EP0050092B1 - Method for the butt welding of high current conductors of large cross section area - Google Patents
Method for the butt welding of high current conductors of large cross section area Download PDFInfo
- Publication number
- EP0050092B1 EP0050092B1 EP19810730100 EP81730100A EP0050092B1 EP 0050092 B1 EP0050092 B1 EP 0050092B1 EP 19810730100 EP19810730100 EP 19810730100 EP 81730100 A EP81730100 A EP 81730100A EP 0050092 B1 EP0050092 B1 EP 0050092B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- welding
- large cross
- butt welding
- current conductors
- high current
- 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.)
- Expired
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
Definitions
- the invention relates to a method for the butt welding of heavy current conductors with a large cross section, in particular with the aid of double pressure welding.
- the invention is therefore based on the object of specifying a method which makes it possible to weld even heavy current conductors of very large cross sections without investments which are no longer economically viable.
- the invention relates both to heavy current solid conductors and to multi-wire heavy current conductors.
- each conductor end shows two partially cut conductor ends 11 before welding.
- the holes in each conductor end are designated by 12, the depths of which are dimensioned such that they are somewhat larger than half the compression path that occurs during welding.
- FIG. 2 the now connected conductor ends are shown. The comparison with FIG. 2 clearly shows a reduction in the drilling depth after upsetting. With 13 the weld burr forming within the bore is designated. Such a welding ridge naturally also forms on the outside, but is automatically sheared off there after welding.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zum stumpfen Verschweißen von Starkstromleitern mit großem Querschnitt, insbesondere mit Hilfe des Doppeldruckschweißens.The invention relates to a method for the butt welding of heavy current conductors with a large cross section, in particular with the aid of double pressure welding.
Die Fertigung von elektrischen Leitungen oder Kabeln tendiert in immer stärkerem Maße zum durchgehenden Fertigungsablauf, d. h. daß mehrere Fertigungsschritte vollzogen werden. Diese sehr rationelle Methode bringt es mit sich, daß die elektrischen Leiter aufeinanderfolgender Lose stumpf miteinander verschweißt werden müssen. Dabei ist an die Verbindungsstellen bei dem derzeitigen Fertigungsbetrieb lediglich die Forderung zu stellen, daß sie allein den Belastungen (Zug) während des Herstellungsprozesses gewachsen sein muß, weil derartige Verbindungen mit wenigen Ausnahmen vor der Auslieferung der Leitung oder des Kabels herausgeschnitten werden.The production of electrical lines or cables tends to an ever increasing degree to the continuous production process, i. H. that several manufacturing steps are carried out. This very rational method means that the electrical conductors of successive lots have to be butt-welded together. The only requirement to be made at the connection points in the current production plant is that it must be able to withstand the loads (train) during the production process because, with a few exceptions, such connections are cut out before the line or cable is delivered.
Um Leiterseile miteinander zu verschweißen, wendet man bisher die Widerstandsstumpfschweißung unter Verwendung von Keramikhülsen an. Die definiert gesägten Leiterseilenden werden auf Stoß in eine Keramikhülse geschoben, deren Durchmesser zum Leiterseildurchmesser nur sehr kleine Abweichungen aufweisen darf. Nach Ablauf der Schweißung, die zu einem gegossenen Gefügecharakter führt, muß die Keramikhülse zerschlagen werden. Eine Nachbearbeitung der Schweißstelle ist in vielen Fällen notwendig.So far, resistance butt welding using ceramic sleeves has been used to weld conductor cables together. The defined sawn ends of the cable are pushed into a ceramic sleeve, the diameter of which may differ only very slightly from the diameter of the cable. After the welding process, which leads to a cast structure, the ceramic sleeve must be broken. A reworking of the welding point is necessary in many cases.
Aus der DE-A-1 615 378 ist ein Verfahren bekannt zum Preßstumpfschweißen von in direktem Stromdurchgang erwärmten Stahlrohren, bei welchem Verfahren die Aufgabe gelöst wurde, eine gute Schweißverbindung bei gleichzeitiger Vermeidung von zu großen Querschnittsverengungen zu erzielen.From DE-A-1 615 378 a method is known for butt welding of steel tubes heated in direct current passage, in which method the object was achieved to achieve a good welded connection while avoiding excessive cross-sectional constrictions.
In jüngster Zeit ist eine Verbindungstechnik bekanntgeworden, die speziell für Massivleiter gedacht ist, das sogenannte Doppeldruck-Widerstandsstumpfschweißen (Firmenprospekt IDEAL DDS 2/74). Der Unterschied zum konventionellen Verfahren besteht darin, daß keine Keramikhülsen notwendig sind und Oxideinschlüsse durch den mit hohem Druck wirksamen Nachstauchvorgang in die erstarrende Phase der Schweißung zerstört werden und dieser Vorgang der Kaltstauchung eine Gefügeverfestigung zur Folge hat.Recently, a connection technology has become known that is specifically intended for solid conductors, the so-called double-pressure resistance butt welding (company brochure IDEAL DDS 2/74). The difference to the conventional process is that no ceramic sleeves are necessary and oxide inclusions are destroyed by the high-pressure post-upsetting process in the solidifying phase of the weld, and this process of cold upsetting results in a structural hardening.
Die Schweißung von Starkstromleitern stößt bei größeren Querschnitten wegen der erforderlichen großen Ströme auf Schwierigkeiten. Aus wirtschaftlichen Überlegungen stehen im allgemeinen nur Schweißvorrichtungen zur Verfügung, deren Schweißströme bei großen Querschnitten nicht ausreichen. Dabei werden unter »große« Querschnitte solche ab 500 mm2 bei Kupferleitern verstanden (bei Aluminiumleitern liegt der Wert entsprechend dem höheren spezifischen Widerstand etwas höher). Für Querschnitte bis zu der genannten Größe sind Schweißleistungen bis zu 220 kVA erforderlich. Noch größere Querschnitte und damit auch höhere Leistungen steigern bei entsprechenden Schweißgeräten den Investitionsaufwand in so starkem Maße, das aus wirtschaftlichen Überlegungen heraus Maschinen dieser Größe auf dem Markt nicht zur Verfügung stehen.The welding of high-voltage conductors encounters difficulties with larger cross-sections due to the large currents required. For economic reasons, only welding devices are generally available whose welding currents are insufficient for large cross sections. “Large” cross-sections are understood to mean those from 500 mm 2 for copper conductors (for aluminum conductors, the value is somewhat higher in accordance with the higher specific resistance). Welding capacities of up to 220 kVA are required for cross sections up to the size specified. Even larger cross-sections and thus also higher outputs increase the investment in such welding machines to such an extent that, for economic reasons, machines of this size are not available on the market.
Daher liegt der Erfindung die Aufgabe zugrunde, ein Verfahren anzugeben, das es ermöglicht, ohne wirtschaftlich nicht mehr vertretbare Investitionen auch Starkstromleiter sehr großer Querschnitte schweißen zu können.The invention is therefore based on the object of specifying a method which makes it possible to weld even heavy current conductors of very large cross sections without investments which are no longer economically viable.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die zu verschweißenden Leiter je an ihrer Stirnseite mit einer zentralen Bohrung versehen werden.This object is achieved according to the invention in that the conductors to be welded are each provided with a central bore on their end face.
Mit dieser überraschend einfachen Maßnahme wird erreicht, daß der Querschnitt und damit der erforderliche Schweißstrom auf einen bestimmten maximalen Querschnitt bzw. Strom beschränkt werden kann. Die Bohrungen in den beiden zu verbindenden Leiterenden müssen nur so ausgeführt werden, daß die Tiefe etwas größer ist als der halbe Stauch- oder Schweißweg, damit der auch innerhalb der Bohrungen entstehende Schweißgrat die Schweißverbindung selbst nicht beeinträchtigen kann.This surprisingly simple measure ensures that the cross section and thus the required welding current can be limited to a specific maximum cross section or current. The holes in the two conductor ends to be connected only need to be made so that the depth is slightly greater than half the compression or welding path, so that the weld burr that also arises within the holes cannot impair the welded connection itself.
Mit Hilfe dieses Verfahrens kann man auch die im Laufe einer Fertigung gelegentlich anfallenden extremen Querschnitte beherrschen. Eine derartige Verbindung ist auf jeden Fall genügend zugfest, um den während des Fertigungsprozesses anfallenden Belastungen gewachsen zu sein.With the help of this process, one can also master the extreme cross sections that occasionally occur during production. In any case, such a connection is sufficiently tensile to withstand the loads that arise during the manufacturing process.
Selbstverständlich bezieht sich die Erfindung sowohl auf Starkstrommassivleiter als auch auf mehrdrähtige Starkstromleiter.Of course, the invention relates both to heavy current solid conductors and to multi-wire heavy current conductors.
Das Verfahren nach der Erfindung wird anhand des in der Zeichnung dargestellten und nachstehend beschriebenen Ausführungsbeispiele im einzelnen erläutert.The method according to the invention is explained in detail using the exemplary embodiments shown in the drawing and described below.
Dabei zeigt Fig. 1 zwei teilweise geschnittene Leiterenden 11 vor dem Verschweißen. Mit 12 sind dabei die Bohrungen in jedem Leiterende bezeichnet, deren Tiefen so bemessen sind, daß sie etwas größer als der halbe Stauchweg sind, der beim Verschweißen auftritt.1 shows two partially cut
In Fig. 2 sind die nunmehr miteinanderverbundenen Leiterenden dargestellt. Der Vergleich mit Fig. 2 läßt Verkürzung der Bohrtiefe nach dem Stauchen deutlich erkennen. Mit 13 ist der innerhalb der Bohrung sich bildende Schweißgrat bezeichnet. Ein solcher Schweißgrat bildet sich natürlich auch an der Außenseite, wird dort aber nach dem Schweißen automatisch abgeschert.In Fig. 2 the now connected conductor ends are shown. The comparison with FIG. 2 clearly shows a reduction in the drilling depth after upsetting. With 13 the weld burr forming within the bore is designated. Such a welding ridge naturally also forms on the outside, but is automatically sheared off there after welding.
Claims (1)
- A process for butt-welding heavy current conductors having a large cross-section, in particular with the aid of double pressure welding, characterised in that each of the conductor ends (11) to be welded is provided with a central bore (12) at its end face.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803039175 DE3039175C2 (en) | 1980-10-14 | 1980-10-14 | Process for butt welding of power conductors with large cross-sections |
DE3039175 | 1980-10-14 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0050092A2 EP0050092A2 (en) | 1982-04-21 |
EP0050092A3 EP0050092A3 (en) | 1982-12-08 |
EP0050092B1 true EP0050092B1 (en) | 1985-03-27 |
Family
ID=6114555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810730100 Expired EP0050092B1 (en) | 1980-10-14 | 1981-09-23 | Method for the butt welding of high current conductors of large cross section area |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0050092B1 (en) |
DE (1) | DE3039175C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7265751B2 (en) * | 2019-02-19 | 2023-04-27 | 株式会社アスター | Method for manufacturing busbar joint |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1615378A1 (en) * | 1967-01-05 | 1970-05-27 | Siemens Ag | Process for pressure butt welding of steel pipes heated in direct current flow |
DE2647338A1 (en) * | 1976-10-18 | 1978-04-20 | Siemens Ag | Electric resistance butt welding of wound electric cables - without using a ceramic bush round the joint during welding |
US4151392A (en) * | 1977-03-14 | 1979-04-24 | Teledyne Industries, Inc. | Method of manufacturing electrical connector |
-
1980
- 1980-10-14 DE DE19803039175 patent/DE3039175C2/en not_active Expired
-
1981
- 1981-09-23 EP EP19810730100 patent/EP0050092B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3039175C2 (en) | 1985-03-07 |
EP0050092A3 (en) | 1982-12-08 |
DE3039175A1 (en) | 1982-05-13 |
EP0050092A2 (en) | 1982-04-21 |
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