US3777361A - Method of producing clad wire - Google Patents

Method of producing clad wire Download PDF

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Publication number
US3777361A
US3777361A US00277892A US3777361DA US3777361A US 3777361 A US3777361 A US 3777361A US 00277892 A US00277892 A US 00277892A US 3777361D A US3777361D A US 3777361DA US 3777361 A US3777361 A US 3777361A
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United States
Prior art keywords
sheathing
copper
continuously
aluminum
lock seam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00277892A
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English (en)
Inventor
F Fuchs
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AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
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Publication of US3777361A publication Critical patent/US3777361A/en
Assigned to AT & T TECHNOLOGIES, INC., reassignment AT & T TECHNOLOGIES, INC., CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE JAN. 3,1984 Assignors: WESTERN ELECTRIC COMPANY, INCORPORATED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B23K20/001—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by extrusion or drawing

Definitions

  • ABSTRACT Aluminum rod of indefinite length is wrapped with a copper sheathing having a longitudinal lock seam and is then passed through hydrostatic extrusion apparatus. The heat and pressure of the extrusion process bond the copper to the aluminum and weld the lock seam as the copper-sheathed aluminum rod is extruded to produce copper clad aluminum wire of indefinite length. Materials other than copper and aluminum may be employed in the practice of the present invention.
  • This invention relates, broadly speaking, to a method for producing clad wire. More specifically, this invention relates to a method wherein a metallic (e.g., aluminum) rod is continuously clad with a metallic (e.g., copper) sheathing, and the clad rod is then continuously extruded to produce clad wire.
  • a metallic e.g., aluminum
  • a metallic e.g., copper
  • copperclad aluminum wire has been recognized as having more desirable properties than are offered by solid copper wire and solid aluminum wire.
  • copper-clad aluminum wire has a lower specific weight and is much less expensive inasmuch as aluminum is cheaper than copper on a weight basis.
  • copper: clad aluminum wire is a better conductor of electricity.
  • U. S. Pat. No. 3,408,727 (1968) to Dion discloses a method for continuously cladding with copper an aluminum wire core of indefinite length. Opposed rotating rolls, each provided with a semicircular groove, the said grooves facing each other, draw the aluminum wire core and two flat copper strips surrounding the aluminum wire core through the grooves whereupon each copper strip is curved around half the surface of the aluminum wire core and is bonded in the solid phase thereto. The copper strips meet along the two sides of the aluminum wire core and produce longitudinal flashings of copper which are unacceptable in the finished product and which therefore must be removed in a subsequent finishing operation.
  • U. S. Pat. No. 3,648,356 (1972) to Ziemek discloses a method for continuously cladding aluminum rod with copper. Copper tape from r a roll is continuously wrapped around the aluminum rod and the meeting longitudinal edges of the copper wrapping are welded in a protective gas atmosphere before the copper-clad aluminum rod is passed through a die to produce copper-clad aluminum wire. The need for welding adds to the expense of the operation.
  • One of the objects of this invention is to provide an improved method for producing clad wire.
  • Another of the objects of this invention is to provide an improved method for continuously sheathing a metallic (e.g., aluminum) rod ofindefinite length with another metallic (e.g., copper) covering and continuously extruding the sheathed rod to produce clad wire of indefinite length.
  • a metallic e.g., aluminum
  • another metallic e.g., copper
  • a metallic (e.g., copper) sheathing to a metallic (e.g., aluminum) rod, the sheathing having formed therein a lock seam running longitudinally of the rod and having an overall thickness equal to the thickness of the sheathing, the sheathed rod being continuously extruded to reduce the transverse cross-section thereof to the cross-section of the desired clad rod, the heat and pressure of the extrusion operation bonding the two metals together and welding the lock seam.
  • FIG. 1 represents a view, partially diagrammatic, showing a metallic (e.g., aluminum rod of indefinite length being sheathed by a metallic (e.g., copper) tape or strip of indefinite length and extruded to produce clad wire (e.g., copper-clad aluminum wire) of indefinite length.
  • a metallic e.g., aluminum rod of indefinite length
  • a metallic e.g., copper
  • clad wire e.g., copper-clad aluminum wire
  • FIG. 2 represents an enlarged partial transverse cross-section of the rod and sheathing, showing the lock seam.
  • FIG. 3 represents an enlarged transverse cross- I section of the clad wire.
  • flat metallic (e.g., copper) strip 3 of indefinite length is advanced past wire brush cleaner 4 indicated diagrammatically and in phantom in FIG. 1.
  • the metallic strip 3 may be continuously produced by rolling a metallic rod (not shown) of indefinite length.
  • Forming rolls 5 are of a design and construction which is well known to those familiar with the art, and no detailed description thereof is deemed necessary to a full and complete understanding of the present invention.
  • Forming rolls 5 continuously wrap the metallic strip 3 around the metallic rod 1 as a sheathing 6 with longitudinal lock seam 7 as indicated in FIG. 2. Those ends of the metallic strip 3 which form the lock seam 7 of sheathing 6 have been sufficiently reduced in thickness by the forming rolls 5 so that the overall thickness of the lock seam 7 is equal to the thickness of the metallic sheathing 6.
  • extruder 8 may be continuous hydrostatic extrusion apparatus of the type described in U. S. Pat. No. 3,667,267.
  • Lock seam 7 functions as a seal to prevent the infiltration of extrusion fluid between rod 1 and sheathing 6 in the extruder 8.
  • the metals are bonded to each other and lock seam 7 is welded under the heat and pressure generated in extruder 8 as the sheathed rod 1 passes through the die 9 to produce a composite wire 10 of indefinite length and having a metallic core '1 1 anda substantially' seamless metallic cladding l2 thereon.
  • a sizing die- 13 may be interposed between forming rolls 5 and extruder 8 to insure that sheathing 6 fits snugly on rod 1.
  • metallic rod 1 may be an aluminum rod 0.320 inch in diameter
  • metallic strip 3 may be a copper strip 0.020 inch thick. This would provide a copper cladding 12 of 0.001 inch thickness of 24 gauge wire.
  • the die stem stress (assuming the die stem has the same diameter as the rod) must be approximately 76,000 psi and the extrusion fluid pressure, as is commonly known to those familiar with-the art, will always be greater than this; moreover, the extrusion operation will raise the metal temperature to approximately 300 F above ambient.
  • the extrusion fluid pressure and the metal temperature in the foregoing example are well above the minimum pressure and temperature required to bond copper to aluminum and to weld a lock seam in 0.020 inch copper strip.
  • Method for producing a clad product comprising: I I
  • step (b) the first and second materials are bonded to each other.
  • Method for continuously producing a clad elongated product of indefinite length comprising:
  • step (d) the first and second metallic materials are bonded to each other.
  • Method for continuously producing copper-clad aluminum wire of indefinite length comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Extrusion Of Metal (AREA)
US00277892A 1972-08-04 1972-08-04 Method of producing clad wire Expired - Lifetime US3777361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27789272A 1972-08-04 1972-08-04

Publications (1)

Publication Number Publication Date
US3777361A true US3777361A (en) 1973-12-11

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Family Applications (1)

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US00277892A Expired - Lifetime US3777361A (en) 1972-08-04 1972-08-04 Method of producing clad wire

Country Status (7)

Country Link
US (1) US3777361A (it)
CA (1) CA969717A (it)
CH (1) CH563202A5 (it)
ES (1) ES417530A1 (it)
FR (1) FR2194496B1 (it)
GB (1) GB1413601A (it)
IT (1) IT1004543B (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567841A (en) * 1983-01-18 1986-02-04 Fathom Oceanology Limited Fairing assembly for towed underwater cables
US6053960A (en) * 1997-12-30 2000-04-25 Minerals Technologies, Inc. Method of manufacture of cored wire for treating molten metal
US6346135B1 (en) * 1998-12-10 2002-02-12 Minerals Technologies Inc. Cored wire for treating molten metal
US6428858B1 (en) 2001-01-25 2002-08-06 Jimmie Brooks Bolton Wire for thermal spraying system
US20080196926A1 (en) * 2007-02-17 2008-08-21 Kevin Yang Copper clad ballast wire
US20100294537A1 (en) * 2006-06-21 2010-11-25 Rh Innovation Method of producing an aluminium wire covered with a copper layer, and wire obtained
CN112466561A (zh) * 2020-11-18 2021-03-09 安徽聚虹电子有限公司 一种铜包铝复合线材的制作方法
CN113352019A (zh) * 2021-04-22 2021-09-07 东方日升新能源股份有限公司 铜铝复合焊带的制作方法及铜铝复合焊带和太阳能组件

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848323A1 (de) * 1998-10-20 2000-05-04 Wieland Edelmetalle Verfahren zur Herstellung eines Verbundmaterials und Verbundmaterial

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US910814A (en) * 1906-03-10 1909-01-26 Joseph F Kaufmann Covering metals.
US1571412A (en) * 1922-12-21 1926-02-02 Irvin Richard Method of producing sheet-metal pipe
US3282660A (en) * 1964-03-26 1966-11-01 Anaconda Wire & Cable Co High-temperature electrical conductor and method of making
US3434320A (en) * 1966-02-04 1969-03-25 Atomic Energy Authority Uk Hydrostatic extrusion apparatus
US3509617A (en) * 1968-02-28 1970-05-05 Olin Mathieson Cylindrical or rod-like composite article
US3604102A (en) * 1968-01-03 1971-09-14 Cnen Process for effecting metallurgical joints between two different metals and the products obtained thereby
US3631586A (en) * 1967-09-14 1972-01-04 British Insulated Callenders Manufacture of copper-clad aluminum rod
US3646796A (en) * 1968-09-28 1972-03-07 Hitachi Cable A process for the manufacturing of composite metal wire
US3654687A (en) * 1967-09-27 1972-04-11 Asea Ab Hydrostatic extrusion of compound material

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US910814A (en) * 1906-03-10 1909-01-26 Joseph F Kaufmann Covering metals.
US1571412A (en) * 1922-12-21 1926-02-02 Irvin Richard Method of producing sheet-metal pipe
US3282660A (en) * 1964-03-26 1966-11-01 Anaconda Wire & Cable Co High-temperature electrical conductor and method of making
US3434320A (en) * 1966-02-04 1969-03-25 Atomic Energy Authority Uk Hydrostatic extrusion apparatus
US3631586A (en) * 1967-09-14 1972-01-04 British Insulated Callenders Manufacture of copper-clad aluminum rod
US3654687A (en) * 1967-09-27 1972-04-11 Asea Ab Hydrostatic extrusion of compound material
US3604102A (en) * 1968-01-03 1971-09-14 Cnen Process for effecting metallurgical joints between two different metals and the products obtained thereby
US3509617A (en) * 1968-02-28 1970-05-05 Olin Mathieson Cylindrical or rod-like composite article
US3646796A (en) * 1968-09-28 1972-03-07 Hitachi Cable A process for the manufacturing of composite metal wire

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567841A (en) * 1983-01-18 1986-02-04 Fathom Oceanology Limited Fairing assembly for towed underwater cables
US6053960A (en) * 1997-12-30 2000-04-25 Minerals Technologies, Inc. Method of manufacture of cored wire for treating molten metal
US6280497B1 (en) * 1997-12-30 2001-08-28 Minerals Technologies Inc. Cored wire for treating molten metal and method of manufacture
US6346135B1 (en) * 1998-12-10 2002-02-12 Minerals Technologies Inc. Cored wire for treating molten metal
US6428858B1 (en) 2001-01-25 2002-08-06 Jimmie Brooks Bolton Wire for thermal spraying system
US6861612B2 (en) 2001-01-25 2005-03-01 Jimmie Brooks Bolton Methods for using a laser beam to apply wear-reducing material to tool joints
US20100294537A1 (en) * 2006-06-21 2010-11-25 Rh Innovation Method of producing an aluminium wire covered with a copper layer, and wire obtained
US20080196926A1 (en) * 2007-02-17 2008-08-21 Kevin Yang Copper clad ballast wire
CN112466561A (zh) * 2020-11-18 2021-03-09 安徽聚虹电子有限公司 一种铜包铝复合线材的制作方法
CN112466561B (zh) * 2020-11-18 2022-02-15 安徽聚虹电子有限公司 一种铜包铝复合线材的制作方法
CN113352019A (zh) * 2021-04-22 2021-09-07 东方日升新能源股份有限公司 铜铝复合焊带的制作方法及铜铝复合焊带和太阳能组件

Also Published As

Publication number Publication date
FR2194496A1 (it) 1974-03-01
ES417530A1 (es) 1976-05-16
CH563202A5 (it) 1975-06-30
FR2194496B1 (it) 1977-08-05
GB1413601A (en) 1975-11-12
CA969717A (en) 1975-06-24
IT1004543B (it) 1976-07-20

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AS Assignment

Owner name: AT & T TECHNOLOGIES, INC.,

Free format text: CHANGE OF NAME;ASSIGNOR:WESTERN ELECTRIC COMPANY, INCORPORATED;REEL/FRAME:004251/0868

Effective date: 19831229