JPH0534861Y2 - - Google Patents
Info
- Publication number
- JPH0534861Y2 JPH0534861Y2 JP1986196300U JP19630086U JPH0534861Y2 JP H0534861 Y2 JPH0534861 Y2 JP H0534861Y2 JP 1986196300 U JP1986196300 U JP 1986196300U JP 19630086 U JP19630086 U JP 19630086U JP H0534861 Y2 JPH0534861 Y2 JP H0534861Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- spatter
- welding
- workpiece
- height
- 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.)
- Expired - Lifetime
Links
- 238000003466 welding Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 23
- 230000006378 damage Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000009191 jumping Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000036544 posture Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は金属缶の缶胴を製造するについて、
缶胴の周方向端縁どうしをレーザ溶接法によつて
溶接する装置に関する。[Detailed explanation of the invention] [Industrial application field] This invention is for manufacturing can bodies of metal cans.
The present invention relates to a device for welding circumferential edges of can bodies together using a laser welding method.
缶胴の端縁溶接は、電気抵抗熱を利用する抵抗
溶接法によつて行うのが一般的である。抵抗溶接
法では溶接個所に付着している油脂、水分、錆あ
るいは印刷層などを除去する前処理作業が不可欠
となる。
The edges of the can body are generally welded by a resistance welding method that utilizes electrical resistance heat. In the resistance welding method, pretreatment work is essential to remove oil, moisture, rust, or printed layers adhering to the welding area.
こうした前処理作業を省略し溶接速度を向上す
ることを目的として、レーザ溶接法によつて缶胴
の端縁溶接を行うことが従来から提案されてい
る。例えば本出願人による特開昭59−76690号公
報はそのひとつである。 In order to omit such pre-treatment work and improve welding speed, it has been proposed to perform edge welding of can bodies by laser welding. For example, Japanese Patent Application Laid-open No. 76690/1983 by the present applicant is one of them.
本考案者は炭酸ガスレーザによる缶胴端縁の溶
接の実用化研究を数年来行つており、第６図に示
す出力1KWの溶接装置で量産条件による端縁溶
接の実用化を試みてきた。この装置は缶胴素材１
を支持するテーブル２と、缶胴端縁１ａ，１ｂを
テーブル２に押しつけて保持する一対のローラ３
０とを有し、缶胴素材１をローラ３０で溶接姿勢
に保持して矢印Ａ方向に送り移動させながら、テ
ーブル２に対向する加工ヘツド３からレーザビー
ムを照射して溶接を行う。加工ヘツド３の内部に
は集光レンズ５が配置してあり、その下端にアシ
ストガスを吹き出すためのノズル７を備えてい
る。８はその吹出口である。 The present inventor has been researching the practical application of can body edge welding using a carbon dioxide gas laser for several years, and has attempted to put edge welding to practical use under mass production conditions using a welding device with an output of 1KW as shown in Figure 6. This device is used for can body material 1.
and a pair of rollers 3 that press and hold the edges 1a and 1b of the can body against the table 2.
0, and while the can body material 1 is held in a welding position by rollers 30 and fed and moved in the direction of arrow A, welding is performed by irradiating a laser beam from a processing head 3 facing the table 2. A condensing lens 5 is arranged inside the processing head 3, and a nozzle 7 for blowing out assist gas is provided at the lower end of the condensing lens 5. 8 is the air outlet.
上記の溶接装置では、スパツタが溶接個所の周
辺に飛散しやすく、缶胴の印刷面に傷や異物の付
着などを生じやすい。とくに、チタンや鉛などの
顔料を含む無機質系塗料で印刷された缶胴素材１
を溶接する場合にスパツタが飛散しやすく、スパ
ツタがノズル７から加工ヘツド３内に飛び込んで
集光レンズ５の表面に衝突して付着し、レンズ性
能を低下させたりレンズを破壊する点に問題があ
る。炭酸ガスレーザの発振波長が赤外領域に属し
ている関係で、集光レンズ５は赤外線透過効率の
高い素材で形成されていて高価であり、そのラツ
ピングや再コーテイング等の補修費用も高くつく
ことから、集光レンズ５の性能低下や破壊を防止
することは、大量生産を実現するうえで不可避の
事項となる。 In the above-mentioned welding apparatus, spatter is likely to scatter around the welding location, and the printed surface of the can body is likely to be scratched or foreign matter may adhere. In particular, can body materials 1 printed with inorganic paints containing pigments such as titanium and lead
When welding, spatter easily scatters, and the spatter jumps into the processing head 3 from the nozzle 7 and collides with and adheres to the surface of the condenser lens 5, causing a problem in that the lens performance is degraded or the lens is destroyed. be. Since the oscillation wavelength of the carbon dioxide laser belongs to the infrared region, the condenser lens 5 is made of a material with high infrared transmission efficiency and is expensive, and repair costs such as wrapping and recoating are also expensive. Preventing performance deterioration and destruction of the condensing lens 5 is an unavoidable matter in realizing mass production.
前述のような集光レンズ５の損傷を避けるた
め、従来はノズル７の吹出口８の開口径をできる
だけ小さく設定し、スパツタがノズル７内に飛び
込むのを阻止していた。具体的には、第１図の想
像線で示すようにレーザビームの作業部径ｄを
0.2mm、ノズル７の吹出口８の口径Ｅを1.5mmと
し、吹出口８の先端とワーク表面との間隔ｈを２
mmに設定していた。 In order to avoid damage to the condensing lens 5 as described above, conventionally the opening diameter of the outlet 8 of the nozzle 7 is set as small as possible to prevent spatter from jumping into the nozzle 7. Specifically, as shown by the imaginary line in Figure 1, the working part diameter d of the laser beam is
0.2 mm, the diameter E of the outlet 8 of the nozzle 7 is 1.5 mm, and the distance h between the tip of the outlet 8 and the work surface is 2.
It was set to mm.
スパツタの飛跡Ｆは基本的に第１図に示すよう
な逆円錐台形になるが、アシストガスの影響と飛
散スパツタどうしの衝突による二次飛散、三次飛
散で、吹出口８に向かつて跳ね飛ばされるスパツ
タが現れ、これが集光レンズ５の破壊の原因にな
ると推測される。
The trajectory F of the spatter is basically in the shape of an inverted truncated cone as shown in Figure 1, but due to the influence of the assist gas and secondary and tertiary scattering due to the collision of the spattered spatters, they are blown off towards the air outlet 8. It is assumed that spatter appears and causes the condenser lens 5 to be destroyed.
このため、上記のように吹出口８の開口径を小
さくしても、集光レンズ５の損傷度合が若干減る
だけで損傷を解消するには至らず、約２週間前後
のレンズ寿命が得られるに止まつていた。つま
り、単に吹出口８の開口径を小さくしても、スパ
ツタがノズル７内に飛び込む確率が僅かに低下す
るに止まる。 Therefore, even if the aperture diameter of the air outlet 8 is made smaller as described above, the degree of damage to the condensing lens 5 will only be slightly reduced, but the damage will not be eliminated, and the lens life will be approximately two weeks. It stopped at . In other words, even if the opening diameter of the air outlet 8 is simply made smaller, the probability that spatter will fly into the nozzle 7 will only slightly decrease.
集光レンズ５の下面側を保護カバーで遮閉する
ことを検討したが、このカバーも集光レンズ５と
同一素材で形成されるため、その交換を頻繁に行
うことを考慮するとコストが高く付いて適当では
ない。 We considered shielding the bottom side of the condenser lens 5 with a protective cover, but since this cover is also made of the same material as the condenser lens 5, the cost would be high considering that it would have to be replaced frequently. It's not appropriate.
吹出口８の開口径を小さくすることにより、溶
接性能にも影響があらわれ、溶着不良を生じるこ
とがあつた。これは、缶胴素材１の厚みが0.1〜
0.4mmしかなく過熱により孔があきやすいことか
ら、アシストガスによるワーク表面の適度の不活
性化が不可欠なのであるが、吹出口８を絞ること
でアシストガスがスポツト状に収斂されて噴出速
度が速くなるため、レーザビームの集束点がアシ
ストガスで完全に覆われ、ワーク表面と空気中の
酸素の接触が断たれて、ワーク表面のレーザ吸収
能が低下するためである。 By reducing the opening diameter of the air outlet 8, welding performance was also affected, and poor welding could occur. This means that the thickness of can body material 1 is 0.1~
Since it is only 0.4 mm and easily forms holes due to overheating, it is essential to inactivate the work surface appropriately with assist gas, but by narrowing the blowout port 8, the assist gas is converged into a spot shape, increasing the jetting speed. This is because the focal point of the laser beam is completely covered with the assist gas, and the contact between the workpiece surface and oxygen in the air is cut off, reducing the laser absorption ability of the workpiece surface.
因に、ワーク表面からのスパツタが集光レンズ
５に飛び込んで付着するのを防止するために、集
光レンズ５を長焦点レンズにしてワーク表面から
遠去けたり、ワーク表面にアシストガス（不活性
ガス）を吹き付ける方法が公知である。（特開昭
51−84652号公報）。しかし、そこでは集光レンズ
５をワーク表面からどの程度まで離すのか、につ
いてまでは実用的に言及されていなかつた。 Incidentally, in order to prevent spatter from the workpiece surface from jumping into the condensing lens 5 and adhering to it, the condensing lens 5 can be made a long focal length lens so that it can be moved away from the workpiece surface, or an assist gas (free gas) can be applied to the workpiece surface. A method of spraying active gas) is known. (Tokukai Akira
51-84652). However, there was no practical mention of how far the condenser lens 5 should be separated from the workpiece surface.
そこで本考案の目的は、ノズル７の吹出口８の
ワーク表面からの高さを経験的に求めて実用可能
とし、以て集光レンズ５の損傷と溶接不良を確実
に防止してレーザ溶接による缶胴の量産性を実現
するにある。 Therefore, the purpose of the present invention is to empirically determine the height of the outlet 8 of the nozzle 7 from the surface of the workpiece to make it practical, thereby reliably preventing damage to the condensing lens 5 and poor welding, and thereby preventing laser welding from occurring. The purpose is to realize mass production of can bodies.
本考案では、ノズル７の吹出口８のワーク表面
からの高さおよび開口度を、スパツタの二次衝突
領域を避けながら、できるだけワーク表面に近付
けて設定することにより、集光レンズ５の損傷を
防止するにある。具体的には、加工ヘツド３に、
これの内部の集光レンズ５で集束されるレーザー
ビームの光路上にアシストガスを吹き出すノズル
７を配設し、ノズル７を挟む対向位置に缶胴素材
１を溶接姿勢に保持する一対のワーク押圧手段１
０を備えている缶胴の製造装置において、ノズル
７の下端近傍でワーク送り方向Ａの下手側にスパ
ツタを真空引きする吸塵管２１を配置してあるこ
と、前記ノズル７の吹出口８のワーク表面からの
高さＨを７〜15mmに設定したことを要件とする。
In the present invention, damage to the condenser lens 5 is avoided by setting the height and opening degree of the outlet 8 of the nozzle 7 from the workpiece surface as close to the workpiece surface as possible while avoiding the secondary collision area of spatter. To prevent it. Specifically, in the processing head 3,
A nozzle 7 for blowing out assist gas is arranged on the optical path of the laser beam focused by the condensing lens 5 inside this, and a pair of workpiece presses that hold the can body material 1 in a welding posture are placed at opposing positions sandwiching the nozzle 7. Means 1
0, a dust suction pipe 21 for vacuuming spatter is arranged on the downstream side in the work feed direction A near the lower end of the nozzle 7, and the workpiece at the outlet 8 of the nozzle 7 is provided. The requirement is that the height H from the surface is set to 7 to 15 mm.
ここで吹出口８のワーク表面からの高さＨを７
〜15mmとしたのは、７mmを下回るとスパツタが二
次衝突して集光レンズ５に飛び込み付着する可能
性があり、15mmを上回るとノズル７の吹出口８か
ら噴射される前記アシストガスのワーク表面への
到達が損なわれるからである。 Here, the height H of the air outlet 8 from the work surface is 7
The reason why the setting is ~15 mm is because if it is less than 7 mm, spatter may cause a secondary collision and fly into the condensing lens 5 and adhere to it. This is because reaching the surface is impaired.
〔第１実施例〕
第１図ないし第３図は本考案の第１実施例を示
している。[First Embodiment] FIGS. 1 to 3 show a first embodiment of the present invention.
第２図において、缶胴素材１を支持するテーブ
ル２と、レーザビームを照射する加工ヘツド３と
を上下対向状に配置する。 In FIG. 2, a table 2 that supports a can body material 1 and a processing head 3 that irradiates a laser beam are arranged to face each other vertically.
缶胴素材１は0.1〜0.4mm厚、通常は0.2mm厚の鋼
板からなり、前工程でリング状に曲げ加工され、
その周方向の端縁１ａ，１ｂどうしが図外の治具
に案内されて重合され、矢印Ａ方向へと送られ
る。治具から送り出された缶胴素材１は、テーブ
ル２に支持されるとともに第３図に示すワーク押
圧手段１０で溶接姿勢に保持される。 The can body material 1 is made of a steel plate with a thickness of 0.1 to 0.4 mm, usually 0.2 mm, and is bent into a ring shape in the previous process.
The circumferential edges 1a and 1b are guided by a jig (not shown), overlapped, and sent in the direction of arrow A. The can body material 1 sent out from the jig is supported by a table 2 and held in a welding position by workpiece pressing means 10 shown in FIG.
加工ヘツド３の内部には筒状のホルダ４を介し
て支持される集光レンズ５を有する。ホルダ４の
周囲と集光レンズ５の下方とは、筒状のノズルホ
ルダ６と、このホルダの下端開口に固定されるノ
ズル７とで覆われている。ノズルホルダ６で区画
された空間内にアルゴンやヘリウムなど不活性の
アシストガスを送給すると、アシストガスがノズ
ル７の先端の吹出口８から溶接個所に向かつて吹
き出る。 The processing head 3 has a condenser lens 5 supported by a cylindrical holder 4 inside. The periphery of the holder 4 and the lower part of the condenser lens 5 are covered by a cylindrical nozzle holder 6 and a nozzle 7 fixed to the lower end opening of the holder. When an inert assist gas such as argon or helium is fed into the space partitioned by the nozzle holder 6, the assist gas is blown out from an outlet 8 at the tip of the nozzle 7 towards the welding point.
図外のレーザ発振源で生成されたレーザビーム
は加工ヘツド３に案内され、集光レンズ５で集束
されて前記吹出口８と対向するワーク表面に焦点
を結ぶ。この焦点でのビーム径、つまり作業部径
ｄは0.2mmとやや大きめに設定した。 A laser beam generated by a laser oscillation source (not shown) is guided to a processing head 3, focused by a condenser lens 5, and focused on the workpiece surface facing the air outlet 8. The beam diameter at this focal point, that is, the diameter of the working part d, was set to be slightly large at 0.2 mm.
ノズル７から噴出されるアシストガスの噴出速
度を低下し、空気中の酸素がレーザの作業部に供
給されるようにするために、第１図の実線で示す
ごとくノズル７の吹出口８の開口径Ｄを2.5mmに
設定する。さらに、レンズ照射によつて生じるス
パツタのノズル７内への飛び込みを防止するため
に、ワーク表面から吹出口８の先端までの高さＨ
を７mmに設定した。 In order to reduce the ejection speed of the assist gas ejected from the nozzle 7 and to supply oxygen in the air to the working part of the laser, the outlet 8 of the nozzle 7 is opened as shown by the solid line in FIG. Set the diameter D to 2.5mm. Furthermore, in order to prevent spatter caused by lens irradiation from jumping into the nozzle 7, the height H from the workpiece surface to the tip of the air outlet 8 is
was set to 7 mm.
既に述べたように、スパツタは逆円錐台形状に
拡がりながら飛散し、周辺部に落下する。こうし
た飛散スパツタで問題となるのは、衝突によつて
ノズル７に向かつて飛翔する二次飛散f2および三
次飛散f3するスパツタである。この問題のスパツ
タは逆円錐台形状の一次飛散途中に生じる一次衝
突と、二次飛散途中に生じる飛散スパツタどうし
の二次衝突によつて生じる。極めて低い確率で三
次衝突により四次飛散を生じることもあるが、そ
の飛散エネルギーは複数回の衝突によるエネルギ
ー損失によつて微少なものとなり、集光レンズ５
に悪影響を及ぼすものではない。 As already mentioned, the spatter spreads out in the shape of an inverted truncated cone and falls to the surrounding area. The problem with such flying spatter is secondary flying spatter f2 and tertiary flying spatter f3 towards the nozzle 7 due to collision. The spatter in this problem is caused by a primary collision that occurs during the primary scattering of an inverted truncated conical shape, and a secondary collision between the scattered spatters that occurs during the secondary scattering. Although there is an extremely low probability that tertiary collisions may cause quaternary scattering, the scattering energy becomes minute due to energy loss due to multiple collisions, and the condenser lens 5
It does not have a negative impact on the
本考案者は吹出口８のワーク表面からの高さＨ
を徐々に高くしながらスパツタの到達状況を観察
したが、高さＨが２〜６mmの範囲にあるとスパツ
タのノズル７への飛び込みが比較的多く、集光レ
ンズ５へのスパツタ付着が僅かではあるが認めら
れ、その損傷を防止するには不安が残ることを確
認した。高さＨを７mmとする場合には、スパツタ
のノズル７への飛び込みが若干見受けられるが、
集光レンズ５へのスパツタ付着はもちろんレンズ
表面の衝突傷も皆無となつた。このことから、ス
パツタどうしの二次衝突領域の上下高さの限界値
に最も近い高さＨを７mmとした。 The inventor has determined that the height H of the air outlet 8 from the workpiece surface is
We observed the arrival of spatter while gradually increasing the height H, and found that when the height H was in the range of 2 to 6 mm, a relatively large amount of spatter flew into the nozzle 7, and only a small amount of spatter adhered to the condenser lens 5. It was confirmed that there was some damage, and that there remained concerns about preventing such damage. When the height H is 7 mm, some spatter can be seen jumping into the nozzle 7,
Not only was there no spatter adhering to the condenser lens 5, but there was also no collision damage on the lens surface. From this, the height H closest to the vertical height limit of the secondary collision area between spatters was set to 7 mm.
第３図においてワーク押圧手段１０は、缶胴素
材１の送り方向Ａと直交する左右２個所にノズル
７を挾んで設けられる押えデイスク１１，１１
と、このデイスク１１を回転自在に支持する支軸
１２，１２と、姿勢変更部材１３とからなる。押
えデイスク１１は円盤状、好ましくは偏平な逆摺
鉢形に形成してあり、連れ回り回転しながらその
周縁下面で缶胴素材１をテーブル２に押し付けて
缶胴端縁１ａ，１ｂどうしが僅かにラツプする溶
接姿勢に保持する。支軸１２，１２は押えデイス
ク１１，１１をこれが上すぼまり状に傾斜した姿
勢となるよう回転自在に支持する。 In FIG. 3, the workpiece pressing means 10 includes presser disks 11 and 11 provided at two positions on the left and right, which are orthogonal to the feeding direction A of the can body material 1, sandwiching the nozzle 7 therebetween.
It consists of support shafts 12, 12 that rotatably support this disk 11, and an attitude changing member 13. The presser disk 11 is formed into a disk shape, preferably a flat inverted mortar shape, and presses the can body material 1 against the table 2 with the lower surface of its periphery while rotating together, so that the edges 1a and 1b of the can body are slightly pressed against each other. Hold in a wrap welding position. The support shafts 12, 12 rotatably support the presser disks 11, 11 so that the presser disks 11, 11 are inclined upwardly.
姿勢変更部材１３は支軸１２を直交状に支持す
る第１アーム１４と、このアーム１４を支持する
第２アーム１５とからなる。第１アーム１４は第
２アームに設けられたあり溝状のスライド溝１６
に上下摺動可能に支持され、任意のスライド位置
にボルト１７で固定される。第２アーム１５は固
定壁１８にねじ込まれるボルト１９まわりに上下
摺動可能に支持する。両アーム１４，１５の姿勢
を調節することにより、押えデイスク１１の缶胴
素材１に対する押圧姿勢を変更でき、従来のロー
ラ３０による素材保持構造に比べて、缶胴端縁１
ａ，１ｂの接近位置を押さえて缶胴素材１の位置
保持をより正確に行うことができる。なお、缶胴
端縁１ａ，１ｂどうしは突き合わせた状態で溶接
することもある。 The attitude changing member 13 includes a first arm 14 that orthogonally supports the support shaft 12 and a second arm 15 that supports this arm 14. The first arm 14 is a dovetail-shaped slide groove 16 provided in the second arm.
It is supported in a vertically slidable manner and fixed at an arbitrary sliding position with a bolt 17. The second arm 15 is vertically slidably supported around a bolt 19 screwed into the fixed wall 18. By adjusting the postures of both arms 14 and 15, the pressing posture of the presser disk 11 against the can body material 1 can be changed.
By holding down the approach positions of a and 1b, the position of the can body material 1 can be held more accurately. Note that the can body edges 1a and 1b may be welded together in abutted state.
スパツタの飛散によつて缶胴表面が傷付けられ
たり、スパツタ自体が缶胴表面に付着して溶接部
の周辺が汚損されることを防ぐために、第２図に
示すようにノズル７の下端近傍に吸塵管２１を設
け、通路２２を介して真空源２３に連通させてあ
る。この吸塵管２１は送り方向Ａの下手側でノズ
ル７にできるだけ接近して配置することが好まし
く、前述のように一対の押えデイスク１１，１１
を送り方向Ａと直交する位置に配置すると、最も
好適な位置に吸塵管２１を配設できる。 In order to prevent the surface of the can body from being damaged by flying spatters, and to prevent the spatters themselves from adhering to the surface of the can body and contaminating the area around the welding area, a A dust suction pipe 21 is provided and communicated with a vacuum source 23 via a passage 22. It is preferable that this dust suction pipe 21 is arranged as close as possible to the nozzle 7 on the downstream side in the feeding direction A, and as described above, the dust suction pipe 21
By arranging the dust suction pipe 21 at a position perpendicular to the feeding direction A, the dust suction pipe 21 can be arranged at the most suitable position.
以上のような缶胴製造装置で缶胴端縁１ａ，１
ｂの溶接を行うと、スパツタの二次あるいは三次
飛散によつて集光レンズ５が損傷を受けることを
防止でき、スパツタが周囲に飛び散つて缶胴表面
に付着し、あるいは傷付けることを解消できた。 In the can body manufacturing apparatus as described above, can body edges 1a, 1
By performing the welding step b, it is possible to prevent the condensing lens 5 from being damaged by secondary or tertiary spatter scattering, and it is also possible to prevent spatters from being scattered around and adhering to or damaging the can body surface. Ta.
なお、吹出口８のワーク表面からの高さＨはア
シストガスの噴出状況に支障を生じない範囲、つ
まりアシストガスのワーク表面への到達度が損な
われない範囲で大きくすることができ、この高さ
Ｈは15mmを限界とする。 Note that the height H of the blower outlet 8 from the work surface can be increased within a range that does not interfere with the blowout of the assist gas, that is, within a range that does not impair the reach of the assist gas to the work surface. The maximum height is 15mm.
（第２実施例）
第４図および第５図は本考案の第２実施例をし
す。これでは、ノズル７の外面に副ノズル２５を
二重筒状に設けその先端の吹出口２６からもアシ
ストガスを噴き出すようにした点と、両ノズル
７，２５と缶胴素材１との間に、スパツタのノズ
ル７内への飛散を防止する防護板２７を配設した
点とが、第１実施例と異なる。防護板２７のほぼ
中央には第５図に示すように、レーザビームを通
過させるビーム孔２８が通設してあり、このビー
ム孔２８を囲んで複数個のガス孔２９が環状に通
設されている。(Second Embodiment) FIGS. 4 and 5 show a second embodiment of the present invention. In this case, the secondary nozzle 25 is provided in a double cylindrical shape on the outer surface of the nozzle 7, and the assist gas is also spouted from the blow-off port 26 at the tip thereof, and between both nozzles 7, 25 and the can body material 1 This embodiment differs from the first embodiment in that a protection plate 27 is provided to prevent spatter from flying into the nozzle 7. As shown in FIG. 5, a beam hole 28 through which the laser beam passes is provided approximately in the center of the protection plate 27, and a plurality of gas holes 29 are provided in an annular manner surrounding this beam hole 28. ing.
両ノズル７，２５から吹き出されたアシストガ
スは、ビーム孔２８とガス孔２９を通つてワーク
表面に達するが、両孔２８，２９によつてガス流
が分散されるのでワーク表面でのアシストガスの
流速が低下され、その拡散領域も拡がる。これに
より、空気中の酸素が適度にワーク表面に接触し
て、ワーク表面のレーザ吸収能が向上され、缶胴
端縁１ａ，１ｂが熱不足で溶着不良を生じること
を確実に防止できる。 The assist gas blown out from both nozzles 7 and 25 passes through the beam hole 28 and gas hole 29 and reaches the workpiece surface, but since the gas flow is dispersed by both holes 28 and 29, the assist gas does not reach the workpiece surface. The flow velocity of is reduced and its diffusion area is also expanded. As a result, oxygen in the air comes into contact with the workpiece surface in an appropriate manner, improving the laser absorption ability of the workpiece surface, and reliably preventing welding defects at the can body edges 1a and 1b due to insufficient heat.
（別実施態様例）
吹出口８の開口径Ｄは若干拡大しても溶接性に
支障を生じることはなく、その限界値は３mmであ
つた。(Another Embodiment) Even if the opening diameter D of the air outlet 8 was slightly enlarged, weldability was not affected, and its limit value was 3 mm.
ワーク押圧手段１０は従来のローラ式のものに
換えることもできる。 The workpiece pressing means 10 can also be replaced with a conventional roller type one.
レーザの発振方法はパルス状でも連続状でもよ
い。 The laser oscillation method may be pulsed or continuous.
吸塵管２１のスパツタ吸引作用を補助すること
と、適度の空気がノズル７から吹き出されるアシ
ストガスに混入して、ワーク表面でのレーザ吸収
能を向上することのために、吸塵管２１と対向す
る位置に空気吹出しノズルを配設してもよい。 In order to assist the spatter suction action of the dust suction pipe 21 and to mix a suitable amount of air into the assist gas blown out from the nozzle 7 to improve the laser absorption ability on the workpiece surface, a pipe is provided opposite to the dust suction pipe 21. An air blowing nozzle may be provided at a position where
以上説明したように本考案では、ノズル７の吹
出口８のワーク表面からの高さＨを７〜15mmと
し、スパツタの二次衝突領域を避けながらワーク
表面にできるだけ近付けて設定し、スパツタの二
次飛散あるいは三次飛散によつてスパツタがノズ
ル７内に飛び込むことを防止できるようにした。
したがつて、スパツタが集光レンズ５に衝突し付
着することを解消して該レンズ５の損傷を確実に
防止でき、これにより缶胴製造装置のランニング
コストを著しく低減し、レーザ溶接による缶胴の
大量生産が実現できるものとなつた。
As explained above, in the present invention, the height H of the outlet 8 of the nozzle 7 from the work surface is set to 7 to 15 mm, and it is set as close as possible to the work surface while avoiding the secondary collision area of spatter. It is possible to prevent spatter from jumping into the nozzle 7 due to secondary or tertiary scattering.
Therefore, it is possible to prevent the spatter from colliding with and adhering to the condensing lens 5, thereby reliably preventing damage to the lens 5, thereby significantly reducing the running cost of the can body manufacturing equipment, and by laser welding the can body. mass production became possible.
吹出口８のワーク表面からの高さＨは、従来よ
りも大きいが15mm以下に設定したので、ワーク表
面付近でのアシストガスの噴出速度を適度に低下
させることができ、空気中の酸素がワーク表面に
良好に接触し、酸素不足による溶接不良をよく解
消できた。 The height H of the air outlet 8 from the workpiece surface is set to 15 mm or less, although it is larger than before, so the blowout speed of the assist gas near the workpiece surface can be appropriately reduced, and the oxygen in the air can be removed from the workpiece. It made good contact with the surface and successfully solved welding defects caused by oxygen deficiency.
更にノズル７の下端近傍でワーク送り方向Ａの
下手側に、スパツタを真空引きする吸塵管２１を
配置してあるので、缶胴表面にスパツタが付着し
たり、缶胴表面がスパツタで傷付くことも防止で
き、缶胴の品質を向上できた。 Furthermore, near the lower end of the nozzle 7 and on the downstream side in the workpiece feeding direction A, a dust suction pipe 21 for evacuating spatter is arranged to prevent spatter from adhering to or damaging the can body surface. It was also possible to prevent this and improve the quality of the can body.
第１図ないし第３図は本考案の第１実施例を示
しており、第１図はノズルと溶接対象との位置関
係を示す縦断面図（但し、想像線は従来例を示
す）、第２図は加工ヘツドの縦断側面図、第３図
はワーク押圧手段を示す第２図におけるＢ−Ｂ線
断面図である。第４図および第５図は本考案の第
２実施例を示しており、第４図は加工ヘツドの縦
断側面図、第５図は防護板の底面図である。第６
図は従来例を示す加工ヘツドの縦断側面図であ
る。
１……缶胴素材、５……集光レンズ、７……ノ
ズル、８……吹出口、１０……ワーク押圧手段、
１１……押えデイスク、Ｈ……吹出口のワーク表
面からの高さ。
1 to 3 show a first embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view showing the positional relationship between the nozzle and the welding object (however, the imaginary line shows the conventional example), and FIG. 2 is a longitudinal sectional side view of the processing head, and FIG. 3 is a sectional view taken along the line B--B in FIG. 2, showing the workpiece pressing means. 4 and 5 show a second embodiment of the present invention, FIG. 4 being a longitudinal sectional side view of the processing head, and FIG. 5 being a bottom view of the protective plate. 6th
The figure is a longitudinal sectional side view of a processing head showing a conventional example. 1... Can body material, 5... Condensing lens, 7... Nozzle, 8... Air outlet, 10... Work pressing means,
11... Presser disk, H... Height of air outlet from work surface.
Claims (1)
集束されるレーザビームの光路上にアシストガス
を吹き出すノズル７を配設し、 ノズル７を挟む対向位置に缶胴素材１を溶接姿
勢に保持する一対のワーク押圧手段１０を備えて
おり、 ノズル７の下端近傍でワーク送り方向Ａの下手
側にスパツタを真空引きする吸塵管２１を配置し
てあり、 前記ノズル７の吹出口８のワーク表面からの高
さＨを７〜15mmに設定してあることを特徴とする
缶胴製造装置。[Scope of Claim for Utility Model Registration] A nozzle 7 for blowing out assist gas on the optical path of a laser beam focused by a condensing lens 5 inside the processing head 3 is disposed, and a can is placed at an opposing position across the nozzle 7. It is equipped with a pair of workpiece pressing means 10 for holding the body material 1 in a welding position, and a dust suction pipe 21 for vacuuming spatter is arranged on the downstream side in the workpiece feeding direction A near the lower end of the nozzle 7. A can body manufacturing apparatus characterized in that the height H of the air outlet 8 from the workpiece surface is set to 7 to 15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986196300U JPH0534861Y2 (en) | 1986-12-19 | 1986-12-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986196300U JPH0534861Y2 (en) | 1986-12-19 | 1986-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63101186U JPS63101186U (en) | 1988-07-01 |
| JPH0534861Y2 true JPH0534861Y2 (en) | 1993-09-03 |
Family
ID=31154995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986196300U Expired - Lifetime JPH0534861Y2 (en) | 1986-12-19 | 1986-12-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0534861Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022075490A (en) * | 2020-11-05 | 2022-05-18 | 日本製鉄株式会社 | Laser sputter dust collection device and laser sputter dust collection method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5184652A (en) * | 1975-01-24 | 1976-07-24 | Hitachi Ltd |
-
1986
- 1986-12-19 JP JP1986196300U patent/JPH0534861Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5184652A (en) * | 1975-01-24 | 1976-07-24 | Hitachi Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63101186U (en) | 1988-07-01 |
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