verfahren zum Schweißen von Blechen mit einer Vor- und/oder Nacherwärmung im Bereich der Schweißnaht, dadurch, dass der Startzeitpunkt für den Beginn der Nacherwärmung bezogen auf die Beendigung des Schweißvorganges unabhängig von der Geschwindigkeit des Vorschubes des Schweißgerätes einstellbar ist.This object is achieved according to the invention in a method for welding sheets with a preheating and / or reheating in the weld, characterized in that the starting time for the beginning of the reheating relative to the completion of the welding process regardless of the speed of feed of the welding device adjustable is.
Dadurch kann eine sehr flexible Wärmebehandlung vorgenommen werden, und zwar insbesondere unabhängig vom vorausgehenden Schweißen.As a result, a very flexible heat treatment can be carried out, in particular independently of the preceding welding.
Dabei kann die Nachwärmquelle dem Laser nachgeführt werden, wobei der Abstand zwischen dem Schweißgerät und der Nachwärmquelle einstellbar ist.In this case, the Nachwärmquelle be tracked to the laser, the distance between the welding device and the Nachwärmquelle is adjustable.
Nach einer Ausgestaltung der Erfindung ist das Schweißgerät an einem Fahrwagen angeordnet, der parallel zur zu legenden Schweißnaht verfahrbar ist und die Vorwärmquelle und die Nachwärmquelle sind ebenfalls an Fahrwagen angeordnet, deren Bewegungsrichtung der des Schweißgerätes entspricht.According to one embodiment of the invention, the welding device is arranged on a carriage, which is movable parallel to the welding seam to be laid and the preheating and the Nachwärmquelle are also arranged on carriages whose direction of movement corresponds to that of the welding machine.
Die Vorwärmquelle und die Nachwärmquelle können an getrennten Fahrwagen angeordnet sein.The preheating and the Nachwärmquelle can be arranged on separate carriages.
Dabei ist es möglich, dass am Fahrwagen für das Schweißgerät auch die Vorwärmquelle angeordnet ist.It is possible that the carriage for the welding device and the preheating source is arranged.
Nach einer weiteren Ausgestaltung kann aber auch für die Vorwärmquelle und die Nachwärmquelle ein gemeinsamer Fahrwagen vorgesehen sein, wobei aber die Nachwärmquelle zusätzlich relativ zum Fahrwagen verschiebbar gelagert ist.According to a further embodiment, but also for the preheating and the Nachwärmquelle a common trolley may be provided, but the Nachwärmquelle is additionally slidably mounted relative to the carriage.
Die Fahrwagen können - nach einer weiteren Ausführung - oberhalb der zu legenden Schweißnaht angeordnet sind bzw. alternativ kann der Fahrwagen für die Vorwärmquelle oberhalb und der Fahrwagen für die Nachwärmquelle unterhalb des zu schweißenden Bleches verfahrbar sein. Vorzugsweise sind die Fahrwagen unabhängig voneinander antreibbar.The carriages can - are arranged above the weld to be laid according to a further embodiment or alternatively, the carriage for the preheating source above and the carriage for the Nachwärmquelle be moved below the sheet to be welded. Preferably, the carriages are independently drivable.
Es sei an dieser Stelle bemerkt, dass der hier verwendete Begriff des Fahrwagens für eine mobile Einrichtung steht, an der das Gerät zum Schweißen und die Wärmequellen angeordnet sind, so dass diese örtlich veränderbar sind.It should be noted at this point that the term of the trolley used here stands for a mobile device, on which the device for welding and the heat sources are arranged, so that they are locally variable.
Beispiele hierfür sind einerseits Wagen ähnliche Konstruktionen aber auch Gleitführungen oder Magnetführungen.Examples of this are on the one hand carriage-like constructions but also sliding guides or magnetic guides.
Für die Vor- und/oder Nacherwärmung können Linieninduktoren oder vergleichbare Wärmequellen vorgesehen sein.For the pre- and / or reheating line inductors or comparable heat sources can be provided.
Vorzugsweise kommt als Schweißgerät erfindungsgemäß ein Laser zum Einsatz.Preferably, a laser is used according to the invention as a welding device.
Die Erfindung soll nachfolgend näher erläutert werden, und zwar mit Bezug auf die Zeichnungen.The invention will be explained in more detail below, with reference to the drawings.
Dabei zeigen dieThe show
Figuren 1-3 schematisch verschiedene Ausführungsbeispiele für die Fahrwagen und Figur 4 eine AbkühlungskurveFigures 1-3 schematically different embodiments for the carriage and Figure 4 is a cooling curve
Bei den in den Figuren 1 bis 3 gezeigten Ausführungsbeispielen wird von von zwei ortsfest angeordneten Blechen 1 ausgegangen, die Band an Band miteinander zu verschweißen sind.In the embodiments shown in Figures 1 to 3 is assumed by two fixedly arranged sheets 1, the band are to be welded together to tape.
Die Schweißrichtung liegt dabei in der Papierebene, verläuft als von rechts nach links.The direction of welding lies in the plane of the paper, running from right to left.
Dargestellt sind immer die drei Einrichtungen, und zwar der Laserkopf 2, der denShown are always the three facilities, namely the laser head 2, the
Schweißpunkt 3 in der Naht bestimmt, sowie die Vorwärmquelle 4 und die NachwärmquelleWelding point 3 determined in the seam, and the preheating 4 and the Nachwärmquelle
5. Beide sind hier als Induktoren bezeichnet.5. Both are referred to herein as inductors.
Nach dem in Figur 1 gezeigten Ausführungsbeispiel trägt ein Fahrwagen 6 den Laser und die Vorwärmquelle 4.According to the embodiment shown in FIG. 1, a carriage 6 carries the laser and the preheating source 4.
Die Nachwärmquelle 5 ist an einem eigenen Fahrwagen 7 angeordnet. Da die Fahrwagen 6 und 7 getrennt antreibbar sind, kann die Bewegung oder Verschiebung des hinteren Fahrwagens 7 unabhängig von dem vorderen Fahrwagen 6 erfolgen. Damit lässt sich dann - A -The Nachwärmquelle 5 is arranged on a separate carriage 7. Since the carriages 6 and 7 are driven separately, the movement or displacement of the rear carriage 7 can be carried out independently of the front carriage 6. This can then be done - A -
aber auch der Abstand A einstellen, was wiederum bedeutet, dass der Startzeitpunkt für denbut also set the distance A, which in turn means that the starting time for the
Beginn der Nacherwärmung unabhängig von der Beendigung des Schweißvorganges einstellbar ist.Start of reheating is independent of the termination of the welding process is adjustable.
Die beiden Fahrwagen 6 und 7 können auf einem Schienensystenn oder einem entsprechenden Fahrweg 8 bewegt werden.The two carriages 6 and 7 can be moved on a rail system or a corresponding track 8.
Wie oben bereits erwähnt, sind die Fahrwagen nur als Synonym für eineAs mentioned above, the vehicles are only synonymous with a
Bewegungseinrichtung dargestellt worden.Movement device has been shown.
Die Figur 2 zeigt in Abwandlung der Figur 1 lediglich, dass der Fahrweg 8 auch ober- und unterhalb des Bleches 1 angeordnet sein kann.FIG. 2 shows, in a modification of FIG. 1, only that the travel path 8 can also be arranged above and below the metal sheet 1.
Bei dem weiteren Ausführungsbeispiel nach Figur 3 ist für die Vorwärmquelle 4, den Laser 2 und die Nachwärmquelle 5 ein gemeinsamer Fahrwagen 9 dargestellt, wobei allerdings in oder an diesem der Fahrwagen 7 relativ verschiebbar angeordnet ist.In the further embodiment of Figure 3, a common carriage 9 is shown for the preheating 4, the laser 2 and the Nachwärmquelle 5, but in or on this, the carriage 7 is arranged relatively displaceable.
Es sei noch erwähnt, dass die Vorwärmquelle 4 nur optional vorhanden ist.It should be noted that the preheating source 4 is only optionally available.
Die Figur 4 zeigt schließlich eine Abkühlungskurve, wobeiFinally, FIG. 4 shows a cooling curve, in which
t_s der Schweißzeitpunkt t_nθ die Startzeit der Nacherwärmung t_n1 die Endzeit der Nacherwärmung sind.t_s the welding time t_nθ the start time of reheating t_n1 are the end time of reheating.
Ein vergleichbarer Wärmebehandlungsprozeß bezüglich des Startzeitpunktes der Nacherwärmung ist bei unterschiedlichen Schweißgeschwindigkeiten v nur durch die Variation des Abstandes A zwischen Laser und Nachwärmquelle möglich, wobei fürA comparable heat treatment process with respect to the starting time of reheating is possible at different welding speeds v only by the variation of the distance A between the laser and the reheat source, wherein for
A=v* (t_nθ - t_s) gilt.A = v * (t_nθ - t_s) holds.
Das Temperatumiveau am Ende der Nacherwärmung wird durch die geschwindigkeitsabhängige Variation der Heizleistung der Nachwärmquelle eingestellt. Die Aufheizrate K/s unterscheidet sich. The temperature level at the end of the reheating is set by the speed-dependent variation of the heating power of the Nachwärmquelle. The heating rate K / s is different.

Claims

Patentansprüche claims
1. Verfahren zum Schweißen von Blechen mit einer Vor- und/oder Nacherwärmung im Bereich der Schweißnaht, dadurch gekennzeichnet, dass der Startzeitpunkt für den Beginn der Nacherwärmung bezogen auf die Beendigung des Schweißvorganges unabhängig von der Geschwindigkeit des Vorschubes des Schweißgerätes einstellbar ist.1. A method for welding sheets with a preheating and / or reheating in the region of the weld, characterized in that the starting time for the beginning of the reheating based on the completion of the welding process is independent of the speed of the feed of the welding device adjustable.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Nachwärmquelle dem Schweißgerät nachgeführt wird und dass der Abstand zwischen dem Schweißgerät und der Nachwärmquelle einstellbar ist.2. The method according to claim 1, characterized in that the Nachwärmquelle is tracked to the welding device and that the distance between the welding device and the Nachwärmquelle is adjustable.
3. Vorrichtung zum Schweißen mit einem Schweißgerät für die Ausführung des Schweißvorganges und einer Vor- und/oder Nachwärmquelle, dadurch gekennzeichnet, dass das Schweißgerät (2) an einem Fahrwagen (6) angeordnet ist, der parallel zur zu legenden Schweißnaht verfahrbar ist und dass die Vorwärmquelle (4) und die Nachwärmquelle (5) ebenfalls an Fahrwagen (6,7) angeordnet sind, deren Bewegungsrichtung der des Schweißgerätes entspricht.3. Apparatus for welding with a welding apparatus for performing the welding operation and a pre- and / or Nachwärmquelle, characterized in that the welding device (2) on a carriage (6) is arranged, which is movable parallel to the welding seam to be laid and that the preheating source (4) and the reheating source (5) are likewise arranged on carriages (6, 7) whose direction of movement corresponds to that of the welding apparatus.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass Vorwärmquelle (4) und Nachwärmquelle (5) an getrennten Fahrwagen (6 bzw.7) angeordnet sind.4. Apparatus according to claim 3, characterized in that preheating source (4) and Nachwärmquelle (5) on separate carriages (6 bzw.7) are arranged.
5. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass am Fahrwagen (6) für das Schweißgerät (2) auch die Vorwärmquelle (4) angeordnet ist. 5. Device according to one of the preceding claims, characterized in that the carriage (6) for the welding device (2) and the preheating source (4) is arranged.
6. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass für die Vorwärmquelle (4) und die Nachwärmquelle (5) ein gemeinsamer Fahrwagen (9) vorgesehen ist, wobei aber die Nachwärmquelle (5) zusätzlich relativ zum Fahrwagen (9) verschiebbar angeordnet ist.6. Device according to one of the preceding claims, characterized in that for the preheating source (4) and the Nachwärmquelle (5) a common carriage (9) is provided, but arranged the Nachwärmquelle (5) in addition relative to the carriage (9) slidably is.
7. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Fahrwagen (6,7) oberhalb der zu legenden Schweißnaht angeordnet sind.7. Device according to one of the preceding claims, characterized in that the carriages (6,7) are arranged above the weld to be laid.
8. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Fahrwagen (6) für die Vorwärmquelle (4) oberhalb und der Fahrwagen (7) für die Nachwärmquelle (5) unterhalb des zu schweißenden Bleches (1 ) verfahrbar ist.8. Device according to one of the preceding claims, characterized in that the carriage (6) for the preheating source (4) above and the carriage (7) for the Nachwärmquelle (5) below the sheet to be welded (1) is movable.
9. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Fahrwagen (6,7) unabhängig voneinander antreibbar sind.9. Device according to one of the preceding claims, characterized in that the carriages (6,7) are independently drivable.
10. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Schweißgerät ein Laser ist. 10. Device according to one of the preceding claims, characterized in that the welding device is a laser.
PCT/DE2007/002131 2006-12-22 2007-11-23 Method and device for welding sheet metal having a preheat and/or reheating device WO2008077364A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102006062202.2 2006-12-22
DE102006062202 2006-12-22
DE102007023998.1 2007-05-22
DE102007023998 2007-05-22
DE102007031950A DE102007031950A1 (en) 2006-12-22 2007-07-06 Method and apparatus for welding
DE102007031950.0 2007-07-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114871566A (en) * 2022-04-15 2022-08-09 湖北文理学院 Welding equipment with partitioned auxiliary heating device, welding system and welding control method

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