[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPH07251283A - Method for laser beam welding and device for holding member to be joined - Google Patents

Method for laser beam welding and device for holding member to be joined

Info

Publication number
JPH07251283A
JPH07251283A JP6041607A JP4160794A JPH07251283A JP H07251283 A JPH07251283 A JP H07251283A JP 6041607 A JP6041607 A JP 6041607A JP 4160794 A JP4160794 A JP 4160794A JP H07251283 A JPH07251283 A JP H07251283A
Authority
JP
Japan
Prior art keywords
joined
spacer
jig
materials
thickness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6041607A
Other languages
Japanese (ja)
Other versions
JP2711068B2 (en
Inventor
Hironori Goto
博記 後藤
Hiroshi Mitsuyoshi
博司 光吉
Yasuo Masuda
泰夫 増田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP6041607A priority Critical patent/JP2711068B2/en
Publication of JPH07251283A publication Critical patent/JPH07251283A/en
Application granted granted Critical
Publication of JP2711068B2 publication Critical patent/JP2711068B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Laser Beam Processing (AREA)

Abstract

PURPOSE:To prevent generation of the blowhole, and to reduce the burn through of the bead. CONSTITUTION:The thickness of an upper body U and a lower body L which are covered with the covering material having the melting point which is lower than that of the base metal, and the boiling point which is higher than the melting point of the base metal is measured at a plurality of points, the height of a spacer 15 is determined from the range of fluctuation of the sheet thickness at the respective points and the tolerance, the lapped flanges of the upper body U and the lower body L are held by a lower receiving jig 1 and an upper pressing jig 8 with the space between the prescribed clearance and the condition where the prescribed light pressure is applied, and the flanges are welded by a laser beam welding machine 17. Generation of the evaporated gas of the covering material is reduced, and the generated gas is discharged from the clearance between the flanges to prevent generation of the blowhole. The clearance is small from the relationship with the flange thickness, and the burn through of the bead is small.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、プレス加工された複数
の被接合材を相互にレーザー溶接して燃料タンク等を製
作するような場合に適したレーザー溶接方法、及びこの
レーザー溶接方法を実施する場合に用いる被接合材の挾
持装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser welding method suitable for manufacturing a fuel tank or the like by laser-welding a plurality of press-worked materials to each other, and to carry out the laser welding method. The present invention relates to a device for holding a material to be joined, which is used when

【0002】[0002]

【従来の技術】被接合材が母材より低融点の被覆材で被
覆されている鋼板どうし、或いはこの鋼板と表面被覆さ
れていない鋼板を密接して重ね合わせレーザー溶接する
と、被覆材の蒸発ガスにより接合部にブローホールが形
成されて溶接強度が低下したり、容器等の溶接の場合に
は気密姓が保てなくなる等の不具合が発生することがあ
る。
2. Description of the Related Art Evaporation gas of a coating material is produced when the steel sheets to be joined are coated with a coating material having a melting point lower than that of the base material, or when this steel sheet and a steel sheet not surface-coated are closely overlapped and laser-welded. As a result, a blow hole may be formed at the joint to lower the welding strength, and in the case of welding a container or the like, problems such as the inability to maintain airtightness may occur.

【0003】このような不具合を解決するため、特公平
4−13077号公報や特開昭56−62688号公報
で開示されているように、被接合材に突起部や凹部を設
けて被接合材相互間に隙間を形成し、この隙間から被覆
材の蒸発ガスを速やかに排出してブローホールの発生を
防ぐ方法がとられている。
In order to solve such a problem, as disclosed in Japanese Patent Publication No. 4-13077 and Japanese Patent Application Laid-Open No. 56-62688, the material to be bonded is provided with a projection or a recess. A method is adopted in which a gap is formed between the two and the vaporized gas of the coating material is quickly discharged from this gap to prevent the generation of blow holes.

【0004】[0004]

【発明が解決しようとする課題】しかし、前記のように
被接合材に突起部や凹部を設ける方法では、例えば燃料
タンク等の外周フランジ部を接合する場合、突起部や凹
部を設けるために外周フランジ部を幅広くしなければな
らず、燃料タンクが車体等に内蔵される場合、外周フラ
ンジ部が幅広くなる分だけ全体容量が少なくなる等の不
具合がある。また、被接合材の板厚が薄い場合には、被
接合材相互間に被接合材の板厚との関係において大きい
隙間があると溶接ビードが融け落ち溶接強度が低下す
る。
However, in the method of providing the projections or recesses in the materials to be joined as described above, when the outer peripheral flange portion of a fuel tank or the like is to be joined, the outer circumference is provided to provide the projections or depressions. When the fuel tank is built in the vehicle body or the like, the flange portion must be widened, and there is a problem that the outer peripheral flange portion is widened so that the total capacity is reduced. Further, when the material to be joined has a small thickness, if there is a large gap between the materials to be joined in relation to the thickness of the material to be joined, the welding bead will melt and the welding strength will decrease.

【0005】本発明は、必要以上にフランジ部を幅広く
して突起部や凹部を設けなくても、接合部のブローホー
ルの発生を防ぐことができ、溶接ビードの融落ちも少な
くすることのできるレーザー溶接方法及び被接合材の挾
持装置を提供することを目的としている。
According to the present invention, it is possible to prevent the generation of blowholes at the joint portion and to reduce the melt-off of the welding bead without widening the flange portion more than necessary and not providing the protrusion portion and the recess portion. An object of the present invention is to provide a laser welding method and a device for holding a material to be joined.

【0006】[0006]

【課題を解決するための手段】上記の目的を達成するめ
たに、本発明のレーザー溶接方法は、複数の被接合材の
少なくとも一つが母材の融点より低い融点と母材の融点
より高い沸点を持つ被覆材で被覆された被接合材を重ね
合わせて、上部押え治具と下部受け治具の間に被接合材
を重ね合わせた厚さより僅かに厚いか略等しいスペーサ
ーを配設して被接合材を所定のクリアランスから所定の
軽加圧状態の間で挾持してレーザー溶接を行い、レーザ
ービームの照射でガス化した被覆材の蒸発ガスが接合材
相互間の隙間から排出されるようにした。
In order to achieve the above object, in the laser welding method of the present invention, at least one of a plurality of materials to be joined has a melting point lower than the melting point of the base material and a boiling point higher than the melting point of the base material. The materials to be bonded, which are covered with the coating material with, are stacked, and a spacer that is slightly thicker or approximately equal to the thickness of the materials to be bonded is placed between the upper holding jig and the lower receiving jig. Hold the bonding material from the specified clearance between the specified light pressure conditions and perform laser welding so that the vaporized gas of the coating material gasified by laser beam irradiation is discharged from the gap between the bonding materials. did.

【0007】鉛を主体とした錫等との合金メッキ鋼板等
からなる被接合材を接合の対象とすることができる。
A material to be joined made of an alloy-plated steel sheet mainly composed of lead and alloyed with tin or the like can be an object to be joined.

【0008】また、本発明の被接合材の挾持装置は、被
接合材の接合フランジ部を支える下部受け治具と、前記
接合フランジ部の外側部に下部受け治具に着脱可能に複
数個配設されたスペーサーと、該スペーサーに対応して
設けられて駆動部材により開閉され、被接合材を着脱可
能に挾持する上部押え治具とで構成し、前記スペーサー
を、被接合材の接合フランジ部を重ね合わせた厚さより
僅かに厚いか略等しい厚さの間とした。
Further, according to the present invention, there is provided a lower holding jig for supporting a joining flange portion of a joined material, and a plurality of detachable detachable jigs arranged on the outer side portion of the joining flange portion. The spacer is provided with an upper holding jig which is provided corresponding to the spacer and which is opened and closed by a driving member and which detachably holds the material to be joined. The spacer is a joining flange portion of the material to be joined. Was slightly thicker than the superposed thickness or between the substantially equal thicknesses.

【0009】[0009]

【作用】上部押え治具と下部受け治具による被接合材の
押え幅が、下部受け治具に着脱可能に配設された複数個
のスペーサーの働きで所定の範囲に収まり、被接合材が
所定のクリアランスから所定の軽加圧状態で挾持され
る。そして、被覆材の沸点が母材の融点よりも高いの
で、レーザー溶接の際に被覆材の蒸発ガスの発生が比較
的少なく、複数の被接合材が軽加圧状態で挾持されてい
ても、被覆材の蒸発ガスが被接合材相互間の隙間から排
出され、ブローホールの発生を防いだ状態でレーザー溶
接が行われる。また、被接合材相互間の隙間が被接合材
の板厚との関係において小さいのでビードの融落ちも小
さくなる。
[Function] The holding width of the material to be joined by the upper holding jig and the lower receiving jig is within a predetermined range by the action of the plurality of spacers detachably mounted on the lower receiving jig, It is held in a predetermined light pressure state from a predetermined clearance. Then, since the boiling point of the coating material is higher than the melting point of the base material, the generation of vaporized gas of the coating material during laser welding is relatively small, and even if a plurality of materials to be joined are held in a lightly pressurized state, The evaporative gas of the coating material is discharged from the gap between the materials to be joined, and laser welding is performed in a state in which blowholes are prevented from occurring. Further, since the gap between the materials to be joined is small in relation to the plate thickness of the materials to be joined, the melting of the beads is also reduced.

【0010】[0010]

【実施例】以下、本発明を図面を参照して説明する。図
1ないし図3は本発明に係る被接合材の挾持装置の一実
施例を示す。本実施例の挾持装置は、下体L(被接合
材)と上体U(被接合材)をそれらのフランジ(接合フ
ランジ部)La,Uaを向き合わせて水平に挾持するも
のである。下体Lと上体Uはプレス加工で成形されてお
り、互いのフランジLa,Uaをレーザ溶接されて燃料
タンクとなる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of a device for holding a material to be joined according to the present invention. The holding device of this embodiment holds a lower body L (material to be joined) and an upper body U (material to be joined) horizontally with their flanges (joint flange portions) La and Ua facing each other. The lower body L and the upper body U are formed by press working, and their flanges La and Ua are laser-welded to form a fuel tank.

【0011】下体Lは下部受け治具1にフランジLaを
載せて水平に支持される。下部受け治具1は環状に形成
されており、台板2の上にボルト3で取り付けられた柱
状の複数の固定具4にボルト5によって水平に固定され
ている。下体Lは、複数(図では8個)の平板状受け金
具6によって所定の支持姿勢に整えられる。受け金具6
はボルト7で台板2にその位置を調節自在に取り付けら
れている。
The lower body L is horizontally supported by mounting a flange La on the lower receiving jig 1. The lower receiving jig 1 is formed in an annular shape, and is horizontally fixed by bolts 5 to a plurality of columnar fixtures 4 mounted on the base plate 2 by bolts 3. The lower body L is arranged in a predetermined supporting posture by a plurality of (eight in the figure) flat plate-shaped metal fittings 6. Bracket 6
Is attached to the base plate 2 with bolts 7 so that its position can be adjusted.

【0012】符号8は上部押え治具である。上部押え治
具8は、下体Lの上に載せられた上体UのフランジUa
を押えるものであり、その一端をシリンダ9のピストン
ロッド9aにピン10で結合され、また中間部をリンク
11を介して支柱12に連結されている。リンク11は
その下端をピン13で支柱12に、また上端をピン14
で上部押え治具8にそれぞれ結合され、支柱12に上部
押え治具8を連結している。リンク11は支柱12に対
し、また上部押え治具8はリンク11に対し、ピン1
3,14を支点に垂直な面内でそれぞれ回動自在であ
る。
Reference numeral 8 is an upper holding jig. The upper pressing jig 8 is a flange Ua of the upper body U placed on the lower body L.
Is connected to the piston rod 9a of the cylinder 9 by a pin 10, and the middle portion is connected to the column 12 via a link 11. The link 11 has a pin 13 at its lower end and a pin 14 at its upper end.
Are connected to the upper pressing jig 8 respectively, and the upper pressing jig 8 is connected to the column 12. The link 11 is attached to the column 12, the upper holding jig 8 is attached to the link 11, and the pin 1
Each of them is rotatable in a plane perpendicular to the fulcrums.

【0013】上部押え治具8は、シリンダ9の伸長によ
ってピン14を支点に回動し、図2の実線のようにほぼ
水平になって上体UのフランジUaを押さえ、またシリ
ンダ9の縮小によってピン14を支点に上記の逆方向に
回動し、図2の2点鎖線のように傾斜して上体Uのフラ
ンジUaから離れる。リンク11は、シリンダ9の伸長
時にほぼ垂直に起立して上部押え治具8を下部受け治具
1側に移動させるとともに、シリンダ9の縮小時にシリ
ンダ9側に倒れて上部押え治具8を下部受け治具1から
退避させ、下部受け治具1の上方を広く開放する。
The upper holding jig 8 rotates about the pin 14 as a fulcrum by the extension of the cylinder 9 and becomes substantially horizontal as shown by the solid line in FIG. 2 to hold down the flange Ua of the upper body U and reduce the cylinder 9. Is rotated in the opposite direction with the pin 14 as a fulcrum, is inclined as shown by the chain double-dashed line in FIG. 2, and is separated from the flange Ua of the upper body U. The link 11 stands up almost vertically when the cylinder 9 is extended to move the upper pressing jig 8 to the lower receiving jig 1 side, and when the cylinder 9 is contracted, the link 11 falls to the cylinder 9 side to lower the upper pressing jig 8 downward. The upper part of the lower receiving jig 1 is widely opened by retracting from the receiving jig 1.

【0014】上部押え治具8とこれに関係するシリンダ
9等は下部受け治具1の外側に8組設けられ、各上部押
え治具8は下部受け治具1に対応して環状に配設されて
いる。
Eight sets of the upper holding jig 8 and the cylinders 9 and the like related thereto are provided outside the lower receiving jig 1, and each upper holding jig 8 is annularly arranged corresponding to the lower receiving jig 1. Has been done.

【0015】また符号15はスペーサーである。スペー
サー15は、各上部押え治具8に対応して1個或いは2
個(3個以上でも可)宛下部受け治具1にボルト16で
着脱自在に取り付けられている。スペーサー15は、上
部押え治具8を当接させ、下部受け治具1と上部押え治
具8によるフランジLa,Uaの挾持を、フランジL
a,Uaの部分に所定のクリアランスが生じる状態か
ら、フランジLa,Uaが所定の軽加圧状態となる間に
するものである。以下これについて詳しく説明する。
Reference numeral 15 is a spacer. One spacer 15 or two spacers 15 are provided corresponding to each upper pressing jig 8.
It is detachably attached to the lower receiving jig 1 for individual pieces (three or more pieces are possible) with bolts 16. The spacer 15 contacts the upper pressing jig 8 and holds the flanges La and Ua by the lower receiving jig 1 and the upper pressing jig 8 so that the flange L
This is done from the state in which a predetermined clearance is generated in the portions a and Ua to the state in which the flanges La and Ua are in a predetermined light pressure state. This will be described in detail below.

【0016】本願の発明者は、両面に107〜157g
/m2 のPb−Sn合金メッキ(沸点は約2000℃)
を施した厚さt1,t2(図3)が0.7mm、公差が
0から−0.05mmの2枚の鋼板(融点は約1500
℃)を重ね合わせた試験片(ワーク)Wa,Wbを多数
用意し、下部受け治具1に取り付けるスペーサー15の
厚さ(高さ)A(図3)を変えながらレーザー溶接機1
7(図2)でレーザー溶接を行い、接合個所に発生する
ブローホールの数やビードの融落ち等を調べた。
The inventor of the present application has found that 107 to 157 g on both sides.
/ M 2 Pb-Sn alloy plating (boiling point is about 2000 ° C)
Two steel plates with a thickness t1, t2 (Fig. 3) of 0.7 mm and a tolerance of 0 to -0.05 mm (melting point of about 1500
A large number of test pieces (workpieces) Wa and Wb in which the (° C.) are overlapped are prepared, and the thickness (height) A (FIG. 3) of the spacer 15 attached to the lower receiving jig 1 is changed and the laser welding machine 1 is changed.
Laser welding was performed at No. 7 (FIG. 2), and the number of blowholes generated at the joint and the melting of beads were examined.

【0017】その結果は図4(図中、黒丸はピンホール
を、また黒四角はビード部板厚減を示す。)のようにな
り、下部受け治具1と上部押え治具8による挾持(クラ
ンプ)圧力が10kg/cm2 以上の場合には鋼板相互
間が密接しすぎてメッキの蒸発ガスの逃げ場が無くなり
ブローホールが発生しやすく、ワークWa,Wbの隙間
(クリアランス)Bが0.3mm以上になるとビードの
融落ちがひどくなるということが判った。なお、挾持圧
力10kg/cm2、隙間B0.3mmが最 大許容値で
ある。上記試験片Wa,Wbの板厚、公差、メッキの種
類及び量は下体Lと上体UのフランジLa,Uaと同じ
である。
The results are shown in FIG. 4 (in the figure, black circles indicate pinholes, and black squares indicate reduction in bead thickness), which is held by the lower receiving jig 1 and the upper holding jig 8 ( When the pressure is 10 kg / cm 2 or more, the steel sheets are too close to each other and there is no escape area for the vaporized gas of the plating, and blow holes are easily generated, and the clearance B between the workpieces Wa and Wb is 0.3 mm. It was found that the bead melted down worse in the above cases. The maximum allowable values are a holding pressure of 10 kg / cm 2 and a gap B of 0.3 mm. The plate thickness, tolerance, type and amount of plating of the test pieces Wa and Wb are the same as those of the flanges La and Ua of the lower body L and the upper body U.

【0018】そこで燃料タンクを実際に量産する場合、
その管理幅を、例えば、5kg/cm2 の軽加 圧状態
から0.2mmのクリアランスに設定し、この間の状態
でフランジLa,Uaを挾持してレーザー溶接を行うこ
とができる。この管理幅を達成するためには、下部受け
治具1に取り付けられる各スペーサー15の厚さ(正確
には、下部受け治具1の上面からの突出高さ)Aを正し
く設定する必要がある。この厚さ設定方法の一例を図示
の燃料タンクの場合について次に説明する。
Therefore, when actually mass-producing fuel tanks,
The control width can be set to a clearance of 0.2 mm from a lightly pressurized state of 5 kg / cm 2 , for example, and the flanges La and Ua can be clamped to perform laser welding. In order to achieve this control width, it is necessary to correctly set the thickness A of each spacer 15 attached to the lower receiving jig 1 (more precisely, the protruding height from the upper surface of the lower receiving jig 1). . An example of this thickness setting method will be described below for the case of the illustrated fuel tank.

【0019】まず、燃料タンクの下体Lと上体Uの成形
プレス後のフランジLa,Uaのレーザー溶接部の厚さ
を、多数の下体Lと上体Uの多数のポイントについて測
定する。図5と図6は、測定ポイントの数を28とし、
各ポイントの最大値と最小値を表にしたものである(図
5は上体U、図6は下体L)。なお、測定ポイントの位
置は下体Lと上体Uにおいて同じであり、ポイント間隔
は4〜5cm程度である。
First, the thicknesses of the laser welded portions of the flanges La and Ua of the lower body L and the upper body U of the fuel tank after forming and pressing are measured at a large number of points on the lower body L and the upper body U. 5 and 6, the number of measurement points is 28,
The maximum value and the minimum value of each point are tabulated (FIG. 5 is upper body U, FIG. 6 is lower body L). The positions of the measurement points are the same on the lower body L and the upper body U, and the point interval is about 4 to 5 cm.

【0020】そして、各ポイントにおける押え幅Aを割
り出す。すなわち、 A1・・・上体Uと下体Lの重合せ板厚最大値 A2・・・上体Uと下体Lの重合せ板厚最小値 T1 MAX,T2 MAX・・・上体U、下体Lの板厚最大値 T1 MIN,T2 MIN・・・上体U、下体Lの板厚最小値 X・・・・素材公差=0.05mm a・・・・適正クリアランス最大値=0.2mm とすると、例えば、図5のポイント10での最大値T1
MAXは0.7、最小値T1 MINは0.69であり、図6の
ポイント10での最大値T2 MAXは0.74、最小値T2
MINは0.73であるので、 A1=T1 MAX+T2 MAX=0.7+0.74=1.44m
m A2=(T1 MIN−X)+(T2 MIN−X)=(0.69−
0.05)+(0.73−0.05)=1.32mm a≧A1−A2=1.44−1.32=0.12mm となる。
Then, the presser foot width A at each point is calculated. That is, A 1 ... maximum overlap plate thickness of upper body U and lower body L A 2 ... minimum overlap plate thickness of upper body U and lower body L T 1 MAX , T 2 MAX ... upper body Maximum plate thickness of U and lower body L 1 MIN , T 2 MIN ... Minimum plate thickness of upper body U and lower body X ... Material tolerance = 0.05 mm a ... Proper clearance maximum value = 0.2 mm, for example, the maximum value T 1 at point 10 in FIG.
MAX is 0.7, the minimum value T 1 MIN is 0.69, and the maximum value T 2 MAX at point 10 in FIG. 6 is 0.74 and the minimum value T 2
Since MIN is 0.73, A 1 = T 1 MAX + T 2 MAX = 0.7 + 0.74 = 1.44 m
m A 2 = (T 1 MIN -X) + (T 2 MIN -X) = (0.69-
0.05) + (0.73-0.05) = 1.32 mm a ≧ A 1 −A 2 = 1.44−1.32 = 0.12 mm.

【0021】これにより上体Uと下体Lの重合せ板厚の
振れ幅が0.12mmで適正クリアランス最大値0.2
mmより小さいことが確認されたので、上体Uと下体L
の押え幅Aは A=A2+a=1.32+0.2=1.52mm にすれば問題がないことが判る。
As a result, when the upper body U and the lower body L have a thickness deviation of 0.12 mm, the optimum clearance is 0.2.
Since it was confirmed that it is smaller than mm, upper body U and lower body L
It is understood that there is no problem if the pressing width A of A is A = A 2 + a = 1.32 + 0.2 = 1.52 mm.

【0022】このような確認を他のポイントについても
行い、各ポイントにおける板厚の変化と振れ幅の大きさ
を確認しながら、各ポイントにおけるスペーサー15の
厚さAを設定していけばよい。板厚の変化が少ないとこ
ろは共通のスペーサー15を使用し、板厚の変化が大き
いところには別のスペーサー15を用いるようにして、
外周全体を複数のスペーサーで対応するようにすればよ
い。
The above confirmation may be performed for other points, and the thickness A of the spacer 15 at each point may be set while confirming the change in the plate thickness and the magnitude of the runout width at each point. A common spacer 15 is used where there is little change in plate thickness, and a different spacer 15 is used where there is a large change in plate thickness.
The entire outer circumference may be made to correspond with a plurality of spacers.

【0023】次に、本発明のレーザー溶接方法を挾持装
置の作用とともに説明する。上記のようにして高さAを
決定された各スペーサー15を所定の位置にボルト16
で固定する。そして各シリンダ9を縮小させて各上部押
え治具8を図2の2点鎖線のように上に開き、下部受け
治具1の上に下体Lを、また下体Lの上に上体Uを順次
載せて各シリンダ9を伸長させる。この作動によって下
体Lと上体UのフランジLa,Uaは、下部受け治具1
と上部押え治具8とによって、所定のクリアランスから
所定の軽加圧状態の間で挾持される。
Next, the laser welding method of the present invention will be described together with the operation of the holding device. Place each spacer 15 whose height A has been determined as described above at a predetermined position by bolts 16
Fix with. Then, each cylinder 9 is contracted to open each upper pressing jig 8 upward as shown by the chain double-dashed line in FIG. 2, and place the lower body L on the lower receiving jig 1 and the upper body U on the lower body L. The cylinders 9 are sequentially placed and extended. By this operation, the flanges La and Ua of the lower body L and the upper body U are attached to the lower receiving jig 1.
The upper holding jig 8 and the upper holding jig 8 hold it between a predetermined clearance and a predetermined light pressure state.

【0024】上記の状態でレーザー溶接機17を作動さ
せてフランジLa,Uaを接合する。この際、レーザー
ビームの照射で被覆材がガスとなって蒸発するが、前記
のように被覆材であるPb−Sn合金の沸点(約200
0℃)が母材である鋼板の融点(約1500℃)よりも
高いので、その蒸発ガス量は少なく、しかも発生ガスは
フランジLa,Ua相互間の隙間から排出されるので、
接合部にブローホールが形成されて溶接強度が低下する
ようなことがない。またフランジLa,Ua相互間の隙
間はそれらの板厚との関係において最小に抑えられるの
で、ビードの融落ちが少なくなり、この点でも溶接強度
が強くなる。
In the above state, the laser welding machine 17 is operated to join the flanges La and Ua. At this time, the coating material becomes a gas and evaporates by the irradiation of the laser beam, but as described above, the boiling point of the Pb-Sn alloy (about 200
(0 ° C.) is higher than the melting point (about 1500 ° C.) of the base steel sheet, the amount of vaporized gas is small, and the generated gas is discharged from the gap between the flanges La and Ua.
Blowholes are not formed in the joint and welding strength is not reduced. Further, the gap between the flanges La and Ua is suppressed to the minimum in relation to the plate thickness thereof, so that the fusion of the bead is reduced, and the welding strength is also increased in this respect.

【0025】なお、上述した実施例では下部受け治具8
にスペーサー15を固定し押え幅が所定の範囲に収まる
ようにしたが、本発明はこれに限られるものではなく、
スペーサー15を上部押え治具1や他の部材に取り付け
たり、或いは上部押え治具8や下部受け治具1と一体に
する等、他の方法を用いてもよい。また被覆材も本発明
の要旨を逸脱しない範囲で種々適用することができるこ
とは言うまでもない。下部受け治具1と上部押え治具8
による挾持圧力、及び上体Uと下体Lの隙間Bの大きさ
は、上体Uと下体Lの材質や厚さ、重合せ枚数等によっ
て変化する。
In the embodiment described above, the lower receiving jig 8
Although the spacer 15 is fixed to the holder so that the holding width falls within a predetermined range, the present invention is not limited to this.
Other methods such as attaching the spacer 15 to the upper pressing jig 1 or another member, or integrating the spacer 15 with the upper pressing jig 8 or the lower receiving jig 1 may be used. Needless to say, various coating materials can be applied without departing from the scope of the present invention. Lower receiving jig 1 and upper holding jig 8
The holding pressure and the size of the gap B between the upper body U and the lower body L vary depending on the material and thickness of the upper body U and the lower body L, the number of superposed sheets, and the like.

【0026】[0026]

【発明の効果】上述したように、本発明のレーザー溶接
方法は、複数の被接合材の少なくとも一つが母材の融点
より低い融点と母材の融点より高い沸点を持つ被覆材で
被覆された被接合材を重ね合わせて、上部押え治具と下
部受け治具の間に被接合材を重ね合わせた厚さより僅か
に厚いか略等しいスペーサーを配設して被接合材を所定
のクリアランスから所定の軽加圧状態の間で挾持してレ
ーザー溶接を行い、レーザービームの照射でガス化した
被覆材の蒸発ガスが接合材相互間の隙間から排出される
ようにした構成とされているので、レーザー溶接の際に
被覆材の蒸発ガスの発生が比較的少なくて、被接合材に
突起部や凹部を設けて被接合材相互間の隙間をつくる必
要がなく、必要以上にフランジ部を幅広くしなくても接
合部のブローホールの発生を防ぐことができ、ビードの
融落ちも少ない良好な接合状態を得ることができる。ま
た、車体内蔵型燃料タンク等の場合は、外周フランジを
狭くできる分だけ全体容量を大きくすることができる等
の効果がある。
As described above, in the laser welding method of the present invention, at least one of a plurality of materials to be joined is coated with a coating material having a melting point lower than the melting point of the base material and a boiling point higher than the melting point of the base material. Stacking the materials to be bonded together, and placing a spacer that is slightly thicker or approximately equal to the thickness of the materials to be bonded between the upper holding jig and the lower receiving jig, and set the materials to be bonded at a predetermined clearance. Since the laser welding is performed by sandwiching between the light pressure states, the vaporized gas of the coating material gasified by the laser beam irradiation is discharged from the gap between the bonding materials, Evaporation gas of the coating material is relatively small during laser welding, and there is no need to provide protrusions or recesses in the materials to be joined to create a gap between the materials to be joined. Blow-ho at the joint without It is possible to prevent the occurrence, melting off of the bead can be obtained even less good bonding state. Further, in the case of a fuel tank with a built-in vehicle body, there is an effect that the entire capacity can be increased by the amount that the outer peripheral flange can be narrowed.

【0027】また、本発明に係る被接合材の挾持装置
は、被接合材の接合フランジ部を支える下部受け治具
と、前記接合フランジ部の外側部に下部受け治具に着脱
可能に複数個配設されたスペーサーと、該スペーサーに
対応して設けられて駆動部材により開閉され、被接合材
を着脱可能に挾持する上部押え治具とからなり、前記ス
ペーサーは、被接合材の接合フランジ部を重ね合わせた
厚さより僅かに厚いか略等しい厚さの間とした構成とさ
れているので、被接合材のレーザー溶接に際して生じる
ガスを的確に排出して、ブローホールの発生を防止する
ことができる。
Further, the holding device for holding the joined material according to the present invention comprises a lower receiving jig for supporting the joining flange portion of the joined material, and a plurality of detachable detachable jigs on the outside portion of the joining flange portion. The spacer is provided and an upper holding jig that is provided corresponding to the spacer and is opened and closed by a driving member and holds the material to be joined detachably. The spacer is a joining flange portion of the material to be joined. Since it is configured to be slightly thicker than or substantially equal to the overlapping thickness, it is possible to accurately discharge the gas generated during laser welding of the materials to be joined and prevent the occurrence of blow holes. it can.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明に係る被接合材の挾持装置の一実施例
を示すもので、一部を破断した平面図である。
FIG. 1 is a plan view showing an embodiment of a device for holding a material to be joined according to the present invention, in which a part thereof is cut away.

【図2】 図1の(II−II)線部分の断面図である。FIG. 2 is a cross-sectional view taken along line (II-II) of FIG.

【図3】 下部受け治具と上部押え治具による上体と下
体のフランジの挾持状態を示す略図である。
FIG. 3 is a schematic diagram showing a state where the upper and lower body flanges are held by a lower receiving jig and an upper holding jig.

【図4】 下部受け治具と上部押え治具によるフランジ
の挾持圧力とフランジの隙間に対するピンホール数等の
関係を示す図である。
FIG. 4 is a diagram showing a relationship between a clamping pressure of a flange by a lower receiving jig and an upper pressing jig and a number of pinholes with respect to a gap between the flanges.

【図5】 上体の各ポイントにおける板厚の変化幅を示
す図である。
FIG. 5 is a diagram showing the variation width of the plate thickness at each point on the upper body.

【図6】 下体の各ポイントにおける板厚の変化幅を示
す図である。
FIG. 6 is a diagram showing the variation width of the plate thickness at each point of the lower body.

【符号の説明】[Explanation of symbols]

L 下体(被接合材) La フランジ(接合フランジ部) U 上体(被接合材) Ua フランジ(接合フランジ部) 1 下部受け治具 8 上部押え治具 9 シリンダ(駆動部材) 15 スペーサー 17 レーザー溶接機 A スペーサーの厚さ(高さ) B 被接合材の隙間(クリアランス) L Lower body (material to be joined) La Flange (joint flange portion) U Upper body (material to be joined) Ua Flange (joint flange portion) 1 Lower receiving jig 8 Upper holding jig 9 Cylinder (driving member) 15 Spacer 17 Laser welding Machine A Spacer thickness (height) B Bonding material clearance (clearance)

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 複数の被接合材の少なくとも一つが母材
の融点より低い融点と母材の融点より高い沸点を持つ被
覆材で被覆された被接合材を重ね合わせて、上部押え治
具と下部受け治具の間に被接合材を重ね合わせた厚さよ
り僅かに厚いか略等しいスペーサーを配設して被接合材
を所定のクリアランスから所定の軽加圧状態の間で挾持
してレーザー溶接を行い、レーザービームの照射でガス
化した被覆材の蒸発ガスが接合材相互間の隙間から排出
されるようにしたことを特徴とするレーザー溶接方法。
1. An upper holding jig, wherein at least one of a plurality of materials to be bonded is covered with a material having a melting point lower than the melting point of the base material and a coating material having a boiling point higher than the melting point of the base material. A spacer that is slightly thicker or approximately equal to the thickness of the materials to be bonded is placed between the lower receiving jigs, and the materials to be bonded are held between a predetermined clearance and a predetermined light pressure state by laser welding. And a vaporized gas of the coating material gasified by laser beam irradiation is discharged from the gap between the joining materials.
【請求項2】 被接合材を鉛を主体とした錫等との合金
メツキ鋼板としたことを特徴とする請求項1記載のレー
ザー溶接方法。
2. The laser welding method according to claim 1, wherein the material to be bonded is an alloy plated steel plate mainly composed of lead and tin or the like.
【請求項3】 被接合材の接合フランジ部を支える下部
受け治具と、前記接合フランジ部の外側部に下部受け治
具に着脱可能に複数個配設されたスペーサーと、該スペ
ーサーに対応して設けられて駆動部材により開閉され、
被接合材を着脱可能に挾持する上部押え治具とからな
り、前記スペーサーは、被接合材の接合フランジ部を重
ね合わせた厚さより僅かに厚いか略等しい厚さの間とし
たことを特徴とする被接合材の挾持装置。
3. A lower receiving jig for supporting a joining flange portion of a material to be joined, a plurality of spacers detachably arranged on the lower receiving jig on an outer portion of the joining flange portion, and a spacer corresponding to the spacer. Is provided and opened and closed by the drive member,
An upper holding jig for removably holding the material to be joined, wherein the spacer has a thickness slightly larger than or substantially equal to the thickness of the joined flange portions of the material to be joined. A device for holding the materials to be joined.
JP6041607A 1994-03-11 1994-03-11 Laser welding method and device for clamping workpieces Expired - Fee Related JP2711068B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6041607A JP2711068B2 (en) 1994-03-11 1994-03-11 Laser welding method and device for clamping workpieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6041607A JP2711068B2 (en) 1994-03-11 1994-03-11 Laser welding method and device for clamping workpieces

Publications (2)

Publication Number Publication Date
JPH07251283A true JPH07251283A (en) 1995-10-03
JP2711068B2 JP2711068B2 (en) 1998-02-10

Family

ID=12613056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6041607A Expired - Fee Related JP2711068B2 (en) 1994-03-11 1994-03-11 Laser welding method and device for clamping workpieces

Country Status (1)

Country Link
JP (1) JP2711068B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020050881A (en) * 2000-12-22 2002-06-28 신현준 Method For Manufacturing Vessel And Device For Manufacturing Vessel
JP2008080340A (en) * 2006-09-25 2008-04-10 Seiko Techno Develop Co Ltd Workpiece fixing/holding device and workpiece welding method using the same
JP2009000693A (en) * 2007-06-19 2009-01-08 Honda Motor Co Ltd Overlapped metal plate clamp method and metal plate overlapping structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020050881A (en) * 2000-12-22 2002-06-28 신현준 Method For Manufacturing Vessel And Device For Manufacturing Vessel
JP2008080340A (en) * 2006-09-25 2008-04-10 Seiko Techno Develop Co Ltd Workpiece fixing/holding device and workpiece welding method using the same
JP2009000693A (en) * 2007-06-19 2009-01-08 Honda Motor Co Ltd Overlapped metal plate clamp method and metal plate overlapping structure

Also Published As

Publication number Publication date
JP2711068B2 (en) 1998-02-10

Similar Documents

Publication Publication Date Title
US4644129A (en) Apparatus and method for edge welding sheet metal
JP5071451B2 (en) Joining materials, joints and car bodies
US5324913A (en) Method and apparatus for laser welding
US20090314750A1 (en) Gap control device and laser lap welding method
JP2000197969A (en) Blank for integrally forming and forming method thereof
FR2753117A1 (en) METHOD FOR MANUFACTURING A LAMINATED STRUCTURE
JPH04157263A (en) Manufacture of metal gasket
US4847467A (en) Laser welding clamp
JPH02274384A (en) Indirect spot welding
JPH07251283A (en) Method for laser beam welding and device for holding member to be joined
JP5366499B2 (en) Welding method
JP2002331381A (en) Welding device for parts
KR101059372B1 (en) Laser welding method of plated steel sheet
CN112975172B (en) Laser welding tool
US8528178B2 (en) Bristle and plate subassembly fixture and manufacturing method
JPH07332500A (en) Metallic gasket and manufacture thereof
JP4409038B2 (en) Laminated laser welding method for plated steel sheets
JPH0716776A (en) Laser welding method and device of lap joint part
JPH02165873A (en) Sheet metal welding method
JPH06182571A (en) Method for welding metallic members
JP2000326080A (en) Laser beam welding method
JP2936942B2 (en) Butt laser welding method for thin plate
JP2001276990A (en) Laser lap welding structure of plating steel plate
JPS6356366A (en) Lap welding method
JPH10113783A (en) Laser beam welding method for plated steel plate

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 19970930

LAPS Cancellation because of no payment of annual fees