JP3267811B2 - Butt welding method using high energy beam - Google Patents
Butt welding method using high energy beamInfo
- Publication number
- JP3267811B2 JP3267811B2 JP20519594A JP20519594A JP3267811B2 JP 3267811 B2 JP3267811 B2 JP 3267811B2 JP 20519594 A JP20519594 A JP 20519594A JP 20519594 A JP20519594 A JP 20519594A JP 3267811 B2 JP3267811 B2 JP 3267811B2
- Authority
- JP
- Japan
- Prior art keywords
- gap
- members
- butt
- welding method
- overlap portion
- 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)
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 a high reflectivity and a good thermal conductivity, so welding is not easy, and it is necessary to concentrate energy on a welded portion. 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。Since a high-energy beam such as a laser beam is narrowed very narrowly, it is necessary to strictly control a gap between end portions of members. This is because if the gap is too large, the laser beam may pass through the gap and may not melt. Therefore, Japanese Patent Application Laid-Open No. Sho 60-108189 "Butting laser welding method" has been proposed. This welding method includes a positioning step of two members, a selection step of measuring the gap and rejecting the gap if the gap is larger than a certain value, and a laser welding step of welding only the 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。Japanese Patent Publication No. Sho 63-55397 entitled "Method of Supplying Filler Wire at Butt Welding of Metal Strip by Laser Beam" has been proposed as a technique capable of increasing the gap to some extent. In this method, the butt interval (gap) of the strip is made smaller than the diameter of the filler wire, the end of the filler wire is guided by the end face of the butt portion, and the filler wire is supplied in a direction opposite to the welding direction. In addition, it is described that the influence of the winding of the filler wire can be eliminated, and that a sufficient relationship between the gap and the filler wire can provide sufficient penetration into the base material.
【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 1-2 mm, the gap is 0.2-0.4 m
m, which is difficult to measure. Therefore, the positioning mechanism and the gap measuring mechanism of the two members are expensive, and
If a rejected product appears in the sorting process, the yield will be reduced and the productivity will be reduced. That is, the above has two problems that expensive equipment is required and 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。[0006] Adoption of the above filler wire makes it easier to manage the gap, but requires a filler wire supply facility. Therefore, an object of the present invention is to provide a welding method that can easily manage a gap and does not require a filler wire.
【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、高さ
がＨで他方の部材に向って延ばす幅がＷ0のオーバラッ
プ部を、前記一方の部材の上隅部から膨出形成し、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突合せ
溶接方法において、前記オーバラップ部は次の式によっ
て規定されることを特徴とする。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 The present invention in order to solve the above problems SUMMARY OF THE INVENTION may, upon butt welding two members, the height
Is H and the width extending toward the other member is
A bulging portion is formed by bulging from the upper corner of the one member, and the ends of both members are abutted while overlapping the overlapping portion with the end of the other member. dissolved, butt welding the ends of the two members subsequently
In the welding method, the overlap portion is expressed by the following equation.
Characterized in that it is defined Te. H · W0 ≧ 1.2 · G · t H: Height of overlap portion W0: Width of overlap portion G: Gap (gap at butt portion) t: Thickness of member
【０００８】[0008]
【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 made of an aluminum alloy, and the member having the overlap 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。[Effect] Even if the gap is large to a certain extent, blow-by 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. If the proportion of silicon exceeds 30% by weight, the amount of 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。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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, and an end portion of one member 1 has an overlap 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 overlap portion 2 is set.
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。FIGS. 2A to 2C are explanatory views of the welding method according to the present invention. The members 1 and 3 are butted as shown in FIG. At this time, the gap G is set to 0.6 mm or less.
If the thickness exceeds 0.6 mm, the beam penetrates and a stable bead cannot be formed. As shown in (b), the high-energy beam 4 faces the gap G via the overlap portion 2 and is irradiated downward. Then, the overlapping part 2 melts first. The high energy beam 4 is a 3.5 kW output laser beam, and the welding speed is 4 m / min. Then, a preferable bead can be formed as shown in FIG.
【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 overlap portion and the gap will be quantitatively described. As a result of various experiments, it was found that the cross-sectional area of the overlap portion was required to be at least 1.2 times the spatial cross-sectional area of the gap. This is because blow-through or undercut occurs below this value. That is, FIG.
Assuming that the gap is G, the thickness of the member is t, the height of the overlap portion is H, and the width is W 0 , the following empirical formula (1) holds.
【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 of abutting portion) t : Thickness of member
【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。By transforming equation (1), H.W 0 ≧ 1.2 · G · t (2), where W 0 is the width W 1 of the bead as shown in FIG. 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) An appropriate shape of the overlap portion 2 can be defined from Expressions (2) and (3). Further, the maximum allowable value of the gap G can be defined from Expressions (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。Suppose now that H = 1 mm, W 0 = 1.5 mm,
If t = 2.0 mm, G = 0.625 mm, and
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。Assuming that the allowable value of the gap G is 0.6 mm, this corresponds to 30% of the thickness (2 mm) of the member, and 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 a laser beam for the time being, but is not limited thereto. For example, an electron beam and other high-density beams to be developed in the future are also targeted.
【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、高さがＨで他方の部材に向って延ばす幅がＷ0のオ
ーバラップ部を、前記一方の部材の上隅部から膨出形成
し、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
る突合せ溶接方法において、前記オーバラップ部は次の
式によって規定されることを特徴とする。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 According to the present invention, the following effects are exhibited by the above configuration. In the first aspect, when the two members are butt-welded, the height is H and the width extending toward the other member is W0.
The wrap portion is bulged from the upper corner of the one member.
And, the overlapping section abutting the end of the lap while the two members to the end of the other member, first dissolved overlap portion with high energy beam butt welding method for welding the ends of the two members subsequently In the above, the overlapping portion is as follows:
It is characterized by being defined by an expression . H · W0 ≧ 1.2 · G · t H: Height of overlap portion W0: Width of overlap portion G: Gap (gap at butt portion) t: Thickness of member
【００２２】請求項１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。そして、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。 [0022] Since according to claim 1 is cross section of the overlapping section is defined to be at least 1.2 times the spatial cross-section of the gap, dimensioning of the overlapping portion is facilitated, the workability is improved. And the gap is large
Also, by melting the overlap part first,
Gaps, making gap management extremely easy.
Work efficiency is improved. Also requires filler wire
And cost reduction can be achieved.
【００２３】請求項２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。[0023] The second aspect of the two members is aluminum alloy, since including the overlapping section member 3 to 30 wt% of silicon towards having (Si), no preferred welded structure of weld cracking is 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 portion, 3 ... the other member, 4 ... high energy beam.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２３Ｋ 103:10 Ｂ２３Ｋ 103:10 (56)参考文献 特開 平７−266068（ＪＰ，Ａ) 特開 昭59−30492（ＪＰ，Ａ) 特開 昭64−18592（ＪＰ，Ａ) 特開 平４−228286（ＪＰ，Ａ) 実開 昭62−155980（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 26/00 B23K 31/00 B23K 33/00 C22C 21/02 B23K 103:10 Continuation of the front page (51) Int.Cl. 7 Identification symbol FI B23K 103: 10 B23K 103: 10 (56) References JP-A-7-266068 (JP, A) JP-A-59-30492 (JP, A) JP-A-64-18592 (JP, A) JP-A-4-228286 (JP, A) JP-A-62-155980 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B23K 26/00 B23K 31/00 B23K 33/00 C22C 21/02 B23K 103: 10
Claims (2)
さがＨで他方の部材に向って延ばす幅がＷ0のオーバラ
ップ部を、前記一方の部材の上隅部から膨出形成し、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突合
せ溶接方法において、前記オーバラップ部は次の式によ
って規定され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。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 (1) When butt-welding two members, a high
An overlayer whose width is W0 and whose width extends toward the other member is H
The overlapping portion is formed so as to protrude from the upper corner of the one member, and the overlapped portion is overlapped with the end of the other member while the ends of both members are butted together. It was dissolved, to weld the ends of the two members subsequently butt
In the overlap welding method, the overlap portion is expressed by the following equation.
Butt welding method using a high-energy beam, characterized in that defined me. H · W0 ≧ 1.2 · G · t H: Height of overlap portion W0: Width of overlap portion G: Gap (gap at butt portion) t: Thickness of member
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記
載の高エネルギービームを用いた突合せ溶接方法。Wherein said two members are aluminum alloy, members who have the overlap portion Claim 1 Symbol <br/> was characterized in that it comprises 3 to 30 wt% of silicon (Si) Butt welding method using the high energy beam described above.
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 JPH0866783A (en) | 1996-03-12 |
| JP3267811B2 true 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) |
Families Citing this family (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 |
| WO2015159514A1 (en) | 2014-04-15 | 2015-10-22 | パナソニックＩｐマネジメント株式会社 | Laser welding method |
| FR3038242B1 (en) * | 2015-07-02 | 2017-06-23 | Constellium Neuf-Brisach | ALUMINUM ALLOY FOR WIRELESS LASER WELDING |
| JP6544231B2 (en) * | 2015-12-25 | 2019-07-17 | 三菱電機株式会社 | Welding method and manufacturing method of can |
-
1994
- 1994-08-30 JP JP20519594A patent/JP3267811B2/en not_active Expired - Fee Related
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