EP0006982B1 - Connection of a wire conductor to a terminal and method for manufacturing such a connection - Google Patents

Connection of a wire conductor to a terminal and method for manufacturing such a connection Download PDF

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Publication number
EP0006982B1
EP0006982B1 EP79101358A EP79101358A EP0006982B1 EP 0006982 B1 EP0006982 B1 EP 0006982B1 EP 79101358 A EP79101358 A EP 79101358A EP 79101358 A EP79101358 A EP 79101358A EP 0006982 B1 EP0006982 B1 EP 0006982B1
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EP
European Patent Office
Prior art keywords
bore
conductor wire
connection
section
terminal member
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
Application number
EP79101358A
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German (de)
French (fr)
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EP0006982A1 (en
Inventor
Günter Schulze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
LGZ Landis and Gyr Zug AG
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Publication date
Application filed by LGZ Landis and Gyr Zug AG filed Critical LGZ Landis and Gyr Zug AG
Priority to AT79101358T priority Critical patent/ATE1124T1/en
Publication of EP0006982A1 publication Critical patent/EP0006982A1/en
Application granted granted Critical
Publication of EP0006982B1 publication Critical patent/EP0006982B1/en
Expired legal-status Critical Current

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    • 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation

Definitions

  • the invention relates to a connection of a conductor wire to a terminal piece and to a method for producing such connections according to the preambles of claims 1 and 2.
  • the invention has for its object to provide a simple connection that is equivalent to a soldered connection.
  • a terminal piece 1 has a continuous bore 2 for receiving a conductor wire 3 to be connected to the terminal piece 1.
  • This can be the end of any electrical conductor.
  • the type of connection described below is used in electricity meters to connect their current coils, consisting of a conductor wire 3 with a rectangular cross section, to the terminal piece 1.
  • the conductor ends are to be rectangular, at least over the length serving for the connection, for example by squeezing.
  • the bore 2 has the same diameter over its entire length, while in the sectional drawings of FIGS. 2 to 5 the bore 2 merges into a bore 4 of larger diameter outside of a length L (FIG. 2) claimed for the connection with the conductor piece .
  • the larger hole 4 serves for the connection of one or more wires, which can be clamped by means of two threaded holes 5 (FIG. 2) in the clamping piece 1 by screws, not shown, while in the smaller hole 2 in the finished connection the conductor wire 3 corresponds to the figure 1, is compressed like a leporello stack.
  • clamping jaws 11 (FIG. 2) during the upsetting process. These press the clamp piece 1 together and counteract the transverse forces generated during the squeezing process, so that only small internal stresses remain in the clamp piece 1 of the finished connection. This is important to avoid stress corrosion cracking if the clamp piece 1 is made of brass and is inserted into an embedding made of ammonia-containing molding compound.
  • Paint-insulated conductor wires can be used for the connection. It has proven to be advantageous if, when the wire is cut to length, its ends 7 are cut on the narrow sides to the length of the depth of penetration V. The resulting sharp edges and the side cutting away of the insulating layer of the conductor wire create a good starting position for a calf welding during upsetting. Furthermore, by the side cutting also a conductor wire 3 of larger cross-section can be connected to the same terminal piece 1, it having been shown that the resulting reduction in cross-section has no adverse effect in any way.
  • connection described allows both copper and aluminum conductor wire to be used, and there are reliable, uniform series-produced connections of low electrical resistance and high thermal and mechanical stability.

Abstract

1. Connection of a conductor wire (3) to a terminal member (1) in a bore (2) which receives the conductor wire and which passes through the terminal member and in which the conductor wire is held by a squeeze action which changes its cross-section, characterized in that the conductor wire (3) which is of substantially rectangular cross-section is upset in a harmonica-like configuration in the form of a concertina-like stack in the bore (2) which is or round cross-section.

Description

Die Erfindung bezieht sich auf eine Verbindung eines Leiterdrahtes mit einem Klemmenstück sowie auf ein Verfahren zur Herstellung solcher Verbindungen nach den Oberbegriffen der Patentansprüche 1 und 2.The invention relates to a connection of a conductor wire to a terminal piece and to a method for producing such connections according to the preambles of claims 1 and 2.

Aus der AB-A-1 490 124 ist est bekannt, einen Leiterdraht runden Querschnittes in einer Bohrung eines Klemmenstückes durch einen Stauchvorgang im Durchmesser so zu erweitern, dass sich zwischen dem Leiterdraht und der Bohrungswand eine für den Stromübergang nötige Flächenpressung ergibt. In der Praxis hat es sich jedoch gezeigt, dass die Uebergangswiderstände sowie auch die mechanische Stabilität solcher Verbindungen beispielsweise für. den Anschluss von Stromspulen in Elektrizitätszählern nicht genügen.From AB-A-1 490 124 it is known to expand a round cross-section conductor wire in a bore of a terminal piece by an upsetting process in diameter so that there is a surface pressure necessary for the current transfer between the conductor wire and the bore wall. In practice, however, it has been shown that the transition resistances and also the mechanical stability of such connections are used, for example, for. the connection of current coils in electricity meters is not sufficient.

Der Erfindung liegt die Aufgabe zugrunde, eine einfach herzustellende Verbindung zu Schaffen, die einer Lötverbindung gleichwertig ist.The invention has for its object to provide a simple connection that is equivalent to a soldered connection.

Die Erfindung ist in den Patentansprüchen 1 und 2 gekennzeichnet.The invention is characterized in claims 1 and 2.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert.An exemplary embodiment of the invention is explained in more detail below with reference to the drawing.

Es zeigen:

  • Fig. 1 eine perspektivische Darstellung einer Verbindung und die
  • Fig. 2 bis 5 den Ablauf eines Stauchvorganges im Schnitt
Show it:
  • Fig. 1 is a perspective view of a connection and the
  • Fig. 2 to 5 the process of an upsetting process on average

In allen Figuren sind für die gleichen Teile die gleichen Bezugszeichen verwendet.The same reference numerals are used in all figures for the same parts.

Ein Klemmenstück 1 weist eine durchgehende Bohrung 2 für die Aufnahme eines mit dem Klemmenstück 1 zu verbindenden Leiterdrahtes 3 auf. Dieser kann das Ende irgend eines elektrischen Leiters sein. Vorteilhafterweise die nachfolgend beschriebene Verbindungsart bei Elektrizitätszählern angewandt, um deren Stromspulen, bestehend aus einem Leiterdraht 3 rechteckigen Querschnittes, an das Klemmenstück 1 anzuschliessen. Bei anderen Querschnittsformen sind die Leiterenden wenigstens auf der der Verbindung dienenden Länge rechteckig zu formen, beispielsweise durch Quetschen.A terminal piece 1 has a continuous bore 2 for receiving a conductor wire 3 to be connected to the terminal piece 1. This can be the end of any electrical conductor. Advantageously, the type of connection described below is used in electricity meters to connect their current coils, consisting of a conductor wire 3 with a rectangular cross section, to the terminal piece 1. In other cross-sectional shapes, the conductor ends are to be rectangular, at least over the length serving for the connection, for example by squeezing.

In der Figur 1 hat die Bohrung 2 auf ihrer ganzen Länge den gleichen Durchmesser, während in den Schnittzeichnungen der Figuren 2 bis 5 die Bohrung 2 ausserhalb einer für die Verbindung mit dem Leiterstück beanspruchten Länge L (Figur 2) in eine Bohrung 4 grösseren Durchmessers übergeht. Die grössere Bohrung 4 dient für den Anschluss von einem oder mehreren Drähten, die mittels zweier Gewindelöcher 5 (Figur 2) im Klemmenstück 1 von nicht dargestellten Schauben festklemmbar sind, während in der kleineren Bohrung 2 in der fertigen Verbindung der Leiterdraht 3, entsprechend der Figur 1, harmonikaartig in der Form eines Leporellostapels gestaucht ist.In FIG. 1, the bore 2 has the same diameter over its entire length, while in the sectional drawings of FIGS. 2 to 5 the bore 2 merges into a bore 4 of larger diameter outside of a length L (FIG. 2) claimed for the connection with the conductor piece . The larger hole 4 serves for the connection of one or more wires, which can be clamped by means of two threaded holes 5 (FIG. 2) in the clamping piece 1 by screws, not shown, while in the smaller hole 2 in the finished connection the conductor wire 3 corresponds to the figure 1, is compressed like a leporello stack.

Ein Verfahren zur Herstellung einer solchen Verbindung wird nachfolgend beschrieben:

  • Der zu verbindende Leiterdraht 3 wird in die Bohrung 2 hineingesteckt und mit zwei Klemmbacken 6 ausserhalb des Klemmenstückes 1 gehalten. Die Eindringtiefe V des Leiterdrahtendes 7 in das Klemmenstück 1 richtet sich nach der gewünschten Paketdicke S (Figur 1 und 5) der fertigen Verbindung und ist durch Versuche festzulegen. Der Leiterdraht 3 soll vor dem nachfolgend beschriebenen Verquetschen auf der ganzen Länge seiner Eindringtiefe V in der Bohrung 2 mit etwas Spiel geführt sein. Wenn sich die Bohrung 2 zu einer grösseren Bohrung 4 erweitert (Figur 2 bis 5), dann ist das in die Bohrung 4 vordringende Leiterdrahtende 7 während des Quetschvorganges in einer Führungshülse 8 gleichen Innendurchmessers wie die Bohrung 2 zu führen, denn sonst würde das Leiterdrahtende 7 seitlich ausweichen. Ein durch die Führungshülse 8 in die Bohrung 2 eindringender Stempel 9 verquetscht das Leiterdrahtende 7 in dem von der Bohrung 2, den Klemmbacken 6 und der Stempeistirnseite 10 umgrenzten Raum. Dabei knickt der Leiterdraht 3 auf der Längsseite seines Rechteckquerschnittes mehrfach aus, wie dies in den Figuren 3 bis 5 dargestellt ist. Die Reibung zwischen dem Leiterdraht 3 und der Wand der Bohrung 2 beim harmonikaartigen Zusammendrücken führt zu einer örtlichen Reibverschweissung, deren Verbindungsqualität einer Lötverbindung gleichgesetzt werden kann.
A method for producing such a connection is described below:
  • The conductor wire 3 to be connected is inserted into the bore 2 and held outside the terminal piece 1 with two clamping jaws 6. The penetration depth V of the conductor wire end 7 into the terminal piece 1 depends on the desired package thickness S (FIGS. 1 and 5) of the finished connection and is to be determined by tests. Before the squeezing described below, the conductor wire 3 should be guided with a little play over the entire length of its penetration depth V in the bore 2. If the bore 2 widens to a larger bore 4 (FIGS. 2 to 5), then the conductor wire end 7 penetrating into the bore 4 is to be guided in a guide sleeve 8 of the same inner diameter as the bore 2 during the crimping process, otherwise the conductor wire end 7 would dodge sideways. A punch 9 penetrating through the guide sleeve 8 into the bore 2 squeezes the conductor wire end 7 in the space delimited by the bore 2, the clamping jaws 6 and the face end face 10. The conductor wire 3 bends several times on the long side of its rectangular cross section, as shown in FIGS. 3 to 5. The friction between the conductor wire 3 and the wall of the bore 2 during the harmonica-like compression leads to a local friction welding, the connection quality of which can be equated to a soldered connection.

Um das Klemmenstück 1 nach dem Quetschvorgang in einem nahezu zugspannungslosen Zustand zu haben,. ist es vorteilhaft, wenn die Aussenseiten des Klemmenstückes 1, wenigstens längs der die fertige Verbindung aufweisenden Bohrung 2, während des Stauchvorganges von Spannbacken 11 (Figur 2) umschlossen werden. Diese pressen das Klemmenstück 1 zusammen und wirken den beim Quetschvorgang entstehenden Querkräften entgegen, so dass im Klemmenstück 1 der fertigen Verbindung nur kleine innere Spannungen verbleiben. Dies ist zur Vermeidung von Spannungsrisskorrosion dann wichtig, wenn das Klemmenstück 1 aus Messing besteht und in eine Einbettung aus ammoniakhaltiger Pressmasse eingelegt wird.In order to have the terminal piece 1 in an almost tension-free state after the crimping process. it is advantageous if the outer sides of the clamping piece 1, at least along the bore 2 having the finished connection, are enclosed by clamping jaws 11 (FIG. 2) during the upsetting process. These press the clamp piece 1 together and counteract the transverse forces generated during the squeezing process, so that only small internal stresses remain in the clamp piece 1 of the finished connection. This is important to avoid stress corrosion cracking if the clamp piece 1 is made of brass and is inserted into an embedding made of ammonia-containing molding compound.

Für die Verbindung können lackisolierte Leiterdrähte verwendet werden. Es hat sich als vorteilhaft erwiesen, wenn gleichzeitig mit dem Ablängen des Drahtes dessen Enden 7 an den Schmalseiten auf der Länge der Eindringtiefe V angeschnitten werden. Durch die entstehenden scharfen Kanten und das seitliche Wegschneiden der Isolierschicht des Leiterdrahtes entsteht eine gute Ausgangslage für ein Kalverschweissen beim Stauchen. Ferner kann durch das seitliche Anschneiden auch ein Leiterdraht 3 grösseren Querschnittes mit dem gleichen Klemmenstück 1 verbunden werden, wobei es sich gezeigt hat, dass sich die entstehende Querschnittverkleinerung in keiner Weise nachteilig auswirkt.Paint-insulated conductor wires can be used for the connection. It has proven to be advantageous if, when the wire is cut to length, its ends 7 are cut on the narrow sides to the length of the depth of penetration V. The resulting sharp edges and the side cutting away of the insulating layer of the conductor wire create a good starting position for a calf welding during upsetting. Furthermore, by the side cutting also a conductor wire 3 of larger cross-section can be connected to the same terminal piece 1, it having been shown that the resulting reduction in cross-section has no adverse effect in any way.

Die besten Verbindungen ergeben sich, wenn das Verhältnis von Breite zur Höhe des Rechteckquerschnittes längs der Eindringtiefe V des Leiterdrahtes 3 zwischen 5:1 und 2:1 liegt und wenn der Durchmesser der zugehörigen Bohrung 2 etwa 2 bis 10% grösser als die Diagonale des Rechteck-Querschnittes ist.The best connections are obtained when the ratio of the width to the height of the rectangular cross-section along the penetration depth V of the conductor wire 3 is between 5: 1 and 2: 1 and if the diameter of the associated hole 2 is about 2 to 10% larger than the diagonal of the rectangle -Section is.

Die beschriebene Verbindungsart erlaubt sowohl die Verwendung von Leiterdraht aus Kupfer als auch aus Aluminium, und es entstehen sichere und in der Serienfertigung gleichmässige anfallende Verbindungen geringen elektrischen Widerstandes und hoher thermischer und mechanischer Stabilität.The type of connection described allows both copper and aluminum conductor wire to be used, and there are reliable, uniform series-produced connections of low electrical resistance and high thermal and mechanical stability.

Claims (8)

1. Connection of a conductor wire (3) to a terminal member (1) in a bore (2) which receives the conductor wire and which passes through the terminal member and in which the conductor wire is held by a squeeze action which changes its cross-section, characterised in that the conductor wire (3) which is of substantially rectangular cross-section is upset in a harmonica-like configuration in the form of a concertina-like stack in the bore (2) which is of round cross-section.
2. A method of making the connection according to Claim 1 wherein the conductor wire (3) which is fitted into the bore (2) is held outside of the terminal member (1) by clamp jaws (6) and is upset by'a punch member (9) which passes into the bore from the other end thereof, characterised in that the punch member (9) which penetrates into the bore upsets the end (7) of the conductor wire in the space defined by the bore (2), the clamp jaws (6) and the end face (10) of the punch member in such a a way that the friction between the conductor- wire (3) which forms a multiplicity of bends on the long side of its rectangular cross-section, and the wall of the bore (2), when the conductor wire is upset in the harmonica-like configuration, results in a friction weld.
3. A method according to Claim 2 characterised in that the outsides of the terminal member (1) are enclosed by gripping jaws (11) during the upsetting operation, at least along the bore (2) having the finished connection.
4. A method according to Claim 2 characterised in that, when using a conductor wire (3) of rectangular cross-section, at the same time as the wire is cut to length, cuts are formed in the ends of the wire at the narrow sides thereof at the length of the depth (V) of penetration of the end (7) of the conductor wire into the terminal member (1).
5. A method according to one of Claims 2 to 4 characterised in that the 'end (7) of the conductor wire which, before the upsetting step, advances into a bore (4) of larger diameter, is guided during the squeeze operation by a guide sleeve (8) having the same inside diameter as the bore (2) for making the connection.
6. A connection according to Claim 1 characterised by use in an electricity meter for connecting the current coil ends (3) to a respective terminal member (1 ).
7. A connection according to Claim 1, characterised in that the conductor wire (3) comprises copper or aluminium.
8. A connection according to Claim 1 characterised in that the ratio of the width to the height of the rectangular cross-section, along the depth (V) of penetration of the conductor wire (3), is between 5:1 and 2:1 and that the diameter of the associated bore (2) is from about 2 to 1096 greater than the diagonal line of the rectangular cross-section.
EP79101358A 1978-06-20 1979-05-04 Connection of a wire conductor to a terminal and method for manufacturing such a connection Expired EP0006982B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79101358T ATE1124T1 (en) 1978-06-20 1979-05-04 CONNECTION OF A CONDUCTOR WIRE TO A CLAMP AND METHOD OF MAKING SUCH CONNECTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6724/78 1978-06-20
CH672478A CH629916A5 (en) 1978-06-20 1978-06-20 CONNECTING A LEAD WIRE TO A TERMINAL.

Publications (2)

Publication Number Publication Date
EP0006982A1 EP0006982A1 (en) 1980-01-23
EP0006982B1 true EP0006982B1 (en) 1982-05-26

Family

ID=4314053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101358A Expired EP0006982B1 (en) 1978-06-20 1979-05-04 Connection of a wire conductor to a terminal and method for manufacturing such a connection

Country Status (7)

Country Link
EP (1) EP0006982B1 (en)
JP (1) JPS5849985B2 (en)
AT (1) ATE1124T1 (en)
CH (1) CH629916A5 (en)
DE (1) DE2831812C2 (en)
ES (2) ES481668A1 (en)
YU (1) YU141179A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5054192A (en) * 1987-05-21 1991-10-08 Cray Computer Corporation Lead bonding of chips to circuit boards and circuit boards to circuit boards
DE102010053519B4 (en) * 2010-12-04 2016-06-16 Amphenol-Tuchel Electronics Gmbh Socket for producing a crimp connection

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603680A (en) * 1950-03-01 1952-07-15 Snyder Henry William Electrical plug connector
FR1487777A (en) * 1966-07-26 1967-07-07 Amp Inc assembled part of electrical connections
GB1490124A (en) * 1975-05-22 1977-10-26 Landis & Gyr Ag Methods of making electrical connections

Also Published As

Publication number Publication date
EP0006982A1 (en) 1980-01-23
ES481668A1 (en) 1980-01-16
ES481667A1 (en) 1980-01-16
ATE1124T1 (en) 1982-06-15
DE2831812B1 (en) 1979-05-17
DE2831812C2 (en) 1980-01-31
YU141179A (en) 1983-01-21
JPS553191A (en) 1980-01-10
CH629916A5 (en) 1982-05-14
JPS5849985B2 (en) 1983-11-08

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