JP2006339185A - Method of welding lead terminal for capacitor - Google Patents

Method of welding lead terminal for capacitor Download PDF

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JP2006339185A
JP2006339185A JP2005158428A JP2005158428A JP2006339185A JP 2006339185 A JP2006339185 A JP 2006339185A JP 2005158428 A JP2005158428 A JP 2005158428A JP 2005158428 A JP2005158428 A JP 2005158428A JP 2006339185 A JP2006339185 A JP 2006339185A
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gas
wire
welding
lead
lead wire
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JP4497478B2 (en
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Osamu Kamiya
修 神谷
Shigehiro Morikawa
茂弘 森川
Tatsuro Kubonai
達郎 久保内
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Nippon Chemi Con Corp
Akita University NUC
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Nippon Chemi Con Corp
Akita University NUC
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13Energy storage using capacitors

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of welding a lead terminal for a capacitor by which the generation of whisker can be prevented by blocking the growth of whisker in a welding process where a whisker generation factor is formed. <P>SOLUTION: The tip end of a lead wire (CP wire) 8 and that of a round bar of an aluminum tab 10 are arranged opposite to each other at regular intervals, the electrode 7 of an arc stud welder 6 is activated, and then, while the tip end of the lead wire (CP wire) 8 and that of the round bar are made to be in contact and the welder 6 is operated, a welding shield gas is supplied from a shield nozzle 4 to shield a welded part between the lead wire 8 and the aluminum tab 10. In this state, the lead wire (CP wire) 8 is pulled from the aluminum tab 10, thus generating an arc between the tip end of the lead wire (CP wire) 8 and that of the round bar of the aluminum tab 10 and melting the facing tip ends thereof. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、スズを主体とする金属メッキされたリード線(CP線)とアルミニウム等からなる線材、特にコンデンサ用リード端子の溶接方法に関する。   The present invention relates to a metal-plated lead wire (CP wire) mainly composed of tin and a wire made of aluminum or the like, particularly to a method for welding a lead terminal for a capacitor.

従来、コンデンサ用リード端子の溶接方法は、アルミニウム等からなる線材とリード線(CP線)、即ち鉄、銅等をベースにした線材の表面に極めて高純度のスズでメッキが施されたものをアークスタッド溶接法等で接合する方法がある。
ところが、この方法では、溶接ビード表面にスズのウィスカが発生するという問題がある。
当該ウィスカは、経時的に生長するために回路基板に実装した時に接触して短絡を引き起こす心配があり、この予見が重要となっている。
このような背景から、電子情報産業技術協会(JEITA)では、電子デバイスのウィスカ試験方法の標準化を行い、JIS原案の作成および国際電子技術委員会(IEC)国際提案が計画されている。
Conventionally, the welding method for lead terminals for capacitors is to use a wire made of aluminum or the like and a lead wire (CP wire), that is, the surface of a wire based on iron, copper, etc., plated with extremely high purity tin. There is a method of joining by an arc stud welding method or the like.
However, this method has a problem that tin whiskers are generated on the surface of the weld bead.
Since the whisker grows with time, there is a concern that the whisker may come into contact with the whisker when mounted on a circuit board, and this prediction is important.
Against this background, the Japan Electronics and Information Technology Association (JEITA) is standardizing electronic device whisker test methods, and drafting JIS drafts and international proposals for the International Electrotechnical Commission (IEC) are planned.

これまで、電解コンデンサ製作の後工程のハンダ付け特性向上の目的で鉛を含有するスズメッキが施されたリード線が使用され、この場合はウィスカが発生しないことが知られている。
しかし、昨今、地球環境問題に対する関心が高まる中、特に鉛の使用削減に対する要求が高くなってきている。
このような背景から鉛を含有しないスズメッキを施したリード線(CP線)の使用が急務になっているが、上述のウィスカ発生を完全に防止できる方法は未だ開示されていない。
Up to now, lead wires plated with tin containing lead have been used for the purpose of improving soldering characteristics in the post-process of electrolytic capacitor fabrication. In this case, it is known that whiskers do not occur.
However, in recent years, as interest in global environmental issues has increased, there has been an increasing demand for reducing the use of lead.
From such a background, the use of lead wires (CP wires) plated with tin that does not contain lead is urgently needed, but a method that can completely prevent the occurrence of the above whiskers has not yet been disclosed.

そこで、当該ウィスカを抑制する方法として、ビスマス等の金属を含有したスズメッキを施したリード線を使用する方法(特許文献1)、溶接前処理としてアルカリ性の洗浄液でリード線を洗浄・乾燥後に加熱する方法(特許文献2)、溶接後処理として酸素雰囲気内で加熱する方法と溶接終了後数ミリ秒〜1秒内に珪酸塩やホウ酸塩等を無機酸塩が含まれた加熱水溶液に浸漬する方法(特許文献3)がある。
また、関連技術として、ウィスカ発生を抑制するスズ合金メッキを得る表面処理剤ベンズイミダゾール化合物およびその塩を含むハンダ用の表面処理剤(特許文献4)が開示されている。
また、無鉛スズメッキされた銅リード端子との溶接強度の向上を目的として、スズの溶融温度近くの温度で予熱(加熱されたアルゴン、窒素等の不活性ガスを吹き付ける手段等で)後にアーク溶接する方法(特許文献5)が開示されている。
Therefore, as a method for suppressing the whisker, a method using a lead wire plated with tin containing a metal such as bismuth (Patent Document 1), and heating the lead wire after washing and drying with an alkaline cleaning solution as a pretreatment for welding. Method (Patent Document 2), a method of heating in an oxygen atmosphere as post-welding treatment, and immersing silicate, borate, etc. in a heated aqueous solution containing inorganic acid salt within a few milliseconds to 1 second after the end of welding There is a method (Patent Document 3).
Further, as a related technique, a surface treatment agent for solder containing a benzimidazole compound and a salt thereof for obtaining a tin alloy plating for suppressing whisker generation (Patent Document 4) is disclosed.
Also, for the purpose of improving the welding strength with lead-free tin-plated copper lead terminals, arc welding is performed after preheating at a temperature close to the melting temperature of tin (by means of blowing an inert gas such as heated argon or nitrogen). A method (Patent Document 5) is disclosed.

以上のような方法が開示されているが、鉛が含有しないビスマス・スズ合金メッキによる方法では、当該ウィスカの発生は未だ完全に防止できていない。
また当該ウィスカが発生する溶接ビードの一部になるリード線(CP線)先端部だけでなく、合金メッキが不要な部分を含む全体に施されてコスト面で問題がある。
Although the method as described above is disclosed, the generation of the whisker has not been completely prevented by the method using bismuth-tin alloy plating that does not contain lead.
Further, there is a problem in terms of cost because it is applied not only to the tip portion of the lead wire (CP wire) that becomes a part of the weld bead generated by the whisker but also to the entire portion including the portion that does not require alloy plating.

溶接前処理としてアルカリ性の洗浄液でリード線(CP線)を洗浄・乾燥後に加熱する方法では、上述の方法と同様に当該ウィスカの発生は完全に防止できていない。
また、複雑な生産工程管理の下で長時間(約21分)加熱する必要がある等、生産性やコスト面で問題がある。
In the method of heating the lead wire (CP wire) after washing and drying with an alkaline cleaning liquid as a pretreatment for welding, the generation of the whisker cannot be completely prevented as in the above-described method.
In addition, there is a problem in productivity and cost, such as heating for a long time (about 21 minutes) under complicated production process management.

溶接後処理として酸素雰囲気内で長時間(10〜60分)加熱する方法および溶接終了後数ミリ秒〜1秒内に珪酸塩やホウ酸塩等を無機酸塩が含まれた加熱水溶液に浸漬する方法では、上述の方法と同様にリード線(CP線)とアルミニウムタブとの溶接後に上記加熱工程や浸漬工程等の後工程が更に必要となり生産性やコスト面で問題があるだけでなく、当該ウィスカの長さが約100μm〜170μm程度の抑制効果であって、防止できる状態には至っていない。   A method of heating in an oxygen atmosphere for a long time (10 to 60 minutes) as a post-welding treatment, and immersing a silicate or borate in a heated aqueous solution containing an inorganic acid salt within a few milliseconds to 1 second after the end of welding. In the method to do, there is not only a problem in productivity and cost because it requires further post-processes such as the heating step and immersion step after welding the lead wire (CP wire) and the aluminum tab in the same manner as described above. The whisker length has a suppression effect of about 100 μm to 170 μm and has not yet been prevented.

また、加熱された不活性ガスのみを吹き付けて予熱後にアーク溶接した場合では、例え溶接強度が向上しても溶接ビード表面にウィスカ発生要因のスズが存在して、ウィスカの発生を防止できる状態には至っていない。   Also, in the case of arc welding after preheating by blowing only heated inert gas, even if the welding strength is improved, tin that causes whisker is present on the surface of the weld bead so that whisker generation can be prevented. Has not reached.

当該ウィスカは、リード線(CP線)を単独で加熱溶融・凝固しても発生せず、溶接による溶融金属(アルミニウム、スズ等をから成る)の凝固過程で発生要因が殆んど形成されることが発明者の研究で判明している。
従って、上述の溶接金属の表面に施す溶接前処理や溶接後処理では、当該ウィスカの長さを100μm未満に信頼性良く抑制することはもとより完全に防止する効果を得ることは困難である。
特開2000−12386公報 特開2000−277398公報 特開2004−311950公報 特開2004−156094公報 特開2004−335859公報
This whisker does not occur even when the lead wire (CP wire) is heated and melted and solidified alone, and almost all the generation factors are formed during the solidification process of molten metal (made of aluminum, tin, etc.) by welding. This has been found by the inventors' research.
Therefore, in the pre-welding process and post-welding process performed on the surface of the above-described weld metal, it is difficult to obtain the effect of completely preventing the whisker length from being reliably suppressed to less than 100 μm.
JP 2000-12386 A JP 2000-277398 A JP 2004-31950 A JP 2004-156094 A JP 2004-335859 A

本発明は、ウィスカの発生要因が形成される溶接過程で生長遮断することによって、ウィスカの発生を防止することができるコンデンサ用リード端子の溶接方法を提供することを目的とするものである。   An object of the present invention is to provide a capacitor lead terminal welding method capable of preventing the generation of whiskers by cutting off the growth in the welding process in which the cause of whisker generation is formed.

本発明は、スズを主体とした鉛を含有しない金属メッキされたリード線(CP線)とアルミニウムタブとを接合するコンデンサ用リード端子の溶接方法であって、溶接シールドガスとして不活性ガスと活性ガスとの混合ガスを用い、リード線とアルミニウムタブとを溶接することを特徴としている。   The present invention relates to a method for welding a lead terminal for a capacitor for joining a lead-free metal-plated lead (CP wire) mainly composed of tin and an aluminum tab, and includes an inert gas and an active gas as a welding shield gas. It is characterized by welding a lead wire and an aluminum tab using a mixed gas with gas.

本発明は、前記活性ガスとして酸素ガスまたは酸素ガスと炭酸ガスとの混合ガス、不活性ガスとしてアルゴンガス、ヘリウムガスの何れか一方または両者の混合ガスを用いたことを特徴としている。   The present invention is characterized in that oxygen gas or a mixed gas of oxygen gas and carbon dioxide gas is used as the active gas, and one or both of argon gas and helium gas are used as the inert gas.

本発明は、コンデンサ用リード端子の溶接方法で、即ち、溶接シールドガスとして不活性ガスであるアルゴンガス、ヘリウムガスの何れか一方または両者の混合ガスに、活性ガスである酸素ガスを10〜25%混合したガスを用いたガスシールド溶接を行うことで、溶融したスズが溶接金属内部(アルミニウムを主成分とした)に凝集凝固して取り込まれる。
その結果、溶接金属中にスズが広範囲に分散凝固することが阻止されて、溶接ビード表面からのウィスカの発生を防止することができる。この現象の全てが明らかになってはいないが、アークプラズマ気流中のガスを電離し易くする効果がある酸素が溶融金属を高温で攪拌して、比重が大きいスズが内部に取り込まれたものと推察している。
尚、高価なアルゴンガスやヘリウムガスの消費量の削減する目的で、自ら当該ウィスカの発生を抑制する効果を有する炭酸ガスを混合しても良い。
The present invention relates to a method for welding a capacitor lead terminal, that is, an argon gas or helium gas which is an inert gas as a welding shield gas, or an oxygen gas which is an active gas in a mixed gas of 10 to 25. By performing gas shield welding using a mixed gas, molten tin is agglomerated and solidified inside the weld metal (mainly made of aluminum).
As a result, it is possible to prevent tin from being dispersed and solidified in a wide range in the weld metal, and to prevent generation of whiskers from the surface of the weld bead. Although all of this phenomenon has not been clarified, it is said that oxygen, which has the effect of easily ionizing the gas in the arc plasma stream, stirs the molten metal at a high temperature, and tin with a large specific gravity is taken inside. I guess.
For the purpose of reducing the consumption of expensive argon gas or helium gas, carbon dioxide gas having an effect of suppressing the generation of the whisker itself may be mixed.

溶接ビード形状を改善するシールドガス、即ち、電位傾度の高い不活性ガス(ヘリウムガス)を活性ガスの効果を損なわない範囲の割合で添加することによって、溶接ビード形状を平滑(ぬれ性向上)にする効果とアーク発生時の溶融金属を高温化にする効果によって、更に当該ウィスカの発生防止の信頼性向上を図ることができる。   By adding a shielding gas that improves the weld bead shape, that is, an inert gas (helium gas) having a high potential gradient in a range that does not impair the effect of the active gas, the weld bead shape is made smooth (improves wettability). Due to the effect of increasing the temperature of the molten metal at the time of arc generation, it is possible to further improve the reliability of preventing the occurrence of the whisker.

本発明によれば、従来技術のようなリード線(CP線)とアルミニウムタブとの溶接における前処理や後処理等の複雑な生産管理工程を経ることなく、溶接シールドガスとして不活性ガスに活性ガスを添加する手段によって、溶接過程が完了すると同時に当該ウィスカの発生源から絶って防止することが可能になる。   According to the present invention, it is active as an inert gas as a welding shield gas without going through complicated production management processes such as pre-treatment and post-treatment in welding of a lead wire (CP wire) and an aluminum tab as in the prior art. By means of adding gas, it is possible to prevent the whisker from being generated at the same time as the welding process is complete.

以下、本発明を実施するための最良の形態を図面に基づいて説明する。
本発明である電解コンデンサや電気2重層コンデンサ用リード端子の溶接方法の一例として、図1および図2に示すアークスタッド溶接法のシステム構成図で説明する。
以下、電解コンデンサ用リード端子にて説明する。
アルゴンガス1を充填したガスボンベ及び酸素ガス2を充填したガスボンベから各ガスを供給混合する混合器3を設け、該混合器3で所定の割合で混合された溶接シールドガス11を供給する複数のシールドノズル4を設ける。
なお、5はガスボンベに充填したヘリウムガスである。
アークスタッド溶接装置6の一方の電極7でリード線(CP線)8を把持し、他方の電極9でアルミニウムタブ10を把持して、リード線(CP線)8先端とアルミニウムタブ10先端との接触点、即ち、溶接部には前記シールドノズル4から溶接シールドガス11が供給されるように配置する。
Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
As an example of the welding method of the electrolytic capacitor and the electric double layer capacitor lead terminal according to the present invention, a system configuration diagram of the arc stud welding method shown in FIGS. 1 and 2 will be described.
Hereinafter, explanation will be made with the lead terminals for electrolytic capacitors.
A mixer 3 for supplying and mixing each gas from a gas cylinder filled with argon gas 1 and a gas cylinder filled with oxygen gas 2 is provided, and a plurality of shields for supplying welding shield gas 11 mixed at a predetermined ratio by the mixer 3 A nozzle 4 is provided.
In addition, 5 is helium gas with which the gas cylinder was filled.
The lead wire (CP wire) 8 is gripped by one electrode 7 of the arc stud welding device 6, and the aluminum tab 10 is gripped by the other electrode 9, and the tip of the lead wire (CP wire) 8 and the tip of the aluminum tab 10 are It arrange | positions so that the welding shield gas 11 may be supplied from the said shield nozzle 4 to a contact point, ie, a welding part.

リード端子はリード線(CP線)8とアルミニウムタブ10とからなり、アルミニウムタブ10は、0.5〜2mm程度の丸棒状のアルミニウム線を成形加工して偏平部と丸棒部が形成され、この丸棒部とリード線(CP線)8が溶接されてリード端子が構成される。
なお、アルミニウム線の平坦部は、ここに示さない電極箔に接続される。
リード線(CP線)8は、丸棒状の線材が用いられ、この線材には、例えば、0.3〜1.2mm程度の直径の軟鋼線の表面に銅皮膜を形成したものを用いる。
この線材には、軟鋼線の他、純銅線または銅合金線、その他の金属線を用いても良い。このリード線(CP線)の表面には、スズやスズ−ビスマス等のスズを主体とする金属メッキが施されている。
The lead terminal is composed of a lead wire (CP wire) 8 and an aluminum tab 10, and the aluminum tab 10 is formed by processing a round bar-shaped aluminum wire of about 0.5 to 2 mm to form a flat part and a round bar part. The round bar and the lead wire (CP wire) 8 are welded to form a lead terminal.
The flat portion of the aluminum wire is connected to an electrode foil not shown here.
The lead wire (CP wire) 8 is a round rod-shaped wire, and for this wire, for example, a wire formed by forming a copper film on the surface of a mild steel wire having a diameter of about 0.3 to 1.2 mm is used.
In addition to mild steel wire, pure copper wire, copper alloy wire, or other metal wires may be used for this wire. The surface of the lead wire (CP wire) is subjected to metal plating mainly composed of tin such as tin or tin-bismuth.

次に、本発明の電解コンデンサ用リード端子の溶接方法を説明する。
リード線(CP線)8の先端と、アルミニウムタブ10の丸棒部の先端とを一定間隔で対向配置し、アークスタッド溶接装置6の電極7を稼動させてリード線(CP線)8の先端と丸棒部の先端を接触させると共に前記溶接装置6を作動させてシールドノズル4より溶接シールドガスを供給してリード線8とアルミニウムタブ10との溶接部をシールドする。
この状態で、リード線(CP線)8をアルミニウムタブ10より引き離すことで、リード線(CP線)8の先端とアルミニウムタブ10の丸棒部の先端との間にアークが発生、対向するリード線(CP線)8の先端とアルミニウムタブ10の丸棒部の先端が溶融する。
この状態で、リード線(CP線)8をアルミニウムタブ10の丸棒部の先端側に移動させて当接すると、金属間で溶融・凝固してリード線(CP線)8とアルミニウムタブ10の丸棒部とが溶着される。
Next, the welding method of the lead terminal for electrolytic capacitors of this invention is demonstrated.
The tip of the lead wire (CP wire) 8 and the tip of the round bar portion of the aluminum tab 10 are arranged to face each other at a constant interval, and the electrode 7 of the arc stud welding device 6 is operated to lead the tip of the lead wire (CP wire) 8. And the welding device 6 is operated to supply a welding shield gas from the shield nozzle 4 to shield the welded portion between the lead wire 8 and the aluminum tab 10.
In this state, by separating the lead wire (CP wire) 8 from the aluminum tab 10, an arc is generated between the tip of the lead wire (CP wire) 8 and the tip of the round bar portion of the aluminum tab 10, and the opposing leads The tip of the wire (CP wire) 8 and the tip of the round bar portion of the aluminum tab 10 are melted.
In this state, when the lead wire (CP wire) 8 is moved and brought into contact with the tip of the round bar portion of the aluminum tab 10, the lead wire (CP wire) 8 and the aluminum tab 10 are melted and solidified between the metals. The round bar is welded.

従来、アークスタッド溶接によって、シールドガスとして100%アルゴンガスを使用して鉛を使用しない純スズメッキされたリード線(CP線)とアルミニウム線を接合した場合、図3に示すように溶接ビードからウィスカ12が時間経過と共に発生・生長する。 当該ウィスカ12は、図4aの溶接金属内部領域及び図4bの溶接金属表層部領域の電子顕微鏡(左)およびX線分光分析写真(右)に示すようにリード線(CP線)の表面にメッキされたスズ(Sn)が溶接金属中(Al)に分散凝固した部分から発生することが発明者による研究で明らかになっている。
従って、前述のような溶接ビード表面処理による公知方法では当該ウィスカ12の発生を防止することは不可能である。
Conventionally, when arc lead welding is used to join a lead wire (CP wire) plated with pure tin that does not use lead using 100% argon gas as a shielding gas and an aluminum wire, as shown in FIG. 12 occurs and grows over time. The whisker 12 is plated on the surface of the lead wire (CP wire) as shown in an electron microscope (left) and an X-ray spectroscopic analysis photograph (right) of the weld metal inner region of FIG. 4a and the weld metal surface layer region of FIG. 4b. It has been clarified in the study by the inventors that the generated tin (Sn) is generated from the portion in which the weld metal is dispersed and solidified in (Al).
Therefore, it is impossible to prevent the whisker 12 from being generated by the known method using the weld bead surface treatment as described above.

この発生原因については、溶接によるアルミニウム(Al)からの外部応力により歪みを受けた島状のスズ(Sn)が再結晶(再結晶温度0〜25℃)して歪みのない大きな結晶であるウィスカに変わる現象である等の仮説が有望であるが明らかではない。   As for the cause of this occurrence, whisker is a large crystal without distortion due to recrystallization (recrystallization temperature 0 to 25 ° C.) of island-shaped tin (Sn) which has been strained by external stress from aluminum (Al) due to welding. The hypothesis that it is a phenomenon that changes to is promising but not clear.

そこで、この現象を解決する溶接方法の一例として、図1に示すように不活性ガスであるアルゴンガス1と活性ガスである酸素ガス2とを混合器3でそれぞれ75〜90%、10〜25%の割合で混合、複数のシールドノズル4からシールドガス11として溶接部に供給してアークスタッド溶接装置6でリード線(CP線)8とアルミニウム線10を図2に示すように溶接する。   Therefore, as an example of a welding method for solving this phenomenon, as shown in FIG. 1, argon gas 1 which is an inert gas and oxygen gas 2 which is an active gas are mixed in a mixer 3 by 75 to 90% and 10 to 25, respectively. The lead wire (CP wire) 8 and the aluminum wire 10 are welded by the arc stud welding device 6 as shown in FIG.

その結果、図5aの溶接金属内部領域及び図5bの溶接金属表層部領域の電子顕微鏡(左)およびX線分光分析写真(右)に示すようにリード線(CP線)の表面にメッキされたスズ(Sn)が溶接金属内部に凝集凝固して取り込まれて、溶接金属表層部はアルミニウム(Al)中にスズ(Sn)が分散凝固されなくなる。
この反応をアーク溶接による溶融凝固の過程中で行う方法によって、ウィスカの発生を防止することが可能となる。
As a result, the surface of the lead wire (CP line) was plated as shown in an electron microscope (left) and an X-ray spectroscopic analysis photograph (right) of the weld metal inner region of FIG. 5a and the weld metal surface layer region of FIG. 5b. Tin (Sn) is agglomerated and solidified inside the weld metal, and the surface of the weld metal does not disperse and solidify tin (Sn) in aluminum (Al).
By performing this reaction in the process of melt solidification by arc welding, it becomes possible to prevent the generation of whiskers.

更に、上述の混合ガスに電位傾度の大きいヘリウムガス5(アークプラズマエネルギーが大きい)を酸素ガス2の効果が阻害されない範囲で添加、溶接ビードを平滑することで凹凸部にスズ(Sn)が残存しないようにして当該ウィスカの発生防止の信頼性向上を図ることができる。   Further, helium gas 5 having a high potential gradient (high arc plasma energy) is added to the above-described mixed gas within a range where the effect of the oxygen gas 2 is not hindered, and the weld bead is smoothed, so that tin (Sn) remains in the uneven portion. Thus, the reliability of preventing the occurrence of the whisker can be improved.

尚、リード線(CP線)8の金属メッキは、スズを主体とした金属メッキであれば良く、スズ−ビスマス等の他の金属材料を含有するものも含まれる。   The metal plating of the lead wire (CP wire) 8 may be metal plating mainly composed of tin, and includes those containing other metal materials such as tin-bismuth.

また、溶接法として、前記実施例のアークスタッド溶接法はもとより他のガスシールド溶接法(レーザ溶接法、マイクロTIG溶接法等)に応用した方法も含まれる。
更に、同様のガス雰囲気を形成できるチャンバー内で溶接する方法も含まれる。
In addition, the welding method includes not only the arc stud welding method of the above embodiment but also other gas shield welding methods (laser welding method, micro TIG welding method, etc.).
Furthermore, a method of welding in a chamber capable of forming a similar gas atmosphere is also included.

本発明のガスシールド方法を説明するシステム構成図である。It is a system block diagram explaining the gas shielding method of this invention. ガスシールド溶接終了時の状態を説明する図である。It is a figure explaining the state at the time of completion | finish of gas shield welding. ウィスカ発生形態を説明する図である。It is a figure explaining the whisker generation | occurrence | production form. 溶接金属内部領域のArガスシールド溶接法におけるウィスカ発生を説明する走査型電子顕微鏡(SEM)写真およびエネルギー分散型X線分光(EDS)分析写真である。It is a scanning electron microscope (SEM) photograph and an energy dispersive X-ray-spectroscopy (EDS) analysis photograph explaining whisker generation | occurrence | production in the Ar gas shield welding method of a weld metal inner area | region. 溶接金属表層部領域のArガスシールド溶接法におけるウィスカ発生を説明する走査型電子顕微鏡(SEM)写真およびエネルギー分散型X線分光(EDS)分析写真である。It is a scanning electron microscope (SEM) photograph and energy dispersive X-ray spectroscopy (EDS) analysis photograph explaining generation | occurrence | production of the whisker in the Ar gas shield welding method of a weld metal surface layer area | region. 溶接金属内部領域のArガス+O2ガスシールド溶接法におけるウィスカ発生防止を説明する走査型電子顕微鏡(SEM)写真およびエネルギー分散型X線分光(EDS)分析写真である。Is Ar gas + O 2 gas shielded welding process whisker preventing explaining a scanning electron microscope (SEM) photograph and energy dispersive X-ray spectroscopy in (EDS) analysis photograph of the weld metal interior region. 溶接金属表層部領域のArガス+O2ガスシールド溶接法におけるウィスカ発生防止を説明する走査型電子顕微鏡(SEM)写真およびエネルギー分散型X線分光(EDS)分析写真である。It is a scanning electron microscope (SEM) photograph and energy dispersive X-ray-spectroscopy (EDS) analysis photograph explaining prevention of whisker generation in the Ar gas + O 2 gas shield welding method in the weld metal surface layer region.

符号の説明Explanation of symbols

1 アルゴンガス
2 酸素ガス
3 混合器
4 シールドノズル
5 ヘリウムガス
6 アークスタッド溶接装置
7 一方の電極
8 リード線(CP線)
9 他方の電極
10 アルミニウム線
11 シールドガス
12 ウィスカ



1 Argon gas 2 Oxygen gas 3 Mixer 4 Shield nozzle 5 Helium gas 6 Arc stud welding device 7 One electrode 8 Lead wire (CP wire)
9 Other electrode 10 Aluminum wire 11 Shielding gas 12 Whisker



Claims (3)

スズを主体とした鉛を含有しない金属メッキが施されたリード線とアルミニウムタブとを接合するコンデンサ用リード端子の溶接方法であって、溶接シールドガスとして不活性ガスと活性ガスとの混合ガスを用い、前記リード線とアルミニウムタブとを接合するコンデンサ用リード端子の溶接方法。   A welding method for a lead terminal for a capacitor, which joins a lead wire containing lead-free metal plating mainly composed of tin and an aluminum tab, wherein a mixed gas of an inert gas and an active gas is used as a welding shield gas. A method for welding a lead terminal for a capacitor, wherein the lead wire and an aluminum tab are joined. 前記活性ガスとして酸素ガスまたは酸素ガスと炭酸ガスとの混合ガス、不活性ガスとしてアルゴンガス、ヘリウムガスの何れか一方または両者の混合ガスを用いることを特徴とする請求項1記載のコンデンサ用リード端子の溶接方法。   2. The lead for a capacitor according to claim 1, wherein oxygen gas or a mixed gas of oxygen gas and carbon dioxide gas is used as the active gas, and one or both of argon gas and helium gas are used as the inert gas. Terminal welding method. 前記リード線とアルミニウムタブとの溶接金属内部にスズを凝集凝固することを特徴とする請求項1又は請求項2記載のコンデンサ用リード端子の溶接方法。


3. The method for welding capacitor lead terminals according to claim 1, wherein tin is coagulated and solidified inside the weld metal of the lead wire and the aluminum tab.


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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008305880A (en) * 2007-06-06 2008-12-18 Akita Univ Welding method for lead terminal for capacitor
KR20120101039A (en) * 2009-11-02 2012-09-12 고호꾸고오교오가부시끼가이샤 Method for producing terminal for electronic component, and terminal for electronic component produced by the production method
CN103745838A (en) * 2013-12-27 2014-04-23 珠海华冠电子科技有限公司 Capacitor detection and spot welding all-in-one machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230380A (en) * 1988-06-10 1990-01-31 John G Church Gas-metal-arc welding method
JP2001079668A (en) * 1999-09-10 2001-03-27 Kobe Steel Ltd Method for welding aluminum or aluminum alloy material
JP2004311950A (en) * 2002-12-27 2004-11-04 Kohoku Kogyo Kk Tab terminal for electrolytic capacitor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230380A (en) * 1988-06-10 1990-01-31 John G Church Gas-metal-arc welding method
JP2001079668A (en) * 1999-09-10 2001-03-27 Kobe Steel Ltd Method for welding aluminum or aluminum alloy material
JP2004311950A (en) * 2002-12-27 2004-11-04 Kohoku Kogyo Kk Tab terminal for electrolytic capacitor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008305880A (en) * 2007-06-06 2008-12-18 Akita Univ Welding method for lead terminal for capacitor
KR20120101039A (en) * 2009-11-02 2012-09-12 고호꾸고오교오가부시끼가이샤 Method for producing terminal for electronic component, and terminal for electronic component produced by the production method
KR101616453B1 (en) 2009-11-02 2016-04-28 고호꾸고오교오가부시끼가이샤 Method for Producing Terminal for Electronic Component, and Terminal for Electronic Component Produced by the Production Method
CN103745838A (en) * 2013-12-27 2014-04-23 珠海华冠电子科技有限公司 Capacitor detection and spot welding all-in-one machine
CN103745838B (en) * 2013-12-27 2016-09-14 珠海华冠电子科技有限公司 Capacitance detecting spot welding all-in-one

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