JPH06285659A - Laser welding method - Google Patents
Laser welding methodInfo
- Publication number
- JPH06285659A JPH06285659A JP5080400A JP8040093A JPH06285659A JP H06285659 A JPH06285659 A JP H06285659A JP 5080400 A JP5080400 A JP 5080400A JP 8040093 A JP8040093 A JP 8040093A JP H06285659 A JPH06285659 A JP H06285659A
- Authority
- JP
- Japan
- Prior art keywords
- laser welding
- bent
- welded
- bent portion
- sealant
- 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.)
- Withdrawn
Links
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- Laser Beam Processing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は重ね合わせた２枚の金属
板の内、一方の金属板の端部を折り曲げ３枚重ねになっ
た折り曲げ部にレーザビームを照射して行うレーザ溶接
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser welding method in which an end of one metal plate of two superposed metal plates is bent to irradiate a laser beam on a bent portion of three metal plates. .
【０００２】[0002]
【従来の技術】従来、２枚の鋼板を溶接する際に、一方
の鋼板の端部を折り曲げ、その折り曲げた端部で他方の
鋼板の端部を覆って固定し、３枚重ねとなった部分の上
から２枚の鋼板を溶接する手法が、自動車産業などで多
く取られている。これをアフターヘム部の溶接という。2. Description of the Related Art Conventionally, when welding two steel plates, one end of the steel plate is bent, and the other end of the steel plate is covered with the bent end to be fixed to form three plates. The method of welding two steel plates from the top of a portion is often used in the automobile industry and the like. This is called after-hem welding.
【０００３】図６はアフターヘム部の溶接の説明図であ
り、（Ａ）はアフターヘム部の全体図を、（Ｂ）は
（Ａ）のＸ６−Ｘ６断面をそれぞれ示す。図において、
２枚の鋼板６１０及び６２０を溶接する際に、一方の鋼
板６１０の端部６１１を折り曲げ、その折り曲げた端部
６１１で他方の鋼板６２０の端部６２１を覆って固定
し、３枚重ねとなった部分の上から２枚の鋼板６１０及
び６２０を溶接する。この３枚重ねになった部分がアフ
ターヘム部１０１である。6A and 6B are explanatory views of welding of the afterhem portion. FIG. 6A is an overall view of the afterhem portion, and FIG. 6B is a cross section taken along line X6-X6 of FIG. In the figure,
When welding the two steel plates 610 and 620, the end 611 of one steel plate 610 is bent, and the bent end 611 covers and fixes the end 621 of the other steel plate 620 to form a three-ply stack. The two steel plates 610 and 620 are welded from above the opened portion. The portion where the three sheets are stacked is the after hem portion 101.
【０００４】ところで、アフターヘム部１０１の溶接箇
所６４の反対側の面６１３は、自動車の外面となること
が多く、その反対側の面６１３に溶接の熱影響が出るこ
とは嫌われている。しかし、アフターヘム部１０１への
溶接は、従来から入熱量が多い炭酸ガス溶接やスポット
溶接によってなされているため、その熱影響を完全に除
去するのは困難であった。By the way, the surface 613 of the after-hem portion 101 opposite to the welded portion 64 is often the outer surface of the automobile, and it is disliked that the opposite surface 613 is affected by the heat of welding. However, since welding to the after-hem portion 101 has been conventionally performed by carbon dioxide welding or spot welding, which has a large amount of heat input, it has been difficult to completely remove the heat effect.
【０００５】一方、レーザ溶接は入熱量が小さく、溶接
箇所４の反対側の面６１３に熱影響を残すことが少な
い。このため、アフターヘム部１０１の溶接にはレーザ
溶接の導入が検討されつつある。On the other hand, laser welding has a small amount of heat input and rarely leaves a heat effect on the surface 613 opposite to the welding spot 4. For this reason, introduction of laser welding is being considered for welding the after-hem portion 101.
【０００６】[0006]
【発明が解決しようとする課題】しかし、アフターヘム
部１０１の袋状になった部分には、図６（Ｂ）に示すよ
うに、鋼板６２０のコバ（端部６２１）の錆を防ぐた
め、シーラント（シール剤）６３が塗布される場合が多
い。このシーラント６３は、折り曲げ時にそのプレス圧
力によって溶接箇所６４まで回り込む場合があり、この
ような部分にレーザ溶接を行うとブローホールが起こり
やすくなり、シーラント６３は気化して矢印Ｃで示すよ
うに、溶接箇所６４から吹き出してしまう。これは溶接
時に鋼板６１０、６２０を溶融させる温度よりシーラン
ト６３が気化する温度が低く、またその蒸発圧力も高い
ために、その気化したシーラント６３が鋼板６１０、６
２０の溶融した部分を吹き飛ばしてしまうためである。
このため、アフターヘム部１０１にレーザ溶接を行って
も、良好な溶接を得ることができなかった。However, in the bag-shaped portion of the afterhem portion 101, as shown in FIG. 6B, in order to prevent the edge (end portion 621) of the steel plate 620 from rusting, A sealant (sealant) 63 is often applied. The sealant 63 may wrap around to the welded portion 64 due to the pressing pressure at the time of bending, and when laser welding is performed on such a portion, blowholes easily occur, and the sealant 63 vaporizes and, as shown by an arrow C, It blows out from the welding point 64. This is because the temperature at which the sealant 63 vaporizes is lower than the temperature at which the steel plates 610 and 620 are melted during welding, and the vaporization pressure thereof is also higher, so that the vaporized sealant 63 is at a higher temperature.
This is because the melted portion of 20 is blown off.
Therefore, even if the after-hem portion 101 is laser-welded, good welding cannot be obtained.
【０００７】本発明はこのような点に鑑みてなされたも
のであり、アフターヘム部に良好なレーザ溶接を行うこ
とができるレーザ溶接方法を提供することを目的とす
る。The present invention has been made in view of the above points, and an object thereof is to provide a laser welding method capable of performing favorable laser welding on an afterhem portion.
【０００８】[0008]
【課題を解決するための手段】本発明では上記課題を解
決するために、重ね合わせた２枚の金属板の内、一方の
金属板の端部を折り曲げて３枚重ねになった折り曲げ部
にレーザビームを照射して行うレーザ溶接方法におい
て、前記一方の金属板の折り曲げ部の幅を広くとり、前
記折り曲げ部の折り曲げ屈曲部分から前記折り曲げ部の
溶接箇所までの距離を長くしたことを特徴とするレーザ
溶接方法が、提供される。According to the present invention, in order to solve the above-mentioned problems, one of two metal plates that are superposed is bent to form a bent portion in which three metal plates are superposed. In the laser welding method performed by irradiating a laser beam, the width of the bent portion of the one metal plate is widened, and the distance from the bent portion of the bent portion to the welded portion of the bent portion is lengthened. A laser welding method is provided.
【０００９】[0009]
【作用】アフターヘム部を形成する際に、一方の金属板
の折り曲げ部の幅を広くとり、その折り曲げ部の折り曲
げ屈曲部分から折り曲げ部の溶接箇所までの距離を長く
したので、溶接箇所からシーラントまでの距離も長くな
り、袋状になった部分のシーラントが溶接箇所まで回り
込むのを防止することができる。このため、レーザ溶接
時のシーラント気化によるブローホールの発生を防止す
ることができる。また、レーザ溶接による入熱量は小さ
いので、溶接箇所の反対側の面に熱影響を及ぼすことも
ない。[Function] When forming the afterhem portion, the width of the bent portion of one metal plate is widened, and the distance from the bent portion of the bent portion to the welded portion of the bent portion is lengthened. It is possible to prevent the sealant in the bag-shaped part from wrapping around to the welded part. Therefore, it is possible to prevent the generation of blow holes due to vaporization of the sealant during laser welding. Further, since the heat input amount by the laser welding is small, the surface on the side opposite to the welded portion is not affected by heat.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１は本発明によるアフターヘム部へのレーザ
溶接を示す図であり、（Ａ）はアフターヘム部の平面図
を、（Ｂ）は（Ａ）のＸ−Ｘ断面をそれぞれ示す。図に
おいて、２枚の鋼板１及び２を溶接する際に、一方の鋼
板１の端部１１を折り曲げ、その折り曲げた端部１１で
他方の鋼板２の端部２１を覆って固定し、３枚重ねとな
ったアフターヘム部１００の上から２枚の鋼板１及び２
を溶接する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are views showing laser welding to an afterhem portion according to the present invention. FIG. 1A is a plan view of the afterhem portion, and FIG. 1B is a sectional view taken along line XX of FIG. In the figure, when welding two steel plates 1 and 2, one end 11 of one steel plate 1 is bent, the end 21 of the other steel plate 2 is covered and fixed by the bent end 11, and Two steel plates 1 and 2 from the top of the overlapped after hem 100
To weld.
【００１１】このアフターヘム部１００を形成する際
に、鋼板１の屈曲部分１２から端部１１までの幅を広く
とり、その屈曲部分１２から溶接箇所４までの距離も長
くした。このため、溶接箇所４からシーラント３までの
距離も長くなり、袋状になった部分のシーラント３が溶
接箇所４まで回り込むのを防止することができ、レーザ
溶接時のシーラント３の気化によるブローホールの発生
を防止することができる。また、レーザ溶接による入熱
量は小さいので、溶接箇所４の反対側の面１３に熱影響
を及ぼすこともない。したがって、アフターヘム部１０
０に良好なレーザ溶接を行うことができる。When forming the after-hem portion 100, the width from the bent portion 12 to the end portion 11 of the steel plate 1 was widened, and the distance from the bent portion 12 to the welded portion 4 was also lengthened. Therefore, the distance from the welded portion 4 to the sealant 3 also becomes long, and the bag-shaped sealant 3 can be prevented from wrapping around to the welded portion 4, and the blowhole due to vaporization of the sealant 3 during laser welding can be prevented. Can be prevented. Further, since the amount of heat input by laser welding is small, the surface 13 on the opposite side of the welded portion 4 is not affected by heat. Therefore, the after hem section 10
Good laser welding can be performed.
【００１２】図２は第２の実施例を示す図であり、
（Ａ）はアフターヘム部の平面図を、（Ｂ）は（Ａ）の
Ｘ１−Ｘ１断面をそれぞれ示す。この実施例では、アフ
ターヘム部１００ａを形成する際に、鋼板１ａ側で、鋼
板１ａの端部１１ａの溶接箇所４ａと屈曲部分１２ａと
の間に穴１４ａを設けている。このように、鋼板１ａの
溶接箇所４ａの近傍に穴１４ａを設けたので、シーラン
ト３ａが溶接箇所４ａに回り込んできても、そのシーラ
ント３ａは穴１４ａから排出され、レーザ溶接時にその
シーラント３ａが気化してもブローホールを引き起こす
ことはない。また、レーザ溶接による入熱量は小さいの
で、溶接箇所４ａの反対側の面１３ａに熱影響を及ぼす
こともなく、アフターヘム部１００ａに良好なレーザ溶
接を行うことができる。FIG. 2 is a diagram showing a second embodiment,
(A) is a plan view of the afterhem portion, and (B) is a cross section taken along line X1-X1 of (A). In this embodiment, when forming the after hem portion 100a, a hole 14a is provided on the steel plate 1a side between the welded portion 4a of the end portion 11a of the steel plate 1a and the bent portion 12a. Since the hole 14a is provided in the vicinity of the welded portion 4a of the steel plate 1a in this manner, even if the sealant 3a goes around the welded portion 4a, the sealant 3a is discharged from the hole 14a and the sealant 3a is laser-welded. Even if vaporized, it does not cause blowholes. Further, since the heat input amount by the laser welding is small, it is possible to perform favorable laser welding on the afterhem portion 100a without affecting the surface 13a on the opposite side of the welding portion 4a.
【００１３】図３は第３の実施例を示す図であり、
（Ａ）はアフターヘム部の平面図を、（Ｂ）は（Ａ）の
Ｘ２−Ｘ２断面をそれぞれ示す。この実施例では、アフ
ターヘム部１００ｂを形成する際に、鋼板１ｂを、鋼板
１ｂの端部１１ｂの溶接箇所４ｂと屈曲部分１２ｂとの
間で湾曲させて湾曲部分１４ｂを設け、その内側に空洞
部分１５ｂを設けている。このように、鋼板１ｂをその
溶接箇所４ｂの近傍で湾曲させてその内側に空洞部分１
５ｂを設けたので、シーラント３ｂが溶接箇所４ｂに回
り込んできても、そのシーラント３ｂは空洞部分１５ｂ
に溜まる。また、レーザ溶接時にそのシーラント３ｂが
気化しても空洞部分１５ｂがあるため、そのガス圧力は
吸収されブローホールを引き起こすには至らない。さら
に、レーザ溶接による入熱量は小さいので、溶接箇所４
ｂの反対側の面１３ｂに熱影響を及ぼすこともなく、ア
フターヘム部１００ｂに良好なレーザ溶接を行うことが
できる。FIG. 3 is a diagram showing a third embodiment,
(A) is a plan view of the afterhem portion, and (B) is a cross section taken along line X2-X2 of (A). In this embodiment, when the after-hem portion 100b is formed, the steel plate 1b is curved between the welded portion 4b of the end portion 11b of the steel plate 1b and the bent portion 12b to provide a curved portion 14b, and a cavity is formed inside thereof. A portion 15b is provided. Thus, the steel plate 1b is curved in the vicinity of the welded portion 4b and the hollow portion 1 is formed inside the curved portion.
Since the sealant 3b is provided, even if the sealant 3b wraps around the welding spot 4b, the sealant 3b still has a hollow portion 15b.
Accumulate in. Further, even if the sealant 3b is vaporized at the time of laser welding, since the hollow portion 15b exists, the gas pressure is not absorbed and does not cause a blow hole. Furthermore, since the heat input by laser welding is small, the welding point 4
Good laser welding can be performed on the after hem portion 100b without affecting the surface 13b on the opposite side of b from heat.
【００１４】図４は第４の実施例を示す図であり、
（Ａ）はアフターヘム部の平面図を、（Ｂ）は（Ａ）の
Ｘ３−Ｘ３断面をそれぞれ示す。この実施例では、アフ
ターヘム部１００ｃを形成する際に、３枚重ねの真ん中
に位置する鋼板２ｃ側で、溶接箇所４ｃと鋼板２ｃの端
部２１ｃとの間に穴２２ｃを設けている。このように、
鋼板２ｃの溶接箇所４ｃの近傍に穴２２ｃを設けたの
で、シーラント３ｃが溶接箇所４ｃに回り込んできて
も、そのシーラント３ｃは穴２２ｃに溜まり、レーザ溶
接時にそのシーラント３ｃが気化しても穴２２ｃがある
ため、そのガス圧力は吸収されブローホールを引き起こ
すには至らない。さらに、レーザ溶接による入熱量は小
さいので、溶接箇所４ｃの反対側の面１３ｃに熱影響を
及ぼすこともなく、アフターヘム部１００ｃに良好なレ
ーザ溶接を行うことができる。FIG. 4 is a diagram showing a fourth embodiment,
(A) is a plan view of an afterhem part, (B) shows the X3-X3 cross section of (A), respectively. In this embodiment, when the after-hem portion 100c is formed, the hole 22c is provided between the welded portion 4c and the end portion 21c of the steel plate 2c on the steel plate 2c side located in the middle of the three-layer stack. in this way,
Since the hole 22c is provided in the vicinity of the welded portion 4c of the steel plate 2c, even if the sealant 3c wraps around the welded portion 4c, the sealant 3c remains in the hole 22c, and even if the sealant 3c vaporizes during laser welding Since there is 22c, the gas pressure is not absorbed and does not cause blowholes. Further, since the amount of heat input by the laser welding is small, it is possible to perform favorable laser welding on the afterhem portion 100c without affecting the surface 13c on the opposite side of the welding portion 4c.
【００１５】図５は第５の実施例を示す図であり、
（Ａ）はアフターヘム部の平面図を、（Ｂ）は（Ａ）の
Ｘ４−Ｘ４断面をそれぞれ示す。この実施例では、アフ
ターヘム部１００ｄを形成する際に、３枚重ねの真ん中
に位置する鋼板２ｄ側において、溶接箇所４ｄの近傍で
屈曲部分１２ｄ側に切り欠き部分２２ｄを設けている。
このように、鋼板２ｄの溶接箇所４ｄの近傍に切り欠き
部分２２ｄを設けたので、シーラント３ｄが溶接箇所４
ｄに回り込んできても、そのシーラント３ｄは切り欠き
部分２２ｄに溜まり、レーザ溶接時にそのシーラント３
ｄが気化しても切り欠き部分２２ｄがあるため、そのガ
ス圧力は吸収されブローホールを引き起こすには至らな
い。さらに、レーザ溶接による入熱量は小さいので、溶
接箇所４ｄの反対側の面１３ｄに熱影響を及ぼすことも
なく、アフターヘム部１００ｄに良好なレーザ溶接を行
うことができる。FIG. 5 is a diagram showing a fifth embodiment,
(A) is a plan view of the afterhem portion, and (B) is a cross section taken along line X4-X4 of (A). In this embodiment, when forming the after hem portion 100d, a cutout portion 22d is provided on the bent portion 12d side near the welded portion 4d on the side of the steel sheet 2d located in the middle of the stack of three sheets.
Since the cutout portion 22d is provided in the vicinity of the welded portion 4d of the steel plate 2d in this manner, the sealant 3d is welded to the welded portion 4d.
Even if the sealant 3d goes around, the sealant 3d collects in the notch 22d, and the sealant 3d is laser-welded.
Even if d is vaporized, since the cutout portion 22d exists, the gas pressure is not absorbed and does not cause a blowhole. Further, since the amount of heat input by the laser welding is small, it is possible to perform good laser welding on the afterhem portion 100d without affecting the surface 13d on the opposite side of the welding spot 4d.
【００１６】[0016]
【発明の効果】以上説明したように本発明では、アフタ
ーヘム部を形成する際に、一方の金属板の折り曲げ部の
幅を広くとり、その折り曲げ部の折り曲げ屈曲部分から
折り曲げ部の溶接箇所までの距離を長くしたので、溶接
箇所からシーラントまでの距離も長くなり、袋状になっ
た部分のシーラントが溶接箇所まで回り込むのを防止す
ることができる。As described above, according to the present invention, when the afterhem portion is formed, the width of the bent portion of one metal plate is widened, and the bent portion of the bent portion to the welded portion of the bent portion. Since the distance is increased, the distance from the welded portion to the sealant is also increased, and the sealant in the bag-shaped portion can be prevented from wrapping around to the welded portion.
【００１７】このため、レーザ溶接時のシーラント気化
によるブローホールの発生を防止することができる。ま
た、レーザ溶接による入熱量は小さいので、溶接箇所の
反対側の面に熱影響を及ぼすこともない。Therefore, it is possible to prevent the generation of blow holes due to vaporization of the sealant during laser welding. Further, since the heat input amount by the laser welding is small, the surface on the side opposite to the welded portion is not affected by heat.
【００１８】したがって、アフターヘム部に良好なレー
ザ溶接を行うことができる。Therefore, good laser welding can be performed on the afterhem portion.
【図１】本発明によるアフターヘム部へのレーザ溶接を
示す図であり、（Ａ）はアフターヘム部の平面図を、
（Ｂ）は（Ａ）のＸ−Ｘ断面をそれぞれ示す。FIG. 1 is a diagram showing laser welding to an afterhem portion according to the present invention, (A) is a plan view of the afterhem portion,
(B) shows the XX cross section of (A), respectively.
【図２】第２の実施例を示す図であり、（Ａ）はアフタ
ーヘム部の平面図を、（Ｂ）は（Ａ）のＸ１−Ｘ１断面
をそれぞれ示す。FIG. 2 is a diagram showing a second embodiment, (A) is a plan view of an afterhem portion, and (B) is a cross section taken along line X1-X1 of (A).
【図３】第３の実施例を示す図であり、（Ａ）はアフタ
ーヘム部の平面図を、（Ｂ）は（Ａ）のＸ２−Ｘ２断面
をそれぞれ示す。3A and 3B are views showing a third embodiment, FIG. 3A is a plan view of an afterhem portion, and FIG. 3B is a sectional view taken along line X2-X2 of FIG. 3A.
【図４】第４の実施例を示す図であり、（Ａ）はアフタ
ーヘム部の平面図を、（Ｂ）は（Ａ）のＸ３−Ｘ３断面
をそれぞれ示す。FIG. 4 is a view showing a fourth embodiment, (A) is a plan view of an afterhem portion, and (B) is a cross section taken along line X3-X3 of (A).
【図５】第５の実施例を示す図であり、（Ａ）はアフタ
ーヘム部の平面図を、（Ｂ）は（Ａ）のＸ４−Ｘ４断面
をそれぞれ示す。FIG. 5 is a diagram showing a fifth embodiment, (A) is a plan view of an afterhem portion, and (B) is a cross section taken along line X4-X4 of (A).
【図６】アフターヘム部の溶接の説明図であり、（Ａ）
はアフターヘム部の全体図を、（Ｂ）は（Ａ）のＸ６−
Ｘ６断面をそれぞれ示す。FIG. 6 is an explanatory view of welding of an after hem part, (A)
Is an overall view of the afterhem part, (B) is X6-of (A)
Each X6 cross section is shown.
１，１ａ，１ｂ，１ｃ，１ｄ 鋼板 ２，２ａ，２ｂ，２ｃ，２ｄ 鋼板 ３，３ａ，３ｂ，３ｃ，３ｄ シーラント ４，４ａ，４ｂ，４ｃ，４ｄ 溶接箇所 １１，１１ａ，１１ｂ，１１ｃ，１１ｄ 端部 １２，１２ａ，１２ｂ，１２ｃ，１２ｄ 屈曲部分 １３，１３ａ，１３ｂ，１３ｃ，１３ｄ 溶接箇所の反
対側の面 １４ａ，２２ｃ 穴 １４ｂ 湾曲部分 １５ｂ 空洞部分 ２１，２１ｃ 端部 ２２ｄ 切り欠き部分 １００，１００ａ，１００ｂ，１００ｃ，１００ｄ ア
フターヘム部1, 1a, 1b, 1c, 1d Steel plate 2, 2a, 2b, 2c, 2d Steel plate 3, 3a, 3b, 3c, 3d Sealant 4, 4a, 4b, 4c, 4d Welding point 11, 11a, 11b, 11c, 11d Ends 12, 12a, 12b, 12c, 12d Bent parts 13, 13a, 13b, 13c, 13d Surfaces opposite to the welded parts 14a, 22c Holes 14b Curved parts 15b Cavity parts 21, 21c Ends 22d Notched parts 100, 100a, 100b, 100c, 100d After-hem part
Claims (5)
金属板の端部を折り曲げて３枚重ねになった折り曲げ部
にレーザビームを照射して行うレーザ溶接方法におい
て、 前記一方の金属板の折り曲げ部の幅を広くとり、前記折
り曲げ部の折り曲げ屈曲部分から前記折り曲げ部の溶接
箇所までの距離を長くしたことを特徴とするレーザ溶接
方法。1. A laser welding method in which an end portion of one metal plate of two metal plates that are stacked is bent to irradiate a laser beam to a bent part where three metal plates are stacked. A laser welding method, characterized in that a width of a bent portion of a metal plate is widened and a distance from a bent portion of the bent portion to a welding portion of the bent portion is lengthened.
金属板の端部を折り曲げて３枚重ねになった折り曲げ部
にレーザビームを照射して行うレーザ溶接方法におい
て、 前記一方の金属板側で、前記折り曲げ部の溶接箇所と前
記折り曲げ部の折り曲げ屈曲部分との間に穴を設けたこ
とを特徴とする請求項１記載のレーザ溶接方法。2. A laser welding method in which an end portion of one metal plate of two superposed metal plates is bent to irradiate a laser beam to a bent portion where three metal plates are superposed, The laser welding method according to claim 1, wherein a hole is provided between the welded portion of the bent portion and the bent portion of the bent portion on the metal plate side.
金属板の端部を折り曲げて３枚重ねになった折り曲げ部
にレーザビームを照射して行うレーザ溶接方法におい
て、 前記折り曲げ部の溶接箇所と前記折り曲げ部の折り曲げ
屈曲部分との間で、前記一方の金属板を湾曲させて空洞
部分を設けたことを特徴とする請求項１記載のレーザ溶
接方法。3. A laser welding method in which an end portion of one metal plate of two superposed metal plates is bent to irradiate a laser beam to a bent portion of three superposed metal plates, wherein the bent portion is formed. 2. The laser welding method according to claim 1, wherein the one metal plate is curved to provide a hollow portion between the welded portion and the bent portion of the bent portion.
金属板の端部を折り曲げて３枚重ねになった折り曲げ部
にレーザビームを照射して行うレーザ溶接方法におい
て、 前記３枚重ねの真ん中に位置する他方の金属板側で、前
記折り曲げ部の溶接箇所と前記他方の金属板の端部との
間に位置する部分に穴を設けたことを特徴とするレーザ
溶接方法。4. A laser welding method which comprises radiating a laser beam to a folded portion where three metal sheets are folded by bending an end portion of one of the two metal sheets that have been overlapped with each other. A laser welding method, characterized in that, on the side of the other metal plate located in the middle of the stack, a hole is provided in a portion located between the welded portion of the bent portion and the end of the other metal plate.
金属板の端部を折り曲げて３枚重ねになった折り曲げ部
にレーザビームを照射して行うレーザ溶接方法におい
て、 前記３枚重ねの真ん中に位置する他方の金属板側で、前
記折り曲げ部の溶接箇所の近傍で前記折り曲げ部の屈曲
部分側に切り欠き部分を設けたことを特徴とするレーザ
溶接方法。5. A laser welding method which comprises radiating a laser beam to a bent portion where three metal sheets are folded by bending an end portion of one of the two metal sheets which are overlapped with each other. A laser welding method, characterized in that, on the side of the other metal plate located in the middle of the overlap, a cutout portion is provided on the bent portion side of the bent portion in the vicinity of the welded portion of the bent portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5080400A JPH06285659A (en) | 1993-04-07 | 1993-04-07 | Laser welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5080400A JPH06285659A (en) | 1993-04-07 | 1993-04-07 | Laser welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06285659A true JPH06285659A (en) | 1994-10-11 |
Family
ID=13717243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5080400A Withdrawn JPH06285659A (en) | 1993-04-07 | 1993-04-07 | Laser welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06285659A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5897796A (en) * | 1997-06-16 | 1999-04-27 | Chrysler Corporation | Method and apparatus for in-situ laser welding of hemmed joints |
| US6344626B1 (en) * | 1999-05-06 | 2002-02-05 | Progressive Tool & Industries Co. | Apparatus and method for laser welding in a hemmer apparatus |
| JP2006000893A (en) * | 2004-06-17 | 2006-01-05 | Nissan Motor Co Ltd | Laser welding method |
| JP2008307584A (en) * | 2007-06-15 | 2008-12-25 | Honda Motor Co Ltd | Manufacturing method of edge-bending connection structure |
| US8042372B2 (en) * | 2008-03-14 | 2011-10-25 | GM Global Technology Operations LLC | Method of making an automotive closure panel assembly |
| US20110271728A1 (en) * | 2010-05-05 | 2011-11-10 | Vanimisetti Sampath K | Roller hemming with in-situ adhesive curing |
| JP2015174524A (en) * | 2014-03-14 | 2015-10-05 | スズキ株式会社 | sash door structure |
-
1993
- 1993-04-07 JP JP5080400A patent/JPH06285659A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5897796A (en) * | 1997-06-16 | 1999-04-27 | Chrysler Corporation | Method and apparatus for in-situ laser welding of hemmed joints |
| US6344626B1 (en) * | 1999-05-06 | 2002-02-05 | Progressive Tool & Industries Co. | Apparatus and method for laser welding in a hemmer apparatus |
| JP2006000893A (en) * | 2004-06-17 | 2006-01-05 | Nissan Motor Co Ltd | Laser welding method |
| JP2008307584A (en) * | 2007-06-15 | 2008-12-25 | Honda Motor Co Ltd | Manufacturing method of edge-bending connection structure |
| US8157943B2 (en) | 2007-06-15 | 2012-04-17 | Honda Motor Co., Ltd. | Method for producing hemmed joint structure |
| US8042372B2 (en) * | 2008-03-14 | 2011-10-25 | GM Global Technology Operations LLC | Method of making an automotive closure panel assembly |
| US20110271728A1 (en) * | 2010-05-05 | 2011-11-10 | Vanimisetti Sampath K | Roller hemming with in-situ adhesive curing |
| US8341992B2 (en) * | 2010-05-05 | 2013-01-01 | GM Global Technology Operations LLC | Roller hemming with in-situ adhesive curing |
| JP2015174524A (en) * | 2014-03-14 | 2015-10-05 | スズキ株式会社 | sash door structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000704 |