DE102011054685A1 - Welding process of workpiece e.g. pipe, involves introducing electric current from welding tool to workpiece after making contact between immersed agitation point of welding tool and plasticized material of workpiece - Google Patents
Welding process of workpiece e.g. pipe, involves introducing electric current from welding tool to workpiece after making contact between immersed agitation point of welding tool and plasticized material of workpiece Download PDFInfo
- Publication number
- DE102011054685A1 DE102011054685A1 DE102011054685A DE102011054685A DE102011054685A1 DE 102011054685 A1 DE102011054685 A1 DE 102011054685A1 DE 102011054685 A DE102011054685 A DE 102011054685A DE 102011054685 A DE102011054685 A DE 102011054685A DE 102011054685 A1 DE102011054685 A1 DE 102011054685A1
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- Germany
- Prior art keywords
- welding
- workpiece
- support element
- welding tool
- tool
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/123—Controlling or monitoring the welding process
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1265—Non-butt welded joints, e.g. overlap-joints, T-joints or spot welds
Abstract
Description
Die Erfindung betrifft ein Schweißverfahren gemäß dem Oberbegriff des Anspruchs 1 sowie eine Schweißvorrichtung gemäß dem Oberbegriff des Anspruchs 9.The invention relates to a welding method according to the preamble of
Aus der
Beim Rührreibschweißen entsteht eine Schweißnaht, die an der der Schulter zugewandten Oberfläche des Werkstückes durch die Fläche der rotierenden Reibschulter bedingt deutlich strukturiert und breit ist und sich zum Werkstückinneren hin verjüngt. Nachteilig ist, dass die rotierende Schulter das Rührreibschweißen bei zahlreichen Geometrien nur eingeschränkt oder gar nicht erlaubt, zum Beispiel beim Eckstoß aneinander zu fügender Werkstückteile.Friction stir welding produces a weld seam which, due to the surface of the rotating friction shoulder, is clearly structured and wide at the shoulder-facing surface of the workpiece and tapers towards the workpiece interior. The disadvantage is that the rotating shoulder the friction stir welding in many geometries only limited or not allowed, for example, the corner joint to be joined workpiece parts.
Es ist nun Aufgabe der vorliegenden Erfindung, ein Schweißverfahren sowie eine Schweißvorrichtung der eingangs genannten Art zur Verfügung zu stellen, bei denen gegenüber dem Stand der Technik die Prozesskräfte reduziert sind und zudem mit dem Rührreibschweißen gemäß dem Stand der Technik nicht fügbare Bauteilgeometrien gefügt werden können.It is an object of the present invention to provide a welding method and a welding device of the type mentioned above, in which the process forces are reduced compared to the prior art and, moreover, component geometries which are not available with friction stir welding according to the state of the art can be added.
Diese Aufgabe wird bei einem Schweißverfahren der eingangs genannten Art durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Bei einer Schweißvorrichtung der eingangs genannten Art wird die Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 9 gelöst. Vorteilhafte Ausführungsformen der Erfindung sind durch die Unteransprüche definiert.This object is achieved in a welding method of the type mentioned by the characterizing features of
Das erfindungsgemäße Schweißverfahren stellt ein Rührschweißverfahren dar, bei dem das Material eines Werkstückes plastifiziert wird. Unter einem Werkstück wird im Folgenden auch eine Mehrheit von Werkstückteilen verstanden, die im Schweißprozess aneinander gefügt werden. Der Fügeprozess bedingt im Allgemeinen das Plastifizieren von Material aller aneinander zu fügenden Werkstückteile.The welding method according to the invention represents a stirring-welding method in which the material of a workpiece is plasticized. In the following, a workpiece is also understood to mean a majority of workpiece parts which are joined to one another in the welding process. The joining process generally involves the plastification of material of all workpiece parts to be joined together.
Die für das Plastifizieren notwendige Prozesswärme wird von außen mittels eines elektrischen Stromes in das Werkstück gebracht. Dabei wird das plastifizierte Material mittels einer an einem Schweißwerkzeug angeordneten, in das plastifizierte Material eingetauchten rotierenden Rührspitze gerührt. Zum Erzeugen der Schweißnaht wird das Schweißwerkzeug mit der eingetauchten Rührspitze relativ zum Werkzeug bewegt. Der elektrische Strom kann hochfrequent oder gerichtet sein und wird bevorzugt über das Schweißwerkzeug selbst in das Werkstück gegeben. Der durch Rotation der Rührspitze im Werkstück erzeugte Wärmestrom kann in erster Näherung vernachlässigt werden und beträgt allenfalls weniger als 10%, bevorzugt weniger als 1% des insgesamt durch den Schweißvorgang eingebrachten Wärmestroms. Der Wärmeeintragungsanteil der Rührspitze kann in der Regel gegenüber dem durch den Strom eingebrachten Anteil nahezu vernachlässigt werden.The process heat necessary for plasticizing is brought into the workpiece from outside by means of an electric current. In this case, the plasticized material is stirred by means of a arranged on a welding tool, immersed in the plasticized material rotating stirring tip. To create the weld, the welding tool with the immersed stirring tip is moved relative to the tool. The electric current can be high-frequency or directed and is preferably given via the welding tool itself in the workpiece. The heat flow generated by rotation of the stirring tip in the workpiece can be neglected in a first approximation and is at most less than 10%, preferably less than 1% of the total introduced by the welding heat flow. The heat input portion of the stirring tip can be almost neglected compared to the introduced by the current share in the rule.
Da der Prozess somit nicht mehr auf Reibwärme angewiesen ist, wird auf eine mit der Rührspitze mitrotierende Schulter als zusätzliches rotierendes Element verzichtet. Stattdessen können ein oder mehrere Stützelemente vorgesehen werden. Unter einem Stützelement wird im Folgenden ein den Durchmesser der einzutauchenden Rührspitze übersteigendes Bestandteil des Schweißwerkzeuges gesehen, das unterschiedlichste Formen annehmen kann, auch die Form einer Schulter. Das Stützelement kann als Begrenzung für die Masse des plastifizierten Materials dienen und somit dafür sorgen, dass das plastifizierte Material nicht aus dem Fügebereich hinausgedrückt wird. Mit nicht rotierenden Stützelementen können auch Geometrien, z.B. Eckstöße, zuverlässig und mit geringem Aufwand gefügt werden, die im Falle des Rührreibschweißens aufgrund der rotierenden Schulter entweder nicht oder nur mit besonders aufwändigen Maßnahmen fügbar sind.Since the process is thus no longer dependent on frictional heat, is dispensed with a co-rotating with the stirring tip shoulder as an additional rotating element. Instead, one or more support elements may be provided. In the following, a support element is considered to be a component of the welding tool which exceeds the diameter of the stirring tip to be immersed and which can take on a very wide variety of forms, including the shape of a shoulder. The support element can serve as a limitation for the mass of the plasticized material and thus ensure that the plasticized material is not pushed out of the joint area. With non-rotating support elements, geometries, e.g. Corner joints are joined reliable and with little effort, which are in the case of Rührreibschweißens due to the rotating shoulder either not or only with particularly complex measures are available.
Der zur Erwärmung dienende elektrische Strom kann über die Rührspitze und/oder über das mindestens eine Stützelement geleitet werden. Alternativ ist eine gesonderte, z. B. der Rührspitze und soweit vorhanden dem Stützelement vorlaufende Stromeinkopplungsvorrichtung denkbar. Als Material für die Rührspitze werden bevorzugt Wolfram oder Wolframlegierungen eingesetzt, welche hinsichtlich der notwendigen elektrischen Stromflüsse und den auftretenden Temperaturen eine hinreichende Stabilität aufweisen.The electrical current used for heating can be conducted via the stirring tip and / or via the at least one support element. Alternatively, a separate, z. As the Rührspitze and as far as the support element leading current injection device conceivable. As the material for the stirring tip tungsten or tungsten alloys are preferably used, which have a sufficient stability in terms of the necessary electrical current flows and the temperatures occurring.
Der Verzicht auf eine rotierende Schulter zur Erzeugung der Prozesswärme führt mit sich, dass die Prozesskräfte deutlich verringert werden. Das mindestens eine Stützelement kann gleitend über die Werkstückoberfläche geführt werden. Je nach Werkstückgeometrie kann das Stützelement ganz entfallen, mit gegenüber dem Rührreibschweißen geringerer Fläche oder in seiner Form an das Werkstück angepasst ausgebildet werden. The absence of a rotating shoulder to generate the process heat means that the process forces are significantly reduced. The at least one support element can be slidably guided over the workpiece surface. Depending on the workpiece geometry, the support element can be dispensed with completely, with a reduced surface area compared to the friction stir welding or adapted in its shape to the workpiece.
Aufgrund der Reduktion der Prozesskräfte ist somit ein Einsatz des Rührschweißens auch bei solchen Profilen möglich, die eine lediglich geringe Steifigkeit aufweisen und für die Prozesskräfte des Rührreibschweißens nicht geeignet wären.Due to the reduction of the process forces, the use of stir welding is therefore also possible in the case of those profiles which have only low rigidity and would not be suitable for the process forces of friction stir welding.
Im Folgenden werden beispielhafte Ausführungsformen des erfindungsgemäßen Schweißverfahrens sowie der erfindungsgemäßen Schweißvorrichtung anhand von Figuren dargestellt.In the following, exemplary embodiments of the welding method according to the invention and the welding device according to the invention are illustrated by means of figures.
Es zeigt schematischIt shows schematically
Ein Blockelement
Mittels einer Spannungsquelle
Der hochfrequente Wechselstrom wird wiederum über den Werkzeugstift
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Werkstückteil Workpiece part
- 22
- Werkstückteil Workpiece part
- 33
- Schweißwerkzeug welding tool
- 44
- Werkzeugstift pen tool
- 55
- Stützelement support element
- 66
- Rührspitze stirrer tip
- 77
- Wechselspannungsquelle AC voltage source
- 88th
- Kontaktelement contact element
- 99
- Blockelement block member
- 1111
- Werkstückteil Workpiece part
- 1212
- Werkstückteil Workpiece part
- 1313
- Schweißwerkzeug welding tool
- 1414
- Werkzeugstift pen tool
- 1515
- Stützelement support element
- 1616
- Rührspitze stirrer tip
- 1818
- Gegenstützelement Against support element
- 2121
- U-Profill U-Profill
- 2222
- U-Profil U-profile
- 2323
- Schweißwerkzeug welding tool
- 2424
- Werkzeugstift pen tool
- 2525
- Stützelement support element
- 2626
- Backenstück Back piece
- 2727
- Backenstück Back piece
- 2828
- Kontaktelement contact element
- 2929
- Schenkel leg
- 3030
- Schenkel leg
- 3131
- Werkstückteil Workpiece part
- 3333
- Schweißwerkzeug welding tool
- 3535
- Stützelement support element
- 4040
- obere Schweißnaht upper weld
- 4141
- untere Schweißnaht bottom weld
- 5050
- Abdruck des Stützelements Impression of the support element
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- US 5829664 [0002] US 5829664 [0002]
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011054685A DE102011054685A1 (en) | 2011-10-21 | 2011-10-21 | Welding process of workpiece e.g. pipe, involves introducing electric current from welding tool to workpiece after making contact between immersed agitation point of welding tool and plasticized material of workpiece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011054685A DE102011054685A1 (en) | 2011-10-21 | 2011-10-21 | Welding process of workpiece e.g. pipe, involves introducing electric current from welding tool to workpiece after making contact between immersed agitation point of welding tool and plasticized material of workpiece |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011054685A1 true DE102011054685A1 (en) | 2013-04-25 |
Family
ID=48051029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102011054685A Ceased DE102011054685A1 (en) | 2011-10-21 | 2011-10-21 | Welding process of workpiece e.g. pipe, involves introducing electric current from welding tool to workpiece after making contact between immersed agitation point of welding tool and plasticized material of workpiece |
Country Status (1)
Country | Link |
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DE (1) | DE102011054685A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5829664A (en) | 1996-11-15 | 1998-11-03 | Aluminum Company Of America | Resistance heated stir welding |
DE19746308A1 (en) * | 1997-10-21 | 1999-04-22 | Burkhardt Prof Dr Dr Suthoff | Linear weld joint is produced by a friction lap welding process |
JPH11320128A (en) * | 1998-05-22 | 1999-11-24 | Nippon Light Metal Co Ltd | Probe for inside corner friction agitation joining and inside corner friction joining method using it |
DE102005029882A1 (en) * | 2005-06-27 | 2006-12-28 | Gkss-Forschungszentrum Geesthacht Gmbh | Friction stir welding apparatus includes first inner segment surrounding a pin and having first friction surface segment surrounding the first inner segment and rotationally driven independently of the first inner segment |
DE102005030800A1 (en) * | 2005-06-29 | 2007-01-04 | Eads Deutschland Gmbh | Friction-stir weld tool for aerospace, automotive or railway systems has drive shank linked to weld pin by slip bearing |
DE102005060178A1 (en) * | 2005-12-14 | 2007-06-21 | Eads Deutschland Gmbh | Friction stir tool with conformable shoulder |
-
2011
- 2011-10-21 DE DE102011054685A patent/DE102011054685A1/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5829664A (en) | 1996-11-15 | 1998-11-03 | Aluminum Company Of America | Resistance heated stir welding |
DE19746308A1 (en) * | 1997-10-21 | 1999-04-22 | Burkhardt Prof Dr Dr Suthoff | Linear weld joint is produced by a friction lap welding process |
JPH11320128A (en) * | 1998-05-22 | 1999-11-24 | Nippon Light Metal Co Ltd | Probe for inside corner friction agitation joining and inside corner friction joining method using it |
DE102005029882A1 (en) * | 2005-06-27 | 2006-12-28 | Gkss-Forschungszentrum Geesthacht Gmbh | Friction stir welding apparatus includes first inner segment surrounding a pin and having first friction surface segment surrounding the first inner segment and rotationally driven independently of the first inner segment |
DE102005030800A1 (en) * | 2005-06-29 | 2007-01-04 | Eads Deutschland Gmbh | Friction-stir weld tool for aerospace, automotive or railway systems has drive shank linked to weld pin by slip bearing |
DE102005060178A1 (en) * | 2005-12-14 | 2007-06-21 | Eads Deutschland Gmbh | Friction stir tool with conformable shoulder |
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R012 | Request for examination validly filed | ||
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R003 | Refusal decision now final |