JP2009202226A - Welding structure of low-output laser beam - Google Patents
Welding structure of low-output laser beam Download PDFInfo
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- JP2009202226A JP2009202226A JP2008050059A JP2008050059A JP2009202226A JP 2009202226 A JP2009202226 A JP 2009202226A JP 2008050059 A JP2008050059 A JP 2008050059A JP 2008050059 A JP2008050059 A JP 2008050059A JP 2009202226 A JP2009202226 A JP 2009202226A
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Abstract
Description
本発明は、レーザ反射率の高い金属同士の溶接に、低出力のレーザを用いて溶接する技術に関する。 The present invention relates to a technique for welding metals having high laser reflectivity using a low-power laser.
従来、レーザ反射率の高い金属（例えばＣｕなど）にレーザ溶接をする場合には出力の大きいレーザを用いなければならなかった。
例えば、突合せ面（図４Ａ）、重ね合わせ（図４Ｂ）、重ね隅肉（図４Ｃ）、横重ね（図４Ｄ）のような構造では、突合せや重ねのギャップが少しでもあると安定した溶接ができないという問題がある。
Conventionally, when laser welding is performed on a metal having a high laser reflectivity (for example, Cu), a laser having a high output must be used.
For example, in a structure such as a butt surface (FIG. 4A), an overlap (FIG. 4B), an overlap fillet (FIG. 4C), and a horizontal overlap (FIG. 4D), stable welding can be achieved if there is a slight gap between butt and overlap. There is a problem that you can not.
また、レーザ溶接する場合は、図４Ａ〜Ｄに示すようにレーザ光４５の照射部４４を、金属材料（第１部材４１、第２部材４２：母材）と溶接補助材料４３の上面に対して垂直方向に配置して、照射部４４からレーザ光４５を第１部材４１、第２部材４２と溶接補助材料４３の上面に照射して溶接を行うと、第１部材４１、第２部材４２の厚さによって安定した溶接ができないという問題がある。 Further, when laser welding is performed, as shown in FIGS. 4A to 4D, the irradiation portion 44 of the laser beam 45 is applied to the metal material (first member 41, second member 42: base material) and the upper surface of the welding auxiliary material 43. When the welding is performed by irradiating the upper surface of the first member 41, the second member 42, and the welding auxiliary material 43 with the laser beam 45 from the irradiation unit 44, the first member 41, the second member 42 are disposed. There is a problem that stable welding cannot be performed depending on the thickness of the steel.
例えば、第１部材４１の上方からレーザ光４５を照射したときに、第１部材４１の暑さが大きいと、第２部材４２まで十分にレーザ光４５が届かず、第２部材４２が十分に溶融されないため溶接が上手くできない。 For example, when the laser beam 45 is irradiated from above the first member 41 and the heat of the first member 41 is large, the laser beam 45 does not reach the second member 42 sufficiently, and the second member 42 is sufficiently Since it is not melted, welding cannot be performed well.
特許文献１では、一方のアルミニウム薄板の外面と他方のアルミニウム薄板の端面部とを面一に合わせ、レーザ光集束径Ｄ、端面部の厚さｔ、溶融部溶融径ｄとの間で、Ｄ／２＜ｔ＜ｄ／２の関係が成立する範囲でレーザ光を照射して溶接するアルミニウム薄板やアルミニウム合金薄板同士のレーザ溶接方法が提案されている。 In Patent Document 1, the outer surface of one aluminum thin plate and the end surface portion of the other aluminum thin plate are flush with each other, and the laser beam focusing diameter D, the thickness t of the end surface portion, and the melting portion melting diameter d are D Laser welding methods of aluminum thin plates and aluminum alloy thin plates that are welded by irradiating laser light within a range where the relationship of / 2 <t <d / 2 is established have been proposed.
特許文献２では、第１部材と第２部材とを重ね合わせ溶接してなる溶接構造である。重ね合わせ部における第１部材の先端部には、第１部材の外表面に溶接熱源を照射して第１部材と第２部材とを溶融凝固させてなる先端溶接部を形成してあり、かつ、先端溶接部の先端面と第２部材表面との角度は９０度以上に設けてある。応力集中を緩和することができ、疲労強度に優れた重ね合わせ継手を有する溶接構造及びその溶接方法が提案されている。 In patent document 2, it is a welding structure formed by laminating and welding a first member and a second member. A tip welding portion formed by irradiating the outer surface of the first member with a welding heat source to melt and solidify the first member and the second member at the tip portion of the first member in the overlapping portion; and The angle between the tip surface of the tip weld and the surface of the second member is 90 degrees or more. A welded structure having a lap joint that can alleviate stress concentration and has excellent fatigue strength, and a welding method therefor have been proposed.
特許文献３では、電気接続箱のバスバーにおけるパターン部分にタブ端子部材をレーザ溶接する際におけるタブ端子部材とバスバーのパターン部分の相対的な位置ずれを小さくする提案がされている。治具の保持面に断面が略鍵穴形状（回転非対称形状）の位置決めボスを設け、バスバーのパターン部分及び当該パターン部分に溶接されるタブ端子部材の被溶接部分にそれぞれ位置決めボスと嵌合するほぼ同形状の嵌合穴、を形成し、治具上にバスバーのパターン部分及びタブ端子部材を位置決め保持した状態でレーザ光Ｘを被溶接部分に照射し、バスバーのパターン部分にタブ端子部材を溶接する。
上記のような実情に鑑みてなされたものであり、レーザ反射率の高い金属同士のレーザ溶接に低出力のレーザを用い、突合せや重ねのギャップがあっても安定して溶接可能な低出力レーザの溶接構造を提供することを目的とする。 A low power laser that has been made in view of the above circumstances, and uses a low power laser for laser welding of metals with high laser reflectivity, and can be welded stably even when there is a butt or overlap gap. An object of the present invention is to provide a welded structure.
態様のひとつである第１部材と第２部材とを重ね合わせてなる重ね合わせ部を有する低出力レーザの溶接構造であって、前記第１部材は、前記重ね合わせ部に先端面を有し、前記先端面を前記重ね合わせ部の接触面と続く前記第２部材の表面に対して前記第１部材の前記先端面が略１３５度以上を形成し、前記第１部材の前記先端面が受光するレーザ光の照射部の位置は、前記先端面に対して略垂直方向にあることを特徴とする低出力レーザの溶接構造である。 A welding structure of a low-power laser having an overlapping portion formed by overlapping a first member and a second member, which is one of the aspects, wherein the first member has a tip surface at the overlapping portion, The tip surface of the first member forms approximately 135 degrees or more with respect to the surface of the second member following the contact surface of the overlapping portion with the tip surface, and the tip surface of the first member receives light. The position of the laser beam irradiating portion is in a direction substantially perpendicular to the tip surface, and this is a low power laser welding structure.
また、前記第１部材は、先端部を略４５度に面取りした先端面を有する。
また、前記先端面が受光するレーザ光の照射部の位置は、前記先端面に対して少なくとも角度を有する方向にある。
In addition, the first member has a tip surface whose tip is chamfered at approximately 45 degrees.
Further, the position of the laser beam irradiation portion received by the tip surface is in a direction having at least an angle with respect to the tip surface.
前記第２部材は前記接触面と反対の面に弾性を有する弾性部を設ける。 The second member is provided with an elastic portion having elasticity on a surface opposite to the contact surface.
開示の低出力レーザの溶接構造は、レーザ反射率の高い金属同士のレーザ溶接に低出力のレーザを用い、突合せや重ねのギャップがあっても安定した溶接ができる。 The disclosed low-power laser welding structure uses a low-power laser for laser welding of metals having high laser reflectivity, and can perform stable welding even when there is a butt or overlap gap.
以下図面に基づいて、本発明の実施形態について詳細を説明する。
（実施例１）
図１は、第１部材１と第２部材２とを重ね合わせて低出力レーザ溶接をする構造を示す斜視図である。例えば第１部材１、第２部材２は銅（Ｃｕ）などのレーザ反射率の高い板状の金属である。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Example 1
FIG. 1 is a perspective view showing a structure in which the first member 1 and the second member 2 are overlapped to perform low-power laser welding. For example, the first member 1 and the second member 2 are plate-like metals having high laser reflectivity such as copper (Cu).
第１部材１は、第２部材２と重ね合わせてなる重ね合わせ部７に先端面６を有している。先端面６は照射部４から照射されるレーザ光５を受光部９で受光する。
図２Ａに先端面６と第２部材２との関係を示す側面図であり、重ね合わせ部７の拡大した図を示す。先端面６は重ね合わせ部７の第１部材１と第２部材２の接触面８と続く第２部材２の表面に対して略１３５度の角度を形成している。
The first member 1 has a front end surface 6 in an overlapping portion 7 that is overlapped with the second member 2. The front end surface 6 receives the laser beam 5 emitted from the irradiation unit 4 by the light receiving unit 9.
FIG. 2A is a side view showing the relationship between the tip surface 6 and the second member 2, and shows an enlarged view of the overlapping portion 7. The front end surface 6 forms an angle of approximately 135 degrees with respect to the contact surface 8 of the first member 1 and the second member 2 of the overlapping portion 7 and the subsequent surface of the second member 2.
図２Ｂは先端部６とレーザ光５の関係を示す側面図である。照射部４の位置は、先端面６に低出力のレーザ光５を効率よく照射するためにレーザ光５は第２部材２表面に対して角度略４５度方向にある。 FIG. 2B is a side view showing the relationship between the tip 6 and the laser beam 5. The irradiation unit 4 is positioned at an angle of approximately 45 degrees with respect to the surface of the second member 2 in order to efficiently irradiate the tip surface 6 with the low-power laser beam 5.
また、先端面６が受光するレーザ光５の照射部４の位置は、先端面６に対して少なくとも略垂直方向を有する方向にあることが望ましい。
ここで、レーザ光５はパルス発振式の低出力のレーザとして、例えばＹＡＧレーザなどを用いている。
The position of the irradiation part 4 of the laser beam 5 received by the tip surface 6 is preferably in a direction having at least a substantially vertical direction with respect to the tip surface 6.
Here, the laser beam 5 uses, for example, a YAG laser as a pulse oscillation type low output laser.
図２Ｃは従来の照射位置からのレーザ光５の照射と、本発明の照射位置からのレーザ光５の照射を示す図である。
従来の照射位置から破線範囲１０に照射した場合には、第１部材１の厚さである距離Ｘ１を貫通した後に第２部材２に届く。本発明の照射位置から破線範囲９に照射した場合には斜め方向から先端面６に対してレーザ光５が照射されるため距離ｍ１を貫通したのちに第２部材２に届く。
FIG. 2C is a diagram showing irradiation of the laser beam 5 from the conventional irradiation position and irradiation of the laser beam 5 from the irradiation position of the present invention.
When the broken line range 10 is irradiated from the conventional irradiation position, it reaches the second member 2 after passing through the distance X1 which is the thickness of the first member 1. When the broken line area 9 is irradiated from the irradiation position of the present invention, the laser beam 5 is irradiated to the front end surface 6 from an oblique direction, and therefore reaches the second member 2 after passing through the distance m1.
距離Ｘ１と距離ｍ１との関係はｍ１＜Ｘ１であるため、破線範囲９に照射するレーザ光５の出力電力（Ｗ）は、破線範囲１０に照射する場合に比べて低い電力で、安定した溶接を行うことができる。
（実施例２）
図３は第２部材２に弾性部１１を設けた場合の構造を示す斜視図である。
Since the relationship between the distance X1 and the distance m1 is m1 <X1, the output power (W) of the laser beam 5 irradiating the broken line range 9 is lower than that when irradiating the broken line range 10, and stable welding is performed. It can be performed.
(Example 2)
FIG. 3 is a perspective view showing a structure when the elastic member 11 is provided on the second member 2.
第２部材２は接触面８と反対の面１２に弾性を有する弾性部１１を設けている。弾性部１１は、図３に示すように板状の金属を折り曲げ加工してバネのようにして弾性を持たせた構成である。 The second member 2 is provided with an elastic portion 11 having elasticity on a surface 12 opposite to the contact surface 8. As shown in FIG. 3, the elastic part 11 has a configuration in which a plate-like metal is bent to give elasticity like a spring.
なお、本例では折り曲げ加工により弾性を持たせたが、特にこの形状に限定するものではない。第１部材１と第２部材２が重ね合わさる部分である接触面８に突合せや重ねのギャップが最小になるようにできればよい。 In this example, elasticity is given by bending, but it is not particularly limited to this shape. What is necessary is just to be able to make the gap of a butt | matching or a stack | superposition minimum on the contact surface 8 which is a part which the 1st member 1 and the 2nd member 2 overlap.
また、本発明は、上記実施の形態に限定されるものでなく、本発明の要旨を逸脱しない範囲内で種々の改良、変更が可能である。 The present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the gist of the present invention.
１ 第１部材、
２ 第２部材、
４ 照射部、
５ レーザ光、
６ 先端面、
７ 重ね合わせ部、
８ 接触面、
９ 受光部
４１ 第１部材、
４２ 第２部材、
４３ 溶接補助材料、
４４ 照射部、
４５ レーザ光、
1 first member,
2 second member,
4 Irradiation part,
5 Laser light,
6 Tip surface,
7 Overlapping part,
8 contact surface,
9 light-receiving part 41 1st member,
42 second member,
43 Welding auxiliary materials,
44 Irradiation part,
45 Laser light,
Claims (4)
前記第１部材は、前記重ね合わせ部に先端面を有し、前記先端面を前記重ね合わせ部の接触面と続く前記第２部材の表面に対して前記第１部材の前記先端面が略１３５度以上を形成し、前記第１部材の前記先端面が受光するレーザ光の照射部の位置は、前記先端面に対して略垂直方向にあることを特徴とする低出力レーザの溶接構造。 A welding structure for a low-power laser having an overlapping portion formed by overlapping a first member and a second member,
The first member has a distal end surface at the overlapping portion, and the distal end surface of the first member is approximately 135 with respect to a surface of the second member that continues the distal end surface with a contact surface of the overlapping portion. A welding structure for a low-power laser, wherein the position of the laser beam irradiation portion received by the tip surface of the first member is substantially perpendicular to the tip surface.
請求項１に記載の低出力レーザの溶接構造。 The first member has a distal end surface chamfered at a distal end portion of approximately 45 degrees,
The welding structure of the low power laser according to claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008050059A JP2009202226A (en) | 2008-02-29 | 2008-02-29 | Welding structure of low-output laser beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008050059A JP2009202226A (en) | 2008-02-29 | 2008-02-29 | Welding structure of low-output laser beam |
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| Publication Number | Publication Date |
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| JP2009202226A true JP2009202226A (en) | 2009-09-10 |
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| JP2008050059A Withdrawn JP2009202226A (en) | 2008-02-29 | 2008-02-29 | Welding structure of low-output laser beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149785A (en) * | 2015-10-28 | 2015-12-16 | 无锡汉神电气有限公司 | Lap joint laser welding technology for 0.5 mm aluminum alloy plate |
| CN108544062A (en) * | 2018-04-19 | 2018-09-18 | 辽宁忠旺铝合金精深加工有限公司 | A kind of automatic welding method for welding of aluminium alloy sheet |
| WO2022254648A1 (en) * | 2021-06-03 | 2022-12-08 | 株式会社ニコン | Shaping apparatus and shaping method |
-
2008
- 2008-02-29 JP JP2008050059A patent/JP2009202226A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149785A (en) * | 2015-10-28 | 2015-12-16 | 无锡汉神电气有限公司 | Lap joint laser welding technology for 0.5 mm aluminum alloy plate |
| CN108544062A (en) * | 2018-04-19 | 2018-09-18 | 辽宁忠旺铝合金精深加工有限公司 | A kind of automatic welding method for welding of aluminium alloy sheet |
| CN108544062B (en) * | 2018-04-19 | 2020-09-18 | 辽宁忠旺铝合金精深加工有限公司 | Automatic welding method for aluminum alloy sheet |
| WO2022254648A1 (en) * | 2021-06-03 | 2022-12-08 | 株式会社ニコン | Shaping apparatus and shaping method |
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