JP3325221B2 - Laser welding structure of bus bar - Google Patents
Laser welding structure of bus barInfo
- Publication number
- JP3325221B2 JP3325221B2 JP04970098A JP4970098A JP3325221B2 JP 3325221 B2 JP3325221 B2 JP 3325221B2 JP 04970098 A JP04970098 A JP 04970098A JP 4970098 A JP4970098 A JP 4970098A JP 3325221 B2 JP3325221 B2 JP 3325221B2
- Authority
- JP
- Japan
- Prior art keywords
- bus bar
- tab terminal
- bent portion
- welding
- laser welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Laser Beam Processing (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気接続箱に収容
するバスバーに最適なレーザ溶接構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser welding structure most suitable for a bus bar housed in an electric junction box.
【０００２】[0002]
【従来の技術】従来、図８（ａ）に示すように、電線１
の導体２を圧着接続する圧着端子３の圧着部３ａにレー
ザビームＬＢを照射し、圧着部３ａと導体２とを溶融し
て溶接するものが提案されている（特願平２−１０３８
７８６号参照）。2. Description of the Related Art Conventionally, as shown in FIG.
A laser beam LB is applied to a crimping portion 3a of a crimp terminal 3 for crimping and connecting the conductor 2 to fuse the crimping portion 3a and the conductor 2 and weld them (Japanese Patent Application No. 2-1038).
No. 786).
【０００３】また、図８（ｂ）に示すように、平板状の
溶接用金属導体部４に溶融体積補充用の別体の金属製突
出部５を設け、この突出部５の下側に複数の素線２ａよ
り成る導体２を配置して、突出部５にレーザビームＬＢ
を照射することにより、突出部５を導体２とともに溶融
して溶接するものも提案されている（特開平６−３０２
３４１号参照）。[0003] As shown in FIG. 8 (b), a separate metal projection 5 for replenishing the molten volume is provided on the flat metal welding conductor 4, and a plurality of metal projections are provided below the projection 5. The conductor 2 composed of the element wire 2a is arranged, and the laser beam LB is
Irradiation is performed to fuse and weld the protruding portion 5 together with the conductor 2 (Japanese Patent Laid-Open No. 6-302).
No. 341).
【０００４】ところで、自動車用ワイヤーハーネス等を
種々の電装品に分岐接続するのに用いられる電気接続箱
は、分岐接続点を１個所に集中させて、配線を合理的か
つ経済的に分岐接続するものであり、ワイヤーハーネス
の高密度化に伴って、車種別又は用途別に種々の形式の
ものが開発されている。By the way, in an electric junction box used for branch connection of an automobile wire harness or the like to various electric components, the branch connection points are concentrated at one place, and the wiring is rationally and economically connected. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.
【０００５】上記のような電気接続箱としては、図７に
示すように、プレス金型でフープ材６からバスバー７Ａ
〜７Ｃをそれぞれ打ち抜き、この各バスバー７Ａ〜７Ｃ
のパターン部からタブ端子７ａ，７ｂを上下方向にそれ
ぞれ切り起こすと共に、各バスバー７Ａ〜７Ｃの間に絶
縁板８Ａ〜８Ｃをそれぞれ介設して積層し、これを電気
接続箱９のアッパーケース９Ａとロアケース９Ｂとに収
容したものが有る。[0005] As shown in FIG. 7, the electric connection box is formed by pressing a hoop material 6 from a bus bar 7 A with a press die.
To 7C, and each of the bus bars 7A to 7C
The tab terminals 7a and 7b are cut and raised from the pattern portion in the vertical direction, and insulating plates 8A to 8C are interposed between the bus bars 7A to 7C, respectively. And a lower case 9B.
【０００６】上記各バスバー７Ａ〜７Ｃは、図６にその
一部を詳細に示すように、各タブ端子７ａ，７ｂはバス
バー７Ａ〜７Ｃのパターン部の端末から一体的に切り起
こしているので、パターン部の中間部にタブ端子７ａ，
７ｂを設けることができず、また、パターン部にタブ端
子７ａ，７ｂを切り起こすためのデッドスペースが生じ
る。As shown in detail in FIG. 6, each of the bus bars 7A to 7C has a tab terminal 7a, 7b integrally cut and raised from a terminal of a pattern portion of the bus bar 7A to 7C. A tab terminal 7a is provided at an intermediate portion of the pattern portion.
7b cannot be provided, and a dead space for cutting and raising the tab terminals 7a and 7b occurs in the pattern portion.
【０００７】このため、図５に示すように、バスバー７
（Ａ〜Ｃ）のパターン部に別体のタブ端子７ａの曲げし
ろ部７ｂを当てがって、この曲げしろ部７ｂをバスバー
７（Ａ〜Ｃ）パターン部にレーザービームＬＢで溶接ａ
する構造が提案されつつある。For this reason, as shown in FIG.
The bent portion 7b of the separate tab terminal 7a is applied to the pattern portion (A to C), and the bent portion 7b is welded to the bus bar 7 (A to C) pattern portion by the laser beam LB.
Structures are being proposed.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、タブ端
子７ａの曲げしろ部７ｂの１個所をスポット溶接するだ
けであったから、このスポット溶接の強度が安定しない
ので、剪断（剥離）方向（図５において上下方向）の強
度を充分に保証できないという問題があった。However, since only one spot of the bent portion 7b of the tab terminal 7a is spot-welded, the strength of this spot welding is not stable, so that the shear (peeling) direction (see FIG. 5). There is a problem that the strength in the vertical direction cannot be sufficiently guaranteed.
【０００９】本発明は、上記従来の問題を解決するため
になされたもので、バスバーにタブ端子を溶接したとき
の剪断（剥離）方向の強度を充分に保証できるバスバー
のレーザ溶接構造を提供することを目的とするものであ
る。The present invention has been made in order to solve the above-mentioned conventional problems, and provides a laser welding structure of a bus bar which can sufficiently guarantee the strength in a shearing (peeling) direction when a tab terminal is welded to a bus bar. The purpose is to do so.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
に、本発明は、電気接続箱に収容するバスバーのレーザ
溶接構造であって、バスバーのパターン部の一部に、上
方に切り起こして逆Ｌ字状に折り曲げてなる折り曲げ部
を形成し、この折り曲げ部の下面に、Ｌ字状に形成した
タブ端子の曲げしろ部を重ね合わせ、かつ、この折り曲
げ部の先端をタブ端子に突き当てた状態で、上記折り曲
げ部と曲げしろ部との重ね合わせ部を溶接すると共に、
折り曲げ部の先端とタブ端子との突き当て部を溶接した
ことを特徴とするバスバーのレーザ溶接構造を提供する
ものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a laser welding structure for a bus bar housed in an electric junction box, wherein a part of a bus bar pattern portion is cut and raised upward. A bent portion formed by bending into an inverted L-shape is formed, and a bent portion of the L-shaped tab terminal is overlapped on the lower surface of the bent portion, and the tip of the bent portion is abutted on the tab terminal. With the folded part and the overlapped part of the bent part and the bent margin part welded together,
An object of the present invention is to provide a laser welding structure for a bus bar, wherein a butted portion between a tip of a bent portion and a tab terminal is welded.
【００１１】本発明によれば、バスバーのパターン部の
折り曲げ部の下面に、別体のタブ端子の曲げしろ部を重
ね合わせて、折り曲げ部の先端をタブ端子に突き当て
る。この状態で折り曲げ部と曲げしろ部との重ね合わせ
部を溶接し、折り曲げ部の先端とタブ端子との突き当て
部を溶接することにより、タブ端子は、重ね合わせ部と
突き当て部の２個所でバスバーにスポット溶接されるこ
とになる。According to the present invention, the bent portion of the separate tab terminal is overlapped with the lower surface of the bent portion of the bus bar pattern portion, and the tip of the bent portion is abutted on the tab terminal. In this state, the overlapped portion of the bent portion and the bent margin portion is welded, and the end of the bent portion and the butted portion of the tab terminal are welded, so that the tab terminal is formed at the two portions of the overlapped portion and the butted portion. And spot welding to the bus bar.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して詳細に説明する。なお、従来技術と同一構成
・作用の箇所は同一番号を付して詳細な説明は省略す
る。Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the same components and operations as those of the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.
【００１３】図２に示すように、従来のようにバスバー
のパターン部からタブ端子を上下方向にそれぞれ切り起
こすのではなく、Ｌ字状のタブ端子１７ａを別体とし
て、タブ端子１７ａの下端に曲げしろ部１７ｂを一体形
成する。As shown in FIG. 2, the tab terminals are not cut and raised in the vertical direction from the bus bar pattern portion as in the prior art. Instead, an L-shaped tab terminal 17a is separately provided at the lower end of the tab terminal 17a. The bending margin 17b is integrally formed.
【００１４】また、バスバー１７のパターン部の一部に
は、上方に切り起こして逆Ｌ字状に折り曲げてなる折り
曲げ部１７ｃを形成する。この折り曲げ部１７ｃの長さ
Ｌはタブ端子１７ａの曲げしろ部１７ｂの長さとほぼ一
致させ、高さＴは、タブ端子１７ａの曲げしろ部１７ｂ
の厚みとほぼ一致させる。A bent portion 17c is formed in a part of the pattern portion of the bus bar 17 by being cut and raised upward and bent in an inverted L-shape. The length L of the bent portion 17c is substantially equal to the length of the bent portion 17b of the tab terminal 17a, and the height T is the length of the bent portion 17b of the tab terminal 17a.
Approximately the thickness of
【００１５】そして、図１に示すように、バスバー１７
のパターン部の折り曲げ部１７ｃの下面に、タブ端子１
７ａの曲げしろ部１７ｂを下方から重ね合わせると共
に、この折り曲げ部１７ｃの先端１７ｄをタブ端子１７
ａに突き当てる。Then, as shown in FIG.
The tab terminal 1 is provided on the lower surface of the bent portion 17c of the pattern portion.
7a is overlapped from below, and the tip 17d of the bent portion 17c is connected to the tab terminal 17a.
hit a.
【００１６】この状態で、図３に示すように、バスバー
１７のパターン部の折り曲げ部１７ｃとタブ端子１７ａ
の曲げしろ部１７ｂとの重ね合わせ部を真上からレーザ
ービームＬＢでレーザー溶接ａすると共に、折り曲げ部
１７ｃの先端１７ｄとタブ端子１７ａとの突き当て部を
斜め上方からレーザービームＬＢでレーザー溶接ａす
る。In this state, as shown in FIG. 3, the bent portion 17c of the pattern portion of the bus bar 17 and the tab terminal 17a
The laser beam LB is used for laser welding a laser beam LB from directly above the overlapped portion with the bending margin portion 17b, and the laser welding LB is performed for the abutting portion between the tip 17d of the bent portion 17c and the tab terminal 17a with the laser beam LB obliquely from above. I do.
【００１７】上記のように、バスバー１７のパターン部
の折り曲げ部１７ｃの下面に、別体のタブ端子１７ａの
曲げしろ部１７ｂを重ね合わせて、折り曲げ部１７ｃの
先端１７ｄをタブ端子１７ａに突き当てた状態で、折り
曲げ部１７ｃと曲げしろ部１７ｂとの重ね合わせ部を溶
接ａし、折り曲げ部１７ｃの先端１７ｄとタブ端子１７
ａとの突き当て部を溶接ａすることにより、タブ端子１
７ａは、重ね合わせ部と突き当て部の２個所でバスバー
１７にスポット溶接ａされることになるから、剪断（剥
離）強度と溶接のポイント数との関係を示す図４のグラ
フからも明らかなように、スポット溶接ａの強度が安定
しないときでも、剪断（剥離）方向の強度が充分に保証
できるようになる。As described above, the margin 17b of the separate tab terminal 17a is superimposed on the lower surface of the bent portion 17c of the pattern portion of the bus bar 17, and the tip 17d of the bent portion 17c abuts on the tab terminal 17a. In the folded state, the overlapped portion of the bent portion 17c and the bent portion 17b is welded by a, and the tip 17d of the bent portion 17c and the tab terminal 17 are welded.
The tab terminal 1 is welded by welding the abutting portion with the a.
7a is spot-welded to the bus bar 17 at two locations, the overlapped portion and the abutting portion, so that it is clear from the graph of FIG. 4 showing the relationship between the shear (peeling) strength and the number of welding points. As described above, even when the strength of the spot welding a is not stable, the strength in the shearing (peeling) direction can be sufficiently ensured.
【００１８】また、溶接時には、バスバー１７のパター
ン部の折り曲げ部１７ｃと絶縁板との間に、タブ端子１
７ａの曲げしろ部１７ｂを挟み込んで保持できるから、
折り曲げ部１７ｃと曲げしろ部１７ｂとの重ね合わせ部
の寸法が回路設計上の制約から加工精度限界まで小さく
なったとしても、タブ端子１７ａを治具等で固定するこ
となく、溶接が簡単に行なえる。At the time of welding, the tab terminal 1 is placed between the bent portion 17c of the pattern portion of the bus bar 17 and the insulating plate.
Since the bending margin 17b of 7a can be sandwiched and held,
Even if the size of the overlapped portion of the bent portion 17c and the bent margin portion 17b is reduced to the limit of processing accuracy due to circuit design restrictions, welding can be easily performed without fixing the tab terminal 17a with a jig or the like. You.
【００１９】上記バスバー１７を溶接する場合、レーザ
ー溶接の他、抵抗溶接、アーク溶接超音波溶接等も使用
することが可能であるが、レーザー溶接の場合では、上
述した抵抗溶接、アーク溶接、超音波溶接等と比較し
て、レーザービームＬＢは非接触であるため簡単な治具
のみで確実にバスバー１７を溶接できると共に、１個所
当たりの溶接秒数が短時間であるため量産性が良好であ
り、また、レーザービームＬＢはビーム径が細いためバ
スバー１７とタブ端子１７ａとを狭ピッチ化できて設計
の配線自由度が向上するという利点が有る。When welding the bus bar 17, in addition to laser welding, resistance welding, arc welding, ultrasonic welding, etc. can be used. In the case of laser welding, the above-described resistance welding, arc welding, Compared with sonic welding and the like, the laser beam LB is non-contact, so that the bus bar 17 can be reliably welded with only a simple jig, and the mass production is good because the welding time per spot is short. In addition, since the laser beam LB has a small beam diameter, there is an advantage that the pitch between the bus bar 17 and the tab terminal 17a can be narrowed and the degree of freedom in designing wiring is improved.
【００２０】また、各種のレーザー溶接の内、ＹＡＧレ
ーザー溶接は、非接触であること、熱影響層が少ないこ
と、消費電力が少なく装置が小型であること、光ファイ
バーが使えるために３次元溶接に容易に使えること、ビ
ームを多分割して多点同時溶接が可能であり、したがっ
て、自動化が容易であるために生産コスト低減が著しい
等の理由から最適である。[0020] Of the various types of laser welding, YAG laser welding is three-dimensional welding because it is non-contact, has a small heat-affected layer, consumes little power and is compact, and can use optical fibers. It is optimal because it can be used easily, and the beam can be divided into multiple parts to perform simultaneous welding at multiple points. Therefore, the automation is easy and the production cost is significantly reduced.
【００２１】なお、上記実施形態では、バスバー１７に
タブ端子１７ａを溶接する場合を説明したが、本発明に
係る溶接構造は、バスバーの異層間接続やバスバーのジ
ャンバー接続にも適用できることは言うまでもない。In the above embodiment, the case where the tab terminal 17a is welded to the bus bar 17 has been described. However, it is needless to say that the welding structure according to the present invention can also be applied to the connection between different layers of the bus bar and the connection of the bus bar to the jumper. .
【００２２】[0022]
【発明の効果】以上の説明からも明らかなように、本発
明のバスバーのレーザ溶接構造は、バスバーのパターン
部の折り曲げ部の下面に、別体のタブ端子の曲げしろ部
を重ね合わせて、折り曲げ部の先端をタブ端子に突き当
て、この状態で折り曲げ部と曲げしろ部との重ね合わせ
部を溶接し、折り曲げ部の先端とタブ端子との突き当て
部を溶接するようにしたから、タブ端子は、重ね合わせ
部と突き当て部の２個所でバスバーにスポット溶接され
ることになるので、スポット溶接の強度が安定しないと
きでも、剪断（剥離）方向の強度が充分に保証できるよ
うになる。また、溶接時には、バスバーのパターン部の
折り曲げ部と絶縁板との間に、別体のタブ端子の曲げし
ろ部を挟み込んで保持できるから、折り曲げ部と曲げし
ろ部との重ね合わせ部の寸法が回路設計上の制約から加
工精度限界まで小さくなったとしても、別体のタブ端子
を治具等で固定することなく、溶接が簡単に行なえるよ
うになる。As is clear from the above description, the laser welding structure of the bus bar according to the present invention is constructed by superposing the bent portion of the tab terminal separately on the lower surface of the bent portion of the pattern portion of the bus bar. Since the tip of the bent portion is abutted against the tab terminal, and the overlapped portion of the bent portion and the bent portion is welded in this state, and the abutting portion between the tip of the bent portion and the tab terminal is welded, Since the terminal is spot-welded to the bus bar at two places, the overlapping portion and the abutting portion, even when the strength of the spot welding is not stable, the strength in the shearing (peeling) direction can be sufficiently ensured. . Also, at the time of welding, it is possible to insert and hold a separate tab terminal bending portion between the bent portion of the bus bar pattern portion and the insulating plate, so that the dimension of the overlapping portion between the bent portion and the bending portion is reduced. Even if the processing accuracy is reduced to the limit of processing accuracy due to circuit design restrictions, welding can be easily performed without fixing a separate tab terminal with a jig or the like.
【図１】 本発明のレーザー溶接構造の斜視図である。FIG. 1 is a perspective view of a laser welding structure of the present invention.
【図２】 バスバーにタブ端子をレーザー溶接する前の
分解斜視図である。FIG. 2 is an exploded perspective view before a tab terminal is laser-welded to a bus bar.
【図３】 レーザ溶接構造であり、（ａ）は側面図、
（ｂ）平面図である。FIG. 3 is a laser welding structure, (a) is a side view,
(B) It is a top view.
【図４】 剪断（剥離）強度と溶接ポイント数との関係
を示すグラフである。FIG. 4 is a graph showing a relationship between shear (peeling) strength and the number of welding points.
【図５】 従来のレーザー溶接構造であり、（ａ）は斜
視図、（ｂ）は側面断面図である。FIG. 5 is a conventional laser welding structure, in which (a) is a perspective view and (b) is a side sectional view.
【図６】 従来のバスバーの斜視図である。FIG. 6 is a perspective view of a conventional bus bar.
【図７】 従来のバスバーの加工及び組み立て要領の分
解斜視図である。FIG. 7 is an exploded perspective view of a conventional bus bar processing and assembling procedure.
【図８】 （ａ）（ｂ）は、従来の圧着端子等のレーザ
溶接構造の斜視図である。8A and 8B are perspective views of a conventional laser welding structure for a crimp terminal or the like.
１７ バスバー １７ａ タブ端子 １７ｂ 曲げしろ部 １７ｃ 折り曲げ部 １７ｄ 先端 ＬＢ レーザビーム ａ 溶接 17 Bus bar 17a Tab terminal 17b Bending portion 17c Bending portion 17d Tip LB Laser beam a Welding
フロントページの続き (56)参考文献 特開 平５−174940（ＪＰ，Ａ) 実開 平６−17327（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01R 4/02 B23K 26/00 Continuation of the front page (56) References JP-A-5-174940 (JP, A) JP-A-6-17327 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H01R 4 / 02 B23K 26/00
Claims (1)
溶接構造であって、バスバーのパターン部の一部に、上
方に切り起こして逆Ｌ字状に折り曲げてなる折り曲げ部
を形成し、この折り曲げ部の下面に、Ｌ字状に形成した
タブ端子の曲げしろ部を重ね合わせ、かつ、この折り曲
げ部の先端をタブ端子に突き当てた状態で、上記折り曲
げ部と曲げしろ部との重ね合わせ部を溶接すると共に、
折り曲げ部の先端とタブ端子との突き当て部を溶接した
ことを特徴とするバスバーのレーザ溶接構造。1. A laser welding structure for a bus bar housed in an electrical junction box, wherein a bent portion formed by cutting and raising upward and bending in an inverted L-shape is formed in a part of a pattern portion of the bus bar. The L-shaped tab terminal bending margin is overlapped on the lower surface of the part, and the bent part and the bending margin are overlapped with the tip of the bent part abutting the tab terminal. While welding
A laser welding structure for a bus bar, characterized in that an end of a bent portion and a contact portion of a tab terminal are welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04970098A JP3325221B2 (en) | 1998-03-02 | 1998-03-02 | Laser welding structure of bus bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04970098A JP3325221B2 (en) | 1998-03-02 | 1998-03-02 | Laser welding structure of bus bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11250945A JPH11250945A (en) | 1999-09-17 |
| JP3325221B2 true JP3325221B2 (en) | 2002-09-17 |
Family
ID=12838469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04970098A Expired - Fee Related JP3325221B2 (en) | 1998-03-02 | 1998-03-02 | Laser welding structure of bus bar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3325221B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5524553B2 (en) * | 2009-09-24 | 2014-06-18 | 矢崎総業株式会社 | Welding structure to bus bar and welding method to bus bar |
| CN104094470B (en) * | 2012-08-07 | 2015-10-21 | 古河电气工业株式会社 | The manufacture method of crimp type terminal, connecting structure body, connector, wire harness and crimp type terminal, the manufacture method of connecting structure body |
-
1998
- 1998-03-02 JP JP04970098A patent/JP3325221B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11250945A (en) | 1999-09-17 |
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