WO2008037714A1 - Câble et son embout étagé pour soudure par aluminothermie - Google Patents

Câble et son embout étagé pour soudure par aluminothermie Download PDF

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Publication number
WO2008037714A1
WO2008037714A1 PCT/EP2007/060163 EP2007060163W WO2008037714A1 WO 2008037714 A1 WO2008037714 A1 WO 2008037714A1 EP 2007060163 W EP2007060163 W EP 2007060163W WO 2008037714 A1 WO2008037714 A1 WO 2008037714A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
lug
cable
thermite
base metal
Prior art date
Application number
PCT/EP2007/060163
Other languages
English (en)
Inventor
Daisuke Funamizu
Hideki Nishijima
Original Assignee
The Furukawa Electric Co., Ltd.
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 The Furukawa Electric Co., Ltd. filed Critical The Furukawa Electric Co., Ltd.
Priority to JP2009528742A priority Critical patent/JP2010504217A/ja
Publication of WO2008037714A1 publication Critical patent/WO2008037714A1/fr

Links

Classifications

    • 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
    • B23K23/00—Alumino-thermic 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
    • H01R4/58—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
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • 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
    • B23K2101/26—Railway- or like rails
    • 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

Definitions

  • the present invention relates to a cable with lug for thermite welding, more specifically, a cable with lug for thermite welding employed with a conventional welding tool, which when conventionally compared, is capable of increasing the welded area of a base metal and cable with lug for thermite welding.
  • Thermite welding is welding in which a mixed powder of aluminum and copper oxide (or iron oxide) is ignited and combusted near the surface of a base metal, and a portion of the base metal and copper (or iron) is melted by the heat of a chemical reaction thereof.
  • the applications of thermite welding are mainly employed in railway fields in cases where two base metal rails are electrically connected to each other using a copper cable or the like, referred to as a bonding cable, and in cases where pipelines buried in the ground are connected.
  • FIG. 5 illustrates an aspect of thermite welding in which rails for a railway are thermite welded.
  • a special tool must be employed in order to thermite weld, and hereinafter, the special tool be referred to as a crucible, and the part which welds the base metal with the welding lug connected to the copper cable or the like at the portion constituting the crucible will be referred to as the welding jig.
  • the construction of a conventional crucible will be explained with reference to Figure 6 (a) .
  • Crucible 61 contains a combustion chamber 65 for containing a thermite material 62 and an ignition material 63 therewithin, igniting the ignition material 63 and combusting the abovementioned materials, a passageway 67 for channeling the molten thermite material 62 after combustion, an insertion portion 69 for inserting a welding lug connected to a cable, and a recess portion 68 into which the molten thermite material 62 from passageway 67 flows, in order to weld the welding lug to the base metal.
  • the recess portion 68 and insertion portion 69 have openings in surface 70.
  • the bottom of the combustion chamber is covered with a steel disc 64, with passageway 67 extending downward therefrom.
  • the thermite material 62 and the iginition material 63 with which it is covered are packed.
  • the cable connected to welding lug 71 is placed into insertion portion 69, by having a shape which is complimentary to the shape of insertion portion 69.
  • surface 70 and the surface of the welding lug 71 abut with the surface of the base metal (not shown) to seal recess portion 68.
  • surface 70 is flush with the surface of the welding lug 71.
  • the combustion reaction indicated below is started in the thermite material 62 (shown in the example of copper thermite welding) by igniting the ignition material 63, and the metallic elements constituting the thermite material 62 are melted, via the exothermic heat of the abovementioned reaction .
  • the steel disc 64 is also simultaneously melted, and the molten metal flows out downward through the passageway 67 and flows into the recess portion 68 from the passageway 67. Consequently, a portion of the welding lug and base metal are also melted within the recess portion 68
  • the welded portion (refer to 72 of FIG. 6 (c) ) is formed on the surface of the base metal with a portion of the welding lug (containing the cable inside) included inside, with the base metal 73 being fused to the welding lug 71 via welded portion 72.
  • the surface of the base metal, welding lug and welded portion after thermite welding, as seen from a side view is shown in Figure 6 (c) .
  • operations such as base metal polishing, preheating, removal of the post thermite welding crucible, slag removal, shaping, etc., are necessary. However, since these operations are common knowledge to those who are skilled in the art, a detailed explanation will be omitted.
  • Japanese Patent Publication No. 2005-7461 discloses such a welding method. DISCLOSURE OF THE INVENTION
  • FIG. 6 (c) The portion of the molten metal that is welded in the abovementioned conventional welding jig employed in thermite welding, is indicated in FIG. 6 (c) , in which with respect to the welding lug, region Z, as indicated by the dotted line, is roughly equivalent surface portion of the welding lug that is placed inside recess portion 68, and with respect to the surface of base metal 73, the inner opening portion of recess portion 68 in the surface 70 of crucible 61, excluding the weld lug, is region V.
  • the welded area of the base metal and welding lug is determined by the position at which welding lug 71 is placed inside of recess 68 before thermite welding, in order to maintain the balance between region V and region Z.
  • welding lugs of conventional cables with welding lugs normally, are generally fabricated out of copper and connected to the cable inserted inside the welding lugs via a crimping process. Therefore, for example, in cases where thermite welding is performed on rails for a railway using a cable with a copper lug in order to electrically connect two separated rails of a railway to each other, even though copper is high in malleability and ductility, since copper is not significantly high in strength, it is possible that a lug affected by an external force will break.
  • a cable with lug for thermite welding in which, when a welding lug connected to the cable is placed at a predetermined position of a welding jig at the time of thermite welding, at least a portion of the insertion portion in a lengthwise direction becomes flush with surface 70 of the welding jig, with the cable with lug for thermite welding being integrally formed with a first portion forming a sealed portion sealing a through passage to recess portion 68, and a second portion extending inside recess portion 68 from the end of the first portion, while being separated from surface 70 by a predetermined distance.
  • the inner space separating the insertion portion 69 and the surface of the base metal, or the space (W region) between the second portion and the surface of the base metal can also be welded. Furthermore, in order to solve the abovementioned problem (s) in cases where a copper lug is employed, a cable with welding lug is provided, in which the welding lug is made of iron, and integrally connected by crimping and processing, so that the cable inserted inside is in direct contact with the entire welding lug, and thereby, able to withstand external force.
  • the cable with lug for thermite welding of the present invention is thermite welded to a base metal via welded metal from solidification of a welding material that has flown in, using a welding jig provided with; a cavity having a first opening on the surface abutted with the surface of the base metal into which the welding material flows; and a recess portion communicating with the cavity portion and having second opening portion on the surface thereof abutted with the surface of the base metal, the cable having a conducting wire inserted inside, and comprising: a first portion having a shape such that the surface of the recess portion is in direct contact and flush with the surface of the second opening portion, which is at least partially in a lengthwise direction of the recess portion; a second portion extending from one end portion of the first portion to the inside of the cavity portion, which is separated by a predetermined distance from the surface of the first opening portion .
  • the cable with lug for thermite welding of the present invention may form a stepped portion by having the surface of the first portion flush with the surface of the second opening portion, and the surface of the second portion opposing the surface of the first opening portion .
  • the cable with lug for thermite welding of the present invention may be filled with the welded metal in the space between the surface of the base metal and the surface of the second portion, by thermite welding.
  • the welding lug of the cable of the present invention may be made of iron.
  • a cable with an iron lug for thermite welding is constructed to have, a first portion having a shape that is flush with the surface of the opening of the second opening portion and is in direct contact with the surface of the recess at least partially in the lengthwise direction of the recess of the abovementioned welding jig, and a second portion extending from one end of the first portion to the inside of the cavity, separated by a predetermined distance from the surface of the opening of the first opening portion, when thermite welding is performed, a welded portion, into which the thermite welding material in the space between the second portion and the surface of the base metal having mutually opposing predetermined spacing flows is formed, and as a result, the weld area of the cable with the iron lug for thermite welding and the base metal can be increased.
  • a first portion and a second portion form a stepped region.
  • This may be a process whereby, a cable is inserted inside a lug inner portion, crimping begins from a predetermined position of the lug together with the inner portion of the cable, and portions of increased and decreased thickness are formed, so that the cable with lug for thermite welding can be easily manufactured.
  • the welded area is increased as compared with that of conventional cables with welding lugs, and therefore, welding strength can be improved.
  • the welding lug since the welding lug is made of iron, the strength of the welding lug is improved, and therefore, the welding lug has the advantage of making breakage, etc. of the weld lug from external forces difficult, even if a portion has undergone plastic deformation by crimping and such.
  • FIG. 1 A perspective view of a cable with welding lug of the present invention
  • FIG. 2 A diagram of the cable with welding lug of the present invention placed in an insertion portion of a conventional crucible;
  • FIG. 3 A diagram of a side surface, showing a surface of the weld lug and a surface of the metal base which are connected via a welded portion after thermite welding of the present invention
  • FIG. 4 Another embodiment of the cable with the welding lug of the present invention.
  • FIG. 5 A diagram of thermite welding being performed on a rail for a railway; and [FIG. 6] (a) is a crucible of conventional technology, (b) is a diagram showing an alignment of the cable with a welding lug of conventional technology, and (c) is a side surface after thermite welding by conventional technology.
  • FIG. 1 illustrates a slant view of a cable with a welding lug 1 of the present invention.
  • the abovementioned cable with welding lug 1 consisting of a copper or the like cable 5 inserted into a lug having a through hole, an outer surface that is plastically deformed by crimping and such of the lug and cable, consisting of a stepped portion 6 connecting the two substantially rectangular shaped surfaces
  • the cable 5 is in close contact with the inner surface of the lug.
  • FIG. 2 illustrates a diagram of the cable with weld lug 1 of the present invention placed in cable insertion portion 69, in order to perform thermite welding employing the conventional crucible 61 illustrated by Figure 6.
  • the welding jig constituting the crucible 61 is provided with a cavity portion 68 having an opening portion in surface 70 abutting the surface of the base metal (not shown), into which the welding material flows, and an insertion portion 69 having an opening portion in the surface 70 abutting the surface of the base metal (not shown) and communicating with the cavity portion 68.
  • the welding lug of the cable with the weld lug of the present invention is such that partially in the lengthwise direction of the inside of insertion portion 69, the surface 2 of the arch is in direct contact with the inner surface of the insertion portion 69, and the substantially rectangular surface 3 becomes flush with surface 70. Furthermore, the welding lug of the cable with welding lug in cavity portion 68 and the remaining portion of the insertion portion 69, is in direct contact with the inner surface of insertion portion 69, the portion that includes surface 4 extending to the inside of the cavity portion 68, the surface 4 and surface 70 being separated by a predetermined distance by a stepped portion 6 therebetween.
  • FIG. 3 shows a side surface diagram in which the condition of the surface of the welding lug and the surface of the base metal welded via a welded portion in thermite welding is indicated.
  • FIG. 4 (a) shows a perspective view of the cable with welding lug consisting of the first portion having the arch-shaped surface 2 and the substantially rectangular shaped surface 3, and the second portion having surface 4, crimped from the end surface of the first portion and formed into a substantially cube-like shape.
  • the molten metal also flows into the spaces between the surface 4 of the second portion and the surface of the base metal to form the welded portion, and as a result, the welded area is increased, and the weld strength is improved.
  • FIG. 4 (b) illustrates a perspective view of the cable with welding lug, in which the cable is inserted into the welding lug, processed by having the weld lug and cable plastically deformed into a substantially cube-like shape by crimping or the like, and further forming the stepped portion 6 in a surface thereof, which thereby connects surface 3 and surface 4.
  • the abovementioned cable with welding lug has the advantage of being easily manufactured, since the welding lug and cable are processed into a cube- like shape, and thereafter only a process of forming a step in a surface thereof is employed.
  • the inner surface of the insertion portion of the welding jig must be formed to match an outer surface other than that of surface 3 and surface 4.
  • the welded lug that is processed with crimping along with the cable is made of iron.
  • the cable is inserted into the iron lug having a through hole in the inner portion thereof, and simultaneously crimped to form the stepped portion in the surface opposing the surface of the metal base and bring the iron lug and cable in direct contact at the inner portion.
  • the welding lug is made of iron, since the strength of the welding lug is increased, there is no damage to the lug, even when an external force is applied, thus ensuring a superior weld in both iron and copper thermite weldings.
  • the cable with welding lug of the present invention can increase the weld area, and prevent the occurrence of welding lug damage after thermite welding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Arc Welding In General (AREA)

Abstract

L'invention améliore la résistance d'un embout soudé (1) et accroit la surface d'une soudure par aluminothermie. Le câble (5) et son embout (5) soudé par aluminothermie selon le procédé de l'invention est soudé par aluminothermie à un métal de base par solidification d'un matériau de soudage d'apport. Le câble muni de son embout (1) comprend une première partie (3) d'une forme telle que la surface de la partie en creux soit en contact direct avec, et affleure, la surface de la seconde partie ouverte, laquelle est au moins partiellement alignée sur la partie en creux, et une deuxième partie (4) s'étendant depuis l'une des extrémités de la première partie (3) à l'intérieur de la cavité, et séparée d'une distance prédéterminée de la surface de la première ouverture.
PCT/EP2007/060163 2006-09-25 2007-09-25 Câble et son embout étagé pour soudure par aluminothermie WO2008037714A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009528742A JP2010504217A (ja) 2006-09-25 2007-09-25 テルミット溶接用端子付ケーブル

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-259421 2006-09-25
JP2006259421A JP2008073762A (ja) 2006-09-25 2006-09-25 テルミット溶接用端子付ケーブル

Publications (1)

Publication Number Publication Date
WO2008037714A1 true WO2008037714A1 (fr) 2008-04-03

Family

ID=38705091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/060163 WO2008037714A1 (fr) 2006-09-25 2007-09-25 Câble et son embout étagé pour soudure par aluminothermie

Country Status (2)

Country Link
JP (2) JP2008073762A (fr)
WO (1) WO2008037714A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104284751A (zh) * 2012-03-20 2015-01-14 安普利股份有限公司 用于热焊的点火装置及其模具和包括该模具及装置的热焊设备
EP2993735A4 (fr) * 2013-09-13 2017-03-08 Showa Tecs Co. Ltd. Liaison de rail

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020043882A1 (en) * 2000-10-18 2002-04-18 Mitsubishi Denki Kabushiki Kaisha AC generator for use in vehicle and method for forming connection latch portion in conductor wire applied to stator winding thereof
DE10147908A1 (de) * 2001-09-28 2003-05-15 J Gilliam Elektrischer Anschluss
JP2005007461A (ja) * 2003-06-20 2005-01-13 Fci Asia Technology Pte Ltd 溶接端子
DE102004050676A1 (de) * 2004-10-18 2006-04-20 Volkswagen Ag Kabelschuh

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1933564A (en) * 1927-10-24 1933-11-07 Electric Railway Improvement Co Bonding rail
JP2005014008A (ja) * 2003-06-23 2005-01-20 Fci Asia Technology Pte Ltd 溶接端子
JP4563211B2 (ja) * 2005-02-21 2010-10-13 信号器材株式会社 レールボンド端子
JP2006228691A (ja) * 2005-02-21 2006-08-31 Shingo Kizai Kk レールボンド端子

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020043882A1 (en) * 2000-10-18 2002-04-18 Mitsubishi Denki Kabushiki Kaisha AC generator for use in vehicle and method for forming connection latch portion in conductor wire applied to stator winding thereof
DE10147908A1 (de) * 2001-09-28 2003-05-15 J Gilliam Elektrischer Anschluss
JP2005007461A (ja) * 2003-06-20 2005-01-13 Fci Asia Technology Pte Ltd 溶接端子
DE102004050676A1 (de) * 2004-10-18 2006-04-20 Volkswagen Ag Kabelschuh

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104284751A (zh) * 2012-03-20 2015-01-14 安普利股份有限公司 用于热焊的点火装置及其模具和包括该模具及装置的热焊设备
EP2993735A4 (fr) * 2013-09-13 2017-03-08 Showa Tecs Co. Ltd. Liaison de rail

Also Published As

Publication number Publication date
JP2010504217A (ja) 2010-02-12
JP2008073762A (ja) 2008-04-03

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