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WO2006046799A1 - Pointe de contact autocontrolee pour un soudage a l'arc sous gaz avec fil plein - Google Patents

Pointe de contact autocontrolee pour un soudage a l'arc sous gaz avec fil plein Download PDF

Info

Publication number
WO2006046799A1
WO2006046799A1 PCT/KR2005/001906 KR2005001906W WO2006046799A1 WO 2006046799 A1 WO2006046799 A1 WO 2006046799A1 KR 2005001906 W KR2005001906 W KR 2005001906W WO 2006046799 A1 WO2006046799 A1 WO 2006046799A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact tip
body part
self controlling
wire
welding
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.)
Ceased
Application number
PCT/KR2005/001906
Other languages
English (en)
Inventor
Hee-Jin Kim
Hoi-Soo Ryoo
Nam-Hoon Kim
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.)
Korea Institute of Industrial Technology KITECH
Original Assignee
Korea Institute of Industrial Technology KITECH
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 Korea Institute of Industrial Technology KITECH filed Critical Korea Institute of Industrial Technology KITECH
Publication of WO2006046799A1 publication Critical patent/WO2006046799A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B23K9/24—Features related to electrodes
    • B23K9/26—Accessories for electrodes, e.g. ignition tips
    • 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
    • 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
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • B23K9/295—Supporting devices adapted for making use of shielding means the shielding means being a gas using consumable electrode-wire
    • 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
    • B23K9/32—Accessories
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/013—Method or apparatus with electric heating

Definitions

  • the present invention relates, in general, to contact tips for GMA welding (gas metal arc welding) and, more particularly, to a self controlling contact tip for GMA welding in which elasticity is provided to the self controlling contact tip, which supports a wire and serves as an electric conductor, so that the self controlling contact tip holds the wire with constant pressure during welding, thus realizing stable welding.
  • GMA welding gas metal arc welding
  • gas metal arc welding is a welding method in which a wire serving as a filler metal is fed to a welded portion of a workpiece at constant speed while an electric arc exists between the end of the wire and the workpiece.
  • the wire feeding speed must correspond to the melting speed of the wire.
  • the contact tip is preferably made of a copper alloy, including pure copper (Cu), chromium (Cr) or zirconium (Zr), and having superior electric conductivity. That is, the contact tip serves to transfer electric current to the wire and guide the wire to the welding portion.
  • the contact tip is damaged and, thus, does not sufficiently conduct the above-mentioned functions during welding, defective welding is caused. As a result, time and labor are required to repair the defect or replace the contact tip. Due to this, welding productivity is reduced.
  • a contact tip which includes a main body part and a core part that contacts a wire, and in which the main body part is made of copper, copper alloy or aluminum alloy and the core part is made of a conductive metal that is harder than the main body part, was proposed in Korean Patent Laid-open Publication No. 1989-0011668.
  • a contact tip which includes a tip body and a tip end unit that is removably coupled to the body part by screw coupling or taper fitting, and in which the tip body is made of brass and the tip end unit is made of chrome-copper alloy, was proposed in Korean Patent Laid-open Publication No. 1999-0063948.
  • the manufacturing processes of the conventional contact tips are complex, and their manufacturing costs are high. Due to these problems, the above-mentioned conventional contact tips have still not been commercialized.
  • an object of the present invention is to provide a self controlling contact tip for GMA welding in which a manufacturing process is simple and the manufacturing costs are reduced, and which has elasticity so as to hold a wire with constant pressure during welding, so that the contact area between the contact tip and the wire is increased, thus having enhanced durability, and easily helping transfer electric current from the contact tip to the wire, thereby forming a stable welding arc, and in which even if an outlet of a wire feed hole of the contact tip is clogged, the front end of the contact tip is immediately widened by wire feed pressure, thereby the wire is not welded to the front end of the contact tip, thus preventing burnback.
  • the present invention provides a self controlling contact tip for GMA welding, including: a body part; a connection part coupled to the body part; and a wire feed hole longitudinally formed through both the body part and the connection part, wherein the self controlling contact tip further includes a longitudinal slot formed in the body part from a front end of the body part to a predetermined position.
  • the longitudinal slot is enlarged in width from the front end of the body part to a rear end.
  • the longitudinal slot may be formed on a line crossing through a central axis of the body part, so that the body part is divided into first and second body parts by the lon ⁇ gitudinal slot.
  • the longitudinal slot may have a predetermined length shorter than a length of the body part.
  • the self controlling contact tip may further include a hole formed in the body part along a proximal end of the longitudinal slot.
  • the diameter of a wire feed hole of the self controlling contact tip does not greatly affect the contact area between the self controlling contact tip and the wire. Accordingly, it is unnecessary to accurately set the diameter of the wire feed hole when manufacturing the contact tip. Thus, a process of manufacturing the self controlling contact tip is simplified and man ⁇ ufacturing costs thereof are reduced. Furthermore, because the self controlling contact tip has an elastic structure, the self controlling contact tip elastically holds a wire with constant pressure. Hence, the contact surface between the contact tip and the wire is increased. In addition, as the wear of the contact tip progresses, the contact surface between the contact tip and the wire increases further. Therefore, stable welding can be achieved.
  • the lifetime of the self controlling contact tip of the present invention is three times or more longer than conventional contact tips.
  • electric current is stably supplied to the wire, so that a welding arc is stably maintained and welding quality is enhanced. Even if the wire feed hole is clogged, because the front end of the contact tip is immediately widened by wire feed pressure, the wire is not welded to the front end of the contact tip, thus preventing burnback.
  • FlG. 1 is front and side views showing a self controlling contact tip for GMA welding (gas metal arc welding), according to an embodiment of the present invention
  • FlG. 2 is front and side views showing a self controlling contact tip, according to another embodiment of the present invention
  • FlG. 3 is front and side views showing a self controlling contact tip, according to a further embodiment of the present invention
  • FlG. 4 is sectional views showing a wire inserted into the self controlling contact tip according to the present invention
  • FlG. 5 is sectional views showing the state of the wire in the self controlling contact tip after welding according to the present invention
  • FlG. 6 is a picture of the self controlling contact tip when not in use according to the present invention
  • FlG. 1 is front and side views showing a self controlling contact tip for GMA welding (gas metal arc welding), according to an embodiment of the present invention
  • FlG. 2 is front and side views showing a self controlling contact tip, according to another embodiment of the present invention
  • FlG. 3 is front and side views showing a self controlling contact tip
  • FIG. 7 is a picture of the self controlling contact tip to show its state after use according to the present invention
  • FIG. 8 is a picture showing a bead when using the self controlling contact tip according to the present invention
  • FlG. 9 is a sectional view showing a pose of a wire interposed in a conventional contact tip during use
  • FlG. 10 is a picture showing burnback occurring in a conventional contact tip
  • FlG. 11 is a picture showing a conventional contact tip which is not in use
  • FlG. 12 is a picture of the conventional contact tip to show its state after use.
  • FlG. 13 is a picture showing a bead when using the conventional contact tip.
  • FlG. 1 is front and side views showing a self controlling contact tip for GMA welding, according to an embodiment of the present invention.
  • a longitudinal slot 12 is formed in a body part 10 of the self controlling contact tip. Therefore, the present invention can support a wire 30 with constant pressure regardless of deformation of the contact tip, thus making it possible for a welding process to be steadily conducted.
  • the self controlling contact tip includes the body part 10 and a connection part 20 which is integrated with the body part 10 and is coupled to a diffuser (not shown).
  • a wire feed hole 11 is longitudinally formed through both the body part 10 and the connection part 20 of the self controlling contact tip, so as to serve as a path by which to pass the wire 30, which serves as a filler metal, through the self controlling contact tip.
  • the longitudinal slot 12 is provided along the wire feed hole 11 of the body part 10, so that the wire feed hole 11 com ⁇ municates with the outside through the longitudinal slot 12.
  • the longitudinal slot 12 enlarges in width from a front end of the body part 10 to a rear end.
  • the body part 10 constituting the self controlling contact tip has the shape similar to a clamp. Therefore, when the wire 30 is fed to the outside through the self controlling contact tip, the front end of the body part 10 is widened. At this time, the front end of the self controlling contact tip having the clamp shape supports the wire 30 with constant pressure.
  • the longitudinal slot 12 has a straight cross-section and is formed on an imaginary line (L) crossing through a central axis of the body part 10, as shown in FIG. 1.
  • L imaginary line
  • the longitudinal slot 12 evenly divides the body part 10 into the first and second body parts 10a and 10b.
  • FIGS. 2 and 3 are front and side views showing self controlling contact tips, according to other embodiments of the present invention.
  • a lon ⁇ gitudinal slot 12 may be shorter than the length of a body part 10 of the self controlling contact tip, unlike the self controlling contact tip of FIG. 1 in which the length of the longitudinal slot 12 is the same as that of the body part 10.
  • the length of the longitudinal slot 12 may be adjusted according to the characteristics of the self controlling contact tip such that a wire is supported with appropriate pressure while being fed to a welded portion through the self controlling contact tip.
  • a circular hole 13 may be formed through a body part 10 along an inner end of a longitudinal slot 12 by drilling.
  • the elasticity of the body part 10 is adjusted by the diameter of the circular hole 13. In other words, as the diameter of the circular hole 13 is increased, the elasticity of the body part 10 is reduced. Therefore, the diameter of the circular hole 13 is determined according to the characteristics of the self controlling contact tip.
  • FIGS. 1 through 3 the structure, in which the body part 10 is divided into two parts by the longitudinal slot 13 having the straight cross-section, is illustrated in FIGS. 1 through 3, but the present invention is not limited to this. That is, the body part 10 may be divided into three or more parts. These modifications fall within the bounds of the present invention.
  • FlG. 4 is sectional views showing the wire 30 inserted into the self controlling contact tip of the present invention.
  • FlG. 5 is sectional views showing the state of the wire 30 in the self controlling contact tip after welding.
  • the connection part 20 of the contact tip is screwed to a diffuser constituting a welding torch.
  • the first and second body parts 10a and 10b hold the wire 30 with constant pressure, while the wire 30 is fed to the welded portion through the body part 10. As such, the increased contact surface between the contact tip and the wire 30 promotes stable electric current supply.
  • the wire feed hole 11 progressively occurs as welding is conducted, the wire feed hole 11 is enlarged so that a gap defined between the first and second body parts 10a and 10b is reduced. As a result, the contact surface between the contact tip and the wire 30 is further increased.
  • the self controlling contact tip of the present invention is not excessively worn despite being used in welding for four hours, as shown in FIGS. 6 and 7 which respectively show the initial state of the self controlling contact tip of the present invention and the state after welding for four hours.
  • FIGS. 6 and 7 respectively show the initial state of the self controlling contact tip of the present invention and the state after welding for four hours.
  • the front end of the self controlling contact tip evenly contacts the wire even after welding.
  • consistent welding beads are formed, as shown in FlG. 8.
  • the self controlling contact tip may be used for more than six hours.
  • the lifetime of the self controlling contact tip is three times or more longer than the conventional contact tip.
  • the wire might be welded to the front end of the self controlling contact tip after welding for six hours. However, the wire was immediately detached from the self controlling contact tip and the welding process could continue.
  • the size of welding arc of the self controlling contact tip varies. The variation of the size of the welding arc lets a user know that the contact tip is running out. At this time, the user replaces the contact tip with another contact tip after finishing the welding process without stopping.
  • the diameter of a wire feed hole of the self controlling contact tip does not greatly affect the contact area between the self controlling contact tip and the wire. Accordingly, it is unnecessary to accurately set the diameter of the wire feed hole when manufacturing the self controlling contact tip. Thus, a process of manufacturing the self controlling contact tip is simplified and manufacturing costs thereof are reduced. Furthermore, because the self controlling contact tip has an elastic structure, the self controlling contact tip elastically holds a wire with constant pressure. Hence, the contact surface between the contact tip and the wire is increased. In addition, as the wear of the contact tip progresses, the contact surface between the contact tip and the wire increases further. Therefore, stable welding can be achieved.
  • the lifetime of the self controlling contact tip of the present invention is three times or more longer than conventional contact tips.
  • electric current is stably supplied to the wire, so that a welding arc is stably maintained and welding quality is enhanced. Even if the wire feed hole is clogged, because the front end of the contact tip is immediately widened by wire feed pressure, the wire is not welded to the front end of the contact tip, thus preventing burnback.

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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 une pointe de contact autocontrôlée pour un soudage à l'arc sous gaz avec fil plein (procédé GMAW). Cette pointe sert de support à un fil (30) à pression constante, quelle que soit la déformation de la pointe de contact, ce qui permet au procédé de soudage de s'effectuer dans des conditions stables. La pointe de contact autocontrôlée comprend une partie de corps (10), une partie de liaison (20) solidaire de la partie de corps (10), et un orifice d'alimentation de fil (11) longitudinalement formé à la fois à travers la partie de corps (10) et la partie de liaison (20). La pointe de contact autocontrôlée comprend également une fente longitudinale (12) formée dans la partie de corps (10), d'une extrémité avant de la partie de corps (10) à une position prédéterminée. La fente longitudinale (12) est élargie dans sa largeur, de l'extrémité avant de la partie de corps (10) jusqu'à l'extrémité arrière.
PCT/KR2005/001906 2004-10-26 2005-06-20 Pointe de contact autocontrolee pour un soudage a l'arc sous gaz avec fil plein Ceased WO2006046799A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040085595A KR100646096B1 (ko) 2004-10-26 2004-10-26 자기제어 기능을 갖는 ｇｍａ용접용 콘택트팁
KR10-2004-0085595 2004-10-26

Publications (1)

Publication Number Publication Date
WO2006046799A1 true WO2006046799A1 (fr) 2006-05-04

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ID=36228017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/001906 Ceased WO2006046799A1 (fr) 2004-10-26 2005-06-20 Pointe de contact autocontrolee pour un soudage a l'arc sous gaz avec fil plein

Country Status (2)

Country Link
KR (1) KR100646096B1 (fr)
WO (1) WO2006046799A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010000002A1 (fr) * 2008-06-30 2010-01-07 Fronius International Gmbh Tube de contact pour un chalumeau soudeur
WO2013095221A1 (fr) 2011-12-20 2013-06-27 Esab Ab Pointe de contact pour une utilisation dans le soudage à l'arc sous gaz
WO2014036696A1 (fr) * 2012-09-05 2014-03-13 Gm Global Techonology Operations Llc Dispositif et procédé d'alimentation d'un fil de soudage
CN106425054A (zh) * 2016-11-30 2017-02-22 上海永言特种材料研究所 一种导电嘴及其制备方法
WO2020052588A1 (fr) * 2018-09-15 2020-03-19 何强 Pointe de contact de soudage résistante à haute température et à longue durée de vie, son procédé de fabrication et son procédé d'utilisation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN222147261U (zh) * 2021-12-17 2024-12-10 米沃奇电动工具公司 用于动力工具的无刷电机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890011668A (ko) * 1988-01-14 1989-08-21 다니이 아끼오 소모전극식 아아크용접용 콘택트팁
KR950026909A (ko) * 1994-03-29 1995-10-16 이창호 라텍스 쿠션물(latex cushions)의 제조방법
US5635091A (en) * 1993-04-21 1997-06-03 Babcock-Hitachi Kabushiki Kaisha Tips for welding and their manufacturing process
JPH10193123A (ja) * 1997-01-10 1998-07-28 Matsushita Electric Ind Co Ltd 溶接用コンタクトチップ
US6710300B2 (en) * 2000-08-25 2004-03-23 Illinois Tool Works Inc. Contact tip assembly for mig gun

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003285165A (ja) * 2002-03-25 2003-10-07 Daido Steel Co Ltd アーク溶接用溶接チップおよびアーク溶接装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890011668A (ko) * 1988-01-14 1989-08-21 다니이 아끼오 소모전극식 아아크용접용 콘택트팁
US5635091A (en) * 1993-04-21 1997-06-03 Babcock-Hitachi Kabushiki Kaisha Tips for welding and their manufacturing process
KR950026909A (ko) * 1994-03-29 1995-10-16 이창호 라텍스 쿠션물(latex cushions)의 제조방법
JPH10193123A (ja) * 1997-01-10 1998-07-28 Matsushita Electric Ind Co Ltd 溶接用コンタクトチップ
US6710300B2 (en) * 2000-08-25 2004-03-23 Illinois Tool Works Inc. Contact tip assembly for mig gun

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010000002A1 (fr) * 2008-06-30 2010-01-07 Fronius International Gmbh Tube de contact pour un chalumeau soudeur
US8546727B2 (en) 2008-06-30 2013-10-01 Fronius International Gmbh Contact tube for a welding torch
WO2013095221A1 (fr) 2011-12-20 2013-06-27 Esab Ab Pointe de contact pour une utilisation dans le soudage à l'arc sous gaz
US20150014282A1 (en) * 2011-12-20 2015-01-15 Esab Ab Contact tip for use in gas metal-arc welding
US10201872B2 (en) * 2011-12-20 2019-02-12 Esab Ab Contact tip for use in gas metal-arc welding
WO2014036696A1 (fr) * 2012-09-05 2014-03-13 Gm Global Techonology Operations Llc Dispositif et procédé d'alimentation d'un fil de soudage
CN104797371A (zh) * 2012-09-05 2015-07-22 通用汽车环球科技运作有限责任公司 焊丝输送装置及方法
CN106425054A (zh) * 2016-11-30 2017-02-22 上海永言特种材料研究所 一种导电嘴及其制备方法
CN106425054B (zh) * 2016-11-30 2019-05-17 上海永言特种材料研究所 一种导电嘴
WO2020052588A1 (fr) * 2018-09-15 2020-03-19 何强 Pointe de contact de soudage résistante à haute température et à longue durée de vie, son procédé de fabrication et son procédé d'utilisation

Also Published As

Publication number Publication date
KR20060036582A (ko) 2006-05-02
KR100646096B1 (ko) 2006-11-15

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