JPS60130462A - Brazing method of thin metallic sheet - Google Patents

Abstract

PURPOSE:To seal and join easily and thoroughly a pair of thin metallic sheets having the circumferential edge parts formed into an approximately L shape with less train by butting the sheets to each other and installing a bar-shaped brazing material along the top edge part of the butt surfaces then heating the brazing material to melt. CONSTITUTION:This metallic sheets 14, 15 of which the circumferential edge parts are bent or drawn to an L shape are tightly fitted and butted to each other and a wire- or bar-shaped brazing material 17 is installed along the top edge 16 of the butt surfaces. A laser beam spot 18 irradiated from above is scanned in the direction (d) along the material 17 to heat the material 17 to melt, thereby allowing the molten brazing material to flow into a clearance 19 and joining securely the sheets 14, 15. The plural thin metallic sheet parts are thus easily and thoroughly seal bonded with less strain.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、複数の金属薄板部品を接合して構成する真空
容器や一般の装置類の製作にあたり、歪２べ一２ｊ の発生が少々く、接合部の真空封着が完全に可能な金属
薄板の接合方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is useful for manufacturing vacuum containers and general equipment constructed by joining a plurality of metal thin plate parts, with the aim of reducing the occurrence of strain 2b and 2j. The present invention relates to a method for joining thin metal plates that allows complete vacuum sealing of parts.

従来例の構成とその問題点 従来から、いくつかの構成部品を接合する場合ネジ止め
できないものや、スペースに余裕のないものに関しては
、溶接により接合し、製品化してきている。しかし、現
在製品の小型軽量化のため構成部品も小型薄型になって
来ており、従来の溶接方法では真空封着まで考慮すると
満足できる接合の結果が得られていない。Conventional configurations and their problems Traditionally, when several component parts cannot be joined with screws or where there is not enough space, they have been joined by welding and commercialized. However, in order to make products smaller and lighter, component parts are also becoming smaller and thinner, and conventional welding methods are unable to provide satisfactory joining results when vacuum sealing is taken into consideration.

以下に従来の接合方法について第１図〜第３図を用いて
詳細に説明する。各図において同一部材には同一番号を
付している。The conventional joining method will be explained in detail below using FIGS. 1 to 3. In each figure, the same members are given the same numbers.

まず、第１の方法として、第１図のように、レーザービ
ーム１を焦光レンズ２にて絞り込み、エネルギーを集中
させたレーザービームスポット３を、端面を密着して置
かれた金属板材４，６の接合部６にそって、矢印ａ方向
に走査させて突き合わせ溶接を行なう。First, as shown in FIG. 1, a laser beam 1 is narrowed down by a focusing lens 2, and a laser beam spot 3 with concentrated energy is focused on a metal plate 4 placed with its end face in close contact with the laser beam spot 3. Butt welding is performed by scanning along the joint portion 6 of No. 6 in the direction of arrow a.

しかしながら金属板材４，６が非常に薄い場合、３ベ−
ミ′ 例えば０．２ｍｍ　前後では、レーザービーム１の出力
条件やデフォーカスなどが、少しでも変化すると、溶は
込め深さが足りなかったり、穴があいたりし、溶接条件
の選定が難かしく、捷だ、矢印ａ方向へ走査するに従っ
て、加工時の熱蓄積によって金属板材が熱変形をおこし
、接合部６に食い違いが発生するため、さらに溶接が困
難になるという欠点を有していた。However, if the metal plates 4 and 6 are very thin, the 3 base
For example, at around 0.2 mm, if the output conditions or defocus of laser beam 1 change even slightly, the welding depth may be insufficient or holes may form, making it difficult to select welding conditions. However, as the welding is scanned in the direction of the arrow a, the metal plate material is thermally deformed due to heat accumulation during machining, causing discrepancies in the joints 6, which makes welding even more difficult.

また第２の方法として、第２図のように、金属板材７，
８を一部重ね合わせた部分にレーザービームスポット９
を照射し、矢印す方向へ走査させて重ね合わせ溶接を行
なう場合も、第１の方法と同ように、薄板の場合は、溶
接条件の選定が難かしくまた熱変形により重ね合わせ部
にすきまが発生し溶接が困難であった。In addition, as a second method, as shown in FIG.
Laser beam spot 9 is placed on the part where 8 is partially overlapped.
When overlapping welding is performed by irradiating and scanning in the direction of the arrow, as with the first method, it is difficult to select the welding conditions for thin plates, and gaps may form in the overlapping part due to thermal deformation. This made welding difficult.

また第３の方法として、第３図のように、周縁部をおり
曲げあるいは絞り加工によりＬ字型にした金属薄板１０
．１１を互いに衝合させ、その衝合面上縁部１２上をレ
ーザービームスポット１３を照射し、矢印Ｃ方向に走査
させ、フランジ溶接を行なう場合、発生した熱が横には
広がらず、深さ方向に伝播し、第１及び第２の方法と比
べ良い溶接結果が得られるが、衝合面上を確実に照射す
るように位置制御することは難かしくビーム半径以上ず
れると未溶接部分ができ、特に真空容器などのように厳
密な溶接が必要な場合には、溶接は困難であるという欠
点を有していた。In addition, as a third method, as shown in FIG.
．． 11 are abutted against each other, and the laser beam spot 13 is irradiated onto the upper edge 12 of the abutting surfaces and scanned in the direction of arrow C to perform flange welding, the generated heat does not spread laterally and is The beam propagates in the direction, and better welding results can be obtained compared to the first and second methods, but it is difficult to control the position to ensure that the beam irradiates on the abutting surface, and if the beam deviates by more than the beam radius, unwelded areas may occur. However, it has the disadvantage that welding is difficult, especially in cases where strict welding is required, such as in vacuum vessels.

発明の目的 本発明は複数の金属薄板部品を、簡単にかつ歪を少なく
完全封着接合できる金属薄板のろう接方法を提供するも
のである。OBJECTS OF THE INVENTION The present invention provides a method for soldering thin metal plates, which allows a plurality of thin metal plate parts to be easily and perfectly sealed and joined with less distortion.

発明の構成 本発明は、一対の周縁部の一部又は全部を略り字形にし
た金属薄板を互いに衝合し、前記衝合面の上縁部にそっ
て、ワイヤ状又は棒状のろう材を設置した後、前記ろう
材を加熱溶融させ接合する構成となっており、これによ
り、強固に接合させることができる。Structure of the Invention The present invention provides for a pair of thin metal plates having part or all of their peripheral edges shaped like an abbreviation to be brought into contact with each other, and a wire-shaped or rod-shaped brazing material to be placed along the upper edge of said abutting surfaces. After installation, the brazing material is heated and melted to join, thereby making it possible to firmly join.

実施例の説明 まず、第４図に示すように周縁部をＬ字型にお６ベージ り曲げ加工又は絞り加工した金属薄板１４．１５を互い
に密着衝合し、前記衝合面の上縁部１６にそってワイヤ
状もしくは棒状のろう世７を設置し、その上からレーザ
ービームスポット１８を、照射しながらろう材１７にそ
って矢印ｄ方向に走査し、ろう材１７を加熱溶融させ、
金属薄板１４．１５を接合する。この場合ろう材１７が
衝合面間のすき１．１９にも毛細管現象で流れ込み、強
固に接合することができる。DESCRIPTION OF THE EMBODIMENTS First, as shown in FIG. 4, thin metal plates 14 and 15 whose peripheral edges have been bent or drawn into an L-shape are closely abutted against each other, and the upper edge of the abutment surface is A wire-shaped or rod-shaped soldering material 7 is installed along the soldering material 16, and a laser beam spot 18 is irradiated from above while scanning along the soldering material 17 in the direction of arrow d to heat and melt the soldering material 17.
Join the metal sheets 14.15. In this case, the brazing filler metal 17 flows into the gap 1.19 between the abutting surfaces by capillary action, making it possible to firmly join them.

第６図は上記ろう接方法を真空容器に用いた場合を示す
図で、第６図のように、容器下部分２゜と周縁部を絞り
によりＬ字型にしたふた部分２１とを衝合させ、衝合面
上縁部にそってろう材２２を配置し、レーザービームス
ポット２３で加熱溶融し封着する。その後吸引口２４よ
り内部を真空引きし、吸引口２４を封着することにより
、金属薄板たとえば０．２胴程度のステンレス鋼板など
の材料を用いて真空容器の製作を容易に行表うことかで
きる。またろう材をさらに安定して設置するため、金属
薄板の周縁部の加工を第６図（Ａ）のよ６ベージ うにおり曲げ角度θを鋭角的にし、ろう材　２６をはさ
るいは段付部２７；のｅ１直をおこなうことにより、ろ
う材２８．２９の固定を確実にする。FIG. 6 is a diagram showing the case where the above brazing method is applied to a vacuum container. As shown in FIG. Then, a brazing material 22 is placed along the upper edge of the abutting surface, and is heated and melted by a laser beam spot 23 to seal it. After that, by evacuating the inside through the suction port 24 and sealing the suction port 24, it is possible to easily manufacture a vacuum container using a material such as a thin metal plate, for example, a stainless steel plate of about 0.2 mm. can. In addition, in order to install the brazing filler metal more stably, the peripheral edge of the thin metal plate is processed in a 6-bevel manner as shown in Fig. 6 (A), and the bending angle θ is made acute. The fixation of the brazing filler metals 28 and 29 is ensured by carrying out the e1 straightening of the part 27;.

またレーザービームスポット１８の走査方法として、接
合面上縁部にそって走査することを基本とするが、充分
にろう材および金属薄板を加熱できない場合は、第７図
のように、レーザービームスポット１８の移動を軌跡が
折れ線３Ｑのように進行方向に対して左右に振らしなが
ら加熱溶融しろう接を行なうとより強固で完全な封着を
実現できる。The scanning method of the laser beam spot 18 is basically to scan along the upper edge of the joint surface, but if the brazing filler metal and thin metal plate cannot be heated sufficiently, the laser beam spot 18 can be scanned as shown in Fig. 7. A stronger and more complete seal can be achieved by heating and melting and brazing the parts 18 while swinging the movement left and right with respect to the direction of travel as shown by the polygonal line 3Q.

発明の効果 以上のように本発明の金属薄板のろう接方法によれば以
下の効果を有する。まず、薄板を簡単に接合でき、真空
的にも完全に封着が可能であり、強度的にも強固な接合
が可能である。また歪の発生が少なくろう接待のレーザ
ー加工条件範囲を広くとることができ、さらに薄板母材
を変質させる７ページ ことかなく、クラック発生もない。Effects of the Invention As described above, the method for brazing thin metal plates of the present invention has the following effects. First, thin plates can be easily joined, they can be completely sealed in a vacuum, and they can be joined with strong strength. In addition, there is less distortion, allowing a wider range of laser processing conditions for soldering, and furthermore, there is no deterioration of the thin plate base material, and no cracks occur.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来の突き合わせ溶接を示す斜視図、第２図
は、同重ねあわせ溶接を示す斜視図、第３図は同フラン
ジ溶接を示す斜視図、第４図は本発明の一実施例の金属
薄板のろう接方法を示す斜視図、第６図は、同他の実施
例における真空容器の接合を示す断面図、第６図は同薄
板の加工形状を示す断面図、第７図は同レーザービーム
スポットの第２の走査方法を示す図である。 １４．１５・・・・・・金属薄板、１６・・・・・・衝
合面の上面部、１７・・・・・・ろう材、１日・・・・
・・レーザービームスポット。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名菓　
１　図 第　２　面 第３図　Ｃ 第　４　図 第６泡 第７図FIG. 1 is a perspective view showing conventional butt welding, FIG. 2 is a perspective view showing overlap welding, FIG. 3 is a perspective view showing flange welding, and FIG. 4 is an embodiment of the present invention. FIG. 6 is a sectional view showing the joining of a vacuum container in another embodiment, FIG. 6 is a sectional view showing the processed shape of the same thin plate, and FIG. It is a figure which shows the 2nd scanning method of the same laser beam spot. 14.15...Thin metal plate, 16...Top part of abutting surface, 17...Brazing metal, 1st...
...Laser beam spot. Name of agent: Patent attorney Toshio Nakao and one other name
1 Figure 2 Side Figure 3 C Figure 4 Figure 6 Bubble Figure 7

Claims (1)

【特許請求の範囲】[Claims] （１）一対の周縁部の一部又は全部を略り字形にした金
属薄板を互いに衝合し、前記衝合面の上縁部にそって、
ワイヤ状又は棒状のろう埜を設置した後、前記ろう材を
加熱溶融させ接合することを特徴とする金属薄板のろう
接方法。 （躊　ろう村上をレーザービームを照射することによυ
加熱溶融させ接合することを特徴とする特許請求の範囲
第１項記載の金属薄板のろう接方法０（碕　ろう材上を
レーザービームを左右に振らせながら走査させることに
より加熱溶融させ接合することを特徴とする特許請求の
範囲第１項記載の金属薄板のろう接方法０(1) A pair of thin metal plates with part or all of their peripheral edges shaped into an abbreviated shape are abutted against each other, and along the upper edge of the abutting surfaces,
A method for brazing thin metal plates, which comprises: installing a wire-shaped or rod-shaped brazing filler metal, and then heating and melting the brazing filler metal to join them. (By irradiating the hesitant Murakami with a laser beam,
Method 0 for welding thin metal plates according to claim 1, characterized in that the welding is performed by heating and melting and joining by heating and melting by scanning a laser beam while swinging it from side to side over the brazing material. A method 0 for brazing thin metal plates according to claim 1, characterized in that: