JPH0866783A - Butt welding method using high energy beam - Google Patents
Butt welding method using high energy beamInfo
- Publication number
- JPH0866783A JPH0866783A JP6205195A JP20519594A JPH0866783A JP H0866783 A JPH0866783 A JP H0866783A JP 6205195 A JP6205195 A JP 6205195A JP 20519594 A JP20519594 A JP 20519594A JP H0866783 A JPH0866783 A JP H0866783A
- Authority
- JP
- Japan
- Prior art keywords
- gap
- members
- energy beam
- high energy
- welding method
- 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.)
- Granted
Links
Landscapes
- Laser Beam Processing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は突合せ溶接方法の改良技
術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved technique for a butt welding method.
【０００２】[0002]
【従来の技術】アルミニウム合金は反射率が高く、熱伝
導率が良いために溶接は容易でなく、溶接部にエネルギ
ーを集中する必要があり、この場合にレーザビームで代
表される高エネルギービーム溶接が好適である。2. Description of the Related Art Aluminum alloys have high reflectance and good thermal conductivity, so welding is not easy and it is necessary to concentrate energy on the welded portion. In this case, high energy beam welding represented by a laser beam is used. Is preferred.
【０００３】ところでレーザビーム等の高エネルギービ
ームは極めて細く絞られているために、部材の端部間ギ
ャップを厳密に管理する必要がある。ギャップが大き過
ぎるとレーザビームがギャップを通過していしまい溶融
が起こらない恐れがあるからである。そこで、特開昭
６０−１０８１８９号公報「突合せレーザ溶接方法」が
提案されている。この溶接方法は、２つの部材の位置決
め工程と、ギャップを計測してギャップが一定値以上大
きければ不合格とする選別工程と、合格品のみを溶接す
るレーザ溶接工程とからなる。By the way, since a high energy beam such as a laser beam is narrowed down extremely, it is necessary to strictly control the gap between the end portions of the member. This is because if the gap is too large, the laser beam may pass through the gap and melting may not occur. Therefore, Japanese Laid-Open Patent Publication No. 60-108189, “Butt Laser Welding Method” has been proposed. This welding method includes a positioning process of two members, a screening process of measuring a gap and rejecting it if the gap is larger than a certain value, and a laser welding process of welding only acceptable products.
【０００４】また、ギャップをある程度拡大できる技術
として、特公昭６３−５５３９７号公報「金属ストリ
ップのレーザビームによる突き合わせ溶接時のフィラー
ワイヤの供給方法」が提案されている。この方法は、ス
トリップの突き合わせ間隔（ギャップ）をフィラーワイ
ヤの直径より小さくし、前記突き合わせ部の端面によっ
てフィラーワイヤ端部をガイドさせ、しかもフィラーワ
イヤを溶接方向と逆の方向から供給すると言うものであ
り、フィラーワイヤの巻きぐせの影響を無くせ、ギャッ
プとフィラーワイヤとの関係が適当であるために母材へ
の十分な溶け込みが得られると説明されている。Further, as a technique for expanding the gap to some extent, Japanese Patent Publication No. 63-55397, "Method of supplying filler wire at butt welding of metal strip with laser beam" has been proposed. In this method, the butt spacing (gap) of the strip is made smaller than the diameter of the filler wire, the end of the butt portion guides the end of the filler wire, and the filler wire is fed from the opposite direction to the welding direction. It is described that the influence of the winding of the filler wire can be eliminated, and sufficient penetration into the base material can be obtained because of the appropriate relationship between the gap and the filler wire.
【０００５】[0005]
【発明が解決しようとする課題】上記によれば、ギャ
ップの管理は極めて重要である。しかし、母材（部材）
が１〜２ｍｍ程度であればギャップは０．２〜０．４ｍ
ｍとなり、計測は難しい。従って、２つの部材の位置決
め機構やギャップ計測機構は高価なものとなり、また、
選別工程で不合格品がでれば歩留りは悪くなり、生産性
も低下する。即ち、上記は高価な設備が必要であるこ
とと歩留りが低下するという２つの問題がある。According to the above, the management of the gap is extremely important. However, the base material (member)
Is about 1 to 2 mm, the gap is 0.2 to 0.4 m
m is difficult to measure. Therefore, the positioning mechanism for the two members and the gap measuring mechanism are expensive, and
If rejected products are produced in the sorting process, the yield will be poor and the productivity will be reduced. That is, the above problems have two problems that expensive equipment is required and the yield is reduced.
【０００６】また、上記のフィラーワイヤを採用する
と、ギャップの管理は楽になるが、反面、フィラーワイ
ヤ供給設備が必要となる。そこで、本発明の目的はギャ
ップ管理が容易で、しかもフィラーワイヤを必要としな
い溶接法を提供することにある。Further, when the above-mentioned filler wire is adopted, management of the gap becomes easy, but on the other hand, a filler wire supply facility is required. Therefore, an object of the present invention is to provide a welding method in which gap management is easy and a filler wire is not required.
【０００７】[0007]
【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、２つの部材を突合せ溶接するに際し、一方
の部材の端部に、他方の部材の端部に重なるオーバラッ
プ部を形成しておき、このオーバラップ部を他方の部材
の端部に重ねつつ両部材の端部を突き合せ、高エネルギ
ービームで先ずオーバラップ部を溶かし、引続いて両部
材の端部を溶接することを特徴とする。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention forms an overlap portion at the end of one member at the end of one member when butt welding two members. Then, while overlapping this overlap with the end of the other member, butt the ends of both members, melt the overlap first with a high-energy beam, and then weld the ends of both members. Is characterized by.
【０００８】前記オーバラップ部は次の式によって規定
することが望ましい。 Ｈ・Ｗ0≧１．２・Ｇ・ｔ Ｈ：オーバラップ部の高さ Ｗ0：オーバラップ部の幅 Ｇ：ギャップ（突合せ部の隙間） ｔ：部材の厚さIt is desirable that the overlap portion be defined by the following equation. H · W 0 ≧ 1.2 · G · t H: Overlap portion height W 0 : Overlap portion width G: Gap (abutment portion gap) t: Member thickness
【０００９】前記２つの部材はアルミニウム合金であ
り、前記オーバラップ部を有する方の部材は３〜３０重
量％の珪素（Ｓｉ）を含むことを特徴とする。The two members are aluminum alloys, and the member having the overlapping portion contains 3 to 30% by weight of silicon (Si).
【００１０】[0010]
【作用】ギャップがある程度大きくても、オーバラップ
部を先に溶かすことにより、吹き抜けを防止できる。Even if the gap is large to some extent, the blow-through can be prevented by melting the overlap portion first.
【００１１】オーバラップ部の断面がギャップの空間断
面の少なくとも１．２倍あれば吹き抜け及びアンダカッ
トを防止できる。If the cross section of the overlap portion is at least 1.2 times the space cross section of the gap, blow-through and undercut can be prevented.
【００１２】アルミニウム合金同士の溶接の場合、上方
の部材に３重量％以上の珪素を含めると溶接割れを防止
できる。珪素の割合が３０重量％を超えると溶融金属中
の初晶Ｓｉが増加して強度が低下するため好ましくな
い。In the case of welding aluminum alloys to each other, welding cracks can be prevented by including 3% by weight or more of silicon in the upper member. When the proportion of silicon exceeds 30% by weight, the primary crystal Si in the molten metal increases and the strength decreases, which is not preferable.
【００１３】[0013]
【実施例】本発明の実施例を添付図に基づいて以下に説
明する。なお、図面は符号の向きに見るものとする。図
１は本発明に係る２つの部材の拡大断面図であり、一方
の部材１の端部には高さＨ、幅Ｗ0のオーバラップ部２
が一体形成されている。部材１はアルミニウム合金であ
り、例えばダイカスト鋳造アルミニウム合金である。鋳
造品であれば前記オーバラップ部２は簡単に形成でき
る。他方の部材３は端面が単にカットされただけのアル
ミニウム合金薄板である。本実施例では、部材１，３の
板厚ｔは２．０ｍｍであり、オーバラップ部２の幅Ｗ0
は１．５ｍｍ、高さＨが１．２ｍｍである。Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is an enlarged cross-sectional view of two members according to the present invention, where an end portion of one member 1 has an overlapping portion 2 having a height H and a width W 0.
Are integrally formed. The member 1 is an aluminum alloy, for example, a die cast aluminum alloy. If it is a cast product, the overlap portion 2 can be easily formed. The other member 3 is an aluminum alloy thin plate whose end face is simply cut. In this embodiment, the plate thickness t of the members 1 and 3 is 2.0 mm, and the width W 0 of the overlapping part 2 is 0.
Is 1.5 mm and the height H is 1.2 mm.
【００１４】図２（ａ）〜（ｃ）は本発明の係る溶接法
の説明図である。（ａ）に示す通り、部材１，３を突合
せる。この際、ギャップＧは０．６ｍｍ以下とする。
０．６ｍｍを超えるとビームが突き抜けてしまい安定し
たビードが形成できないからである。（ｂ）に示す通
り、高エネルギービーム４をオーバラップ部２を介して
ギャップＧに臨ませ、下向きに照射する。すると、先ず
オーバラップ部２が溶ける。なお、高エネルギービーム
４は３．５ｋＷ出力のレーザビームであり、溶接速度は
４ｍ／ｍｉｎである。そして（ｃ）に示す通りに好まし
いビードが形成できる。2 (a) to 2 (c) are explanatory views of the welding method according to the present invention. As shown in (a), the members 1 and 3 are butted. At this time, the gap G is set to 0.6 mm or less.
This is because if it exceeds 0.6 mm, the beam penetrates and a stable bead cannot be formed. As shown in (b), the high-energy beam 4 is made to face the gap G through the overlap part 2 and is irradiated downward. Then, first, the overlap portion 2 melts. The high energy beam 4 is a laser beam having a power of 3.5 kW, and the welding speed is 4 m / min. Then, as shown in (c), preferable beads can be formed.
【００１５】次にオーバラップ部とギャップとの関係を
定量的に説明する。種々の実験の結果、オーバラップ部
の断面積は、ギャップの空間断面積の少くとも１．２倍
は必要であることが分かった。これ以下では吹き抜けや
アンダカットが発生するからである。即ち、図２（ａ）
に示す通りにギャップをＧ、部材の厚さをｔ、オーバラ
ップ部の高さをＨ、幅をＷ0とすると、次の経験式
（１）が成立する。Next, the relationship between the overlapping portion and the gap will be quantitatively described. As a result of various experiments, it has been found that the cross-sectional area of the overlap portion needs to be at least 1.2 times the space cross-sectional area of the gap. This is because blowouts and undercuts occur below this. That is, FIG. 2 (a)
When the gap is G, the thickness of the member is t, the height of the overlapping portion is H, and the width is W 0 as shown in (1), the following empirical formula (1) is established.
【００１６】 （Ｈ・Ｗ0）／（Ｇ・ｔ）≧１．２……（１） Ｈ：オーバラップ部の高さ Ｗ0：オーバラップ部の幅 Ｇ：ギャップ（突合せ部の隙間） ｔ：部材の厚さ(H · W 0 ) / (G · t) ≧ 1.2 (1) H: Height of overlap portion W 0 : Width of overlap portion G: Gap (gap between butting portions) t : Member thickness
【００１７】式（１）を変形すると、 Ｈ・Ｗ0≧１．２・Ｇ・ｔ……（２） となり、またＷ0は、図２（ｃ）に示す通りはビードの
幅Ｗ1を超えない範囲とする必要がある。即ち、 Ｗ0≦Ｗ1……（３） 式（２）を変形して式（４）を得る。 Ｇ≦（Ｈ・Ｗ0）／（１．２・ｔ）……（４） 式（２）及び式（３）から適当なオーバラップ部２の形
状が規定できる。また、式（３）及び式（４）からギャ
ップＧの最大許容値が規定できる。When the equation (1) is modified, H · W 0 ≧ 1.2 · G · t (2), and W 0 is the bead width W 1 as shown in FIG. 2 (c). It must be within the range. That is, W 0 ≦ W 1 (3) Equation (2) is modified to obtain Equation (4). G ≦ (H · W 0 ) / (1.2 · t) (4) From equations (2) and (3), an appropriate shape of the overlapping portion 2 can be defined. Further, the maximum allowable value of the gap G can be defined from the equations (3) and (4).
【００１８】今仮に、Ｈ＝１ｍｍ、Ｗ0＝１．５ｍｍ、
ｔ＝２．０ｍｍとすれば、Ｇ＝０．６２５ｍｍとなり、
ギャップＧは０．６ｍｍ程度に留める必要があることが
分かる。Now, suppose that H = 1 mm, W 0 = 1.5 mm,
If t = 2.0 mm, G = 0.625 mm,
It can be seen that the gap G needs to be kept to about 0.6 mm.
【００１９】ギャップＧの許容値を０．６ｍｍとすれば
これは部材の厚さ（２ｍｍ）の３０％に当り、容易に管
理できる値である。If the allowable value of the gap G is 0.6 mm, this is 30% of the thickness (2 mm) of the member, which is a value that can be easily controlled.
【００２０】尚、高エネルギービームは当面レーザビー
ムが対象となるが、これに限るものではなく例えば電子
ビーム、その他の将来開発される高密度ビームも対象と
なる。The high-energy beam is targeted at the laser beam for the time being, but is not limited to this and may be targeted at, for example, an electron beam and other high-density beams developed in the future.
【００２１】[0021]
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１は、２つの部材を突合せ溶接するに際
し、一方の部材の端部に、他方の部材の端部に重なるオ
ーバラップ部を形成しておき、このオーバラップ部を他
方の部材の端部に重ねつつ両部材の端部を突き合せ、高
エネルギービームで先ずオーバラップ部を溶かし、引続
いて両部材の端部を溶接することを特徴とし、ギャップ
がある程度大きくても、オーバラップ部を先に溶かすこ
とにより、吹き抜けを防止できるので、ギャップの管理
が極めて容易になり、作業能率が向上する。また、フィ
ラーワイヤを必要としないのでコストダウンが図れる。The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, when two members are butt-welded, an overlap portion that overlaps an end portion of another member is formed at an end portion of one member, and the overlap portion is formed at an end portion of the other member. The end portions of both members are butted against each other while being overlapped with each other, the overlap portion is first melted with a high-energy beam, and the end portions of both members are subsequently welded. By melting first, blow-through can be prevented, so the management of the gap becomes extremely easy, and the work efficiency is improved. Further, since no filler wire is required, the cost can be reduced.
【００２２】請求項２はオーバラップ部の断面がギャッ
プの空間断面の少なくとも１．２倍とするように規定し
たので、オーバラップ部の寸法決定が容易となり、作業
性が向上する。Since the cross section of the overlap portion is at least 1.2 times the space cross section of the gap, the dimension of the overlap portion can be easily determined and the workability is improved.
【００２３】請求項３は２つの部材をアルミニウム合金
とし、オーバラップ部を有する方の部材に３〜３０重量
％の珪素（Ｓｉ）を含めたので、溶接割れのない好まし
い溶接構造物が得られる。According to the third aspect of the present invention, the two members are made of aluminum alloy, and the member having the overlapping portion contains 3 to 30% by weight of silicon (Si), so that a preferable welded structure free from weld cracks can be obtained. .
【図１】本発明に係る２つの部材の拡大断面図FIG. 1 is an enlarged sectional view of two members according to the present invention.
【図２】本発明の係る溶接法の説明図FIG. 2 is an explanatory view of a welding method according to the present invention.
１…一方の部材、２…オーバラップ部、３…他方の部
材、４…高エネルギービーム。1 ... One member, 2 ... Overlap part, 3 ... Other member, 4 ... High energy beam.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２３Ｋ 103:10 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B23K 103: 10
Claims (3)
方の部材の端部に、他方の部材の端部に重なるオーバラ
ップ部を形成しておき、このオーバラップ部を他方の部
材の端部に重ねつつ両部材の端部を突き合せ、高エネル
ギービームで先ずオーバラップ部を溶かし、引続いて両
部材の端部を溶接することを特徴とした高エネルギービ
ームを用いた突合せ溶接方法。1. When butt-welding two members, an overlap portion is formed at an end portion of one member so as to overlap an end portion of the other member, and the overlap portion is formed at an end portion of the other member. A butt welding method using a high energy beam, characterized in that the ends of both members are butted against each other while being overlapped with each other, the overlap portion is first melted with a high energy beam, and the ends of both members are subsequently welded.
定されることを特徴とした請求項１記載の高エネルギー
ビームを用いた突合せ溶接方法。 Ｈ・Ｗ0≧１．２・Ｇ・ｔ Ｈ：オーバラップ部の高さ Ｗ0：オーバラップ部の幅 Ｇ：ギャップ（突合せ部の隙間） ｔ：部材の厚さ2. The butt welding method using a high energy beam according to claim 1, wherein the overlap portion is defined by the following equation. H · W 0 ≧ 1.2 · G · t H: Overlap portion height W 0 : Overlap portion width G: Gap (abutment portion gap) t: Member thickness
り、前記オーバラップ部を有する方の部材は３〜３０重
量％の珪素（Ｓｉ）を含むことを特徴とした請求項１又
は請求項２記載の高エネルギービームを用いた突合せ溶
接方法。3. The method according to claim 1, wherein the two members are aluminum alloys, and the member having the overlapping portion contains 3 to 30% by weight of silicon (Si). Butt Welding Method Using High Energy Beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20519594A JP3267811B2 (en) | 1994-08-30 | 1994-08-30 | Butt welding method using high energy beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20519594A JP3267811B2 (en) | 1994-08-30 | 1994-08-30 | Butt welding method using high energy beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0866783A true JPH0866783A (en) | 1996-03-12 |
| JP3267811B2 JP3267811B2 (en) | 2002-03-25 |
Family
ID=16502984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20519594A Expired - Fee Related JP3267811B2 (en) | 1994-08-30 | 1994-08-30 | Butt welding method using high energy beam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3267811B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481030A (en) * | 2013-09-18 | 2014-01-01 | 深圳市大族激光科技股份有限公司 | Laser welding method for liquid-crystal panel frame |
| JP2017113796A (en) * | 2015-12-25 | 2017-06-29 | 三菱電機株式会社 | Welding method and can body manufacturing method |
| JP2018526529A (en) * | 2015-07-02 | 2018-09-13 | コンステリウム ヌフ−ブリザックＣｏｎｓｔｅｌｌｉｕｍ Ｎｅｕｆ−Ｂｒｉｓａｃｈ | Laser welding method of monolithic semi-finished product made of aluminum alloy without filler wire, corresponding structural component and tailored blank |
| US11020820B2 (en) | 2014-04-15 | 2021-06-01 | Panasonic Intellectual Property Management Co., Ltd. | Laser welding method |
-
1994
- 1994-08-30 JP JP20519594A patent/JP3267811B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481030A (en) * | 2013-09-18 | 2014-01-01 | 深圳市大族激光科技股份有限公司 | Laser welding method for liquid-crystal panel frame |
| US11020820B2 (en) | 2014-04-15 | 2021-06-01 | Panasonic Intellectual Property Management Co., Ltd. | Laser welding method |
| JP2018526529A (en) * | 2015-07-02 | 2018-09-13 | コンステリウム ヌフ−ブリザックＣｏｎｓｔｅｌｌｉｕｍ Ｎｅｕｆ−Ｂｒｉｓａｃｈ | Laser welding method of monolithic semi-finished product made of aluminum alloy without filler wire, corresponding structural component and tailored blank |
| JP2017113796A (en) * | 2015-12-25 | 2017-06-29 | 三菱電機株式会社 | Welding method and can body manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3267811B2 (en) | 2002-03-25 |
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