JP2020022991A - Shield nozzle of gas shield arc-welding torch - Google Patents

Shield nozzle of gas shield arc-welding torch Download PDF

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Publication number
JP2020022991A
JP2020022991A JP2018156717A JP2018156717A JP2020022991A JP 2020022991 A JP2020022991 A JP 2020022991A JP 2018156717 A JP2018156717 A JP 2018156717A JP 2018156717 A JP2018156717 A JP 2018156717A JP 2020022991 A JP2020022991 A JP 2020022991A
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shield
shield nozzle
nozzle
spatter
gas
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蕗澤　武夫
Takeo Fukizawa
武夫 蕗澤
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Shinkokiki Co Ltd
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Shinkokiki Co Ltd
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Priority to JP2018156717A priority Critical patent/JP2020022991A/en
Priority to PCT/JP2019/030423 priority patent/WO2020031879A1/en
Publication of JP2020022991A publication Critical patent/JP2020022991A/en
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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
    • 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

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

Abstract

To provide a shield nozzle of a gas shield arc-welding torch, which not only restricts adhesion of spatter to the shield nozzle, but in which adhesion force of the adhered spatter is weak so that the spatter is easily removed, and further, which does not require much labor and time to be manufactured.SOLUTION: Provided is a shield nozzle 5 into which a welding wire 2 is inserted, and which contains a contact tip 1 for supplying electric current to the welding wire 2, and is formed of a carbon-ceramic composite material.SELECTED DRAWING: Figure 1

Description

本発明は、ガスシールドアーク溶接を行う際に用いられるガスシールドアーク溶接トーチのシールドノズルに関するものである。  The present invention relates to a shield nozzle of a gas shielded arc welding torch used when performing gas shielded arc welding.

一般に、ＭＡＧ溶接、ＭＩＧ溶接等のガスシールドアーク溶接に用いられる溶接トーチは、図２に示すように、溶接ワイヤが送り出されるコンタクトチップ５０と、該コンタクトチップ５０を保持するチップホルダー５１と、コンタクトチップ５０の先端部を露出するように、コンタクトチップの外周側を覆った円筒状のシールドノズル５２と、該シールドノズル５２を保持するインシュレータ５３とから構成されており、ガスシールドアーク溶接は、溶接時にコンタクトチップ５０とシールドノズル５２との間の環状隙間を介してシールドガスを溶接箇所に向けて噴出し、溶接ワイヤにコンタクトチップを介して大電流を流して、溶接ワイヤと被溶接部材との間でアークを発生させ、溶接ワイヤと被溶接部材を溶かして被溶接部材を溶接するものである。  Generally, as shown in FIG. 2, a welding torch used for gas shield arc welding such as MAG welding and MIG welding includes a contact tip 50 from which a welding wire is fed, a tip holder 51 for holding the contact tip 50, and a contact. It is composed of a cylindrical shield nozzle 52 that covers the outer peripheral side of the contact tip so as to expose the tip of the tip 50, and an insulator 53 that holds the shield nozzle 52. Occasionally, a shielding gas is spouted toward the welding location through an annular gap between the contact tip 50 and the shield nozzle 52, and a large current is applied to the welding wire via the contact tip, so that the welding wire and the member to be welded are separated from each other. An arc is generated between the welding wires to melt the welding wire and the workpiece and weld the workpiece. It is intended.

ガスシールドアーク溶接では、溶接中に飛散するスパッタがコンタクトチップ５０やシールドノズル５２に付着すると、コンタクトチップ５０とシールドノズル５２との間の隙間が狭くなり充分なシールドガスが供給されないので、溶接品質が悪くなり、頻繁にスパッタを除去しなければならないため、従来、特許文献１で示すように、シールドノズルに導電性セラミック被膜の母材表上被膜層を形成し、該母材表上被膜層の上層に、硬化セラミック被膜の表面被膜層を形成し、スパッタの付着を抑制したシールドノズルがあった。  In the gas shielded arc welding, if spatter scattered during welding adheres to the contact tip 50 and the shield nozzle 52, the gap between the contact tip 50 and the shield nozzle 52 becomes narrow, and a sufficient shield gas is not supplied. And the spatter must be removed frequently, so that a base ceramic surface layer of a conductive ceramic film is formed on a shield nozzle, as shown in Patent Document 1, and the base metal surface layer There was a shield nozzle in which a surface coating layer of a hardened ceramic coating was formed as an upper layer to suppress adhesion of spatter.

特開２０１１−０５０９８０JP 2011-050980A

前記のものでは、シールドノズルのスパッタの付着を抑制するという効果があるが、付着したスパッタの剥離性が向上をするものではないので、スパッタの除去作業が面倒であり、またシールドノズルの母材に２又は３種類の被膜層を形成しているため、製造に手間と時間が掛るという問題があった。  In the above-described one, there is an effect of suppressing the adhesion of spatter of the shield nozzle, but since it does not improve the releasability of the attached spatter, the work of removing the spatter is troublesome, and the base material of the shield nozzle is also difficult. However, since two or three types of coating layers are formed, there is a problem that the production takes time and effort.

本発明は、前記の問題を解決し、シールドノズルに対するスパッタの付着を抑制するだけではなく、付着したスパッタの付着力が弱く。簡単に剥離することができ、また、製造に手間と時間が掛らないガスシールドアーク溶接トーチのシールドノズルを提供することを目的になされたものである。  The present invention solves the above-described problem, and not only suppresses the adhesion of spatter to the shield nozzle, but also weakens the adhesive force of the adhered spatter. It is an object of the present invention to provide a shield nozzle for a gas shielded arc welding torch that can be easily peeled off and does not require much labor and time for manufacturing.

上記課題を解決するためになされた本発明のガスシールドアーク溶接トーチのシールドノズルは、溶接ワイヤが挿通され、溶接ワイヤに電流を供給するコンタクトチップを包容するように配置されたシールドノズルを炭素−セラミックス複合材にて形成したことを特徴とするものである。  The shield nozzle of the gas shielded arc welding torch of the present invention made in order to solve the above-mentioned problem is a carbon-based shield nozzle in which a welding wire is inserted and arranged so as to enclose a contact tip for supplying a current to the welding wire. It is characterized by being formed of a ceramic composite material.

本発明では、溶接ワイヤが挿通され、溶接ワイヤに電流を供給するコンタクトチップを包容するように配置されたシールドノズルを炭素−セラミックス複合材にて形成したので、シールドノズルに対するスパッタの付着を抑制するだけではなく、付着したスパッタの付着力が弱く簡単に剥離することができるので、スパッタの除去作業の間隔長くなるだけではなく、スパッタの除去作業が容易にできるのでシールドノズルの寿命が長くなり、また、シールドノズルは母材の表面に被膜層を形成する必要がないので、シールドノズルを手間と時間が掛らず短時間で製造できるという効果がある。  In the present invention, the shield nozzle, which is inserted so that the welding wire is inserted and encloses the contact tip that supplies current to the welding wire, is formed of the carbon-ceramic composite material, so that the adhesion of spatter to the shield nozzle is suppressed. Not only that, the adhesive force of the attached spatter is weak and it can be easily peeled off, so not only the interval of the spatter removal work becomes longer, but also the spatter removal work can be made easier, so the life of the shield nozzle becomes longer, Further, since it is not necessary to form a coating layer on the surface of the base material of the shield nozzle, there is an effect that the shield nozzle can be manufactured in a short time without labor and time.

本発明の実施の形態の一部を切欠いた図である。It is the figure which cut out some embodiments of the invention. 従来のアーク溶接用トーチの一部を切欠いた図である。It is the figure which notched a part of the conventional torch for arc welding.

以下、本発明の第１の実施の形態について図１に基づいて説明する。
１は導電性に優れた銅、銅合金からなり、先端が先細状のコンタクトチップであり、コンタクトチップ１は、軸方向に溶接ワイヤ２を挿通し、溶接時に溶接ワイヤ２に溶接電流を供給するものである。Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
Reference numeral 1 denotes a contact tip made of copper or copper alloy having excellent conductivity and having a tapered tip. The contact tip 1 penetrates the welding wire 2 in the axial direction and supplies a welding current to the welding wire 2 during welding. Things.

３は導電性に優れた銅、銅合金からなるチップホルダーであり、チップホルダー３は軸方向に溶接ワイヤを挿通するとともに、先端に前記コンタクトチップ１の基端を螺着しており、中央部に炭酸ガス、アルゴンガスと炭酸ガス又は酸素ガスの混合ガス等のシールドガスを供給する複数のガス供給口３ａが形成されている。  Reference numeral 3 denotes a chip holder made of copper or a copper alloy having excellent conductivity. The chip holder 3 has a welding wire inserted in the axial direction and a base end of the contact tip 1 screwed to a tip thereof. Are formed with a plurality of gas supply ports 3a for supplying a shielding gas such as a carbon dioxide gas, a mixed gas of an argon gas and a carbon dioxide gas or an oxygen gas.

４は、先端の取付け部４ａの外側表面にねじ部が螺刻された、略円筒形で絶縁物製のノズルホルダーであり、ノズルホルダー４はチップホルダー３に螺着されている。  Reference numeral 4 denotes a substantially cylindrical nozzle holder made of an insulating material having a thread portion threaded on the outer surface of the mounting portion 4a at the tip. The nozzle holder 4 is screwed to the tip holder 3.

５は炭素−セラミックス複合材（例えば虹技株式会社商品名ＫＣカーボンセラミック）にて成形された略円筒形のシールドノズルであり、シールドノズル５の基端内面の取付け部５ａにはねじが螺刻されており、ノズルホルダー４の先端の取付け部４ａに基端内面の取付け部５ａを螺合して、コンタクトチップ１を包容するようにノズルホルダー４に取付けられ、チップホルダー３のガス供給口３ａから供給されるシールドガスをシールドノズル５とコンタクトチップ１の間の隙間から溶接部に噴出する。  Reference numeral 5 denotes a substantially cylindrical shield nozzle formed of a carbon-ceramic composite material (for example, KC Co., Ltd. under the trade name of Nijigi Co., Ltd.). The mounting portion 5a on the base inner surface is screwed to the mounting portion 4a at the distal end of the nozzle holder 4 to be mounted on the nozzle holder 4 so as to cover the contact tip 1 and from the gas supply port 3a of the chip holder 3. The supplied shielding gas is jetted from the gap between the shield nozzle 5 and the contact tip 1 to the welding portion.

炭素−セラミック複合材である虹技株式会社商品名ＫＣカーボンセラミックは（１）耐熱酸性化（大気雰囲気中で１２００°Ｃ）：黒鉛結晶基地中に存在している微細なセラミックス（炭化珪素ＳｉＣ・炭化ホウ素Ｂ４Ｃ）が高温酸化雰囲気下（６００〜１２００°Ｃ）であたかも油汗をかくように、にじみ出しホウ酸ガラスが生成され、そのホウ酸ガラスがＫＣカーボンセラミックスの全表面に均一で非常に薄い（数μｍ）の保護被膜となって覆い尽くし黒鉛を酸素から遮断することで高性能の耐酸化特性を有し、この保護被膜は、はがれたり取れたりして欠落した場合でも、高温酸化雰囲気下であればすぐさま新しくにじみ出て生成される自己修復機能を発揮し、常に表面にガラコーティングされた状態を保持し、（２）耐熱衝撃性（温度差８００〜１２００°Ｃ）：黒鉛を主体とするので、黒鉛と同様の高い耐熱衝撃性を持っており、（３）硬さ：３５〜４５（Ｈｓ）、（４）黒鉛が主成分：溶融金属が付着し難く、付着しても剥離が弱い力で容易にできる等の特性を有しており、シールドノズル５を炭素−セラミック複合材にて形成することにより、硬度、耐熱性のための被膜層やスパッタ付着防止のための被膜層が不要になる。KC carbon ceramic, which is a carbon-ceramic composite material under the trade name of Nijigi Co., Ltd., is (1) heat-resistant and acidified (1200 ° C. in the atmosphere): fine ceramics (silicon carbide SiC. Boron B 4 C) oozes out under a high-temperature oxidizing atmosphere (600-1200 ° C.) as if it sweats oil, and the borate glass is formed on the entire surface of the KC carbon ceramic. It has a high-performance oxidation-resistant property by covering it as a thin (several μm) protective film and shielding graphite from oxygen. Even if the protective film is peeled off or peeled off, it has a high-temperature oxidation property. Under the atmosphere, it exhibits a self-healing function that is immediately oozed out and generated, and keeps the surface coated at all times. (2) Thermal shock resistance (temperature (Difference 800-1200 ° C): Since it is mainly composed of graphite, it has the same high thermal shock resistance as graphite, (3) hardness: 35-45 (Hs), (4) graphite is the main component: molten Metals are difficult to adhere, and even if they adhere, they have characteristics such as easy peeling with a weak force. By forming the shield nozzle 5 from a carbon-ceramic composite material, hardness and heat resistance are improved. A coating layer and a coating layer for preventing spatter adhesion are not required.

本発明は、前記実施の形態に限定されるものではなく、例えば、ノズルホルダー４にシールドノズル５を取付けるのに螺合ではなくて、ノズルホルダー４の取付け部にＯリングを装着し、シールドノズル５の取付け部に圧入することにより取付けても良い。  The present invention is not limited to the above-described embodiment. For example, instead of screwing the shield nozzle 5 to the nozzle holder 4, an O-ring is attached to the mounting portion of the nozzle holder 4, 5 may be mounted by press-fitting into the mounting portion.

以上のように、本発明によれば、溶接ワイヤ２が挿通され、溶接ワイヤ２に電流を供給するコンタクトチップ１を包容するように配置されたシールドノズル５を炭素−セラミックス複合材にて形成したので、シールドノズル５に対するスパッタの付着を抑制するだけではなく、付着したスパッタを弱い力で簡単に剥離することができるので、スパッタの除去作業の間隔が長くなるだけではなく、スパッタの除去作業が弱い力にて容易にできるのでシールドノズル５の寿命が長くなり、また、シールドノズル５は母材を形成するだけで、表面に被膜層を形成する必要がないので、シールドノズル５を手間と時間が掛らず短時間で製造できる。  As described above, according to the present invention, the shield nozzle 5 in which the welding wire 2 is inserted and the contact tip 1 that supplies current to the welding wire 2 is formed from the carbon-ceramic composite material. Therefore, not only the spatter adhesion to the shield nozzle 5 can be suppressed, but also the spatter that has adhered can be easily peeled off with a weak force. Since the shield nozzle 5 can be easily formed with a weak force, the life of the shield nozzle 5 is prolonged. In addition, since the shield nozzle 5 only forms a base material and does not need to form a coating layer on the surface, the shield nozzle 5 requires time and effort. And can be manufactured in a short time.

１ コンタクトチップ
２ 溶接ワイヤ
３ チップホルダー
４ ノズルホルダー
５ シールドノズルDESCRIPTION OF SYMBOLS 1 Contact tip 2 Welding wire 3 Tip holder 4 Nozzle holder 5 Shield nozzle

Claims (1)

溶接ワイヤが挿通され、溶接ワイヤに電流を供給するコンタクトチップを包容するように配置されたシールドノズルを炭素−セラミックス複合材にて形成したことを特徴とするガスシールドアーク溶接トーチのシールドノズル。    A shield nozzle for a gas shielded arc welding torch, wherein a shield nozzle is formed of a carbon-ceramic composite material, the shield nozzle having a welding wire inserted therein and arranged to enclose a contact tip for supplying a current to the welding wire.
JP2018156717A 2018-08-07 2018-08-07 Shield nozzle of gas shield arc-welding torch Pending JP2020022991A (en)

Priority Applications (2)

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JP2018156717A JP2020022991A (en) 2018-08-07 2018-08-07 Shield nozzle of gas shield arc-welding torch
PCT/JP2019/030423 WO2020031879A1 (en) 2018-08-07 2019-08-02 Welding torch shield nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018156717A JP2020022991A (en) 2018-08-07 2018-08-07 Shield nozzle of gas shield arc-welding torch

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WO (1) WO2020031879A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613522A (en) * 1982-09-29 1986-09-23 Avco Corporation Oxidation resistant carbon-carbon composites
JPS6197378U (en) * 1984-12-02 1986-06-23
US5034593A (en) * 1990-03-23 1991-07-23 W. R. Grace & Co.-Conn. Coated welding cups
JP3506820B2 (en) * 1994-10-11 2004-03-15 日本バイリーン株式会社 Heat-resistant sheet for sputtering and method of using the same
JP4037969B2 (en) * 1998-06-09 2008-01-23 東洋炭素株式会社 Graphite products using boron carbide-coated silicon carbide-carbon composites

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