JPH0775888A - Laser beam welding method - Google Patents
Laser beam welding methodInfo
- Publication number
- JPH0775888A JPH0775888A JP5246296A JP24629693A JPH0775888A JP H0775888 A JPH0775888 A JP H0775888A JP 5246296 A JP5246296 A JP 5246296A JP 24629693 A JP24629693 A JP 24629693A JP H0775888 A JPH0775888 A JP H0775888A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- laser
- welded
- continuous
- hemming
- 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、被溶接物の重ね部にレ
ーザを照射して溶接する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 for irradiating a lap portion of an object to be welded with a laser for welding.
【０００２】[0002]
【従来の技術】近年、自動車部品のアルミニウム化が進
む中で、例えばボンネットをアルミニウム合金で製作す
る試みがなされている。この場合、アウタパネルとイン
ナパネルとを周縁のヘミング加工部で溶接する必要があ
るが、鋼板に対するような汎用のスポット溶接を用いた
のでは、加圧力によって溶接部が大きく変形し、その使
用は断念せざるを得ないようになる。一方、スポット溶
接に代わるものとしてＭＩＧ溶接あるいはＴＩＧ溶接の
利用が考えられるが、この場合は、鉄系材料に比べて熱
伝導率や熱膨張率がきわめて大きいというアルミニウム
系材料の特性のため、凝固収縮量の増大や熱影響部の拡
大が避けられず、溶着部の周りに大きな引張り応力が発
生して面歪みが大きく表われ、その手直しが避けられな
いようになる。2. Description of the Related Art In recent years, with the progress of aluminization of automobile parts, for example, attempts have been made to manufacture a bonnet from an aluminum alloy. In this case, it is necessary to weld the outer panel and the inner panel at the peripheral hemming portion, but if general-purpose spot welding such as for steel plates is used, the welding portion is greatly deformed by the applied pressure and its use is abandoned. You will be forced to do so. On the other hand, MIG welding or TIG welding may be used as an alternative to spot welding. In this case, solidification is caused by the characteristics of aluminum-based materials, which have extremely high thermal conductivity and coefficient of thermal expansion compared to iron-based materials. Increasing the amount of shrinkage and expanding the heat-affected zone are unavoidable, large tensile stress is generated around the welded portion, and large surface strain appears.
【０００３】そこで最近、アルミニウム系材料に対する
レーザ溶接の適用が注目され、上記ボンネットをレーザ
溶接により製作する試みが一部でなされている（例えば
「NIKKEL MECHANICAL 」1993.5.3 P 16〜20，日経ＢＰ
社参照）。このレーザ溶接方法は、レーザとしてＹＡＧ
レーザを用い、これを光ファイバーによりロボット先端
のレーザトーチ（図示略）に導き、図１０に示すよう
に、ボンネット（被溶接物）１を構成するアウタパネル
１ａとインナパネル１ｂとの重ね部（こゝではヘミング
加工部）２の上に設定した溶接計画線Ｌに沿って前記レ
ーザトーチを移動させ、レーザを断続的に照射して所定
長さ（10〜20mm程度）の連続溶着部３を所定のピッチで
断続的に形成していくものである。なお、レーザとして
ＹＡＧレーザを用いているのは、ＣＯ2 レーザと比較し
て、反射率の高いアルミニウム系材料に対する吸収率が
高いこと、発振波長が1.06μｍと小さくて石英（SiO2）
にほとんど吸収されず、光ファイバーによるフレキシブ
ルな伝送が可能であること、パルス発振出力で大きなピ
ーク出力が得られることなどの理由による。Therefore, recently, the application of laser welding to aluminum-based materials has attracted attention, and some attempts have been made to produce the bonnet by laser welding (for example, "NIKKEL MECHANICAL" 1993.5.3 P 16-20, Nikkei BP).
See company). This laser welding method uses YAG as a laser.
Using a laser, this is guided by an optical fiber to a laser torch (not shown) at the tip of the robot, and as shown in FIG. 10, the overlapping portion (in this case, the outer panel 1a and the inner panel 1b constituting the bonnet (workpiece) 1) The laser torch is moved along the welding planned line L set on the hemming portion 2 and the laser is intermittently irradiated to continuously weld the welding portion 3 having a predetermined length (about 10 to 20 mm) at a predetermined pitch. It is formed intermittently. It should be noted that the YAG laser is used as the laser because it has a higher absorptance with respect to an aluminum-based material having a higher reflectance and a smaller oscillation wavelength of 1.06 μm than quartz (SiO 2 ) as compared with the CO 2 laser.
This is because it is hardly absorbed by the optical fiber, flexible transmission by optical fiber is possible, and a large peak output is obtained by pulse oscillation output.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記レ
ーザ溶接によれば、部分的とはいえ連続溶接を行って連
続溶着部３を形成していくため、連続溶着部３の凝固収
縮量およびその周辺の熱影響部の熱収縮量が比較的大き
くなり、ＭＩＧ溶接あるいはＴＩＧ溶接の場合に比して
程度は小さいものの、連続溶着部３の周りに比較的大き
な引張り応力が発生し、局部的な面歪みの発生が避けら
れないという問題があった。However, according to the above-mentioned laser welding, since the continuous weld 3 is formed by performing the continuous weld, although partially, the solidification shrinkage amount of the continuous weld 3 and the periphery thereof. Although the amount of heat shrinkage in the heat-affected zone is relatively large, and to a lesser extent than in the case of MIG welding or TIG welding, a relatively large tensile stress is generated around the continuous welded portion 3 and local surface There was a problem that the occurrence of distortion was unavoidable.
【０００５】本発明は、上記従来の問題を解決すること
を課題としてなされたもので、その目的とするところ
は、連続溶着部の周りおよび一般部における面歪みの発
生を大幅に抑制できるレーザ溶接方法を提供することに
ある。The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is laser welding capable of significantly suppressing the occurrence of surface strain around the continuous welded portion and in the general portion. To provide a method.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、第１の発明は、被溶接物の重ね部の上に設定した溶
接計画線に沿って断続的にレーザを照射して所定長さの
連続溶着部を断続的に形成していくレーザ溶接方法にお
いて、前記被溶接物の、前記連続溶着部の周りに対応す
る部分に、溶接により発生する応力を解放するための逃
げ部を予め形成するようにしたことを特徴とする。To achieve the above object, a first invention is to irradiate a laser intermittently along a welding planned line set on a lap portion of an object to be welded to give a predetermined length. In the laser welding method of intermittently forming the continuous welded portion, the relief portion for releasing the stress generated by welding is formed in advance in the portion corresponding to the periphery of the continuous welded portion of the object to be welded. It is characterized by doing so.
【０００７】また、第２の発明は、被溶接物の重ね部の
上に設定した溶接計画線に沿って断続的にレーザを照射
して所定長さの連続溶着部を断続的に形成していくレー
ザ溶接方法において、前記連続溶着部の相互間では、下
側の被溶接物まで溶け込みが達しない出力でレーザを照
射するようにしたことを特徴とする。A second aspect of the invention is to intermittently form a continuous welded portion having a predetermined length by irradiating a laser intermittently along a welding planned line set on the overlapped portion of the workpiece. In some laser welding methods, the laser is irradiated between the continuous welded portions at an output that does not reach the lower workpiece.
【０００８】さらに、第３の発明は、被溶接物のヘミン
グ加工部の上に設定した溶接計画線に沿って断続的にレ
ーザを照射して所定長さの連続溶着部を断続的に形成し
ていくレーザ溶接方法において、予め被溶接物に形成さ
れたヘミングフランジ部とコーナ湾曲部との交線上また
は該交線に近接する部位に前記溶接計画線を設定するよ
うにしたことを特徴とする。Further, according to a third aspect of the present invention, a laser is intermittently irradiated along a welding planned line set on a hemming portion of an object to be welded to intermittently form a continuous welded portion of a predetermined length. In the laser welding method, the welding planned line is set on the intersection line of the hemming flange portion and the corner curved portion formed on the object to be welded in advance or at a portion close to the intersection line. .
【０００９】[0009]
【作用】上記のように構成したレーザ溶接方法において
は、第１の発明では、連続溶着部の周りの逃げ部により
引張り応力が解放され、また第２の発明では、連続溶着
部の周りに発生する引張り応力が連続溶着部の相互間で
発生する引張り応力により減殺され、さらに第３発明で
は、溶接部位が高剛性となって変形抵抗が高まり、何れ
も面歪みの発生が著しく低減されるか、皆無となる。In the laser welding method configured as described above, in the first invention, the tensile stress is released by the relief portion around the continuous welded portion, and in the second invention, the tensile stress is generated around the continuous welded portion. The tensile stress generated by the continuous welding is reduced by the tensile stress generated between the welded portions. Further, in the third aspect of the invention, the welded part has high rigidity and the deformation resistance is increased, and the occurrence of the surface strain is remarkably reduced. , There is nothing.
【００１０】[0010]
【実施例】以下、本発明の実施例を添付図面にもとづい
て説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１１】図１および図２は、本発明の第１実施例を
示したものである。なお、以下の実施例は前記アルミニ
ウム合金製のボンネット（被溶接物）１のヘミング加工
部２を対象になされたもので、以下の図において前出図
１０に示した部分と同一部分には同一符号を付すことと
する。本第１実施例の特徴とするところは、ボンネット
１を構成するアウタパネル１ａのヘミングフランジ部
（後にヘミング加工部２となる）10に、予めその端縁に
対してＶ字形に開く切欠き11を多数形成し、これら切欠
き11のうちの各一対を連続溶着部３の前・後端に近接す
る部位に対応する部位に位置させ、ヘミング加工後、そ
のヘミング加工部２上の溶接計画線Ｌに沿って、図３に
示す溶接装置13を用いてレーザ溶接を行い、各一対の切
欠き11の間に連続溶着部３を形成するようにした点にあ
る。1 and 2 show a first embodiment of the present invention. The following examples are intended for the hemming portion 2 of the aluminum alloy bonnet (workpiece to be welded) 1. In the following drawings, the same portions as those shown in FIG. The reference numeral will be attached. The feature of the first embodiment is that the outer panel 1a of the hood 1 has a hemming flange portion (which will later become the hemming portion 2) 10 provided with a notch 11 that opens in a V-shape with respect to its edge in advance. A large number of these notches 11 are formed, and each pair of these notches 11 is positioned at a portion corresponding to a portion near the front and rear ends of the continuous welded portion 3, and after the hemming, the welding planned line L on the hemming portion 2 is formed. Along with the above, laser welding is performed using the welding device 13 shown in FIG. 3 to form the continuous welded portion 3 between each pair of notches 11.
【００１２】こゝで、溶接装置13は、被溶接物１を位置
決め載置するワーク受台14と、ワーク受台14に隣接して
設置された多軸のロボット15とを備え、ロボット15の手
首部15ａには集光光学系を内蔵するレーザトーチ16が取
付けられている。レーザトーチ16には、別途設置したＹ
ＡＧレーザ発信機17から光ファイバー18を介してパルス
発振のＹＡＧレーザが伝送されるようになっている。19
はロボット制御装置であり、ロボット15は、このロボッ
ト制御装置19の指示に従って動作し、その手首部15ａに
支持したレーザトーチ16を被溶接物１のヘミング加工部
２の板面に指向させかつ溶接計画線Ｌに沿って所定の速
度で移動させる。なお、ＹＡＧレーザ発信機17の平均出
力は500 〜700 Ｗとなっている。Here, the welding device 13 is provided with a work pedestal 14 for positioning and placing the work 1 to be welded, and a multi-axis robot 15 installed adjacent to the work pedestal 14. A laser torch 16 having a focusing optical system is attached to the wrist 15a. Laser torch 16 has a separately installed Y
A pulsed YAG laser is transmitted from the AG laser oscillator 17 through the optical fiber 18. 19
Is a robot controller, and the robot 15 operates in accordance with instructions from the robot controller 19 to direct the laser torch 16 supported on the wrist 15a thereof to the plate surface of the hemming processing portion 2 of the workpiece 1 and to perform a welding plan. It is moved at a predetermined speed along the line L. The average output of the YAG laser oscillator 17 is 500 to 700 W.
【００１３】上記溶接装置13によりレーザ溶接を行うに
は、先ずワーク受台14上に被溶接物１をセットし、教示
操作盤（図示略）を操作して被溶接物１のヘミング加工
部２上の溶接計画線Ｌに沿う動作軌跡をロボット制御装
置19に記憶させる。次に、ロボット制御装置19を起動さ
せると共に、レーザ発信機17を起動させると、レーザト
ーチ16がロボット制御装置19に予め記憶された教示内容
に従って溶接計画線Ｌ上を所定の速度で移動し、これと
同時にレーザトーチ16からはパルス発振のＹＡＧレーザ
が所定のタイミングで連続的に（一例として１５〜２０
発）出射される。これにより被溶接物１のヘミング加工
部２上には、一対の切欠き11の間に位置して所定長さ
（一例として１０〜２０mm）の連続溶着部３が断続的に
形成されるようになる。In order to perform laser welding by the welding device 13, first, the work piece 1 is set on the work pedestal 14, and a teaching operation panel (not shown) is operated to perform the hemming processing part 2 of the work piece 1. The robot control device 19 is made to memorize the movement locus along the upper welding planned line L. Next, when the robot controller 19 and the laser transmitter 17 are activated, the laser torch 16 moves on the planned welding line L at a predetermined speed in accordance with the teaching content stored in advance in the robot controller 19, and At the same time, a pulsed YAG laser is continuously emitted from the laser torch 16 at a predetermined timing (for example, 15 to 20).
It is emitted. As a result, the continuous welded portion 3 having a predetermined length (10 to 20 mm as an example) located between the pair of notches 11 is intermittently formed on the hemmed portion 2 of the workpiece 1. Become.
【００１４】ところで、上記溶接に際しては、連続溶着
部３の凝固収縮およびその周辺の熱影響部の熱収縮によ
り連続溶着部３の周りに比較的大きな引張り応力が発生
し、従来であれば、この引張り応力により連続溶着部３
の周りおよび一般部に大きな局部的な面歪みが発生して
いた。しかしながら、本第１実施例によれば、連続溶着
部３の前・後方向の切欠き11が前記引張り応力を解放す
る逃げ部として機能し、この結果、前記局部的な面歪み
の発生は著しく低減されるか、皆無となる。By the way, during the welding, a relatively large tensile stress is generated around the continuous welded portion 3 due to the solidification shrinkage of the continuous welded portion 3 and the heat shrinkage of the heat-affected zone around the continuous welded portion 3. Continuous weld 3 due to tensile stress
A large local surface strain was generated around and in the general area. However, according to the first embodiment, the notches 11 in the front and rear directions of the continuous welded portion 3 function as a relief portion for releasing the tensile stress, and as a result, the local surface strain is remarkably generated. Reduced or eliminated altogether.
【００１５】なお、上記切欠き11として設けた逃げ部
は、例えば図４に示すような種々の形状とすることがで
きる。すなわち、同図（ａ）は連続溶着部３の前・後端
に近接する部位に設けたスリット11ａを、同図（ｂ）は
前記切欠き11と同様の態様で設けたスリット11ｂを、同
図（ｃ）は連続溶着部３の一側に沿うように設けたスリ
ット11ｃを、、同図（ｄ）は連続溶着部３の一側と両端
とを囲むように設けたスリット11ｄをそれぞれ示し、こ
れらは何れも前記切欠き11に代わる逃げ部として機能す
る。また、同図（ｅ）はヘミングフランジ部10を部分的
に延長してこの延長部10ａに連続溶着部３を形成し、該
延長部10ａの両側方の切除部11ｅを逃げ部として機能さ
せた例を示している。The relief portion provided as the notch 11 may have various shapes as shown in FIG. 4, for example. That is, (a) of the figure shows slits 11a provided in a portion close to the front and rear ends of the continuous welded part 3, and (b) of the same figure shows slits 11b provided in the same manner as the notch 11. FIG. 6C shows a slit 11c provided along one side of the continuous welded portion 3, and FIG. 7D shows a slit 11d provided so as to surround one side and both ends of the continuous welded portion 3. Any of these functions as a relief portion in place of the notch 11. Further, in FIG. 6 (e), the hemming flange portion 10 is partially extended to form the continuous welded portion 3 on the extension portion 10a, and the cutout portions 11e on both sides of the extension portion 10a are made to function as relief portions. An example is shown.
【００１６】図５および図６は、本発明の第２実施例を
示したものである。本第２実施例の特徴とするところ
は、溶接計画線Ｌ上をレーザトーチ（16）を移動させる
際、連続溶着部３の相互間でもレーザを照射するように
した点にある。この場合、連続溶着部３の相互間ではヘ
ミング加工部２のインナパネル１ｂまで溶け込みが到達
しない出力でレーザ照射は行い、これにより連続溶着部
３の相互間には深さの浅いビード20が形成される。本第
２実施例によれば、前記ビード20の周りにも引張り応力
が発生するので、連続溶着部の周りに発生する引張り応
力がこのビード20の周りの引張り応力により減殺され、
面歪みの発生は著しく抑制されるか、皆無となる。5 and 6 show a second embodiment of the present invention. A feature of the second embodiment is that when the laser torch (16) is moved on the welding planned line L, the laser is irradiated even between the continuous welded portions 3. In this case, the laser irradiation is performed between the continuous welded portions 3 so that the melt does not reach the inner panel 1b of the hemming portion 2, whereby the beads 20 having a shallow depth are formed between the continuous welded portions 3. To be done. According to the second embodiment, since tensile stress is also generated around the bead 20, the tensile stress generated around the continuous welded portion is reduced by the tensile stress around the bead 20,
The occurrence of surface distortion is significantly suppressed or eliminated.
【００１７】図７乃至図９は、本発明の第３実施例を示
したものである。本第３実施例の特徴とするところは、
予めアウタパネル１ａに形成されたヘミングフランジ部
10とコーナ湾曲部21との交線Ｓ上または該交線Ｓに近接
する部位に前記溶接計画線Ｌ，Ｌ´を設定した点にあ
る。一般にヘミング加工においては、ヘミングフランジ
部10の曲げ成形性を改善するため、図８に示すようにヘ
ミングフランジ部10と一般部22との間にコーナ湾曲部21
を形成するようにしている。本第３実施例は、へヘミン
グ加工工程で形成されたヘミングフランジ部10とコーナ
湾曲部21との交線Ｓを利用してレーザ溶接を行うように
したもので、該交線Ｓの部分は剛性が高くなっているの
で、この交線Ｓ上またはその近辺を溶接することによ
り、連続溶着部３の周りに発生する引張り応力に対する
変形抵抗が高まり、面歪みの発生は著しく抑制される。
こゝで、交線Ｓ上に近接する部位を溶接する場合は、該
交線Ｓから２〜３mm程度離れた部位に溶接計画線Ｌ´を
設定するのが望ましい（図９）。7 to 9 show a third embodiment of the present invention. The feature of the third embodiment is that
Hemming flange part formed on the outer panel 1a in advance
The welding planning lines L and L'are set on the intersection line S between the corner 10 and the corner curved portion 21 or at a portion close to the intersection line S. Generally, in the hemming process, in order to improve the bend formability of the hemming flange portion 10, as shown in FIG. 8, a corner curved portion 21 is provided between the hemming flange portion 10 and the general portion 22.
To form. In the third embodiment, laser welding is performed by utilizing the line of intersection S between the hemming flange portion 10 and the corner curved portion 21 formed in the hemming process, and the portion of the line of intersection S is Since the rigidity is high, by welding on the intersection line S or in the vicinity thereof, the deformation resistance against the tensile stress generated around the continuous welded portion 3 is increased, and the occurrence of surface strain is significantly suppressed.
Here, when welding a portion close to the intersection line S, it is desirable to set the welding plan line L ′ at a portion separated from the intersection line S by about 2 to 3 mm (FIG. 9).
【００１８】なお、上記複数の実施例において、アルミ
ニウム合金製ボンネットの製作に適用した場合を示した
が、本発明の適用対象は任意であり、歪みの発生し易い
材料、例えば薄鋼板、銅系材料、マグネシウム系材料等
を対象にし得ることはもちろんである。また、上記実施
例においてヘミング加工部２の溶接に適用した場合を示
したが、本発明の適用部位はこれに限定されず、種々の
部品の重ね溶接に適用できる。In the above-described embodiments, the case where the present invention is applied to the production of an aluminum alloy bonnet is shown. However, the present invention is applicable to any material, and a material that easily causes strain, such as a thin steel plate or a copper-based material. Of course, it is possible to target materials, magnesium-based materials and the like. Further, although the case where the present invention is applied to the welding of the hemming portion 2 is shown in the above-mentioned embodiment, the application site of the present invention is not limited to this, and can be applied to the lap welding of various parts.
【００１９】[0019]
【発明の効果】以上、詳細に説明したように、本発明に
かゝるレーザ溶接方法によれば、連続溶着部の周りに発
生する引張り応力を解放または減殺し、あるいは該引張
り応力に耐えるように溶接部位を特定して、面歪みの発
生を抑制することを可能としたので、面歪みの発生し易
い材料および部品の溶接に向けて好適となる効果があ
る。As described above in detail, according to the laser welding method of the present invention, it is possible to release or reduce the tensile stress generated around the continuous welded portion, or to endure the tensile stress. Since it is possible to specify the welding site and suppress the occurrence of surface strain, there is an effect that it is suitable for welding materials and parts that are likely to cause surface strain.
【図１】本発明の第１実施例を示す斜視図である。FIG. 1 is a perspective view showing a first embodiment of the present invention.
【図２】図１のＡ−Ａ矢視線に沿う断面図である。FIG. 2 is a cross-sectional view taken along the line AA of FIG.
【図３】本発明で用いる溶接装置の一例を模式的に示す
斜視図である。FIG. 3 is a perspective view schematically showing an example of a welding device used in the present invention.
【図４】本発明の第１実施例の変形例を示す斜視図であ
る。FIG. 4 is a perspective view showing a modification of the first embodiment of the present invention.
【図５】本発明の第２実施例を示す斜視図である。FIG. 5 is a perspective view showing a second embodiment of the present invention.
【図６】図５のＢ−Ｂ矢視線に沿う断面図である。6 is a cross-sectional view taken along the line BB of FIG.
【図７】本発明の第３実施例を示す斜視図である。FIG. 7 is a perspective view showing a third embodiment of the present invention.
【図８】第３実施例で用いる被溶接物の素材形状を示す
側面図である。FIG. 8 is a side view showing a material shape of an object to be welded used in the third embodiment.
【図９】図７のＣ−Ｃ矢視線に沿う断面図である。9 is a sectional view taken along the line C-C of FIG.
【図１０】従来のレーザ溶接方法の溶接状態を示す斜視
図である。FIG. 10 is a perspective view showing a welding state of a conventional laser welding method.
１ 被溶接物 ３ 連続溶着部 10 ヘミングフランジ部 11 スリット（逃げ部） 20 ビード Ｌ 溶接計画線 Ｓ 交差線 1 Welded object 3 Continuous welded part 10 Hemming flange part 11 Slit (relief part) 20 Bead L Welding plan line S Crossing line
───────────────────────────────────────────────────── フロントページの続き (72)発明者 安松 智 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 (72)発明者 中村 尚範 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Yasumatsu 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Co., Ltd. (72) Inventor Naori Nakamura 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Co., Ltd.
Claims (3)
画線に沿って断続的にレーザを照射して所定長さの連続
溶着部を断続的に形成していくレーザ溶接方法におい
て、前記被溶接物の、前記連続溶着部の周りに対応する
部分に、溶接により発生する応力を解放するための逃げ
部を予め形成したことを特徴とするレーザ溶接方法。1. A laser welding method of intermittently irradiating a laser along a welding planned line set on a lap portion of a workpiece to intermittently form a continuous welded portion of a predetermined length, A laser welding method, characterized in that a relief portion for releasing a stress generated by welding is previously formed in a portion of the object to be welded, which corresponds to the periphery of the continuous welded portion.
画線に沿って断続的にレーザを照射して所定長さの連続
溶着部を断続的に形成していくレーザ溶接方法におい
て、前記連続溶着部の相互間では、下側の被溶接物まで
溶け込みが達しない出力でレーザを照射することを特徴
とするレーザ溶接方法。2. A laser welding method for intermittently irradiating a laser along a planned welding line set on a lap portion of an object to be welded to intermittently form a continuous welded portion having a predetermined length, A laser welding method, characterized in that between the continuous welded portions, a laser is irradiated with an output that does not reach the lower workpiece.
た溶接計画線に沿って断続的にレーザを照射して所定長
さの連続溶着部を断続的に形成していくレーザ溶接方法
において、予め被溶接物に形成されたヘミングフランジ
部とコーナ湾曲部との交線上または該交線に近接する部
位に前記溶接計画線を設定することを特徴とするレーザ
溶接方法。3. A laser welding method for intermittently irradiating a laser along a planned welding line set on a hemming portion of an object to be welded to intermittently form a continuous welded portion of a predetermined length. A laser welding method, wherein the welding planned line is set on an intersection line of a hemming flange portion and a corner curved portion formed in advance on an object to be welded or at a portion close to the intersection line.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05246296A JP3099605B2 (en) | 1993-09-07 | 1993-09-07 | Laser welding method |
| DE69430151T DE69430151T2 (en) | 1993-05-21 | 1994-05-17 | Laser welding processes |
| EP94303506A EP0628375B1 (en) | 1993-05-21 | 1994-05-17 | Laser welding method |
| US08/245,607 US5451742A (en) | 1993-05-21 | 1994-05-19 | Laser welding method |
| KR1019940011101A KR970010887B1 (en) | 1993-05-21 | 1994-05-21 | Laser welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05246296A JP3099605B2 (en) | 1993-09-07 | 1993-09-07 | Laser welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0775888A true JPH0775888A (en) | 1995-03-20 |
| JP3099605B2 JP3099605B2 (en) | 2000-10-16 |
Family
ID=17146449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05246296A Expired - Fee Related JP3099605B2 (en) | 1993-05-21 | 1993-09-07 | Laser welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3099605B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008307584A (en) * | 2007-06-15 | 2008-12-25 | Honda Motor Co Ltd | Manufacturing method of edge-bending connection structure |
| JP2009513358A (en) * | 2005-10-26 | 2009-04-02 | エムティーユー エアロ エンジンズ ゲーエムベーハー | Manufacturing method of welded joint |
| EP3088099A1 (en) * | 2015-04-28 | 2016-11-02 | Tower Automotive Holding GmbH | Method of manufacturing a multi-component compound lightweight vehicle body part and automated assembly station for performing said method |
| JP2017225999A (en) * | 2016-06-23 | 2017-12-28 | トヨタ自動車株式会社 | Welding method |
-
1993
- 1993-09-07 JP JP05246296A patent/JP3099605B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009513358A (en) * | 2005-10-26 | 2009-04-02 | エムティーユー エアロ エンジンズ ゲーエムベーハー | Manufacturing method of welded joint |
| 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 |
| EP3088099A1 (en) * | 2015-04-28 | 2016-11-02 | Tower Automotive Holding GmbH | Method of manufacturing a multi-component compound lightweight vehicle body part and automated assembly station for performing said method |
| JP2017225999A (en) * | 2016-06-23 | 2017-12-28 | トヨタ自動車株式会社 | Welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3099605B2 (en) | 2000-10-16 |
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