EP2192596B1 - Litze mit beschränkter Federwirkung - Google Patents

Litze mit beschränkter Federwirkung Download PDF

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Publication number
EP2192596B1
EP2192596B1 EP09171948A EP09171948A EP2192596B1 EP 2192596 B1 EP2192596 B1 EP 2192596B1 EP 09171948 A EP09171948 A EP 09171948A EP 09171948 A EP09171948 A EP 09171948A EP 2192596 B1 EP2192596 B1 EP 2192596B1
Authority
EP
European Patent Office
Prior art keywords
ppm
strand
alloy
test
content
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.)
Not-in-force
Application number
EP09171948A
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English (en)
French (fr)
Other versions
EP2192596A1 (de
Inventor
Francis Debladis
Stéphane Morice
Emilien Comoret
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.)
Nexans SA
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Nexans SA
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Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Publication of EP2192596A1 publication Critical patent/EP2192596A1/de
Application granted granted Critical
Publication of EP2192596B1 publication Critical patent/EP2192596B1/de
Not-in-force legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/026—Alloys based on copper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/003—Power cables including electrical control or communication wires

Definitions

  • the present invention relates to a strand comprising one or more electrical conductors, to an electric cable and to a wiring harness.
  • Such cables are conventionally formed by a plurality of electrical conductors (or strands) of copper. This plurality of wires is twisted to form a strand with a cross section of at most 0.5 mm 2 , and the strand is surrounded by an insulating sheath, obtained for example by extrusion.
  • These cables are used in various fields of the industry, such as for example the automotive industry, where they are assembled into bundles for the power supply of various equipment. These cables must thus be the lightest possible, and have a small footprint while maintaining good mechanical strength.
  • the copper used to make the alloy of electrical conductors B is commonly called CuOF for "Oxygen Free" Copper.
  • the electrical conductor wire A or B according to the invention advantageously has an improved 180 ° bending strength and thus limits the risk of breakage of the wire in handling operations. assemblies, transport, installations or uses.
  • the electrical conductor wire A or B according to the invention and therefore the respective strands resulting therefrom, have a very good electrical conductivity (IACS) at ambient temperature, this electrical conductivity being able to be of the order of 90%.
  • IACS electrical conductivity
  • ppm in the present description means “parts per million by weight”.
  • the quantity x (or the content) in ppm of a z element is expressed relative to the total weight of the alloy.
  • unavoidable impurities means the sum of the metallic or non-metallic elements included in the alloy, excluding copper, tin and oxygen, during the manufacture of said alloy. These impurities may be for example the following elements: Ag, As, Bi, Fe, Pb, S, Sb, Se, Te, Cd, Cr, Mn, P, Ni, Co, S, Fe and / or Zn.
  • heat treatment during the manufacture of the strand is understood to mean any conventional heat treatment that makes it possible to obtain an annealed state of the electrical conductor wire or wires. This treatment is to be differentiated from structural modifications related in particular to thermal aging when using the strands after their manufacture.
  • an annealing heat treatment causes a rearrangement of the microstructure of the alloy that makes up the electrical conductor wire (s), in particular the copper grains that make up the alloy have a size that increases after annealing. Therefore, the heat treatment during the manufacture of a strand inevitably induces a decrease in the mechanical strength of the alloy that makes up the electrical conductor wire (s).
  • the strand comprises several electrical conductors, these conductive son are twisted together. When the strand comprises only one electrical conductor wire, this single wire is not twisted.
  • the electrical conductor son or wires that make up the strand preferably have a diameter ranging from 0.10 to 0.67 mm.
  • the strand according to the invention is advantageously not compressed circularly.
  • the unavoidable impurities content, or sum of unavoidable impurities, in the alloy according to the invention, whether the electrical conductive wire A or the electrical conductor wire B, may be at most 65 ppm.
  • the tin content may be strictly greater than 1500 ppm (0.15% by weight), and preferably at least 1700 ppm (0.17% by weight).
  • the tin content may be furthermore at most 2200 ppm (0.22% by weight).
  • the oxygen content it can be at most 300 ppm (0.03% by weight).
  • the oxygen content may be at least 100 ppm, and more preferably at least 150 ppm (0.015% by weight).
  • the tin content may be at most 1000 ppm (0.1% by weight).
  • the tin content may be at least 800 ppm (0.08% by weight).
  • each electrical conductor wire is tinned, that is to say that it is covered with a thin metal layer of tin on its surface.
  • tinning improves the weldability of the electrical conductors.
  • Another object according to the invention is an electrical cable comprising a strand of one or more electrical conductor wires A or B, extending in the longitudinal direction of the cable, said strand being surrounded along the cable by an insulating sheath.
  • Another object according to the invention is a wiring harness comprising a plurality of electrical cables as defined above.
  • the figure 1 represents the tensile strength (MPa) as a function of the tin concentration (% by weight) of an alloy of Cu / Sn and a CuOF / Sn alloy respectively in the form of an electrical conductor wire and in the form of 'a strand of 7 electrical conductors.
  • the electrical conductor son according to the invention are conventionally manufactured from a casting of copper and tin, this casting being then rolled on the same production line.
  • the casting step for the manufacture of electrical conductors son B is carried out under vacuum.
  • the bar of copper / tin alloy thus obtained is drawn by a cold drawing operation for the purpose of transforming the metal bar into electrical conductor wires in successive passes through dies of smaller and smaller diameters.
  • the section reduction is generally done in two successive drawing operations.
  • the first drawing machine reduces the diameter of the wire to a value of 2.5 to 1.6 mm.
  • the second drawing machine reduces the wire to the final diameter, that is to say from 0.10 to 0.67 mm.
  • the electrical conductors son obtained are twisted to obtain a strand.
  • said strand may be surrounded by an insulating sheath of the electrically insulating polymeric layer type.
  • the contents of metallic elements in copper / tin alloys are conventionally determined using a spectrograph marketed by ARL under the reference Thermo Optec 3460.
  • the oxygen content of the alloys is conventionally determined using an oxygen analyzer marketed by LECO under the reference R0116.
  • the percent relaxation (%) is defined by the following formula: Relaxed diameter - Coiling diameter Coiling diameter x 100 wherein the winding diameter is the diameter of the mandrel, namely 20 mm.
  • the test is applicable over a range of electrical conductor wires with diameters from about 0.15 mm to about 0.51 mm.
  • drawn wire leads with a diameter of 0.202 mm were used.
  • the first end of a portion of electrical conductor wire is attached to a rigid rod having two longitudinal parallel faces and two longitudinal edges.
  • This rod is secured to a crank for rotating said rod on its longitudinal axis.
  • the second end of said portion is fixed to an axial stress (mass) of 85 g making it possible to maintain permanent contact the electrical conductor wire and the strip during the test.
  • the operating procedure of the 180 ° bend test is to rotate the crank 180 ° so that the electrical conductor wire wraps around the ruler by remaining in contact with both sides as well as with one of the two edges. longitudinal lines of the rod.
  • the stop of the rod makes it possible to bend the electrical conductor wire by 180 ° thanks to the mass suspended at the second end of said wire.
  • the electrical conductor thus folded is unfolded. This protocol is repeated on the same portion of folded wire until the wire breaks.
  • the average number obtained on the 12 electrical conductor wires (12 tests) according to the invention (Cu / Sn A1 alloy and CuOF / Sn B1 alloy) is greater than that obtained on the 12 electrical conductor wires according to the prior art (alloy Cu / Sn A2 and CuOF / Sn B2 alloy).
  • the electrical conductor wire according to the invention, and the resulting strand is much more resistant to mechanical stresses experienced by the son during handling, assembly, transportation, installation or use.
  • the mechanical strength decreases significantly from 0.15% by weight (1500 ppm) of tin in the Cu / Sn alloys and for of tin less than 0.15% by weight, and from 0.07-0.08% by weight (700-800 ppm) of tin in CuOF / Sn alloys and tin contents of less than 0.07% by weight.

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  • Conductive Materials (AREA)
  • Non-Insulated Conductors (AREA)

Claims (8)

  1. Litze mit einem Querschnitt von höchstens 0,35 mm2, die einen oder mehrere elektrische Leitungsdrähte (A) umfasst, dadurch gekennzeichnet, dass jeder elektrische Leitungsdraht aus einer Kupfer-Zinn-Legierung besteht, die umfasst:
    - einen Zinngehalt von mindestens 1500 ppm und höchstens 2500 ppm,
    - einen Sauerstoffgehalt von höchstens 400 ppm,
    - einen Gehalt an unvermeidbaren Unreinheiten von höchstens 100 ppm, und
    - wobei der Rest des Gehalts der Legierung Kupfer ist, wobei der/die elektrische/n Leitungsdraht/Leitungsdrähte bei der Herstellung der Litze nicht thermisch behandelt wird/werden.
  2. Litze nach Anspruch 1, dadurch gekennzeichnet, dass der Zinngehalt strikt über 1500 ppm ist.
  3. Litze nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Zinngehalt mindestens 1700 ppm ist.
  4. Litze nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Zinngehalt höchstens 2200 ppm ist.
  5. Litze mit einem Querschnitt von höchstens 0,35 mm2, die einen oder mehrere elektrische Leitungsdrähte (B) umfasst, dadurch gekennzeichnet, dass jeder elektrische Leitungsdraht aus einer Kupfer-Zinn-Legierung besteht, die umfasst:
    - einen Zinngehalt von mindestens 700 ppm und höchstens 1200 ppm,
    - einen Sauerstoffgehalt von höchstens 50 ppm, vorzugsweise von höchstens 5 ppm,
    - einen Gehalt an unvermeidbaren Unreinheiten von höchstens 100 ppm, und
    - wobei der Rest des Gehalts der Legierung Kupfer ist, wobei der/die elektrische/n Leitungsdraht/Leitungsdrähte bei der Herstellung der Litze nicht thermisch behandelt wird/werden.
  6. Litze nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Litze nicht kreisförmig komprimiert ist.
  7. Elektrisches Kabel, das eine Litze umfasst, so wie in den Ansprüchen 1 bis 6 definiert, die sich in Längsrichtung des Kabels erstreckt, wobei die Litze entlang des Kabels von einer Isolierhülle umgeben ist.
  8. Verkabelungsbündel, das eine Vielzahl elektrischer Kabel nach Anspruch 7 umfasst.
EP09171948A 2008-10-16 2009-10-01 Litze mit beschränkter Federwirkung Not-in-force EP2192596B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0857021A FR2937460A1 (fr) 2008-10-16 2008-10-16 Toron a effet ressort limite.

Publications (2)

Publication Number Publication Date
EP2192596A1 EP2192596A1 (de) 2010-06-02
EP2192596B1 true EP2192596B1 (de) 2011-07-06

Family

ID=40792586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09171948A Not-in-force EP2192596B1 (de) 2008-10-16 2009-10-01 Litze mit beschränkter Federwirkung

Country Status (6)

Country Link
US (1) US8552290B2 (de)
EP (1) EP2192596B1 (de)
KR (1) KR101594530B1 (de)
CN (1) CN101728006A (de)
AT (1) ATE515778T1 (de)
FR (1) FR2937460A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6134103B2 (ja) * 2012-06-01 2017-05-24 矢崎総業株式会社 絶縁電線の製造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233067A (en) * 1978-01-19 1980-11-11 Sumitomo Electric Industries, Ltd. Soft copper alloy conductors
JPS58177430A (ja) * 1982-04-12 1983-10-18 Furukawa Electric Co Ltd:The 導電用銅合金
FR2643388B1 (fr) * 1989-02-22 1991-05-03 Trefimetaux Alliages cusn desoxydes partiellement au mg- ou au ca- destines aux conducteurs electriques et/ou thermiques
US5149917A (en) * 1990-05-10 1992-09-22 Sumitomo Electric Industries, Ltd. Wire conductor for harness
JP2001234309A (ja) * 2000-02-16 2001-08-31 Hitachi Cable Ltd 極細銅合金撚線の製造方法
JP3948203B2 (ja) * 2000-10-13 2007-07-25 日立電線株式会社 銅合金線、銅合金撚線導体、同軸ケーブル、および銅合金線の製造方法
JP3719163B2 (ja) * 2001-05-25 2005-11-24 日立電線株式会社 可動部配線材用撚線導体及びそれを用いたケーブル
JP4479510B2 (ja) * 2005-01-17 2010-06-09 日立電線株式会社 銅合金導体及びそれを用いたトロリー線・ケーブル並びに銅合金導体の製造方法
US7544886B2 (en) * 2005-12-20 2009-06-09 Hitachi Cable, Ltd. Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, extra-fine insulated wire, coaxial cable, multicore cable and manufacturing method thereof

Also Published As

Publication number Publication date
FR2937460A1 (fr) 2010-04-23
US20100252301A1 (en) 2010-10-07
KR101594530B1 (ko) 2016-02-16
KR20100042609A (ko) 2010-04-26
ATE515778T1 (de) 2011-07-15
US8552290B2 (en) 2013-10-08
EP2192596A1 (de) 2010-06-02
CN101728006A (zh) 2010-06-09

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