JPH0631451A - Welding method in inert gaseous atmosphere - Google Patents
Welding method in inert gaseous atmosphereInfo
- Publication number
- JPH0631451A JPH0631451A JP4236292A JP23629292A JPH0631451A JP H0631451 A JPH0631451 A JP H0631451A JP 4236292 A JP4236292 A JP 4236292A JP 23629292 A JP23629292 A JP 23629292A JP H0631451 A JPH0631451 A JP H0631451A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- inert gas
- reduced
- work
- gaseous atmosphere
- 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.)
- Pending
Links
Landscapes
- Arc Welding In General (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は減圧容器の中で不活性
ガスを放出するようにした、不活性ガス雰囲気下の溶接
方法に関し、更に詳しくは減圧容器の中のワーク（被溶
接材）の要所に所定の不活性ガスを吹き付けるようにな
した、不活性ガス雰囲気下の溶接方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding method under an inert gas atmosphere for releasing an inert gas in a decompression container, and more particularly to a work (material to be welded) in the decompression container. The present invention relates to a welding method in an inert gas atmosphere, in which a predetermined inert gas is blown to important points.
【０００２】[0002]
【従来の技術】従来の不活性ガス雰囲気下の溶接におい
ては、ワークの溶接部に上から、アルゴンガス、窒素ガ
スなどの不活性ガスを吹き付けながら溶接が行なわれて
いる。この溶接のエネルギー源として、アーク、プラズ
マ、レーザー、ビーム、その他が用いられている。2. Description of the Related Art In conventional welding in an inert gas atmosphere, welding is performed while spraying an inert gas such as argon gas or nitrogen gas onto the welded portion of the work from above. Arc, plasma, laser, beam, etc. are used as the energy source for this welding.
【０００３】従来からこの種不活性ガス雰囲気下の溶接
にあっても、ワークの厚さ、形状、構造、組み合わせ、
などには制限があった。しかし通常は溶接部をフラック
スなどで覆う大雑把な溶接技術を対象にしていたので、
これらの制約された条件下の溶接でも何ら支障は無く製
品として通用していたのであるが、近頃、異種金属の溶
接、金属箔の溶接、特殊な立体構造の溶接など高度の品
質や難度の高い溶接の要求が多くなるに連れて、これら
に対応した良質の溶接が出来ない欠点があった。またレ
ーザーやビームその他、高密度のエネルギーを利用した
ものは、切断は比較的容易に実施されるのであるが、こ
のエネルギーを溶接に利用することは甚だ困難とされて
いる。Conventionally, even in welding in an inert gas atmosphere of this kind, the thickness, shape, structure, combination of workpieces,
There was a limitation. However, since we were usually targeting a rough welding technique that covers the weld with flux etc.,
Although it could be welded under these restricted conditions without any problems, it was used as a product, but recently, welding of dissimilar metals, welding of metal foil, welding of special three-dimensional structure, etc. has high quality and high difficulty. As the demand for welding has increased, there has been a drawback that high quality welding corresponding to these cannot be performed. Lasers, beams, and other materials that use high-density energy are relatively easy to cut, but it is extremely difficult to use this energy for welding.
【０００４】その主たる原因の一つは、アルゴンガスな
どの不活性ガスが、溶融したワークと大気、更にはプラ
ズマとを完全に遮断できないことである。即ち、吹き付
ける不活性ガスが小量の空気を巻き込んでくるので、ワ
ークの溶融部が厳密には完全な不活性ガス雰囲気にはな
っておらず、この微小の空気の存在が、精密を要する金
属箔などの溶接に極めて大きな支障となって該溶接部を
不完全なものとする欠点がある。One of the main causes is that the inert gas such as argon gas cannot completely shield the melted work from the atmosphere and plasma. That is, since the inert gas to be blown in entrains a small amount of air, the molten portion of the work is not in a completely inert gas atmosphere in the strict sense, and the presence of this minute air causes a metal that requires precision. There is a drawback in that the welding of foil or the like is extremely hindered and the welded portion becomes incomplete.
【０００５】またレーザー光照射によって、ワークの該
溶融表面とノズルとの間に生じるワークの成分がプラズ
マになって、レーザービームのエネルギーを吸収するば
かりでなく、該プラズマが団塊となって宙に浮遊し、ワ
ークから吹き上げる金属成分と、上から吹き付けるアル
ゴンガスの気流によってブラウン運動のような不安定な
状態で存在するために、この中を通過するレーザー光の
精緻なビームの焦点が微妙に移動し安定した溶接ができ
ない欠点がある。Further, when the laser beam is irradiated, the component of the work generated between the molten surface of the work and the nozzle becomes plasma, and not only the energy of the laser beam is absorbed, but also the plasma becomes a nodule and is suspended in the air. The metal component that floats and blows up from the work and the argon gas flow that blows from above exists in an unstable state such as Brownian motion, so the focus of the delicate beam of the laser light passing through this moves delicately However, there is a drawback that stable welding cannot be performed.
【０００６】更に、前記不活性ガスと共に巻き込まれて
吹き付けられた空気などが、高温で溶融している溶接部
に入って気泡を発生したり、溶融部でガス化した成分が
気泡となったりし易い欠点がある。Further, the air and the like which are entrained and blown together with the above-mentioned inert gas may enter the welded portion which is melted at a high temperature to generate bubbles, or the gasified components in the molten portion may become bubbles. There is an easy drawback.
【０００７】[0007]
【発明が解決しようとする課題】この発明が解決しよう
とする課題は、従来の不活性ガス雰囲気下の溶接方法の
上記欠点を解消することである。更に詳しくは多量に発
生するガスやプラズマをを従来のように大量の不活性ガ
スで吹き飛ばすのでは無く、小量の不活性ガスで安定し
た溶接ができる方法を開発せんとするものである。The problem to be solved by the present invention is to eliminate the above-mentioned drawbacks of the conventional welding method under an inert gas atmosphere. More specifically, the present invention intends to develop a method capable of performing stable welding with a small amount of inert gas, rather than blowing away a large amount of gas or plasma generated with a large amount of inert gas as in the conventional case.
【０００８】[0008]
【課題を解決するための手段】この課題は、不活性ガス
雰囲気下の溶接を、減圧された容器或は装置の中で行な
うことによって解決される。This problem is solved by carrying out welding under an inert gas atmosphere in a depressurized container or apparatus.
【０００９】[0009]
【作用及び構成】この発明の態様としては以下のものが
包含される。 （イ）溶接装置全体を、適度に減圧された容器或は装置
の中に収めた態様。 （ロ）減圧された容器或は装置の中で不活性ガスをワー
クに吹き付けた態様。 （ハ）上記態様の容器或は装置の中で、ワーク又はビー
ム或は両者が移動する態様。ACTION AND STRUCTURE The following aspects are included in the embodiments of the present invention. (A) A mode in which the entire welding device is housed in an appropriately depressurized container or device. (B) A mode in which an inert gas is blown onto the work in a depressurized container or apparatus. (C) A mode in which the work, the beam, or both move in the container or apparatus of the above mode.
【００１０】[0010]
【実施例１】実施例について図面を参照して説明する
と、図１に於いて、減圧された容器１の中に、移動テー
ブル２がある。 移動テーブル２の上にはワーク３が固
定され上方からレーザーのビーム４が、ワーク３を照射
するようになっている。このときの減圧された容器１の
中は、真空度１／２ トールから１０−３トール、好ま
しくは１／５ トールから１／１０ トールである。EXAMPLE 1 An example will be described with reference to the drawings. In FIG. 1, a moving table 2 is provided in a depressurized container 1. A work 3 is fixed on the moving table 2, and a laser beam 4 irradiates the work 3 from above. At this time, the degree of vacuum in the depressurized container 1 is ½ torr to 10 -3 torr, preferably ⅕ to 1/10 torr.
【００１１】この実施例は図２に示す、これは殆んどの
溶接方法では困難とされている立体的な溶接構造の一例
である。 ワークは、厚さ５０ミクロン、幅１００ｍｍ
の耐熱性ステンレス鋼、即ち２０Ｃｒ−５Ａｌの箔を平
板と波板とに成型したものを重ねて、多層巻回して直径
８０ｍｍ、約４００セル／ｉｎｃｈ２の円筒型ハニカム
コア体５に加工した本体６の端面開口部７に、その中央
部を横断して軸方向に巾１ｍｍ、深さ１７ｍｍのスリッ
ト状に凹陥させた中に、厚さ２ｍｍ巾１５ｍｍの板状の
結合部材８を、前記端面開口部７から上に１ｍｍ出るよ
うに嵌入する。この嵌入は強制嵌入であって結合部材８
に接触している上記箔は結合部材８の周縁に倒伏して結
合部材８に緊密に密着する。然してこの結合部材８に、
６００ＷのＣＯ２レーザーのビーム９を２００ｍｍ／分
の速度で照射する。吹き付けられる不活性ガスはアル
ゴンガスである。This embodiment is shown in FIG. 2, which is an example of a three-dimensional welded structure which is difficult with most welding methods. The workpiece has a thickness of 50 microns and a width of 100 mm.
Of heat-resistant stainless steel, that is, 20Cr-5Al foil molded into a flat plate and a corrugated plate, and laminated to form a cylindrical honeycomb core body 5 having a diameter of 80 mm and a diameter of about 400 cells / inch 2. In the end face opening 7 of 6, the plate-like coupling member 8 having a thickness of 2 mm and a width of 15 mm was formed in the end face opening 7 by recessing in a slit shape having a width of 1 mm and a depth of 17 mm across the central portion. It is fitted so that it may protrude 1 mm from the opening 7. This fitting is a forced fitting and the coupling member 8
The foil that is in contact with the plate lays down on the periphery of the joining member 8 and closely adheres to the joining member 8. However, in this connecting member 8,
A beam 9 of a 600 W CO 2 laser is applied at a speed of 200 mm / min. The inert gas blown is argon gas.
【００１２】[0012]
【実施例２】 （１）これを通常の大気中で行なった処、溶融して流れ
出した結合部材８の表面はもとより周辺の箔まで真っ黒
になるばかりでなく、そこに発生したプラズマ９がレー
ザー光のエネルギーの一部を吸収して安定した溶接には
ならなかった。これは蜂の巣構造を形成する、４００セ
ル／ｉｎｃｈ２のハニカム状コア体５の空間の中に有る
大量の空気が、上から吹き付けてくるアルゴンガスに吹
き戻されてアルゴンガス中に多量に混入し、完全な不活
性ガスの雰囲気が形成できないからである。Second Embodiment (1) When this is performed in a normal atmosphere, not only the surface of the joining member 8 that melts and flows out, but also the surrounding foil becomes black, and the plasma 9 generated there is laser. It did not result in stable welding by absorbing part of the light energy. This is because a large amount of air in the space of the honeycomb-shaped core body 5 of 400 cells / inch 2 that forms the honeycomb structure is blown back to the argon gas blown from above and mixed in a large amount in the argon gas. This is because a complete inert gas atmosphere cannot be formed.
【００１３】[0013]
【実施例３】 （２）次いで、これ全体を１／１０ トールに減圧され
た容器或は装置の中に入れて上記（１）と同様の処理を
なしたところ、上記結合部材８の溶融表面もその周辺も
白く金属光沢があり、その箔との溶着は安定したもので
あった。Third Embodiment (2) Then, the whole is put in a container or apparatus depressurized to 1/10 Torr and the same treatment as in (1) above is performed. Also, the periphery of the foil was white and had metallic luster, and the welding to the foil was stable.
【００１４】[0014]
【発明の効果】以上詳述したように、本発明によれば、
以下に列挙するような種々の効果が得られる。 （１）不活性ガスを利用した溶接には、電子ビーム溶接
のような高価且つ高度の真空装置を必要とせず、大気中
で連続して大量の溶接が出来る長所があるが、この発明
は前記長所をそのまま活かした溶接ができる。 （２）不活性ガスの使用量が少なくて済み、ランニング
コストが下がる。 （３）レーザー光のビームのエネルギーがプラズマに吸
収されて減衰することが少なくなり、エネルギー効率の
良い溶接ができる。 （４）溶融部から発生するガスが真空ポンブに吸引さ
れ、溶接部分に生じ易かった気泡が減少して溶接部の欠
陥が減少する。 （５）従って高炭素系などガスを発生しやすいワークの
ときでも良好な溶接ができる。 （６）比較的低真空でも良いので装置が大型になっても
設備費が少なくて済む。 （７）ワークがバッチ式だけでなく、外から連続式に搬
入する事が出来るのでコストが下がる。 （８）多点で同時に溶接しても均一な溶接ができる・As described in detail above, according to the present invention,
Various effects as listed below can be obtained. (1) Welding using an inert gas does not require expensive and sophisticated vacuum equipment such as electron beam welding, and has an advantage that a large amount of welding can be continuously performed in the atmosphere. Welding is possible with the advantages as it is. (2) The amount of inert gas used is small, and the running cost is reduced. (3) The energy of the beam of the laser light is less absorbed and attenuated by the plasma, and welding with high energy efficiency can be performed. (4) The gas generated from the melted portion is sucked into the vacuum pump, and the bubbles that are easily generated in the welded portion are reduced to reduce defects in the welded portion. (5) Therefore, good welding can be performed even in the case of a work such as a high carbon system that easily generates gas. (6) Since a relatively low vacuum is sufficient, the equipment cost can be small even if the apparatus becomes large. (7) Since the work can be carried in not only in the batch system but also in the continuous system from the outside, the cost is reduced. (8) Uniform welding is possible even if welding at multiple points at the same time.
【００１５】尚、実施例ではＣＯ２レーザー溶接につい
て説明したが、当然これに限定するものではない、ま
た、不活性ガスもアルゴンガスについて述べたが勿論こ
れに限定しない。更に減圧された容器或は装置も何でも
よいことは言うまでもない。レーザー光のビームの照射
方向も実施例に限定しない。用途も実施例に限定せず広
く適用できることはいうまでもない。Although CO 2 laser welding has been described in the embodiment, naturally it is not limited to this, and argon gas is also mentioned as the inert gas, but of course it is not limited to this. It goes without saying that any depressurized container or device may be used. The irradiation direction of the laser beam is not limited to the example. Needless to say, the application is not limited to the examples and can be widely applied.
【図１】図１はこの発明の実施例の模型を示す断面図で
ある。FIG. 1 is a sectional view showing a model of an embodiment of the present invention.
【図２】図２はハニカムコア体にＣＯ２レーザー光のビ
ーム照射の状態を示す説明図である。FIG. 2 is an explanatory diagram showing a state of beam irradiation of a CO 2 laser beam on a honeycomb core body.
１． 減圧された容器或は装置 ２． 移動テーブル ３． ワーク ４． レーザー光のビーム ５． ハニカムコア体 ６． 本体 ７． 端面開口部 ８． 結合部材 ９． レーザー光のビーム １０． プラズマ 1. Depressurized container or device 1. Moving table 3. Work 4. Beam of laser light 5. Honeycomb core body 6. Main body 7. End face opening 8. Coupling member 9. Beam of laser light 10. plasma
Claims (3)
に於いて、減圧された容器或は装置の中で、溶接がなさ
れることを特微とする不活性ガス雰囲気下の溶接方法。1. A method of welding in an inert gas atmosphere, characterized in that the welding is performed in a depressurized container or apparatus in welding performed in an inert gas atmosphere.
クが移動するようになした請求項１に記載の不活性ガス
雰囲気下の溶接方法2. The welding method in an inert gas atmosphere according to claim 1, wherein the work is moved in the depressurized container or apparatus.
ノズル或はビームが移動うするようになした請求項１に
記載の不活性ガス雰囲気下の溶接方法。3. The welding method under an inert gas atmosphere according to claim 1, wherein a welding nozzle or a beam moves in the depressurized container or apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4236292A JPH0631451A (en) | 1992-07-20 | 1992-07-20 | Welding method in inert gaseous atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4236292A JPH0631451A (en) | 1992-07-20 | 1992-07-20 | Welding method in inert gaseous atmosphere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0631451A true JPH0631451A (en) | 1994-02-08 |
Family
ID=16998634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4236292A Pending JPH0631451A (en) | 1992-07-20 | 1992-07-20 | Welding method in inert gaseous atmosphere |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631451A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642085A (en) * | 2012-04-01 | 2012-08-22 | 上海交通大学 | Plasma-side-suction negative pressure device for laser welding |
| JP2023126128A (en) * | 2022-02-28 | 2023-09-07 | 哈爾濱工業大学 | High-quality vacuum laser welding method and system for thick heterogeneous material |
| JP2023143681A (en) * | 2022-03-25 | 2023-10-06 | 哈爾濱工業大学 | Vacuum swing laser welding method and system for plates with different thicknesses |
-
1992
- 1992-07-20 JP JP4236292A patent/JPH0631451A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642085A (en) * | 2012-04-01 | 2012-08-22 | 上海交通大学 | Plasma-side-suction negative pressure device for laser welding |
| JP2023126128A (en) * | 2022-02-28 | 2023-09-07 | 哈爾濱工業大学 | High-quality vacuum laser welding method and system for thick heterogeneous material |
| JP2023143681A (en) * | 2022-03-25 | 2023-10-06 | 哈爾濱工業大学 | Vacuum swing laser welding method and system for plates with different thicknesses |
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