JPS6321593B2 - - Google Patents
Info
- Publication number
- JPS6321593B2 JPS6321593B2 JP56037561A JP3756181A JPS6321593B2 JP S6321593 B2 JPS6321593 B2 JP S6321593B2 JP 56037561 A JP56037561 A JP 56037561A JP 3756181 A JP3756181 A JP 3756181A JP S6321593 B2 JPS6321593 B2 JP S6321593B2
- Authority
- JP
- Japan
- Prior art keywords
- shield cover
- electron beam
- welding
- workpiece
- tip
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Description
【発明の詳細な説明】
この発明は電子ビームによる溶接等の加工を行
う電子ビーム溶接機に関し、特に溶接室に於ける
電子ビームの曲り防止用シールドカバーに係わる
ものである。近年電子ビーム溶接法はその深溶け
込みの利点により、薄板から20mm〜30mm程度の厚
板の溶接に使用されていることは周知の通りであ
る。特に大型構造物への適用等も徐々に拡大され
ている。然るにこれらの大型構造物の溶接の際に
はその溶接長が１ｍ以上と長い場合が一般的であ
る。然して電子ビームはわずかな磁界即ち10ガウ
ス以上の磁界ではその進路を曲げられてしまう。
また永久磁界が10ガウス以下と十分低い場合でも
ワークを固定するための治具の形状あるいはワー
クを走行させるための移動角車の形状の影響を受
け同様にその進路を曲げられてしまう。本発明で
はこれらの点に鑑みてなされたもので初透磁率の
高い材質を使用した伸縮自在な磁気シールドカバ
ーを提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electron beam welding machine that performs processing such as welding using an electron beam, and more particularly to a shield cover for preventing bending of an electron beam in a welding chamber. It is well known that in recent years, electron beam welding has been used for welding thin plates to thick plates of about 20 mm to 30 mm due to its deep penetration advantage. In particular, its application to large structures is gradually expanding. However, when welding these large structures, the weld length is generally as long as 1 m or more. However, the electron beam's path is bent by a small magnetic field, that is, a magnetic field of 10 Gauss or more.
Furthermore, even when the permanent magnetic field is sufficiently low, such as 10 Gauss or less, the course of the workpiece is similarly bent due to the influence of the shape of the jig for fixing the workpiece or the shape of the moving square wheel for moving the workpiece. The present invention has been made in view of these points, and provides a stretchable magnetic shield cover using a material with high initial magnetic permeability.
次に図面を使用して本発明の詳細な説明を行
う。 Next, the present invention will be described in detail using the drawings.
第１図は本発明になる電子ビーム溶接機の溶接
室及び電子ビーム発生装置を図式に表わした断面
図である。第１図に於て１はワーク２を収納する
溶接室で図に於ては左右方向をカツトして示して
ある。また該溶接室１にはワーク２を走行させる
ための移動台車３がとりつけられている。４は電
子ビーム発生装置であり電子ビームは該電子ビー
ム発生装置４により発生され矢印Ｘ−X0の方向
に照射される。５−1，５−2，５−3…５−oはシ
ールドカバーである。これらは互に隣り合つたシ
ールドカバーは図に示される如く先端５−1のシ
ールドカバーの伸縮動作に応じて移動できる即ち
伸縮自在な構造を有している。該シールドカバー
はおのおのその断面形状は円形であり先端になる
ほど小さくなつている。先端シールドカバー５−
１の部分の径は最小80mm程度であり、且つ先端の
開口部の径は最小40mmとなつている。また該シー
ルドカバー５−1には連結アーム６が、取付けら
れており、更に該連結アーム６は前記シールドカ
バー５を伸縮させるための駆動用の軸７とも連結
されている。該軸７は前記溶接室１を突き抜ける
ように取付けられており該溶接室１部ではシール
材８で気密を保持される。９は前記軸７の軸受で
ある。前記軸７の上端７には該軸７を上下方向に
昇降させるための駆動源例えばラツクピニオン軸
（図示せず）と結ばれている。該軸７を昇降させ
ることにより前記シールドカバー５−1，５−2…
５−oも伸縮する。該シールドカバー５は初透磁
率の高い材質例えばパーマロイなどを使用してい
る。溶接時には前記軸７を降下させることにより
シールドカバー５を伸ばしワーク２との間の距離
ｄを約50mmに設定する。このことにより電子ビー
ムの通路であるＸ−X0には外部からの磁界が影
響を及ぼすことはなくなり電子ビームは常に真直
ぐに照射される。このシールドカバーの効果は電
子ビーム発生装置４からワーク２までの距離が１
ｍ以上と長くなると顕著になる発明者らの実験に
於ては該シールドカバーを取付けない状態では２
〜５mmの範囲で電子ビームの磁界による曲りが生
じていたが該シールドカバーの板厚を３mmの厚さ
としたものを設けることにより、その電子ビーム
の曲りは目視では判別不能な範囲即ち0.2mm以下
に押えることができた。このように本発明になる
シールドカバーを使用することにより磁気の影響
を無視できることになり、溶接室内の構造あるい
は溶接室の脱磁作業を比較的粗く行うだけでよい
ことまた、溶接の際の目外れを防止できるなどそ
の実用的効果は大なるものである。 FIG. 1 is a sectional view schematically showing a welding chamber and an electron beam generator of an electron beam welding machine according to the present invention. In FIG. 1, reference numeral 1 denotes a welding chamber in which a workpiece 2 is housed, and is shown cut away in the left and right direction in the figure. Further, a movable cart 3 for moving a workpiece 2 is attached to the welding chamber 1. 4 is an electron beam generator, and an electron beam is generated by the electron beam generator 4 and irradiated in the direction of arrow X- X0 . 5-1 , 5-2 , 5-3 ...5- o is a shield cover. These shield covers adjacent to each other have a structure that allows them to move in response to the expansion and contraction of the shield cover at the tip 5-1 , that is, to be able to expand and contract as shown in the figure. Each of the shield covers has a circular cross-sectional shape and becomes smaller toward the tip. Tip shield cover 5-
The diameter of part 1 is at least about 80 mm, and the diameter of the opening at the tip is at least 40 mm. Further, a connecting arm 6 is attached to the shield cover 5-1 , and the connecting arm 6 is also connected to a drive shaft 7 for extending and contracting the shield cover 5. The shaft 7 is attached so as to pass through the welding chamber 1, and a portion of the welding chamber 1 is kept airtight by a sealing material 8. 9 is a bearing for the shaft 7. The upper end 7 of the shaft 7 is connected to a drive source, such as a rack and pinion shaft (not shown), for raising and lowering the shaft 7 in the vertical direction. By raising and lowering the shaft 7, the shield covers 5-1 , 5-2 ...
5- o also expands and contracts. The shield cover 5 is made of a material with high initial magnetic permeability, such as permalloy. During welding, the shield cover 5 is extended by lowering the shaft 7, and the distance d between it and the workpiece 2 is set to about 50 mm. As a result, the electron beam path X-X 0 is not influenced by an external magnetic field, and the electron beam is always irradiated straight. The effect of this shield cover is that the distance from the electron beam generator 4 to the workpiece 2 is 1
In the experiments conducted by the inventors, it became more noticeable when the shield cover was longer than 2 m.
Although bending due to the magnetic field of the electron beam occurred in the range of ~5 mm, by providing the shield cover with a thickness of 3 mm, the bending of the electron beam can be reduced to a range that cannot be determined visually, that is, 0.2 mm or less. I was able to hold it down. As described above, by using the shield cover of the present invention, the influence of magnetism can be ignored, and it is only necessary to perform relatively rough demagnetization work on the structure inside the welding chamber or the welding chamber. Its practical effects are great, such as being able to prevent it from coming off.
第１図は本発明になる電子ビーム溶接機の溶接
室及び電子ビーム発生装置を図式に表わした断面
図である。
１……溶接室、２……ワーク、３……移動台
車、４……電子ビーム発生装置、４，５……シー
ルカバー、６……連結アーム、７……軸、８……
シール材、９……軸受。
FIG. 1 is a sectional view schematically showing a welding chamber and an electron beam generator of an electron beam welding machine according to the present invention. 1... Welding room, 2... Workpiece, 3... Moving trolley, 4... Electron beam generator, 4, 5... Seal cover, 6... Connection arm, 7... Axis, 8...
Seal material, 9...Bearing.
Claims (1)
おのが断面形状を円形としワークに近ずくにつれ
て該円形の直径が小さくなつているシールドカバ
ーを設け、該シールドカバーは先端のシールドカ
バーの伸縮動作に応じて互に伸縮動作を行える即
ち伸縮自在な構造を有していること、該先端のシ
ールドカバーを伸縮させる手段としての駆動用の
軸を溶接室を突き抜けるように取付けて且つシー
ル材により気密保持をすると共に軸受により保持
して設けており、溶接時には前記シールドカバー
をワークと溶接面より50mm程度に接近させて溶接
を行わしめることを特徴とする電子ビーム溶接
機。1. A shield cover is provided between the electron beam generator and the workpiece, each of which has a circular cross-sectional shape and whose circular diameter decreases as it approaches the workpiece, and the shield cover expands and contracts in response to the expansion and contraction of the shield cover at the tip. In other words, the shield cover at the tip must have a telescopic structure that allows the shield cover to expand and contract, and the driving shaft as a means for expanding and contracting the shield cover at the tip is installed so as to penetrate through the welding chamber, and the sealing material is used to maintain airtightness. The electron beam welding machine is characterized in that the shield cover is held close to the workpiece by about 50 mm from the welding surface during welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56037561A JPS57152385A (en) | 1981-03-16 | 1981-03-16 | Electron beam welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56037561A JPS57152385A (en) | 1981-03-16 | 1981-03-16 | Electron beam welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57152385A JPS57152385A (en) | 1982-09-20 |
| JPS6321593B2 true JPS6321593B2 (en) | 1988-05-07 |
Family
ID=12500922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56037561A Granted JPS57152385A (en) | 1981-03-16 | 1981-03-16 | Electron beam welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57152385A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10135119B4 (en) * | 2001-07-19 | 2005-02-03 | Steigerwald Strahltechnik Gmbh | Trackable nozzle for an electron beam welding device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5145915U (en) * | 1974-10-04 | 1976-04-05 | ||
| JPS55126390A (en) * | 1979-03-23 | 1980-09-30 | Hitachi Ltd | Electron gun for electron beam processing machine |
-
1981
- 1981-03-16 JP JP56037561A patent/JPS57152385A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57152385A (en) | 1982-09-20 |
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