DE3911851C1 - Metallurgical connection between heating conductor and cable - using intermediate piece of large cross-section and low resistance - Google Patents
Metallurgical connection between heating conductor and cable - using intermediate piece of large cross-section and low resistanceInfo
- Publication number
- DE3911851C1 DE3911851C1 DE19893911851 DE3911851A DE3911851C1 DE 3911851 C1 DE3911851 C1 DE 3911851C1 DE 19893911851 DE19893911851 DE 19893911851 DE 3911851 A DE3911851 A DE 3911851A DE 3911851 C1 DE3911851 C1 DE 3911851C1
- Authority
- DE
- Germany
- Prior art keywords
- intermediate piece
- cable
- connection
- heating conductor
- conductor
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
-
- 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
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
- H01R4/58—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 characterised by the form or material of the contacting members
- H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren und Vorrichtungen zur metallurgischen Verbindung eines durch hohe Temperaturen belastbaren Heizleiters mit einem kaltbleibenden Kabel, insbesondere aus Kupfer, über ein Zwischenstück aus einem dritten Material. Die Verbindungsstellen zwischen einem im Betrieb sehr heißen Heizleiter und einen kaltbleibenden Kabel stellen ein Problem dar, beispielsweise bei der Beheizung von elektromagnetischen Flüssigmetallpumpen zum Fördern oder Dosieren von Aluminium und anderen Metallen. Die als Heizleiter verwendeten hoch-aluminiumhaltigen Stahlwerkstoffe durch thermisches Fügen zu verbinden, ist sehr schwierig, da sie insbesondere in dünnwandigen Abmessungen zu starker Rißbildung und Sprödbruch neigen. Die bisherige Verbindung vom Heizleiter zum Zwischenstück mittels einer Silberlotverbindung fällt nach unterschiedlich langen Betriebszeiten durch heißkorrosive Unterbrechung des Heizleiters aus, und ist am Einbauort nur mühsam zu reparieren.The present invention relates to a method and Devices for the metallurgical connection of a high Temperatures resilient heating conductor with a cold Cable, in particular made of copper, via an intermediate piece a third material. The connection points between one very hot heating conductor during operation and a cold one Cables are a problem, for example when heating of electromagnetic liquid metal pumps for pumping or Dosing of aluminum and other metals. The as a heating conductor used high aluminum-containing steel materials Connecting thermal joining is very difficult as it especially in thin-walled dimensions to severe cracking and tend to break. The previous connection from the heating conductor falls to the intermediate piece by means of a silver solder connection operating times of different lengths due to hot corrosive Interruption of the heating conductor, and is only at the installation site tedious to repair.
Aufgabe der vorliegenden Erfindung ist ein Verfahren und dazu geeignete Vorrichtungen zur metallurgischen Verbindung eines durch hohe Temperaturen belastbaren Heizleiters mit einem kaltbleibenden Kabel, insbesondere aus Kupfer, über ein Zwischenstück aus temperaturbeständigem Material von größerem Querschnitt und dementsprechend geringerem elektrischen Widerstand als der Heizleiter. Die nach diesem Verfahren hergestellte Verbindung soll auch nach längerer Betriebszeit unter erschwerten Bedingungen beständig bleiben. Weiterhin ist es Aufgabe der vorliegenden Erfindung, auch eine geeignete Haltevorrichtung zur Durchführung des Verfahrens zu schaffen. The object of the present invention is a method and suitable devices for the metallurgical connection of a heating conductor with a high temperature resistance cables that remain cold, in particular made of copper, over a Intermediate piece made of temperature-resistant material of larger size Cross section and accordingly lower electrical Resistance than the heating conductor. The following this procedure Established connection should also after a long period of operation remain stable under difficult conditions. Furthermore is it is an object of the present invention to find a suitable one To create a holding device for performing the method.
Zur Lösung dieser Aufgaben wird ein Verfahren nach dem 1. Anspruch, eine Verbindung nach dem 2. und 3. Anspruch und eine Haltevorrichtung nach dem 4. Anspruch vorgeschlagen. Mit dem Zwischenstück von größerem Querschnitt und entsprechend geringerem Widerstand als der Heizleiter wird zunächst erreicht, daß dieses Zwischenstück bei etwas Abstand von der Verbindungsstelle keine hohen Temperaturen mehr aufweist. Dadurch wird sowohl die angrenzende Isolierung als auch das anschließende Kupferkabel vor Schädigung bzw. Korrosion bewahrt. Mit der Ausführung des erfindungsgemäßen Verfahrens in einer an Draht bzw. Kabel angepreßten Haltevorrichtung aus einem gut wärmeleitenden Material unter Inertgas wird einerseits eine Korrosion während des Schweißens vermieden und andererseits die beim Schweißen unvermeidlich auftretende Gefügeveränderung auf die Schweißverbindung begrenzt. Da die Schweißverbindung gegenüber den zu verbindenden Drähten oder Kabeln erheblich verdickt ist, ist eine durch Gefügeveränderung bedingte Schwächung ihrer Festigkeit an dieser Stelle nicht mehr von Bedeutung.A method according to the 1st Claim, a connection according to the 2nd and 3rd claim and one Holding device proposed according to the 4th claim. With the Intermediate piece of larger cross section and accordingly lower resistance than the heating conductor is initially achieved that this intermediate piece at some distance from the Connection point no longer has high temperatures. This will both the adjacent insulation and that subsequent copper cables from damage or corrosion preserved. With the execution of the inventive method in a holding device pressed onto wire or cable a good heat-conducting material under inert gas on the one hand prevents corrosion during welding and on the other hand, the one that occurs inevitably during welding Structural change limited to the welded joint. Since the Welded connection to the wires to be connected or Cables is significantly thickened due to structural changes not weaken their strength at this point more important.
Im 2. Anspruch werden für Heizleiter und Zwischenstück geeignete Materialien vorgeschlagen.In the 2nd claim are for heat conductor and intermediate piece suitable materials suggested.
Nach dem 3. Anspruch ist es besonders zweckmäßig, das Zwischenstück aus mehreren insbesondere seilartig verdrillten Drähten herzustellen. Damit werden die Berührungsflächen zwischen den beiden zu verbindenden Teilen größer und die beim Schweißen und danach in einem massiven Zwischenstück auftretenden Spannungen weitgehend vermieden.According to the 3rd claim, it is particularly useful that Intermediate piece of several twisted in particular rope-like To manufacture wires. So that the contact surfaces between the two parts to be connected larger and the Welding and then in a massive intermediate piece occurring voltages largely avoided.
Die im 4. Anspruch vorgeschlagene Haltevorrichtung fixiert während des Schweißens die beiden zu verschweißenden Enden und schützt sie vor dem Luftsauerstoff. Der für die spätere Verbindungsstelle vorgesehene Hohlraum verhindert ein Abfließen des schmelzflüssigen Materials und formt die Verbindungsstelle.The holding device proposed in claim 4 fixed during welding the two ends to be welded and protects them from atmospheric oxygen. The one for the later Connection provided cavity prevents drainage of the molten material and forms the connection point.
Die Fig. 1 bis 3 zeigen Ausführungsbeispiele der Erfindung. Figs. 1 to 3 show embodiments of the invention.
Fig. 1 zeigt eine metallurgische Verbindung des Heizleiters 1 über eine olivenförmige Verbindungsstelle 2 zu einem verdrillten Zwischenstück 3 und über eine weitere olivenförmige Verbindungsstelle 4 zum Kupferkabel 5. Fig. 1 shows a metallurgical bonding of the heat conductor 1 via an olive-shaped joint 2 to a twisted intermediate piece 3 and through a further olive-shaped connection point 4 to the copper cable 5.
In den Fig. 2 und 3 ist eine Haltevorrichtung aus Kupfer dargestellt aus einem Oberteil 6 und einem Unterteil 7 mit etwas Abstand dazwischen um die zu verbindenden Drähte bzw. Kabel einlegen zu können. Beide Teile 6 und 7 werden nach Einlegen der zu verbindenden Drähte 1 und 3 oder Kabel 5 in geeigneter Weise zusammengepreßt und durch eine Öffnung 8 mit einem Wolfram-Inert-Gas-Brenner verschweißt. Dargestellt ist nur eine Haltevorrichtung für die Verbindungsstelle 2, die den Durchmessern von Heizleiter 1 und Zwischenstück 3 angepaßt ist. Zum Schweißen der Verbindung 4 ist eine weitere Haltevorrich tung notwendig, die den Durchmessern von Zwischenstück 3 und Kupferkabel 5 entspricht. Vermutlich bewirkt diese Haltevorrichtung aus einem gut wärmeleitenden Material nicht nur, daß die zu verbindenden Teile vor dem Luftsauerstoff geschützt werden, sondern auch, daß eine langsame und für die Ausbildung des Gefüges zweckmäßige Abkühlung erreicht wird. Jedenfalls haben sich die damit hergestellten Verbindungen auch nach längerer Betriebszeit als haltbar erwiesen.In FIGS. 2 and 3, a holding device is made of copper shown of an upper part 6 and to be able to insert between a lower part 7 with some clearance around the wires to be connected or cable. Both parts 6 and 7 are pressed together in a suitable manner after insertion of the wires 1 and 3 or cable 5 to be connected and welded through an opening 8 to a tungsten inert gas burner. Only a holding device for the connection point 2 is shown , which is adapted to the diameters of the heating conductor 1 and the intermediate piece 3 . For welding the connection 4 a further Haltvorrich device is necessary, which corresponds to the diameters of the intermediate piece 3 and 5 copper cable. Presumably, this holding device made of a good heat-conducting material not only protects the parts to be connected from the atmospheric oxygen, but also that slow cooling, which is expedient for the formation of the structure, is achieved. In any case, the connections made with them have proven to be durable even after a long period of operation.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893911851 DE3911851C1 (en) | 1989-04-11 | 1989-04-11 | Metallurgical connection between heating conductor and cable - using intermediate piece of large cross-section and low resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893911851 DE3911851C1 (en) | 1989-04-11 | 1989-04-11 | Metallurgical connection between heating conductor and cable - using intermediate piece of large cross-section and low resistance |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3911851C1 true DE3911851C1 (en) | 1990-06-21 |
Family
ID=6378424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19893911851 Expired - Fee Related DE3911851C1 (en) | 1989-04-11 | 1989-04-11 | Metallurgical connection between heating conductor and cable - using intermediate piece of large cross-section and low resistance |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3911851C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0743206A2 (en) * | 1995-05-16 | 1996-11-20 | Urs Dolder | Heating device for heating media surrounding the device |
-
1989
- 1989-04-11 DE DE19893911851 patent/DE3911851C1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
NICHTS ERMITTELT * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0743206A2 (en) * | 1995-05-16 | 1996-11-20 | Urs Dolder | Heating device for heating media surrounding the device |
EP0743206A3 (en) * | 1995-05-16 | 1998-01-21 | Urs Dolder | Heating device for heating media surrounding the device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: SIEMENS AG, 8000 MUENCHEN, DE |
|
8339 | Ceased/non-payment of the annual fee |