DE202015001188U1 - Welding jaws (clamping system) for closed TIG orbital welding heads with integrated heat shield and guide system for the upper jaw pair and active gas cooling - Google Patents

Welding jaws (clamping system) for closed TIG orbital welding heads with integrated heat shield and guide system for the upper jaw pair and active gas cooling Download PDF

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Publication number
DE202015001188U1
DE202015001188U1 DE201520001188 DE202015001188U DE202015001188U1 DE 202015001188 U1 DE202015001188 U1 DE 202015001188U1 DE 201520001188 DE201520001188 DE 201520001188 DE 202015001188 U DE202015001188 U DE 202015001188U DE 202015001188 U1 DE202015001188 U1 DE 202015001188U1
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welding
jaws
welding head
jaw
formations
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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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • 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
    • B23K37/027—Carriages for supporting the welding or cutting element for making circular cuts or welds
    • 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
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
    • B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
    • B23K9/0286—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode moving around the fixed tube during the welding operation
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories
    • 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
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

Schweißbacken (Spannsystem) für WIG-Orbitalschweißköpfe zur Fixierung und Zentrierung von zwei Rohrenden (Fügepartnern), die aus vier Teilen gefertigt sind (ein Satz = vier Teile) und in den passenden Schweißkopf (Systembindung) mittels einer Schraubverbindung und/oder Klemmverbindung befestigt werden, dadurch gekennzeichnet, dass die Backenhälften Ausformungen (1) zur Schweißkopfmitte hin entlang eines oder mehrerer fester Radien aufweist. Diese Ausformungen bewirken die Abschirmung des restlichen Schweißkopfsystems und fungieren somit als Hitzeschild.Welding jaws (clamping system) for TIG orbital welding heads for fixing and centering two pipe ends (joining partners), which are made of four parts (one set = four parts) and fixed in the appropriate welding head (system binding) by means of a screw connection and / or clamp connection, characterized in that the jaw halves have formations (1) towards the welding head center along one or more fixed radii. These formations shield the rest of the welding head system and thus act as a heat shield.

Description

Beschreibung Stand der TechnikDescription of the prior art

Das Wolfram-Inertgas-Orbital-Schweißverfahren gehört zu den etablierten Fügeverfahren zum Verbinden rotationssymmetrischer Fügepartner (z. B. Rohrenden). Eine Unterart bildet das WIG-Orbitalschweißen mit geschlossenen Köpfen ohne Zusatzmaterial. Die Rohrenden werden hierbei, mit im Schweißkopf montierten Spannbacken, in vorher definierter Position gespannt. Üblicherweise kommen zwei Backenhälften pro Rohrende zum Einsatz. Die Spannbacken bilden dabei eine Funktionseinheit aus Positionier-/Spannvorrichtung, optischen Schutzschirm, Schutzschirm gegen umgebende Atmosphäre (Inertgas in der Lichtbogenkammer zwischen den Spannbacken) und elektrischem Leiter (geschlossener Stromkreislauf für elektrische Schweißverfahren notwendig). Diese Funktionseinheit wird im Zusammenhang mit oben genannten Fügeverfahren Schweißbacke genannt. Konstruktionsbedingt führt die Kapselung zu einem Wärmestau innerhalb der Lichtbogenkammer. Zudem muss für eine platzeffiziente Bauweiße das Spannen der Rohrenden möglichst dicht an der Fügezone erfolgen. Hieraus resultiert eine weitere thermische Belastung des Schweißkopfes. Durch die Nähe zur Fügezone kommt es zu einer deutlichen Erwärmung der Kontaktfläche Rohr-Schweißbacke.The tungsten inert gas orbital welding process is one of the established joining methods for connecting rotationally symmetrical joining partners (eg tube ends). A subspecies forms the TIG orbital welding with closed heads without additional material. The pipe ends are clamped in a predefined position with clamping jaws mounted in the welding head. Usually, two jaw halves are used per pipe end. The clamping jaws thereby form a functional unit of positioning / tensioning device, optical protective shield, protective shield against surrounding atmosphere (inert gas in the arc chamber between the clamping jaws) and electrical conductor (closed circuit for electrical welding necessary). This functional unit is called in connection with the above-mentioned joining method welding jaw. Due to the design, the encapsulation leads to a build-up of heat within the arc chamber. In addition, for a space-efficient construction white the clamping of the pipe ends must be as close as possible to the joint zone. This results in a further thermal stress on the welding head. Due to the proximity to the joining zone, there is a significant heating of the contact surface tube welding jaw.

Da die üblichen Materialien zur Realisierung der Funktionseinheit, wie CrNi-Stahl-Legierungen, Aluminium-Legierungen, Nickel-Kupfer-Legierung, neben einer guten elektrischen auch eine gute bis sehr gute Wärmeleitfähigkeit besitzen, kommt es zu einer starken thermischen Belastung des Gehäusematerials des Schweißkopfes.Since the usual materials for the realization of the functional unit, such as CrNi-steel alloys, aluminum alloys, nickel-copper alloy, in addition to a good electrical and good to very good thermal conductivity, there is a strong thermal load on the housing material of the welding head ,

Beschreibung der ErfindungDescription of the invention

Die Erfindung betrifft einen Teil einer Vorrichtung zum Fixieren und Zentrieren von zwei Rohrenden zueinander, um sie mittels eines Lichtbogenschweißverfahren mit nicht abschmelzender Elektrode zu verbinden. Die Erfindung ermöglicht bei diesem etablierten Verfahren die Erweiterung des Funktionsumfanges der Schweißbacken, um die Eigenschaft einer Abschirmung des Schweißkopfgrundkörpers (meist eines Kunststoffgehäuses) gegenüber der Wärmeabstrahlung des Fügeprozesses. Zusätzlich ermöglicht die Ausformung geeigneter Hohlräume eine aktive Gaskühlung der Schweißbacken. Die genannten Vorteile werden dabei sowohl durch werkstofftechnische, als auch konstruktive Ansätze gelöst.The invention relates to a part of a device for fixing and centering two tube ends to each other in order to connect them with a non-consumable electrode by means of an arc welding method. The invention allows in this established method, the extension of the functional scope of the welding jaws to the property of shielding the welding head body (usually a plastic housing) against the heat radiation of the joining process. In addition, the formation of suitable cavities allows active gas cooling of the welding jaws. The advantages mentioned are achieved both by material technology, as well as constructive approaches.

Claims (6)

Schweißbacken (Spannsystem) für WIG-Orbitalschweißköpfe zur Fixierung und Zentrierung von zwei Rohrenden (Fügepartnern), die aus vier Teilen gefertigt sind (ein Satz = vier Teile) und in den passenden Schweißkopf (Systembindung) mittels einer Schraubverbindung und/oder Klemmverbindung befestigt werden, dadurch gekennzeichnet, dass die Backenhälften Ausformungen (1) zur Schweißkopfmitte hin entlang eines oder mehrerer fester Radien aufweist. Diese Ausformungen bewirken die Abschirmung des restlichen Schweißkopfsystems und fungieren somit als Hitzeschild.Welding jaws (clamping system) for TIG orbital welding heads for fixing and centering two pipe ends (joining partners), which are made of four parts (one set = four parts) and fixed in the appropriate welding head (system binding) by means of a screw connection and / or clamp connection, characterized in that the jaw halves formations ( 1 ) to the welding head center along one or more fixed radii. These formations shield the rest of the welding head system and thus act as a heat shield. Schweißbacken nach Anspruch 1, dadurch gekennzeichnet, dass die Wärmeleitfähigkeit um bis zu einem Drittel geringer ist, durch die Verwendung eines additiven Fertigungsverfahrens, als bei der Verwendung einer der oben genannten Legierungen, die durch spanende Verfahren bearbeitet wurden. Die Wärmeleitfähigkeit wird zusätzlich durch in den Backenkörper eingebrachte Hohlräume und Vertiefungen reduziert, da durch die Reduzierung des Materialquerschnittes eine Erhöhung des Wärmeleitwiderstandes erzielt wird. Die Verwendung von additiven Fertigungsverfahren macht dabei die Einarbeitung von Geometrien möglich, die nicht durch konventionelle Fertigungsverfahren erzielt werden.Welding jaw according to claim 1, characterized in that the thermal conductivity is lower by up to a third, by the use of an additive manufacturing method, than in the use of one of the above alloys, which have been processed by machining processes. The thermal conductivity is additionally reduced by introduced into the jaw body cavities and depressions, since an increase in the thermal resistance is achieved by reducing the material cross-section. The use of additive manufacturing techniques makes it possible to incorporate geometries that are not achieved by conventional manufacturing processes. Schweißbacken nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die durch den additiven Fertigungsprozess erzeugten Hohlräume (2) für eine aktive Gaskühlung der Schweißbacken genutzt werden kann. Dies ermöglicht einen teilweisen Verzicht auf die häufig verwendete im Schweißkopf integrierte Wasserkühlung.Welding jaw according to one of the preceding claims, characterized in that the cavities () produced by the additive manufacturing process ( 2 ) can be used for active gas cooling of the welding jaws. This allows a partial waiver of the commonly used in the welding head integrated water cooling. Schweißbacken nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wärmeleitfähigkeit der Ausformungen an den Schweißbacken durch eine keramische Beschichtung oder durch ebenfalls mittels additive Fertigungsverfahren hergestellter Inlays (Einleger) reduziert wird.Welding jaws according to one of the preceding claims, characterized in that the thermal conductivity of the formations on the welding jaws is reduced by a ceramic coating or by inlays (inserts) likewise produced by means of additive manufacturing methods. Schweißbacken nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die keramische Beschichtung (3) oder die verwendeten Inlays die elektrische Leitfähigkeit so weit reduzieren, dass ein Kurzschluss, also das zünden des Lichtbogens zwischen Elektrode (WIG-Elektrode) und Ausformung, verhindert wird.Welding jaw according to one of the preceding claims, characterized in that the ceramic coating ( 3 ) or the inlays used reduce the electrical conductivity so far that a short circuit, ie the ignition of the arc between the electrode (TIG electrode) and shaping, is prevented. Schweißbacken nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das obere Backenpaar (bei senkrechter Ausrichtung des geschlossenen Schweißkopfes bei Waagerecht positionierten Rohrenden) nicht fest mit dem Schweißkopf verbunden sind, sondern über ein Führungs- und Spannsystem (4) mit der jeweiligen unteren Backenhälfte verbunden sind.Welding jaws according to one of the preceding claims, characterized in that the upper pair of jaws (in the case of vertical alignment of the closed welding head with pipe positions positioned horizontally) are not fixedly connected to the welding head, but via a guide and Tensioning system ( 4 ) are connected to the respective lower jaw half.
DE201520001188 2015-02-14 2015-02-14 Welding jaws (clamping system) for closed TIG orbital welding heads with integrated heat shield and guide system for the upper jaw pair and active gas cooling Expired - Lifetime DE202015001188U1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020156599A1 (en) * 2019-01-31 2020-08-06 Orbitalservice Gmbh Device for welding, use of a device, an insulating means body, and a production method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020156599A1 (en) * 2019-01-31 2020-08-06 Orbitalservice Gmbh Device for welding, use of a device, an insulating means body, and a production method

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Effective date: 20150416

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