JP6324776B2

JP6324776B2 - Laser welding structure of metal plate laminate, vehicle door sash provided with laser welding structure of metal plate laminate, laser welding method of metal plate laminate, and vehicle door sash using laser welding method of metal plate laminate Manufacturing method

Info

Publication number: JP6324776B2
Application number: JP2014054390A
Authority: JP
Inventors: 敦郎野田
Original assignee: Shiroki Corp
Current assignee: Shiroki Corp
Priority date: 2014-03-18
Filing date: 2014-03-18
Publication date: 2018-05-16
Anticipated expiration: 2034-03-18
Also published as: JP2015174132A

Description

本発明は金属板積層体のレーザ溶接構造、金属板積層体のレーザ溶接構造を備えた車両用ドアサッシュ、金属板積層体のレーザ溶接方法、及び金属板積層体のレーザ溶接方法を用いた車両用ドアサッシュの製造方法に関する。 The present invention relates to a laser welding structure for a metal plate laminate, a vehicle door sash having a laser welding structure for a metal plate laminate, a laser welding method for the metal plate laminate, and a vehicle using the laser welding method for the metal plate laminate. The present invention relates to a method for manufacturing a door sash.

特許文献１は車両ドアを開示している。この車両ドアは、金属製のドアパネルと、ドアパネルに固定した金属製のドアサッシュと、ドアパネルに対して上下方向にスライド自在に支持したドアガラスと、を具備している。 Patent document 1 is disclosing the vehicle door. The vehicle door includes a metal door panel, a metal door sash fixed to the door panel, and a door glass that is slidably supported in the vertical direction with respect to the door panel.

このドアサッシュは、母材となる金属板をロール成形することにより成形するのが一般的である。
ドアサッシュの断面形状は複雑であり、その一部は三枚の金属板を積層した構造となっている。しかしロール成形によってドアサッシュの形状を確定させた時点では、これら三枚の金属板は互いに接触しているだけであり、従って当該部分の機械的強度は脆弱である。
そのため特許文献１では、ロール成形によってドアサッシュの形状を確定させ後に、当該三枚の金属板どうしをレーザ溶接によって互いに固定している。 This door sash is generally formed by roll forming a metal plate as a base material.
The cross-sectional shape of the door sash is complicated, and a part thereof has a structure in which three metal plates are laminated. However, when the shape of the door sash is determined by roll forming, these three metal plates are only in contact with each other, and therefore the mechanical strength of the portion is weak.
Therefore, in Patent Document 1, after the shape of the door sash is determined by roll forming, the three metal plates are fixed to each other by laser welding.

特開２０１３−１９９２７５号公報JP 2013-199275 A

三枚の金属板（二枚の外側金属板とその間に位置する中間金属板）をレーザ溶接する場合は、搬送装置によって三枚の金属板（ドアサッシュ）を所定の方向に移送しながら、一方の外側金属板の表面側から他方の外側金属板側に向けてレーザ光をその強度を調整しながら照射するのが一般的である。
仮にレーザ溶接部（レーザ光）が、上記一方の外側金属板と中間金属板に対してのみ施され上記他方の外側金属板に到達しない場合は、中間金属板と他方の外側金属板が分離してしまう。その一方で、他方の外側金属板の表面にまでレーザ溶接部が到達すると、他方の外側金属板の表面には溶接による凹凸形状が形成される。しかし、他方の外側金属板の表面にこのような凹凸形状が形成されると、ドアサッシュの見栄えが低下したり、他方の外側金属板の表面に対する装着物（例えばウェザーストリップなど）が傷つくおそれがある（なお、レーザ光の入射面である一方の外側金属板の表面にも凹凸形状が形成されるが、この凹凸形状は比較的微細なので問題にはならない）。 When laser welding three metal plates (two outer metal plates and an intermediate metal plate positioned between them), the three metal plates (door sashes) are transported in a predetermined direction by the conveyor. In general, laser light is irradiated from the surface side of the outer metal plate toward the other outer metal plate side while adjusting the intensity thereof.
If the laser weld (laser beam) is applied only to the one outer metal plate and the intermediate metal plate and does not reach the other outer metal plate, the intermediate metal plate and the other outer metal plate are separated. End up. On the other hand, when the laser weld reaches the surface of the other outer metal plate, an uneven shape by welding is formed on the surface of the other outer metal plate. However, if such a concavo-convex shape is formed on the surface of the other outer metal plate, the appearance of the door sash may be deteriorated, or an attachment (for example, a weather strip) on the surface of the other outer metal plate may be damaged. There is a concavo-convex shape on the surface of one outer metal plate, which is the laser light incident surface, but this concavo-convex shape is relatively fine and does not matter.

そのため三枚の金属板に対してレーザ溶接を行う際は、レーザ光が中間金属板を貫通して他方の外側金属板の内部に到達する一方で他方の外側金属板の表面には到達しないようにレーザ溶接を行う必要がある。
このようなレーザ溶接を実現するためには、搬送装置による三枚の金属板（ドアサッシュ）の移送速度とレーザ光の強度が所定の関係となるように、移送速度及びレーザ光の強度を正確に設定する必要がある。
しかしレーザ光の強度を正確に微調整することは決して容易ではない。
さらに、搬送装置による移送速度が一定でない場合があり（断続的に速度を変える場合があり）、この場合に移送速度の変化に合わせてレーザ光の強度を的確に微調整するのは非常に難しい。 Therefore, when laser welding is performed on the three metal plates, the laser beam passes through the intermediate metal plate and reaches the inside of the other outer metal plate, but does not reach the surface of the other outer metal plate. It is necessary to perform laser welding.
In order to realize such laser welding, the transfer speed and the intensity of the laser light are accurately adjusted so that the transfer speed of the three metal plates (door sashes) by the transfer device and the intensity of the laser light have a predetermined relationship. Must be set to
However, it is not easy to precisely fine tune the intensity of the laser beam.
Furthermore, the transfer speed by the transfer device may not be constant (the speed may be changed intermittently), and in this case, it is very difficult to finely adjust the intensity of the laser light in accordance with the change in the transfer speed. .

本発明は、三枚以上の金属板からなる積層体をレーザ溶接部が貫通しない態様で容易に固定することが可能な金属板積層体のレーザ溶接構造、金属板積層体のレーザ溶接構造を備えた車両用ドアサッシュ、金属板積層体のレーザ溶接方法、及び金属板積層体のレーザ溶接方法を用いた車両用ドアサッシュの製造方法を提供することを目的とする。 The present invention includes a laser welded structure of a metal plate laminate and a laser welded structure of the metal plate laminate capable of easily fixing a laminate made of three or more metal plates in a mode in which the laser weld does not penetrate. Another object of the present invention is to provide a vehicle door sash, a method for laser welding a metal plate laminate, and a method for manufacturing a vehicle door sash using a laser welding method for a metal plate laminate.

本発明の金属板積層体のレーザ溶接構造は、第一外側金属板と、第二外側金属板と、上記第一外側金属板と上記第二外側金属板との間に位置し上記第一外側金属板及び上記第二外側金属板と積層体を構成する複数の中間金属板と、上記第一外側金属板の表面側から施した、上記中間金属板に到達しかつ上記第二外側金属板の表面には到達しない第一レーザ溶接部と、上記第二外側金属板の表面側から施した、上記中間金属板に到達しかつ上記第一外側金属板の表面には到達しない第二レーザ溶接部と、を備え、上記第一レーザ溶接部及び上記第二レーザ溶接部が共通の上記中間金属板に到達していることを特徴としている。 The laser welding structure of the metal plate laminate of the present invention includes a first outer metal plate, a second outer metal plate, and the first outer metal plate positioned between the first outer metal plate and the second outer metal plate. A metal plate and a plurality of intermediate metal plates constituting a laminate with the second outer metal plate, and a surface of the first outer metal plate, reaching the intermediate metal plate and of the second outer metal plate; A first laser weld that does not reach the surface and a second laser weld that is applied from the surface side of the second outer metal plate and reaches the intermediate metal plate and does not reach the surface of the first outer metal plate The first laser welded part and the second laser welded part reach the common intermediate metal plate .

上記第一レーザ溶接部及び上記第二レーザ溶接部が、全体として線状に延びるスピン溶接であってもよい。 The first laser welding portion and the second laser welding portion may be spin welding extending linearly as a whole.

本発明の金属板積層体のレーザ溶接構造を備えた車両用ドアサッシュは、第一外側金属板と、第二外側金属板と、上記第一外側金属板と上記第二外側金属板との間に位置し上記第一外側金属板及び上記第二外側金属板と積層体を構成する中間金属板と、上記第一外側金属板の表面側から施した、上記中間金属板に到達しかつ上記第二外側金属板の表面には到達しない第一レーザ溶接部と、上記第二外側金属板の表面側から施した、上記中間金属板に到達しかつ上記第一外側金属板の表面には到達しない第二レーザ溶接部と、を備え、上記第一外側金属板、上記第二外側金属板、及び上記中間金属板が、車両ドアのドアサッシュの一部を構成することを特徴としている。 The vehicle door sash provided with the laser welding structure of the metal plate laminate of the present invention includes a first outer metal plate, a second outer metal plate, and the first outer metal plate and the second outer metal plate. The first outer metal plate and the intermediate metal plate constituting the laminate with the second outer metal plate, and the intermediate metal plate applied from the surface side of the first outer metal plate and reaching the intermediate metal plate The first laser weld that does not reach the surface of the two outer metal plates and the intermediate metal plate that is applied from the surface side of the second outer metal plate and does not reach the surface of the first outer metal plate A second laser welded portion, wherein the first outer metal plate, the second outer metal plate, and the intermediate metal plate constitute a part of a door sash of a vehicle door .

本発明の金属板積層体のレーザ溶接方法は、第一外側金属板と、第二外側金属板と、上記第一外側金属板と上記第二外側金属板との間に位置し上記第一外側金属板及び上記第二外側金属板と積層体を構成する複数の中間金属板と、を備える金属板積層体どうしをレーザ溶接する方法であって、上記第一外側金属板の表面側から上記第二外側金属板側に向けて、上記中間金属板に到達しかつ上記第二外側金属板の表面には到達しない第一レーザ溶接部を施すステップ、及び上記第二外側金属板の表面側から上記第一外側金属板側に向けて、上記中間金属板に到達しかつ上記第一外側金属板の表面には到達しない第二レーザ溶接部を施すステップ、を有し、上記第一レーザ溶接部及び上記第二レーザ溶接部が共通の上記中間金属板に到達していることを特徴としている。 The method for laser welding a metal plate laminate of the present invention includes a first outer metal plate, a second outer metal plate, and the first outer metal plate positioned between the first outer metal plate and the second outer metal plate. A metal plate and a plurality of intermediate metal plates constituting the laminate with the second outer metal plate, and a method of laser welding metal plate laminates, wherein the first from the surface side of the first outer metal plate A step of applying a first laser welding portion that reaches the intermediate metal plate and does not reach the surface of the second outer metal plate toward the second outer metal plate, and the surface side of the second outer metal plate; toward the first outer metal sheet side, the reach to the intermediate metal plate and the step of the surface of the first outer metal sheet subjected to a second laser weld not reach, have a, the first laser weld, and the second laser weld that has reached the common of the intermediate metal plate It is characterized by a door.

本発明の金属板積層体のレーザ溶接方法を用いた車両用ドアサッシュの製造方法は、第一外側金属板と、第二外側金属板と、上記第一外側金属板と上記第二外側金属板との間に位置し上記第一外側金属板及び上記第二外側金属板と積層体を構成する中間金属板と、を備える金属板積層体どうしをレーザ溶接する方法であって、上記第一外側金属板の表面側から上記第二外側金属板側に向けて、上記中間金属板に到達しかつ上記第二外側金属板の表面には到達しない第一レーザ溶接部を施すステップ、及び上記第二外側金属板の表面側から上記第一外側金属板側に向けて、上記中間金属板に到達しかつ上記第一外側金属板の表面には到達しない第二レーザ溶接部を施すステップ、を有し、上記第一外側金属板、上記第二外側金属板、及び上記中間金属板が、車両ドアのドアサッシュの一部を構成することを特徴としている。 The manufacturing method of the vehicle door sash using the laser welding method of the metal plate laminate of the present invention includes a first outer metal plate, a second outer metal plate, the first outer metal plate, and the second outer metal plate. A metal plate laminate including the first outer metal plate and the intermediate metal plate constituting the laminate with the first outer metal plate, and the first outer metal plate. Applying a first laser weld that reaches the intermediate metal plate and does not reach the surface of the second outer metal plate from the surface side of the metal plate toward the second outer metal plate side, and the second Applying a second laser weld that reaches the intermediate metal plate and does not reach the surface of the first outer metal plate from the surface side of the outer metal plate toward the first outer metal plate. the first outer metal plate, the second outer metal plates, and in the Metal plate, and characterized in that it constitutes a part of a door sash of the vehicle door.

上記ドアサッシュをロール成形により構成し、上記第一レーザ溶接部及び上記第二レーザ溶接部を上記ロール成形中に行ってもよい。 The door sash may be formed by roll forming, and the first laser weld and the second laser weld may be performed during the roll forming.

請求項１、５の発明は、第一外側金属板と第二外側金属板との間に複数の中間金属板を介在させ、第一外側金属板の表面側から第二外側金属板側に向けて共通の中間金属板に到達する第一レーザ溶接部を施し、かつ、第二外側金属板の表面側から第一外側金属板側に向けて中間金属板に到達する第二レーザ溶接部を施すものである。
このように積層体の両面側からそれぞれレーザ溶接を行う場合は、各レーザ溶接部は共通の中間金属板にまで到達すればよく、レーザ溶接の入射側と反対側の外側金属板の内部にまでレーザ溶接部を到達させる必要がない。
そのため、中間金属板が複数の場合であっても、積層体をレーザ光が貫通しない態様で積層体を容易に固定することが可能になる。
さらにレーザ溶接を用いているので、積層体を（アーク溶接等と比べて）容易に溶接することが可能である。 According to the first and fifth aspects of the present invention, a plurality of intermediate metal plates are interposed between the first outer metal plate and the second outer metal plate, from the surface side of the first outer metal plate toward the second outer metal plate side. A first laser weld that reaches the common intermediate metal plate and a second laser weld that reaches the intermediate metal plate from the surface side of the second outer metal plate toward the first outer metal plate. Is.
Thus, when performing laser welding from both sides of the laminate, each laser weld has only to reach a common intermediate metal plate, and to the inside of the outer metal plate on the side opposite to the incident side of laser welding. There is no need to reach the laser weld.
Therefore, even if there are a plurality of intermediate metal plates, it is possible to easily fix the laminate in a manner in which the laser beam does not penetrate the laminate.
Furthermore, since laser welding is used, the laminate can be easily welded (compared to arc welding or the like).

請求項３、７の発明のように構成すると、第一外側金属板、中間金属板、及び第二外側金属板をより強固に固定できるようになる。 According to the third and seventh aspects of the invention, the first outer metal plate, the intermediate metal plate, and the second outer metal plate can be more firmly fixed.

請求項２、４、６の発明によれば、金属製のドアサッシュをより効率よく生産することができる。 According to invention of Claim 2, 4 , and 6 , metal door sash can be produced more efficiently.

請求項９の発明のように構成すると、金属製のドアサッシュの生産効率がより向上する。 If comprised like invention of Claim 9 , the production efficiency of metal door sash improves more.

本発明の一実施形態である右側のフロントドアの車内側から見た側面図である。It is the side view seen from the vehicle inside of the right front door which is one embodiment of the present invention. 図１のII−II矢線に沿う断面図である。It is sectional drawing which follows the II-II arrow line of FIG. 図２のIII矢線方向に見たドアサッシュの一部を表す図である。It is a figure showing a part of door sash seen in the III arrow line direction of FIG. ドアサッシュの要部の断面図である。It is sectional drawing of the principal part of a door sash. 第一の変形例の図３と同様の図である。It is a figure similar to FIG. 3 of a 1st modification. 第二の変形例の図３と同様の図である。It is a figure similar to FIG. 3 of a 2nd modification. 第三の変形例の図３と同様の図である。It is a figure similar to FIG. 3 of a 3rd modification. 第四の変形例の図３と同様の図である。It is a figure similar to FIG. 3 of a 4th modification. 第五の変形例の図４と同様の断面図である。It is sectional drawing similar to FIG. 4 of the 5th modification. 第六の変形例の図４と同様の断面図である。It is sectional drawing similar to FIG. 4 of the 6th modification.

以下、添付図面を参照しながら本発明の一実施形態について説明する。以下の説明では、ドアサッシュ１４において窓開口１６に臨む側を「内周側」と呼び、これと反対側の車両ボディ開口部に臨む側を「外周側」と呼ぶ。また、前方、後方、上方、下方、車内側、車外側といった方向の表現は、この前部座席用ドア１０が取り付けられる自動車のボディを基準とした方向（「左右方向」は運転席から前方を見たときの方向）を意味する。
図１は自動車の前部座席用の右側の側面ドア１０を示している。ドア１０は、仮想線で概略形状を示す金属製のドアパネル１２と、ドアパネル１２の上部に枠状に形成された金属製のドアサッシュ１４と、ドアパネル１２の上縁部とドアサッシュ１４の内縁部とで囲まれた窓開口１６内を昇降するドアガラス（図示略）と、を備えている。窓開口１６に臨むドアサッシュ１４の内周部には弾性材料からなるガラスランＧＲが設けてあり、ドアガラスの縁部がガラスランＧＲにより保持される。一方、ドアサッシュ１４の外周部には弾性材料からなるウェザーストリップＷＳが設けてある。ドアサッシュ１４は、その前縁部を構成するフロントサッシュ１７と、ドア上縁部を形成するアッパサッシュ１８と、ドアパネル１２の後部から上方へ延設された立柱サッシュ２７と、を備えている。フロントサッシュ１７の上端部とアッパサッシュ１８の前端部は溶接してあり、さらにアッパサッシュ１８の後端部と立柱サッシュ２７の上端部はドアコーナー部で溶接してある。
ドア１０を図示を省略した車両ボディに対して閉じたとき、アッパサッシュ１８は車両ボディのルーフパネルのドア開口部に沿って位置し、ウェザーストリップＷＳが弾性変形しながら当該ドア開口部の内周面に対して接触する。 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, the side facing the window opening 16 in the door sash 14 is referred to as “inner side”, and the side facing the vehicle body opening on the opposite side is referred to as “outer side”. In addition, expressions such as front, rear, upper, lower, vehicle interior, vehicle exterior are directions based on the body of the automobile to which the front seat door 10 is attached (the “left-right direction” refers to the front from the driver seat. Means the direction when viewed).
FIG. 1 shows a right side door 10 for the front seat of an automobile. The door 10 includes a metal door panel 12 whose outline shape is indicated by an imaginary line, a metal door sash 14 formed in a frame shape on the top of the door panel 12, an upper edge portion of the door panel 12, and an inner edge portion of the door sash 14. And a door glass (not shown) that moves up and down in the window opening 16 surrounded by. A glass run GR made of an elastic material is provided on the inner peripheral portion of the door sash 14 facing the window opening 16, and the edge of the door glass is held by the glass run GR. On the other hand, a weather strip WS made of an elastic material is provided on the outer periphery of the door sash 14. The door sash 14 includes a front sash 17 that forms a front edge portion thereof, an upper sash 18 that forms an upper edge portion of the door, and an upright pillar sash 27 that extends upward from the rear portion of the door panel 12. The upper end portion of the front sash 17 and the front end portion of the upper sash 18 are welded, and the rear end portion of the upper sash 18 and the upper end portion of the upright column sash 27 are welded at the door corner portion.
When the door 10 is closed with respect to the vehicle body (not shown), the upper sash 18 is positioned along the door opening of the roof panel of the vehicle body, and the weather strip WS is elastically deformed while the inner periphery of the door opening is closed. Touch the surface.

フロントサッシュ１７及びアッパサッシュ１８は、板状の鉄系材料（例えばＳＵＳ）を図示を省略した搬送装置によって所定方向に移送しながらロール成形して、図２に示す断面形状かつ直線状の長尺部材として形成し、この長尺部材をロール成形後に曲げ加工することによって図示形状としたものである。
フロントサッシュ１７及びアッパサッシュ１８は、車内側に位置し閉鎖断面形状とされた筒状部１９と、筒状部１９から外周側に延びる接続部２０と、接続部２０から車外側に延びる弾性部材保持部２１と、を一体的に備えている。図２に示すように筒状部１９の車外側部、接続部２０、及び弾性部材保持部２１によって囲まれ部分にガラスランＧＲを設けてあり、筒状部１９の外周側部、接続部２０、及び弾性部材保持部２１の外周側部にウェザーストリップＷＳを設けてある。 The front sash 17 and the upper sash 18 are roll-shaped while a plate-shaped iron-based material (for example, SUS) is transported in a predetermined direction by a transport device (not shown), and have a long cross section and a straight line as shown in FIG. It is formed as a member, and the elongated member is bent after roll forming to obtain the illustrated shape.
The front sash 17 and the upper sash 18 are a cylindrical portion 19 that is positioned on the inner side of the vehicle and has a closed cross-sectional shape, a connecting portion 20 that extends from the cylindrical portion 19 to the outer peripheral side, and an elastic member that extends from the connecting portion 20 to the outer side of the vehicle. The holding part 21 is integrally provided. As shown in FIG. 2, a glass run GR is provided in a portion surrounded by the outer portion of the tubular portion 19, the connecting portion 20, and the elastic member holding portion 21, and the outer peripheral side portion of the tubular portion 19, the connecting portion 20 A weather strip WS is provided on the outer peripheral side of the elastic member holding portion 21.

図２に示すように弾性部材保持部２１は、フロントサッシュ１７及びアッパサッシュ１８の母材となる平板状金属板の一方の側縁部により構成した中間部２２（中間金属板）と、他方の側縁近傍により構成した外周面構成部２３（第一外側金属板）と、ロール成形時に他方の側縁部を折り曲げることによって構成した内周面構成部２４（第二外側金属板）と、を有しており、外周面構成部２３と内周面構成部２４の間に中間部２２を位置させている。中間部２２、外周面構成部２３、及び内周面構成部２４（の車内側端部を除く部分）は全て平板形状であり、互いに略平行である。
ロール成形によって弾性部材保持部２１（中間部２２、外周面構成部２３、内周面構成部２４）の形状を確定させた時点では、これら三枚の平板状部は互いに単に接触しているだけである。そこでロール成形中（上記曲げ加工前）に上記搬送装置によって（図２の断面形状に加工した）直線状の長尺部材を移送しながら、長尺部材の外周側に固定状態で配設した第一レーザ光出射部ＬＷ１（トーチ）と長尺部材の内周側に固定状態で配設した第二レーザ光出射部ＬＷ２（トーチ）からレーザ光を同時に出射して、このレーザ光を利用して弾性部材保持部２１をレーザ溶接する。 As shown in FIG. 2, the elastic member holding portion 21 includes an intermediate portion 22 (intermediate metal plate) constituted by one side edge portion of a flat metal plate serving as a base material of the front sash 17 and the upper sash 18, and the other An outer peripheral surface constituting portion 23 (first outer metal plate) constituted by the vicinity of the side edge and an inner peripheral surface constituting portion 24 (second outer metal plate) constituted by bending the other side edge portion at the time of roll forming, The intermediate portion 22 is positioned between the outer peripheral surface constituting portion 23 and the inner peripheral surface constituting portion 24. The intermediate part 22, the outer peripheral surface constituting part 23, and the inner peripheral face constituting part 24 (parts excluding the vehicle inner end part) are all flat and are substantially parallel to each other.
At the time when the shape of the elastic member holding portion 21 (intermediate portion 22, outer peripheral surface constituting portion 23, inner peripheral surface constituting portion 24) is determined by roll forming, these three flat plate portions are merely in contact with each other. It is. Therefore, during the roll forming (before the bending process), a linear long member (processed into the cross-sectional shape in FIG. 2) is transferred by the conveying device, and is fixed on the outer peripheral side of the long member. Laser light is simultaneously emitted from one laser light emitting portion LW1 (torch) and a second laser light emitting portion LW2 (torch) disposed in a fixed state on the inner peripheral side of the long member, and this laser light is used. The elastic member holding part 21 is laser welded.

第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２は図示を省略したレーザ発振器と光ファイバーを介して接続している。第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２は首振り可能であるため、第一レーザ光出射部ＬＷ１と第二レーザ光出射部ＬＷ２から出射されるレーザ光の出射方向は調整可能である。さらにレーザ発振器は第一レーザ光出射部ＬＷ１と第二レーザ光出射部ＬＷ２から出射されるレーザ光の強度を、それぞれ個別に調整可能である。
本実施形態では円を描くように首振りする第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２からレーザ光を上記長尺部材の外周面構成部２３と内周面構成部２４に対して連続的に照射する。そのため、図３に示すように第一レーザ光出射部ＬＷ１によって第一レーザ溶接部Ｗ１が外周面構成部２３に対して（全体として略直線状に延びるように）スピン溶接され、第二レーザ光出射部ＬＷ２によって第二レーザ溶接部Ｗ２が内周面構成部２４に対して（全体として略直線状に延びるように）スピン溶接される（図３に描かれている輪状の部位が肉眼では殆ど認識できない程小さくなるようにスピン溶接を行ってもよい）。
そしてレーザ発振器によってレーザ光の強度を調整することにより、第一レーザ溶接部Ｗ１が外周面構成部２３を板厚方向に貫通すると共に中間部２２の板厚方向の中間部にまで到達し、かつ、第二レーザ溶接部Ｗ２が内周面構成部２４を板厚方向に貫通すると共に中間部２２の板厚方向の中間部にまで到達するようにしている（図４参照）。別言すると、第一レーザ溶接部Ｗ１は内周面構成部２４には到達せずかつ第二レーザ溶接部Ｗ２は外周面構成部２３には到達しないようにしている。このように、第一レーザ溶接部Ｗ１によって外周面構成部２３と中間部２２を強固に接合しかつ第二レーザ溶接部Ｗ２によって内周面構成部２４と中間部２２を強固に接合しつつ、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２を共に中間部２２にまで到達させているので、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２によって中間部２２、外周面構成部２３、及び内周面構成部２４が互いに強固に固定される。 The first laser light emitting part LW1 and the second laser light emitting part LW2 are connected to a laser oscillator (not shown) via an optical fiber. Since the first laser light emission part LW1 and the second laser light emission part LW2 can be swung, the emission direction of the laser light emitted from the first laser light emission part LW1 and the second laser light emission part LW2 can be adjusted. It is. Further, the laser oscillator can individually adjust the intensity of the laser light emitted from the first laser light emitting part LW1 and the second laser light emitting part LW2.
In the present embodiment, laser light is emitted from the first laser light emitting part LW1 and the second laser light emitting part LW2 swinging so as to draw a circle to the outer peripheral surface constituting part 23 and the inner peripheral face constituting part 24 of the long member. Irradiate continuously. Therefore, as shown in FIG. 3, the first laser beam emitting portion LW1 spin-welds the first laser welded portion W1 to the outer peripheral surface constituting portion 23 (so as to extend substantially linearly as a whole), and the second laser beam. The second laser welding portion W2 is spin welded to the inner peripheral surface constituting portion 24 by the emitting portion LW2 (so as to extend substantially linearly as a whole) (the ring-shaped portion depicted in FIG. Spin welding may be performed so that it is so small that it cannot be recognized).
Then, by adjusting the intensity of the laser beam by the laser oscillator, the first laser welded portion W1 penetrates the outer peripheral surface constituting portion 23 in the plate thickness direction and reaches the intermediate portion of the intermediate portion 22 in the plate thickness direction, and The second laser welding portion W2 penetrates the inner peripheral surface constituting portion 24 in the plate thickness direction and reaches the intermediate portion of the intermediate portion 22 in the plate thickness direction (see FIG. 4). In other words, the first laser welded portion W1 does not reach the inner peripheral surface constituting portion 24 and the second laser welded portion W2 does not reach the outer peripheral face constituting portion 23. Thus, while firmly joining the outer peripheral surface constituting portion 23 and the intermediate portion 22 by the first laser welded portion W1 and firmly joining the inner peripheral surface constituting portion 24 and the intermediate portion 22 by the second laser welded portion W2, Since both the first laser welded portion W1 and the second laser welded portion W2 reach the intermediate portion 22, the intermediate portion 22, the outer peripheral surface constituting portion 23, by the first laser welded portion W1 and the second laser welded portion W2, And the inner peripheral surface constituting part 24 is firmly fixed to each other.

このように弾性部材保持部２１の両面側からそれぞれ第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２を行う場合は、第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２は中間部２２にまで到達すればよく、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２の入射側と反対側の金属板の内部にまでレーザ溶接を到達させる必要がない（第一レーザ溶接部Ｗ１を内周面構成部２４の内部にまで到達させかつ第二レーザ溶接部Ｗ２を外周面構成部２３の内部にまで到達させる必要がない）。そのためレーザ発振器によるレーザ光の強度調整がそれほど正確でなくても、第一レーザ溶接部Ｗ１が内周面構成部２４の表面２４ａにまで到達したり、第二レーザ溶接部Ｗ２が外周面構成部２３の表面２３ａにまで到達して、外周面構成部２３や内周面構成部２４の表面２３ａ、２４ａに第一レーザ溶接部Ｗ１や第二レーザ溶接部Ｗ２による凹凸形状が形成されるおそれが殆どない。別言すると、弾性部材保持部２１の一方の表面（２３ａ又は２４ａ）側から他方の表面側（２４ａ又は２３ａ）に向かうレーザ光のみによって弾性部材保持部２１全体をレーザ溶接する場合と比べて、第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２が弾性部材保持部２１（中間部２２、外周面構成部２３、内周面構成部２４）を貫通するおそれが小さい。 Thus, when performing the 1st laser welding part W1 and the 2nd laser welding part W2 from the both surfaces side of the elastic member holding | maintenance part 21, respectively, the 1st laser welding part W1 and the 2nd laser welding part W2 reach to the intermediate part 22. It is only necessary to reach the inside of the metal plate on the side opposite to the incident side of the first laser welded portion W1 and the second laser welded portion W2 (the first laser welded portion W1 is connected to the inner peripheral surface). It is not necessary to reach the inside of the component 24 and make the second laser weld W2 reach the inside of the outer peripheral surface component 23). Therefore, even if the intensity adjustment of the laser beam by the laser oscillator is not so accurate, the first laser welded portion W1 reaches the surface 24a of the inner peripheral surface constituting portion 24, or the second laser welded portion W2 is the outer peripheral surface constituting portion. 23 may reach the surface 23a of the outer peripheral surface 23, and the surface 23a, 24a of the outer peripheral surface constituting portion 23 or the inner peripheral surface constituting portion 24 may be formed with uneven shapes due to the first laser welded portion W1 or the second laser welded portion W2. Almost no. In other words, as compared with the case where the entire elastic member holding portion 21 is laser-welded only by laser light directed from one surface (23a or 24a) side of the elastic member holding portion 21 to the other surface side (24a or 23a), There is little possibility that the first laser welded portion W1 and the second laser welded portion W2 penetrate the elastic member holding portion 21 (intermediate portion 22, outer peripheral surface constituting portion 23, inner peripheral surface constituting portion 24).

さらに中間部２２と外周面構成部２３及び中間部２２と内周面構成部２４を単純な直線的なレーザ溶接ではなくスピン溶接により接合しているので、単純な直線状レーザ溶接と比べて、第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２による弾性部材保持部２１（中間部２２、外周面構成部２３、内周面構成部２４）の溶融範囲が広い。そのため単純な直線状レーザ溶接と比べて、中間部２２と外周面構成部２３及び中間部２２と内周面構成部２４をより強固に接合できる。
しかもロール成形中に上記搬送装置によって直線状の長尺物を搬送しながら第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２を同時に施すので、弾性部材保持部２１の溶接作業を（アーク溶接等と比べて）短時間かつ容易に行うことが可能である。 Furthermore, since the intermediate portion 22 and the outer peripheral surface constituting portion 23 and the intermediate portion 22 and the inner peripheral surface constituting portion 24 are joined by spin welding instead of simple linear laser welding, compared with simple linear laser welding, The melting range of the elastic member holding portion 21 (intermediate portion 22, outer peripheral surface constituting portion 23, inner peripheral surface constituting portion 24) by the first laser welded portion W1 and the second laser welded portion W2 is wide. Therefore, compared with simple linear laser welding, the intermediate part 22 and the outer peripheral surface constituent part 23 and the intermediate part 22 and the inner peripheral surface constituent part 24 can be joined more firmly.
Moreover, since the first laser welded portion W1 and the second laser welded portion W2 are simultaneously applied while the linear apparatus is being conveyed by the conveying device during roll forming, the welding operation of the elastic member holding portion 21 (such as arc welding) is performed. In comparison with a short time).

以上本発明を説明したが、本発明は上記実施形態に限定されるものではなく様々な変形を施しながら実施可能である。
図５の変形例は第一レーザ溶接部Ｗ１を外周面構成部２３及び中間部２２に対して（全体として略直線状に延びるように）波状に施し、第二レーザ溶接部Ｗ２を内周面構成部２４及び中間部２２に対して（全体として略直線状に延びるように）波状に施した例である。この第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２は、第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２をフロントサッシュ１７及びアッパサッシュ１８の幅方向（図５の上下方向）に首振りさせながらレーザ光を上記長尺部材の外周面構成部２３と内周面構成部２４に対して連続的に照射することにより得られる。この変形例の場合も上記実施形態（スピン溶接の場合）と同様の作用効果を発揮可能である。 Although the present invention has been described above, the present invention is not limited to the above embodiment and can be implemented with various modifications.
In the modification of FIG. 5, the first laser welded portion W1 is applied in a wave shape to the outer peripheral surface constituting portion 23 and the intermediate portion 22 (so as to extend substantially linearly as a whole), and the second laser welded portion W2 is applied to the inner peripheral surface. This is an example in which the component portion 24 and the intermediate portion 22 are waved (so as to extend substantially linearly as a whole). The first laser welded portion W1 and the second laser welded portion W2 are arranged so that the first laser light emitting portion LW1 and the second laser light emitting portion LW2 are in the width direction of the front sash 17 and the upper sash 18 (vertical direction in FIG. 5). It is obtained by continuously irradiating the outer peripheral surface constituting portion 23 and the inner peripheral face constituting portion 24 of the long member with laser light while swinging. In the case of this modification as well, the same operational effects as in the above embodiment (in the case of spin welding) can be exhibited.

図６の変形例は第一レーザ溶接部Ｗ１を外周面構成部２３及び中間部２２に対して直線状に延びるように施し、第二レーザ溶接部Ｗ２を内周面構成部２４及び中間部２２に対して直線状に延びるように施した例である。この第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２は、第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２を固定した状態で（首振りさせずに）レーザ光を上記長尺部材の外周面構成部２３と内周面構成部２４に対して連続的に照射することにより得られる。この変形例の場合は、スピン溶接や波状溶接と比べて溶接速度を速くすることが可能なので、ドアサッシュ１４の生産性が向上する。
なお上記実施形態、図５の変形例、及び図６の変形例において、第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２を非連続の（所定間隔で連続性が途切れる）線状に形成してもよい。但し、このように非連続に形成する場合は第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２のレーザ光の入射面（第一レーザ溶接部Ｗ１にとっての表面２３ａ、第二レーザ溶接部Ｗ２にとっての表面２４ａ）が波打つおそれが高いので、連続的に形成する方が好ましい。 In the modification of FIG. 6, the first laser welded portion W1 is applied so as to extend linearly with respect to the outer peripheral surface constituting portion 23 and the intermediate portion 22, and the second laser welded portion W2 is applied to the inner peripheral surface constituting portion 24 and the intermediate portion 22. It is the example given so that it might extend linearly to. The first laser welded portion W1 and the second laser welded portion W2 transmit the laser beam to the long member with the first laser beam emitting portion LW1 and the second laser beam emitting portion LW2 fixed (without swinging). It is obtained by continuously irradiating the outer peripheral surface constituting part 23 and the inner peripheral face constituting part 24. In the case of this modification, the welding speed can be increased as compared with spin welding or wave welding, so that the productivity of the door sash 14 is improved.
In the above embodiment, the modified example of FIG. 5 and the modified example of FIG. 6, the first laser welded portion W1 and the second laser welded portion W2 are formed in a discontinuous (continuity is interrupted at a predetermined interval) line shape. May be. However, in the case of forming in a discontinuous manner in this way, the incident surfaces (the surface 23a for the first laser welded portion W1 and the second laser welded portion W2) of the first laser welded portion W1 and the second laser welded portion W2 are used. Since the surface 24a) is likely to undulate, it is preferable to form it continuously.

図７の変形例は第一レーザ溶接部Ｗ１を外周面構成部２３及び中間部２２に対してスポット溶接（非連続の点状に溶接）し、第二レーザ溶接部Ｗ２を内周面構成部２４及び中間部２２に対してスポット溶接した例である。図示するように第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２のフロントサッシュ１７及びアッパサッシュ１８の幅方向位置（図７の上下位置）及び第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２のフロントサッシュ１７及びアッパサッシュ１８の長手方向位置（図７の左右位置）は互いにずれている（即ち、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２を千鳥配置にしている）。但し、各第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２は（単純な円形ではなく）渦巻き状に施してある。これらの第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２は、搬送装置による直線状長尺物の移送を一時停止した状態で、第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２を渦巻き状に首振りさせながらレーザ光を上記長尺部材の外周面構成部２３と内周面構成部２４に対して断続的に照射することにより得られる。この変形例の第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２はスポット溶接であるものの、渦巻き状に溶接してあるので、各スポット溶接を単純な円形をなすように形成する場合と比べて、弾性部材保持部２１（中間部２２、外周面構成部２３、内周面構成部２４）をより強固に固定できる。 In the modified example of FIG. 7, the first laser weld W1 is spot welded (discontinuously welded to the outer peripheral surface constituent part 23 and the intermediate part 22) and the second laser weld W2 is connected to the inner peripheral surface constituent part. This is an example in which spot welding is performed on 24 and the intermediate portion 22. As shown in the drawing, the width direction positions (the vertical positions in FIG. 7) of the front sash 17 and the upper sash 18 of the first laser welded portion W1 and the second laser welded portion W2, and the first laser welded portion W1 and the second laser welded portion W2. The front sash 17 and the upper sash 18 in the longitudinal direction (left and right positions in FIG. 7) are shifted from each other (that is, the first laser welded portion W1 and the second laser welded portion W2 are arranged in a staggered manner). However, each 1st laser welding part W1 and the 2nd laser welding part W2 are given in the shape of a spiral (not a simple circle). The first laser welded portion W1 and the second laser welded portion W2 are configured so that the first laser light emitting portion LW1 and the second laser light emitting portion LW2 are in a state where the transfer of the linear elongated object by the conveying device is temporarily stopped. It is obtained by intermittently irradiating the outer peripheral surface constituting portion 23 and the inner peripheral surface constituting portion 24 of the long member with laser light while swinging in a spiral shape. Although the first laser welded portion W1 and the second laser welded portion W2 of this modified example are spot welds, they are welded in a spiral shape, so that each spot weld is formed so as to form a simple circle. The elastic member holding portion 21 (the intermediate portion 22, the outer peripheral surface constituting portion 23, and the inner peripheral surface constituting portion 24) can be more firmly fixed.

図８の変形例は第一レーザ溶接部Ｗ１を外周面構成部２３及び中間部２２に対してスポット溶接すると共に第二レーザ溶接部Ｗ２を内周面構成部２４及び中間部２２に対してスポット溶接し、さらに第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２をフロントサッシュ１７及びアッパサッシュ１８の長手方向（図８の左右方向）に延びる一直線上に配置した例である。但し、これら各第一レーザ溶接部Ｗ１、第二レーザ溶接部Ｗ２も渦巻き状に施してある。これらの第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２も、搬送装置による直線状長尺物の移送を一時停止した状態で、第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２を渦巻き状に首振りさせながらレーザ光を上記長尺部材の外周面構成部２３と内周面構成部２４に対して断続的に照射することにより得られる。この変形例の場合は、図７の変形例と比べて溶接箇所が減少するので、溶接速度及びドアサッシュ１４の生産性をさらに向上させることが可能である。
なお図７、図８の変形例において、搬送装置による直線状長尺物の移送を一時停止させずに、搬送装置による直線状長尺物の移送速度と同期させながら第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２を直線状長尺物と一緒に直線状長尺物と平行方向に移動させ、第一レーザ光出射部ＬＷ１及び第二レーザ光出射部ＬＷ２からレーザ光を断続的に照射してもよい。 In the modified example of FIG. 8, the first laser welded portion W1 is spot welded to the outer peripheral surface constituting portion 23 and the intermediate portion 22, and the second laser welded portion W2 is spotted to the inner peripheral surface constituting portion 24 and the intermediate portion 22. This is an example in which the first laser welded portion W1 and the second laser welded portion W2 are arranged on a straight line extending in the longitudinal direction of the front sash 17 and the upper sash 18 (left and right direction in FIG. 8). However, each of the first laser welded portion W1 and the second laser welded portion W2 is also spirally formed. These first laser welded portion W1 and second laser welded portion W2 also have the first laser light emitting portion LW1 and the second laser light emitting portion LW2 in a state where the transfer of the linear elongated object by the conveying device is temporarily stopped. It is obtained by intermittently irradiating the outer peripheral surface constituting portion 23 and the inner peripheral surface constituting portion 24 of the long member with laser light while swinging in a spiral shape. In the case of this modification, since the number of welds is reduced as compared with the modification of FIG. 7, the welding speed and the productivity of the door sash 14 can be further improved.
7 and 8, the first laser beam emitting unit LW1 is synchronized with the transfer speed of the linear long object by the transfer device without temporarily stopping the transfer of the linear long object by the transfer device. The second laser light emitting portion LW2 is moved in a direction parallel to the linear elongated object together with the linear elongated object, and laser light is intermittently transmitted from the first laser light emitting portion LW1 and the second laser light emitting portion LW2. May be irradiated.

さらに本発明はドア１０のフロントサッシュ１７及びアッパサッシュ１８とは異なる部位や自動車のドア１０とは別の部位に対しても適用可能であり、さらに自動車以外の物に対して適用することも可能である。 Furthermore, the present invention can be applied to a part different from the front sash 17 and the upper sash 18 of the door 10 or a part different from the door 10 of the automobile, and can also be applied to things other than the automobile. It is.

また本発明は４枚以上の金属板からなる積層体に対しても適用可能である。図９、図１０はその一例である。
図９は４枚の金属板３０、３１、３２、３３（３０が「第一外側金属板」、３１及び３２が「中間金属板」、３３が「第二外側金属板」）からなる積層体を第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２によって接合した例である。この例では、第一レーザ溶接部Ｗ１は金属板３０の表面３０ａ側から金属板３０、３１、３２に及んでおり、第二レーザ溶接部Ｗ２は金属板３３の表面３３ａ側から金属板３３、３２、３１に及んでいる。この例では第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２が共に金属板３１及び金属板３２に及んでいるので、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２によって金属板３０、３１、３２、３３を強固に固定できる。
図１０は５枚の金属板４０、４１、４２、４３、４４（４０が「第一外側金属板」、４１−４３が「中間金属板」、４４が「第二外側金属板」）からなる積層体を第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２によって接合した例である。この例では、第一レーザ溶接部Ｗ１は金属板４０の表面４０ａ側から金属板４０、４１、４２に及んでおり、第二レーザ溶接部Ｗ２は金属板４４の表面４４ａ側から金属板４４、４３、４２に及んでいる。この例では第一レーザ溶接部Ｗ１及び第二レーザ溶接部Ｗ２が共に金属板４２に及んでいるので、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２によって金属板４０、４１、４２、４３、４４を強固に固定できる。
なお図９の変形例において、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２が共に溶接される板材を一枚のみ（例えば金属板３１のみ）としてもよい。同様に図１０の変形例において、第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２が共に溶接される板材を複数（例えば金属板４１と金属板４２）としてもよい。 The present invention can also be applied to a laminate composed of four or more metal plates. 9 and 10 are examples thereof.
FIG. 9 shows a laminate comprising four metal plates 30, 31, 32, 33 (30 is a “first outer metal plate”, 31 and 32 are “intermediate metal plates”, and 33 is a “second outer metal plate”). This is an example in which the first laser weld W1 and the second laser weld W2 are joined. In this example, the first laser welded portion W1 extends from the surface 30a side of the metal plate 30 to the metal plates 30, 31, 32, and the second laser welded portion W2 extends from the surface 33a side of the metal plate 33 to the metal plate 33, 32, 31. In this example, since both the first laser welded portion W1 and the second laser welded portion W2 reach the metal plate 31 and the metal plate 32, the metal plates 30, 31 are formed by the first laser welded portion W1 and the second laser welded portion W2. , 32, 33 can be firmly fixed.
FIG. 10 includes five metal plates 40, 41, 42, 43, and 44 (40 is a “first outer metal plate”, 41-43 is an “intermediate metal plate”, and 44 is a “second outer metal plate”). This is an example in which the laminate is joined by the first laser weld W1 and the second laser weld W2. In this example, the first laser welded portion W1 extends from the surface 40a side of the metal plate 40 to the metal plates 40, 41, 42, and the second laser welded portion W2 extends from the surface 44a side of the metal plate 44 to the metal plate 44, 43 and 42. In this example, since both the first laser welded portion W1 and the second laser welded portion W2 reach the metal plate 42, the metal plates 40, 41, 42, 43 are formed by the first laser welded portion W1 and the second laser welded portion W2. 44 can be firmly fixed.
In the modification of FIG. 9, only one plate (for example, only the metal plate 31) may be used as the plate material to which the first laser welded portion W1 and the second laser welded portion W2 are welded together. Similarly, in the modified example of FIG. 10, a plurality of plate materials (for example, the metal plate 41 and the metal plate 42) on which the first laser welded portion W1 and the second laser welded portion W2 are welded together may be used.

さらに上記実施形態及び各変形例において、金属板の積層体における第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２の入射側と反対側の金属板の内部にまで第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２を到達させてもよい（例えば上記実施形態において第一レーザ溶接部Ｗ１を内周面構成部２４の内部にまで到達させ、かつ、第二レーザ溶接部Ｗ２を外周面構成部２３の内部にまで到達させてもよい）。但し、この場合も第一レーザ溶接部Ｗ１と第二レーザ溶接部Ｗ２が入射側と反対側の金属板の表面には到達しないようにする。 Furthermore, in the said embodiment and each modification, the 1st laser welding part W1 and the 1st laser welding part W1 and the inside of the metal plate on the opposite side to the incident side of the 2nd laser welding part W2 in the laminated body of a metal plate are carried out. Two laser welds W2 may be reached (for example, in the above embodiment, the first laser weld W1 is made to reach the inside of the inner peripheral surface component 24, and the second laser weld W2 is set to the outer peripheral surface component. 23 may be reached). However, also in this case, the first laser welded portion W1 and the second laser welded portion W2 are prevented from reaching the surface of the metal plate opposite to the incident side.

さらに本発明を適用可能な金属板は鉄系材料には限定されず、例えばアルミ系材料からなる金属板に対しても適用可能である。 Furthermore, the metal plate to which the present invention can be applied is not limited to an iron-based material, and can be applied to, for example, a metal plate made of an aluminum-based material.

１０ドア（フロントドア）
１２ドアパネル
１４ドアサッシュ
１６窓開口
１７フロントサッシュ
１８アッパサッシュ
１９筒状部
２０接続部
２１弾性部材保持部
２２中間部（中間金属板）
２３外周面構成部（第一外側金属板）
２３ａ表面
２４内周面構成部（第二外側金属板）
２４ａ表面
２７立柱サッシュ
３０金属板（第一外側金属板）
３０ａ表面
３１３２金属板（中間金属板）
３３金属板（第二外側金属板）
３３ａ表面
４０金属板（第一外側金属板）
４０ａ表面
４１４２４３金属板（中間金属板）
４４金属板（第二外側金属板）
４４ａ表面
Ｇドアガラス
ＬＷ１第一レーザ光出射部
ＬＷ２第二レーザ光出射部
ＧＲガラスラン
Ｗ１第一レーザ溶接部
Ｗ２第二レーザ溶接部
ＷＳウェザーストリップ 10 Door (front door)
12 door panel 14 door sash 16 window opening 17 front sash 18 upper sash 19 cylindrical part 20 connecting part 21 elastic member holding part 22 intermediate part (intermediate metal plate)
23 Peripheral surface component (first outer metal plate)
23a Surface 24 Inner peripheral surface constituent part (second outer metal plate)
24a surface 27 vertical pillar sash 30 metal plate (first outer metal plate)
30a Surface 31 32 Metal plate (intermediate metal plate)
33 Metal plate (second outer metal plate)
33a Surface 40 metal plate (first outer metal plate)
40a Surface 41 42 43 Metal plate (intermediate metal plate)
44 Metal plate (second outer metal plate)
44a Surface G Door glass LW1 First laser light emitting part LW2 Second laser light emitting part GR Glass run W1 First laser welded part W2 Second laser welded part WS Weather strip

Claims

A first outer metal plate;
A second outer metal plate;
A plurality of intermediate metal plates located between the first outer metal plate and the second outer metal plate and constituting a laminate with the first outer metal plate and the second outer metal plate;
A first laser weld that is applied from the surface side of the first outer metal plate and reaches the intermediate metal plate and does not reach the surface of the second outer metal plate;
A second laser weld that is applied from the surface side of the second outer metal plate, reaches the intermediate metal plate, and does not reach the surface of the first outer metal plate;
With
The laser welded structure of a metal plate laminate, wherein the first laser weld and the second laser weld reach the common intermediate metal plate.

In the laser welding structure of the metal plate laminate according to claim 1,
A laser welding structure of a metal plate laminate in which the first laser weld and the second laser weld are spin welding extending linearly as a whole.

A first outer metal plate;
A second outer metal plate;
An intermediate metal plate located between the first outer metal plate and the second outer metal plate and constituting a laminate with the first outer metal plate and the second outer metal plate;
A first laser weld that is applied from the surface side of the first outer metal plate and reaches the intermediate metal plate and does not reach the surface of the second outer metal plate;
A second laser weld that is applied from the surface side of the second outer metal plate, reaches the intermediate metal plate, and does not reach the surface of the first outer metal plate;
With
The vehicle having a laser welding structure for a metal plate laminate, wherein the first outer metal plate, the second outer metal plate, and the intermediate metal plate constitute a part of a door sash of a vehicle door. Door sash.

In the vehicle door sash provided with the laser welding structure of the metal plate laminate according to claim 3 ,
The vehicle door sash provided with the laser welding structure of the metal plate laminated body in which the first laser welding portion and the second laser welding portion are spin welding extending linearly as a whole.

A first outer metal plate;
A second outer metal plate;
A plurality of intermediate metal plates located between the first outer metal plate and the second outer metal plate and constituting a laminate with the first outer metal plate and the second outer metal plate;
A method of laser welding metal plate laminates comprising:
Applying a first laser weld that reaches the intermediate metal plate and does not reach the surface of the second outer metal plate from the surface side of the first outer metal plate toward the second outer metal plate side; And applying a second laser weld that reaches the intermediate metal plate and does not reach the surface of the first outer metal plate from the surface side of the second outer metal plate toward the first outer metal plate side. ,
Have
The laser welding method for a metal plate laminate, wherein the first laser weld and the second laser weld reach the common intermediate metal plate.

In the laser welding method of the metal plate laminate according to claim 5,
A laser welding method for a metal plate laminate, wherein the first laser weld and the second laser weld are spin welding extending linearly as a whole.

A first outer metal plate;
A second outer metal plate;
An intermediate metal plate located between the first outer metal plate and the second outer metal plate and constituting a laminate with the first outer metal plate and the second outer metal plate;
A method of laser welding metal plate laminates comprising:
Applying a first laser weld that reaches the intermediate metal plate and does not reach the surface of the second outer metal plate from the surface side of the first outer metal plate toward the second outer metal plate side; And applying a second laser weld that reaches the intermediate metal plate and does not reach the surface of the first outer metal plate from the surface side of the second outer metal plate toward the first outer metal plate side. ,
Have
The first outer metal plate, the second outer metal plate, and the intermediate metal plate constitute part of a door sash of a vehicle door, and for a vehicle using a laser welding method for a metal plate laminate. Manufacturing method of door sash.

In the manufacturing method of the door sash for vehicles using the laser welding method of the metal plate laminated body of Claim 7 ,
The manufacturing method of the door sash for vehicles using the laser welding method of the metal plate laminated body whose said 1st laser welding part and said 2nd laser welding part are the spin welding extended linearly as a whole.

In the manufacturing method of the vehicle door sash using the laser welding method of the metal plate laminated body according to claim 7 or 8 ,
The door sash is configured by roll forming,
The manufacturing method of the door sash for vehicles using the laser welding method of the metal plate laminated body which performs said 1st laser welding part and said 2nd laser welding part during the said roll forming.