JP5406608B2 - Resistance welding machine and resistance welding method - Google Patents

Resistance welding machine and resistance welding method Download PDF

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Publication number
JP5406608B2
JP5406608B2 JP2009156106A JP2009156106A JP5406608B2 JP 5406608 B2 JP5406608 B2 JP 5406608B2 JP 2009156106 A JP2009156106 A JP 2009156106A JP 2009156106 A JP2009156106 A JP 2009156106A JP 5406608 B2 JP5406608 B2 JP 5406608B2
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Japan
Prior art keywords
wire
electrode
welding
thermal cutting
resistance
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JP2009156106A
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Japanese (ja)
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JP2011011219A (en
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祐也 山本
洋二 浦野
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、線材の抵抗溶接に用いられる抵抗溶接機および抵抗溶接方法に関するものである。   The present invention relates to a resistance welder and a resistance welding method used for resistance welding of a wire.

従来から、電子部品の電極と、配線基板上に形成された電極ランドと、を金属ワイヤなどの線材で電気的に接続するワイヤボンディングが行われている。このようなワイヤボンディングは、線材を接続させる電極や電極ランドの位置によらず各種の接続パターンに容易に対応できる汎用性を備えていることから種々の電気的接続に利用されている。ワイヤボンディング方法の一種として、配線基板上の電極ランドに置かれた金属ワイヤに、一対の溶接用電極を押圧させると共に金属ワイヤを介して一対の溶接用電極間に通電させ、通電により生じる抵抗加熱によって配線基板上の電極ランドと金属ワイヤの一部とを溶接する抵抗溶接機の抵抗溶接方法が知られている（たとえば、特許文献１や特許文献２）。   Conventionally, wire bonding has been performed in which an electrode of an electronic component and an electrode land formed on a wiring board are electrically connected by a wire such as a metal wire. Such wire bonding is used for various electrical connections because it has versatility that can easily cope with various connection patterns regardless of the position of the electrode or electrode land to which the wire is connected. As one type of wire bonding method, a pair of welding electrodes are pressed against a metal wire placed on an electrode land on a wiring board and energized between the pair of welding electrodes via the metal wire, and resistance heating caused by energization is performed. There is known a resistance welding method of a resistance welding machine that welds an electrode land on a wiring board and a part of a metal wire (for example, Patent Document 1 and Patent Document 2).

ここで、抵抗溶接機の参考例として図７に示す抵抗溶接機１’を用いて動作例を説明する。抵抗溶接機１’は、一対の溶接用電極２ａ，２ｂと、該溶接用電極２ａ，２ｂに並設され線材たるワイヤ１４を供給する線材供給ユニット３’と、一対の溶接用電極２ａ，２ｂのうちの一方の溶接用電極２ｂと線材供給ユニット３’との間に設けられワイヤ１４を切断する切断刃１２と、を備えている。以下、抵抗溶接機１’を用いて隣接する基材たる配線基板５ａ，５ａの電極ランド５ｂ，５ｂ間をワイヤ１４で結線させる例を挙げる。   Here, an operation example will be described using a resistance welder 1 'shown in FIG. 7 as a reference example of the resistance welder. The resistance welder 1 ′ includes a pair of welding electrodes 2a, 2b, a wire rod supply unit 3 ′ for supplying a wire 14 that is arranged in parallel to the welding electrodes 2a, 2b, and a pair of welding electrodes 2a, 2b. And a cutting blade 12 that cuts the wire 14 provided between one of the welding electrodes 2b and the wire supply unit 3 ′. Hereinafter, an example in which the wire 14 is used to connect the electrode lands 5b and 5b of the wiring substrates 5a and 5a, which are adjacent base materials, using the resistance welding machine 1 '.

抵抗溶接機１’は、溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂを、図７（ａ）に示す白抜きの矢印の向きに沿って、一方の配線基板５ａの電極ランド５ｂ上に供給されたワイヤ１４に押圧させると共に、溶接用電極２ａ，２ｂ間に外部の電源から給電させることによりワイヤ１４に通電させる。これにより抵抗溶接機１’は、ワイヤ１４を配線基板５ａの電極ランド５ｂ上に抵抗溶接する（図７（ａ））。   The resistance welder 1 ′ supplies the tip portions 2ab and 2bb of the welding electrodes 2a and 2b onto the electrode land 5b of one wiring board 5a along the direction of the white arrow shown in FIG. The wire 14 is pressed, and the wire 14 is energized by supplying power from an external power source between the welding electrodes 2a and 2b. As a result, the resistance welding machine 1 ′ resistance-welds the wire 14 onto the electrode land 5 b of the wiring board 5 a (FIG. 7A).

次に、抵抗溶接機１’は、溶接用電極２ａ，２ｂを図７（ｂ）に示す白抜きの矢印の向きに他方の配線基板５ａの電極ランド５ｂ側へ移動させると共に、線材供給ユニット３’に内装された口ーラ９，９を駆動させて、所定長さのワイヤ１４を線材供給ユニット３’から供給する（図７（ｂ））。   Next, the resistance welding machine 1 ′ moves the welding electrodes 2a and 2b to the electrode land 5b side of the other wiring board 5a in the direction of the white arrow shown in FIG. The mouthlers 9 and 9 housed in 'are driven to supply a wire 14 of a predetermined length from the wire rod supply unit 3' (Fig. 7 (b)).

続いて、抵抗溶接機１’は、再び溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂを、図７（ｃ）に示す白抜きの矢印に沿って前記他方の配線基板５ａに設けられた電極ランド５ｂ上のワイヤ１４に押圧および通電させて、ワイヤ１４の一部を配線基板５ａの電極ランド５ｂ上に抵抗溶接する。抵抗溶接機１’は、ワイヤ１４の抵抗溶接が完了すると、切断刃１２によってワイヤ１４を切断する（図７（ｃ））。これにより、抵抗溶接機１’は、隣接する配線基板５ａ，５ａの電極ランド５ｂ，５ｂ間をワイヤ１４によって結線することができる。   Subsequently, the resistance welding machine 1 ′ again attaches the tip portions 2ab and 2bb of the welding electrodes 2a and 2b to the other wiring board 5a along the white arrow shown in FIG. 7C. The wire 14 on the land 5b is pressed and energized, and a part of the wire 14 is resistance welded onto the electrode land 5b of the wiring board 5a. When the resistance welding of the wire 14 is completed, the resistance welding machine 1 ′ cuts the wire 14 with the cutting blade 12 (FIG. 7C). Thereby, the resistance welding machine 1 ′ can connect the electrode lands 5 b and 5 b of the adjacent wiring boards 5 a and 5 a with the wire 14.

しかしながら、抵抗溶接機１’において、たとえば、銅リボン材などのようなアルミニウム線と比較して比較的硬質なワイヤ１４や線径が太いワイヤ１４を用いた場合、抵抗溶接機１’は、切断刃１２によるワイヤ１４の切断が困難な場合がある。また、このようなワイヤ１４を切断するため、抵抗溶接機１’は、強度の高い切断刃１２や、切断刃１２に強い力を付与する大型の駆動部が必要になる。しかし、強度の高い切断刃１２や大型の駆動部を溶接用電極２ａ，２ｂに並設させると、抵抗溶接機１’における溶接用電極２ａ，２ｂの周りが大きくなってしまうので、微細な溶接に適した小型化可能な抵抗溶接機１’を実現することができない。   However, in the resistance welding machine 1 ′, for example, when using a relatively hard wire 14 or a wire 14 having a larger wire diameter than an aluminum wire such as a copper ribbon material, the resistance welding machine 1 ′ Cutting the wire 14 with the blade 12 may be difficult. Moreover, in order to cut | disconnect such a wire 14, resistance welding machine 1 'requires the large sized drive part which provides the strong force to the cutting blade 12 with high intensity | strength, and the cutting blade 12. FIG. However, if a high-strength cutting blade 12 or a large driving part is arranged in parallel with the welding electrodes 2a and 2b, the area around the welding electrodes 2a and 2b in the resistance welding machine 1 ′ becomes large, so that fine welding is performed. It is not possible to realize a resistance welding machine 1 ′ that can be reduced in size and that is suitable for the above-mentioned.

また、上述のワイヤボンディングに用いられるものとは異なるが、抵抗溶接機１’において、切断刃１２によるワイヤ１４の切断に代えて、溶接用電極２ａ，２ｂとは別個に設けられた熱切断用電極を用いてワイヤ１４を切断する抵抗溶接機１’も知られている（たとえば、特許文献３を参照）。   Moreover, although it is different from what is used for the above-mentioned wire bonding, it replaces with the cutting | disconnection of the wire 14 with the cutting blade 12, and is for the thermal cutting provided separately from welding electrodes 2a and 2b in resistance welding machine 1 '. A resistance welder 1 ′ that cuts the wire 14 using an electrode is also known (see, for example, Patent Document 3).

この抵抗溶接機１’は、溶接用の固定式電極と可動式電極でワイヤ１４を挟んで抵抗溶接を行うと共に、前記固定式電極および前記可動式電極とは別体に設けられた前記熱切断用電極および前記固定式電極でワイヤ１４を挟むことにより、ワイヤ１４を熱切断している。   The resistance welding machine 1 ′ performs resistance welding with a wire 14 sandwiched between a fixed electrode and a movable electrode for welding, and the thermal cutting provided separately from the fixed electrode and the movable electrode. The wire 14 is thermally cut by sandwiching the wire 14 between the working electrode and the fixed electrode.

特開平１−２４９２７７号公報JP-A-1-249277 特開平７−３７９２２号公報Japanese Patent Laid-Open No. 7-37922 特開平４−２２４０８３号公報JP-A-4-224083

しかしながら、特許文献３に示された抵抗溶接機１’も、溶接用の前記可動式電極および前記固定式電極がワイヤ１４を挟んで離れているため、また、前記可動式電極および前記熱切断用電極の夫々を個別に動作させるための駆動部を要するので、抵抗溶接機１’における溶接用電極２ａ，２ｂの周りが大きくなり、より微細な溶接に適した小型化可能な抵抗溶接機１’とはならない。   However, the resistance welding machine 1 ′ shown in Patent Document 3 also has the movable electrode for welding and the fixed electrode separated from each other with the wire 14 interposed therebetween. Since a drive part for individually operating each of the electrodes is required, the area around the welding electrodes 2a and 2b in the resistance welding machine 1 'becomes large, and the resistance welding machine 1' that can be miniaturized suitable for finer welding is used. It will not be.

本発明は上記事由に鑑みてなされたものであり、その目的は、切断刃を用いることなく、線材を切断することができ、溶接用電極の周りが小型化可能な抵抗溶接機および抵抗溶接方法を提供することにある。   The present invention has been made in view of the above-mentioned reasons, and the object thereof is a resistance welding machine and a resistance welding method that can cut a wire without using a cutting blade and can reduce the size of the periphery of a welding electrode. Is to provide.

請求項１の発明は、線材供給ユニットから供給された線材を介して基材にそれぞれ圧接する一対の溶接用電極を備え、電源部から前記一対の溶接用電極間に給電することにより前記線材に通電させて前記線材の一部を前記基材に抵抗溶接する抵抗溶接機であって、前記線材を前記溶接用電極の少なくとも一方と挟持し前記線材に通電することにより該線材を熱切断する熱切断用電極と、前記熱切断に際し前記線材の長手方向に沿って該線材に張力を付与する張力付与手段と、を有することを特徴とする。 The invention of claim 1 comprises a pair of welding electrodes in contact with pressure to the substrate via a wire line material supplied from the supply unit, the power supply unit to the wire by the feed between the pair of welding electrodes A resistance welding machine that energizes and resistance-welds a part of the wire to the base material, wherein the wire is sandwiched between at least one of the welding electrodes and the wire is energized to thermally cut the wire. A cutting electrode; and tension applying means for applying tension to the wire along the longitudinal direction of the wire during the thermal cutting.

この発明によれば、一対の溶接用電極の少なくとも一方と熱切断用電極とで線材を挟み込んで抵抗加熱により前記線材を熱切断するので、たとえば、切断刃では切断し難いような材料の前記線材でも容易に切断することができる。また、抵抗溶接機における前記溶接用電極の周りが、切断刃を用いることなく小型化可能な構成とすることができる。   According to this invention, since the wire is sandwiched between at least one of the pair of welding electrodes and the thermal cutting electrode and the wire is thermally cut by resistance heating, for example, the wire made of a material that is difficult to cut with a cutting blade But it can be easily cut. Moreover, it can be set as the structure which can be reduced in size around the said electrode for welding in a resistance welding machine, without using a cutting blade.

さらに、この発明によれば、前記一対の溶接用電極の少なくとも一方と、前記熱切断用電極と、で挟み込んだ前記線材との接触抵抗が、張力付与手段によって前記線材に付加された張力によって安定し、前記線材の熱切断の際に前記熱切断用電極などに生ずるスパークの発生を抑制することができる。そのため、前記線材の熱切断にともなう前記溶接用電極や前記熱切断用電極の劣化を抑制することが可能となる。また、前記線材の熱切断にともなう前記溶接用電極の少なくとも一方と、前記熱切断用電極と、の間に給電する電圧を低減させることもできる。   Further, according to this invention, the contact resistance between the wire rod sandwiched between at least one of the pair of welding electrodes and the thermal cutting electrode is stabilized by the tension applied to the wire rod by the tension applying means. And generation | occurrence | production of the spark which arises in the said electrode for thermal cutting etc. in the case of the thermal cutting of the said wire can be suppressed. Therefore, it is possible to suppress deterioration of the welding electrode and the thermal cutting electrode accompanying the thermal cutting of the wire. In addition, it is possible to reduce the voltage supplied between at least one of the welding electrodes accompanying the thermal cutting of the wire and the thermal cutting electrode.

請求項２の発明は、請求項１に記載の発明において、前記線材供給ユニットは、前記一対の溶接用電極に並設される前記熱切断用電極と、前記線材を前記基材に供給するために前記線材を搬送する搬送部と、を備え、該搬送部が前記張力付与手段を兼ねていることを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, the wire supply unit supplies the thermal cutting electrode arranged in parallel with the pair of welding electrodes and the wire to the base material. And a conveying section that conveys the wire, and the conveying section also serves as the tension applying means.

この発明によれば、前記線材供給ユニットに前記線材を搬送する搬送部を備えたことにより、前記線材の搬送を精度よく制御することが可能となる。また、前記線材の熱切断に際し、前記溶接用電極および前記熱切断用電極から前記線材への通電と、前記線材に張力を付与するための前記搬送部の搬送と、を制御性よく行うことが可能となる。   According to this invention, it becomes possible to control the conveyance of the said wire with high precision by providing the conveyance part which conveys the said wire in the said wire supply unit. Further, when the wire is thermally cut, the energization from the welding electrode and the thermal cutting electrode to the wire and the conveyance of the conveyance unit for applying tension to the wire are performed with good controllability. It becomes possible.

請求項３の発明は、請求項１または請求項２に記載の発明において、前記熱切断用電極は、前記線材よりも融点および靭性が高い板状体であることを特徴とする。   According to a third aspect of the present invention, in the first or second aspect of the present invention, the thermal cutting electrode is a plate-like body having a melting point and toughness higher than those of the wire.

この発明によれば、前記熱切断用電極が、前記線材よりも融点および靭性が高い材料であることにより、前記線材の熱切断に際し前記熱切断用電極の割れ、欠けや折れを抑制することが可能となる。また、前記線材の熱切断の際に生ずる抵抗加熱の熱により、前記熱切断用電極が溶融することを防止することが可能となる。さらに、前記熱切断用電極が厚みの薄い板状体であることにより、前記熱切断用電極が厚みの厚いものと比較して前記線材の熱切断にともなう前記一対の溶接用電極の少なくとも一方と、前記熱切断用電極と、の間の電圧を低減させることが可能となる。   According to this invention, when the electrode for thermal cutting is a material having a melting point and toughness higher than those of the wire, it is possible to suppress cracking, chipping and breakage of the electrode for thermal cutting during the thermal cutting of the wire. It becomes possible. In addition, it is possible to prevent the thermal cutting electrode from being melted by the heat of resistance heating generated during the thermal cutting of the wire. Further, since the thermal cutting electrode is a thin plate-like body, the thermal cutting electrode is at least one of the pair of welding electrodes accompanying thermal cutting of the wire as compared with a thicker one. It is possible to reduce the voltage between the thermal cutting electrode.

請求項４の発明は、請求項１ないし請求項３のいずれか１項に記載の発明において、前記溶接用電極は、リボン形状の前記線材を前記熱切断用電極と挟持するエッジ部を備えてなることを特徴とする。   According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the welding electrode includes an edge portion that sandwiches the ribbon-shaped wire rod with the thermal cutting electrode. It is characterized by becoming.

この発明によれば、前記溶接用電極および前記熱切断用電極が、リボン形状の前記線材への電流経路を線状の接触とすることにより、電流経路が面状の接触となるものと比較して、電流密度を大きくさせ局部的に前記線材を加熱溶融することが可能となる。そのため、前記線材の熱切断に際する電圧を低減することが可能となる。   According to this invention, the electrode for welding and the electrode for thermal cutting have a current path to the ribbon-shaped wire as a linear contact, so that the current path becomes a planar contact. Thus, the current density can be increased and the wire can be locally heated and melted. Therefore, it is possible to reduce the voltage at the time of thermal cutting of the wire.

請求項５の発明は、請求項１ないし請求項３のいずれか１項に記載の発明において、前記溶接用電極は、前記線材を前記熱切断用電極と挟持する突出部を備えており、前記突出部はリボン形状の前記線材の線幅に沿って前記線材に線状に接触可能な形状であることを特徴とする。   According to a fifth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the welding electrode includes a protrusion that sandwiches the wire rod with the thermal cutting electrode, The projecting portion has a shape that can be brought into contact with the wire in a line shape along the line width of the ribbon-shaped wire.

この発明によれば、前記溶接用電極の突出部により、リボン形状の前記線材への電流経路を線状の接触とすることができ、電流経路が面接触となるものと比較して、電流密度を大きくさせ局部的に前記線材を加熱溶融することが可能となる。そのため、前記線材の熱切断に際する電圧をより低減することが可能となる。   According to the present invention, the current path to the ribbon-shaped wire can be a linear contact by the protruding portion of the welding electrode, and the current density is compared with that in which the current path is a surface contact. It is possible to heat and melt the wire locally. Therefore, it is possible to further reduce the voltage at the time of thermal cutting of the wire.

請求項６の発明は、請求項４または請求項５に記載の発明において、前記熱切断用電極が、前記線材を前記溶接用電極と挟持する突出部を備えており、前記突出部はリボン形状の前記線材の線幅に沿って前記線材に線状に接触可能な形状であることを特徴とする。   The invention according to claim 6 is the invention according to claim 4 or 5, wherein the thermal cutting electrode includes a protruding portion for sandwiching the wire rod with the welding electrode, and the protruding portion has a ribbon shape. It is a shape which can contact the said wire in a line shape along the line width of the said wire.

この発明によれば、前記熱切断用電極の突出部により、リボン形状の前記線材への電流経路を線状の接触とすることができ、電流経路が面接触となるものと比較して、電流密度を大きくさせ局部的に前記線材を加熱溶融することが可能となる。そのため、前記線材の熱切断に際する電圧をより低減することが可能となる。   According to this invention, the current path to the ribbon-shaped wire can be a linear contact by the protruding portion of the thermal cutting electrode. The density can be increased and the wire can be locally heated and melted. Therefore, it is possible to further reduce the voltage at the time of thermal cutting of the wire.

請求項７の発明は、請求項５または請求項６に記載の発明において、前記突出部が、リボン形状の前記線材の線幅方向と垂直な軸に対して回転可能な回転軸に備えられてなることを特徴とする。   The invention according to claim 7 is the invention according to claim 5 or 6, wherein the projecting portion is provided on a rotating shaft that is rotatable with respect to an axis perpendicular to a line width direction of the ribbon-shaped wire. It is characterized by becoming.

この発明によれば、前記突出部がリボン形状の前記線材の線幅方向と垂直な軸に対して回転可能な回転軸に備えられてなることにより、前記線材にかかる張力に応じて前記突出部が回転するから前記線材の姿勢が安定化する。そのため、前記突出部上に安定して前記線材が接触することができ、熱切断がより容易になる。   According to this invention, the protrusion is provided on the rotating shaft that is rotatable with respect to an axis perpendicular to the line width direction of the ribbon-shaped wire, so that the protrusion corresponds to the tension applied to the wire. Since the wire rotates, the posture of the wire is stabilized. Therefore, the said wire can contact stably on the said protrusion part, and thermal cutting becomes easier.

請求項８の発明は、抵抗溶接方法において、一対の溶接用電極と、基材との間で線材を挟持し前記一対の溶接用電極間に前記線材を介して通電することによって前記線材の一部を前記基材に抵抗溶接する抵抗溶接工程と、前記抵抗溶接工程後に、前記一対の溶接用電極を前記基材から離して前記線材を該溶接用電極の一方と熱切断用電極とで挟持すると共に、前記線材の長手方向に沿って該線材に張力を付与しながら前記熱切断用電極と前記溶接用電極との間に前記線材を介して通電して前記線材を熱切断する熱切断工程と、を有することを特徴とする。 The invention of claim 8, in the resistance welding process, the wire by passing through the welding electrodes of a pair, the wire between the pair of welding electrodes a wire is sandwiched between the substrate A resistance welding process in which a part of the welding electrode is resistance-welded to the base material, and after the resistance welding process, the pair of welding electrodes are separated from the base material so that the wire is one of the welding electrodes and a thermal cutting electrode And heat-cutting the wire by energizing the wire between the thermal cutting electrode and the welding electrode while applying tension to the wire along the longitudinal direction of the wire. And a cutting step.

この発明によれば、熱切断工程において、前記一対の溶接用電極および前記熱切断用電極と、前記線材と、の接触抵抗が安定するため、前記溶接用電極や前記熱切断用電極などに生ずるスパークの発生が抑制され、前記熱切断用電極や前記溶接用電極の劣化を防止することができる。また、前記線材の熱切断に際し電圧の低減を図ることが可能となる。   According to the present invention, in the thermal cutting step, contact resistance between the pair of welding electrodes and the thermal cutting electrode and the wire is stabilized, and thus occurs in the welding electrode and the thermal cutting electrode. Generation | occurrence | production of a spark is suppressed and deterioration of the said electrode for thermal cutting and the said electrode for welding can be prevented. Further, it is possible to reduce the voltage when the wire is thermally cut.

請求項１の発明は、一対の溶接用電極の少なくとも一方と熱切断用電極とで線材を挟み込んで抵抗加熱により前記線材を熱切断するので、切断刃を用いることなく前記線材を切断することができ溶接用電極の周りが小型化可能な抵抗溶接機を提供できるという効果を奏する。さらに、張力付与手段によって前記線材に付加された張力によって前記線材との接触抵抗が安定するため、スパークの発生を抑制し、前記溶接用電極や前記熱切断用電極の劣化を抑制することが可能となる。また、前記線材の熱切断に際し前記一対の溶接用電極の少なくとも一方と、前記熱切断用電極と、の間に給電する電圧を低減させることもできる抵抗溶接機を提供できるという顕著な効果を奏する。   According to the first aspect of the present invention, the wire is sandwiched between at least one of the pair of welding electrodes and the thermal cutting electrode, and the wire is thermally cut by resistance heating. Therefore, the wire can be cut without using a cutting blade. Thus, there is an effect that it is possible to provide a resistance welding machine that can be downsized around the welding electrode. Furthermore, since the contact resistance with the wire is stabilized by the tension applied to the wire by the tension applying means, it is possible to suppress the occurrence of sparks and the deterioration of the welding electrode and the thermal cutting electrode. It becomes. In addition, there is a remarkable effect that it is possible to provide a resistance welding machine that can reduce the voltage supplied between at least one of the pair of welding electrodes and the thermal cutting electrode during the thermal cutting of the wire. .

請求項８の発明は、抵抗溶接方法において、抵抗溶接工程後に、前記一対の溶接用電極を前記基材から離して前記線材を該溶接用電極の一方と熱切断用電極とで挟持すると共に、前記線材の長手方向に沿って該線材に張力を付与しながら前記熱切断用電極と前記溶接用電極との間に前記線材を介して通電して前記線材を熱切断する熱切断工程を有することにより、前記一対の溶接用電極の一方および前記熱切断用電極と、前記線材と、の接触抵抗が安定するため、スパークの発生が抑制され、前記熱切断用電極や前記溶接用電極の劣化を防止することができる。また、前記線材の熱切断に際し電圧の低減を図ることが可能な抵抗溶接方法を提供することができるという顕著な効果を奏する。   The invention of claim 8 is the resistance welding method, wherein after the resistance welding step, the pair of welding electrodes are separated from the base material, and the wire is sandwiched between one of the welding electrodes and the thermal cutting electrode, Having a thermal cutting step of thermally cutting the wire by energizing the wire between the thermal cutting electrode and the welding electrode while applying tension to the wire along the longitudinal direction of the wire. This stabilizes the contact resistance between one of the pair of welding electrodes, the thermal cutting electrode, and the wire, thereby suppressing the occurrence of sparks and reducing the degradation of the thermal cutting electrode and the welding electrode. Can be prevented. In addition, there is a remarkable effect that it is possible to provide a resistance welding method capable of reducing a voltage when the wire is thermally cut.

実施形態１の抵抗溶接機における模式的要部側面図である。It is a typical principal part side view in the resistance welding machine of Embodiment 1. FIG. 同上の抵抗溶接機における要部の動作を説明する動作説明図である。It is operation | movement explanatory drawing explaining operation | movement of the principal part in a resistance welding machine same as the above. 同上の抵抗溶接機の要部拡大側面図である。It is a principal part expanded side view of a resistance welding machine same as the above. 同上の抵抗溶接機の別の要部拡大側面図である。It is another principal part enlarged side view of a resistance welding machine same as the above. 同上の抵抗溶接機の他の要部拡大斜視図である。It is another principal part expansion perspective view of the resistance welding machine same as the above. 実施形態２の抵抗溶接機の要部拡大斜視図である。It is a principal part expansion perspective view of the resistance welding machine of Embodiment 2. FIG. 参考のための抵抗溶接機における要部の動作説明図である。It is operation | movement explanatory drawing of the principal part in the resistance welding machine for reference.

（実施形態１）
本実施形態の抵抗溶接機を図１で説明し、図１で示す抵抗溶接機１を用いてリボン形状の線材たる銅リボン線４を基材たる配線基板５ａの電極ランド５ｂ上に圧接する抵抗溶接方法を図２に基づいて説明する。 (Embodiment 1)
The resistance welding machine of the present embodiment will be described with reference to FIG. 1, and the resistance that presses the copper ribbon wire 4, which is a ribbon-shaped wire, onto the electrode land 5 b of the wiring substrate 5 a as a base material using the resistance welding machine 1 shown in FIG. A welding method will be described with reference to FIG.

本実施形態の抵抗溶接機１は、線材供給ユニット３から供給されたリボン形状の線材たる銅リボン線４を前記基材たる配線基板５ａの電極ランド５ｂ上に圧接する一対の溶接用電極２ａ，２ｂを備えている。抵抗溶接機１は、一対の溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂで銅リボン線４を配線基板５ａの電極ランド５ｂ上に押圧することができる。抵抗溶接機１は、銅リボン線４を配線基板５ａの電極ランド５ｂ上に押圧した状態で、電源部７（図２（ｂ），（ｄ）を参照）から一対の溶接用電極２ａ，２ｂ間に給電することにより銅リボン線４に通電し、抵抗加熱による熱を生じさせ銅リボン線４の一部を配線基板５ａの電極ランド５ｂに抵抗溶接する。   The resistance welding machine 1 of this embodiment includes a pair of welding electrodes 2a that press-contact a copper ribbon wire 4 that is a ribbon-shaped wire supplied from a wire supply unit 3 onto an electrode land 5b of a wiring substrate 5a that is the base material. 2b. The resistance welder 1 can press the copper ribbon wire 4 onto the electrode land 5b of the wiring board 5a with the tip portions 2ab and 2bb of the pair of welding electrodes 2a and 2b. The resistance welder 1 presses the copper ribbon wire 4 onto the electrode land 5b of the wiring board 5a, and the pair of welding electrodes 2a and 2b from the power source unit 7 (see FIGS. 2B and 2D). The copper ribbon wire 4 is energized by supplying power in between, heat is generated by resistance heating, and a part of the copper ribbon wire 4 is resistance-welded to the electrode land 5b of the wiring board 5a.

本実施形態の抵抗溶接機１では、銅リボン線４を一対の溶接用電極２ａ，２ｂの少なくとも一方（図１では、溶接用電極２ｂ）と挟持し、銅リボン線４に通電し抵抗加熱によるジュール熱を生じさせ銅リボン線４を熱切断する熱切断用電極２ｃと、前記熱切断に際し銅リボン線４の長手方向に沿って銅リボン線４に張力を付与する張力付与手段６と、を有している。   In the resistance welding machine 1 of the present embodiment, the copper ribbon wire 4 is sandwiched between at least one of the pair of welding electrodes 2a and 2b (the welding electrode 2b in FIG. 1), and the copper ribbon wire 4 is energized by resistance heating. A thermal cutting electrode 2c that generates Joule heat and thermally cuts the copper ribbon wire 4, and tension applying means 6 that applies tension to the copper ribbon wire 4 along the longitudinal direction of the copper ribbon wire 4 during the thermal cutting. Have.

また、抵抗溶接機１は、線材たる銅リボン線４を複数個の配線基板５ａの電極ランド５ｂ上などに連続的に抵抗溶接させるため、一対の溶接用電極２ａ，２ｂと、該溶接用電極２ａ，２ｂと並設される熱切断用電極２ｃと、を装着する電極ホルダ（図示せず）を備え、該電極ホルダを配線基板５ａ，５ａが配置される基台１０上の任意の位置に移動可能なアーム（図示せず）と、該アームの移動および一対の溶接用電極２ａ，２ｂおよび熱切断用電極２ｃそれぞれへの電源部７からの給電を制御するマイクロコンピュータなどからなる制御部（図示せず）と、を有している。   Further, the resistance welding machine 1 continuously resistance welds the copper ribbon wire 4 as a wire rod onto the electrode lands 5b of the plurality of wiring boards 5a, so that a pair of welding electrodes 2a and 2b and the welding electrode 2a, 2b and an electrode holder (not shown) for mounting a thermal cutting electrode 2c arranged in parallel, and the electrode holder is placed at an arbitrary position on the base 10 on which the wiring boards 5a, 5a are arranged. A control unit (comprising a movable arm (not shown) and a microcomputer for controlling the movement of the arm and power supply from the power supply unit 7 to each of the pair of welding electrodes 2a and 2b and the thermal cutting electrode 2c) (Not shown).

また、前記電極ホルダには、前記一方の溶接用電極２ｂと熱切断用電極２ｃとの相対距離を可変とし、前記一方の溶接用電極２ｂと熱切断用電極２ｃとで銅リボンを挟持するモータなどからなる駆動部（図示せず）を備えている。前記駆動部は、前記アームなどと同様に、抵抗溶接機１に備えられた前記制御部により制御することができる。   Further, the electrode holder has a variable relative distance between the one welding electrode 2b and the thermal cutting electrode 2c, and a motor for holding a copper ribbon between the one welding electrode 2b and the thermal cutting electrode 2c. The drive part (not shown) which consists of etc. is provided. The drive unit can be controlled by the control unit provided in the resistance welding machine 1 in the same manner as the arm and the like.

なお、前記電極ホルダを備えた前記アームを基台１０上の任意の位置に移動させる代わりに、基台１０を縦横自由に移動可能なＸＹステージ上に固定して、ＸＹステージに対して垂直方向に移動する前記電極ホルダによって順次線材たる銅リボン線４を前記基材たる配線基板５ａの電極ランド５ｂに抵抗溶接してもよい。   Instead of moving the arm provided with the electrode holder to an arbitrary position on the base 10, the base 10 is fixed on an XY stage that can move freely vertically and horizontally, and is perpendicular to the XY stage. The copper ribbon wire 4 that is a wire material may be sequentially welded to the electrode land 5b of the wiring substrate 5a that is the base material by the electrode holder that moves to the base material.

以下、本実施形態の抵抗溶接機１における各構成について詳述する。   Hereinafter, each structure in the resistance welding machine 1 of this embodiment is explained in full detail.

本実施形態の一対の溶接用電極２ａ，２ｂは、溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂで線材供給ユニット３から供給された銅リボン線４の一部を前記基材たる配線基板５ａの電極ランド５ｂに密着させ、熱および圧力を加える圧接を行うものであって、一対の溶接用電極２ａ，２ｂ間に給電することにより銅リボン線４の一部に通電させ抵抗溶接させるものである。そのため、一対の溶接用電極２ａ，２ｂは、たとえば、銅リボン線４を押圧して通電しやすいように略直方体形状や銅リボン線４と接する先端部２ａｂ，２ｂｂに電流が集中し易いように前記電極ホルダに接続される基端部よりも銅リボン線４と接する先端部２ａｂ，２ｂｂの方が先細りとなる形状などに形成することができる。一対の溶接用電極２ａ，２ｂに用いられる材料としては、抵抗溶接時の抵抗加熱により生ずる熱による溶接用電極２ａ，２ｂの劣化や給電時に溶接用電極２ａ，２ｂなど生ずるスパークにより溶接用電極２ａ，２ｂの損傷が少ないものが好ましい。一対の溶接用電極２ａ，２ｂの具体的材料としては、たとえば、モリブデン（Ｍｏ）、タングステン（Ｗ）などの金属や酸化セシウム（ＣｅＯ２）を分散させたモリブデン合金、銀タングステン合金などの合金が挙げられる。 The pair of welding electrodes 2a, 2b of the present embodiment includes a wiring board 5a, which is a base material for a part of the copper ribbon wire 4 supplied from the wire supply unit 3 at the tip portions 2ab, 2bb of the welding electrodes 2a, 2b. The electrode land 5b is brought into close contact with each other and is subjected to pressure welding to apply heat and pressure, and a part of the copper ribbon wire 4 is energized and resistance-welded by supplying power between the pair of welding electrodes 2a and 2b. is there. For this reason, the pair of welding electrodes 2a and 2b has a substantially rectangular parallelepiped shape and the tip portions 2ab and 2bb in contact with the copper ribbon wire 4 so that the current is easily concentrated, for example, so that the copper ribbon wire 4 is easily pressed and energized. The tip end portions 2ab and 2bb in contact with the copper ribbon wire 4 can be formed in a tapered shape or the like rather than the base end portion connected to the electrode holder. As a material used for the pair of welding electrodes 2a and 2b, the welding electrode 2a is caused by the deterioration of the welding electrodes 2a and 2b due to heat generated by resistance heating at the time of resistance welding and the spark generated by the welding electrodes 2a and 2b during power feeding. , 2b with less damage is preferred. Specific materials for the pair of welding electrodes 2a and 2b include, for example, metals such as molybdenum (Mo) and tungsten (W), alloys such as a molybdenum alloy in which cesium oxide (CeO 2 ) is dispersed, and a silver tungsten alloy. Can be mentioned.

一対の溶接用電極２ａ，２ｂは、直流電源からなる電源部７からの給電を受けて一対の溶接用電極２ａ，２ｂ間で電位差を有しており、一対の溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂが配線基板５ａの電極ランド５ｂと銅リボン線４を挟持することにより、銅リボン線４に通電することができる。また、本実施形態の抵抗溶接機１における一方の溶接用電極２ｂには、リボン形状の線材たる銅リボン線４を熱切断用電極２ｃと挟持するエッジ部８ａを設けている。溶接用電極２ｂのエッジ部８ａは、図３（ａ）に示すようにリボン形状の線材たる銅リボン線４と線幅方向に沿って線状の接触をさせると、銅リボン線４の線状に接触した部位に電流が集中する。そのため、溶接用電極２ｂがリボン形状の線材たる銅リボン線４と図３（ｂ）に示すように面接触する溶接用電極２ｂと比較して、効率的な抵抗加熱によるリボン形状の線材たる銅リボン線４の熱切断が可能になる。いいかえれば、抵抗溶接機１は、溶接用電極２ｂのエッジ部８ａによって電源部７から給電される電流の経路を小さくすることにより、銅リボン線４に流れる電流密度を大きくさせ、銅リボン線４における局部な抵抗加熱により銅リボン線４の熱切断を行う。そのため、抵抗溶接機１は、リボン形状の線材たる銅リボン線４の熱切断に際し、溶接用電極２ｂと熱切断用電極２ｃに給電する電圧を低減することができる。   The pair of welding electrodes 2a and 2b receive a power supply from the power supply unit 7 formed of a DC power source and have a potential difference between the pair of welding electrodes 2a and 2b, and the tips of the pair of welding electrodes 2a and 2b The portions 2ab and 2bb sandwich the electrode land 5b of the wiring board 5a and the copper ribbon wire 4, whereby the copper ribbon wire 4 can be energized. Moreover, the edge part 8a which clamps the copper ribbon wire 4 which is a ribbon-shaped wire material with the electrode 2c for thermal cutting is provided in one welding electrode 2b in the resistance welding machine 1 of this embodiment. When the edge portion 8a of the welding electrode 2b is brought into linear contact with the copper ribbon wire 4 which is a ribbon-shaped wire as shown in FIG. The current concentrates on the part that touches. Therefore, compared to the copper ribbon wire 4 in which the welding electrode 2b is a ribbon-shaped wire and the welding electrode 2b in surface contact as shown in FIG. 3 (b), the copper is a ribbon-shaped wire by efficient resistance heating. The ribbon wire 4 can be thermally cut. In other words, the resistance welding machine 1 increases the current density flowing through the copper ribbon wire 4 by reducing the path of the current supplied from the power supply unit 7 by the edge portion 8a of the welding electrode 2b. The copper ribbon wire 4 is thermally cut by local resistance heating. Therefore, the resistance welding machine 1 can reduce the voltage supplied to the welding electrode 2b and the thermal cutting electrode 2c when the copper ribbon wire 4 which is a ribbon-shaped wire is thermally cut.

抵抗溶接機１は、溶接用電極２ｂにエッジ部８ａを設ける代わりに、図４や図５に示す溶接用電極２ａ，２ｂや熱切断用電極２ｃのごとく、突出部８ｂ，８ｃを設けても良い。より具体的には、溶接用電極２ｂは、図４（ａ）に示すようにリボン形状の線材たる銅リボン線４を板状体の熱切断用電極２ｃと挟持する突出部８ｂを備えている。また、溶接用電極２ｂの突出部８ｂは、リボン形状の線材たる銅リボン線４の線幅に沿って銅リボン線４に線状に接触可能な形状としている。   Instead of providing the edge portion 8a on the welding electrode 2b, the resistance welding machine 1 may provide the protruding portions 8b and 8c as in the welding electrodes 2a and 2b and the thermal cutting electrode 2c shown in FIGS. good. More specifically, as shown in FIG. 4A, the welding electrode 2b includes a protruding portion 8b that sandwiches the copper ribbon wire 4 as a ribbon-shaped wire rod with the plate-shaped thermal cutting electrode 2c. . Further, the protruding portion 8b of the welding electrode 2b has a shape capable of linearly contacting the copper ribbon wire 4 along the line width of the copper ribbon wire 4 which is a ribbon-shaped wire.

同様に、熱切断用電極２ｃは、図４（ｂ）に示すようにリボン形状の線材たる銅リボン線４を溶接用電極２ｂのエッジ部８ａと挟持する突出部８ｃを備えている。ここで、熱切断用電極２ｃの突出部８ｃは、リボン形状の線材たる銅リボン線４の線幅に沿って銅リボン線４に線状に接触可能な形状としている。なお、突出部８ｂ，８ｃの線形状とは、リボン形状の線材たる銅リボン線４に電流が集中できる限り必ずしも連続した一直線とする必要もなく、波線状や破線形状でもよい。   Similarly, as shown in FIG. 4B, the thermal cutting electrode 2c includes a protruding portion 8c that sandwiches the copper ribbon wire 4 as a ribbon-shaped wire rod with the edge portion 8a of the welding electrode 2b. Here, the protruding portion 8c of the thermal cutting electrode 2c has a shape capable of linearly contacting the copper ribbon wire 4 along the line width of the copper ribbon wire 4 which is a ribbon-shaped wire. The linear shape of the protrusions 8b and 8c is not necessarily a continuous straight line as long as the current can be concentrated on the copper ribbon wire 4 as a ribbon-shaped wire, and may be a wavy line or a broken line.

いずれにしろ溶接用電極２ｂや熱切断用電極２ｃの突出部８ｂ，８ｃがリボン形状の線材たる銅リボン線４と線状に接触させると、銅リボン線４との線状に接触した部位に電流が集中するので、効率的な抵抗加熱によるリボン形状の線材たる銅リボン線４の熱切断が可能になる。また、リボン形状の線材たる銅リボン線４は、溶接用電極２ｂと熱切断用電極２ｃによって挟持され圧力も集中するので、溶接用電極２ｂと熱切断用電極２ｃとを挟持させる圧力が小さくても、銅リボン線４を比較的容易に熱切断することができる。   In any case, if the protruding portions 8b and 8c of the welding electrode 2b and the thermal cutting electrode 2c are brought into linear contact with the copper ribbon wire 4 which is a ribbon-shaped wire material, Since the current concentrates, it is possible to thermally cut the copper ribbon wire 4 which is a ribbon-shaped wire by efficient resistance heating. Further, since the copper ribbon wire 4 which is a ribbon-shaped wire is sandwiched between the welding electrode 2b and the thermal cutting electrode 2c and the pressure is concentrated, the pressure for sandwiching the welding electrode 2b and the thermal cutting electrode 2c is small. In addition, the copper ribbon wire 4 can be thermally cut relatively easily.

ここで、突出部８ｂ，８ｃの変形例について説明する。突出部８ｂ，８ｃは、溶接用電極２ｂや熱切断用電極２ｃの一方に設けてもよいし、溶接用電極２ｂおよび熱切断用電極２ｃの両方に突出部８ｂ，８ｃを設けてもよい。   Here, a modified example of the protrusions 8b and 8c will be described. The protruding portions 8b and 8c may be provided on one of the welding electrode 2b and the thermal cutting electrode 2c, or the protruding portions 8b and 8c may be provided on both the welding electrode 2b and the thermal cutting electrode 2c.

さらに、溶接用電極２ｂにおける突出部８ｂの形状は、リボン形状の線材たる銅リボン線４の線幅に沿って銅リボン線４に線状に接触可能な形状であればよく、図５に示す突出部８ｂの断面が半円形（図５（ａ）を参照）であるものに限らず、たとえば、突出部８ｂの断面が四角形（図５（ｂ）を参照）または突出部８ｂの断面が三角形（図５（ｃ），（ｄ）を参照）などの多角形であってもよい。突出部８ｂは、線材たる銅リボン線４の形状や材質特性などに応じて効果的に通電することが可能となる。なお、溶接用電極２ｂの突出部８ｂの変形例のみを図５で示しているが、熱切断用電極２ｃの突出部８ｃについても同様に、半円形、四角形や三角形などの多角形に形成させてもよい。また、溶接用電極２ｂにおける突出部８ｂの設置位置や熱切断用電極２ｃにおける突出部８ｃの設置位置は、リボン形状の線材たる銅リボン線４との線状に接触した部位に電流が集中できる限り、図５(ｄ)に示すごとく溶接用電極２ｂの最先端部に突出部８ｂを設ける必要もなく図５（ａ）に示すごとく溶接用電極２ｂの最先端部より前記基端部側に設けても良い。   Furthermore, the shape of the protruding portion 8b in the welding electrode 2b may be any shape that can linearly contact the copper ribbon wire 4 along the line width of the copper ribbon wire 4 that is a ribbon-shaped wire, as shown in FIG. The cross section of the protrusion 8b is not limited to a semicircular shape (see FIG. 5A). For example, the cross section of the protrusion 8b is a square (see FIG. 5B) or the cross section of the protrusion 8b is a triangle. It may be a polygon such as (see FIGS. 5C and 5D). The protrusion 8b can be energized effectively according to the shape, material characteristics, etc. of the copper ribbon wire 4 as a wire. Although only a modification of the protruding portion 8b of the welding electrode 2b is shown in FIG. 5, the protruding portion 8c of the thermal cutting electrode 2c is similarly formed into a polygon such as a semicircle, a rectangle, or a triangle. May be. Further, the current can be concentrated at the position where the protruding portion 8b in the welding electrode 2b and the position of the protruding portion 8c in the thermal cutting electrode 2c are in linear contact with the copper ribbon wire 4 which is a ribbon-shaped wire. However, as shown in FIG. 5 (d), it is not necessary to provide the protruding portion 8b at the most distal end portion of the welding electrode 2b, and as shown in FIG. 5 (a), the proximal end portion side from the most distal end portion of the welding electrode 2b. It may be provided.

次に、本実施形態の熱切断用電極２ｃは、銅リボン線４よりも融点および靭性が高い略直方体形状の板状体に形成している。熱切断用電極２ｃは、熱切断に際し、厚みの薄い板状体に形成していることにより厚みの厚い熱切断用電極２ｃと比較して印加電圧の低減に寄与する。熱切断用電極２ｃの前記線材よりも融点および靭性が高い材料としては、前記線材の材料にもよるが、たとえば、前記線材を銅リボン線４とした場合、モリブデン（Ｍｏ）、タングステン（Ｗ）などの金属や酸化セシウム（ＣｅＯ２）を分散させたモリブデン合金、銀タングステン合金などの合金を用いることができる。このような材料を用いることで、熱切断用電極２ｃは、銅リボン線４を狭持することで発生する応力による熱切断用電極２ｃの割れ、欠けや折れを防止することができる。また、このような材料を用いることで、熱切断用電極２ｃは、銅リボン線４の熱切断の際に抵抗加熱により生ずる熱で熱切断用電極２ｃが溶融することを防止することが可能となる。 Next, the thermal cutting electrode 2c of the present embodiment is formed in a substantially rectangular parallelepiped plate-like body having a higher melting point and toughness than the copper ribbon wire 4. The thermal cutting electrode 2c is formed in a thin plate-like body at the time of thermal cutting, thereby contributing to a reduction in applied voltage as compared with the thick thermal cutting electrode 2c. The material having a higher melting point and toughness than the wire of the thermal cutting electrode 2c depends on the material of the wire. For example, when the wire is a copper ribbon wire 4, molybdenum (Mo), tungsten (W) An alloy such as a molybdenum alloy in which a metal such as cesium oxide (CeO 2 ) is dispersed or a silver-tungsten alloy can be used. By using such a material, the thermal cutting electrode 2c can prevent cracking, chipping and breakage of the thermal cutting electrode 2c due to stress generated by pinching the copper ribbon wire 4. Further, by using such a material, the thermal cutting electrode 2c can prevent the thermal cutting electrode 2c from being melted by heat generated by resistance heating when the copper ribbon wire 4 is thermally cut. Become.

本実施形態の線材供給ユニット３は、配線基板５ａの電極ランド５ｂに圧接する銅リボン線４を供給可能なものであって、内部に上述の制御部からの制御信号に基づいて銅リボン線４の供給を行うための搬送部９を構成するモータ（図示せず）と、該モータの軸に固定させたローラを備えている。線材供給ユニット３は、搬送部９の前記ローラを回転させることにより、前記ローラと接する銅リボン線４を線材供給ユニット３のノズル端部３ａから搬出する。線材供給ユニット３は、搬送部９の前記モータの回転を前記制御部からの制御信号により制御することで銅リボン線４の搬出量を制御することができる。なお、搬送部９の前記ローラは、１つだけに限らず複数個設けてもよい。また、線材供給ユニット３には、余分な銅リボン線４が不要に搬出などされないように、あるいは、一度、線材供給ユニット３のノズル端部３ａから搬出した銅リボン線４が線材供給ユニット３の内部に戻らないように銅リボン線４を挟み込んで締め付けることで固定可能なワイヤクランプなど（図示せず）を備えてもよい。また、線材供給ユニット３は、銅リボン線４を収納するワイヤホルダ（図示せず）を備えてもよい。   The wire supply unit 3 of the present embodiment is capable of supplying the copper ribbon wire 4 that is in pressure contact with the electrode land 5b of the wiring board 5a, and the copper ribbon wire 4 based on the control signal from the control unit described above. The motor (not shown) which comprises the conveyance part 9 for performing supply of this, and the roller fixed to the shaft of this motor are provided. The wire rod supply unit 3 carries out the copper ribbon wire 4 in contact with the roller from the nozzle end portion 3 a of the wire rod supply unit 3 by rotating the roller of the transport unit 9. The wire supply unit 3 can control the carry-out amount of the copper ribbon wire 4 by controlling the rotation of the motor of the transport unit 9 by a control signal from the control unit. Note that the number of rollers in the transport unit 9 is not limited to one, and a plurality of rollers may be provided. Further, the copper ribbon wire 4 unloaded from the nozzle end portion 3a of the wire rod supply unit 3 once is removed from the wire rod supply unit 3 so that the extra copper ribbon wire 4 is not unnecessarily unloaded. You may provide the wire clamp etc. (not shown) which can be fixed by pinching | interposing and fastening the copper ribbon wire 4 so that it may not return inside. Further, the wire supply unit 3 may include a wire holder (not shown) that stores the copper ribbon wire 4.

また、線材供給ユニット３は、線材供給ユニット３のノズル端部３ａに沿って突出した熱切断用電極２ｃを備えており、熱切断用電極２ｃは、電源部７からの給電を受けて溶接用電極２ｂのエッジ部８ａとで銅リボン線４を挟持して銅リボン線４に通電することができる。線材供給ユニット３の内部には、銅リボン線４が搬出できるように貫通孔が構成され、少なくとも銅リボン線４と接触する前記貫通孔の内側面には絶縁部材が好適に用いられる。線材供給ユニット３の前記貫通孔に形成される前記絶縁部材としては、たとえば、銅リボン線４の搬送に伴う前記貫通孔の摩耗を抑制するために酸化アルミニウム材料からなるセラミックスの溶射皮膜などが挙げられる。   The wire supply unit 3 includes a thermal cutting electrode 2c protruding along the nozzle end 3a of the wire supply unit 3, and the thermal cutting electrode 2c receives power from the power supply unit 7 for welding. The copper ribbon wire 4 can be energized by sandwiching the copper ribbon wire 4 with the edge portion 8a of the electrode 2b. A through hole is formed inside the wire rod supply unit 3 so that the copper ribbon wire 4 can be carried out, and an insulating member is preferably used at least on the inner surface of the through hole in contact with the copper ribbon wire 4. Examples of the insulating member formed in the through hole of the wire supply unit 3 include a thermal spray coating of a ceramic made of an aluminum oxide material in order to suppress wear of the through hole accompanying the conveyance of the copper ribbon wire 4. It is done.

本実施形態において前記線材は、線材供給ユニット３のノズル端部３ａから搬送部９によって搬出され配線基板５ａの電極ランド５ｂ上へ圧接されるものである。前記線材は、電子部品と配線基板５ａの電極ランド５ｂや隣接する配線基板５ａ，５ａの電極ランド５ｂ，５ｂ間の電気的接続などに用いることができる。   In the present embodiment, the wire is unloaded from the nozzle end 3a of the wire supply unit 3 by the transport unit 9 and is pressed onto the electrode land 5b of the wiring board 5a. The wire can be used for electrical connection between the electronic component and the electrode land 5b of the wiring board 5a or between the electrode lands 5b and 5b of the adjacent wiring boards 5a and 5a.

前記線材としては、たとえば、金線、アルミニウム線、表面を金（Ａｕ）や錫（Ｓｎ）などでめっきした銅線などを用いることができる。抵抗溶接機１で配線基板５ａの電極ランド５ｂと圧接される前記線材は、断面形状が矩形のリボン形状だけでなく、円形や楕円形の線材など用途に応じて種々のものを用いることができる。   As the wire, for example, a gold wire, an aluminum wire, a copper wire whose surface is plated with gold (Au), tin (Sn), or the like can be used. The wire rod that is press-contacted to the electrode land 5b of the wiring board 5a by the resistance welder 1 can be used in various forms such as a ribbon shape having a rectangular cross section, or a circular or elliptical wire. .

前記基材としては、銅リボン線４と抵抗溶接により圧接されるものであり、たとえば、銅箔の電極ランド５ｂが一表面に形成されたガラスエポキシ基板など汎用の配線基板５ａ、半導体装置などの電子部品やセラミック基板などが挙げられる。前記基材は、銅リボン線４が抵抗溶接をすることができる限り特に限定されるものでもない。そのため、前記基材は、表面に金（Ａｕ）めっきした前記基材や配線基板５ａの電極ランド５ｂ上に表面の保護や電子部品の実装時の濡れ性を高めることを目的として半田レベラー処理などがされた半田コートした前記基材を用いてよい。   The base material is pressed against the copper ribbon wire 4 by resistance welding. For example, a general-purpose wiring board 5a such as a glass epoxy board having a copper foil electrode land 5b formed on one surface, a semiconductor device, etc. Examples include electronic parts and ceramic substrates. The base material is not particularly limited as long as the copper ribbon wire 4 can perform resistance welding. For this reason, the base material is solder leveler treatment or the like for the purpose of protecting the surface of the base material with the gold (Au) plating on the surface or the electrode land 5b of the wiring board 5a and improving the wettability when mounting electronic components. The above-mentioned base material coated with solder may be used.

抵抗溶接機１に好適に設けられる基台１０は、基台１０の一表面側に前記基材たる配線基板５ａ，５ａの電極ランド５ｂ，５ｂを積置し、安定的に固定保持が可能なものである。前記アームに設けられた溶接用電極２ａ，２ｂおよび熱切断用電極２ｃは、基台１０上の任意の位置に配置された配線基板５ａ，５ａの電極ランド５ｂ，５ｂに銅リボン線４を抵抗溶接および銅リボン線４の熱切断ができるように、３次元的に移動可能なように構成している。なお、基台１０上の配線基板５ａ，５ａの電極ランド５ｂ，５ｂは、複数個配置して順次、抵抗溶接を行ってもよいし、１個の配線基板５ａ上の複数個の電極ランド５ｂ，５ｂ間を抵抗溶接させてもよい。基台１０に固定配置した配線基板５ａ，５ａの電極ランド５ｂ，５ｂ間を銅リボン線４によって結線する場合、抵抗溶接機１は、たとえば、配線基板５ａ，５ａの電極ランド５ｂ，５ｂの三次元ＣＡＤデータなどから予め作成された配線基板５ａ，５ａの電極ランド５ｂ，５ｂの結線経路に基づいて前記アームを移動させればよい。   The base 10 suitably provided in the resistance welder 1 has the electrode lands 5b and 5b of the wiring substrates 5a and 5a as the base material placed on one surface side of the base 10 and can be stably fixed and held. Is. The welding electrodes 2a and 2b and the thermal cutting electrode 2c provided on the arm are configured to resist the copper ribbon wire 4 to the electrode lands 5b and 5b of the wiring boards 5a and 5a arranged at arbitrary positions on the base 10. It is configured to be movable three-dimensionally so that welding and thermal cutting of the copper ribbon wire 4 can be performed. Note that a plurality of electrode lands 5b, 5b of the wiring boards 5a, 5a on the base 10 may be arranged and sequentially subjected to resistance welding, or a plurality of electrode lands 5b on one wiring board 5a. , 5b may be resistance-welded. When the electrode lands 5b and 5b of the wiring boards 5a and 5a fixedly arranged on the base 10 are connected by the copper ribbon wire 4, the resistance welding machine 1 is, for example, the tertiary of the electrode lands 5b and 5b of the wiring boards 5a and 5a. The arm may be moved based on the connection path of the electrode lands 5b and 5b of the wiring boards 5a and 5a prepared in advance from the original CAD data.

次に、本実施形態の抵抗溶接機１を用いた抵抗溶接方法ついて、図２（ａ）〜（ｆ）に基づいて説明する。本実施形態の抵抗溶接方法においては、隣接する配線基板５ａ，５ａの電極ランド５ｂ，５ｂを銅リボン線４で結線させる例を挙げる。なお、図１における抵抗溶接機１の基台１０は、省略してある。   Next, a resistance welding method using the resistance welding machine 1 of the present embodiment will be described with reference to FIGS. In the resistance welding method of the present embodiment, an example in which the electrode lands 5b and 5b of the adjacent wiring boards 5a and 5a are connected by the copper ribbon wire 4 is given. In addition, the base 10 of the resistance welding machine 1 in FIG. 1 is omitted.

抵抗溶接機１は、線材供給ユニット３に内蔵した搬送部９の前記モータによって、前記ローラを回転させることにより、前記ローラと接する銅リボン線４を線材供給ユニット３のノズル端部３ａから搬出する。線材供給ユニット３は、搬送部９の前記モータの回転を前記制御部の制御信号に基づく電流量により制御することで銅リボン線４の搬出量を制御し、銅リボン線４を圧接する配線基板５ａの一表面側に設けられた電極ランド５ｂ上に供給する（図２（ａ））。なお、線材供給ユニット３は、銅リボン線４を必要量搬出した後、ワイヤクランプ（図示せず）などによって挟み込こんで締め付けることで固定している。   The resistance welding machine 1 carries out the copper ribbon wire 4 in contact with the roller from the nozzle end portion 3 a of the wire rod supply unit 3 by rotating the roller by the motor of the transport unit 9 built in the wire rod supply unit 3. . The wire supply unit 3 controls the amount of unloading of the copper ribbon wire 4 by controlling the rotation of the motor of the transport unit 9 by the amount of current based on the control signal of the control unit, and the wiring board that press-contacts the copper ribbon wire 4 It supplies on the electrode land 5b provided in the one surface side of 5a (FIG. 2 (a)). The wire supply unit 3 fixes the copper ribbon wire 4 by unloading the copper ribbon wire 4 and then clamping it by a wire clamp (not shown).

次に、抵抗溶接機１は、一方の配線基板５ａの電極ランド５ｂ上に供給された銅リボン線４を、抵抗溶接機１の一対の溶接用電極２ａ，２ｂを図２（ｂ）の白抜きの矢印の向きに沿って移動させて、前記一対の溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂと、前記一方の配線基板５ａの電極ランド５ｂと、で狭持させる。この状態で、抵抗溶接機１は、電源部７から一対の溶接用電極２ａ，２ｂ間に電圧を印加して給電することにより銅リボン線４を介して一対の溶接用電極２ａ，２ｂ間に電流を流す。これによって、抵抗溶接機１は、銅リボン線４の通電による抵抗加熱で生じたジュール熱により銅リボン線４を前記一方の配線基板５ａの電極ランド５ｂに抵抗溶接する抵抗溶接工程を行うことができる（図２（ｂ））。   Next, the resistance welding machine 1 uses the copper ribbon wire 4 supplied on the electrode land 5b of one wiring board 5a, and the pair of welding electrodes 2a and 2b of the resistance welding machine 1 as shown in white in FIG. It is moved along the direction of the blank arrow, and is sandwiched between the tip portions 2ab and 2bb of the pair of welding electrodes 2a and 2b and the electrode land 5b of the one wiring substrate 5a. In this state, the resistance welding machine 1 applies a voltage from the power supply unit 7 to the pair of welding electrodes 2a and 2b and supplies power to the pair of welding electrodes 2a and 2b via the copper ribbon wire 4. Apply current. Thus, the resistance welding machine 1 can perform a resistance welding process in which the copper ribbon wire 4 is resistance-welded to the electrode land 5b of the one wiring substrate 5a by Joule heat generated by resistance heating by energization of the copper ribbon wire 4. Yes (FIG. 2 (b)).

なお、図２（ｂ）において、電源部７から給電するために溶接用電極２ａを＋（プラス）、溶接用電極２ｂを−（マイナス）として接続する例を示しているが、銅リボン線４を介して電気的に接続される溶接用電極２ａ，２ｂ間に電位差が生じれば抵抗溶接は可能である。そのため、電源部７から給電するために溶接用電極２ａをマイナス、溶接用電極２ｂをプラスとして、電源部７と接続させてもよい。また、電源部７は、直流電源だけでなく交流電源を用いてもよい。電源部７は、商用電源を用いてもよいし電池電源を用いてもよい。抵抗溶接機１は、前記線材の材料が熱伝導性のよい材料の場合、電源部７を交流として溶接用電極２ａ，２ｂ間に電位差を設ける方がより好ましい。   2B shows an example in which the welding electrode 2a is connected as + (plus) and the welding electrode 2b is set as − (minus) in order to supply power from the power supply unit 7, but the copper ribbon wire 4 is shown. Resistance welding is possible if there is a potential difference between the welding electrodes 2a and 2b that are electrically connected via the wire. Therefore, in order to supply power from the power supply unit 7, the welding electrode 2 a may be negative and the welding electrode 2 b may be positive and connected to the power supply unit 7. The power supply unit 7 may use not only a DC power supply but also an AC power supply. The power supply unit 7 may use a commercial power supply or a battery power supply. In the resistance welding machine 1, when the material of the wire is a material having good thermal conductivity, it is more preferable to provide a potential difference between the welding electrodes 2a and 2b with the power supply unit 7 as an alternating current.

上述の抵抗溶接工程後に、抵抗溶接機１は、一対の溶接用電極２ａ，２ｂを銅リボン線４の一部が抵抗溶接された前記一方の配線基板５ａの電極ランド５ｂの上方に移動させて離し、最終的に他方の配線基板５ａの一表面側に設けられた電極ランド５ｂの方へ図２（ｃ）の白抜きの矢印の方向に向かって移動させる。この移動と同時に、線材供給ユニット３は、前記ワイヤクランプの締め付けを開放して、搬送部９の前記ローラを黒矢印の向きに回転させることにより、前記ローラと接する銅リボン線４を線材供給ユニット３のノズル端部３ａから搬出する。線材供給ユニット３は、搬送部９を制御して溶接用電極２ａ，２ｂの移動する距離に応じた長さの銅リボン線４よりも長い銅リボン線４を供給し、銅リボン線４に撓みを持たせるように銅リボン線４の搬出量を制御している（図２（ｃ））。なお、隣接する配線基板５ａ，５ａの電極ランド５ｂ，５ｂ間を銅リボン線４で結線させる場合、銅リボン線４が撓みを持つことで、銅リボン線４などの熱膨張収縮にともなう応力で銅リボン線４が断線することを防ぐことができる。   After the resistance welding process described above, the resistance welding machine 1 moves the pair of welding electrodes 2a and 2b above the electrode land 5b of the one wiring board 5a in which a part of the copper ribbon wire 4 is resistance welded. Finally, it is moved toward the electrode land 5b provided on the one surface side of the other wiring board 5a in the direction of the white arrow in FIG. Simultaneously with this movement, the wire rod supply unit 3 releases the tightening of the wire clamp and rotates the roller of the transport unit 9 in the direction of the black arrow, thereby causing the copper ribbon wire 4 in contact with the roller to move to the wire rod supply unit. 3 nozzle end 3a. The wire supply unit 3 supplies the copper ribbon wire 4 longer than the copper ribbon wire 4 having a length corresponding to the distance traveled by the welding electrodes 2a and 2b by controlling the transport unit 9, and bends to the copper ribbon wire 4. The amount of carry-out of the copper ribbon wire 4 is controlled so as to have a thickness (FIG. 2 (c)). When the electrode lands 5b and 5b of the adjacent wiring boards 5a and 5a are connected by the copper ribbon wire 4, the copper ribbon wire 4 is bent, so that stress due to thermal expansion and contraction of the copper ribbon wire 4 or the like is caused. It is possible to prevent the copper ribbon wire 4 from being disconnected.

続いて、抵抗溶接機１は、前記一方の配線基板５ａにおける電極ランド５ｂへの溶接と同様に、銅リボン線４の一部が抵抗溶接された前記他方の配線基板５ａの電極ランド５ｂ上に供給された銅リボン線４を、抵抗溶接機１の一対の溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂと、圧接させる前記他方の配線基板５ａの電極ランド５ｂとで狭持させる。すなわち、抵抗溶接機１の一対の溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂを図２（ｄ）の白抜きの矢印の方向に移動させている。この状態で、抵抗溶接機１は、電源部７から一対の溶接用電極２ａ，２ｂ間に電圧を印加して給電することにより銅リボン線４を介して一対の溶接用電極２ａ，２ｂ間に電流を流す。これにより抵抗溶接機１は、抵抗溶接により銅リボン線４をそれぞれ隣接する配線基板５ａ，５ａの電極ランド５ｂ，５ｂ間へ接続させた抵抗溶接工程を行うことができる（図２（ｄ））。   Subsequently, the resistance welding machine 1 applies the part of the copper ribbon wire 4 on the electrode land 5b of the other wiring board 5a to which a part of the copper ribbon wire 4 is resistance-welded, similarly to the welding to the electrode land 5b of the one wiring board 5a. The supplied copper ribbon wire 4 is sandwiched between the tip portions 2ab and 2bb of the pair of welding electrodes 2a and 2b of the resistance welding machine 1 and the electrode land 5b of the other wiring board 5a to be pressed. That is, the tip portions 2ab and 2bb of the pair of welding electrodes 2a and 2b of the resistance welder 1 are moved in the direction of the white arrow in FIG. In this state, the resistance welding machine 1 applies a voltage from the power supply unit 7 to the pair of welding electrodes 2a and 2b and supplies power to the pair of welding electrodes 2a and 2b via the copper ribbon wire 4. Apply current. Thereby, the resistance welding machine 1 can perform a resistance welding process in which the copper ribbon wire 4 is connected between the electrode lands 5b and 5b of the adjacent wiring boards 5a and 5a by resistance welding (FIG. 2D). .

引き続き、抵抗溶接機１は、一対の溶接用電極２ａ，２ｂを備えた前記アームを配線基板５ａの電極ランド５ｂの前記一表面と垂直方向（図２（ｅ）中の白抜きの矢印の方向）に移動させることにより、一対の溶接用電極２ａ，２ｂを銅リボン線４の一部が抵抗溶接された圧接位置よりも僅かに移動させ配線基板５ａの電極ランド５ｂから離す。また、抵抗溶接機１は、一対の溶接用電極２ａ，２ｂを配線基板５ａの電極ランド５ｂから離した後、銅リボン線４を、溶接用電極２ｂのエッジ部８ａと、溶接用電極２ｂに並設され線材供給ユニット３のノズル端部３ａから延在している熱切断用電極２ｃと、で挟時するように黒矢印の向きに線材供給ユニット３を溶接用電極２ｂ側へ移動させる（図２（ｅ））。   Subsequently, the resistance welder 1 moves the arm having the pair of welding electrodes 2a and 2b in a direction perpendicular to the one surface of the electrode land 5b of the wiring board 5a (the direction of the white arrow in FIG. 2E). ) To move the pair of welding electrodes 2a and 2b slightly from the press contact position where a part of the copper ribbon wire 4 is resistance-welded, and away from the electrode land 5b of the wiring board 5a. Further, the resistance welding machine 1 separates the pair of welding electrodes 2a and 2b from the electrode land 5b of the wiring board 5a, and then the copper ribbon wire 4 to the edge portion 8a of the welding electrode 2b and the welding electrode 2b. The wire rod supply unit 3 is moved to the welding electrode 2b side in the direction of the black arrow so as to be sandwiched between the thermal cutting electrode 2c extending in parallel from the nozzle end portion 3a of the wire rod supply unit 3 ( FIG. 2 (e)).

なお、線材供給ユニット３は、一対の溶接用電極２ａ，２ｂおよび線材供給ユニット３の移動と同時に、前記ワイヤクランプの締め付けを開放して、搬送部９の前記ローラを黒矢印の向きに回転させ配線基板５ａの電極ランド５ｂに抵抗溶接した銅リボン線４の一部に不要な応力が掛からないように銅リボン線４を供給している。   The wire supply unit 3 releases the tightening of the wire clamp simultaneously with the movement of the pair of welding electrodes 2a and 2b and the wire supply unit 3, and rotates the roller of the transport unit 9 in the direction of the black arrow. The copper ribbon wire 4 is supplied so that unnecessary stress is not applied to a part of the copper ribbon wire 4 resistance-welded to the electrode land 5b of the wiring board 5a.

次に、抵抗溶接機１は、線材供給ユニット３の搬送部９の前記ローラを銅リボン線４の搬出と逆回転させることにより、前記ローラと接する銅リボン線４を線材供給ユニット３のノズル端部３ａから潜在供給ユニット３の内部に引き戻すように銅リボン線４の長手方向に沿って銅リボン線４に張力を付与する。ここで、本実施形態の抵抗溶接機１では、搬送部９が張力付与手段６を兼ねることになる。この状態で、抵抗溶接機１は、電源部７から熱切断用電極２ｃと溶接用電極２ｂとの間に電圧を印加して給電することにより銅リボン線４を介して通電する。これにより、銅リボン線４は、銅リボン線４のうち溶接用電極２ｂと熱切断用電極２ｃとで挟持された部位に通電されることで抵抗加熱による熱が生じる。また、張力付与手段６が銅リボン線４に張力を付与しながら、熱切断用電極２ｃが銅リボン線４を溶接用電極２ｂ側へ押圧することにより、銅リボン線４は銅リボン線４の一部が配線基板５ａの電極ランド５ｂに圧接された近傍で熱切断される熱切断工程を行うことができる（図２（ｆ））。   Next, the resistance welding machine 1 rotates the roller of the conveyance unit 9 of the wire rod supply unit 3 in the reverse direction from the unloading of the copper ribbon wire 4 so that the copper ribbon wire 4 in contact with the roller is moved to the nozzle end of the wire rod supply unit 3. Tension is applied to the copper ribbon wire 4 along the longitudinal direction of the copper ribbon wire 4 so as to be pulled back from the portion 3a to the inside of the latent supply unit 3. Here, in the resistance welding machine 1 of the present embodiment, the transport unit 9 also serves as the tension applying means 6. In this state, the resistance welding machine 1 is energized through the copper ribbon wire 4 by applying a voltage from the power supply unit 7 between the thermal cutting electrode 2c and the welding electrode 2b to supply power. Thereby, the copper ribbon wire 4 is heated by resistance heating by energizing a portion of the copper ribbon wire 4 sandwiched between the welding electrode 2b and the thermal cutting electrode 2c. Further, while the tension applying means 6 applies tension to the copper ribbon wire 4, the thermal cutting electrode 2 c presses the copper ribbon wire 4 toward the welding electrode 2 b, so that the copper ribbon wire 4 becomes the copper ribbon wire 4. A thermal cutting process can be performed in which a part is thermally cut in the vicinity of the portion pressed against the electrode land 5b of the wiring board 5a (FIG. 2F).

前記線材として銅リボン線４を用いた場合、抵抗溶接機１は、たとえば、溶接用電極２ｂと熱切断用電極２ｃとで挟持された銅リボン線４が抵抗加熱により軟化（たとえば、軟化温度２００℃）し、銅リボン線４の軟化と同時に銅リボン線４の長手方向に張力を付与することにより銅リボン線４の断面積を減少させながら熱切断する形態となる。これにより、抵抗溶接機１は、銅リボン線４の接触抵抗が安定するため、熱切断に伴う熱切断用電極２ｃなどに生ずるスパークを抑制して熱切断に必要な電圧を低減できる。   When the copper ribbon wire 4 is used as the wire rod, the resistance welding machine 1 is configured so that, for example, the copper ribbon wire 4 sandwiched between the welding electrode 2b and the thermal cutting electrode 2c is softened by resistance heating (for example, a softening temperature of 200 C.), and by applying tension in the longitudinal direction of the copper ribbon wire 4 at the same time as the softening of the copper ribbon wire 4, the copper ribbon wire 4 is thermally cut while reducing the cross-sectional area. Thereby, since the contact resistance of the copper ribbon wire 4 is stabilized, the resistance welding machine 1 can suppress the spark generated in the electrode 2c for thermal cutting accompanying thermal cutting and reduce the voltage required for thermal cutting.

なお、抵抗溶接機１は、抵抗溶接するものによって前記線材を一対の溶接用電極２ａ，２ｂの先端部２ａｂ，２ｂｂによって配線基板５ａの電極ランド５ｂに押圧した状態で離間させずに、溶接用電極２ｂと熱切断用電極２ｃとで圧接された前記線材から延在する前記線材を熱切断することもできる。この場合、抵抗溶接機１は、一対の溶接用電極２ａ，２ｂ間に給電される電位差よりも、溶接用電極２ｂと熱切断用電極２ｃとの間に給電する電位差が大きくなるように、一対の溶接用電極２ａ，２ｂおよび熱切断用電極２ｃ間の電圧を制御すればよい。   The resistance welding machine 1 is used for welding without causing the wire rod to be separated by being pressed against the electrode land 5b of the wiring board 5a by the tip portions 2ab and 2bb of the pair of welding electrodes 2a and 2b. The wire extending from the wire pressed by the electrode 2b and the thermal cutting electrode 2c can be thermally cut. In this case, the resistance welding machine 1 is configured so that the potential difference supplied between the welding electrode 2b and the thermal cutting electrode 2c is larger than the potential difference supplied between the pair of welding electrodes 2a and 2b. The voltage between the welding electrodes 2a and 2b and the thermal cutting electrode 2c may be controlled.

なお、抵抗溶接機１は、上述の前記アームの移動と電源部７から一対の溶接用電極２ａ，２ｂへの給電を連続一体の流れとして行うこともできる。同様に、抵抗溶接機１は、銅リボン線４を溶接用電極２ｂと熱切断用電極２ｃとで挟持するのと、電源部７から溶接用電極２ｂと熱切断用電極２ｃとの給電を連続一体の流れとして行うこともできる。   In addition, the resistance welding machine 1 can also perform the above-mentioned movement of the arm and power feeding from the power supply unit 7 to the pair of welding electrodes 2a and 2b as a continuous and integral flow. Similarly, the resistance welding machine 1 continuously feeds the copper ribbon wire 4 between the welding electrode 2b and the thermal cutting electrode 2c and feeds power from the power source unit 7 to the welding electrode 2b and the thermal cutting electrode 2c. It can also be done as an integral flow.

本実施形態の抵抗溶接機１によれば、溶接用電極２ｂと熱切断用電極２ｃとで銅リボン線４を挟持して抵抗加熱により熱切断するので、切断刃では切断が難しいような銅リボン線４などでも容易に切断することができる。また、熱切断用電極２ｃが銅リボン線４を挟持する圧力は、切断刃により銅リボン線４を切断する際に銅リボン線４に掛かる圧力よりも小さくすることができる。すなわち、溶接用電極２ｂと熱切断用電極２ｃとの相対距離を可変とする駆動部には、前記電極ホルダに内装できるような小型モータなどを適用することができる。そのため、溶接用電極２ａ，２ｂに熱切断用電極２ｃを並設し溶接用電極２ａ，２ｂの周りが小型化可能な抵抗溶接機１とすることができる。   According to the resistance welding machine 1 of the present embodiment, since the copper ribbon wire 4 is sandwiched between the welding electrode 2b and the thermal cutting electrode 2c and thermally cut by resistance heating, the copper ribbon is difficult to cut with a cutting blade. The wire 4 can be easily cut. Further, the pressure at which the thermal cutting electrode 2c clamps the copper ribbon wire 4 can be made smaller than the pressure applied to the copper ribbon wire 4 when the copper ribbon wire 4 is cut by the cutting blade. That is, a small motor or the like that can be installed in the electrode holder can be applied to the drive unit that can change the relative distance between the welding electrode 2b and the thermal cutting electrode 2c. Therefore, the resistance welding machine 1 in which the thermal cutting electrode 2c is juxtaposed with the welding electrodes 2a and 2b and the size around the welding electrodes 2a and 2b can be reduced can be obtained.

（実施形態２）
本実施形態の抵抗溶接機１における基本構成は、実施形態１と略同一であり、図６に示すように溶接用電極２ｂが、前記電極ホルダに固定される基端部２ｂａ側の溶接用電極部位と、回転軸２ｂｃを介して回転可能に固定され導通可能な先端部２ｂｂ側の溶接用電極部位とを有し、突出部８ｂが先端部２ｂｂ側に設けられている点が異なる。なお、実施形態１と同様の構成要素には、同一の符号を付して説明を適宜省略する。 (Embodiment 2)
The basic configuration of the resistance welding machine 1 of the present embodiment is substantially the same as that of the first embodiment. As shown in FIG. 6, the welding electrode 2b is a welding electrode on the base end portion 2ba side fixed to the electrode holder. It differs in that it has a part and a welding electrode part on the side of the tip part 2bb that can be rotated and fixed via the rotating shaft 2bc, and the protruding part 8b is provided on the side of the tip part 2bb. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted suitably.

本実施形態の抵抗溶接機１は、銅リボン線４を熱切断用電極２ｃと挟持する突出部８ｂを溶接用電極２ｂの先端部２ｂｂ側に備えており、突出部８ｂはリボン形状の線材たる銅リボン線４の線幅に沿って銅リボン線４に線状に接触可能な形状であって、突出部８ｂがリボン形状の線材たる銅リボン線４の線幅方向と垂直な軸に対して回転可能な回転軸２ｂｃによって基端部２ｂａ側に備えられている。これにより、溶接用電極２ｂは、突出部８ｂが銅リボン線４との接触角度が可変となるように構成されることになる。   The resistance welding machine 1 of the present embodiment includes a protruding portion 8b that sandwiches the copper ribbon wire 4 with the thermal cutting electrode 2c on the tip end 2bb side of the welding electrode 2b, and the protruding portion 8b is a ribbon-shaped wire. A shape that can linearly contact the copper ribbon wire 4 along the line width of the copper ribbon wire 4 and the protrusion 8b is perpendicular to the line width direction of the copper ribbon wire 4 that is a ribbon-shaped wire. It is provided on the base end 2ba side by a rotatable rotating shaft 2bc. Thus, the welding electrode 2b is configured such that the contact angle between the protruding portion 8b and the copper ribbon wire 4 is variable.

抵抗溶接機１は、銅リボン線４の熱切断の際に、張力付与手段６によって銅リボン線４の長手方向に張力を付与しながら溶接用電極２ｂと熱切断用電極２ｃとで挟持する。銅リボン線４の熱切断の過程で銅リボン線４の形状が変形し、銅リボン線４が完全に熱切断される前に溶接用電極２ｂと熱切断用電極２ｃとが接触してしまうことがある。この場合、銅リボン線４は熱切断するのに十分な通電が行われなくなり、抵抗加熱による熱切断が十分でなくなる虞がある。   When the copper ribbon wire 4 is thermally cut, the resistance welder 1 is sandwiched between the welding electrode 2 b and the thermal cutting electrode 2 c while applying tension in the longitudinal direction of the copper ribbon wire 4 by the tension applying means 6. The shape of the copper ribbon wire 4 is deformed in the process of thermal cutting of the copper ribbon wire 4, and the welding electrode 2b and the thermal cutting electrode 2c come into contact before the copper ribbon wire 4 is completely thermally cut. There is. In this case, there is a possibility that the copper ribbon wire 4 is not energized enough for thermal cutting, and thermal cutting by resistance heating is not sufficient.

これに対して、本実施形態の抵抗溶接機１は、突出部８ｂと銅リボン線４との接触角度が回転軸２ｂｃによって適宜に変わり、抵抗加熱時における銅リボン線４の形状の変化に応じて突出部８ｂと銅リボン線４との接触が安定して熱切断をすることが可能となる。なお、可動式の突出部８ｂは、溶接用電極２ｂだけでなく、溶接用電極２ｂと熱切断用電極２ｃとの両方に設けられていてもよい。また、本実施形態の溶接用電極２ｂに設けられる突出部８ｂは、図６に示す断面形状が半円形のものだけに限られず、実施形態１と同様に種々の形状とすることができる。   On the other hand, in the resistance welding machine 1 of the present embodiment, the contact angle between the protruding portion 8b and the copper ribbon wire 4 is appropriately changed depending on the rotation shaft 2bc, and according to the change in the shape of the copper ribbon wire 4 during resistance heating. Thus, the contact between the protruding portion 8b and the copper ribbon wire 4 can be stably thermally cut. The movable protrusion 8b may be provided not only on the welding electrode 2b but also on both the welding electrode 2b and the thermal cutting electrode 2c. In addition, the protruding portion 8b provided on the welding electrode 2b of the present embodiment is not limited to the semicircular cross-sectional shape shown in FIG. 6 and can have various shapes as in the first embodiment.

また、溶接用電極２ｂに備えられ突出部８ｂを回転させる回転軸２ｂｃは、３６０度回転する必要はなく、回転軸２ｂｃの回転角は銅リボン線４の形状や厚み、溶接用電極２ｂと熱切断用電極２ｃで挟持させる圧力によって適宜設定すればよい。   Further, the rotating shaft 2bc provided on the welding electrode 2b and rotating the protrusion 8b does not need to rotate 360 degrees, and the rotation angle of the rotating shaft 2bc depends on the shape and thickness of the copper ribbon wire 4, the welding electrode 2b and the heat. What is necessary is just to set suitably with the pressure clamped with the electrode 2c for a cutting | disconnection.

１ 抵抗溶接機
２ａ，２ｂ 溶接用電極
２ｃ 熱切断用電極
２ｂｃ 回転軸
３ 線材供給ユニット
４ 銅リボン線（線材）
５ａ 配線基板
５ｂ 電極ランド
６ 張力付与手段
７ 電源部
８ａ エッジ部
８ｂ，８ｃ 突出部
９ 搬送部 DESCRIPTION OF SYMBOLS 1 Resistance welding machine 2a, 2b Welding electrode 2c Thermal cutting electrode 2bc Rotating shaft 3 Wire rod supply unit 4 Copper ribbon wire (wire rod)
5a Wiring board 5b Electrode land 6 Tension applying means 7 Power supply part 8a Edge part 8b, 8c Protruding part 9 Conveying part

Claims (8)

線材供給ユニットから供給された線材を介して基材にそれぞれ圧接する一対の溶接用電極を備え、電源部から前記一対の溶接用電極間に給電することにより前記線材に通電させて前記線材の一部を前記基材に抵抗溶接する抵抗溶接機であって、
前記線材を前記溶接用電極の少なくとも一方と挟持し前記線材に通電することにより該線材を熱切断する熱切断用電極と、前記熱切断に際し前記線材の長手方向に沿って該線材に張力を付与する張力付与手段と、を有することを特徴とする抵抗溶接機。 A pair of welding electrodes in contact with pressure to the substrate via the supplied wires from wire supply unit, one of the wires by supplying an electric current to the wire by feeding from the power supply unit between the pair of welding electrodes A resistance welding machine for resistance welding a part to the base material,
A thermal cutting electrode for thermally cutting the wire by sandwiching the wire with at least one of the welding electrodes and energizing the wire, and applying tension to the wire along the longitudinal direction of the wire during the thermal cutting And a tension welding means. 前記線材供給ユニットは、前記一対の溶接用電極に並設される前記熱切断用電極と、前記線材を前記基材に供給するために前記線材を搬送する搬送部と、を備え、該搬送部が前記張力付与手段を兼ねていることを特徴とする請求項１に記載の抵抗溶接機。   The wire supply unit includes the thermal cutting electrode arranged in parallel with the pair of welding electrodes, and a transport unit that transports the wire to supply the wire to the base, the transport unit The resistance welding machine according to claim 1, which also serves as the tension applying means. 前記熱切断用電極は、前記線材よりも融点および靭性が高い板状体であることを特徴とする請求項１または請求項２に記載の抵抗溶接機。   The resistance welding machine according to claim 1 or 2, wherein the thermal cutting electrode is a plate-like body having a higher melting point and toughness than the wire. 前記溶接用電極は、リボン形状の前記線材を前記熱切断用電極と挟持するエッジ部を備えてなることを特徴とする請求項１ないし請求項３のいずれか１項に記載の抵抗溶接機。   The resistance welding machine according to any one of claims 1 to 3, wherein the welding electrode includes an edge portion that sandwiches the ribbon-shaped wire rod with the thermal cutting electrode. 前記溶接用電極は、前記線材を前記熱切断用電極と挟持する突出部を備えており、前記突出部はリボン形状の前記線材の線幅に沿って前記線材に線状に接触可能な形状であることを特徴とする請求項１ないし請求項３のいずれか１項に記載の抵抗溶接機。   The welding electrode includes a protruding portion that sandwiches the wire with the thermal cutting electrode, and the protruding portion has a shape that can linearly contact the wire along the line width of the ribbon-shaped wire. The resistance welding machine according to any one of claims 1 to 3, wherein the resistance welding machine is provided. 前記熱切断用電極は、前記線材を前記溶接用電極と挟持する突出部を備えており、前記突出部はリボン形状の前記線材の線幅に沿って前記線材に線状に接触可能な形状であることを特徴とする請求項４または請求項５に記載の抵抗溶接機。   The thermal cutting electrode includes a protruding portion that sandwiches the wire with the welding electrode, and the protruding portion has a shape that can linearly contact the wire along the line width of the ribbon-shaped wire. 6. The resistance welder according to claim 4, wherein the resistance welder is provided. 前記突出部は、該突出部がリボン形状の前記線材の線幅方向と垂直な軸に対して回転可能な回転軸に備えられてなることを特徴とする請求項５または請求項６に記載の抵抗溶接機。   The said protrusion part is equipped with the rotating shaft in which this protrusion part can rotate with respect to the axis | shaft perpendicular | vertical to the line | wire width direction of the said ribbon-shaped wire rod, The Claim 5 or Claim 6 characterized by the above-mentioned. Resistance welding machine. 一対の溶接用電極と、基材との間で線材を挟持し前記一対の溶接用電極間に前記線材を介して通電することによって前記線材の一部を前記基材に抵抗溶接する抵抗溶接工程と、
前記抵抗溶接工程後に、前記一対の溶接用電極を前記基材から離して前記線材を該溶接用電極の一方と熱切断用電極とで挟持すると共に、前記線材の長手方向に沿って該線材に張力を付与しながら前記熱切断用電極と前記溶接用電極との間に前記線材を介して通電して前記線材を熱切断する熱切断工程と、を有することを特徴とする抵抗溶接方法。 A welding electrode a pair, resistance welding a portion of the wire to the substrate by passing through the wire between clamping and the pair of welding electrodes the wire between the base resistor Welding process;
After the resistance welding step, the pair of welding electrodes are separated from the base material and the wire is sandwiched between one of the welding electrodes and a thermal cutting electrode, and the wire is disposed along the longitudinal direction of the wire. A resistance welding method, comprising: a thermal cutting step of thermally cutting the wire by energizing the wire between the thermal cutting electrode and the welding electrode while applying tension.
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