US20140144015A1 - Method for electrically conductively connecting a contact piece to an electrical conductor, and corresponding arrangement - Google Patents

Method for electrically conductively connecting a contact piece to an electrical conductor, and corresponding arrangement Download PDF

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Publication number
US20140144015A1
US20140144015A1 US14/087,146 US201314087146A US2014144015A1 US 20140144015 A1 US20140144015 A1 US 20140144015A1 US 201314087146 A US201314087146 A US 201314087146A US 2014144015 A1 US2014144015 A1 US 2014144015A1
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United States
Prior art keywords
contact part
conductor
tool
protrusion
arrangement according
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.)
Abandoned
Application number
US14/087,146
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English (en)
Inventor
Udo Mayer
Helmut Steinberg
Andreas Pedimonte
Jean Pierre BERGMANN
Rene Schurer
Toni Muller
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Nexans SA
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Nexans SA
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Assigned to NEXANS reassignment NEXANS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MUELLER, TONI, BERGMANN, JEAN PIERRE, SCHUERER, RENE, MAYER, UDO, PEDIMONTE, ANDREAS, STEINBERG, HELMUT
Publication of US20140144015A1 publication Critical patent/US20140144015A1/en
Priority to US14/831,413 priority Critical patent/US10404025B2/en
Abandoned 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
    • 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
    • H01R43/0214—Resistance welding
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/1205—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using translation movement
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/125—Rotary tool drive mechanism
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1265—Non-butt welded joints, e.g. overlap-joints, T-joints or spot 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or work
    • 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
    • H01R4/023—Soldered or welded connections between cables or wires and terminals
    • 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
    • H01R4/18—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 by crimping
    • H01R4/187—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 by crimping combined with soldering or 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
    • H01R4/10—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
    • H01R4/18—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 by crimping
    • H01R4/20—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 by crimping using a crimping sleeve
    • 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
    • H01R4/625—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
    • 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
    • H01R43/0207—Ultrasonic-, H.F.-, cold- or impact 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
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
    • 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
    • B23K2101/32—Wires
    • 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
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor
    • Y10T29/49179—Assembling terminal to elongated conductor by metal fusion bonding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor
    • Y10T29/49181—Assembling terminal to elongated conductor by deforming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/532—Conductor
    • Y10T29/53209—Terminal or connector
    • Y10T29/53213—Assembled to wire-type conductor

Definitions

  • the invention relates to a method for electrically conductively connecting a contact piece on the basis of copper to an electrical conductor consisting of a plurality of individual wires of aluminum, as well as a corresponding arrangement.
  • the contact piece on the basis of copper consists either of copper or of a copper alloy. Additionally, it may have on its outer surface a layer of, for example, tin, zinc or nickel which are for example, precipitated galvanically. In the following, the contact piece is referred to only as “contact piece” without material identification.
  • the individual wires of the conductor are either of aluminum or an aluminum alloy. In the following, only the material “aluminum” is taken into consideration.
  • Conductors of aluminum are increasingly used especially as replacement for copper conductors for reasons of weight and cost. Principal fields of use of such conductors are, for example, automobile and airplane technology. The lower electrical conductivity of the aluminum as compared to copper does not play a role for most applications.
  • problems occur when placing contact parts on the conductors because aluminum conductors are surrounded by an electrically very poorly conducting oxide layer. This deficiency becomes apparent in the case of conductors which are composed of a plurality of individual wires, also called stranded conductors, each of which is surrounded by an oxide layer which cannot be avoided without special treatment. This problem has been known for a long time and is described in numerous documents, wherein the following four references shall be mentioned.
  • DE 102 23 397 B4 discloses a method by means of which a contact element is electrically mounted on a stranded conductor of aluminum wires.
  • a metal sleeve which is covered on the inner side with tin is pushed onto the end of the stranded conductor.
  • the individual wires are then galvanized or welded at their end faces and with the sleeve by means of ultrasound or protective gas welding.
  • the oxide layers which surround the individual layers are to be broken open in this process. This results in a cover like tinning or welding at the end of the stranded conductor.
  • the contact element is pushed on and pressed together with the end of the stranded conductor.
  • the cover-like tinning or welding is not included in the pressing procedure.
  • DE 103 46 160 B3 describes a method for contacting an aluminum conductor constructed as a stranded conductor in which a contact clamp, which is coated with tin on the inner side and composed of copper, is pushed onto the end of a stranded conductor consisting of aluminum.
  • the tubular contact clamp is coated with tin at the end face of the aluminum conductor by means of ultrasound tinning together with the same, or is welded metal against metal by means of a known welding method.
  • a supply of contacting agent is applied to the end of an existing stranded conductor and is heated at least up to the range of its melting temperature.
  • a material connection is to be obtained between the stranded conductor and a cup-shaped contact element which is simultaneously or subsequently pushed onto the stranded conductor.
  • the stranded conductor can be clipped into a tin bath, thereby a portion of the stranded conductor can be severed or cut for forming a fresh cutting or severing surface in the tin bath.
  • the contact element is pressed around the stranded conductor with decreasing effect of the tension.
  • DE 10 2011 018 353 A1 describes a method for connecting a contact part with a stranded conductor consisting of aluminum.
  • a support sleeve is mounted on the stranded conductor at its end and is pressed together with the same.
  • a rotationally symmetrical contact part is welded to the end face of the stranded conductor, for example, by means of rotational friction welding.
  • an inter-metal is formed between the contact part and the stranded conductor.
  • the invention is based on the object of indicating a method for connecting a contact part to an aluminum conductor consisting of individual aluminum wires, through which an effective electrically conductive connection between the entire cross section and the contact part can be achieved.
  • a contact part on the basis of copper is electrically conductively connected to an electrical conductor containing aluminum, in which a contact part is used which contains a bottom and a cylindrical sleeve integrally connected to the bottom and from the sleeve, which, when tightly resting against the sleeve, can be pushed onto the conductor to such an extent that the end face of the conductor rests on the floor of the contact part by means of: which subsequently at least one rotating tool is placed with sustained pressure at least in the area of the floor until, due to increased temperature caused by friction the material of the conductor is increased to such an extent that it is integrally connected with the contact part or is welded to the contact part by diffusion, wherein the wall, of the contact part is not broken through the tool, and by which, subsequently, the tool is removed from the contact part.
  • the conductor is also at its ends initially freed of possibly present layers, particularly of an insulation surrounding the layer.
  • the contact part is slid, particularly by an insulation surrounding the same, onto the end of the conductor exposed in this manner.
  • the contact part is pushed onto the conductor until its end face rests against the bottom of the contact part. Additional materials such as tin or fastening elements are not used.
  • the tool can be pressed at least against the bottom of the contact part and the contact part is also pressed against the tool.
  • the latter When placing the tool against the contact part, the latter is advantageously already placed in rotation. However, it can also be placed in rotation only after placement of the contact part.
  • the tool rotates with a sufficiently high rate of rotation so that as a consequence of the high temperature produced by the friction, the aluminum of the conductor changes into a doughy state.
  • the material of the contact part is in this procedure also heated, it can only be done to such an extent that the wall of the contact part is pressed in the direction of the conductor. A penetration of the wall of the contact part does not take place.
  • the aluminum of the conductor is already softened to such an extent that it can integrally connect with the contact part or by diffusion to the contact part. This is achieved by the increased temperature and the pressure exerted from the tool onto the contact part. Any oxide layers present in the conductor are broken up, so that the electrically conductive connection between conductor and contact part is not impaired. The tool can then be removed from the contact part.
  • the tool is also additionally or exclusively used at the circumferential surface of the sleeve.
  • the tool can be inserted, for example, at three locations which are offset by 120° in the circumferential direction; however, it can also be pressed against the sleeve in more than three different. positions. It is also possible to use two or more tools simultaneously.
  • the contact part can be pressed to the conductor.
  • a tool can be used which is adjustable in relation to the axis of the conductor in the radial direction, and which rotates around the contact part.
  • the tool is pressed into the contact part in the radial direction. As a result, it produces a circumferential groove in the contact part.
  • FIG. 1 shows a cup-like contact part and the end of an electrical conductor composed of individual wires, illustrated separately from each other.
  • FIG. 2 shows the end of the conductor surrounded by the contact part of FIG. 1 , together with the schematically illustrated tool.
  • FIG. 3 shows the conductor end with a tool penetrating the contact part.
  • FIGS. 4 and 5 show embodiments of the conductor end deviating from FIG. 3 .
  • FIG. 6 shows the end of a tool usable in the method.
  • FIGS. 7 to 9 show different embodiments modified as compared to FIG. 6 .
  • the method according to the invention is a welding method, wherein the increased temperature required for welding is produced by friction.
  • the method can also be called “friction stir welding” and has the effect that the aluminum of the conductor integrally connects with the copper of the contact part at a temperature that is lower than the welding temperature, caused also by the pressure applied by the tool and the deformation work applied as a result. Consequently, the tool applied in this manner has correspondingly a friction surface by means of which it can be pressed against the contact part with sustained pressure, or is pressed into the wall of the contact part.
  • the friction surface must be constructed in such a way that the wall of the contact part is not damaged during operation of the tool and in particular does not break through.
  • a protrusion can protrude from the end face of the tool which serves as the friction surface, wherein the protrusion can be arranged symmetrically or asymmetrically relative to the axis of rotation of the tool.
  • the tool with the protrusion only one symmetrically arranged protrusion is taken into consideration.
  • a tool is also illustrated in the drawings.
  • the tool can also be arranged without protrusion. It is placed against the contact part at the beginning of the process and is continuously moved during its rotation in the direction toward the contact part, so that it continuously rests under pressure against the contact part. As already mentioned in a preferred embodiment, it may already have been placed in rotation prior to the contact with the contact part.
  • FIG. 1 a sectional view through a contact part K and the end of a conductor are illustrated.
  • the contact part K is composed of copper or a copper alloy. In the following it will only be referred to as “contact part.”
  • the conductor consists of a plurality of individual wires of aluminum or of an aluminum alloy. It is in the following merely called “conductor.”
  • the contact part K is constructed cup-shaped. It has a bottom 1 and a single piece cylindrical sleeve 2 connected thereto and protruding from the bottom.
  • the contact part K may be equipped with a connection element 3 for providing for downstream conductors.
  • the connecting element 3 can, as illustrated in the drawing, protrude in the radial direction from the contact part K. However, it may also be arranged so as to extend in the axial direction past the contact part.
  • the conductor 4 consists of a plurality of individual wires which, for example, have already been stranded together. It is surrounded by an insulation 5 which is removed at the end of the conductor 4 , so that the individual wires are exposed.
  • the contact part K is pushed onto the conductor 4 until its end face rests against the bottom I of the contact part K, in accordance with FIG. 2 .
  • the sleeve 2 of the contact part K is dimensioned in such a way that it rests tightly against the conductor 4 and tightly contacts the same.
  • a tool 6 is then placed against the contact part K which is constructed with a pin-like protrusion 7 .
  • the tool 6 preferably is of steel. It must be in all cases harder than the material of the contact part K. Possible shapes of the tool 6 are explained in connection with FIGS. 7 to 9 .
  • the bottom 1 of the contact part K is heated through friction.
  • the contact part K is pressed together with the conductor 4 , or is held in position by the holding device which acts from outside.
  • the tool 6 When carrying out the method, for example, by means of an electrical motor, the tool 6 is rotated about its axis A and is subsequently moved in the direction of the arrow P. It is subsequently pressed with sustained pressure against the bottom 1 of the contact part K, so that the material thereof is heated by friction. This heating is transferred from the contact part K to the conductor 4 which rests with its end face on the bottom 1 .
  • the method is carried out at a sufficient rate of rotation of the tool 6 until the material of the conductor 4 has changed over into a doughy state, so that it integrally connects to the contact part K or is welded thereto by diffusion.
  • the appropriate temperature is below 500° C., i.e. relatively well below the melting temperature of aluminum which is about 658° C.
  • the rate of rotation of the tool 6 is, for example, 3,000 rotations per minute.
  • the tool 6 is pressed, for example, with a feed of 150 mm per minute against the contact part K and is moved on average about 0.15 mm.
  • the duration of the method advantageously is between 0.5 and 5.0 seconds.
  • the material of the bottom 1 of the contact part K is plasticized and deformed at the indicated temperature. Therefore, the bottom 1 of the contact part K is pressed by the tool 6 and particularly the projection 7 without breaking its wall into the conductor 4 , as it is illustrated schematically in FIG. 3 . As a result, it receives a dent located in the conductor 4 with an increased surface area as compared to the planar bottom, and correspondingly increased contact surface as compared to conductor 4 .
  • the contact part K can be held in position by means of a holding device which acts from the outside, as only schematically illustrated in FIG. 3 . It particularly prevents a rotation of the contact part K on the conductor 4 .
  • the contact part K can also or additionally be processed in the area of its sleeve 2 by means of a tool 6 in the described sense.
  • the tool 6 according to FIG. 4 , is placed against the sleeve 2 in the radial direction.
  • the temperature is raised by friction between the tool 6 and the sleeve 2 to such an extent until the above described connection or welding between sleeve 2 and conductor 4 is achieved.
  • the sleeve 2 is processed in the above described sense at three locations which are offset in the circumferential direction by 120°. However, it may also be more than three sides which are randomly distributed over the circumferential surface of the sleeve 2 .
  • the conductor 4 can also be rotated with a contact part K attached fixedly and non-rotatably thereto. Also, below the tool 6 with protrusion 7 the conductor 4 can be rotated about its axis B, namely in accordance with the schematic illustration in FIG. 5 .
  • the rotation of the conductor 4 takes place advantageously about at most 360°, for example, with continuously changing direction of rotation.
  • FIG. 6 A possible embodiment of the tool 6 can be seen in FIG. 6 . It has a preferably cylindrical bolt 10 with a circular cross section and a planar end face 11 extending perpendicularly to its axis A.
  • the bolt 10 could also have a polygonal cross section.
  • the end face 11 is the friction surface of the tool 6 resting against the contact part K.
  • the bolt 10 of the tool 6 has an increased friction surface due to the protrusion 7 protruding from its end face 11 .
  • the radial dimensions of the protrusion 7 are smaller than the radial dimensions of the bolt 10 .
  • the protrusion 7 may be constructed cylindrically. At its free end it can also be provided with a chamfer or it may be rounded.
  • the protrusion 7 can also be constructed conically with a decreasing diameter pointing away from the bolt 10 .
  • the protrusion 7 may additionally be provided with a thread.
  • FIG. 9 Another embodiment of the protrusion 7 is illustrated in FIG. 9 . Consequently, the protrusion 7 is constructed so as to extend at an acute angle Lacing away from the bottom 10 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
US14/087,146 2012-11-23 2013-11-22 Method for electrically conductively connecting a contact piece to an electrical conductor, and corresponding arrangement Abandoned US20140144015A1 (en)

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US14/831,413 US10404025B2 (en) 2012-11-23 2015-08-20 Arrangement for electrically conductively connecting a contact piece to an electrical connector

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EP12306457 2012-11-23
EP12306457.8 2012-11-23
EP13182307.2 2013-08-30
EP13182307.2A EP2735397B1 (de) 2012-11-23 2013-08-30 Verfahren zum elektrisch leitenden Verbinden eines Kontaktteils mit einem elektrischen Leiter

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US14/831,413 Active US10404025B2 (en) 2012-11-23 2015-08-20 Arrangement for electrically conductively connecting a contact piece to an electrical connector

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KR20200010088A (ko) * 2018-07-20 2020-01-30 티이 커넥티버티 저머니 게엠베하 ２ 개 이상의 전기 전도체들을 결합하기 위한 방법, ２ 개 이상의 전기 전도체들을 결합하기 위한 디바이스, 및 ２ 개 이상의 전도체들간의 전기 연결
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US9855623B2 (en) 2013-04-04 2018-01-02 Telsonic Holding Ag Method for connecting a tubular cable lug to a strand produced from aluminium
US20160233637A1 (en) * 2015-02-11 2016-08-11 Md Elektronik Gmbh Method and device for producing a cable and cable produced by the method
US9997885B2 (en) * 2015-02-11 2018-06-12 Md Elektronik Gmbh Method and device for producing a cable and cable produced by the method
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CN109841968A (zh) * 2017-11-24 2019-06-04 矢崎总业株式会社 端子连接方法
US11011902B2 (en) * 2017-12-27 2021-05-18 Lisa Draexlmaier Gmbh Line connector, electrical line assembly and production process for an electrical connection
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JP2020037132A (ja) * 2018-07-20 2020-03-12 ティーイー コネクティビティ ジャーマニー ゲゼルシャフト ミット ベシュレンクテル ハフツンクＴＥ Ｃｏｎｎｅｃｔｉｖｉｔｙ Ｇｅｒｍａｎｙ ＧｍｂＨ ２つ以上の電気導体を接合する方法、２つ以上の電気導体を接合するデバイス、および２つ以上の導体間の電気接続部
KR20200010088A (ko) * 2018-07-20 2020-01-30 티이 커넥티버티 저머니 게엠베하 ２ 개 이상의 전기 전도체들을 결합하기 위한 방법, ２ 개 이상의 전기 전도체들을 결합하기 위한 디바이스, 및 ２ 개 이상의 전도체들간의 전기 연결
JP7399637B2 (ja) 2018-07-20 2023-12-18 ティーイー コネクティビティ ジャーマニー ゲゼルシャフト ミット ベシュレンクテル ハフツンク ２つ以上の電気導体を接合する方法、２つ以上の電気導体を接合するデバイス、および２つ以上の導体間の電気接続部
KR102826549B1 (ko) * 2018-07-20 2025-06-26 티이 커넥티버티 저머니 게엠베하 ２개 이상의 전기 전도체들을 결합하기 위한 방법, ２개 이상의 전기 전도체들을 결합하기 위한 디바이스, 및 ２개 이상의 전도체들간의 전기 연결
US11394131B2 (en) * 2019-02-20 2022-07-19 Auto-Kabel Management Gmbh Electrical conductor and method for producing an electrical conductor
US11936152B2 (en) 2019-07-26 2024-03-19 Nexans Production of a planar connection between an electrical conductor and a contact piece
US10958005B1 (en) * 2020-01-31 2021-03-23 Dell Products L.P. Apparatus for direct cabled connection of fabric signals
JP2024078597A (ja) * 2022-11-30 2024-06-11 矢崎総業株式会社 端子付き電線の製造方法及び端子付き電線

Also Published As

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EP2735397B1 (de) 2018-01-17
US20170033473A1 (en) 2017-02-02
BR102013029981A2 (pt) 2014-09-23
US10404025B2 (en) 2019-09-03
EP2735397A1 (de) 2014-05-28

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