JP4553467B2

JP4553467B2 - Manual laser welding head

Info

Publication number: JP4553467B2
Application number: JP2000270509A
Authority: JP
Inventors: 誠志後藤; 治巳西山; 一裕高林
Original assignee: Amada Co Ltd
Current assignee: Amada Co Ltd
Priority date: 2000-09-06
Filing date: 2000-09-06
Publication date: 2010-09-29
Anticipated expiration: 2020-09-06
Also published as: JP2002079391A

Description

【０００１】
【発明の属する技術分野】
本発明は手動レーザ溶接ヘッドに関する。
【０００２】
【従来の技術】
ＹＡＧレーザ加工機において溶接を行う場合、レーザ加工機本体のレーザ加工ヘッドを使用せずに、図７に示すような付属の手動レーザ溶接ヘッド１００を手に持って溶接を行うことがある。
【０００３】
手動レーザ溶接ヘッド１００におけるレーザ光の焦点は、ノズル１０１の先端近くにくるように設定してあるので、レーザ加工ヘッド１００のノズル１０１をワークＷに当接させることにより、ワーク表面に焦点が定まるようになっている。
【０００４】
手動レーザ溶接ヘッド１００の移動は、ノズル１０１の先端をワークＷに接触させたまま行う。また、移動経路の直進性を確保したいときには、ワーク表面に直線定規１０３を置いて、この直線定規１０３にノズル１０１の先端を沿わせて移動させるようにしている。
【０００５】
図８に示す如く、上述のノズルの先端形状は、溶接部の形状に合わせて幾種類かが用意されている。例えば、ノズル先端が平坦な突合わせ継手用（図８（ａ））、ノズル先端にヒール部を設けた角継手用（図８（ｂ））、ノズル先端を山形にした山形の角継手用（図８（ｃ））などがある。
【０００６】
【発明が解決しようとする課題】
しかし、上述のような従来の手動レーザ溶接ヘッドにおいては、ノズルの先端をワーク接触させた状態で移動させるので、移動中にノズルがワークに引っかかったりして、手ぶれをおこし移動速度が安定しないなどの問題がある。
【０００７】
移動速度が安定しないと、溶接の溶込が一定せず溶接不良となる危険性がある。また、出来映えが作業者の熟練度に作用されやすい。
【０００８】
本発明は上述の如き問題を解決するために成されたものであり、本発明の課題は、比較的に安定した移動速度が得られると共に、レーザ溶接ヘッドの姿勢を変えても集光位置が変化しない手動レーザ溶接ヘッドを提供することである。
【０００９】
【課題を解決するための手段】
上述の課題を解決する手段として請求項１に記載の手動レーザ溶接ヘッドは、レーザ光を集光する集光手段を備えた手動レーザ溶接ヘッドにおいて、被溶接材の水平な第一面と垂直な第二面とがほぼ直角に交差する角継手溶接部近傍の外側二面上を第一のガイド手段と第二のガイド手段とを介して移動可能に係合し、かつ前記溶接部の溶接線上方を該溶接線に沿って走行自在の走行ガイドを設け、該走行ガイドの形状は球体の下側の約１／４を切り欠いた半球状からなり、該半球状の走行ガイド上部に前記第一面上に中心を有する球面を設け、該球面に回動自在にかつ係脱自在に係合する下に凹の半球面からなる凹部を備えた走行ガイド受けを前記手動レーザ溶接ヘッド下部に設け、前記半球状の走行ガイド上部から前記第二面に沿って下方へ延伸する延伸部を設け、該延伸部に前記第二面とレーザ光の光軸との距離を調節可能な前記第二のガイド手段を設け、かつ前記レーザ光の焦点を前記走行ガイドの球面の中心に設定してなることを要旨とするものである。
【００１０】
請求項２に記載の手動レーザ溶接ヘッドは、レーザ光を集光する集光手段を備えた手動レーザ溶接ヘッドにおいて、被溶接材の第一面と第二面とが水平に当接する突合わせ溶接部の溶接線に沿って設けた定規と、第一面または第二面の何れか一方の被溶接材とにガイド手段を介して移動可能に係合し、かつ前記溶接線上方を該溶接線に沿って走行自在の走行ガイドを設け、該走行ガイドの形状は球体の下側の約半分を切り欠いた半球状からなり、該半球状の走行ガイド上部に前記第一面または第２面上に中心を有する球面を設け、該球面に回動自在にかつ係脱自在に係合する下に凹の半球面からなる凹部を備えた走行ガイド受けを前記手動レーザ溶接ヘッド下部に設け、前記レーザ光の焦点を前記走行ガイドの球面の中心に設定してなることを要旨とするものである。
【００１１】
請求項３に記載の手動レーザ溶接ヘッドは、請求項１または請求項２に記載の手動レーザ溶接ヘッドにおいて、前記走行ガイド受けに、前記手動レーザ溶接ヘッドを傾斜させた際に前記走行ガイド受けと被溶接材との干渉を回避すべく、該走行ガイド受けの中心から上方に開いた切欠きを設けてなることを要旨とするものである。
【００１２】
請求項４に記載の手動レーザ溶接ヘッドは、請求項１に記載の手動レーザ溶接ヘッドにおいて、第一のガイド手段と第二のガイド手段は前記被溶接材の溶接部近傍の外側二面に回転自在に係合するローラからなること要旨とするものである。
【００１３】
請求項５に記載の手動レーザ溶接ヘッドは、請求項２に記載の手動レーザ溶接ヘッドにおいて、前記ガイド手段は前記被溶接材と前記定規とに回転自在に係合するローラからなること要旨とするものである。
【００１４】
【発明の実施の形態】
以下本発明の実施の形態を図面によって説明する。図１および図２を参照するに、手動レーザ溶接ヘッド１は、上下に延伸する円筒形の本体３を有し、この本体３の内部には、光ファイバケーブル５の端末から出射されたレーザ光（ＹＡＧレーザ）をコリメートする光学系（図示省略）と、コリメートされたレーザ光を集光する集光手段として、例えば凸レンズなどからなる集光用光学系（図示省略）が内蔵してある。
【００１５】
上述の手動レーザ溶接ヘッド１の下部には、被溶接材Ｗの溶接線７の上方を該溶接線７に沿って走行する走行ガイド９に係脱自在に係合する走行ガイド受け１１が装着してある。
【００１６】
走行ガイド９の形状は、球体の中心から下側の約１／２を中心から扇形に切り欠いた残りの約３／４の部分からなり、この走行ガイド９には、被溶接材Ｗのほぼ直角に交差する溶接部近傍の外側の二面上に回転自在に係合する複数のローラ１３（ａ，ｂ）がガイド手段として設けてある。
【００１７】
上述のガイド手段をより詳細に述べれば、ガイド手段は被溶接材Ｗの第一面（水平面）１５上を走行する第一ローラ１３ａと、第二面（垂直面）１７上を走行する複数（実施例では二個）の第二ローラ１３ｂとで構成してある。
【００１８】
前記走行ガイド９の右側（図１において）は、前記第一ローラ１３ａが走行する被溶接材Ｗの第一面（水平面）１５よりも下方に延伸しており、この下方に延伸した走行ガイド９の下端部に二個の第二ローラ１３ｂを回転自在に軸支したスライドプレート１９がねじ２１により装着してある。
【００１９】
スライドプレート１９の上面には、図１において左右方向に延伸する凸部１９ａが設けてあり、前記走行ガイド９の下端部に設けた凹部にこの凸部１９ａが摺動可能に嵌合してある。
【００２０】
したがって、ねじ２１を緩めれば、スライドプレート１９を左右に移動調節することができる。すなわち、前記レーザ溶接ヘッド１に内蔵した集光用光学系（図示省略）におけるレーザ光ＬＢの光軸２３ｖに対して、第二ローラ１３ｂの位置を水平方向（図１の矢印方向）に移動調節することができる。
【００２１】
なお、前記ねじ２１は、スライドプレート１９に設けた左右方向に延びる長穴（図示省略）を介して走行ガイド９のねじ穴（図示省略）に螺合してある。
【００２２】
前記走行ガイド受け１１は、前記走行ガイド９の球面２５に回動自在に係合する下に凹の半球面からなる凹部２７を有している。また、図２によく現れているように、走行ガイド受け１１の右側（図２において右側）には中心から角度約３０°（特に３０°に限定はしない）の切り欠きが設けてある。
【００２３】
また、前記走行ガイド９の中心部には、前記集光用光学系で集光されたレーザ光ＬＢを通過させる漏斗状の穴２９が設けてある。
【００２４】
図３は、前記手動レーザ溶接ヘッド１の本体３を移動方向へ３０°傾斜させた状態を示したものであり、手動レーザ溶接ヘッド１の本体３は、走行ガイド９の球面２５の中心Ｏを回転中心として回動する。なお、想像線で示すように反対方向へも同様に傾斜させることができる。また、球面２５の中心Ｏは被溶接材Ｗの第一面（水平面）１５上に在る。
【００２５】
したがって、レーザ光ＬＢの焦点を球面２５の中心Ｏに合わせておけば、手動レーザ溶接ヘッド１の本体３をどの方向へ回動させてもレーザ光ＬＢの焦点は常に球面２５の中心Ｏに一致させることができる。すなわち、常に被溶接材Ｗの第一面（水平面）１５上に焦点を持ってくることができる。
【００２６】
図４は、前記走行ガイド９と走行ガイド受け１１とを分離させた状態を示したものであり、溶接作業のときには、作業者は被溶接材の溶接部に使用する走行ガイド９をセットし、その走行ガイド９に走行ガイド受け１１を係合させれば、溶接線に沿って正確にかつ軽快にレーザ溶接ヘッド１を手動で移動させることができる。
【００２７】
次に、角継手の合わせ目に段差をつけて溶接する場合、レーザ光の焦点位置をどの様に設定するかを図５を参照しながら説明する。
【００２８】
板厚がｔ(mm)の角継手において、被溶接材Ｗの第一面（水平面）１５に対して、
第二面（垂直面）１７の端部をｂ(mm)だけ下げて、段部のコーナーにレーザ光ＬＢの光軸を垂直方向から４５度傾斜（光軸２３ｋ）させて照射する場合、レーザ溶接ヘッド１を垂直にしたときの光軸２３ｖの位置は、第二面（垂直面）１７からａ(mm)内側に移動し、第一面（水平面）１５と移動した光軸２３ｖとの交点Ｏがレーザ溶接ヘッド１の回動中心となる。したがって、レーザ光ＬＢはこの交点Ｏを通って４５°の角度で段部のコーナーに照射されることになる。
【００２９】
なお、光軸２３ｖの第二面（垂直面）１７からの距離ａは、
【数１】
ａ＝ｔ−ｂ*cot４５°
として求められるので、この数値をもとに第二ローラ１３ｂの位置を調節すればよい。例えば、ｔ＝１、ｂ＝０．５ならば、ａ＝０．５である。
【００３０】
図６は、突合せ継手に使用する走行ガイド９の例を示したものである。この場合には、被溶接材Ｗの溶接線７に平行に定規３１を固定して設け、この定規３１の基準側面３３に係合して回転する基準ローラ３５と、前記定規３１上の基準面３７と被溶接材Ｗの表面３９に係合して回転走行する走行ローラ４１ａ，４１ｂが走行ガイド４３に設けてある。
【００３１】
なお、前記定規３１の基準面３７は被溶接材Ｗの表面３９に平行になるように設けてある。また、基準側面３３と光軸２３ｖとの間の距離は適宜な値ｄに設定してあり、走行ガイド４３が走行ガイド受け１１と回動自在に係合する球面２５の中心は被溶接材Ｗの表面３９に位置する様に設けてある。
【００３２】
したがって、レーザ光ＬＢの焦点を被溶接材Ｗの溶接線７上に合うように調節しておけば、レーザ溶接ヘッド１を移動、或いは傾斜させても移動しても常に焦点が溶接線７上にあわせることができる。
【００３３】
なお、前記ガイド手段には、ローラによるガイドに代えて低摩擦材を滑り軸受けとして使用しても同様な効果を得ることが可能である。
【００３４】
【発明の効果】
請求項１〜請求項５の発明によれれば、レーザ溶接ヘッドのノズルの先端をワーク接触させた状態で溶接線に沿って移動させるときに、ノズル移動がスムーズに行うことができるので移動速度が比較的安定する。また、レーザ溶接ヘッドの姿勢を変えても、常に加工位置にレーザの焦点を合わせることができる。
【００３５】
その結果、作業者の熟練度に作用されることなく溶け込み品質が一定となり溶接不良が生じない。
【図面の簡単な説明】
【図１】本発明に係る手動レーザ溶接ヘッドの正面図。
【図２】図１の左側面図。
【図３】レーザ溶接ヘッドの本体を移動方向へ３０°傾斜させた状態を示した図。
【図４】走行ガイドと走行ガイド受けとを分離させた状態を示した図。
【図５】段差のある角継手の合わせ目にレーザ光の焦点を設定するときの説明図。
【図６】突合せ継手に使用する走行ガイドの実施形態の一例。
【図７】従来の手動レーザ溶接ヘッドの説明図。
【図８】従来の手動レーザ溶接ヘッドにおける溶接部の形状に合わせたノズルの先端形状の例。
【符号の説明】
１手動レーザ溶接ヘッド
３本体
５光ファイバケーブル
７溶接線
９，４３走行ガイド
１１走行ガイド受け
１３ａ第一ローラ
１３ｂ第二ローラ
１５第一面（水平面）
１７第二面（垂直面）
１９スライドプレート
２１ねじ
２３ｋ，２３ｖ光軸
２５球面
２７凹部
２９漏斗状の穴
３１定規
３３基準側面
３５基準ローラ
３７基準面
３９被溶接材の表面
４１ａ，４１ｂ走行ローラ
ＬＢレーザ光
Ｗ被溶接材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manual laser welding head.
[0002]
[Prior art]
When welding is performed in a YAG laser beam machine, welding may be performed by holding the attached manual laser welding head 100 as shown in FIG. 7 without using the laser beam machining head of the laser beam machine body.
[0003]
Since the focal point of the laser beam in the manual laser welding head 100 is set to be close to the tip of the nozzle 101, the focal point is determined on the workpiece surface by bringing the nozzle 101 of the laser machining head 100 into contact with the workpiece W. It is like that.
[0004]
The manual laser welding head 100 is moved while the tip of the nozzle 101 is in contact with the workpiece W. Further, when it is desired to ensure the straightness of the movement path, a linear ruler 103 is placed on the work surface, and the tip of the nozzle 101 is moved along the linear ruler 103.
[0005]
As shown in FIG. 8, several types of nozzle tip shapes are prepared in accordance with the shape of the welded portion. For example, for a butt joint with a flat nozzle tip (FIG. 8 (a)), for a corner joint with a heel portion at the nozzle tip (FIG. 8 (b)), for a chevron corner joint with an angled nozzle tip ( FIG. 8 (c)) is available.
[0006]
[Problems to be solved by the invention]
However, in the conventional manual laser welding head as described above, since the tip of the nozzle is moved while being in contact with the workpiece, the nozzle is caught on the workpiece during movement, causing camera shake and the movement speed is not stable. There is a problem.
[0007]
If the moving speed is not stable, there is a risk of welding failure due to inconsistent welding penetration. Also, workmanship is easily affected by the skill level of the operator.
[0008]
The present invention has been made to solve the above-described problems, and the problem of the present invention is that a relatively stable moving speed can be obtained, and the focusing position can be changed even if the posture of the laser welding head is changed. It is to provide a manual laser welding head that does not change.
[0009]
[Means for Solving the Problems]
The manual laser welding head according to claim 1 as means for solving the above-described problem is a manual laser welding head having a light condensing means for condensing laser light, and is perpendicular to the horizontal first surface of the workpiece. Engageably engages on the outer two surfaces near the corner joint welded portion where the second surface intersects at a substantially right angle via the first guide means and the second guide means, and on the weld line of the welded portion. A traveling guide that can travel along the weld line is provided, and the shape of the traveling guide is a semispherical shape in which about 1/4 of the lower side of the sphere is cut out. A spherical guide having a center is provided on one surface, and a traveling guide receiver having a concave portion formed of a concave hemispherical surface is provided below the manual laser welding head so as to be rotatable and detachably engaged with the spherical surface. Down along the second surface from the upper part of the hemispherical travel guide An extending portion for extending is provided, the second guide means capable of adjusting the distance between the second surface and the optical axis of the laser beam is provided in the extending portion, and the focal point of the laser beam is set on the spherical surface of the traveling guide. The main point is to set it at the center .
[0010]
The manual laser welding head according to claim 2 is a manual laser welding head provided with a condensing means for condensing laser light, wherein the first surface and the second surface of the material to be welded are in contact with each other horizontally. Engaging a ruler provided along the weld line of the section and the material to be welded on either the first surface or the second surface via guide means, and above the weld line, the weld line The travel guide has a hemispherical shape in which approximately half of the lower side of the sphere is cut out, and the upper surface of the hemispherical travel guide is formed on the first surface or the second surface. A traveling guide receiver having a concave portion formed of a concave hemispherical surface under the spherical surface having a center that is rotatably and detachably engaged with the spherical surface. The light focus is set at the center of the spherical surface of the travel guide. It is an gist.
[0011]
The manual laser welding head according to claim 3 is the manual laser welding head according to claim 1 or 2 , wherein when the manual laser welding head is inclined to the traveling guide receiver, The gist is that a notch opened upward from the center of the traveling guide receiver is provided in order to avoid interference with the workpiece .
[0012]
The manual laser welding head according to claim 4 is the manual laser welding head according to claim 1 , wherein the first guide means and the second guide means rotate on two outer surfaces in the vicinity of the welded portion of the workpiece. The gist of the invention is that the roller is freely engaged .
[0013]
The manual laser welding head according to claim 5 is the manual laser welding head according to claim 2 , wherein the guide means includes a roller that rotatably engages the workpiece and the ruler. Is.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. Referring to FIGS. 1 and 2, the manual laser welding head 1 has a cylindrical main body 3 extending vertically, and a laser beam emitted from the end of an optical fiber cable 5 is provided inside the main body 3. An optical system (not shown) for collimating (YAG laser) and a condensing optical system (not shown) composed of, for example, a convex lens are incorporated as condensing means for condensing the collimated laser light.
[0015]
A traveling guide receiver 11 that is detachably engaged with a traveling guide 9 that travels along the welding line 7 above the welding line 7 of the workpiece W is attached to the lower portion of the manual laser welding head 1 described above. It is.
[0016]
The shape of the traveling guide 9 is composed of the remaining approximately 3/4 of which about 1/2 of the lower side from the center of the sphere is cut out in a fan shape from the center. A plurality of rollers 13 (a, b) that are rotatably engaged on two outer surfaces in the vicinity of the welded portion intersecting at right angles are provided as guide means.
[0017]
The guide means will be described in more detail. The guide means includes a first roller 13a that travels on the first surface (horizontal plane) 15 of the workpiece W and a plurality of (second surface (vertical surface) 17) that travels on the second surface (vertical surface) 17. In the embodiment, it is composed of two) second rollers 13b.
[0018]
The right side (in FIG. 1) of the travel guide 9 extends below the first surface (horizontal plane) 15 of the workpiece W on which the first roller 13a travels, and the travel guide 9 extends downward. A slide plate 19 that rotatably supports two second rollers 13b is mounted by screws 21 at the lower end of each.
[0019]
On the upper surface of the slide plate 19, a convex portion 19 a extending in the left-right direction in FIG. 1 is provided, and the convex portion 19 a is slidably fitted in a concave portion provided at the lower end portion of the traveling guide 9. .
[0020]
Therefore, if the screw 21 is loosened, the slide plate 19 can be moved and adjusted left and right. That is, the position of the second roller 13b is adjusted to move in the horizontal direction (arrow direction in FIG. 1) with respect to the optical axis 23v of the laser beam LB in the condensing optical system (not shown) built in the laser welding head 1. can do.
[0021]
The screw 21 is screwed into a screw hole (not shown) of the travel guide 9 through a long hole (not shown) provided in the slide plate 19 extending in the left-right direction.
[0022]
The travel guide receiver 11 has a concave portion 27 formed of a concave hemispherical surface under the rotational guide 25 so as to be rotatable. Further, as often shown in FIG. 2, a notch having an angle of about 30 ° (not specifically limited to 30 °) from the center is provided on the right side (right side in FIG. 2) of the travel guide receiver 11.
[0023]
A funnel-shaped hole 29 through which the laser beam LB condensed by the condensing optical system is passed is provided at the center of the traveling guide 9.
[0024]
FIG. 3 shows a state in which the main body 3 of the manual laser welding head 1 is inclined by 30 ° in the moving direction. The main body 3 of the manual laser welding head 1 has a center O of the spherical surface 25 of the traveling guide 9. It rotates as the center of rotation. In addition, as shown by an imaginary line, it can be similarly inclined in the opposite direction. The center O of the spherical surface 25 is on the first surface (horizontal plane) 15 of the workpiece W.
[0025]
Therefore, if the focus of the laser beam LB is set to the center O of the spherical surface 25, the focus of the laser beam LB always coincides with the center O of the spherical surface 25 regardless of the direction in which the main body 3 of the manual laser welding head 1 is rotated. Can be made. That is, the focal point can always be brought onto the first surface (horizontal plane) 15 of the workpiece W.
[0026]
FIG. 4 shows a state in which the traveling guide 9 and the traveling guide receiver 11 are separated from each other. In the welding operation, the operator sets the traveling guide 9 used for the welded portion of the material to be welded, When the traveling guide receiver 11 is engaged with the traveling guide 9, the laser welding head 1 can be manually moved accurately and easily along the welding line.
[0027]
Next, how to set the focal position of the laser beam when welding with a step at the joint of the corner joint will be described with reference to FIG.
[0028]
In a corner joint with a plate thickness of t (mm), the first surface (horizontal plane) 15 of the workpiece W is
When the end of the second surface (vertical surface) 17 is lowered by b (mm) and the optical axis of the laser beam LB is tilted by 45 degrees (optical axis 23k) from the vertical direction at the corner of the step portion, the laser is irradiated. The position of the optical axis 23v when the welding head 1 is vertical moves from the second surface (vertical surface) 17 to a (mm) inward, and the intersection of the first surface (horizontal surface) 15 and the moved optical axis 23v. O becomes the rotation center of the laser welding head 1. Accordingly, the laser beam LB is irradiated to the corner of the step portion through the intersection point O at an angle of 45 °.
[0029]
The distance a from the second surface (vertical surface) 17 of the optical axis 23v is
[Expression 1]
a = t-b * cot 45 °
Therefore, the position of the second roller 13b may be adjusted based on this numerical value. For example, if t = 1 and b = 0.5, a = 0.5.
[0030]
FIG. 6 shows an example of the travel guide 9 used for the butt joint. In this case, a ruler 31 is fixed in parallel with the weld line 7 of the workpiece W, a reference roller 35 that rotates by engaging with a reference side surface 33 of the ruler 31, and a reference surface on the ruler 31. Traveling rollers 41 a and 41 b that rotate and engage with the surface 37 of the workpiece 37 and the surface 39 of the workpiece W are provided on the traveling guide 43.
[0031]
The reference surface 37 of the ruler 31 is provided so as to be parallel to the surface 39 of the workpiece W. The distance between the reference side surface 33 and the optical axis 23v is set to an appropriate value d, and the center of the spherical surface 25 in which the travel guide 43 is rotatably engaged with the travel guide receiver 11 is the workpiece W to be welded. It is provided so that it may be located in the surface 39 of this.
[0032]
Therefore, if the focal point of the laser beam LB is adjusted so as to be aligned with the welding line 7 of the workpiece W, the focal point is always on the welding line 7 even if the laser welding head 1 is moved or tilted. Can be adapted.
[0033]
The same effect can be obtained by using a low friction material as a sliding bearing in place of the roller guide.
[0034]
【The invention's effect】
According to the first to fifth aspects of the present invention, when the nozzle tip of the laser welding head is moved along the welding line in a state where the nozzle is in contact with the workpiece, the nozzle can be moved smoothly, so the moving speed Is relatively stable. Further, the laser can always be focused on the processing position even if the posture of the laser welding head is changed.
[0035]
As a result, the penetration quality is constant without being affected by the skill level of the operator, and welding defects do not occur.
[Brief description of the drawings]
FIG. 1 is a front view of a manual laser welding head according to the present invention.
FIG. 2 is a left side view of FIG.
FIG. 3 is a view showing a state in which a main body of a laser welding head is inclined by 30 ° in a moving direction.
FIG. 4 is a diagram showing a state in which a travel guide and a travel guide receiver are separated.
FIG. 5 is an explanatory diagram when the focus of laser light is set at the joint of a stepped corner joint.
FIG. 6 shows an example of an embodiment of a travel guide used for a butt joint.
FIG. 7 is an explanatory diagram of a conventional manual laser welding head.
FIG. 8 shows an example of the shape of the tip of a nozzle in accordance with the shape of a weld in a conventional manual laser welding head.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manual laser welding head 3 Main body 5 Optical fiber cable 7 Welding line 9,43 Travel guide 11 Travel guide receiver 13a First roller 13b Second roller 15 First surface (horizontal surface)
17 Second surface (vertical surface)
19 Slide plate 21 Screw 23k, 23v Optical axis 25 Spherical surface 27 Recess 29 Funnel-shaped hole 31 Ruler 33 Reference side surface 35 Reference roller 37 Reference surface 39 Surface of welded material 41a, 41b Traveling roller LB Laser beam W Welded material

Claims

In a manual laser welding head equipped with condensing means for condensing laser light, on the outer two surfaces in the vicinity of the corner joint weld where the horizontal first surface and the vertical second surface of the work piece intersect at almost right angles Is provided so as to be movable through the first guide means and the second guide means, and a traveling guide is provided that can travel along the weld line above the weld line of the welded portion. The shape is a hemispherical shape with a quarter of the lower side of the sphere cut out, and a spherical surface having a center on the first surface is provided at the upper part of the hemispherical travel guide, and the spherical surface is rotatable and engaged with the spherical surface. A traveling guide receiver having a recessed concave hemispherical surface that is detachably engaged is provided in the lower part of the manual laser welding head, and extends downward from the upper part of the hemispherical traveling guide along the second surface. An extending part is provided, and the distance between the second surface and the optical axis of the laser beam is set in the extending part. Section Possible said second guide means is provided, and the manual laser welding head the focal point of the laser beam is characterized by being set at the center of the spherical surface of the traveling guide.

In a manual laser welding head provided with a condensing means for condensing laser light, a ruler provided along the weld line of the butt weld where the first surface and the second surface of the material to be welded contact horizontally, A traveling guide is provided, which is movably engaged with a workpiece to be welded on either the first surface or the second surface via a guide means, and is capable of traveling along the weld line above the weld line, The shape of the traveling guide is a hemispherical shape in which approximately half of the lower side of the sphere is cut out, and a spherical surface having a center on the first surface or the second surface is provided on the upper portion of the hemispherical traveling guide, and the traveling guide is rotated on the spherical surface. A traveling guide receiver having a concave portion formed of a concave hemispherical surface that is movably and detachably engaged is provided at a lower portion of the manual laser welding head, and the focal point of the laser beam is set at the center of the spherical surface of the traveling guide. A manual laser welding head characterized by being set .

3. The manual laser welding head according to claim 1, wherein when the manual laser welding head is inclined to the traveling guide receiver, the traveling guide receiver and the material to be welded are prevented from interfering with each other. A manual laser welding head comprising a notch opened upward from the center of the traveling guide receiver .

2. The manual laser welding head according to claim 1, wherein the first guide means and the second guide means comprise rollers that are rotatably engaged with two outer surfaces in the vicinity of the welded portion of the welded material. Manual laser welding head .

3. The manual laser welding head according to claim 2, wherein the guide means comprises a roller that is rotatably engaged with the workpiece and the ruler.