JPS61253184A - Welding tip - Google Patents

Welding tip

Info

Publication number
JPS61253184A
JPS61253184A JP9499385A JP9499385A JPS61253184A JP S61253184 A JPS61253184 A JP S61253184A JP 9499385 A JP9499385 A JP 9499385A JP 9499385 A JP9499385 A JP 9499385A JP S61253184 A JPS61253184 A JP S61253184A
Authority
JP
Japan
Prior art keywords
tip
welding
hole
end tip
fastening
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
JP9499385A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kakehashi
梯 博幸
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.)
KYUSHU SEKISUI KOGYO KK
Original Assignee
KYUSHU SEKISUI KOGYO KK
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 KYUSHU SEKISUI KOGYO KK filed Critical KYUSHU SEKISUI KOGYO KK
Priority to JP9499385A priority Critical patent/JPS61253184A/en
Publication of JPS61253184A publication Critical patent/JPS61253184A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the falling of the tip end with the heating by an arc during the welding work by fitting the end tip with pressure in the state of fastening to the engaging hole of the main body of the tip. CONSTITUTION:An end tip 2 is formed in the cylindrical shape having a flange 11 at one part and the thickness t1 of the cylindrical part is taken as less than the thickness t2 of the engaging hole 5. The guide hole 12 provided on the shaft center is formed in the same diameter as that of a inserting hole 3 and the flange surface 10 is finished in a mirror face. The outer diameter of the end tip 2 is formed so that the fastening allowance for the inner diameter of the engaging hole 5 becomes in about zero. The end tip 2 is fitted in the state of coinciding the guide hole 12 with an inserting hole 3 to the engaging hole 5 of the tip main body 1 with the fastening-fit by pressure. The fastening allowance is thus set more than the gap caused by the difference in the thermal expansion rates of the tip main body and end tip and the chattering and falling of the end tip is prevented.

Description

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) 本発明は、溶接ワイヤ自動送給式のアーク溶接機のトー
チに取付けられる溶接チップ、特にチップ本体に対する
先端チップの取付は技術に関する。 (従来の技術) 近年の鋼製品の組立てにおいては、溶接継手が多用され
、それには溶接ワイヤ自動送給式のアーク溶接機が多く
使用されている。 この種のアーク溶接機は、フィル状に巻取られた別置の
溶接ワイヤを電動装置等で直線状に繰り出しながら送給
し、これをトーチに取付けた溶接チップの挿入孔に挿通
させて一定の送給方向を確保し、かつ溶接ワイヤを前記
溶接子ノブの挿入孔の内壁に接触させることによって溶
接チップから溶接ワイヤに溶接電流を通電し、溶接チン
プ先端部で、溶接ワイヤと母材との間にアークを発生さ
せて溶接するように形成されている。 前記溶接チップは、電導率のよい銅や銅合金で形成する
ものであるが、溶接ワイヤが常時摺接することから、溶
接チップの挿入孔、特に先端部分が激しく摩耗し、この
摩耗によって溶接ワイヤに遊びが生じるため、アークの
乱れ、溶接部の脚長の不揃い、溶は込み不足、ビートの
乱れ等の溶接欠陥が生じたり、溶接ワイヤと挿入孔の隙
間にスパンタが侵入しこれが溶接ワイヤの送給を停止さ
せ、溶接が中断してしまう等のトラブルが発生していた
。 このようなことから、従来の溶接チップでは、チップ本
体の先端に、耐熱耐摩耗性素材、例えば銅およびタング
ステンよりなる焼結合金やセラミツク等による先端子ン
グを取付けるようにしていた。 そして、この先端チップの取付は構造としては、チップ
本体の先端に嵌合穴を形成し、この嵌合穴に先端チップ
を嵌め込んで、これを有機質の接着剤により固着させた
り、或いは、実開昭52−26630号公報に示すよう
に、ネジ込みによって固着させるものが知られている。 (発明か解決しようとする問題点) しかしながら、従来のように先端チップを有機質の接着
剤やネジ込みによって固着させるものでは、溶接電流値
が20OAから30OAで使用される時の溶接チップの
温度が170°Cから230°Cとなることから、溶接
チップと焼結合金との熱膨張率の違いによって取付部に
隙間が生じると共に、有機質の接着剤の耐熱温度(略2
00℃)が低いために、接着面が剥離してしまい、この
結果、先端子ノブが脱落したり、〃夕が生じてしまうと
いう問題があった。 (問題点を解決するための手段) 本発明は、かがる従来の問題点を解決するためになされ
たちので、このための技術的手段として本発明では、 チップ本体の先端に、耐熱耐摩耗性を有する先端チップ
が装着された溶接チップにおいて、前記チップ本体の先
端面に嵌合穴を形成し、該嵌合穴に先端チップを圧入に
よつ締り嵌め状態に嵌着した構成を採用することとした
。 (作用) 従って、本発明の溶接チップでは、チップ本体の先端
(Industrial Field of Application) The present invention relates to a welding tip attached to a torch of an automatic welding wire feeding type arc welding machine, and particularly to a technique for attaching a tip to a tip body. (Prior Art) In recent years, welded joints are often used in the assembly of steel products, and arc welding machines with automatic welding wire feeding are often used for this purpose. This type of arc welding machine uses a separately placed welding wire wound into a fill shape to feed it in a straight line using an electric device, etc., and then inserts it into the insertion hole of a welding tip attached to a torch. The welding wire is brought into contact with the inner wall of the insertion hole of the welding tip, and the welding current is passed from the welding tip to the welding wire. It is designed to weld by generating an arc between the two. The welding tip is made of copper or copper alloy, which has good electrical conductivity, but because the welding wire is constantly in sliding contact with the welding tip, the insertion hole of the welding tip, especially the tip, is severely worn, and this wear causes the welding wire to become damaged. Because of the play, welding defects such as arc disturbance, uneven weld leg length, insufficient penetration, and irregular beats may occur, and the spanner may enter the gap between the welding wire and the insertion hole, which may cause problems in the welding wire feed. This caused problems such as stopping the machine and interrupting welding. For this reason, in conventional welding tips, a tip ring made of a heat-resistant and wear-resistant material, such as a sintered alloy made of copper and tungsten, or ceramic, is attached to the tip of the tip body. The structure for attaching this tip is to form a fitting hole at the tip of the tip body, fit the tip into the fitting hole, and fix it with an organic adhesive, or to As shown in Japanese Patent Application Laid-Open No. 52-26630, there is known a device that is fixed by screwing. (Problem to be solved by the invention) However, in the conventional method in which the tip is fixed with an organic adhesive or screwed in, the temperature of the welding tip when used at a welding current value of 20OA to 30OA is low. Since the temperature ranges from 170°C to 230°C, a gap will be created in the mounting part due to the difference in thermal expansion coefficient between the welding tip and the sintered alloy, and the heat resistance temperature of the organic adhesive (approximately 2
Since the temperature (00°C) is low, the adhesive surface peels off, resulting in problems such as the tip knob falling off and causing cracks. (Means for Solving the Problems) The present invention has been made to solve the conventional problems of bending.As a technical means for this purpose, the present invention provides a heat-resistant and wear-resistant material at the tip of the tip body. In the welding tip equipped with a distal end tip having properties, a fitting hole is formed in the distal end surface of the tip body, and the distal tip is press-fitted into the fitting hole in a tight fit state. I decided to do so. (Function) Therefore, in the welding tip of the present invention, the tip of the tip body


二嵌合穴を形成し、該嵌合穴に先端チップを圧入により
締り嵌め状態に嵌着するために、チップ本体と先端チッ
プの熱膨張率の違いによって生じる隙間以上に締め代か
設定されることになり、先端チップがガタ付いたり、脱
落することはない。 又、先端チップか耐熱耐摩耗性を有しているので、熱に
よる変形や破壊もなく、又、溶接ワイヤの摺接による先
端チップの摩耗もなく、溶接ワイヤを常に一定方向に正
常に繰I)出すことができる。 (実施例) 以下、本発明の実施例を図面に示して説明する。 この実施例の溶接チップAは、チップ本体1と、先端チ
ップ2と、から構成されている。 チップ本体1は、銅クロム合金で略棒状に形成され、細
心には挿入孔3が貫通して形I&、され、かつ先端側は
円筒状に形成され、その先端面4には、前記挿入孔3と
同軸の嵌合穴5が形成され、又、基端には段部6を介し
て雄ネックが突設され、該雄ネノ7の先端面8にはテー
パガイド穴9が形成されている。 前記先端チップ2は、純度99.5%程度のアルミナ系
セラミックスで、7ランノ11を一方に有した円筒状に
形成され、円筒部の肉厚t、が嵌合穴5の肉厚E2以下
とされ、かつ細心に設けたガイド穴12は前記挿入孔3
の直径と同一に形成され、かつ7ランノ面10は鏡面仕
上げされている。 尚、この先端チ・/プ2の外径は、前記嵌合穴5の内径
に対する締め代が丁度ゼロ程度になるように形成されて
いる。 前言−牛端千1.プ21十 匡λを一層ふ縞d1↓めで
チップ本体1の嵌合穴5に〃イド穴12を挿入孔3に符
合させる状態で嵌着される。 又、実施例では、チップ本体1の先端面・↓と、先端チ
ップ2の7ランノ11の内面11aと、の合せ面にシリ
カ系無機質の接着剤20(耐熱温度400°C)が塗布
されており、これにより先端チップ2は一層強固に固着
される。 尚、図において、13はコイル状に巻取った溶接ワイヤ
、14は該溶接ワイヤ13の先端、15は前記溶接ワイ
ヤ13の電動送給装置、16はトーチ、17はトーチ1
6のノズルである。 次lこ、本実施例の作用を、先端チップ2が半自動溶接
機に取付られた場合で説明する。 溶接チップAをトーチ16内に雄ネノ7で取付け、この
状態で電動送給装置15を作動させると、該電動送給装
置15により溶接ワイヤ13がトーチ16に送給され、
引き続きテーパガイド穴9に案内されながらチップ本体
1の挿入孔3に挿通されると共に、先端チップ2の〃イ
ド穴12に挿通され、そして先端チップ2の7ランノ面
10から溶接ワイヤ13の先′414を突出させた状態
で溶接が行われることになる。 この溶接時において、溶接チップAの先端は約170°
C〜230°Cに加熱されることになるが、先端チップ
2は、締め代ゼロでチップ本体1に締り嵌め状態に嵌着
されているので、先端チップ2とチップ本体】の熱膨張
率の違いにより生ずる隙間を締め代によって吸収するこ
とができ、従って、溶接作業時に先端チップ2が緩んで
脱落するということはない。 又、前記先端チップ2を耐熱耐摩耗性を有するアルミナ
系のセラミックスで形成したので、溶接作業時の高温で
先端チップが変形したり、劣化したりすることもなく、
又溶接ワイヤ13が先端チップ2の〃イド穴12に摺接
しても該〃イド穴12が摩耗することがないので、これ
まで−日に2.3回取替えなければならなかったものが
3ケ月は使用でき、その耐用寿命を大幅に向上すること
ができる。 又、〃イド穴12の摩耗がないので溶接ワイヤ13か振
れることなく常に一定方向に繰り出され、母材との間に
適正なアークが形成され、脚長の不揃いや溶は込み不足
、ビートの乱れ等の欠陥を生じることがない。 又、先端チップ2の7ランノ面10を鏡面に研磨したの
で、又パンクが晴着しにくく、ブイド穴12にスパッタ
か侵入して〃イド穴12と)8接ワイヤ13との隙間に
食い込むことがないので、溶接途中で溶接ワイヤ13の
繰り出しが停止して溶接が中断することもない。 以上、本発明の実施例を図面により説明しrこが、本発
明の具体的な構成はこの実施例に限定されるものではな
く、発明の要旨を逸脱しない範囲の設計変更等があって
も本発明の技術的範囲に含まれる。 例えば、本実施例では、先端チップをアルミナ系のセラ
ミックスで形成したが、これに限らずノルコニア等の池
のセラミックス、銅とタングステン等の合金を使用する
ことも可能である。 又、実施例では締め代をゼロに設定したか、これに限ら
れることはなく、0〜0.01化程度の締め代を一応の
範囲としている。 又、実施例では、チップ本体の先端面と、先端チップの
7ランジ内面と、の間に無機質の接着剤を塗付したが、
この接着剤による接合は必ずしも必要でない。 又、@4図に示すように先端チップ21の端面に7ラン
ノ面を形成しないで、チップ本体1の先端面22と先端
チップ21の先端面23が均−面になるように形成して
も良い。 (発明の効果) 以上説明したように本発明によれば、先端チップを圧入
によりチップ本体の嵌合穴に締り嵌め状態に嵌着させた
ので、溶接作業中にアークによる加熱によって先端子ノ
ブが脱落するといった不都合がない。 又、先端チップは耐熱耐摩耗性を有するので、アークに
よる高温に晒されても、変形したり劣化したりすること
がなく、又、溶接ワイヤの摺接によっても先端チップが
摩耗しないので、溶接ワイヤは振れることなく正確な位
置に繰り出され、母材との間で適正なアークを形成して
欠陥のない溶接を長期に亘って行なうことができる。
[
In order to form two fitting holes and press fit the tip into the fitting hole in an interference fit state, the interference is set to be greater than the gap created by the difference in thermal expansion coefficient between the tip body and the tip. As a result, the tip will not wobble or fall off. In addition, since the tip has heat and abrasion resistance, there is no deformation or breakage due to heat, and there is no wear of the tip due to sliding contact of the welding wire, so the welding wire can always be rotated normally in a fixed direction. ) can be issued. (Example) Hereinafter, an example of the present invention will be described with reference to the drawings. The welding tip A of this embodiment is composed of a tip body 1 and a distal tip 2. The tip body 1 is made of a copper chromium alloy and is formed into a substantially rod shape, with an insertion hole 3 passing through it in a shape of I&, and the tip side thereof being formed in a cylindrical shape. A fitting hole 5 coaxial with 3 is formed, and a male neck is protruded from the base end through a step 6, and a tapered guide hole 9 is formed in the distal end surface 8 of the male neck 7. . The tip tip 2 is made of alumina-based ceramics with a purity of about 99.5%, and is formed into a cylindrical shape with 7 runs 11 on one side, and the wall thickness t of the cylindrical portion is equal to or less than the wall thickness E2 of the fitting hole 5. The guide hole 12, which is carefully provided, is connected to the insertion hole 3.
, and the seven run surfaces 10 are mirror-finished. The outer diameter of the distal end tip 2 is formed such that the interference with respect to the inner diameter of the fitting hole 5 is approximately zero. Foreword - Sen Ushibata 1. The chip 210 is fitted into the fitting hole 5 of the chip body 1 with the width d1↓ of the end hole 12 aligned with the insertion hole 3. In addition, in the embodiment, a silica-based inorganic adhesive 20 (heat resistant temperature 400°C) is applied to the mating surface of the tip surface ↓ of the tip body 1 and the inner surface 11a of the 7-run no. 11 of the tip tip 2. As a result, the distal tip 2 is fixed even more firmly. In the figure, 13 is a welding wire wound into a coil, 14 is the tip of the welding wire 13, 15 is an electric feeding device for the welding wire 13, 16 is a torch, and 17 is the torch 1.
6 nozzles. Next, the operation of this embodiment will be explained in the case where the tip 2 is attached to a semi-automatic welding machine. When the welding tip A is attached to the torch 16 with the male thread 7 and the electric feeding device 15 is operated in this state, the welding wire 13 is fed to the torch 16 by the electric feeding device 15.
Subsequently, the tip is inserted into the insertion hole 3 of the tip body 1 while being guided by the taper guide hole 9, and is also inserted into the side hole 12 of the distal tip 2, and then the tip of the welding wire 13 is inserted from the run surface 10 of the distal tip 2. Welding will be performed with 414 protruding. During this welding, the tip of welding tip A is approximately 170°
The tip tip 2 is tightly fitted into the tip body 1 with zero interference, so the coefficient of thermal expansion between the tip tip 2 and the tip body is The gap caused by the difference can be absorbed by the interference, so that the tip 2 will not loosen and fall off during welding work. In addition, since the tip 2 is made of alumina-based ceramics that are heat-resistant and wear-resistant, the tip will not be deformed or deteriorated at high temperatures during welding work.
In addition, even when the welding wire 13 slides into contact with the id hole 12 of the tip 2, the id hole 12 does not wear out, so instead of having to replace it 2.3 times a day, it now takes 3 months. can be used, and its service life can be greatly improved. In addition, since there is no wear of the welding hole 12, the welding wire 13 is always fed out in a fixed direction without swinging, and an appropriate arc is formed between it and the base metal, preventing irregular leg lengths, insufficient penetration, and irregular beats. No such defects will occur. In addition, since the 7-run surface 10 of the distal tip 2 is polished to a mirror surface, punctures are less likely to adhere, and spatter can enter the void hole 12 and bite into the gap between the void hole 12 and the 8-contact wire 13. Therefore, there is no possibility that welding wire 13 stops feeding out during welding and welding is interrupted. The embodiments of the present invention have been described above with reference to the drawings.However, the specific configuration of the present invention is not limited to these embodiments, and design changes may be made without departing from the gist of the invention. It is within the technical scope of the present invention. For example, in this embodiment, the tip is made of alumina-based ceramics, but the tip is not limited to this, and it is also possible to use ceramics such as norconia, or alloys of copper and tungsten. Further, in the embodiment, the interference is set to zero, but the interference is not limited to this, and the interference is set within the range of about 0 to 0.01. In addition, in the example, an inorganic adhesive was applied between the tip surface of the tip body and the inner surface of the 7 langes of the tip.
This adhesive bonding is not necessarily required. Also, as shown in Figure @4, the 7-run surface is not formed on the end surface of the tip 21, but the tip surface 22 of the tip body 1 and the tip surface 23 of the tip 21 are formed to be an even surface. good. (Effects of the Invention) As explained above, according to the present invention, the tip is press-fitted into the fitting hole of the tip body in a tight fit state, so that the tip knob is heated by the arc during welding work. There is no inconvenience such as falling off. In addition, the tip has heat and wear resistance, so it will not deform or deteriorate even when exposed to high temperatures caused by an arc, and the tip will not wear out even when the welding wire slides into contact with it, so it can be used for welding. The wire is fed out to a precise position without wobbling, and a proper arc is formed with the base metal, allowing defect-free welding to be performed over a long period of time.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明実施例の溶接チップを示す断面図、第2
図は該溶接チップの斜視図、@3図は溶接ワイヤをトー
チに送給する説明図、第4図は先端チップの他側を示す
一部断面図である。 A:溶接チップ 1:チップ本体 2:先端チップ 4:先端面 5:嵌合穴
Fig. 1 is a sectional view showing a welding tip according to an embodiment of the present invention;
Figure 3 is a perspective view of the welding tip, Figure 3 is an explanatory view of feeding the welding wire to the torch, and Figure 4 is a partially sectional view showing the other side of the tip. A: Welding tip 1: Tip body 2: Tip tip 4: Tip surface 5: Fitting hole

Claims (1)

【特許請求の範囲】[Claims] 1)チップ本体の先端に、耐熱耐摩耗性を有する先端チ
ップが装着された溶接チップにおいて、前記チップ本体
の先端面に嵌合穴を形成し、該嵌合穴に先端チップを圧
入により締り嵌め状態に嵌着したことを特徴とした溶接
チップ。
1) In a welding tip in which a heat-resistant and abrasion-resistant tip is attached to the tip of the tip body, a fitting hole is formed in the tip surface of the tip body, and the tip is press-fitted into the fitting hole for tight fit. A welding tip characterized by being fitted in a state.
JP9499385A 1985-05-02 1985-05-02 Welding tip Pending JPS61253184A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9499385A JPS61253184A (en) 1985-05-02 1985-05-02 Welding tip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9499385A JPS61253184A (en) 1985-05-02 1985-05-02 Welding tip

Publications (1)

Publication Number Publication Date
JPS61253184A true JPS61253184A (en) 1986-11-11

Family

ID=14125395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9499385A Pending JPS61253184A (en) 1985-05-02 1985-05-02 Welding tip

Country Status (1)

Country Link
JP (1) JPS61253184A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399334A2 (en) * 1989-05-23 1990-11-28 Matsushita Electric Industrial Co., Ltd. Method of producing contact tip
JP2011073032A (en) * 2009-09-30 2011-04-14 Daihen Corp Consumable electrode gas shielded arc welding torch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399334A2 (en) * 1989-05-23 1990-11-28 Matsushita Electric Industrial Co., Ltd. Method of producing contact tip
JP2011073032A (en) * 2009-09-30 2011-04-14 Daihen Corp Consumable electrode gas shielded arc welding torch

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