EP1120797A1 - Drahtleiter-Herstellungsverfahren aus Verbundmaterial mit Kupfermatrix und hiermit hergestellter Drahtleiter - Google Patents

Drahtleiter-Herstellungsverfahren aus Verbundmaterial mit Kupfermatrix und hiermit hergestellter Drahtleiter Download PDF

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Publication number
EP1120797A1
EP1120797A1 EP01400151A EP01400151A EP1120797A1 EP 1120797 A1 EP1120797 A1 EP 1120797A1 EP 01400151 A EP01400151 A EP 01400151A EP 01400151 A EP01400151 A EP 01400151A EP 1120797 A1 EP1120797 A1 EP 1120797A1
Authority
EP
European Patent Office
Prior art keywords
wire
composite material
cable
base
silver
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.)
Granted
Application number
EP01400151A
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English (en)
French (fr)
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EP1120797B1 (de
Inventor
Ning Yu
Jean-Paul Le Roy
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.)
Axon Cable SA
Original Assignee
Axon Cable SA
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 Axon Cable SA filed Critical Axon Cable SA
Publication of EP1120797A1 publication Critical patent/EP1120797A1/de
Application granted granted Critical
Publication of EP1120797B1 publication Critical patent/EP1120797B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables

Definitions

  • the invention relates to a method for manufacturing a conductive wire. made of a copper matrix composite material in which metallic or ceramic particles are dispersed, and the wire conductor obtained from this process.
  • Copper is a widely used material, due to its high electrical conductivity, as a material constituting the conductive wire in electrical and electronic cables.
  • a copper alloy which, by different hardening mechanisms, has mechanical strength superior to copper, while having an electrical conductivity at less than 85% of the electrical conductivity of copper.
  • these alloys there may be mentioned Cu-Cd, Cu-Zr, Cu-Fe and Cu-Cd-Cr.
  • the object of the present invention is to provide a method of manufacturing allowing a conductive wire having a better electrical conductivity than prior art alloys, at the same time increased mechanical strength, especially in torsion and bending, as well as good stability at high temperature of these properties mechanical.
  • said ductile material belongs to the group including silver, gold, platinum, palladium and their alloys.
  • said particles contain aluminum oxide, preferably from 0.2 to 0.4% by weight composite material.
  • said coating step base wire includes electrolytic deposition of a layer silver with a thickness between 1 and 10 ⁇ m, preferably between 3 and 6 ⁇ m.
  • a favorable solution for the manufacturing technique provides that the wire drawing includes several passages in a cold multi-pass drawing to obtain a final diameter for the wire secondary at least five times smaller than the nominal wire diameter primary, preferably substantially ten times smaller.
  • the present invention also relates to a conducting wire as it results from the aforementioned manufacturing process, this thread being made of a composite material with a copper matrix in which are dispersed metallic or ceramic particles, this wire being characterized by that it further comprises a coating of ductile material and that it has an electrical conductivity at least equal to 92% of the electrical conductivity of copper (International Annealed Copper Standard).
  • the thread according to the present invention is characterized in that when a shielding braid electromagnetic cable is made with said conductive wire, when said cable is subjected to one million (1,000,000) bending cycles and combined torsion, each bending and torsion cycle corresponding to the passage of a section of cable relative to an initial position, on the one hand relative to a main direction of the cable from a 0 ° position, towards a position at + 140 °, towards a position at -140 ° and the return to the 0 ° position (torsion), and on the other hand with respect to a direction orthogonal to said main direction of the cable from a 0 ° position, to a position at + 140 °, towards a position at -140 ° and the return to the 0 ° position (bending), said braid has a maximum electrical resistance variation of 7%.
  • the conductive wire has a value of tensile strength greater than or equal to 300 Mpa.
  • said ductile material belongs to the group including silver, gold, platinum, palladium and their alloys.
  • the ductile material is a layer silver obtained electrolytically and said particles contain aluminum oxide, preferably 0.2 to 0.4% by weight of the material composite.
  • the method of manufacturing the conducting wire uses a basic wire made of a composite material with a copper matrix in which are dispersed metallic or ceramic particles.
  • the composite material used is therefore produced by powder metallurgy by dispersing homogeneous metallic or ceramic fine particles (for example example of oxides, carbides, nitrides or silicides) in a copper matrix.
  • the effect of these dispersed particles on the microstructure metallurgical copper allows, on the one hand, to increase the resistances mechanical properties of the material and, on the other hand, to maintain this mechanical strength up to high temperatures, without altering the electrical conductivity too much of the copper matrix.
  • the manufacturing process according to the present invention allows obtaining a conducting thread surprisingly having very high mechanical performance, electrical conductivity and resistance mechanical at high temperature.
  • the manufacturing method according to the present invention comprises basically three stages of processing the basic yarn made in the aforementioned composite material, namely successively silvering, wire drawing and annealing heat treatment.
  • GLIDCOP registered trademark sold by the company SCM Metal Products Inc. (UNS reference C15 715).
  • This composite material contains 0.25 to 0.35% by weight of aluminum oxide particles dispersed in the copper matrix and it has a maximum electrical conductivity equal to 92% of that of copper. The size of these particles is between 3 and 12 nanometers.
  • a 0.8 mm diameter base wire made of this material has been used as a starting point to develop a common thread according to the present invention.
  • the next step in the manufacturing process consists, in particular in order to avoid a break in the base wire during the subsequent passage in the cold drawing machine allowing the continuous reduction of the section of the base wire, to deposit a silver coating on the base wire, this coating preferably being produced electrolytically and with a thickness of 3 to 6 ⁇ m.
  • this step of coating the base wire by silver includes the following steps: alkaline degreasing of the wire base, rinsing with water of the base wire, acid pickling of the base wire, rinsing with base wire water, electrolytic deposition of a silver undercoat on the base wire, electrolytically depositing a layer of silver on the undercoat to form a primary wire, and rinse the primary wire with water.
  • This primary wire (silver wire) is then, in a second step, continuous wire drawing using a cold multi-pass wire drawing machine, the last channels used to reach a secondary thread with a final diameter of 0.106 mm, or 0.100 mm or 0.079 mm.
  • the silver coating remains continuous and homogeneous and results in a layer with a thickness of around 1 ⁇ m.
  • the last step of the manufacturing process consists of a heat treatment.
  • the purpose of this heat treatment is to restore the ductility of the composite material by reducing the internal stresses of the material created by the wire drawing stage.
  • this treatment thermal will consist of an annealing during which the secondary wire has been brought to a temperature between 450 and 520 ° C for a time between 150 and 210 min.
  • the conductive wire of Cu-Cd alloy has a loss of 20% of its tensile strength when the wire conductor according to the present invention exhibits only a loss in 5% breaking load. It therefore follows that the common thread from the manufacturing method according to the present invention exhibits better thermal resistance compared to a conductive wire of Cu-Cd alloy.
  • This cable 10 comprises one hundred and forty two coaxial conductors distributed within eight groups (reference 12) of sixteen coaxial cables and seven pairs (reference 14 of coaxial cables). All cables coaxial is twisted around a central anti-tearing fiber 16, all being wrapped in a ribbon 18 surrounded by the shielding braid 20, itself protected by an outer sheath 22 of plastic material.
  • the flexion aspect includes rotational movements with respect to a horizontal axis (X, X '), these movements being formed by the passage of sample 24 from a initial position 0 to position + 140 °, then its passage from position + 140 ° at the -140 ° position and finally its passage from the -140 ° position to the position initial 0.
  • the sample 24 crosses orthogonally a horizontal beam 26 driven in rotation (driving mechanism not shown) and which imposes the previously described movement back and forth in rotation (arrow A in Figure 2) around the horizontal axis (X, X ') which is parallel to the longitudinal direction of the beam 26.
  • the twist aspect includes rotational movements relative to an axis (Y, Y ') orthogonal to the axis horizontal (X, X ') above, these movements being constituted by the passage of sample 24 from an initial position 0 to the position + 140 °, then its passage from the + 140 ° position to the -140 ° position and finally its passage from the position -140 ° to the initial position 0.
  • a torsion module 28 crosses the beam 26 according to the axis (Y, Y ') by forming a pivot link, a section of the sample 24 being integrally housed inside the torsion module 28 according to the axis (Y, Y ').
  • a first end 24a of the section of the sample protrudes from a first sleeve 28a surrounded by a bracket 28a ', these two elements forming a first part of the module 28, and a second end 24b of the section of the sample protrudes by one second sleeve 28b forming a second part of module 28.
  • the sample 24 is entirely subjected to the movements of module 28, including the previously described back-and-forth movement rotating (arrows B in Figure 2) around the axis (Y, Y ') (mechanism rotational drive around (Y, Y ') not shown).
  • the sample 24 of the cable is completely free to move, therefore subject only to gravity. This test allows in particular to reconstruct the stresses to which a cable connected to a portable medical electrical device is subjected such as a probe.
  • the main thread resulting from the manufacturing process according to the present invention therefore appears to have greater mechanical resistance, combined with better thermal resistance, while having an electrical conductivity higher than the conductive wires of prior art.
  • the present invention also relates to a shielding braid electromagnetic for an electric cable, comprising at least one wire conductor as defined above.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Conductive Materials (AREA)
EP01400151A 2000-01-27 2001-01-19 Drahtleiter-Herstellungsverfahren aus Verbundmaterial mit Kupfermatrix und hiermit hergestellter Drahtleiter Expired - Lifetime EP1120797B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0001039A FR2804539B1 (fr) 2000-01-27 2000-01-27 Procede de fabrication d'un fil conducteur realise dans un materiau composite a matrice en cuivre et fil conducteur obtenu par ledit procede
FR0001039 2000-01-27

Publications (2)

Publication Number Publication Date
EP1120797A1 true EP1120797A1 (de) 2001-08-01
EP1120797B1 EP1120797B1 (de) 2005-07-27

Family

ID=8846368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400151A Expired - Lifetime EP1120797B1 (de) 2000-01-27 2001-01-19 Drahtleiter-Herstellungsverfahren aus Verbundmaterial mit Kupfermatrix und hiermit hergestellter Drahtleiter

Country Status (3)

Country Link
EP (1) EP1120797B1 (de)
DE (1) DE60112138T2 (de)
FR (1) FR2804539B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8656585B2 (en) 2006-05-09 2014-02-25 Kirwan Surgical Products Llc Process for manufacturing electrosurgical forceps with composite material tips

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640779A (en) * 1969-09-30 1972-02-08 Olin Corp High-conductivity copper alloys
US4427469A (en) * 1981-02-23 1984-01-24 Western Electric Co., Inc. Methods of and apparatus for controlling plastic-to-conductor adhesion of plastic-insulated, tinned conductors

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640779A (en) * 1969-09-30 1972-02-08 Olin Corp High-conductivity copper alloys
US4427469A (en) * 1981-02-23 1984-01-24 Western Electric Co., Inc. Methods of and apparatus for controlling plastic-to-conductor adhesion of plastic-insulated, tinned conductors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8656585B2 (en) 2006-05-09 2014-02-25 Kirwan Surgical Products Llc Process for manufacturing electrosurgical forceps with composite material tips

Also Published As

Publication number Publication date
DE60112138D1 (de) 2005-09-01
DE60112138T2 (de) 2006-04-13
EP1120797B1 (de) 2005-07-27
FR2804539A1 (fr) 2001-08-03
FR2804539B1 (fr) 2002-05-10

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