WO1992022942A1 - Contact stud with a precious-metal contact plate - Google Patents

Contact stud with a precious-metal contact plate Download PDF

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Publication number
WO1992022942A1
WO1992022942A1 PCT/DE1992/000299 DE9200299W WO9222942A1 WO 1992022942 A1 WO1992022942 A1 WO 1992022942A1 DE 9200299 W DE9200299 W DE 9200299W WO 9222942 A1 WO9222942 A1 WO 9222942A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact pin
contact
cone
ribs
pin according
Prior art date
Application number
PCT/DE1992/000299
Other languages
German (de)
French (fr)
Inventor
Hans Wuerth
Franz Armbruster
Fritz Mauch
Karlheinz Boegner
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP92908063A priority Critical patent/EP0588801B1/en
Priority to JP4507483A priority patent/JPH06508236A/en
Priority to DE59202975T priority patent/DE59202975D1/en
Priority to KR1019930703803A priority patent/KR940701590A/en
Publication of WO1992022942A1 publication Critical patent/WO1992022942A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H11/043—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion by resistance welding
    • 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
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements

Definitions

  • the invention is based on a contact pin for switching high currents, in particular steel, with a contact plate made of noble metal, preferably copper, according to the preamble of patent claim 1.
  • Such a contact pin is already known from DE-C3-19 28 953, in which the contact plate made of noble metal has a conical recess on the back which is placed on a correspondingly obtuse-angled cone on the end face of the contact pin and by axial pressure the material of the contact plate is pressed both onto the obtuse-angled cone of the contact pin and into an undercut which surrounds the obtuse-angled cone as a central projection on the contact pin.
  • the electrically conductive connection between the contact pin and the contact board is consequently produced there by a positive connection between these parts.
  • the contact plate is deformed like a rivet head and forms a contact surface on the outside for switching high currents, as are required for starting relays and the like. It is also known to fasten the contact board by brazing on the front side of the contact bolt.
  • the soldering of the contact board has the disadvantage of a relatively complex post-treatment in order to restore the required strength of the contact bolt
  • the form-fitting riveting has the disadvantage of a relatively high contact resistance, which over the course of time is caused by strong temperature changes and one-sided loads on the switch contact elevated.
  • the aim of the present invention is to produce a permanent and reliable electrical and mechanical connection between the contact pin and the contact plate inexpensively and without additional aftertreatment.
  • the contact bolt according to the invention with the characterizing features of claim 1 has the advantage of a very small, constant contact resistance between the contact plate and contact screw without the risk of critical self-heating due to the current to be switched, since in the area of the welding point there is almost the entire conical outer surface intensive diffusion of the interconnected materials occurs.
  • Another advantage is that during resistance welding by the pressure of the welding electrode, the contact plate with its conical recess is pressed into the knurling or corrugation of the conical surface on the contact bolt, thereby producing a good metallurgical connection between steel and copper, which in itself do not let be welded together very easily.
  • the metallic protective layer in the form of a galvanized and chromated or a tinned cone surface of the contact bolt also contributes to this.
  • the measures listed in the subclaims result in further advantageous developments and improvements of the features specified in claim 1.
  • the formation of the knurling or corrugation from radial ribs arranged side by side and emerging from the conical surface is particularly advantageous.
  • a particularly intimate connection between copper and steel results from the fact that the ribs run out on a flat annular surface comprising the cone on the end face of the contact bolt.
  • the ribs preferably have a trapezoidal cross section.
  • the upper region of the cone is preferably smooth. From this area, the initially adjacent ribs then run outward in a star shape.
  • Contact pin and contact plate can be designed differently depending on the design of the switch.
  • the contact plate can be attached directly to the end of a threaded bolt. However, it can also be attached to the end face of a disk-shaped head of the contact bolt. Likewise, it may be expedient to arrange the obtuse-angled cone in an end recess in a head of the contact bolt.
  • FIG. 1 shows a contact plate with a conical recess and the conical end of a contact bolt in a greatly enlarged illustration
  • FIG. 2 shows the conical end face of the contact bolt according to FIG. 1
  • FIG. 3 shows a greatly enlarged cross section through the ribs emerging from the conical surface.
  • FIG. 4 shows the contact bolt with the contact plate fastened thereon
  • FIG. 5 shows a further embodiment with a contact plate fastened on a disk-shaped head of a contact bolt
  • FIG. 6 shows in a further embodiment a contact plate which is fastened in a recess of a contact bolt head
  • FIG. 7 shows the cross section through a contact bolt with a hexagon head.
  • a contact pin for a starting relay for switching the starting current is included
  • FIG. 1 shows, on a greatly enlarged scale, the contact plate 11 made of copper, which has a hexagonal cross section and whose contact surfaces 12 are chamfered on the upper part of the contact plate 11 and are slightly arched inwards.
  • the contact bolt 10 which is provided with a thread 14, is made of steel and has at its end face an obtuse-angled cone 15 which corresponds to the cone recess 13.
  • the corrugation 16 consists of radial ribs 17 arranged next to one another, which emerge from the surface of the cone 15. It can be seen from FIG.
  • these ribs 17 have a trapezoidal cross section, so that they taper towards the contact plate 11.
  • the spacing of the ribs 17 from one another increases towards the outside, so that the copper material displaced by the ribs 17 during the resistance welding of the contact plate 11 to the contact bolt 10 can escape into these areas.
  • the front end face of the contact pin 10 according to FIG. 2 is provided with a metallic protective coating, ie it has a tin-plated or galvanized and chromated surface.
  • the contact plate 11 with its cone recess 13 is placed on this surface and pressed onto the cone 15 of the contact bolt with a welding electrode in such a way that it is pressed with its cone recess 13 into the knurling or corrugation and is fixed to the cone 15 by an electrical resistance weld.
  • FIG. 5 shows, as a further exemplary embodiment, a contact pin 20, in which the obtuse-angled cone 15 with the radially extending ribs is arranged on the end face of a disk-shaped head 21 of the contact pin 20.
  • a contact plate 22 with its rear cone recess 13 is welded onto this cone 15, the configuration of the cone 15 and the cone recess 13 of the contact plate 22 corresponding to that of the first exemplary embodiment according to FIGS. 1 to 4.
  • a contact bolt 30 is shown, the cone 15 of which, with the radially extending ribs, is arranged in an end recess 31 in the head 32 of the contact bolt 30.
  • a correspondingly designed contact plate 33 also has a cone recess 13 corresponding to the cone contour on its rear side.
  • the front contact surface of the contact plate 33 is produced here after the resistance welding by a wobble riveting process.
  • the head of the contact pin 20 or 30 can be cylindrical or, as shown in FIG. 7, the contact pin 30 can also be designed with a hexagon head 32.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Contacts (AREA)

Abstract

Proposed is a contact stud (10) for conducting high currents, in particular in starting relays, the contact plate (11) being made of a precious metal, in particular copper, and the stud and plate being joined tightly together at an obtuse-angled conical interface to form an electrically conducting connection. In order to ensure a reliable, permanent electrical connection between the stud (10) and plate (11), with a low contact resistance between the two, the conical stud tip (15) has corrugations or serrations at least in the zone (15b) near the edge of the conical surface. The contact plate (11) has a conical recess (13) which is pressed over the corrugations or serrations (16) on the conical tip (15) of the stud and welded in place by resistance welding.

Description

Kontaktbolzen mit Kontaktplatte aus edlerem MetallContact pin with contact plate made of noble metal
Stand der TechnikState of the art
Die Erfindung geht aus von einem Kontaktbolzen zum Schalte hoher Stromstärken, insbesondere aus Stahl, mit einer Kontaktplatte aus edlerem Metall, vorzugsweise Kupfer,nach dem Oberbegriff des Patent¬ anspruchs 1.The invention is based on a contact pin for switching high currents, in particular steel, with a contact plate made of noble metal, preferably copper, according to the preamble of patent claim 1.
Aus der DE-C3-19 28 953 ist bereits ein derartiger Kontaktbolzen bekannt, bei dem die aus edlerem Metall hergestellte Kontaktplatine auf der Rückseite eine keglige Ausnehmung aufweist, welche auf einen entsprechend stumpfwinkligen Kegel an der Stirnseite des Kontakt¬ bolzens aufgesetzt und durch axialen Druck der Werkstoff der Kontaktplatine sowohl auf den stumpfwinkligen Kegel des Kontakt¬ bolzens als auch in eine Hinterschneidung gepreßt wird, die den stumpfwinkligen Kegel als zentrischen Vorsprung am Kontaktbolzen einfaßt. Die elektrisch leitende Verbindung zwischen Kontaktbolzen und Kontaktplatine wird dort folglich durch eine formschlüssige Verbindung dieser Teile miteinander hergestellt. Die Kontaktplatine wird dabei wie ein Nietkopf verformt und bildet nach außen hin eine Kontaktfläche zum Schalten hoher Stromstärken, wie sie für Anla߬ relais und dergleichen benötigt werden. Bekannt ist ferner, die Kontaktplatine durch Hartlöten an der Stirn¬ seite vom Kontaktbolzen zu befestigen.Such a contact pin is already known from DE-C3-19 28 953, in which the contact plate made of noble metal has a conical recess on the back which is placed on a correspondingly obtuse-angled cone on the end face of the contact pin and by axial pressure the material of the contact plate is pressed both onto the obtuse-angled cone of the contact pin and into an undercut which surrounds the obtuse-angled cone as a central projection on the contact pin. The electrically conductive connection between the contact pin and the contact board is consequently produced there by a positive connection between these parts. The contact plate is deformed like a rivet head and forms a contact surface on the outside for switching high currents, as are required for starting relays and the like. It is also known to fasten the contact board by brazing on the front side of the contact bolt.
Während das Hartlöten der Kontaktplatine den Nachteil einer relativ aufwendigen Wärmenachbehandlung hat, um die erforderliche Festigkeit des Kontaktbolzens wieder herzustellen, hat die formschlüssige Ein- nietung den Nachteil eines relativ hohen Übergangswiderstandes, der sich im Laufe der Zeit durch starke Temperaturwechsel und einseitige Belastungen des Schaltkontaktes noch erhöht.While the soldering of the contact board has the disadvantage of a relatively complex post-treatment in order to restore the required strength of the contact bolt, the form-fitting riveting has the disadvantage of a relatively high contact resistance, which over the course of time is caused by strong temperature changes and one-sided loads on the switch contact elevated.
Mit der vorliegenden Erfindung wird angestrebt, eine dauerhafte und zuverlässige elektrische und mechanische Verbindung zwischen Kontaktbolzen und Kontaktplatte kostengünstig und ohne zusätzliche Nachbehandlung herzustellen.The aim of the present invention is to produce a permanent and reliable electrical and mechanical connection between the contact pin and the contact plate inexpensively and without additional aftertreatment.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Kontaktbolzen mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat den Vorteil eines sehr kleinen, gleich¬ bleibenden Übergangswiderstandes zwischen Kontaktplatte und Kontakt¬ schraube ohne Gefahr einer kritischen Eigenerwärmung durch den zu schaltenden Strom, da im Bereich der Schweißstelle auf nahezu der gesamten kegelförmigen Mantelfläche eine intensive Diffusion der miteinander verbundenen Materialien zustandekommt. Ein weiterer Vorteil besteht darin, daß bei der Widerstandsschweißung durch den Anpreßdruck der Schweißelektrode die Kontaktplatte mit ihrer kegeligen Ausnehmung in die Rändelung bzw. Riffelung der Kegelfläche am Kontaktbolzen eingepreßt wird und dabei eine gute metallurgische Verbindung zwischen Stahl und Kupfer hergestellt wird, die sich an sich nicht besonders leicht miteinander verschweißen lassen. Dazu trägt ferner die metallische Schutzschicht in Form einer verzinkten und chromatierten oder einer verzinnten Kegeloberfläche des Kontakt¬ bolzens bei. Durch die in den Unteransprüchen aufgeführten Maßnahmen ergeben sich weitere vorteilhafte Weiterbildungen und Verbesserungen der im Patentanspruch 1 angegbenen Merkmale. Besonders vorteilhaft ist dabei die Ausbildung der Rändelung bzw. Riffelung aus ringsum nebeneinander angeordneten, aus der Kegelfläche hervortretenden radialen Rippen. Eine besonders innige Verbindung zwischen Kupfer und Stahl ergibt sich dadurch, daß die Rippen an einer den Kegel umfassenden ebenen Ringfläche auf der Stirnseite des Kontaktbolzens auslaufen. Die Rippen haben dabei vorzugsweise einen trapezförmigen Querschnitt. Vorzugsweise ist dabei der obere Bereich des Kegels glatt ausgebildet. Von diesem Bereich aus verlaufen dann die zunächst aneinander angrenzenden Rippen sternförmig nach außen.The contact bolt according to the invention with the characterizing features of claim 1 has the advantage of a very small, constant contact resistance between the contact plate and contact screw without the risk of critical self-heating due to the current to be switched, since in the area of the welding point there is almost the entire conical outer surface intensive diffusion of the interconnected materials occurs. Another advantage is that during resistance welding by the pressure of the welding electrode, the contact plate with its conical recess is pressed into the knurling or corrugation of the conical surface on the contact bolt, thereby producing a good metallurgical connection between steel and copper, which in itself do not let be welded together very easily. The metallic protective layer in the form of a galvanized and chromated or a tinned cone surface of the contact bolt also contributes to this. The measures listed in the subclaims result in further advantageous developments and improvements of the features specified in claim 1. The formation of the knurling or corrugation from radial ribs arranged side by side and emerging from the conical surface is particularly advantageous. A particularly intimate connection between copper and steel results from the fact that the ribs run out on a flat annular surface comprising the cone on the end face of the contact bolt. The ribs preferably have a trapezoidal cross section. The upper region of the cone is preferably smooth. From this area, the initially adjacent ribs then run outward in a star shape.
Kontaktbolzen und Kontaktplatte können dabei je nach Ausbildung des Schalters unterschiedlich gestaltet sein. Für Einrückrelais von Anlaßvorrichtungen in Kraftfahrzeugen und dergleichen kann die Kontaktplatte unmittelbar am Ende eines Gewindebolzens befestigt sein. Sie kann aber auch an der Stirnseite eines scheibenförmigen Kopfes des Kontaktbolzens befestigt sein. Ebenso ist es ggf. zweck¬ mäßig, den stumpfwinkligen Kegel in einer stirnseitigen Ausnehmung in einem Kopf des Kontaktbolzens anzuordnen.Contact pin and contact plate can be designed differently depending on the design of the switch. For engaging relays of starting devices in motor vehicles and the like, the contact plate can be attached directly to the end of a threaded bolt. However, it can also be attached to the end face of a disk-shaped head of the contact bolt. Likewise, it may be expedient to arrange the obtuse-angled cone in an end recess in a head of the contact bolt.
Zeichnungdrawing
Ausführungsbeisρiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Kontaktplatte mit kegeliger Ausnehmung sowie das kegelige Ende eines Kontaktbolzens in stark vergrößerter Dar¬ stellung, Figur 2 zeigt die kegelige Stirnfläche des Kontaktbolzens nach Figur 1 und Figur 3 zeigt einen stark vergrößerten Querschnitt durch die aus der Kegelfläche hervortretenden Rippen. Figur 4 zeigt den Kontaktbolzen mit darauf befestigter Kontaktplatte, Figur 5 zeigt ein weiteres Ausführungsbeispiel mit einer auf einem scheiben¬ förmigen Kopf eines Kontaktbolzens befestigten Kontaktplatte, Figur 6 zeigt in einem weiteren Ausführungsbeispiel eine Kontaktplatte, die in einer Ausnehmung eines Kontaktbolzenkopfes befestigt ist und Figur 7 zeigt den Querschnitt durch einen Kontaktbolzen mit Sechs¬ kantkopf.Exemplary embodiments of the invention are shown in the drawing and explained in more detail in the description below. FIG. 1 shows a contact plate with a conical recess and the conical end of a contact bolt in a greatly enlarged illustration, FIG. 2 shows the conical end face of the contact bolt according to FIG. 1 and FIG. 3 shows a greatly enlarged cross section through the ribs emerging from the conical surface. FIG. 4 shows the contact bolt with the contact plate fastened thereon, FIG. 5 shows a further embodiment with a contact plate fastened on a disk-shaped head of a contact bolt, FIG. 6 shows in a further embodiment a contact plate which is fastened in a recess of a contact bolt head and FIG. 7 shows the cross section through a contact bolt with a hexagon head.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In einem ersten Ausführungsbeispiel gemäß Figur 1 bis 4 ist ein Kontaktbolzen für ein Anlaßrelais zum Schalten des Anlaßstromes mitIn a first exemplary embodiment according to FIGS. 1 to 4, a contact pin for a starting relay for switching the starting current is included
10 bezeichnet, der an seiner vorderen Stirnseite eine Kontaktplatte10 denotes a contact plate on its front face
11 trägt. Figur 1 zeigt in stark vergrößertem Maßstab die aus Kupfer hergestellte Kontaktplatte 11, die einen sechseckigen Querschnitt hat und deren Kontaktflächen 12 am oberen Teil der Kontaktplatte 11 angeschrägt und leicht nach innen durchgewölbt sind. In einem Aus¬ bruch der Kontaktplatte 11 ist erkennbar, daß diese an ihrer Rück¬ seite eine glatte, stumpfwinklige Kegelausnehmung 13 aufweist. Der mit einem Gewinde 14 versehene Kontaktbolzen 10 ist aus Stahl her¬ gestellt und hat an seiner Stirnseite einen der Kegelausnehmung 13 entsprechenden stumpfwinkligen Kegel 15. Der Kegel 15 ist an seinem äußeren Ringbereich mit einer Rändelung bzw. Riffelung 16 versehen. Wie Figur 2 darstellt, besteht die Riffelung 16 aus nebeneinander angeordneten, radialen Rippen 17, die aus der Oberfläche des Kegels 15 hervortreten. Aus Figur 3 ist erkennbar, daß diese Rippen 17 einen trapezförmigen Querschnitt haben, so daß sie sich zur Kontakt¬ platte 11 hin verjüngen. Der Abstand der Rippen 17 zueinander nimmt nach außen hin zu, so daß das bei der Widerstandsschweißung der Kontaktplatte 11 mit dem Kontaktbolzen 10 von den Rippen 17 ver¬ drängte Kupfermaterial in diese Bereiche ausweichen kann. Die Rippen11 carries. FIG. 1 shows, on a greatly enlarged scale, the contact plate 11 made of copper, which has a hexagonal cross section and whose contact surfaces 12 are chamfered on the upper part of the contact plate 11 and are slightly arched inwards. In a breakout of the contact plate 11 it can be seen that it has a smooth, obtuse-angled conical recess 13 on its rear side. The contact bolt 10, which is provided with a thread 14, is made of steel and has at its end face an obtuse-angled cone 15 which corresponds to the cone recess 13. As FIG. 2 shows, the corrugation 16 consists of radial ribs 17 arranged next to one another, which emerge from the surface of the cone 15. It can be seen from FIG. 3 that these ribs 17 have a trapezoidal cross section, so that they taper towards the contact plate 11. The spacing of the ribs 17 from one another increases towards the outside, so that the copper material displaced by the ribs 17 during the resistance welding of the contact plate 11 to the contact bolt 10 can escape into these areas. Ribs
17 laufen dabei in einer den Kegel 15 umfassenden ebenen Ringfläche17 run in a flat annular surface comprising the cone 15
18 an der Stirnseite des Kontaktbolzens 10 aus. Zumindest das obere Drittel des Kegels 15 ist glatt, so daß die Rippen 17 von diesem Bereich aus zunächst aneinander angrenzend sternförmig nach außen verlaufen. Die vordere Stirnfläche des Kontaktbolzens 10 gemäß Figur 2 ist mit einem metallischen Schutzüberzug versehen, d. h. sie hat eine verzinnte oder verzinkte und chromatisierte Oberfläche. Auf diese Oberfläche wird die Kontaktplatte 11 mit ihrer Kegelausnehmung 13 aufgesetzt und mit einer Schweißelektrode derart auf den Kegel 15 des Kontaktbolzen gedrückt, daß sie mit ihrer Kegelausnehmung 13 in die Rändelung bzw. Riffelung eingepreßt und durch eine elektrische Widerstandsschweißung am Kegel 15 befestigt wird.18 from the end face of the contact pin 10. At least the upper third of the cone 15 is smooth, so that the ribs 17 of this Initially, the area is adjacent to each other in a star shape. The front end face of the contact pin 10 according to FIG. 2 is provided with a metallic protective coating, ie it has a tin-plated or galvanized and chromated surface. The contact plate 11 with its cone recess 13 is placed on this surface and pressed onto the cone 15 of the contact bolt with a welding electrode in such a way that it is pressed with its cone recess 13 into the knurling or corrugation and is fixed to the cone 15 by an electrical resistance weld.
Figur 5 zeigt als weiteres Ausführungsbeispiel einen Kontaktbolzen 20, bei dem der stumpfwinklige Kegel 15 mit den radial verlaufenden Rippen an der Stirnseite eines scheibenförmigen Kopfes 21 des Kontaktbolzens 20 angeordnet ist. Auf diesen Kegel 15 ist eine Kontaktplatte 22 mit ihrer rückseitigen Kegelausnehmung 13 fest¬ geschweißt, wobei die Ausgestaltung des Kegels 15 und der Kegelaus¬ nehmung 13 der Kontaktplatte 22 der des ersten Ausführungsbeispieles nach Figur 1 bis 4 entspricht.FIG. 5 shows, as a further exemplary embodiment, a contact pin 20, in which the obtuse-angled cone 15 with the radially extending ribs is arranged on the end face of a disk-shaped head 21 of the contact pin 20. A contact plate 22 with its rear cone recess 13 is welded onto this cone 15, the configuration of the cone 15 and the cone recess 13 of the contact plate 22 corresponding to that of the first exemplary embodiment according to FIGS. 1 to 4.
In einem weiteren Ausführungsbeispiel nach Figur 6 ist ein Kontakt¬ bolzen 30 dargestellt, dessen Kegel 15 mit den radial verlaufenden Rippen in einer stirnseitigen Ausnehmung 31 im Kopf 32 des Kontakt¬ bolzens 30 angeordnet ist. Eine entsprechend ausgebildete Kontakt¬ platte 33 hat ebenfalls an ihrer Rückseite eine der Kegelkontur entsprechende Kegelausnehmung 13. Die vordere Kontaktfläche der Kontaktplatte 33 wird hier nach der Widerstandsschweißung durch einen Taumelnietvorgang hergestellt. Der Kopf des Kontaktbolzens 20 bzw. 30 kann zylindrisch ausgebildet sein oder wie Figur 7 dar¬ stellt, kann der Kontaktbolzen 30 auch mit einem Sechskantkopf 32 ausgebildet sein. In a further exemplary embodiment according to FIG. 6, a contact bolt 30 is shown, the cone 15 of which, with the radially extending ribs, is arranged in an end recess 31 in the head 32 of the contact bolt 30. A correspondingly designed contact plate 33 also has a cone recess 13 corresponding to the cone contour on its rear side. The front contact surface of the contact plate 33 is produced here after the resistance welding by a wobble riveting process. The head of the contact pin 20 or 30 can be cylindrical or, as shown in FIG. 7, the contact pin 30 can also be designed with a hexagon head 32.

Claims

Ansprüche Expectations
1. Kontaktbolzen zum Schalten hoher Stromstärken, insbesondere aus Stahl, mit einer Kontaktplatte aus edlerem Metall, vorzugsweise Kupfer, wobei die elektrisch leitende innige Verbindung zwischen dem Kontaktbolzen und der Kontaktplatte aus einem stumpfwinkligen Kegel mit einem metallischen Schutzüberzug an der Stirnseite des Kontakt¬ bolzens und einer entsprechend stumpfwinkligen Kegelausnehmung an der dem Kegel des Kontaktbolzens zugekehrten Rückseite der Kontakt¬ platte besteht, dadurch gekennzeichnet, daß der Kegel (15) des Kontaktbolzens (10; 20; 30) zumindest im äußeren Ringbereich (15b) mit einer Rändelung bzw. Riffelung (16) versehen ist und daß die Kontaktplatte (11; 22; 33) mit ihrer Kegelausnehmung (13) in die Rändelung bzw. Riffelung (16) eingepreßt und durch eine Widerstands¬ schweißung (19) am Kegel (15) des Kontaktbolzens (10; 20; 30) befestigt ist.1. Contact pin for switching high currents, in particular steel, with a contact plate made of noble metal, preferably copper, the electrically conductive intimate connection between the contact pin and the contact plate consisting of an obtuse-angled cone with a metallic protective coating on the end face of the contact pin and there is a corresponding obtuse-angled cone recess on the rear side of the contact plate facing the cone of the contact pin, characterized in that the cone (15) of the contact pin (10; 20; 30) is knurled or corrugated (at least in the outer ring region (15b)) 16) and that the contact plate (11; 22; 33) with its cone recess (13) is pressed into the knurling or corrugation (16) and by a resistance weld (19) on the cone (15) of the contact bolt (10; 20; 30) is attached.
2. Kontaktbolzen nach Anspruch 1, dadurch gekennzeichnet, daß die Riffelung (16) aus ringsum nebeneinander angeordneten radialen Rippen (17) besteht, die aus der Oberfläche des Kegels (15) hervor¬ treten. 2. Contact pin according to claim 1, characterized in that the corrugation (16) consists of radial ribs (17) which are arranged all around one another and emerge from the surface of the cone (15).
3. Kontaktbolzen nach Anspruch 2, dadurch gekennzeichnet, daß die Rippen (17) in einer den Kegel (15) umfassenden ebenen Ringfläche (18) auf der Stirnseite des Kontaktbolzens (10; 20; 30) auslaufen.3. Contact pin according to claim 2, characterized in that the ribs (17) in a cone (15) comprising a flat annular surface (18) on the end face of the contact pin (10; 20; 30) run out.
4. Kontaktbolzen nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Rippen (17) trapezförmigen Querschnitt haben.4. Contact pin according to claim 2 or 3, characterized in that the ribs (17) have a trapezoidal cross section.
5. Kontaktbolzen nach einem der Ansprüche 2 bis 4, dadurch gekenn¬ zeichnet, daß der obere Bereich zumindest das obere Drittel (15a) des Kegels (15) glatt ist und von diesem Bereich aus die Rippen (17) zunächst aneinander angrenzend sternförmig nach außen verlaufen.5. Contact pin according to one of claims 2 to 4, characterized gekenn¬ characterized in that the upper region at least the upper third (15a) of the cone (15) is smooth and from this area the ribs (17) initially adjacent to one another in a star shape to the outside run.
6. Kontaktbolzen nach einem der Ansprüche 2 bis 5, dadurch gekenn¬ zeichnet, daß der Kegel (15) mit den radial verlaufenden Rippen (17) an der Stirnseite eines scheibenförmigen Kopfes (21) des Kontakt¬ bolzens (20) angeordnet ist.6. Contact pin according to one of claims 2 to 5, characterized gekenn¬ characterized in that the cone (15) with the radially extending ribs (17) on the end face of a disc-shaped head (21) of the contact bolt (20) is arranged.
7. Kontaktbolzen nach einem der Ansprüche 2 bis 5, dadurch gekenn¬ zeichnet, daß der Kegel (15) mit den radial verlaufenden Rippen (17) in einer stirnseitigen Ausnehmung (31) in einem Kopf (32) des Kontaktbolzens (30) angeordnet ist.7. Contact pin according to one of claims 2 to 5, characterized gekenn¬ characterized in that the cone (15) with the radially extending ribs (17) is arranged in an end recess (31) in a head (32) of the contact pin (30) .
8. Kontaktbolzen nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Kegel (15) mit der Riffelung (16) mit einer verzinkten chromatierten oder einer verzinnten Oberfläche versehen ist.8. Contact pin according to one of the preceding claims, characterized in that the cone (15) with the corrugation (16) is provided with a galvanized chromated or tinned surface.
9. Kontaktbolzen nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Kontaktbolzen (30) als Gewindebolzen mit Sechskantkopf (32) ausgebildet ist. 9. Contact pin according to one of the preceding claims, characterized in that the contact pin (30) is designed as a threaded bolt with a hexagon head (32).
PCT/DE1992/000299 1991-06-12 1992-04-10 Contact stud with a precious-metal contact plate WO1992022942A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP92908063A EP0588801B1 (en) 1991-06-12 1992-04-10 Contact stud with a precious-metal contact plate
JP4507483A JPH06508236A (en) 1991-06-12 1992-04-10 Contact pins with precious metal contact plates
DE59202975T DE59202975D1 (en) 1991-06-12 1992-04-10 CONTACT BOLT WITH CONTACT PLATE MADE OF NOBLE METAL.
KR1019930703803A KR940701590A (en) 1991-06-12 1992-04-10 Contact bolts with contact plates made of precious metals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4119298.2 1991-06-12
DE4119298A DE4119298A1 (en) 1991-06-12 1991-06-12 CONTACT BOLT WITH CONTACT PLATE MADE OF PRECIOUS METAL

Publications (1)

Publication Number Publication Date
WO1992022942A1 true WO1992022942A1 (en) 1992-12-23

Family

ID=6433724

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000299 WO1992022942A1 (en) 1991-06-12 1992-04-10 Contact stud with a precious-metal contact plate

Country Status (5)

Country Link
EP (1) EP0588801B1 (en)
JP (1) JPH06508236A (en)
KR (1) KR940701590A (en)
DE (2) DE4119298A1 (en)
WO (1) WO1992022942A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008060971B3 (en) * 2008-12-06 2010-07-08 Ami Doduco Gmbh Contact part for high voltage switch

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD980131A1 (en) * 1998-07-21 2000-01-21 Sta Fil S P A PRODUCTION PROCESS OF BIMETALLIC CONTACTS FOR ELECTROMAGNETIC BLOCKS OF STARTER ENGINES AND RELATED
DE102012101222A1 (en) * 2011-12-21 2013-06-27 Alutec Metal Innovations Gmbh & Co. Kg Contact pin for high-voltage circuit breaker and high-voltage circuit breaker with such a contact pin
AT13815U3 (en) * 2014-02-21 2015-05-15 Plansee Powertech Ag Contact pin and pipe contact and method of manufacture
CN108735556B (en) * 2018-06-27 2020-02-07 西安西电开关电气有限公司 Method for producing a resistor contact and resistor contact

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337947A (en) * 1964-06-29 1967-08-29 Aluminum Co Of America Method of joining electrical contacts to aluminum parts
DE1949957A1 (en) * 1969-10-03 1971-04-15 Bosch Gmbh Robert Connection element for electrical conductors made of different metals
EP0298410A1 (en) * 1987-07-06 1989-01-11 Siemens Aktiengesellschaft Electrical component with contact pins

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337947A (en) * 1964-06-29 1967-08-29 Aluminum Co Of America Method of joining electrical contacts to aluminum parts
DE1949957A1 (en) * 1969-10-03 1971-04-15 Bosch Gmbh Robert Connection element for electrical conductors made of different metals
EP0298410A1 (en) * 1987-07-06 1989-01-11 Siemens Aktiengesellschaft Electrical component with contact pins

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008060971B3 (en) * 2008-12-06 2010-07-08 Ami Doduco Gmbh Contact part for high voltage switch

Also Published As

Publication number Publication date
JPH06508236A (en) 1994-09-14
EP0588801B1 (en) 1995-07-19
DE59202975D1 (en) 1995-08-24
EP0588801A1 (en) 1994-03-30
DE4119298A1 (en) 1992-12-17
KR940701590A (en) 1994-05-28

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