JP2007118033A - Laser beam welding method and apparatus - Google Patents

Laser beam welding method and apparatus Download PDF

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Publication number
JP2007118033A
JP2007118033A JP2005313135A JP2005313135A JP2007118033A JP 2007118033 A JP2007118033 A JP 2007118033A JP 2005313135 A JP2005313135 A JP 2005313135A JP 2005313135 A JP2005313135 A JP 2005313135A JP 2007118033 A JP2007118033 A JP 2007118033A
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laser
workpiece
bed
welded
laser beam
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JP4688634B2 (en
Inventor
Takahiro Tanaka
孝宏 田中
Naomasa Shimoyama
直正 下山
Takayuki Murata
隆行 村田
Masaki Hirai
雅規 平井
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Kawasaki Heavy Industries Ltd
Kawaju Facilitech Co Ltd
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Kawasaki Heavy Industries Ltd
Kawaju Facilitech Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/035Aligning the laser beam
    • B23K26/037Aligning the laser beam by pressing on the workpiece, e.g. pressing roller foot

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser welding apparatus, wherein stable laser welding is possible by superposing, on a long and wide workpiece, another long workpiece with a mounting flange on both sides of a projected ridge and by surely pressurizing the mounting flange on both sides, and continuous welding is possible on the superposed workpieces in a surely and closely adhered state, free of deviation or the like in the upper workpiece. <P>SOLUTION: A bed 9 on which the lower workpiece W can be placed is installed on a base 2 and then, a portal frame 5 straddling over this bed 9 is arranged so that it can run along the longitudinal direction of the bed 9. A machining head 7 equipped with a laser head 71 and a holding roller 73 is installed so as to be movable laterally in the horizontal direction along the horizontal frame 51 of the portal frame 5 and also upward and downward in the vertical direction. A supporting frame 11 extended in the direction orthogonal to the horizontal frame 51 is arranged laterally movably in the horizontal direction along the horizontal frame 51. A pair of auxiliary rollers 8 are disposed downward to the bed 9 and also positioned in the supporting frame 11 in the manner that the lower end of the auxiliary rollers 8 horizontally rotates around the pivot in the upper part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、長尺の被溶接材(以下、ワークともいう)の、突起条の両側に長手方向に沿
って設けられた取付フランジを一方ずつ、下方の被溶接材(以下、ワークともいう)に対
して重ね合わせた状態で、レーザヘッドから照射されるレーザ光の焦点位置近傍に下端を位置させレーザ光線に臨む面が絞られたレーザ光に沿うよう傾斜させた押さえローラで押圧しながらレーザ光を照射して一直線状に移動させて溶接する方法と同溶接装置に関する。
In the present invention, a long welded material (hereinafter also referred to as a workpiece) is provided with one mounting flange provided along the longitudinal direction on both sides of the protrusion, and the lower welded material (hereinafter also referred to as a workpiece). In a state where the laser beam is superimposed on the laser beam, the lower end is positioned near the focal position of the laser beam emitted from the laser head, and the laser is pressed while being pressed by a pressing roller inclined so that the surface facing the laser beam is narrowed. The present invention relates to a method of welding by moving light in a straight line by irradiating light and the welding apparatus.

上記のようなレーザ溶接装置については既に知られており、また公用されている(例え
ば、特許文献1参照)が、この種のレーザ溶接装置により、例えば車両構体の側構体を製造する際に、断面が台形状や山形形状、コの字形状などの上向きに突出する突起条で、その両側の長手方向に沿って水平に延びる取付フランジを備えた長尺で細幅のワークを、例えば長尺の板状ワーク上に幅方向(長さ方向に対し直交する方向)に一定間隔で重ね合わ
せ、レーザ光を照射し一直線状に連続して接合する場合、上下のワークを多数のクランプ装置で締め付けて挟持することで、ワーク間に隙間が生じないようにできる。しかし、ワークの長手方向の中間部分においては、クランプ装置があるとレーザ光線による連続した溶接ができない。
The laser welding apparatus as described above is already known and is in public use (see, for example, Patent Document 1). For example, when manufacturing a side structure of a vehicle structure with this type of laser welding apparatus, Long and narrow workpieces with mounting flanges that extend horizontally along the longitudinal direction of both sides of the protrusions that protrude upward, such as trapezoidal, chevron-shaped, and U-shaped cross sections. When stacking on a plate-like workpiece in the width direction (direction perpendicular to the length direction) at regular intervals and irradiating with laser light to continuously join in a straight line, the upper and lower workpieces are clamped with a number of clamping devices So that there is no gap between the workpieces. However, continuous welding with a laser beam cannot be performed at the intermediate portion in the longitudinal direction of the workpiece if there is a clamping device.

そこで、従来は、例えば上下のワークのフランジ同士を重ね合わせてレーザ溶接により接合する場合、下側フランジの下面に対しフランジの長さ方向全体にわたって当接する受け台を設け、この受け台の受け面に載置された上側フランジの上面に沿って加圧ローラを下向きに押圧しながら移動させ、加圧ローラの当接部近傍に向けてレーザ光を照射して接合するレーザ溶接装置が提案されている(例えば、特許文献2参照)。   Therefore, conventionally, when, for example, the upper and lower workpiece flanges are overlapped and joined by laser welding, a cradle that is in contact with the lower surface of the lower flange over the entire length of the flange is provided. A laser welding apparatus has been proposed in which a pressure roller is moved while being pressed downward along the upper surface of an upper flange placed on the surface of the upper flange, and a laser beam is irradiated and joined toward the vicinity of the contact portion of the pressure roller. (For example, refer to Patent Document 2).

また、他の先行技術として、同様に上下のワークのフランジ同士を重ね合わせてレーザ溶接により接合する場合、両フランジの合わせ面とは反対側の各面にそれぞれ押し当てられることで両フランジを挟持しながら長さ方向に移動する上下の加圧ローラを設け、これらのうち一方の加圧ローラの移動に連動させ、加圧ローラの当接部近傍に向けてレーザ光を照射して接合するレーザ溶接装置が提案されている(例えば、特許文献3参照)。
特開2001−191191号公報(第2頁・第3頁および図2) 特開2004−358528号公報(第2頁〜第4頁および図1・図2) 特開2004−358529号公報(第2頁〜第5頁および図1〜図4)
As another prior art, when the upper and lower workpiece flanges are similarly overlapped and joined by laser welding, both flanges are clamped by being pressed against each surface opposite to the mating surface of both flanges. The upper and lower pressure rollers that move in the lengthwise direction are provided, and the laser is joined by irradiating laser light toward the contact portion of the pressure roller in conjunction with the movement of one of the pressure rollers. A welding apparatus has been proposed (see, for example, Patent Document 3).
Japanese Patent Laid-Open No. 2001-191191 (Pages 2 and 3 and FIG. 2) JP 2004-358528 A (pages 2 to 4 and FIGS. 1 and 2) JP 2004-358529 A (pages 2 to 5 and FIGS. 1 to 4)

上記したように長尺の、突起条の両側に沿って設けられたフランジを一方ずつ、下方の薄板状ワークともいうに対して重ね合わせた状態で、下方のワークの表面(合わせ面と反
対の面)にレーザー溶接痕が出ないように溶接する場合、通常は下方薄板状ワークの長手方向(正目)に沿ってレーザ光を照射し溶接すればよい。したがって、薄板状のワークの
長手方向に沿って突起条を備えた長尺のワークを配置し、突起条に隣接する両側のフランジのうち一方のフランジに沿ってレーザ光を照射して接合したのち、他方のフランジに沿ってレーザ光を照射して接合することになる。
As described above, the surface of the lower workpiece (opposite to the mating surface) with the flanges provided along both sides of the long protrusions overlapped with the lower thin plate-like workpiece one by one. When welding is performed so that no laser welding traces appear on the surface), the welding is usually performed by irradiating laser light along the longitudinal direction (mesh) of the lower thin plate workpiece. Therefore, after placing a long workpiece with protrusions along the longitudinal direction of the thin plate-shaped workpiece and joining it by irradiating laser light along one of the flanges on both sides adjacent to the protrusion Then, the laser beam is irradiated along the other flange for bonding.

しかし、突起条を備えたワークが通常5m以上の長尺になると、両端部を下方のワーク
に対しクランプ装置で挟持しただけでは、特許文献1に示すような、押さえローラをレーザヘッドに備えた加工ヘッドをもつレーザ溶接装置を用いて溶接する場合でも、ワーク間に隙間が生じ、溶接部が不完全になったり、ワークのフランジが上下に湾曲、つまり浮き上がった状態で溶接されたりする。さらに、ワークの一側方のフランジを下方の薄板状ワークに対し溶接した状態では、他側方のフランジの外縁側が下方のワークから浮き上がる(言い換えれば、跳ね上がる)ように上側のワークが傾斜し、溶接作業に支障を来すおそ
れがある。
However, when a workpiece having protrusions is usually longer than 5 m, the laser head is provided with a pressing roller as shown in Patent Document 1 just by clamping both ends of the workpiece to the lower workpiece with a clamping device. Even when welding is performed using a laser welding apparatus having a machining head, a gap is generated between the workpieces, the welded portion becomes incomplete, or the workpiece flange is bent up and down, that is, welded in a state of being lifted. Furthermore, in a state where the flange on one side of the workpiece is welded to the thin plate workpiece on the lower side, the upper workpiece is inclined so that the outer edge side of the flange on the other side is lifted (in other words, jumped up) from the lower workpiece. There is a risk of hindering the welding operation.

一方、突起条を備えたワークの長手方向の中間部をこれよりかなり広い幅を有する下方のワークに対し、多数のクランプ装置を用いて挟持することは困難な上に、仮にクランプ装置により上下のワーク同士を挟持することが可能であるとしても、長手方向に沿って存在するクランプ装置がレーザ光による一直線状に連続した溶接作業の妨げになって、円滑なレーザ溶接作業ができなくなる。   On the other hand, it is difficult to sandwich the workpiece in the longitudinal direction of the workpiece provided with the protrusions with the lower workpiece having a considerably wider width by using a large number of clamping devices. Even if the workpieces can be clamped, the clamping device existing along the longitudinal direction obstructs the welding operation that is continuously performed in a straight line by the laser beam, and the smooth laser welding operation cannot be performed.

また、特許文献2あるいは特許文献3に示すような、下側の受け台で下側のワークを受け上側の加圧ローラで上側のワークを押圧しながらレーザ溶接したり、あるいは上下の加圧ローラで上下のワークを挟持してレーザ溶接したりする装置では、下側のワークがかなり広い幅を有するために、受け台や下側の加圧ローラを上側に位置するワークの一方のフランジの長手方向に沿うように配置することが困難である。しかも、フランジは突起条の両側方に設けられているため、レーザヘッドの近傍に設けられる加圧ローラ、つまり突起条の片側の、レーザ溶接される側のフランジを押圧する加圧ローラだけでは、反対側のフランジを押圧できないために下側のワークから浮き上がった状態となって、精度の高い溶接作業が難しい。   Further, as shown in Patent Document 2 or Patent Document 3, the lower work is received by the lower cradle and laser welding is performed while pressing the upper work with the upper pressure roller, or the upper and lower pressure rollers. In an apparatus that sandwiches the upper and lower workpieces and performs laser welding, the lower workpiece has a fairly wide width, so the length of one flange of the workpiece with the cradle and lower pressure roller on the upper side is long. It is difficult to arrange it along the direction. Moreover, since the flanges are provided on both sides of the protrusion, only the pressure roller provided in the vicinity of the laser head, that is, the pressure roller for pressing the flange on the laser welding side on one side of the protrusion, Since the opposite flange cannot be pressed, it is in a state of being lifted from the lower workpiece, and high precision welding work is difficult.

さらに、本発明の対象とするレーザ溶接は、レーザヘッドの脇にレーザ光の焦点位置近傍をローラの下端で押圧する押さえローラを備えており、この押さえローラはレーザ光に対し突起条側に配置されレーザ光に臨む面が絞られたレーザ光に沿うよう傾斜しているので、上側のワーク(突起条を備えたワーク)に対しレーザ溶接されている側の取付フランジの外縁側方向へワークを移動させようとする力が作用するから、取付フランジの片側(
溶接する側)だけを押し付ける加圧ローラを備えたレーザ溶接装置では、下側のワークに対し上側の突起条を備えたワークが側方へずれを生じ、正規の溶接ラインに沿って正確な高精度のレーザ溶接ができなくなるおそれがある。
Further, the laser welding that is the subject of the present invention is provided with a pressing roller that presses the vicinity of the focal position of the laser beam with the lower end of the roller on the side of the laser head, and this pressing roller is arranged on the protrusion side with respect to the laser beam. Since the surface facing the laser beam is inclined so as to follow the narrowed laser beam, the workpiece is moved toward the outer edge side of the mounting flange on the laser welded side with respect to the upper workpiece (work having projections). Because the force to move is applied, one side of the mounting flange (
In a laser welding machine equipped with a pressure roller that presses only the welding side), the workpiece with the upper protrusion is displaced laterally with respect to the lower workpiece, and the exact height is increased along the regular welding line. There is a risk that accurate laser welding cannot be performed.

本発明は上述の点に鑑みなされたもので、長尺で突起条の両側に取付フランジを備えたワークを長尺で広幅のワーク上に重ね合せて接合する場合に、両側の取付フランジを確実に押圧して安定したレーザ溶接が可能で、上側ワークにずれ等が生じず、重ね合わせたワークを確実に密着させた状態で連続的に溶接できるレーザ溶接方法と同溶接装置を提供することを目的としている。   The present invention has been made in view of the above points, and when mounting a long workpiece having mounting flanges on both sides of the protrusion on a long and wide workpiece, the mounting flanges on both sides can be securely connected. To provide a laser welding method and a welding apparatus capable of performing stable laser welding by pressing onto the upper workpiece and continuously welding the upper workpiece without causing any deviation or the like so that the stacked workpieces are in close contact with each other. It is aimed.

上記の目的を達成するために本発明に係るレーザ溶接方法は、長尺(例えば5m以上)
の被溶接材の、突起条を挟んで両側長手方向に沿って設けられた取付フランジを一方ずつ、下方の被溶接材に対して重ね合わせた状態で、レーザヘッドから照射されるレーザ光の焦点位置近傍に下端を位置させレーザ光に臨む面が絞られたレーザ光に沿うよう傾斜させた押さえローラで押圧しながらレーザ光を照射して一直線状に移動させて溶接する方法であって、前記突起条を挟んで両側の取付フランジ上を走行可能な一対の補助ローラにより前記レーザヘッドの移動方向に対し前方または前後両方を押圧しながら、レーザ光を照射して溶接することを特徴とする。
In order to achieve the above object, the laser welding method according to the present invention is long (for example, 5 m or more).
The focus of the laser beam irradiated from the laser head in a state where one mounting flange provided along the longitudinal direction on both sides of the protrusion is overlapped with the lower material to be welded. A method of welding by moving a laser beam in a straight line while pressing with a pressing roller inclined so as to follow the laser beam whose surface facing the laser beam is narrowed in the vicinity of the position, A pair of auxiliary rollers capable of running on mounting flanges on both sides across the protrusions are welded by irradiating a laser beam while pressing both front and front and rear in the moving direction of the laser head.

上記構成を有する本発明のレーザ溶接方法によれば、レーザヘッドから照射されるレー
ザー光の焦点位置近傍を押さえローラで押圧するとともに、その少なくとも前方で突起条を挟んで両側の取付フランジ上を一対の補助ローラでそれぞれ押圧しながら溶接するので、上方のワークが長尺の細幅で軽量の小部品あっても同ワークが左右、特に押さえローラの下端側傾斜方向への位置ずれを生じず、上側ワークの両側各取付フランジはそれぞれ下側ワークに対し確実に押圧され密着状態で連続して接合される。また、レーザ光が照射される溶接部近傍のワークの平面度がより向上し、レーザヘッド脇の押さえローラによる押しつけが効果的に作用する。
According to the laser welding method of the present invention having the above-described configuration, the vicinity of the focal position of the laser beam irradiated from the laser head is pressed by the pressing roller, and a pair of mounting flanges on both sides are sandwiched at least in front of the protrusion. Because the upper workpiece is welded while being pressed by each of the auxiliary rollers, even if the upper workpiece is a long thin and lightweight small part, the workpiece does not shift in the left-right direction, particularly the lower end side inclined direction of the pressing roller, The mounting flanges on both sides of the upper work are reliably pressed against the lower work and continuously joined in close contact. Further, the flatness of the workpiece near the welded portion irradiated with the laser beam is further improved, and the pressing by the pressing roller beside the laser head effectively acts.

請求項2に記載のように、前記下方の被溶接材が長尺で広幅の薄板材からなり、この薄板材をベッド上に載置してほぼ全面にわたり前記ベッド側に吸着させた状態で、前記薄板材上に突起条の両側に取付フランジを備えた前記被溶接材を重ね合わせ、両側の前記取付フランジ上を一対の補助ローラにより前記レーザヘッドの移動方向に対し前方または前後両方を押圧しながらレーザ光を照射して溶接することが好ましい。   As described in claim 2, in the state in which the lower material to be welded is a long and wide thin plate material, and the thin plate material is placed on the bed and adsorbed to the bed side over the entire surface. The material to be welded provided with mounting flanges on both sides of the protrusion is superposed on the thin plate material, and both front and front and back are pressed against the moving direction of the laser head by a pair of auxiliary rollers on the mounting flanges on both sides. However, it is preferable to weld by irradiating with laser light.

このように構成することにより、下側の被溶接材である薄板材がベッド上にしっかりと保持され、同時に薄板材の平面度が全面にわたり保たれた状態で、上側に被溶接材が重ね合わされ、前方または前後両方の一対の補助ローラとレーザヘッド脇の押さえローラで押圧されて密着されつつ、取付フランジを長手方向に沿って全長にわたり連続して確実にレーザ溶接することができる。   By configuring in this way, the thin plate material, which is the lower material to be welded, is firmly held on the bed, and at the same time, the flatness of the thin plate material is maintained over the entire surface, and the material to be welded is superimposed on the upper side. The mounting flange can be laser-welded reliably and continuously over the entire length along the longitudinal direction while being pressed and intimately contacted by a pair of auxiliary rollers in front or both sides and a pressing roller beside the laser head.

本発明(請求項3)に係るレーザ溶接装置は、長尺の被溶接材の、突起条を挟んで両側長手方向に沿って設けられた取付フランジを一方ずつ、下方の被溶接材に対して重ね合わせた状態で、レーザヘッドから照射されるレーザ光の焦点位置近傍に下端を位置させレーザ光に臨む面が絞られたレーザ光に沿うよう傾斜させた押さえローラで押圧しながら前記レーザヘッドよりレーザ光を照射して一直線状に移動させて溶接する装置であって、前記突起条を挟んで両側の取付フランジ上を走行可能な一対の補助ローラを、前記レーザヘッドに対しその移動方向の前方および後方または前方に備えたことを特徴とする。   In the laser welding apparatus according to the present invention (Claim 3), the mounting flanges provided along the longitudinal direction on both sides of the protrusions of the long welded material are respectively attached to the lower welded material. In a superposed state, the lower end is positioned in the vicinity of the focal position of the laser light emitted from the laser head, and the surface facing the laser light is pressed by a pressing roller inclined so as to follow the narrowed laser light. A device for welding by moving a laser beam in a straight line, wherein a pair of auxiliary rollers capable of running on mounting flanges on both sides with the protrusions interposed therebetween are provided in front of the laser head in the moving direction. And provided at the rear or front.

上記構成を有する本発明のレーザ溶接装置によれば、請求項1に関する上記したとおりの作用と同様の作用を奏するほか、構造が簡単で、溶接作業についてもクランプ装置で間欠的に挟持するなどの煩雑な準備が不要である。   According to the laser welding apparatus of the present invention having the above-described configuration, the same action as described above with respect to claim 1 is achieved, the structure is simple, and the welding operation is intermittently clamped by the clamping device. No complicated preparation is required.

請求項4に記載のように、前記各補助ローラの側方断面(突起条に臨む側の断面)を、前記突起条の一側面断面形状に対応した形状に形成することが好ましい。   According to a fourth aspect of the present invention, it is preferable that a side cross section (a cross section on the side facing the protrusion) of each auxiliary roller is formed in a shape corresponding to a one-side cross-sectional shape of the protrusion.

このように構成することにより、突起条の断面形状の一部に歪みや変形などが発生している場合には、補助ローラの本体で形状を矯正することができるとともに、突起条の形状が異なるなどワークの種類に間違いがあった場合には、補助ローラの走行が妨げられるので、配材ミスをすぐに確認できる。   With this configuration, when distortion or deformation occurs in a part of the cross-sectional shape of the protrusion, the shape of the protrusion can be corrected while the shape of the auxiliary roller can be corrected. If there is a mistake in the type of workpiece, for example, the auxiliary roller will be prevented from traveling, so it will be possible to immediately check the distribution error.

請求項5に記載のように、前記一対の補助ローラの間隔を調整可能に構成することができる。   As described in claim 5, the distance between the pair of auxiliary rollers can be adjusted.

このように構成することにより、突起条の幅が異なるワークにも対応して使用できる。   By comprising in this way, it can be used corresponding to the workpiece | work from which the width | variety of a protrusion differs.

請求項6に記載のように、前記下方の被溶接材を載置可能なベッドをベース上に設置し、このベッドを跨ぐ門形フレームを、前記ベッドの長手方向に沿って走行可能に配設し、
前記レーザヘッドおよび押さえローラを備えた加工ヘッドを、前記門形フレームの水平フレーム部に沿って水平方向に横移動可能にかつ上下方向に昇降可能に設け、前記水平フレーム部に対し直交する方向に延設された支持フレームを前記水平フレーム部に沿って水
平方向に横移動可能に配設し、前記一対の補助ローラを、前記ベッドに向けて下向きに配置するとともに、前記支持フレームに前記補助ローラの下端側が上方の枢支部を中心に水平方向に旋回するように配備することができる。
As described in claim 6, a bed on which the lower material to be welded can be placed is installed on a base, and a portal frame straddling the bed is disposed so as to be able to travel along the longitudinal direction of the bed. And
A machining head including the laser head and a pressing roller is provided so as to be horizontally movable along the horizontal frame portion of the portal frame and vertically movable up and down, and in a direction perpendicular to the horizontal frame portion. The extended support frame is disposed so as to be horizontally movable along the horizontal frame portion, and the pair of auxiliary rollers are disposed downward toward the bed, and the auxiliary roller is disposed on the support frame. It is possible to arrange the lower end side of the base plate so as to turn in the horizontal direction around the upper pivot.

このように構成することにより、ベッド上に載置した上下の被溶接材を重ね合わせた状態でこれらを跨ぐように配置されている門形フレームをベッドの長手方向に走行させ、必要に応じて加工ヘッドを水平フレーム部に沿って横移動させ、上側被溶接材の取付フランジを下側被溶接材に補助ローラと押さえローラで押圧し密着させながら、連続するレーザ溶接を円滑に且つ効率よく遂行することができる。また、下側の被溶接材が幅方向に凹状あるいは凸状に湾曲している場合にでも、加工ヘッドおよび補助ローラを水平方向に所定角度だけ旋回させて傾動させることで、被溶接材の取付フランジに対し垂直にレーザ光を照射し、かつ垂直に補助ローラで押圧しながらレーザ溶接を連続して行うことができる。   By configuring in this way, the portal frame arranged so as to straddle the upper and lower materials to be welded placed on the bed is run in the longitudinal direction of the bed, and if necessary Performs continuous laser welding smoothly and efficiently while moving the machining head horizontally along the horizontal frame and pressing the upper welded material mounting flange against the lower welded material with the auxiliary roller and pressing roller. can do. In addition, even when the lower workpiece is curved concavely or convexly in the width direction, the workpiece head and the auxiliary roller are rotated by a predetermined angle in the horizontal direction and tilted to attach the workpiece. Laser welding can be continuously performed while irradiating a laser beam perpendicularly to the flange and pressing the flange vertically with an auxiliary roller.

請求項7に記載のように、前記ベッド上に一定の間隔をあけて被溶接材の吸着手段を配設することが好ましい。   According to a seventh aspect of the present invention, it is preferable to dispose the welded material suction means on the bed at a constant interval.

このように構成することで、下側の被溶接材がかなり広い幅を有し、且つ長尺であってもベッド上に確実に吸着し、全体にわたり平面度を保ちながら上下の被溶接材を密着状態で高精度のレーザ溶接を可能にする。   By configuring in this way, the lower material to be welded has a considerably wide width, and even if it is long, the material to be welded is surely adsorbed on the bed, and the upper and lower materials to be welded are maintained while maintaining flatness throughout. Enables high-precision laser welding in close contact.

本発明に係るレーザ溶接方法および同装置には、つぎのような優れた効果がある。   The laser welding method and apparatus according to the present invention have the following excellent effects.

レーザヘッドから照射されるレーザー光の焦点位置近傍を押さえローラで押圧するとともに、その少なくとも前方で突起条を挟んで両側の取付フランジ上を補助ローラでそれぞれ押圧しながら溶接するので、上方のワークが長尺であっても同ワークが左右、特に押さえローラの下端側傾斜方向への位置ずれが生じず、上側ワークの両側各取付フランジはそれぞれ下側ワークに密着状態で連続して接合される。また、レーザ光が照射される溶接部近傍のワークの平面度がより向上し、レーザヘッド脇の押さえローラによる押しつけが効果的である。しかも、装置の構造が簡単で、溶接作業についてもクランプ装置で間欠的に挟持するなどの煩雑な準備が不要である。   Since the vicinity of the focal position of the laser beam irradiated from the laser head is pressed with a pressing roller and welded while pressing on the mounting flanges on both sides with the auxiliary rollers sandwiching the protrusions at least in front, the upper workpiece is Even if it is long, the workpiece does not shift in the right and left direction, in particular, the lower end side inclination direction of the pressing roller, and the mounting flanges on both sides of the upper workpiece are continuously joined in close contact with the lower workpiece. In addition, the flatness of the workpiece near the welded portion irradiated with the laser light is further improved, and pressing with a pressing roller beside the laser head is effective. In addition, the structure of the device is simple, and complicated preparations such as intermittent clamping with a clamping device are not necessary for welding operations.

以下、本発明に係るレーザ溶接装置の実施の形態を図面に基づいて説明し、併せてレーザ溶接方法についても説明する。   Embodiments of a laser welding apparatus according to the present invention will be described below with reference to the drawings, and a laser welding method will also be described.

図1は本発明のレーザ溶接装置の実施例を全体的に示す正面図、図2は図1のレーザ溶接装置の側面図、図3は図1のレーザ溶接装置の平面図である。図4はベッド(定盤)の
平面図、図5は図4のベッド上に車両の側構体用ワークを載置してレーザ溶接作業前の状態を示す平面図である。図6は図2の一部を拡大して示す側面図、図7は図6の平面図、図8(a)は加工ヘッドを拡大して示す正面図、図8(b)は同側面図、図9(a)は補助ローラの正面図、図9(b)は補助ローラを水平方向に旋回させた状態の正面図である。
1 is a front view generally showing an embodiment of a laser welding apparatus of the present invention, FIG. 2 is a side view of the laser welding apparatus of FIG. 1, and FIG. 3 is a plan view of the laser welding apparatus of FIG. FIG. 4 is a plan view of a bed (surface plate), and FIG. 5 is a plan view showing a state before a laser welding operation is performed by placing a vehicle side structure work on the bed of FIG. 6 is a side view showing a part of FIG. 2 in an enlarged manner, FIG. 7 is a plan view of FIG. 6, FIG. 8A is a front view showing the processing head in an enlarged manner, and FIG. FIG. 9A is a front view of the auxiliary roller, and FIG. 9B is a front view of the auxiliary roller rotated in the horizontal direction.

図1〜図3に示すように、レーザ溶接装置1は車両の側構体製造用のベッド(定盤)9を備え、またベース2上に設置されたベッド9を挟んで両側のベース2上に軌道3が長手方向に沿って平行に敷設されている。軌道3上には、門形フレーム5が前後に車輪41を備えた走行部4を介して走行可能に配設されている。走行部4には、駆動用のサーボモータとテンションブレーキ(図示せず)とが配備されている。本例の場合、図5に示すように車両の側構体Xにおいて外板を構成する、窓部W1をあらかじめ開口した広幅で長尺の
幅方向に中間部が凹状にやや湾曲した薄板状ワークW上に、横骨部材を構成する、断面台形状からなる突起条w1の両側に取付フランジw2を備えた細幅で長尺のワークwを複数本、幅方向に間隔をあけ長手方向に沿って配置し、それぞれ両側の取付フランジw2を長手方向に連続してレーザ溶接し、さらに複数本のワークw上に跨って直交する方向に同一形態のワークw’をレーザ溶接して側構体Xが製造される。ベッド9上には、図4に示すように全体にわたり一定間隔で多数の吸着部(吸着手段)91が設けられ、また本例の場合、ワークWの窓部W1に対応した位置に開口部92を設けており、ベッド9上に載置されたワークWを窓部W1を開口部92に一致させた状態で吸着部91により一斉に吸引し、保持することができる。
As shown in FIGS. 1 to 3, the laser welding apparatus 1 is provided with a bed (surface plate) 9 for manufacturing a side structure of a vehicle, and on the bases 2 on both sides with the bed 9 installed on the base 2 interposed therebetween. The track 3 is laid in parallel along the longitudinal direction. On the track 3, a portal frame 5 is disposed so as to be able to travel via a traveling unit 4 having wheels 41 at the front and rear. The traveling unit 4 is provided with a driving servo motor and a tension brake (not shown). In the case of this example, as shown in FIG. 5, a thin plate-like workpiece W that constitutes an outer plate in the side structure X of the vehicle and has a wide and long width direction in which the window portion W1 is opened in advance and the middle portion is slightly curved in a concave shape in the width direction. On top, a plurality of narrow and long workpieces w having mounting flanges w2 on both sides of a protrusion w1 having a trapezoidal cross section constituting a transverse bone member, spaced in the width direction and along the longitudinal direction. The side structure X is manufactured by arranging and laser welding the mounting flanges w2 on both sides continuously in the longitudinal direction and laser welding the workpiece w ′ of the same shape in a direction perpendicular to the plurality of workpieces w. Is done. As shown in FIG. 4, a large number of suction portions (suction means) 91 are provided on the bed 9 at regular intervals throughout the whole. In this example, an opening 92 is provided at a position corresponding to the window portion W <b> 1 of the workpiece W. The work W placed on the bed 9 can be simultaneously sucked and held by the suction portion 91 with the window portion W1 aligned with the opening portion 92.

門形フレーム5の水平フレーム部51の上面には、加工ヘッド7がリニアガイド22を介して水平フレーム部51の上面に横方向に敷設されたガイドレール53に沿って横移動可能に配設されている。加工ヘッド7はリニアガイド22に対して水平旋回可能に基部が支持された多関節ロボットアーム23の先端に装着され、ロボットアーム23により昇降可能に、かつ水平移動可能に装着されている。   On the upper surface of the horizontal frame portion 51 of the portal frame 5, the processing head 7 is disposed so as to be laterally movable along a guide rail 53 laid laterally on the upper surface of the horizontal frame portion 51 via the linear guide 22. ing. The machining head 7 is mounted on the tip of an articulated robot arm 23 whose base is supported so as to be horizontally rotatable with respect to the linear guide 22, and is mounted so as to be movable up and down by the robot arm 23 and horizontally movable.

加工ヘッド7は、図8に示すようにレーザヘッド71と円盤状の押さえローラ73とを備えている。レーザヘッド71の先端(下端)には、レーザ光rをワークwに対し照射するレーザ出射部72を備えている。押さえローラ73はレーザーヘッド71の出射部72からワークwへ照射されるレーザ光rの焦点位置付近に下端が位置するよう、5〜10°傾斜させて回転可能にブラケット74に軸着されている。本例の場合、レーザヘッド71もブラケット74に支持され、ロボットアーム23の下端に鉛直軸線中心に回転する回転部材75を介してレーザヘッド71と押さえローラ73とが同一の姿勢を保って水平に旋回可能に装着されている。また、ブラケット74はシリンダ機構77を介して支持され、レーザー71と押さえローラ73は昇降可能である。回転部材75の上方には水平軸線中心に回転する枢支部76を備え、この枢支部76はロボットアーム23の下部に介設され、レーザヘッド71と押さえローラ73を同一姿勢で回転部材75ごと水平方向に旋回させられる。   The machining head 7 includes a laser head 71 and a disc-shaped pressing roller 73 as shown in FIG. At the tip (lower end) of the laser head 71, a laser emitting unit 72 for irradiating the workpiece w with the laser beam r is provided. The pressing roller 73 is pivotally mounted on the bracket 74 so as to be inclined at an angle of 5 to 10 ° so that the lower end is positioned in the vicinity of the focal position of the laser beam r irradiated from the emitting portion 72 of the laser head 71 to the workpiece w. . In the case of this example, the laser head 71 is also supported by the bracket 74, and the laser head 71 and the pressing roller 73 are maintained horizontally in the same posture through a rotating member 75 that rotates about the vertical axis at the lower end of the robot arm 23. It is mounted so that it can turn. The bracket 74 is supported via a cylinder mechanism 77, and the laser 71 and the pressing roller 73 can be raised and lowered. Above the rotating member 75, there is provided a pivot part 76 that rotates about the horizontal axis, and this pivot part 76 is interposed under the robot arm 23 so that the laser head 71 and the pressing roller 73 are horizontally placed together with the rotary member 75 in the same posture. Swiveled in the direction.

水平フレーム部51の下面にも横方向にガイドレール54が敷設され、このガイドレール54に沿って横移動可能にリニアガイド24を介して補助ローラ8の支持フレーム11が配設されている。支持フレーム11は、図3・図7に示すように平面視略「J」形からなり、水平フレーム部51に直交して前方へ延設されている。支持フレーム11の下面の前後(基端側と先端部)に、図6に示すように左右一対の補助ローラ8がそれぞれ設けられている。各補助ローラ本体81の側面は、図9に示すように上側ワークwの断面台形状の突起条w1の一側面に対応する断面に形成され、左右の補助ローラ8の間隔を突起条w1の幅に応じてシリンダ機構82で調整できるようになっている。一対の補助ローラ8は上下位置を調整可能にシリンダ機構83のピストンロッド84下端部に取り付けられるとともに、図9(b)のように一対の補助ローラ8が水平方向に旋回可能に、上方のシリンダ機構83が支持フレーム11の下面に固設されたブラケット12に支軸13により回転可能に軸着されている。これは、側構体XのワークWが水平部だけでなく、例えば長手方向に直交する方向に凹状の湾曲部を有する場合に、加工ヘッド7を回転部材76を介して水平方向に所定角度旋回させ、これに合わせて補助ローラ8も所定角度水平方向に旋回させた状態で使用するためである。つまり、レーザ溶接部(ワークw)の表面の傾きに応じて補助ローラ8が傾動するのを許容している。   A guide rail 54 is also laid in the lateral direction on the lower surface of the horizontal frame portion 51, and the support frame 11 of the auxiliary roller 8 is disposed via the linear guide 24 so as to be laterally movable along the guide rail 54. As shown in FIGS. 3 and 7, the support frame 11 has a substantially “J” shape in plan view, and extends forward perpendicular to the horizontal frame portion 51. As shown in FIG. 6, a pair of left and right auxiliary rollers 8 are provided on the front and rear (base end side and front end) of the lower surface of the support frame 11, respectively. The side surface of each auxiliary roller body 81 is formed in a cross section corresponding to one side surface of the protrusion w1 having a trapezoidal cross section of the upper work w as shown in FIG. 9, and the interval between the left and right auxiliary rollers 8 is the width of the protrusion w1. The cylinder mechanism 82 can be adjusted accordingly. The pair of auxiliary rollers 8 is attached to the lower end portion of the piston rod 84 of the cylinder mechanism 83 so that the vertical position can be adjusted, and the pair of auxiliary rollers 8 can turn in the horizontal direction as shown in FIG. A mechanism 83 is rotatably attached to a bracket 12 fixed to the lower surface of the support frame 11 by a support shaft 13. This is because, when the workpiece W of the side structure X has not only a horizontal part but also a concave curved part in a direction orthogonal to the longitudinal direction, for example, the machining head 7 is turned in the horizontal direction by a predetermined angle via the rotating member 76. In accordance with this, the auxiliary roller 8 is also used in a state where it is turned in a horizontal direction by a predetermined angle. That is, the auxiliary roller 8 is allowed to tilt according to the tilt of the surface of the laser welded part (work w).

以上のようにして本発明の実施例に係るレーザ溶接装置1が構成されるが、以下にそのレーザ溶接装置1を用いた溶接作業について説明する。   The laser welding apparatus 1 according to the embodiment of the present invention is configured as described above, and welding work using the laser welding apparatus 1 will be described below.

図4に示すベッド9上に、図5のように外板としてのワークWが載置され、複数の吸着
機構91によりワークWが窓部W1を開口部92に合わせた状態で保持される。この状態で、ワークW上には長手方向に沿って横骨部材としてのワークwが、幅方向に一定間隔で配置される。そして、ワークwの両側端部がクランプ装置93により下側のワークWに挟持して固定される。なお、ワークwと同一構造の縦骨部材が横骨部材としてのワークwに対し直交する方向に配置され、レーザ溶接されるが、それは横骨部材wが外板であるワークWにレーザ溶接により溶接されたのちである。
A workpiece W as an outer plate is placed on the bed 9 shown in FIG. 4, and the workpiece W is held by the plurality of suction mechanisms 91 with the window portion W <b> 1 aligned with the opening 92. In this state, on the workpiece W, workpieces w as transverse bone members are arranged along the longitudinal direction at regular intervals in the width direction. Then, both end portions of the workpiece w are clamped and fixed to the lower workpiece W by the clamp device 93. The longitudinal bone member having the same structure as that of the workpiece w is arranged in a direction orthogonal to the workpiece w as a transverse bone member and is laser-welded, but this is performed by laser welding to the workpiece W having the transverse bone member w as an outer plate. After being welded.

図5のように外板としてのワークW上に長尺の横骨部材としてのワークwが配置され、クランプ装置93で固定された状態(このとき、縦骨部材は配置されていない)で、門形フレーム5に配備されている加工ヘッド7の位置と傾斜角度が例えば第1(左端)のワークwの左側取付フランジw2の溶接ラインに沿って垂直にレーザヘッド71からレーザ光が照射されるように調整される。また、前後に一対の補助ローラ8を備えた支持フレーム1が水平フレーム部51下面を横移動し、各補助ローラ8の本体81がワークwの突起条w1を跨いで取付フランジw2上を走行するように位置調整される。このとき、ワークW端部(左端側および右端側)では内側に凸状に湾曲している場合があり、この場合には、ワークWの湾曲面に対し垂直にレーザヘッド71の出射部72から照射されるレーザ光が当たるように、また一対の補助ローラ8がそれぞれワークwの取付フランジw2上に対してローラ下端が垂直に当接されて走行するように、それぞれ上方の軸支部を中心に所定角度水平に旋回させて対応する。   In the state where the work w as a long transverse bone member is arranged on the work W as an outer plate as shown in FIG. 5 and fixed by the clamp device 93 (at this time, the longitudinal bone member is not arranged) The laser head 71 irradiates the laser beam perpendicularly along the welding line of the left mounting flange w2 of the first (left end) workpiece w, for example, with the position and the inclination angle of the machining head 7 arranged on the portal frame 5. To be adjusted. Further, the support frame 1 having a pair of auxiliary rollers 8 at the front and rear moves horizontally on the lower surface of the horizontal frame portion 51, and the main body 81 of each auxiliary roller 8 travels on the mounting flange w2 across the protrusion w1 of the workpiece w. The position is adjusted as follows. At this time, there are cases where the workpiece W ends (left end side and right end side) are curved inwardly, and in this case, from the emitting portion 72 of the laser head 71 perpendicular to the curved surface of the workpiece W. The pair of auxiliary rollers 8 are respectively centered on the upper shaft support portion so that the lower end of the rollers is brought into contact with the mounting flange w2 of the workpiece w vertically so that the irradiated laser light is applied. It responds by turning horizontally by a predetermined angle.

このようにして、加工ヘッド7および前後の一対の補助ローラ8の位置および水平旋回角度(鉛直方向あるいは鉛直方向に対し傾斜)を調整し、レーザヘッド71から照射されるレーザ光を突起条w1片側の取付フランジw2上の溶接ラインに当てるとともに、押さえローラ73にてワークwを下側ワークWに密着させる。同時に、押さえローラ73の前後の一対の補助ローラ8にてワークwの両側の取付フランジw2上を押圧しながら、レーザヘッド71の移動に伴って走行させる。これにより、上側のワークwはレーザ溶接部を中心にしてその前後が下側のワークW上に密着し、平面度も維持される。なお、下側のワークWについては、ベッド9の複数の吸着部91にて全面にわたり均一に吸引されているため、平面度が保たれている。この状態で、門形フレーム5は両側の軌道3に沿ってゆっくりと一定速度で前方へ移動し、ワークW上の所定位置(溶接予定ライン)上に一方の取付フランジw2が連続してレーザ溶接される。   In this way, the position and horizontal turning angle (vertical direction or tilt with respect to the vertical direction) of the processing head 7 and the pair of front and rear auxiliary rollers 8 are adjusted, and the laser beam emitted from the laser head 71 is projected on one side of the protrusion w1. The work w is brought into close contact with the lower work W by the pressing roller 73. At the same time, the pair of auxiliary rollers 8 before and after the pressing roller 73 is caused to travel along with the movement of the laser head 71 while pressing the mounting flanges w2 on both sides of the workpiece w. As a result, the upper workpiece w is in close contact with the lower workpiece W around the laser welding portion, and the flatness is maintained. In addition, since the lower workpiece | work W is attracted | sucked uniformly over the whole surface in the several adsorption | suction part 91 of the bed 9, flatness is maintained. In this state, the portal frame 5 slowly moves forward at a constant speed along the tracks 3 on both sides, and one mounting flange w2 is continuously laser-welded on a predetermined position (scheduled welding line) on the workpiece W. Is done.

そして、一方の取付フランジw2が溶接されると、加工ヘッド7が鉛直軸線を中心に回転部材を介して水平に回転し、レーザヘッド71と押さえローラ73は左右対称位置に変わる。ここで、他方の取付フランジw2上の溶接予定ラインとレーザヘッド71からのレーザ光照射位置とにずれがあれば、ロボットアーム23を介して水平移動してレーザヘッド71の位置が修正される。しかし、前後一対の補助ローラ8の位置は突起条w1の両側の取付フランジw2上にあり、通常は位置の調整は行われない。この状態で、門形フレーム5は両側の軌道3に沿ってゆっくりと一定速度で逆方向(後方)へ移動し、ワークW上の所定位置(溶接予定ライン)上に他方の取付フランジw2が連続してレーザ溶接される。こうして、ワークwの両側の取付フランジw2が連続してワークW上に溶接されると、レーザヘッド71と押さえローラ73はガイドレールに沿って、前後の補助ローラ8はガイドレールに沿って支持フレーム11とともにそれぞれ隣のワークwの位置へ水平に横移動する。このようにして、ワークW上に配置された全てのワークwがレーザ溶接される。また、レーザ溶接に際して前後一対の補助ローラ8が突起条w1両側の取付フランジw2を走行するので、仮に突起条w1の断面形状にわずかな変形がある場合には、変形部分は補助ローラ8によって矯正される。一方、突起条の断面形状が全く異なるワークを配置するなど、配材ミスがある場合には、補助ローラ8の走行が不能になるので、確実に確認できる。   When one mounting flange w2 is welded, the machining head 7 rotates horizontally around the vertical axis via the rotating member, and the laser head 71 and the pressing roller 73 are changed to the left-right symmetric position. Here, if there is a deviation between the planned welding line on the other mounting flange w2 and the laser light irradiation position from the laser head 71, the position of the laser head 71 is corrected by moving horizontally through the robot arm 23. However, the position of the pair of front and rear auxiliary rollers 8 is on the mounting flanges w2 on both sides of the protrusion w1, and the position is not normally adjusted. In this state, the portal frame 5 slowly moves in the reverse direction (rearward) along the track 3 on both sides at a constant speed, and the other mounting flange w2 continues on a predetermined position (scheduled welding line) on the workpiece W. And laser welding. Thus, when the mounting flanges w2 on both sides of the workpiece w are continuously welded onto the workpiece W, the laser head 71 and the pressing roller 73 are along the guide rail, and the front and rear auxiliary rollers 8 are along the guide rail. 11 and move horizontally to the position of the adjacent workpiece w. In this way, all the workpieces w arranged on the workpiece W are laser-welded. In addition, since the pair of front and rear auxiliary rollers 8 run on the mounting flanges w2 on both sides of the protrusion w1 during laser welding, if the cross-sectional shape of the protrusions w1 is slightly deformed, the deformed portion is corrected by the auxiliary rollers 8. Is done. On the other hand, when there is a material distribution mistake such as disposing a workpiece having a completely different cross-sectional shape of the protrusions, the auxiliary roller 8 cannot travel, so that it can be confirmed reliably.

なお、横骨部材としての複数本のワークw上に跨って縦骨部材としてのワークw’をレーザ溶接する場合には、溶接跡が外板としてのワークWの表面には出ないので、通常はスポット溶接などによりワークw’をワークw上に仮止めし、補助ローラ8を使用せずに加工ヘッド7を門形フレーム5の水平フレーム部51のガイドレール54に沿って移動させながら、押さえローラ73でワークw’の取付フランジw2を押圧しつつ、レーザヘッド71からレーザ光を照射して一定間隔をあけて一定距離連続してレーザ溶接する。   When laser welding a workpiece w ′ as a longitudinal bone member over a plurality of workpieces w as horizontal bone members, since the welding mark does not appear on the surface of the workpiece W as an outer plate, Temporarily holds the workpiece w ′ on the workpiece w by spot welding or the like, and moves the machining head 7 along the guide rail 54 of the horizontal frame portion 51 of the portal frame 5 without using the auxiliary roller 8. While pressing the mounting flange w2 of the workpiece w ′ with the roller 73, laser welding is performed from the laser head 71, and laser welding is performed continuously at a constant interval.

上記に本発明のレーザ溶接装置1について実施例を挙げてレーザ溶接方法とともに説明したが、つぎのように実施することもできる。   Although the laser welding apparatus 1 of the present invention has been described above together with the laser welding method using examples, it can also be implemented as follows.

・ 門形フレーム5に配備する加工ヘッド7および補助ローラ8の支持フレーム11は
1台に限るものではなく、複数台にすることもできる。
The number of the processing heads 7 and the supporting frames 11 of the auxiliary rollers 8 provided on the portal frame 5 is not limited to one, and a plurality of them can be used.

・補助ローラ8はワークwの両側の取付フランジw2上を走行するように左右に一対必要であるが、レーザヘッド71(加工ヘッド7)の前後ではなく、前方にだけ配置してもよい。ただし、加工ヘッド7の前方にだけ配置する場合には、ベッド9の長手方向に沿って加工ヘッド7を往復させてレーザ溶接する場合には、溶接方向を変換する際に一対の補助ローラ8を加工ヘッド7に対し門形フレーム5の水平フレーム部51に直交する方向に移動させるか、加工ヘッド7をロボットアーム23などのより一対の補助ローラ8に対し移動させるかする必要がある。   A pair of auxiliary rollers 8 are necessary on the left and right so as to run on the mounting flanges w2 on both sides of the workpiece w, but they may be arranged only in front of the laser head 71 (processing head 7) instead of before and after. However, when the welding head is disposed only in front of the machining head 7 and laser welding is performed by reciprocating the machining head 7 along the longitudinal direction of the bed 9, the pair of auxiliary rollers 8 are provided when changing the welding direction. It is necessary to move the machining head 7 in a direction perpendicular to the horizontal frame 51 of the portal frame 5 or to move the machining head 7 relative to the pair of auxiliary rollers 8 such as the robot arm 23.

・上記実施例では車両の側構体Xを製作する場合について説明したが、側構体以外の部材、例えば屋根構体を製作することも可能である。   In the above embodiment, the case where the side structure X of the vehicle is manufactured has been described. However, it is possible to manufacture a member other than the side structure, for example, a roof structure.

本発明のレーザ溶接装置の実施例を全体的に示す正面図である。It is a front view which shows the Example of the laser welding apparatus of this invention generally. 図1のレーザ溶接装置の側面図である。It is a side view of the laser welding apparatus of FIG. 図1のレーザ溶接装置の平面図である。It is a top view of the laser welding apparatus of FIG. ベッド(定盤)9の平面図である。3 is a plan view of a bed (surface plate) 9. FIG. 図4のベッド9上に車両の側構体用ワークを載置してレーザ溶接作業前の状態を示す平面図である。FIG. 5 is a plan view showing a state before a laser welding operation by placing a vehicle side structure work on the bed 9 of FIG. 4. 図2の一部を拡大して示す側面図である。It is a side view which expands and shows a part of FIG. 図6の平面図である。FIG. 7 is a plan view of FIG. 6. 図8(a)は加工ヘッド7を拡大して示す正面図、図8(b)は同側面図である。FIG. 8A is an enlarged front view showing the processing head 7, and FIG. 8B is a side view thereof. 図9(a)は補助ローラ8の正面図、図9(b)は補助ローラ8を水平方向に旋回させた状態の正面図である。FIG. 9A is a front view of the auxiliary roller 8, and FIG. 9B is a front view of the auxiliary roller 8 rotated in the horizontal direction.

符号の説明Explanation of symbols

1…レーザ溶接装置
2…ベース
3…軌道
4…走行部
5…門形フレーム
7…加工ヘッド
8…補助ローラ
9…ベッド(定盤)
11…支持フレーム
12…ブラケット
13…支軸
22…リニアガイド
23…ロボットアーム
51…水平フレーム部
53…ガイドレール
71…レーザヘッド
72…レーザ出射部
73…押さえローラ
74…ブラケット
75…回転部材
76…枢支部材
77…シリンダ機構
82・83…シリンダ機構
84…ピストンロッド
91…吸着部(吸着手段)
92 …開口部
93…クランプ装置
X…側構体
w・w’…上側ワーク(被溶接材)
w1…突起条
w2…取付フランジ
W…下側ワーク(被溶接材)
W1…窓部
DESCRIPTION OF SYMBOLS 1 ... Laser welding apparatus 2 ... Base 3 ... Track | orbit 4 ... Traveling part 5 ... Portal frame 7 ... Processing head 8 ... Auxiliary roller 9 ... Bed (surface plate)
DESCRIPTION OF SYMBOLS 11 ... Support frame 12 ... Bracket 13 ... Support shaft 22 ... Linear guide 23 ... Robot arm 51 ... Horizontal frame part 53 ... Guide rail 71 ... Laser head 72 ... Laser emission part 73 ... Pressing roller 74 ... Bracket 75 ... Rotating member 76 ... Pivot member 77 ... Cylinder mechanism 82/83 ... Cylinder mechanism 84 ... Piston rod 91 ... Suction part (suction means)
92 ... Opening 93 ... Clamping device X ... Side structure w · w '... Upper work (material to be welded)
w1 ... Projection strip w2 ... Mounting flange W ... Lower workpiece (material to be welded)
W1 Window part

Claims (7)

長尺の被溶接材の、突起条を挟んで両側長手方向に沿って設けられた取付フランジを一方ずつ、下方の被溶接材に対して重ね合わせた状態で、レーザヘッドから照射されるレーザ光の焦点位置近傍に下端を位置させレーザ光に臨む面が絞られたレーザ光に沿うよう傾斜させた押さえローラで押圧しながらレーザ光を照射して一直線状に移動させて溶接する方法であって、
前記突起条を挟んで両側の取付フランジ上を走行可能な一対の補助ローラにより前記レーザヘッドの移動方向に対し前方または前後両方を押圧しながら、レーザ光を照射して溶接することを特徴とするレーザ溶接方法。
Laser light emitted from the laser head in a state where one mounting flange provided along the longitudinal direction on both sides of the protrusion is sandwiched on the lower material to be welded. The laser beam is irradiated and moved in a straight line while being pressed by a pressing roller inclined so as to follow the laser beam whose surface facing the laser beam is narrowed in the vicinity of the focal position. ,
A pair of auxiliary rollers capable of running on both mounting flanges with the protrusions interposed therebetween are welded by irradiating a laser beam while pressing both the front and front and rear in the moving direction of the laser head. Laser welding method.
前記下方の被溶接材が長尺で広幅の薄板材からなり、この薄板材をベッド上に載置してほぼ全面にわたり前記ベッド側に吸着させた状態で、前記薄板材上に突起条の両側に取付フランジを備えた前記被溶接材を重ね合わせ、両側の前記取付フランジ上を一対の補助ローラにより前記レーザヘッドの移動方向に対し前方または前後両方を押圧しながらレーザ光を照射して溶接することを特徴とする請求項1記載のレーザ溶接方法。   The lower material to be welded is made of a long and wide thin plate material, and the thin plate material is placed on the bed and is adsorbed to the bed side over almost the entire surface. The workpieces having mounting flanges are superposed on each other, and welding is performed by irradiating laser beams on the mounting flanges on both sides while pressing both the front and front and rear with respect to the moving direction of the laser head by a pair of auxiliary rollers. The laser welding method according to claim 1. 長尺の被溶接材の、突起条を挟んで両側長手方向に沿って設けられた取付フランジを一方ずつ、下方の被溶接材に対して重ね合わせた状態で、レーザヘッドから照射されるレーザ光の焦点位置近傍に下端を位置させレーザ光に臨む面が絞られたレーザ光に沿うよう傾斜させた押さえローラで押圧しながら前記レーザヘッドよりレーザ光を照射して一直線状に移動させて溶接する装置であって、
前記突起条を挟んで両側の取付フランジ上を走行可能な一対の補助ローラを、前記レーザヘッドに対しその移動方向の前方および後方または前方に備えたことを特徴とするレーザ溶接装置。
Laser light emitted from the laser head in a state where one mounting flange provided along the longitudinal direction on both sides of the protrusion is sandwiched on the lower material to be welded. A laser beam is irradiated from the laser head while being pressed by a pressing roller inclined so as to follow the laser beam whose surface facing the laser beam is narrowed near the focal position of the laser beam, and is welded. A device,
A laser welding apparatus, comprising: a pair of auxiliary rollers capable of running on mounting flanges on both sides with the protrusions interposed therebetween, in front of, behind, or in front of the laser head in the moving direction.
前記各補助ローラの側方断面を、前記突起条の一側面断面形状に対応した形状に形成したことを特徴とする請求項3記載のレーザ溶接装置。   4. The laser welding apparatus according to claim 3, wherein a side cross section of each auxiliary roller is formed in a shape corresponding to one side cross-sectional shape of the protrusion. 前記一対の補助ローラの間隔を調整可能に構成したことを特徴とする請求項3又は4記載のレーザ溶接装置。   The laser welding apparatus according to claim 3 or 4, wherein an interval between the pair of auxiliary rollers is adjustable. 前記下方の被溶接材を載置可能なベッドをベース上に設置し、このベッドを跨ぐ門形フレームを、前記ベッドの長手方向に沿って走行可能に配設し、
前記レーザヘッドおよび押さえローラを備えた加工ヘッドを、前記門形フレームの水平フレーム部に沿って水平方向に横移動可能にかつ上下方向に昇降可能に設け、
前記水平フレーム部に対し直交する方向に延設された支持フレームを前記水平フレーム部に沿って水平方向に横移動可能に配設し、
前記一対の補助ローラを、前記ベッドに向けて下向きに配置するとともに、前記支持フレームに前記補助ローラの下端側が上方の枢支部を中心に水平方向に旋回するように配備したことを特徴とする請求項3〜5のいずれか記載のレーザ溶接装置。
A bed on which the lower material to be welded can be placed is installed on a base, and a portal frame that straddles the bed is disposed so as to be able to travel along the longitudinal direction of the bed,
A machining head including the laser head and a pressing roller is provided so as to be horizontally movable along the horizontal frame portion of the portal frame and to be vertically movable.
A support frame extending in a direction orthogonal to the horizontal frame portion is disposed so as to be horizontally movable along the horizontal frame portion,
The pair of auxiliary rollers are arranged downward toward the bed, and are arranged on the support frame so that a lower end side of the auxiliary rollers pivots in a horizontal direction around an upper support portion. Item 6. The laser welding apparatus according to any one of Items 3 to 5.
前記ベッド上に一定の間隔をあけて被溶接材の吸着手段を配設したことを特徴とする請求項6記載のレーザ溶接装置。   The laser welding apparatus according to claim 6, wherein means for adsorbing materials to be welded is disposed on the bed at a predetermined interval.
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CN105149839A (en) * 2015-09-10 2015-12-16 南车二七车辆有限公司 Draft sill fish web pressing device for railway freight car
CN113751903A (en) * 2021-09-27 2021-12-07 北京工业大学 Laser rolling welding-following device
CN114273778A (en) * 2021-12-16 2022-04-05 佛山汇百盛激光科技有限公司 Full-automatic involution laser welding equipment
CN115026442A (en) * 2022-07-01 2022-09-09 深圳市青虹激光科技有限公司 High-speed laser board separator
CN115026442B (en) * 2022-07-01 2023-03-21 深圳市青虹激光科技有限公司 High-speed laser board separator

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