JPH10216959A - Electrode for resistance welding - Google Patents
Electrode for resistance weldingInfo
- Publication number
- JPH10216959A JPH10216959A JP3333697A JP3333697A JPH10216959A JP H10216959 A JPH10216959 A JP H10216959A JP 3333697 A JP3333697 A JP 3333697A JP 3333697 A JP3333697 A JP 3333697A JP H10216959 A JPH10216959 A JP H10216959A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- copper
- alloy
- silver
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スポット溶接等の
抵抗溶接に用いる電極に関する。The present invention relates to an electrode used for resistance welding such as spot welding.
【０００２】[0002]
【従来の技術】抵抗溶接に用いる電極は当初純銅が使用
されていたが、これは軟らかいために傷みかたがはげし
く、その後いろいろな銅合金が開発されて使用に供せら
れるようになった。例えば銅に約１％のカドミウムを入
れたカドミウム・銅、クロムを０．５〜１．０％入れた
クロム・銅、その他クロムにジルコニウムを入れたクロ
ム・ジルコニウム・銅やジルコニウムだけのジルコニウ
ム・銅、或いは、ベリリュウム、タングステン、コバル
ト等を入れた多種多様な電極が実用されている。2. Description of the Related Art Pure copper was used as an electrode for resistance welding at first. However, since it is soft, it is easily damaged, and thereafter, various copper alloys have been developed and put to use. For example, cadmium / copper containing about 1% cadmium in copper, chromium / copper containing 0.5 to 1.0% chromium, and chromium / zirconium / copper containing zirconium in chromium or zirconium / copper containing only zirconium. Alternatively, a wide variety of electrodes containing beryllium, tungsten, cobalt, and the like have been put to practical use.
【０００３】上記従来使用されている電極は、いずれも
硬さ（耐磨耗性）を重点的に改良することを目的として
いるため、どうしても導電率を犠牲にしなければならな
かった。これらの電極は純銅に比べて７０〜７５％の導
電率で、溶接中電極自体の温度上昇が激しく、特に亜鉛
メッキ鋼板やアルミ材料のスポット溶接の場合、多量の
亜鉛やアルミニウムが電極に凝着するので、ドレッシン
グのためライン停止の回数が増す原因となっていた。[0003] Since the above-mentioned conventional electrodes are all aimed at improving the hardness (abrasion resistance) with emphasis, the conductivity must be sacrificed. These electrodes have an electrical conductivity of 70 to 75% compared to pure copper, and the temperature of the electrodes themselves increases sharply during welding. In the case of spot welding of galvanized steel sheets and aluminum materials, a large amount of zinc and aluminum adhere to the electrodes. Therefore, the number of line stoppages due to dressing has increased.
【０００４】最近、溶接時における電極の先端部の消耗
及び発熱ロスを低減させるため、先端部材を消耗の少な
い材料で、支持部材を発熱の少ないもので構成した溶接
機のチップが公開され（実開平３−９２８２号公報）、
消耗の少ない先端部材としては、タングステン−銅合
金、酸化アルミニウム−銅合金、ＭＣＺ、ベリリウム
銅、アルミニウム−銅合金等、また、支持部材として
は、例えば銅やクロム−銅合金が挙げられている。[0004] Recently, in order to reduce wear and heat loss of the tip of the electrode during welding, a tip of a welding machine in which the tip member is made of a material with little wear and the support member is made of a material with little heat has been disclosed (actually). Japanese Unexamined Patent Publication No. Hei 3-9282),
Tungsten-copper alloys, aluminum oxide-copper alloys, MCZ, beryllium copper, aluminum-copper alloys, and the like are used as the tip members with little wear, and copper and chromium-copper alloys are used as the support members.
【０００５】タングステン−銅合金については、例えば
特開昭５４−４９９４４号公報において、クロム−銅合
金製電極チップの先端部に盲孔を穿ち、そこにタングス
テン−銅合金の丸棒状端子を挿入し一体に固着したスポ
ット溶接機用電極、あるいは実開平４−３９５８３号公
報では、クロム銅または銅製チップ本体の先端部に、銅
−タングステン合金またはタングステン片が埋設され
た、自動車のボデー等の修復用の溶接機用電極チップ等
が公開されている。Regarding the tungsten-copper alloy, for example, in Japanese Patent Application Laid-Open No. 54-49944, a blind hole is formed at the tip of a chromium-copper alloy electrode tip, and a tungsten-copper alloy round bar-shaped terminal is inserted therein. In an electrode for a spot welder integrally fixed, or in Japanese Utility Model Application Laid-Open No. 4-39583, a copper-tungsten alloy or tungsten piece is embedded at the tip of a chromium copper or copper tip body for repairing an automobile body or the like. The electrode tip etc. for welding machines are disclosed.
【０００６】しかしながら、上記のものはいづれも電極
チップの硬度について一般的な要求に応えるもので、電
極チップ本体もクロム−銅合金を用いるものが主体であ
ってしかもいづれもクロム−銅合金の電極チップ本体に
硬質化した異種金属の切片を単に嵌め込んだものであ
り、機械的強度にも問題があり、特に導電率を犠牲にす
ることは止むを得ないものであった。However, all of the above-mentioned ones meet the general requirements for the hardness of the electrode tip, and the main body of the electrode tip is mainly made of a chromium-copper alloy. It is simply a piece of hardened dissimilar metal inserted into the chip body, and has a problem in mechanical strength. In particular, it has been inevitable to sacrifice conductivity.
【０００７】[0007]
【発明が解決しようとする課題】本発明は上記従来の事
情に鑑みてなされたもので、導電性をよくして、溶接時
の発熱を少なくし、亜鉛めっき鋼板および特にアルミ材
料へのスポット溶接を行うとき、アルミニウムが電極側
へ凝着することを著しく減少させて、電極のドレッシン
グ回数を少なくして溶接作業効率を向上させ、かつ電極
チップの先端部が十分に融合して合金化されてその組織
が均等に分散しており、機械的強度が大きくかつ高品質
の抵抗溶接用電極を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has improved conductivity, reduces heat generation during welding, and spot-welds galvanized steel sheets and particularly aluminum materials. When performing, significantly reduce the adhesion of aluminum to the electrode side, reduce the number of times of electrode dressing, improve welding work efficiency, and the tip of the electrode tip is sufficiently fused and alloyed An object of the present invention is to provide a high-quality electrode for resistance welding in which the structure is uniformly dispersed, the mechanical strength is large, and the quality is high.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
めの本発明による抵抗溶接用電極は、純銅製電極または
銅合金製電極の先端部が、電極本体の純銅または銅合金
と銀、ニッケルまたはアルミニウムとを真空中でレーザ
ービームもしくは電子ビームにより融合して合金化さ
れ、組織が均一に分散されている合金部を形成している
ことを特徴とする。According to the present invention, there is provided an electrode for resistance welding according to the present invention, wherein the tip of a pure copper electrode or a copper alloy electrode is made of pure copper or a copper alloy and silver or nickel. Alternatively, the alloy is formed by fusing aluminum with a laser beam or an electron beam in a vacuum to form an alloy portion in which the structure is uniformly dispersed.
【０００９】[0009]
【発明の実施の形態】上記の本発明による抵抗溶接用電
極の実施の形態の一例を図１に示す。図１は本発明によ
る抵抗溶接用電極の断面図である。図１において、１は
純銅または銅合金の電極本体、この電極本体１の先端部
２は合金部である。合金部２は数％の銀を含む銅−銀合
金（Ｃｕ−Ａｇ）からなり、電極本体１の銅の中に銀が
図１に示した形に均一に分散していることがＥＰＭＡ
（Ｅｌｅｃｔｒｏｎ ｐｒｏｂｅｍｉｃｒｏａｎａｌｙ
ｓｅｒ）によって確認されている。FIG. 1 shows an example of an embodiment of the above-described resistance welding electrode according to the present invention. FIG. 1 is a sectional view of an electrode for resistance welding according to the present invention. In FIG. 1, reference numeral 1 denotes an electrode body made of pure copper or a copper alloy, and a tip 2 of the electrode body 1 is an alloy part. The alloy part 2 is made of a copper-silver alloy (Cu-Ag) containing a few percent of silver, and EPMA indicates that silver is uniformly dispersed in the copper of the electrode body 1 in the shape shown in FIG.
(Electron probemicroanaly
ser).
【００１０】この銅−銀合金部２は、電極本体１の先端
部に銀板の小片を載せ、真空中（１０-4Ｔｏｒｒ以
下）、上方からレーザービームまたは電子ビームを照射
して銅と銀板とを同時に融合させて合金化させたもので
ある。In the copper-silver alloy part 2, a small piece of a silver plate is placed on the tip of the electrode body 1 and irradiated with a laser beam or an electron beam from above in a vacuum (10 -4 Torr or less). It is made by fusing the plate and alloying at the same time.
【００１１】合金部２の銀の含有量としては０．１〜
１．２％が好適である。銀の含有量が０．１％未満で
は、合金化したとき強度および耐熱性が充分でなく、ま
た１．２％を越えると、銀の含有量が多くなって軟化点
が低下するため好ましくない。The silver content of the alloy part 2 is 0.1 to
1.2% is preferred. If the silver content is less than 0.1%, strength and heat resistance when alloyed are not sufficient, and if it exceeds 1.2%, the silver content increases and the softening point decreases, which is not preferable. .
【００１２】また、本発明によれば、上記銀のかわりに
アルミニウムおよびニッケルを用いることもできる。そ
の場合は合金部２の組成は、銅−アルミニウム合金（Ｃ
ｕ−Ａｌ）、銅−ニッケル合金（Ｃｕ−Ｎｉ）等であ
る。この場合のアルミニウムおよびニッケルの好適な含
有量は前記銀の場合と略同様であるが、ニッケルやアル
ミニウムを使用した場合は、その含有量の増加と共に硬
度は増加するが導電率は低下するため、１．２％を超え
ることは好ましくない。According to the present invention, aluminum and nickel can be used instead of silver. In that case, the composition of the alloy part 2 is a copper-aluminum alloy (C
u-Al) and a copper-nickel alloy (Cu-Ni). The preferred content of aluminum and nickel in this case is substantially the same as the case of silver, but when nickel or aluminum is used, the hardness increases with an increase in the content, but the conductivity decreases. It is not preferable to exceed 1.2%.
【００１３】上記ニッケルまたはアルミニウムを銅と合
金化する場合も、前記銀の場合と同様に、電極本体１の
先端部にニッケルまたはアルミニウムの小片を載せ、真
空中でレーザービームまたは電子ビームにより融合させ
て合金化し、図１と同じ形の合金部２を形成することが
できる。When nickel or aluminum is alloyed with copper, a small piece of nickel or aluminum is placed on the tip of the electrode body 1 and fused with a laser beam or an electron beam in a vacuum as in the case of silver. To form an alloy part 2 having the same shape as that of FIG.
【００１４】本発明による電極本体１は先端部が均一に
合金化されているので、上記のように融合させる材質を
変えることにより硬度が変わり、電極自体の耐磨耗性を
変えることができる。Since the tip of the electrode body 1 according to the present invention is uniformly alloyed, the hardness can be changed by changing the material to be fused as described above, and the wear resistance of the electrode itself can be changed.
【００１５】本発明による電極本体１はまた、純銅に代
えて銅合金を使用することもできる。銅合金としてはク
ロム−銅（Ｃｕ−Ｃｒ）、ベリリウム−銅（Ｃｕ−Ｂ
ｅ）等が挙げられる。これらの銅合金を電極本体１とし
て用いる場合にも、純銅の場合と同様にして先端に合金
部２を形成することができ、それぞれ各成分が均一分散
した合金、例えば銅−銀−クロム（Ｃｕ−Ａｇ−Ｃ
ｒ）、銅−銀−ベリリウム（Ｃｕ−Ａｇ−Ｂｅ）、銅−
アルミニウム−クロム（Ｃｕ−Ａｌ−Ｃｒ）、銅−ニッ
ケル−ベリリウム（Ｃｕ−Ｎｉ−Ｂｅ）等の合金が生成
し、銀の合金と同様の効果を現す。勿論、電極本体とし
ては銅を用いる場合、導電率が最もよいことは言うまで
もない。The electrode body 1 according to the present invention can also use a copper alloy instead of pure copper. Chromium-copper (Cu-Cr), beryllium-copper (Cu-B)
e) and the like. When these copper alloys are used as the electrode main body 1, the alloy portion 2 can be formed at the tip similarly to the case of pure copper, and an alloy in which each component is uniformly dispersed, for example, copper-silver-chromium (Cu -Ag-C
r), copper-silver-beryllium (Cu-Ag-Be), copper-
Alloys such as aluminum-chromium (Cu-Al-Cr) and copper-nickel-beryllium (Cu-Ni-Be) are produced, and exhibit the same effects as silver alloys. Needless to say, when copper is used for the electrode body, the conductivity is the best.
【００１６】なお、図１において３は電極１のホルダー
で、凸部４を電極１に設けた凹部に挿入して締結できる
ようにわづかにテーパー５が付けてあり、また、ホルダ
ー３の先端には冷却用水路６が設けられている。In FIG. 1, reference numeral 3 denotes a holder for the electrode 1, which is slightly tapered so that the protrusion 4 can be inserted into a recess provided in the electrode 1 and fastened. Is provided with a cooling water passage 6.
【００１７】[0017]
【実施例】以下、実施例に基づいて本発明による抵抗溶
接用電極を具体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electrode for resistance welding according to the present invention will be described in detail based on embodiments.
【００１８】実施例１．銅−クロム合金製電極チップ１
の先端部に銀板の小片を載せ、真空中（１０-4Ｔｏｒｒ
以下）において上方から電子ビームを当て、銀を電極チ
ップ１の銅−クロム合金と融合させて本発明による組成
の均一に分散したＣｕ−Ｃｒ−Ａｇ合金部２を形成し
た。この合金部２の銀の含有量は０．９％であった。図
２はこのＣｕ−Ａｇ−Ｃｒ合金部２のＥＰＭＡ図であ
る。Embodiment 1 FIG. Copper-chromium alloy electrode tip 1
Place a small piece of silver plate of the front end portion, in a vacuum (10 -4 Torr
In the following), an electron beam was applied from above, and silver was fused with the copper-chromium alloy of the electrode tip 1 to form a Cu—Cr—Ag alloy part 2 having a uniformly dispersed composition according to the present invention. The silver content of the alloy part 2 was 0.9%. FIG. 2 is an EPMA diagram of the Cu-Ag-Cr alloy part 2.
【００１９】この電極を用いて亜鉛めっき鋼板をスポッ
ト溶接し、従来の電極を用いて同様に亜鉛めっき鋼板を
スポット溶接した場合と、ドレッシングを必要とするま
での時間あるいは一定時間使用した場合のドレッシング
回数を比較した。その結果、Ｃｕ−Ａｇ−Ｃｒ合金部２
を形成した本発明の電極を用いた場合、従来の電極を用
いた場合と比較して、ドレッシングを必要とするまでの
時間が長くなり、一定時間使用した場合のドレッシング
回数が減少した。A galvanized steel sheet is spot-welded using this electrode, and a galvanized steel sheet is similarly spot-welded using a conventional electrode, and a dressing for a time required for dressing or when used for a fixed time. The times were compared. As a result, the Cu-Ag-Cr alloy part 2
When the electrode of the present invention was used, the time required for dressing was longer, and the number of times of dressing when the electrode was used for a certain time was reduced as compared with the case where a conventional electrode was used.
【００２０】[0020]
【発明の効果】以上説明したように、本発明による抵抗
溶接用電極は上記の構成であるから、電極チップに純銅
もしくは銅合金を使用することができ、かつ先端の合金
部は本体と完全に融合しているので導電性が極めてよ
く、溶接時の発熱が少ないので、亜鉛めっき鋼板および
特にアルミ材料へのスポット溶接を行うとき、アルミニ
ウムが電極側へ凝着することを著しく減少させて、電極
のドレッシング回数を少なくすることにより溶接作業効
率を向上させ、かつ電極チップの先端部の組織が均等に
分散しており、機械的強度も十分な高品質の抵抗溶接用
電極を提供するものである。As described above, since the resistance welding electrode according to the present invention has the above-described structure, pure copper or a copper alloy can be used for the electrode tip, and the alloy part at the tip is completely formed with the main body. Since it is fused, the conductivity is extremely good and the heat generated during welding is small, so when performing spot welding on galvanized steel sheets and especially on aluminum materials, the adhesion of aluminum to the electrode side is significantly reduced, To improve the welding work efficiency by reducing the number of times of dressing, and to provide a high quality resistance welding electrode with sufficient mechanical strength in which the structure of the tip of the electrode tip is evenly dispersed. .
【００２１】さらに、本発明による抵抗溶接用電極は、
合金部に融合させる材質を変えることにより硬度が変わ
り、電極自体の耐磨耗性を変えることができる。Further, the electrode for resistance welding according to the present invention comprises:
By changing the material fused to the alloy portion, the hardness changes, and the wear resistance of the electrode itself can be changed.
【図１】本発明による抵抗溶接用電極の断面図FIG. 1 is a sectional view of an electrode for resistance welding according to the present invention.
【図２】Ｃｕ−Ａｇ−Ｃｒ合金部のＥＰＭＡ図FIG. 2 is an EPMA diagram of a Cu—Ag—Cr alloy part.
１ 電極本体 ２ 合金部 ３ ホルダー ４ 凸部 ５ テーパー部 ６ 冷却水路 DESCRIPTION OF SYMBOLS 1 Electrode main body 2 Alloy part 3 Holder 4 Convex part 5 Taper part 6 Cooling channel
Claims (1)
が、該電極の純銅または銅合金と銀、ニッケルまたはア
ルミニウムとを真空中で、レーザービームもしくは電子
ビームにより融合して合金化され、組織が均一に分散し
ている合金部を形成していることを特徴とする抵抗溶接
用電極。1. A tip of a pure copper electrode or a copper alloy electrode is alloyed by fusing pure copper or a copper alloy of the electrode and silver, nickel or aluminum with a laser beam or an electron beam in a vacuum, An electrode for resistance welding, wherein an alloy portion in which the structure is uniformly dispersed is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3333697A JPH10216959A (en) | 1997-01-31 | 1997-01-31 | Electrode for resistance welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3333697A JPH10216959A (en) | 1997-01-31 | 1997-01-31 | Electrode for resistance welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10216959A true JPH10216959A (en) | 1998-08-18 |
Family
ID=12383733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3333697A Withdrawn JPH10216959A (en) | 1997-01-31 | 1997-01-31 | Electrode for resistance welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10216959A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2364875A (en) * | 2000-07-10 | 2002-02-06 | Tetronics Ltd | A plasma torch electrode |
| US6744006B2 (en) | 2000-04-10 | 2004-06-01 | Tetronics Limited | Twin plasma torch apparatus |
| US6796107B2 (en) | 2000-02-29 | 2004-09-28 | Tetronics Limited | Method and apparatus for packaging ultra fine powders into containers |
| US7022155B2 (en) | 2000-02-10 | 2006-04-04 | Tetronics Limited | Plasma arc reactor for the production of fine powders |
| US7592566B2 (en) * | 2001-12-28 | 2009-09-22 | Abb S.P.A. | Method for welding contact plates and contact elements obtained with the method |
| KR102050668B1 (en) * | 2018-06-26 | 2019-12-03 | 한국생산기술연구원 | Electrode for resistance welding |
-
1997
- 1997-01-31 JP JP3333697A patent/JPH10216959A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7022155B2 (en) | 2000-02-10 | 2006-04-04 | Tetronics Limited | Plasma arc reactor for the production of fine powders |
| US7727460B2 (en) | 2000-02-10 | 2010-06-01 | Tetronics Limited | Plasma arc reactor for the production of fine powders |
| US6796107B2 (en) | 2000-02-29 | 2004-09-28 | Tetronics Limited | Method and apparatus for packaging ultra fine powders into containers |
| US6744006B2 (en) | 2000-04-10 | 2004-06-01 | Tetronics Limited | Twin plasma torch apparatus |
| GB2364875A (en) * | 2000-07-10 | 2002-02-06 | Tetronics Ltd | A plasma torch electrode |
| US7592566B2 (en) * | 2001-12-28 | 2009-09-22 | Abb S.P.A. | Method for welding contact plates and contact elements obtained with the method |
| KR102050668B1 (en) * | 2018-06-26 | 2019-12-03 | 한국생산기술연구원 | Electrode for resistance welding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20040406 |