DE19731638A1 - Procedure for making frictional spot-welded joints using rubbing pin - Google Patents

Procedure for making frictional spot-welded joints using rubbing pin

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Publication number
DE19731638A1
DE19731638A1 DE1997131638 DE19731638A DE19731638A1 DE 19731638 A1 DE19731638 A1 DE 19731638A1 DE 1997131638 DE1997131638 DE 1997131638 DE 19731638 A DE19731638 A DE 19731638A DE 19731638 A1 DE19731638 A1 DE 19731638A1
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DE
Germany
Prior art keywords
workpieces
bolt
pin
pressure
welding process
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Withdrawn
Application number
DE1997131638
Other languages
German (de)
Inventor
Andreas Schaaf
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Individual
Original Assignee
Individual
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Filing date
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Application filed by Individual filed Critical Individual
Priority to DE1997131638 priority Critical patent/DE19731638A1/en
Publication of DE19731638A1 publication Critical patent/DE19731638A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0681—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding created by a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis

Abstract

A procedure for making spot-type weld joints using a rubbing pin has a rotating pin (3), lying from the opposite side of the joint zone, penetrating into the one of the workpieces to be joined without piercing it. In the region of the joint zone, the workpieces are pressed together by the pressure of the pin and an axial fixing of the opposite piece. The rubbing and the pressure in the region of the joint zone effect a temperature increase. The pin is withdrawn again after the welding process or remains as a unit on the joint. For jointing with the pins remaining, the drive unit (8) is stopped shortly before the end of the welding process.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer punktförmigen Schweißverbindung zwischen zwei oder mehreren Werkstücken mittels eines rotierenden Reibbolzens. Insbesondere ein Verfahren zur Herstellung einer Verbindung, bei der mindestens ein Werkstück an der Fügestelle einen dünnwandigen Querschnitt aufweist.The invention relates to a method for producing a point weld connection between two or more workpieces using a rotating friction pin. In particular, a method for producing a compound in which at least one Workpiece has a thin-walled cross section at the joint.

Es sind bereits unterschiedliche Verbindungstechniken zur Herstellung von Punktschweißverbindungen bekannt. In der Automobilindustrie haben sich bei Dünnblechen insbesondere die elektrischen Punktschweißverbindungen durchgesetzt.There are already different connection technologies for the production of Spot welds known. In the automotive industry, thin sheet metal in particular the electrical spot welding connections.

Praktisch haben sich dies Verbindungen allerdings nur für Stahlblechkonstruktionen durchgesetzt. So werden beispielsweise die Schweißelektroden beim Punktschweißen von Aluminiumblechen schon nach wenigen Schweißungen unbrauchbar.In practice, however, these connections only apply to sheet steel constructions enforced. For example, the welding electrodes used for spot welding of Aluminum sheets are unusable after only a few welds.

Bei den heute verstärkt aufkommenden Materialien, wie z. B. Alu und Magnesium sowie den Materialkombinationen Alu-Stahl, Magnesium-Stahl, Magnesium-Alu, stellt das Fügen mittels eines rotierenden Reibbolzens eine wesentliche Verbesserung dar.With today's increasingly emerging materials such. B. aluminum and magnesium and Material combinations aluminum-steel, magnesium-steel, magnesium-aluminum, represents the joining by of a rotating friction pin represents a significant improvement.

Es lassen sich erhebliche Verbesserung der Qualität in Bezug auf die Festigkeit, der Verwendung unterschiedlicher Materialkombiation sowie der optische Eigenschaft erzielen. Materialvorbereitung und Einsatz von Zusatzwerkstoffen sind nicht erforderlich. Die Standzeiten der Werkzeuge sind im Gegensatz zum elektrischen Punktschweißen beim Aluminium oder Magnesium nahezu unbegrenzt.There can be significant quality improvements in terms of strength that Achieve use of different material combinations as well as the optical property. Material preparation and use of filler materials are not necessary. The In contrast to electrical spot welding, tool life is reduced Almost unlimited aluminum or magnesium.

Der Anmeldung liegt die Aufgabe zugrunde, ein Verfahren zum Punktschweißen so zu entwickeln, daß es möglich ist moderne Werkstoffe und unterschiedliche Werkstoffkombinationen fest, schnell, zuverlässig und kostengünstig zu verbinden.The registration is based on the task of a method for spot welding develop that it is possible to use modern materials and different Combining material combinations firmly, quickly, reliably and cost-effectively.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst, bei der ein rotierender Bolzen von der gegenüberliegenden Seite der Fügezone liegend in das eine der zu verbindenden Werkstücke eindringt. Die Reibung und der Druck erzeugen in der Fügezone eine intensive lokale Erwärmung, die in Verbindung mit der einhergehenden Mikroverformung in der Fügezone ein Aufreißen der Passivschichten bewirkt. Durch den Druck tritt ähnlich dem Mechanismus des Preßschweißens eine unlösbare Verbindung zwischen den Werkstücken ein.According to the invention, this object is achieved by the features of claim 1, in which a rotating bolt lying on the opposite side of the joining zone in one of the connecting workpieces penetrates. The friction and pressure create in the joining zone intense local warming associated with the associated microforming causes the passive layers to tear open in the joining zone. The pressure occurs similar to that Mechanism of pressure welding an inseparable connection between the workpieces.

Die Erfindung soll an nachstehendem Ausführungsbeispiel und Zeichnungen erläutert werden.The invention will be explained using the following exemplary embodiment and drawings.

Fig. 1 bis 4 zeigt die Querschnittsansichten zweier Werkstücke in aufeinanderfolgenden Phasen bei der Herstellung eines Werkstückverbundes ohne verbleibenden Reibbolzen. Fig. 5 und 6 zeigen die Phasen bei Herstellung eines Verbundes mit verbleibendem Reibbolzen (3). Fig. 7 bis 8 stellen Verbesserungen des Verfahrens dar, wobei Fig. 7 eine Wulstabtrennenvorrichtung (6) und Fig. 8 ein Niederhalter (7) darstellen. In Fig. 9 sieht man wie ein Verbund von mehr als zwei Werkstücken hergestellt werden kann. Figs. 1 to 4 shows the cross-sectional views of two workpieces at successive stages in the manufacture of a composite workpiece without remaining friction pin. Fig. 5 and 6 show stages in production of a composite with residual friction pin (3). FIGS. 7 to 8 improvements with Fig. 7 represent a Wulstabtrennenvorrichtung (6) and Fig. 8, a holding-down device (7) illustrate the method. Can be in FIG. 9 is seen as a composite of more than two workpieces produced.

Fig. 1 zeigt zwei plattenförmige, aufeinanderliegende Werkstücke 1 und 2, die beispielsweise Bleche oder Teile von miteinander zu verbindenden Hohlprofilen sein können. Werkstück 2 muß gegenüber dem rotierenden Bolzen, über eine Gegenhaltekraft lagefixiert sein. Ein rotierender Bolzen (3) wird gegen die Oberfläche des Werkstück 1 bewegt und unter Beibehaltung seiner Drehung fest gegen beide Werkstücke angedrückt, ohne daß dieser das Werkstück 1 durchdringt. Da durch das Reiben in kurzer Zeit hohe Energiemengen frei werden, kommt es im Bereich der Fügeszone (4) zu lokalen Temperaturerhöhungen. Die mit der Temperatur und Druck einhergehenden Mikroverformungen an den Oberflächen bewirken, daß die im Bereich der Fügezone (4) liegenden Passivschichten aufgebrochen werden. Die darunterliegenden energiereichen Aktivschichten sind bindungsfähig. Unter Druck und Temperatur findet nun ähnlich dem Mechanismus des Preßschweißen der Fügevorgang statt. Anschließend kann der Bolzen entweder vom Werkstück 1 zurückgezogen werden (Fig. 4) oder auf dem Werkstückverbund verbleiben (Fig. 6). Fig. 1 shows two plate-shaped, superimposed workpieces 1 and 2 , which can be, for example, sheets or parts of hollow profiles to be joined together. Workpiece 2 must be fixed in position with respect to the rotating bolt by means of a counterforce. A rotating bolt ( 3 ) is moved against the surface of the workpiece 1 and, while maintaining its rotation, pressed firmly against both workpieces without it penetrating the workpiece 1 . Since high amounts of energy are released in a short time by rubbing, there are local temperature increases in the area of the joining zone ( 4 ). The micro-deformations on the surfaces associated with the temperature and pressure cause the passive layers lying in the region of the joining zone ( 4 ) to be broken up. The underlying high-energy active layers are bondable. The joining process now takes place under pressure and temperature, similar to the mechanism of pressure welding. The bolt can then either be withdrawn from workpiece 1 ( FIG. 4) or may remain on the workpiece assembly ( FIG. 6).

Für den Fall, daß der Bolzen als feste Einheit einer Schweißvorrichtung zurückgezogen wird (Fig. 4), sollte der Reibbolzen bevorzugt aus einem Werkstoff mit höherem Schmelzpunkt und guten Verschleißeigenschaften bestehen, da er einer permanenten Temperatur und Verschleißbeanspruchung unterliegt. Neben metallischen Werkstoffen kommen deshalb insbesondere auch keramische Werkstoffe in Frage.In the event that the bolt is withdrawn as a fixed unit of a welding device ( FIG. 4), the friction bolt should preferably consist of a material with a higher melting point and good wear properties, since it is subject to permanent temperature and wear stress. In addition to metallic materials, ceramic materials are therefore particularly suitable.

Wird der Bolzen (Fig. 5) als Teil des Verbundkörpers benutzt, muß man für eine lösbare Verbindung von der Antriebseinheit sorgen. Dies kann z. B. über Formschluß (z. B. Innensechskant) oder Kraftschluß (z. B. Spannzangen) erfolgen. Der Bolzen wird dabei wie beim herkömmlichen Reibschweißen an das Blech herangeführt, verrieben, abgestoppt und eventuell nachgedrückt (Fig. 5). Anschließend wird die Antriebseinheit (8) vom verschweißten Bolzen abgekoppelt und zurückgeführt (Fig. 6).If the bolt ( Fig. 5) is used as part of the composite body, you have to ensure a detachable connection from the drive unit. This can e.g. B. via positive locking (e.g. hexagon socket) or frictional locking (e.g. collets). As with conventional friction welding, the bolt is brought up to the sheet, rubbed, stopped and possibly pressed in ( Fig. 5). Then the drive unit ( 8 ) is uncoupled from the welded bolt and returned ( Fig. 6).

Da mit dem Schweißprozesses auch immer die Bildung eines Wulstes (5) verbunden ist, kann die Vorrichtung mit einer fräserartigen Wulstabdrehvorrichtung (6) (Fig. 7) ausgestattet werden. Diese kann fest mit dem Reibbolzen mitrotieren oder auch nachträglich an den Wulst herangeführt werden. Since the formation of a bead ( 5 ) is always associated with the welding process, the device can be equipped with a cutter-like bead turning device ( 6 ) ( FIG. 7). This can be rotated with the friction pin or can be brought up to the bead afterwards.

Ein weiterer Vorteil kann sein, das Werkstück 1 über einen Niederhalter (7) (Fig. 8) zu fixieren. Die Werkstücke 1 und 2 können dadurch nicht voneinander abheben, so daß vor allem im Bereich des Hauptwärmeeintrags am Umfang des Bolzens, die Werkstücke immer ausreichend stark gegeneinander gepreßt werden.Another advantage can be to fix the workpiece 1 using a hold-down device ( 7 ) ( FIG. 8). The workpieces 1 and 2 can not be lifted off from each other, so that the workpieces are always pressed sufficiently strongly against each other, especially in the area of the main heat input at the circumference of the bolt.

BezugszeichenlisteReference list

11

Werkstück workpiece

11

22nd

Werkstück workpiece

22nd

33rd

Bolzen
bolt

44th

Fügezone
Joining zone

55

Wulst
bead

66

Wulstabdrehvorrichtung
Bead turning device

77

Niederhalter
Hold-down

88th

Antriebseinheit
Drive unit

Claims (5)

1. Verfahren zur Herstellung von punktförmigen Schweißverbindungen mittels eines Reibbolzens, gekennzeichnet dadurch,
daß ein rotierender Bolzen (3), von der gegenüberliegenden Seite der Fügezone (4) liegend, in das eine der zu verbindenden Werkstücke eindringt ohne dieses zu durchstoßen (Fig. 1 bis 3),
daß im Bereich der Fügezone die Werkstücke durch den Druck des Bolzens und einer axialen Fixierung des gegenüberliegenden Werkstücks (2) fest gegeneinander gepreßt werden (Fig. 3),
die Reibung und der Druck im Bereich der Fügezone eine Temperaturerhöhung bewirkt,
der Bolzen (3) nach dem Schweißvorgang wieder zurückgezogen (Fig. 4) wird oder als Einheit auf dem Verbund verbleibt (Fig. 5 bis 6).1. A method for producing spot welds by means of a friction pin, characterized in that
that a rotating bolt ( 3 ), lying from the opposite side of the joining zone ( 4 ), penetrates into one of the workpieces to be connected without piercing it ( FIGS. 1 to 3),
that in the region of the joining zone the workpieces are pressed firmly against one another by the pressure of the bolt and an axial fixation of the opposite workpiece ( 2 ) ( FIG. 3),
the friction and pressure in the area of the joining zone causes an increase in temperature,
the bolt ( 3 ) is withdrawn again after the welding process ( FIG. 4) or remains as a unit on the assembly ( FIGS. 5 to 6). 2. Verfahren (Fig. 7 und 8) nach Anspruch 1, gekennzeichnet dadurch, daß beim Fügen mit verbleibendem Bolzen, die Antriebseinheit (8) kurz vor der Beendigung des Schweißvorgangs abgestoppt wird.2. The method ( Fig. 7 and 8) according to claim 1, characterized in that when joining with remaining bolts, the drive unit ( 8 ) is stopped shortly before the completion of the welding process. 3. Vorrichtung (Fig. 7) für das Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß eine Wulstabdrehvorrichtung (6) mit dem Bolzen gleichzeitig den entstehenden Wulst beseitigt.3. Device ( Fig. 7) for the method according to claim 1, characterized in that a bead turning device ( 6 ) with the bolt simultaneously eliminates the resulting bead. 4. Vorrichtung (Fig. 8) für das Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß ein Niederhalter (7) ein gegenseitiges abheben der Werkstücke voneinander verhindert.4. The device ( Fig. 8) for the method according to claim 1, characterized in that a holding-down device ( 7 ) prevents mutual lifting of the workpieces from one another. 5. Verfahren (Fig. 9) nach Anspruch 1, dadurch gekennzeichnet, daß mehrere Lagen von Werkstücken miteinander verbunden werden.5. The method ( Fig. 9) according to claim 1, characterized in that several layers of workpieces are connected to each other.
DE1997131638 1997-07-23 1997-07-23 Procedure for making frictional spot-welded joints using rubbing pin Withdrawn DE19731638A1 (en)

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Application Number Priority Date Filing Date Title
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Cited By (18)

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Publication number Priority date Publication date Assignee Title
DE19924252A1 (en) * 1999-05-27 2000-11-30 Controls Gmbh Deutsche Method and device for friction welding
WO2001036144A1 (en) * 1999-11-18 2001-05-25 Gkss-Forschungszentrum Geesthacht Gmbh Method and device for linking at least two adjoining work pieces by friction welding
WO2001062430A1 (en) * 2000-02-24 2001-08-30 Norsk Hydro Asa Method and apparatus for joining workpieces
WO2001083153A1 (en) * 2000-04-28 2001-11-08 Mazda Motor Corporation Method of processing metal members
EP1153694A2 (en) * 2000-05-08 2001-11-14 Kawasaki Jukogyo Kabushiki Kaisha Spot joining method and spot joining device
JP2003039183A (en) * 2001-07-25 2003-02-12 Hitachi Ltd Friction stir welding method and welded body
WO2003033198A1 (en) 2001-10-17 2003-04-24 Kawasaki Jukogyo Kabushiki Kaisha Frictional agitating connection device and robot with the device
US6601751B2 (en) * 2000-04-28 2003-08-05 Mazda Motor Corporation Method and apparatus for joining
EP1386688A1 (en) * 2002-07-31 2004-02-04 Mazda Motor Corporation Junction method and junction tool
EP1769877A1 (en) 2005-09-26 2007-04-04 Gkss-Forschungszentrum Geesthacht Gmbh Process and device for producing a weldment between the surfaces of two flat workpieces, with total running of the contacting surface of the friction stir tool into the surface of the second workpiece opposing the first workpiece
US7665650B2 (en) 2001-07-30 2010-02-23 Kawasaki Jukogyo Kabushiki Kaisha Friction stir joining method
DE102009059270A1 (en) * 2009-12-22 2011-06-30 EJOT GmbH & Co. KG, 57334 Reibschweißverbindung of at least two superimposed plate-shaped components
DE102010017550A1 (en) * 2010-06-23 2011-12-29 Ejot Gmbh & Co. Kg Connecting element for a friction-welded connection for connecting at least two plate-like components
CN101875154B (en) * 2009-11-23 2012-02-01 北京赛福斯特技术有限公司 Flowing friction welding method and tool thereof
DE102014218975A1 (en) * 2014-09-22 2016-03-24 Bayerische Motoren Werke Aktiengesellschaft Reibelementschweißverfahren
DE102015217460A1 (en) * 2015-09-11 2017-03-16 Volkswagen Aktiengesellschaft A method for joining a steel-containing component with an aluminum component
DE102006013529B4 (en) 2005-03-23 2019-01-31 Böllhoff Verbindungstechnik GmbH Method for joining workpieces
DE102011080252B4 (en) 2010-08-31 2020-01-02 Suzuki Motor Corp. METHOD FOR JOINING DIFFERENT METAL MATERIALS AND COMPOSITE PIECE MADE OF DIFFERENT METAL MATERIALS

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EP0653265A2 (en) * 1991-12-06 1995-05-17 The Welding Institute Improvements relating to friction welding
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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1057571A1 (en) * 1999-05-27 2000-12-06 Deutsche Controls GmbH Method and apparatus for friction welding
DE19924252A1 (en) * 1999-05-27 2000-11-30 Controls Gmbh Deutsche Method and device for friction welding
WO2001036144A1 (en) * 1999-11-18 2001-05-25 Gkss-Forschungszentrum Geesthacht Gmbh Method and device for linking at least two adjoining work pieces by friction welding
DE19955737A1 (en) * 1999-11-18 2001-06-13 Geesthacht Gkss Forschung Method and device for connecting at least two adjacent workpieces according to the method of friction stir welding
DE19955737B4 (en) * 1999-11-18 2005-11-10 Gkss-Forschungszentrum Geesthacht Gmbh Method and device for connecting at least two adjoining workpieces by the method of friction stir welding
WO2001062430A1 (en) * 2000-02-24 2001-08-30 Norsk Hydro Asa Method and apparatus for joining workpieces
US6601751B2 (en) * 2000-04-28 2003-08-05 Mazda Motor Corporation Method and apparatus for joining
WO2001083153A1 (en) * 2000-04-28 2001-11-08 Mazda Motor Corporation Method of processing metal members
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EP1153694A3 (en) * 2000-05-08 2002-06-19 Kawasaki Jukogyo Kabushiki Kaisha Spot joining method and spot joining device
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