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WO2025091112A1 - Procédé et système pour améliorer une pointe de contact d'un ensemble de soudage - Google Patents

Procédé et système pour améliorer une pointe de contact d'un ensemble de soudage Download PDF

Info

Publication number
WO2025091112A1
WO2025091112A1 PCT/CA2024/051424 CA2024051424W WO2025091112A1 WO 2025091112 A1 WO2025091112 A1 WO 2025091112A1 CA 2024051424 W CA2024051424 W CA 2024051424W WO 2025091112 A1 WO2025091112 A1 WO 2025091112A1
Authority
WO
WIPO (PCT)
Prior art keywords
rod
contact tip
bore
diameter
channel
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.)
Pending
Application number
PCT/CA2024/051424
Other languages
English (en)
Inventor
Augusto Hernández ZEPEDA
José Rubén ZEPEDA CORTÉS
Joel Antonio ROMANO ROMERO
Eduardo Ignacio ROMERO CARTAS
José Javier DIAZ MACÍAS
Eric Ezequiel IOTTI
Hugo Mario PATIÑO BARRIENTOS
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.)
MAGNA INTERNATIONAL Inc
Magna International Inc
Original Assignee
MAGNA INTERNATIONAL Inc
Magna International 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 MAGNA INTERNATIONAL Inc, Magna International Inc filed Critical MAGNA INTERNATIONAL Inc
Publication of WO2025091112A1 publication Critical patent/WO2025091112A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B23K9/00—Arc welding or cutting
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/122—Devices for guiding electrodes, e.g. guide tubes
    • B23K9/123—Serving also as contacting devices supplying welding current to an electrode
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode

Definitions

  • the present disclosure relates to systems and methods for welding. More particularly, the present disclosure relates to a system and method for improving a tip of a welding assembly, such as a gas metal arc welding assembly.
  • Welding is a method of joining metal work pieces.
  • Arc welding is a commonly used type of welding which involves the joining of metals via an electric arc.
  • An arc welding assembly typically includes a welding gun which has a contact tip that is connected to a power supply.
  • One of the work pieces is also connected to the power supply such that when the contact tip is positioned against the work piece, a circuit is completed between the power supply and the work piece to cause an electrical current to flow through the electrode and the work piece.
  • the electrical current produces a high-temperature arc between the electrode and the work pieces, which melts the work pieces in the regions of the arc to thus weld the work pieces to one another upon cooling.
  • GMAW Gas metal arc welding
  • a common issue with GMAW assemblies is that a contact tip which surrounds the metal wire can suffer wear. Material costs associated with replacing contact trips can be expensive, and the replacement process can lead to significant downtime from welding operations.
  • a method for improving a contact tip for a welding assembly includes providing a contact tip that extends along an axis between a proximal end and a distal end.
  • the contact tip has a channel that extends between the proximal and distal ends for receiving a welding wire.
  • the channel has a channel diameter.
  • the method also includes forming a bore at the distal end of the contact tip along the axis.
  • the bore has a bore diameter that is larger than the channel diameter of the channel.
  • the method also includes cutting a length of a rod.
  • the rod has a rod diameter that is substantially the same as the bore diameter of the bore of the contact tip.
  • the method also includes inserting the length of the rod in the bore at the distal end of the contact tip.
  • the method also includes creating a passage through the rod that has passage diameter that is approximately the same channel diameter of the contact tip.
  • the method also includes passing a welding wire through the channel of the contact tip and the passage of the rod.
  • a contact tip for a welding gun includes a body that extends along an axis between a proximal end and a distal end.
  • the body also defines a channel that extends between the proximal and distal ends for receiving a welding wire.
  • the channel has a channel diameter.
  • a bore is located at the distal end of the contact tip along the axis.
  • the bore has a bore diameter that is greater than the channel diameter of the channel.
  • a rod is positioned in the bore of the contact tip. The rod defines a passage that extends axially along the axis.
  • the rod positioned at the distal end of the contact tips allows worn material of the contact tip to be replaced with unworn and stronger material of the rod, thus allowing the contact tip to be re-used, thereby prolonging a usable life of the contact tip. Additionally, the method of boring the contact tip and inserting the rod may be done quickly and cheaply inhouse, with minimal tools and minimal material usage, thus reducing downtime of welding operations when fixing / improving the contact tip.
  • FIG. 1 is a schematic diagram of an example gas metal arc welding assembly
  • FIG. 2A is a perspective view of a first embodiment of a contact tip of an electrode of a welding assembly according to an aspect of the disclosure
  • FIG. 2B is a perspective, cross-sectional view of the first embodiment of the contact tip
  • FIG. 2C is a top view of the first embodiment of the contact tip
  • FIG. 3 is a front view of a metal rod for being inserted into a bore of the contact tip
  • FIG. 4A is a perspective view of the first embodiment of the contact tip, during a first step of improving a worn contact tip;
  • FIG. 4B is a perspective view of the first embodiment of the contact tip, during a second step of improving a worn contact tip;
  • FIG. 4C is a perspective view of the first embodiment of the contact tip, during a third step of improving a worn contact tip;
  • FIG. 4D is a perspective view of the first embodiment of the contact tip, during a fourth step of improving a worn contact tip;
  • FIG. 5 A is a perspective view of a second embodiment of the contact tip
  • FIG. 5B is a perspective, cross-sectional view of the second embodiment of the contact tip
  • FIG. 6A is a perspective view of a third embodiment of the contact tip
  • FIG. 6B is a perspective, cross-sectional view of the third embodiment of the contact tip
  • FIG. 7 is a perspective view of a fourth embodiment of the contact tip.
  • FIG. 8 is a flow diagram illustrating a method for improving a contact tip for a welding assembly.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • the subject embodiments are directed to welding systems and methods.
  • the example embodiments are only provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
  • a welding assembly 10 for welding metal work pieces 12 is generally shown. More particularly, embodiments of an improved contact tip 25 A, 25B, 25C,
  • FIG. 1 presents a welding assembly 10 that has a control housing 14.
  • the control housing 14 includes a power source 16 for powering the welding assembly 10.
  • the power source 16 has a first terminal 18 and a second terminal 20.
  • One of the terminals 18, 20 is a positive terminal 18 and the other of the terminals 18, 20 is a negative terminal 20.
  • the welding system 10 also includes a welding gun 22 for welding.
  • the welding gun 22 has a handle 24 for being gripped by an operator, and a welding tip region 26 that has a contact tip 25 for contacting the workpiece 12 during welding to create the weld.
  • a neck 27 connects the handle 24 and the welding tip region 26.
  • the system 10 also includes a spool 28 of an electrode wire 30 for being supplied to the welding gun 22 through the handle 24 and neck 27 and out of the tip region 26 to serve as an electrode during welding.
  • a wire feeder 32 is coupled to the control housing 14 and the electrode wire 30 for feeding the electrode wire 30 to the welding gun 22.
  • a gas source 34 e.g., a cylinder
  • a gas e.g., an inert gas such as argon
  • a gas line 36 extends from the gas source 34 to the control housing 14 and to the welding gun 22 for providing the gas to the welding gun 22.
  • a first power cable 38 extends from one of the first and second terminals 18, 20 of the power source 16 and through the handle 24 of the welding gun 22 and is electrically connected to the electrode wire 30 to provide a current to the electrode wire 30.
  • the system 10 also includes a conductive clamp 42 for being clamped to the work piece 12 during welding.
  • a second power cable 40 extends from the other of the first and second terminals 18, 20 to the clamp 42 for completing a circuit between the electrode wire 30 and the work piece 12 during welding.
  • the welding gun 22 further includes one or more activation devices 44, such as a trigger 44, button, switch, or the like for permitting an operator to control the supply of the electrode wire 30 to the welding gun 22, to control a supply of power from the power source 16 to the welding gun 22, and/or to control a supply of gas to the welding gun 22 from the gas source 34.
  • activation devices 44 such as a trigger 44, button, switch, or the like for permitting an operator to control the supply of the electrode wire 30 to the welding gun 22, to control a supply of power from the power source 16 to the welding gun 22, and/or to control a supply of gas to the welding gun 22 from the gas source 34.
  • FIGS. 2- 4D show a first embodiment of the contact tip 25 A.
  • the contact tip includes a body 27 that extends along an axis A between a proximal end 46 and a distal end 48.
  • the body 27 defines a channel 50 that extends axially from the proximal end 46 for receiving a welding / electrode wire 30.
  • the channel 50 has a channel diameter De.
  • the contact tip 25 A also defines a bore 52 at the distal end 46 of the contact tip 25 along the axis A.
  • the bore 52 is aligned with and connected to channel 50 along the axis A.
  • the bore 52 has a bore diameter DB which is larger than the channel diameter De.
  • the bore 52 has a diameter of approximately 1/8 of an inch but could have other diameters depending on specific applications.
  • a metal rod 54 is positioned in the bore 52.
  • the metal rod 52 has a length that is approximately the same as that of the bore 52 such that an end of the metal rod 54 is aligned with the distal end of the contact tip 25A.
  • the metal rod 52 has a rod diameter DR that is approximately the same as the bore diameter DB, such that the metal rod 52 is fixed within the bore 52 via an interference fit.
  • the metal rod 52 could also be attached to the contact tip 25A in the bore 52 via other connections, such as an adhesive.
  • the rod 54 is of a metal composition of refractory metals tungsten, molybdenum and tungsten carbide combined with copper, such as an elkonite® material.
  • the metal rod 52 also has a passage 56 that extends axially through the metal rod 52 in alignment with the channel 50. As will be described in further detail below, the metal rod 52 allows worn material of the contact tip 25 to be replaced with unworn and stronger material of the metal rod 52, thus allowing the contact tip 25 to be re-used and thereby prolonging a usable life of the contact tip 25.
  • FIGS. 5 A and 5B A second embodiment of a contact tip 25B is shown in FIGS. 5 A and 5B, a third embodiment of a contact tip 25C is shown in FIGS. 6A and 6B, and a fourth embodiment of the contact tip 25D is shown in FIG. 7.
  • These embodiments have generally the same arrangement of components as the first embodiment, but are shaped differently.
  • a method 100 for improving a contact tip 25 for a welding assembly 10 is provided.
  • the method 100 includes 102 providing a contact tip 25 A which does not yet include a metal rod 54.
  • the contact tip 25A at this stage may be a worn contact tip 25A after use in welding operations, or a contact tip 25 that has not yet been used / worn. In either case, the described method can be used to improve the contact tip 25.
  • the method also includes 104 creating a bore 52 at the distal end 48 of the contact tip 25 along the axis A.
  • Various bore-creating methods may be used, including the use of a drill.
  • the bore 52 has a bore diameter DB that is larger than a channel diameter De of the contact tip 25A.
  • the bore diameter DB is approximately 1/8 of an inch but could have other diameters depending on specific applications.
  • the method also includes 106 inserting a length of a metal rod 54 in the bore 52 at the distal end 48 of the contact tip 25. At this point the method also includes 108 fixing the metal rod 54 in the bore 52.
  • the metal rod 54 has a rod diameter DR that is approximately equal to the diameter of the bore 52 of approximately 1/8 of an inch such that the rod 54 may be fixed in the bore 52 via an interference fit which inhibits removal of the rod 54.
  • Other connections may be used, such as an adhesive.
  • the method also includes 110 cutting the metal rod 54 to a predetermined length.
  • the predetermined length substantially matches a length of the bore 52 such that the metal rod 54 terminates at the distal end 48 of the contact tip 25 A. It should be appreciated that this step may alternatively occur prior to insertion of the rod 54 into the bore 52.
  • the method also includes 112 creating a passage 56 through the rod 54 that has approximately the same diameter as the channel 50 of the contact tip 25.
  • the method includes 114 passing a welding wire 30 through the channel 50 of the contact tip 25 and the passage 56 of the rod 52 such that normal welding operations may be executed with the contact tip 25.
  • positioning the metal rod 52 at the distal end 48 of the contact tip 25 allows worn material of the contact tip 25 to be replaced with unworn and stronger material of the metal rod 52, thus allowing the contact tip 25 to be re-used and thereby prolonging a usable life of the contact tip 25.
  • the method of boring the contact tip 25 and inserting the metal rod 52 may be done quickly in-house, with minimal tools and minimal material usage, thus minimizing downtime of welding operations when fixing / improving the contact tip 25. This leads to overall reductions in manufacturing costs.
  • tests of contact tips 25 improved according to the subject method were found to maintain weld quality as compared to contact tips prior to use of the method. Additionally, the tests revealed a 7% reduction of average current due to the selected material of the rod 54 (a metal composition of refractory metals tungsten, molybdenum and tungsten carbide combined with copper).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

L'invention concerne un procédé pour améliorer une pointe de contact pour un ensemble de soudage comprenant la fourniture d'une pointe de contact qui s'étend le long d'un axe entre une extrémité proximale et une extrémité distale. La pointe de contact a un canal axial ayant un diamètre de canal. Le procédé comprend également la formation d'un alésage axial avec un diamètre d'alésage au niveau de l'extrémité distale de la pointe de contact. Le diamètre d'alésage est supérieur au diamètre de canal. Le procédé comprend également la découpe d'une longueur d'une tige. La tige a un diamètre de tige qui est sensiblement le même que le diamètre d'alésage. Le procédé comprend également l'insertion de la longueur de la tige dans l'alésage. Le procédé comprend également la création d'un passage à travers la tige qui a un diamètre de passage qui est approximativement le même que le diamètre de canal. Le procédé comprend également le passage d'un fil de soudage à travers le canal et le passage.
PCT/CA2024/051424 2023-10-30 2024-10-29 Procédé et système pour améliorer une pointe de contact d'un ensemble de soudage Pending WO2025091112A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363546321P 2023-10-30 2023-10-30
US63/546,321 2023-10-30

Publications (1)

Publication Number Publication Date
WO2025091112A1 true WO2025091112A1 (fr) 2025-05-08

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ID=95583153

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2024/051424 Pending WO2025091112A1 (fr) 2023-10-30 2024-10-29 Procédé et système pour améliorer une pointe de contact d'un ensemble de soudage

Country Status (1)

Country Link
WO (1) WO2025091112A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450341A (en) * 1981-11-30 1984-05-22 Townmotor Corporation Contact tip for a welding head
CN2070219U (zh) * 1990-08-03 1991-01-30 航空航天工业部航空工业勘察设计研究院 复合结构导电嘴
JPH09141444A (ja) * 1995-11-16 1997-06-03 Exedy Corp コンタクトチップ及びガスシールドアーク溶接機用トーチ
JP2002224837A (ja) * 2001-02-07 2002-08-13 Babcock Hitachi Kk アーク溶接用トーチ
US20060151453A1 (en) * 2001-11-07 2006-07-13 Commonwealth Scientific And Industrial Research Organisation Consumable electrode arc welding
US20100320184A1 (en) * 2009-06-19 2010-12-23 Lincoln Global, Inc. Welding contact tip and welding gun incorporating the same
US20110006048A1 (en) * 2009-07-13 2011-01-13 Illinois Tool Works Inc. Refractory materials reinforced composites for the gmaw contact tips
KR101497460B1 (ko) * 2013-12-02 2015-03-03 주식회사 세원정공 가스 용접토치용 컨택트 팁
CN205967766U (zh) * 2016-08-23 2017-02-22 天津维尔丁科技有限公司 一种二氧化碳气体保护焊导电嘴
CN112171031A (zh) * 2020-09-15 2021-01-05 常州特尔玛枪嘴有限公司 一种导电嘴及其复合棒材及制造工艺

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450341A (en) * 1981-11-30 1984-05-22 Townmotor Corporation Contact tip for a welding head
CN2070219U (zh) * 1990-08-03 1991-01-30 航空航天工业部航空工业勘察设计研究院 复合结构导电嘴
JPH09141444A (ja) * 1995-11-16 1997-06-03 Exedy Corp コンタクトチップ及びガスシールドアーク溶接機用トーチ
JP2002224837A (ja) * 2001-02-07 2002-08-13 Babcock Hitachi Kk アーク溶接用トーチ
US20060151453A1 (en) * 2001-11-07 2006-07-13 Commonwealth Scientific And Industrial Research Organisation Consumable electrode arc welding
US20100320184A1 (en) * 2009-06-19 2010-12-23 Lincoln Global, Inc. Welding contact tip and welding gun incorporating the same
US20110006048A1 (en) * 2009-07-13 2011-01-13 Illinois Tool Works Inc. Refractory materials reinforced composites for the gmaw contact tips
KR101497460B1 (ko) * 2013-12-02 2015-03-03 주식회사 세원정공 가스 용접토치용 컨택트 팁
CN205967766U (zh) * 2016-08-23 2017-02-22 天津维尔丁科技有限公司 一种二氧化碳气体保护焊导电嘴
CN112171031A (zh) * 2020-09-15 2021-01-05 常州特尔玛枪嘴有限公司 一种导电嘴及其复合棒材及制造工艺

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