JP2005074473A - Laser beam welding equipment - Google Patents

Laser beam welding equipment Download PDF

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JP2005074473A
JP2005074473A JP2003308288A JP2003308288A JP2005074473A JP 2005074473 A JP2005074473 A JP 2005074473A JP 2003308288 A JP2003308288 A JP 2003308288A JP 2003308288 A JP2003308288 A JP 2003308288A JP 2005074473 A JP2005074473 A JP 2005074473A
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air
laser beam
cylindrical case
cylindrical member
laser welding
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JP4170857B2 (en
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Shunichi Unno
俊一 海野
Jun Kitagawa
純 北川
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser beam welding equipment not causing cost increase and capable of preventing the occurrence of cracks in a welded portion by suppressing thermal strain generated by the expansion due to laser beam welding of a cylindrical member. <P>SOLUTION: In the equipment, the occurrence of the cracks can be prevented by reducing the thermal strain due to the thermal expansion in the welding portion of the cylindrical case 5 by jetting air in a tangential direction of the cylindrical case 5 of an abutting portion from an air nozzle 7 disposed at the downstream side of the welding position irradiated with a laser beam from a laser beam welding head 2 of the abutting portion of the cylindrical case 5 and a sealing lid 6 in terms of the rotational direction of the cylindrical case 5 so as not to interfere with a shield gas atmosphere around the welding position of the abutting portion irradiated with the laser beam. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、レーザ溶接装置に関し、特に被溶接部材としての円筒部材と該円筒部材の少なくとも一方の開口を封止する封止部材とを回転自在に支持してその軸回りに回転させながら、円筒部材と封止部材との溶接部に、レーザ光を照射すると共にシールドガスを噴射してレーザ溶接するレーザ溶接装置に関する。   TECHNICAL FIELD The present invention relates to a laser welding apparatus, and in particular, a cylindrical member as a member to be welded and a sealing member that seals at least one opening of the cylindrical member so as to be rotatable and rotated around an axis thereof. The present invention relates to a laser welding apparatus that performs laser welding by irradiating a welding portion between a member and a sealing member with laser light and injecting a shielding gas.

レーザ溶接装置を用い、薄肉の円筒部材の開口部に封止部材を突き合わせて該円筒部材の軸回りに回転させながら両者の突き合わせ部をレーザ溶接する際において、円筒部材が熱膨張係数が大きい材質（例えば、アルミニウムやアルミニウム合金など）の場合、溶接される両者の突き合わせ部において、溶接による熱で円筒部材が熱膨張して熱歪が生じる。このため、特に溶接される両者の突き合わせ部の周方向後半において、無理な応力がかかって円筒部材の溶接部にクラックが発生する虞があった。   A material with a large thermal expansion coefficient when a laser welding device is used to laser weld the butted portion of the cylindrical member while a sealing member is butted against the opening of the thin-walled cylindrical member and rotated around the axis of the cylindrical member In the case of (for example, aluminum or aluminum alloy), the cylindrical member thermally expands due to heat generated by welding at the abutting portion between the two to be welded, resulting in thermal distortion. For this reason, there is a possibility that cracks may occur in the welded portion of the cylindrical member due to excessive stress applied particularly in the second half in the circumferential direction of the butted portions of the two welded portions.

このため、レーザ溶接装置を用い、薄肉の円筒部材の開口部に封止部材を突き合わせて該円筒部材の軸回りに回転させながら両者の突き合わせ部を溶接する際において、従来より、円筒部材の回転方向に対してレーザ溶接ヘッドの下流側に、分流した溶接用のシールドガスの一部を噴射する冷却ノズルを設け、レーザ光の照射で溶融した溶融金属をレーザ溶接ヘッドの下流側で冷却するようにしたレーザ溶接装置が提案されている（例えば、特許文献１参照。）。
特開２００３−７１５７９号公報（図１） For this reason, when a sealing member is abutted against an opening of a thin cylindrical member using a laser welding apparatus and the two butted portions are welded while rotating around the axis of the cylindrical member, the rotation of the cylindrical member is conventionally performed. A cooling nozzle is provided on the downstream side of the laser welding head with respect to the direction to inject a part of the shield gas for welding that has been split, so that the molten metal melted by the laser light irradiation is cooled on the downstream side of the laser welding head. There has been proposed a laser welding apparatus (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2003-71579 (FIG. 1)

ところで、上記特許文献１に開示されているレーザ溶接装置では、冷却用気体として溶接用のシールドガス（例えばHe）を使用しているので、高価なシールドガスの使用量が増加することにより、コストが高くなるという問題があった。   By the way, in the laser welding apparatus disclosed in Patent Document 1, since a shielding gas for welding (for example, He) is used as a cooling gas, the amount of expensive shielding gas used increases, resulting in an increase in cost. There was a problem that became high.

そこで本発明は、コスト高を招くことなく、円筒部材の熱膨張によって生じる熱歪を抑えて溶接部にクラックが発生することを防止することができるレーザ溶接装置を提供することを目的とする。   Therefore, an object of the present invention is to provide a laser welding apparatus that can prevent thermal cracks caused by thermal expansion of a cylindrical member and prevent cracks from occurring in a welded part without incurring high costs.

上記目的を達成するために本発明は、被溶接部材としての円筒部材と該円筒部材の少なくとも一方の開口を封止する封止部材とを回転自在に支持してその軸回りに回転させながら、前記円筒部材と前記封止部材との溶接部に、レーザ溶接ヘッドからレーザ光を照射すると共にシールドガスノズルからシールドガスを噴射してレーザ溶接するレーザ溶接装置であって、前記円筒部材の回転方向に対して前記溶接部のレーザ照射される溶接位置の下流側に、エア供給手段から供給されるエアを噴射するエアノズルを備え、前記エアノズルは、前記溶接部のレーザ照射される溶接位置周囲の前記シールドガス雰囲気に干渉しないようにして、前記溶接部の前記円筒部材の接線方向に向けてエアを噴射するように配置されていることを特徴としている。   In order to achieve the above object, the present invention supports a cylindrical member as a member to be welded and a sealing member that seals at least one opening of the cylindrical member in a rotatable manner and rotates it around its axis. A laser welding apparatus for performing laser welding by irradiating a laser beam from a laser welding head to a welding portion between the cylindrical member and the sealing member and injecting a shielding gas from a shielding gas nozzle, in the rotation direction of the cylindrical member In contrast, an air nozzle that injects air supplied from an air supply unit is provided downstream of the welding position of the welded portion that is irradiated with laser, and the air nozzle is shielded around the welded position of the welded portion that is irradiated with laser. It is characterized by being arranged to inject air toward the tangential direction of the cylindrical member of the welded part so as not to interfere with the gas atmosphere.

また、前記エアノズルのエアが噴出される先端側を、前記円筒部材の軸方向に対して該円筒部材側に向けて傾斜させていることを特徴としている。   Further, the front end side of the air nozzle from which the air is ejected is inclined toward the cylindrical member side with respect to the axial direction of the cylindrical member.

（作用）
請求項１に記載の発明によれば、円筒部材の回転方向に対して溶接部のレーザ照射される溶接位置の下流側に設けたエアノズルから、溶接部のレーザ照射される溶接位置周囲のシールドガス雰囲気に干渉しないようにして、溶接部の前記円筒部材の接線方向に向けてエアを噴射することにより、レーザ溶接した直後の溶接部に吹付けられたエアによって空冷することができるので、コスト高を招くことなく、円筒部材の溶接部での熱膨張による熱歪を低減してクラックの発生を防止することができる。 (Function)
According to the first aspect of the present invention, the shielding gas around the welding position where the laser beam of the welded part is irradiated from the air nozzle provided on the downstream side of the welding position where the laser beam of the welded part is irradiated with respect to the rotation direction of the cylindrical member. By injecting air toward the tangential direction of the cylindrical member of the welded part so as not to interfere with the atmosphere, air can be cooled by the air blown to the welded part immediately after laser welding. Without incurring cracks, it is possible to reduce thermal strain due to thermal expansion at the welded portion of the cylindrical member and prevent occurrence of cracks.

また、請求項２に記載の発明によれば、エアノズルのエアが噴出される先端側を、円筒部材の軸方向に対して該円筒部材側に向けて傾斜させたことにより、エアノズルから噴出すエアを、レーザ溶接した直後の溶接部及びその円筒部材側付近に吹付けることができるので、溶接部の円筒部材側付近においても熱膨張による熱歪を低減することができる。   According to the second aspect of the present invention, the air ejected from the air nozzle is formed by inclining the tip side from which the air from the air nozzle is ejected toward the cylindrical member with respect to the axial direction of the cylindrical member. Can be sprayed on the welded part immediately after laser welding and the vicinity of the cylindrical member side of the welded part, so that thermal strain due to thermal expansion can be reduced also in the vicinity of the cylindrical member side of the welded part.

本発明によれば、円筒部材の回転方向に対して溶接部のレーザ照射される溶接位置の下流側に設けたエアノズルから、溶接部のレーザ照射される位置周囲のシールドガス雰囲気に干渉しないようにして、溶接部の円筒部材の接線方向に向けてエアを噴射することにより、コスト高を招くことなく、円筒部材の溶接部での熱膨張による熱歪を低減してクラックの発生を防止することができる。   According to the present invention, the air nozzle provided on the downstream side of the welding position where the laser beam of the welded part is irradiated with respect to the rotation direction of the cylindrical member is prevented from interfering with the shield gas atmosphere around the laser irradiated position of the welded part. In addition, by injecting air toward the tangential direction of the cylindrical member of the welded part, it is possible to reduce the thermal strain due to thermal expansion at the welded part of the cylindrical member and prevent the occurrence of cracks without incurring high costs. Can do.

以下、本発明を図示の実施の形態に基づいて説明する。   Hereinafter, the present invention will be described based on the illustrated embodiments.

〈実施の形態１〉
図１は、本発明の実施の形態１に係るレーザ溶接装置を示す概略構成図である。図１に示すように、本実施の形態に係るレーザ溶接装置１は、レーザ溶接ヘッド２、レーザ発信器３、シールドガスとしてのHe（ヘリウム）をレーザ溶接ヘッド２に供給すシールドガス供給部４、被溶接部材としての円筒ケース５及びその開口部を封止する封止蓋６との突き合わせ部（溶接部）近傍にエアを噴射するエアノズル７、エアノズル７にエアを供給するエア供給部８、及びレーザ発信器３、シールドガス供給部４、エア供給部８、円筒ケース５をその軸回りに回転駆動するモータ９等を制御する制御部１０を備えている。 <Embodiment 1>
FIG. 1 is a schematic configuration diagram showing a laser welding apparatus according to Embodiment 1 of the present invention. As shown in FIG. 1, a laser welding apparatus 1 according to the present embodiment includes a laser welding head 2, a laser transmitter 3, and a shield gas supply unit 4 that supplies He (helium) as a shield gas to the laser welding head 2. An air nozzle 7 for injecting air to the vicinity of a butted portion (welded portion) with a cylindrical case 5 as a member to be welded and a sealing lid 6 for sealing the opening thereof; an air supply portion 8 for supplying air to the air nozzle 7; And a control unit 10 that controls a laser 9, a shield gas supply unit 4, an air supply unit 8, a motor 9 that rotationally drives the cylindrical case 5 around its axis, and the like.

レーザ溶接ヘッド２は、レーザ光が出射される先端側が鉛直下方に向くように設置されており、その下方には支持部材（不図示）により水平状態で回転自在に支持された円筒ケース５と封止蓋６との突き合わせ部（溶接部）１１（図２参照）が位置している。円筒ケース５と封止蓋６は、駆動力伝達系（不図示）を介して連結されているモータ９の駆動によって時計回り（右回り）に所定の回転速度で回転される。   The laser welding head 2 is installed so that the front end side from which the laser beam is emitted is directed vertically downward, and below that is sealed with a cylindrical case 5 rotatably supported in a horizontal state by a support member (not shown). A butting portion (welded portion) 11 (see FIG. 2) with the stop lid 6 is located. The cylindrical case 5 and the sealing lid 6 are rotated clockwise (clockwise) at a predetermined rotational speed by driving a motor 9 connected via a driving force transmission system (not shown).

円筒ケース５は、本実施の形態では電気自動車やハイブリッドカーなどで使用される蓄電手段としてのキャパシタのアルミニウム合金からなる薄肉状のケースであり、一端側が開口して他端側が閉じられている。この円筒ケース５内には、不図示の正極板、負極板、複数のセルなどが配置されている。円筒ケース５の開口を封止する封止蓋６はアルミニウム合金からなり、円筒ケース５の開口に突き合わされる封止面は、円筒状ケース５の開口の外径と同じ径に形成されている。   The cylindrical case 5 is a thin-walled case made of an aluminum alloy of a capacitor as a power storage means used in an electric vehicle, a hybrid car, or the like in the present embodiment, and has one end opened and the other end closed. In the cylindrical case 5, a positive electrode plate, a negative electrode plate, a plurality of cells, etc. (not shown) are arranged. The sealing lid 6 that seals the opening of the cylindrical case 5 is made of an aluminum alloy, and the sealing surface that faces the opening of the cylindrical case 5 is formed to have the same diameter as the outer diameter of the opening of the cylindrical case 5. .

レーザ発信器３は、本実施の形態ではＹＡＣレーザ光を出力し、光ファイバー１２を介して伝送され、レーザ溶接ヘッド２内の集光光学系（不図示）で集光されて、円筒状ケース５と封止蓋６との突き合わせ部１１の溶接位置に照射される。   In the present embodiment, the laser transmitter 3 outputs a YAC laser beam, is transmitted through the optical fiber 12, is condensed by a condensing optical system (not shown) in the laser welding head 2, and is formed into a cylindrical case 5. And the welding position of the butted portion 11 between the sealing lid 6 and the sealing lid 6.

シールドガス供給部４は、シールドガス（本実施の形態ではHe）を、供給管１３を通してレーザ溶接ヘッド２の外周に設けたシールドガスノズル１４の先端から突き合わせ部１１の溶接位置周囲に吹付ける。   The shield gas supply unit 4 sprays a shield gas (He in this embodiment) around the welding position of the butting unit 11 from the tip of the shield gas nozzle 14 provided on the outer periphery of the laser welding head 2 through the supply pipe 13.

エア供給部８から供給されるエアを噴射するエアノズル７は、円筒ケース５の回転方向に対して、レーザ溶接ヘッド２からレーザ光Ｌが照射される突き合わせ部１１の溶接位置の下流側で、かつシールドガスノズル１４から突き合わせ部１１の溶接位置に噴射されるシールドガス雰囲気の外側近傍に位置するようにして設置されている。   The air nozzle 7 for injecting the air supplied from the air supply unit 8 is downstream of the welding position of the butting unit 11 irradiated with the laser light L from the laser welding head 2 with respect to the rotation direction of the cylindrical case 5, and It is installed so as to be located in the vicinity of the outside of the shield gas atmosphere injected from the shield gas nozzle 14 to the welding position of the butt 11.

エアノズル７の位置について更に詳細に説明すると、図３に示すように、エアノズル７のエアが噴出す先端部は円筒ケース５の表面に近接し、かつエアの噴出し方向が円筒ケース５の接線方向となるように設置されている。本実施の形態では、エアノズル７の先端側は、水平状態に設置された円筒ケース５の中心を通る鉛直軸に対して所定の角度θ1（本実施の形態では約１４°）に傾けて設置されており、円筒ケース５の接線方向に向けてエアを噴射するようにしている。 The position of the air nozzle 7 will be described in more detail. As shown in FIG. 3, the tip of the air nozzle 7 from which air is ejected is close to the surface of the cylindrical case 5, and the air ejection direction is the tangential direction of the cylindrical case 5. It is installed to become. In the present embodiment, the front end side of the air nozzle 7 is installed at a predetermined angle θ 1 (about 14 ° in the present embodiment) with respect to a vertical axis passing through the center of the cylindrical case 5 installed in a horizontal state. The air is jetted toward the tangential direction of the cylindrical case 5.

更に、図２に示すように、エアノズル７の先端側が、水平に設置された円筒ケース５の軸方向に対して円筒ケース５側に所定の角度θ2（本実施の形態では約６０°）に傾けて設置されており、円筒ケース５と封止蓋６との突き合わせ部１１付近から円筒ケース５側に向けてエアを噴射するようにしている。 Further, as shown in FIG. 2, the front end side of the air nozzle 7 is at a predetermined angle θ 2 (about 60 ° in the present embodiment) toward the cylindrical case 5 with respect to the axial direction of the horizontally installed cylindrical case 5. It is installed at an angle, and air is jetted from the vicinity of the butting portion 11 between the cylindrical case 5 and the sealing lid 6 toward the cylindrical case 5.

次に、上記した本実施の形態に係るレーザ溶接装置１によるレーザ溶接動作について説明する。   Next, the laser welding operation by the laser welding apparatus 1 according to the above-described embodiment will be described.

図１に示すように、水平に設置された被溶接部材としてのキャパシタの円筒ケース５の開口部とこの開口部を封止する封止蓋６との突き合わせ部１１をレーザ溶接する際において、円筒ケース５と封止蓋６とを突き合わせた状態で、制御部１０の制御によってモータ９を駆動し、駆動力伝達系（不図示）を介して回転自在に支持された円筒ケース５と封止蓋６を時計回り（右回り）に所定の回転速度で回転させる。   As shown in FIG. 1, when laser welding is performed on a butted portion 11 of an opening of a cylindrical case 5 of a capacitor as a member to be welded installed horizontally and a sealing lid 6 that seals the opening, a cylinder is used. In a state where the case 5 and the sealing lid 6 are in contact with each other, the motor 9 is driven by the control of the control unit 10, and the cylindrical case 5 and the sealing lid are rotatably supported via a driving force transmission system (not shown). 6 is rotated clockwise (clockwise) at a predetermined rotation speed.

そして、レーザ発信器３から出力されるレーザ光（本実施の形態ではＹＡＣレーザ光）を光ファイバー１２を介してレーザ溶接ヘッド２に伝送し、レーザ溶接ヘッド２内の集光光学系（不図示）で集光して、所定の回転速度で回転している円筒ケース５と封止蓋６との突き合わせ部１１の溶接位置にレーザ光Ｌを照射し、突き合わせ部１１の全周にわたってレーザ溶接を行う。   Then, laser light (YAC laser light in the present embodiment) output from the laser transmitter 3 is transmitted to the laser welding head 2 via the optical fiber 12, and a condensing optical system (not shown) in the laser welding head 2 is transmitted. The laser beam L is applied to the welding position of the abutting portion 11 between the cylindrical case 5 and the sealing lid 6 rotating at a predetermined rotation speed, and laser welding is performed over the entire circumference of the abutting portion 11. .

この際、シールドガス供給部４から供給管１３を通してシールドガスノズル１４内にシールドガス（本実施の形態ではHe）を供給して、シールドガスノズル１４の先端からシールドガスを突き合わせ部１１の溶接位置周囲に噴射し、溶接部分の酸化等を防止する。   At this time, the shield gas (He in this embodiment) is supplied from the shield gas supply unit 4 through the supply pipe 13 into the shield gas nozzle 14, and the shield gas is supplied from the tip of the shield gas nozzle 14 to the periphery of the welding position of the butt 11. Spray to prevent oxidation of welded parts.

そして、上述した溶接時において、エア供給部８から供給されるエアをエアノズル７の先端から円筒ケース５の接線方向に向けて噴射し、円筒ケース５の回転方向に対してレーザ溶接ヘッド２から突き合わせ部１１にレーザ光Ｌを照射する溶接位置の下流側を冷却する。また、図２に示すように、エアノズル７の先端側を、円筒ケース５の軸方向に対して円筒ケース５側に所定の角度θ2（本実施の形態では約６０°）に傾けているので、エアノズル７から噴出すエアは、円筒ケース５の接線方向で突き合わせ部１１及びその円筒ケース５側付近に吹付けられる。 During the above-described welding, the air supplied from the air supply unit 8 is jetted from the tip of the air nozzle 7 toward the tangential direction of the cylindrical case 5, and is abutted from the laser welding head 2 with respect to the rotational direction of the cylindrical case 5. The downstream side of the welding position where the laser beam L is irradiated to the part 11 is cooled. Further, as shown in FIG. 2, the front end side of the air nozzle 7 is inclined at a predetermined angle θ 2 (about 60 ° in the present embodiment) toward the cylindrical case 5 with respect to the axial direction of the cylindrical case 5. The air ejected from the air nozzle 7 is blown to the butting portion 11 and the vicinity of the cylindrical case 5 in the tangential direction of the cylindrical case 5.

このように、エアノズル７から噴射されるエアによってレーザ溶接された直後の高温になっている突き合わせ部１１及びその円筒ケース５側付近の温度上昇を大幅に抑えることができる。   In this way, the temperature rise in the vicinity of the butted portion 11 and its cylindrical case 5 that are at a high temperature immediately after laser welding by the air jetted from the air nozzle 7 can be significantly suppressed.

よって、コスト高を招くことなく、円筒ケース５の突き合わせ部１１近傍での熱膨張による熱歪を低減してクラックの発生を防止することができるので、突き合わせ部１１の全周にわたって良好なレーザ溶接を行うことができる。   Therefore, since the thermal strain due to thermal expansion in the vicinity of the butt portion 11 of the cylindrical case 5 can be reduced and cracks can be prevented without incurring high costs, good laser welding can be performed over the entire circumference of the butt portion 11. It can be performed.

また、エアノズル７を、円筒ケース５の回転方向に対して、レーザ溶接ヘッド２からレーザ光Ｌが照射される突き合わせ部１１の溶接位置の下流側で、かつシールドガスノズル１４から突き合わせ部１１の溶接位置に噴射されるシールドガス雰囲気の外側近傍に位置するようにして設置したことにより、噴射されるエアが、溶接位置近傍に噴射されるシールドガス雰囲気を乱すことはなく、高品質な溶接を行うことができる。   Further, the air nozzle 7 is positioned downstream of the welding position of the abutting portion 11 irradiated with the laser light L from the laser welding head 2 with respect to the rotation direction of the cylindrical case 5, and the welding position of the abutting portion 11 from the shield gas nozzle 14. Because it is installed so that it is located near the outside of the shielding gas atmosphere that is sprayed on, high-quality welding is performed without disturbing the shielding gas atmosphere that is sprayed near the welding position. Can do.

〈実施の形態２〉
実施の形態１では、エアノズル７の先端側を円筒ケース５の中心を通る鉛直軸に対して所定の角度θ1に傾けて、円筒ケース５の接線方向に向けてエアを噴射するようにしていたが、図４に示すように、エアノズル７の先端側を円筒ケース５に対して鉛直方向上方から水平方向までの範囲の任意の位置において、円筒ケース５の接線方向に向けてエアを噴射するようにしてもよい。なお、本実施の形態においても、図２に示したように、エアノズル７の先端側が、水平に設置された円筒ケース５の軸方向に対して円筒ケース５側に所定の角度θ2に傾けて設置されている。他の構成は実施の形態１と同様であり、重複する説明は省略する。 <Embodiment 2>
In the first embodiment, the front end side of the air nozzle 7 is inclined at a predetermined angle θ 1 with respect to the vertical axis passing through the center of the cylindrical case 5 so that air is jetted in the tangential direction of the cylindrical case 5. However, as shown in FIG. 4, air is jetted toward the tangential direction of the cylindrical case 5 at an arbitrary position in the range from the upper side in the vertical direction to the horizontal direction with respect to the cylindrical case 5 on the front end side of the air nozzle 7. It may be. Also in the present embodiment, as shown in FIG. 2, the front end side of the air nozzle 7 is inclined at a predetermined angle θ 2 toward the cylindrical case 5 with respect to the axial direction of the horizontally installed cylindrical case 5. is set up. Other configurations are the same as those of the first embodiment, and redundant description is omitted.

本実施の形態においても、実施の形態１と同様に、エアノズル７から噴射されるエアにより、コスト高を招くことなく、円筒ケース５の突き合わせ部１１近傍での熱膨張による熱歪を低減してクラックの発生を防止することができるので、突き合わせ部１１の全周にわたって良好なレーザ溶接を行うことができる。   Also in the present embodiment, as in the first embodiment, the air jetted from the air nozzle 7 reduces thermal distortion due to thermal expansion in the vicinity of the butt portion 11 of the cylindrical case 5 without incurring high costs. Since the generation of cracks can be prevented, good laser welding can be performed over the entire circumference of the butt portion 11.

また、実施の形態１と同様に、エアノズル７から噴射されるエアが、溶接位置近傍に噴射されるシールドガス雰囲気を乱すことはなく、高品質な溶接を行うことができる。   Further, as in the first embodiment, the air injected from the air nozzle 7 does not disturb the shield gas atmosphere injected in the vicinity of the welding position, and high-quality welding can be performed.

〈実施の形態３〉
本実施の形態では、図５に示すように、先端近傍を折り曲げたエアノズル７の先端側を、レーザ溶接ヘッド２から突き合わせ部１１にレーザ光Ｌを照射する溶接位置の下流側で、シールドガスノズル１４から突き合わせ部１１に噴射されるシールドガス雰囲気の周囲近傍に位置するようにして設置して、レーザ溶接ヘッド２からレーザ照射される突き合わせ部１１の溶接位置周囲に形成されるシールドガス雰囲気の周囲近傍から、円筒ケース５の接線方向に向けてエアを噴射するようにした。 <Embodiment 3>
In the present embodiment, as shown in FIG. 5, the shield gas nozzle 14 is provided on the downstream side of the welding position where the laser beam L is irradiated from the laser welding head 2 to the butting portion 11 at the distal end side of the air nozzle 7 bent near the distal end. It is installed so as to be located in the vicinity of the periphery of the shielding gas atmosphere injected from the laser welding head 11 to the vicinity of the periphery of the shielding gas atmosphere formed around the welding position of the butting part 11 irradiated with laser from the laser welding head 2 From the above, air is jetted toward the tangential direction of the cylindrical case 5.

なお、本実施の形態においても、図３に示したように、エアノズル７の先端側が、水平に設置された円筒ケース５の軸方向に対して円筒ケース５側に所定の角度θ2に傾けて設置されている。他の構成は実施の形態１と同様であり、重複する説明は省略する。 Also in the present embodiment, as shown in FIG. 3, the tip side of the air nozzle 7 is inclined at a predetermined angle θ 2 toward the cylindrical case 5 with respect to the axial direction of the cylindrical case 5 installed horizontally. is set up. Other configurations are the same as those of the first embodiment, and redundant description is omitted.

本実施の形態においても、実施の形態１と同様に、エアノズル７から噴射されるエアにより、コスト高を招くことなく、円筒ケース５の突き合わせ部１１近傍での熱膨張による熱歪を低減してクラックの発生を防止することができるので、突き合わせ部１１の全周にわたって良好なレーザ溶接を行うことができる。   Also in the present embodiment, as in the first embodiment, the air jetted from the air nozzle 7 reduces thermal distortion due to thermal expansion in the vicinity of the butt portion 11 of the cylindrical case 5 without incurring high costs. Since the generation of cracks can be prevented, good laser welding can be performed over the entire circumference of the butt portion 11.

また、実施の形態１と同様に、エアノズル７から噴射されるエアが、溶接位置近傍に噴射されるシールドガス雰囲気を乱すことはなく、高品質な溶接を行うことができる。   Further, as in the first embodiment, the air injected from the air nozzle 7 does not disturb the shield gas atmosphere injected in the vicinity of the welding position, and high-quality welding can be performed.

なお、上述した各実施の形態では、被溶接部材としてキャパシタの円筒ケース５の開口部とこの開口部を封止する封止蓋６との突き合わせ部１１をレーザ溶接する場合であったが、これに限定されることはなく、各種の円筒部材の開口とこの開口を封止する封止部材との溶接においても同様に本発明を適用することができる。   In each of the embodiments described above, the butt portion 11 between the opening of the cylindrical case 5 of the capacitor as a member to be welded and the sealing lid 6 that seals the opening is laser-welded. However, the present invention is also applicable to welding of openings of various cylindrical members and sealing members that seal the openings.

本発明の実施の形態１に係るレーザ溶接装置を示す概略構成図。The schematic block diagram which shows the laser welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係るレーザ溶接装置のエアノズルの設置位置を示す図。The figure which shows the installation position of the air nozzle of the laser welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係るレーザ溶接装置のエアノズルの設置位置を示す図。The figure which shows the installation position of the air nozzle of the laser welding apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係るレーザ溶接装置のエアノズルの設置位置を示す図。The figure which shows the installation position of the air nozzle of the laser welding apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係るレーザ溶接装置のエアノズルの設置位置を示す図。The figure which shows the installation position of the air nozzle of the laser welding apparatus which concerns on Embodiment 3 of this invention.

符号の説明Explanation of symbols

１ レーザ溶接装置
２ レーザ溶接ヘッド
３ レーザ発信器
４ シールドガス供給部
５ 円筒ケース（円筒部材）
６ 封止蓋（封止部材）
７ エアノズル
８ エア供給部（エア供給手段）
９ モータ
１０ 制御部
１１ 突き合わせ部（溶接部）
１４ シールドガスノズル

DESCRIPTION OF SYMBOLS 1 Laser welding apparatus 2 Laser welding head 3 Laser transmitter 4 Shield gas supply part 5 Cylindrical case (cylindrical member)
6 Sealing lid (sealing member)
7 Air nozzle 8 Air supply part (Air supply means)
9 Motor 10 Control part 11 Butt part (welded part)
14 Shield gas nozzle

Claims (2)

被溶接部材としての円筒部材と該円筒部材の少なくとも一方の開口を封止する封止部材とを回転自在に支持してその軸回りに回転させながら、前記円筒部材と前記封止部材との溶接部に、レーザ溶接ヘッドからレーザ光を照射すると共にシールドガスノズルからシールドガスを噴射してレーザ溶接するレーザ溶接装置であって、
前記円筒部材の回転方向に対して前記溶接部のレーザ照射される溶接位置の下流側に、エア供給手段から供給されるエアを噴射するエアノズルを備え、
前記エアノズルは、前記溶接部のレーザ照射される溶接位置周囲の前記シールドガス雰囲気に干渉しないようにして、前記溶接部の前記円筒部材の接線方向に向けてエアを噴射するように配置されている、
ことを特徴とするレーザ溶接装置。 While the cylindrical member as the member to be welded and the sealing member for sealing at least one opening of the cylindrical member are rotatably supported and rotated around the axis, the cylindrical member and the sealing member are welded. A laser welding apparatus for irradiating a laser beam from a laser welding head to the part and injecting a shield gas from a shield gas nozzle to perform laser welding,
An air nozzle that injects air supplied from an air supply means on the downstream side of the welding position where the laser beam of the welding portion is irradiated with respect to the rotation direction of the cylindrical member;
The air nozzle is arranged so as to inject air toward the tangential direction of the cylindrical member of the welded part so as not to interfere with the shielding gas atmosphere around the welding position where the laser beam of the welded part is irradiated. ,
A laser welding apparatus characterized by that. 前記エアノズルのエアが噴出される先端側を、前記円筒部材の軸方向に対して該円筒部材側に向けて傾斜させている、
ことを特徴とする請求項１に記載のレーザ溶接装置。

The front end side from which the air of the air nozzle is ejected is inclined toward the cylindrical member side with respect to the axial direction of the cylindrical member.
The laser welding apparatus according to claim 1.

JP2003308288A 2003-09-01 2003-09-01 Laser welding equipment Expired - Fee Related JP4170857B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013157151A (en) * 2012-01-27 2013-08-15 Komatsu Ntc Ltd Battery case sealing apparatus and battery case sealing method
JP2014147944A (en) * 2013-01-31 2014-08-21 Noritz Corp Laser welding method, apparatus of the same, and tank manufacturing method using the method
JP2015526298A (en) * 2012-08-31 2015-09-10 ポスコ Laser welding method and laser welding member using the same
CN113814562A (en) * 2021-10-13 2021-12-21 宜宾上交大新材料研究中心 Laser welding method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013157151A (en) * 2012-01-27 2013-08-15 Komatsu Ntc Ltd Battery case sealing apparatus and battery case sealing method
JP2015526298A (en) * 2012-08-31 2015-09-10 ポスコ Laser welding method and laser welding member using the same
JP2014147944A (en) * 2013-01-31 2014-08-21 Noritz Corp Laser welding method, apparatus of the same, and tank manufacturing method using the method
CN113814562A (en) * 2021-10-13 2021-12-21 宜宾上交大新材料研究中心 Laser welding method

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