US3911567A - Method of manufacturing an electric conductor of metal strips - Google Patents

Method of manufacturing an electric conductor of metal strips Download PDF

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Publication number
US3911567A
US3911567A US455112A US45511274A US3911567A US 3911567 A US3911567 A US 3911567A US 455112 A US455112 A US 455112A US 45511274 A US45511274 A US 45511274A US 3911567 A US3911567 A US 3911567A
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US
United States
Prior art keywords
bundle
strips
electric conductor
producing
locations
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
Application number
US455112A
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English (en)
Inventor
Peter Hofer
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.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
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
Priority claimed from CH500573A external-priority patent/CH554059A/de
Priority claimed from CH300174A external-priority patent/CH575642A5/de
Application filed by Georg Fischer AG filed Critical Georg Fischer AG
Application granted granted Critical
Publication of US3911567A publication Critical patent/US3911567A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/002—Joints between bus-bars for compensating thermal expansion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/02—Single bars, rods, wires, or strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H01H2001/5827—Laminated connections, i.e. the flexible conductor is composed of a plurality of thin flexible conducting layers
    • 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
    • Y10T29/49194—Assembling elongated conductors, e.g., splicing, etc.
    • Y10T29/49201—Assembling elongated conductors, e.g., splicing, etc. with overlapping orienting

Definitions

  • the present invention relates to an electric conductor comprised of metal sheets or bars, and particularly relates to such a conductor used for a thermalexpansion compensator or for a cooled bus bar.
  • the invention also relates to a method of manufacturing such a conductor.
  • a longitudinally self adjustable intermediate member in order to compensate for the thermal expansion of a rigid electric conductor, such as a bus bar or pipe cable, a longitudinally self adjustable intermediate member must be installed. This is comprised, for instance, of a flexible cable or of a package of bent metal sheets.
  • the strips lying on the outside of a bundle of strips are bent laterally outwardly to create air-passage ducts between the outside and inside strips and the strips are welded together where they meet.
  • a conductor comprised of a package of sheetmetal strips
  • aluminum or copper sheets of 0.3 1.5 mm. in thickness and about 40-150 mm. in width are used.
  • the sheets are connected, usually by welding, at both ends to solid metal plates that are of the same width as the sheets and are of the same material.
  • Such welding is very difficult, particularly in the case of aluminum, and in some cases can be effected only in the presence of an inert gas.
  • breaks in the sheets at the junction points frequently occur in operation.
  • Another known method for connection of the metal sheets to each other is based on the use of continuous metal sheets which are connected together at their end portions by means of rivets. This method has the disadvantage that the rivet connection between the individual sheets may fail to give a dependable electrical connection because of oxidation.
  • the present invention avoids the above discussed disadvantages by creating a longitudinally expansible conductor formed from a plurality of metal sheets or bars that are joined at at least two locations by explosion welding.
  • FIG. 1 is a schematic side view of a thermal compensator having a bundle of sheet-metal strips and plates welded to its two ends in accordance with the prior art
  • FIG. 2 is a schematic side view of a bundle of sheetmetal strips with interspersed spacer inserts before explosion welding in accordance with the invention
  • FIG. 3 is a schematic side view of a sheet-metal strip bundle with explosion-welded ends, in the form of a thermal-expansion compensator;
  • FIG. 4 is a schematic top view of the bundle of sheet metal strips shown in FIG. 3;
  • FIG. 5 is a schematic side view of a bus bar in which cooling ducts have been produced and which was formed by the method of the invention.
  • FIG. 6 is a schematic side view of an arrangement of metal sheets which are to be connected together by explosion welding and which are located in a pressing tool.
  • FIG. 1 shows a thermal compensator for a conductor, as known in the prior art.
  • This compensator is comprised of a bundle of sheet-metal strips 1. At the ends of the bundle, plates 3 and 4 are welded at weld seams 6 and 7. The bundle of sheet-metal strips 1 have compensation fold 9 in the region of their center in order to permit thermal expansion.
  • Thermal-expansion compensators or subdivided bus bars made from bundles of sheet-metal strips use aluminum, copper or some other relatively inexpensive metal which is a good electric conductor.
  • the thickness of the metal sheets for compensators is preferably 0.3 to 1.5 mm. and for subdivided bus bars, cooling bodies, and the like, the thickness is preferably 1 to 10 mm.
  • the sheet width is normally within the range of 40 to 150 mm., or more, and the sheet length varies within the range of to 700 mm. or even longer for subdivided bus bars.
  • the sheets for the compensators are normally cut from larger, flat sheet-metal panels of a length, for instance, of 2 m. and of a width for instance, of 50 cm.
  • sheet metal strips 14, also referred to as conductive sheets, are stacked in a bundle 12. This is advantageously effected in an apparatus which is provided with stops.
  • sheet 16 made, for instance, of steel or plastic. Spacer: 16 do not extend out to the ends of strips 14 but are ar ranged in the central region of the strips. Thus, strip: 14 extend beyond the spacers 16 at both ends.
  • the spacers are of unequa length and their lengths increase toward one side of th bundle or, for a symmetrical development, they in crease from the top and bottom of the bundle towart the center.
  • Conductive sheets 14 should extend paralle to each other at their free ends, or at least they shoul not contact each other over their entire free or unsup ported portions. It is necessary to have uniform spacin; of the sheet-metal strips 14 upon the subsequent explo sion welding. To assure this spacing, the ends of th strips are separated by spacers 15, a plurality of whicl together form a comb.
  • a comb may be made of stee so that it might be reused, or it may be made of inex pensive and disposable material, for instance plastic.
  • Bundle 12 of metal strips which has been prepared in the above manner, is introduced into a suitable pressing tool, for instance, the bipartite tool, 41, 51 indicated in dashed lines.
  • a compensation fold like the fold shown in FIG. 3, is produced and maintained.
  • the ends of the bundle of sheetmetal strips are converted by explosion welding by explosive charges 44, indicated in dashed line in FIG. 2, into compact plates, 26, 27 as shown in FIG. 3.
  • Compensator 22 of FIG. 3 is formed of sheet-metal strips 24. The ends of the strips are welded together by explosion welding to form plates 26 and 27.
  • the explosion welding can be effected at each end of a compensator individually, or by the application and detonation of an explosive charge 44 on only one side of strips 24, or by explosion on both sides of the bundle of strips 24.
  • detonation of all of the explosive charges 44 must occur simultaneously. Detonation can be effected via a fuse leading to detonator caps.
  • the corresponding pressing tool which holds the strips prior to welding, protects them from damage in the explosion. However, if the bundle of sheet metal strips does not have a compensation fold at the time of the explosion, such protection by a pressing tool is not always necessary.
  • the press jaws preferably have fine transverse grooves. The grooves emboss the surfaces of the explosion welded body and assure good transmission of current after mounting.
  • the compensator is bulged outwardly or is compressed in its longitudinal direction to obtain the desired length, for instance, a particular length at a predetermined temperature.
  • edge bodies 30 of metal or plastic and having a rectangular profile are pushed against the side edge surfaces of the sheet metal strips in the bundle, as shown in dashed line in FIG. 4.
  • the edge bodies must be of approximately the same thickness as the bundle of sheet-metal strips after the explosion welding. The edge bodies are thrown off by the welding explosion.
  • FIG. 5 shows a cooled tripartiteor three layer conductor bar 33 having two cooling ducts 35 and 36 between the individual layers 38, 39 and 40 of bar 33.
  • the individual layers are connected on both sides of the cooling ducts 35 and 36 by explosion welding, according to the process described above.
  • FIG. 6 shows means for forming a plurality of stacked metal panels into a plurality of compensators.
  • the bottom of a pressing tool is shown. It is developed from a solid steel piece. Its length and width correspond to the length and width of the sheet metal panels to be welded together, for instance 500 X 200 mm
  • On element 41 is placed plastic plate 46, which protrudes beyond both sides of the pressing tool.
  • On the bottom side of the tool along both sides of bottom part 41 are arranged explosive charges 44. These extend over the entire length of plastic plate 46, for instance, 2 m.
  • plastic plate 46 On plastic plate 46 lies a first sheet metal panel 48, made, for instance, of aluminum, which protrudes on both sides beyond pressing tool part 41 by the same distance as plastic plate 46.
  • Metal panel 48 is followed by plastic plate spacer 49 corresponding in width to tool part 41.
  • On plate 49 rests another aluminum panel 48 of the same width as the first.
  • up to 50 sheet-metal panels are stacked alternatingly with plastic plates 49.
  • the uppermost sheet metal panel 48 is followed by a plastic plate 46, corresponding to lowermost plate 46.
  • Above upper plate 46 are two explosive charges 44 similar to the two bottom explosive charges 44.
  • a top tool part 51 made from steel is applied. Bottom part 41 and top part 51, which together form the tool, are forced together, by means of tie rods (not shown) located, for instance, at the four comers of the bottom and top parts 41, 51.
  • spacer pieces or sheets 52 formed, for example, of pieces of spring steel between panels 48. These inserts extend along the entire length of panels 48 and are located along approximately the central longitudinal axes of the upper and lower explosive charges 44.
  • Sheetmetal spacer sheets 52 are replaced just before the detonation of charges 44 by a quick-setting frangible composition, for instance plaster of paris, which is applied between the sheet-metal panels to form fastening bridge 54. After the application of fastening bridge 54, sheet metal spacer sheets 52 are removed. Then the charges 44 are detonated. Welding of the aluminum sheets 48 occurs in the region between the opposing upper and lower explosive charges 44.
  • the compensation fold is now shaped or pressed in a bipartite pressing tool.
  • the two welded ends are provided correspondingly with transverse grooves in order to make the contact surfaces more adherent.
  • plastic spacer plates 49 are removed through the open side edges of the completed compensator.
  • Method for producing an electric conductor comprising:
  • each explosive charge is placed on at least one of the sides of the bundle at one of the respective locations therefor; and the explosive charges being all detonated simultaneously.

Landscapes

  • Pressure Welding/Diffusion-Bonding (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Non-Insulated Conductors (AREA)
US455112A 1973-04-06 1974-03-27 Method of manufacturing an electric conductor of metal strips Expired - Lifetime US3911567A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH500573A CH554059A (de) 1973-04-06 1973-04-06 Aus blechstreifen zusammengesetzter elektrischer leiter und verfahren zu dessen herstellung.
CH300174A CH575642A5 (ja) 1974-03-04 1974-03-04

Publications (1)

Publication Number Publication Date
US3911567A true US3911567A (en) 1975-10-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
US455112A Expired - Lifetime US3911567A (en) 1973-04-06 1974-03-27 Method of manufacturing an electric conductor of metal strips

Country Status (6)

Country Link
US (1) US3911567A (ja)
JP (1) JPS5030074A (ja)
AT (1) AT344812B (ja)
DE (2) DE2415949A1 (ja)
FR (1) FR2224845B1 (ja)
GB (1) GB1468533A (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0695012A1 (de) * 1993-01-22 1996-01-31 KM Europa Metal Aktiengesellschaft Verfahren zur Herstellung von flexiblen lamellierten Dehnungsbändern
EP0959546A1 (de) * 1998-05-22 1999-11-24 Cellpack Ag Flexibler Hochstromverbinder
FR2779878A1 (fr) * 1998-06-12 1999-12-17 Michel Pillet Dispositif d'amelioration de la deformabilite des conducteurs electriques pour circuits haute intensite
EP1020970A1 (en) * 1997-09-29 2000-07-19 Mitsubishi Denki Kabushiki Kaisha Switch gear
FR2819112A1 (fr) * 2001-01-04 2002-07-05 Labinal Barre conductrice et circuit de distribution de puissance la comportant
US20040200419A1 (en) * 2003-04-11 2004-10-14 Justin Mauck Explosion welded design for cooling components
WO2010037410A1 (en) * 2008-10-03 2010-04-08 Abb Technology Ag Laminated connector
US20110121059A1 (en) * 2008-05-09 2011-05-26 Manfred Reinold Electrical bond connection system
US20170077686A1 (en) * 2014-03-10 2017-03-16 Abb Schweiz Ag Device for high frequency current damping
CN108766626A (zh) * 2018-04-16 2018-11-06 江苏大学 一种铜排
EP3702219A1 (de) * 2019-02-27 2020-09-02 Lisa Dräxlmaier GmbH Längenausgleichselement für einen stromschienenverbund, stromschienenverbund und verfahren zum herstellen eines stromschienenverbunds
US11225207B2 (en) * 2019-09-27 2022-01-18 Yazaki Corporation Vehicle circuit body

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063483A (ja) * 1973-10-09 1975-05-29
DE2813635C2 (de) * 1978-03-30 1983-05-05 Theodor Wuppermann Gmbh, 5090 Leverkusen Verfahren und Einrichtung zur Herstellung von Profilen, Hohlkörpern u.dgl. aus mehreren metallenen Streifen konstanter Dicke
DE3331528A1 (de) * 1983-09-01 1985-04-04 Hans Flohe GmbH & Co, 4620 Castrop-Rauxel Dehnungsband (dehnverbinder)
DE10134515B4 (de) * 2001-07-16 2004-05-06 W.E.T. Automotive Systems Ag Leitereinrichtung mit einem eine Verengung aufweisenden flächigen Hauptleiter
JP4135870B2 (ja) * 2002-04-16 2008-08-20 株式会社日立製作所 真空スイッチ
DE102009033370B4 (de) 2009-07-16 2011-12-15 Taller Gmbh Stromschiene mit Kompensationsabschnitt
US9889806B2 (en) * 2013-10-21 2018-02-13 GM Global Technology Operations LLC Light weight bus bars, methods of manufacture thereof and articles comprising the same
CN106532399A (zh) * 2016-12-11 2017-03-22 宜兴市张渚中等专业学校 一种紫铜皮补偿器加工装置
US10285301B1 (en) * 2018-04-23 2019-05-07 Dell Products, L.P. Multi-axis alignment enclosure system for wall-mounted power delivery system
DE102019206276A1 (de) * 2019-05-02 2020-11-05 Robert Bosch Gmbh Federnd ausgebildete Stromschiene
BR102020003216A2 (pt) * 2020-02-14 2021-08-31 Melquisedec Francisquini Barramento condutor tubular senoidal

Citations (9)

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Publication number Priority date Publication date Assignee Title
US1157603A (en) * 1912-08-28 1915-10-19 American Steel & Wire Co Rail-bond.
US1995616A (en) * 1932-04-30 1935-03-26 American Brass Co Connection for joining sections of range boiler and pressure vessels and method of making
US2288348A (en) * 1940-06-10 1942-06-30 Russell A Funk Welding equipment
US2983898A (en) * 1957-10-04 1961-05-09 Malco Mfg Co Terminal wire crimp and method for forming same
US3344510A (en) * 1963-02-21 1967-10-03 Asahi Chemical Ind Line welding method for metals by explosives
US3449819A (en) * 1968-05-17 1969-06-17 Hexcel Corp Explosively welded honeycomb method
US3543388A (en) * 1967-12-29 1970-12-01 Hexcel Corp Controlled area explosive bonding
US3623197A (en) * 1970-03-27 1971-11-30 Gen Electric Electrostatic deflection electrode system for electron beam device having an array of lenses
US3728780A (en) * 1970-01-24 1973-04-24 Inst Science And Technology Explosive cladding on geometrically non-uniform metal material

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1157603A (en) * 1912-08-28 1915-10-19 American Steel & Wire Co Rail-bond.
US1995616A (en) * 1932-04-30 1935-03-26 American Brass Co Connection for joining sections of range boiler and pressure vessels and method of making
US2288348A (en) * 1940-06-10 1942-06-30 Russell A Funk Welding equipment
US2983898A (en) * 1957-10-04 1961-05-09 Malco Mfg Co Terminal wire crimp and method for forming same
US3344510A (en) * 1963-02-21 1967-10-03 Asahi Chemical Ind Line welding method for metals by explosives
US3543388A (en) * 1967-12-29 1970-12-01 Hexcel Corp Controlled area explosive bonding
US3449819A (en) * 1968-05-17 1969-06-17 Hexcel Corp Explosively welded honeycomb method
US3728780A (en) * 1970-01-24 1973-04-24 Inst Science And Technology Explosive cladding on geometrically non-uniform metal material
US3623197A (en) * 1970-03-27 1971-11-30 Gen Electric Electrostatic deflection electrode system for electron beam device having an array of lenses

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0695012A1 (de) * 1993-01-22 1996-01-31 KM Europa Metal Aktiengesellschaft Verfahren zur Herstellung von flexiblen lamellierten Dehnungsbändern
EP1020970A1 (en) * 1997-09-29 2000-07-19 Mitsubishi Denki Kabushiki Kaisha Switch gear
EP1020970A4 (en) * 1997-09-29 2002-08-21 Mitsubishi Electric Corp SWITCHING APPARATUS
EP0959546A1 (de) * 1998-05-22 1999-11-24 Cellpack Ag Flexibler Hochstromverbinder
FR2779878A1 (fr) * 1998-06-12 1999-12-17 Michel Pillet Dispositif d'amelioration de la deformabilite des conducteurs electriques pour circuits haute intensite
FR2819112A1 (fr) * 2001-01-04 2002-07-05 Labinal Barre conductrice et circuit de distribution de puissance la comportant
US20040200419A1 (en) * 2003-04-11 2004-10-14 Justin Mauck Explosion welded design for cooling components
US6953143B2 (en) * 2003-04-11 2005-10-11 Advanced Energy Industries, Inc. Explosion welded design for cooling components
US8181845B2 (en) 2008-05-09 2012-05-22 Robert Bosch Gmbh Electrical bond connection system
US20110121059A1 (en) * 2008-05-09 2011-05-26 Manfred Reinold Electrical bond connection system
WO2010037410A1 (en) * 2008-10-03 2010-04-08 Abb Technology Ag Laminated connector
US20170077686A1 (en) * 2014-03-10 2017-03-16 Abb Schweiz Ag Device for high frequency current damping
US9667043B2 (en) * 2014-03-10 2017-05-30 Abb Schweiz Ag Device for high frequency current damping
CN108766626A (zh) * 2018-04-16 2018-11-06 江苏大学 一种铜排
EP3702219A1 (de) * 2019-02-27 2020-09-02 Lisa Dräxlmaier GmbH Längenausgleichselement für einen stromschienenverbund, stromschienenverbund und verfahren zum herstellen eines stromschienenverbunds
US11225207B2 (en) * 2019-09-27 2022-01-18 Yazaki Corporation Vehicle circuit body
JP7116031B2 (ja) 2019-09-27 2022-08-09 矢崎総業株式会社 車両用回路体、及び、車両用回路体の配索構造

Also Published As

Publication number Publication date
JPS5030074A (ja) 1975-03-26
FR2224845A1 (ja) 1974-10-31
FR2224845B1 (ja) 1978-12-01
GB1468533A (en) 1977-03-30
AT344812B (de) 1978-08-10
ATA261174A (de) 1977-12-15
DE2415949A1 (de) 1974-10-17
DE7411531U (de) 1975-05-07

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