JPS61255774A - Electron beam welding method - Google Patents
Electron beam welding methodInfo
- Publication number
- JPS61255774A JPS61255774A JP9801185A JP9801185A JPS61255774A JP S61255774 A JPS61255774 A JP S61255774A JP 9801185 A JP9801185 A JP 9801185A JP 9801185 A JP9801185 A JP 9801185A JP S61255774 A JPS61255774 A JP S61255774A
- Authority
- JP
- Japan
- Prior art keywords
- electron beam
- welding
- pole
- magnetic
- control device
- 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
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は高電力密度の電子ビーム溶接法に関する。電子
ビーム溶接法は、他の溶接法に比べて熱源の径が小さく
、電力密度が格段に高いため、厚板を１パスで溶接でき
能率性の高い溶接法である。しかし能率性を高めるため
溶接速度を高めると、被溶接物表面近傍においてアンダ
カット並びにハンピングビードが、また溶接金属内では
縦割れ等の欠陥が発生し、高速化の障害となっている。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to high power density electron beam welding. Electron beam welding has a smaller diameter heat source and much higher power density than other welding methods, so it is a highly efficient welding method that can weld thick plates in one pass. However, when the welding speed is increased to improve efficiency, undercuts and humping beads occur near the surface of the workpiece, and defects such as vertical cracks occur within the weld metal, which are obstacles to increasing the speed.
従来技術
従来、前記の障害を克服する方法として、タンデム電子
ビーム溶接法が知られている。この方法は電子ビーム孔
内から排出された溶融金属を被溶接物表面において周辺
流を形成させて、母材を幅広く二次溶融させる方法であ
るが、この方法では電子銃ならびに電源が２台必要とな
り、装置が非常に高価となる問題点がある。Prior Art Tandem electron beam welding is known as a method for overcoming the above-mentioned obstacles. In this method, the molten metal discharged from the electron beam hole forms a peripheral flow on the surface of the workpiece, and the base metal is secondary melted over a wide area, but this method requires two electron guns and power supplies. Therefore, there is a problem that the device is very expensive.
発明の目的
本発明の目的は従来法の問題点をなくシ、低コストで可
能な電子ビーム形状制御により、被溶接物表面での周辺
流を活発化し、アンダカット、ハンピングビード並びζ
こ縦割れ等の欠陥を防止し、溶接の能率向上を図ること
ができるビーム溶接法を提供するにある。Purpose of the Invention The purpose of the present invention is to eliminate the problems of conventional methods, to activate the peripheral flow on the surface of the workpiece by controlling the electron beam shape at low cost, and to eliminate undercuts, humping beads, etc.
It is an object of the present invention to provide a beam welding method that can prevent defects such as vertical cracks and improve welding efficiency.
発明の構成
本発明は収束レンズを通過し収束途上にある電子ビーム
を、２極以上の遇数個の磁極または電極で発生した磁界
または電界内に通過せしめ、電子ビーム軸と垂直平面に
おける電子ビームの形状を溶込み方向全面に亘って、溶
接方向に長軸を有する楕円またはこれに類似する形状に
強制的に変形させた電子ビームを用いて溶接する方法に
よって解決し得た。Structure of the Invention The present invention allows an electron beam that is in the process of converging after passing through a converging lens to pass through a magnetic field or an electric field generated by an even number of magnetic poles or electrodes of two or more poles, so that the electron beam is focused in a plane perpendicular to the electron beam axis. This could be solved by a method of welding using an electron beam that is forcibly deformed into an ellipse or a similar shape over the entire surface of the welding direction in the welding direction.
これを図面に基いて説明すると、第１図は電子ビーム形
状制御方法の概要図、第２図は電子ビーム形状制御装置
の一実施概略図、第３図は電子ビーム形状制御による溶
接方法の実施態様図を示す。To explain this based on drawings, Figure 1 is a schematic diagram of an electron beam shape control method, Figure 2 is a schematic diagram of an implementation of an electron beam shape control device, and Figure 3 is an implementation of a welding method using electron beam shape control. An embodiment diagram is shown.
第１図に示すように、収束レンズ２の下に２極以上の磁
極または電極で構成された電子ビーム形状制御装置３を
設置する。これを用いて電子ビーム１の電子ビーム軸と
垂直平面における形状を制御し、その制御された形状の
電子ビームを用いて溶接する。４は電子ビーム形状制御
装置を用いない場合の焦点位置を示す。As shown in FIG. 1, an electron beam shape control device 3 composed of two or more magnetic poles or electrodes is installed below the converging lens 2. This is used to control the shape of the electron beam 1 in a plane perpendicular to the electron beam axis, and welding is performed using the controlled shape of the electron beam. 4 shows the focal position when the electron beam shape control device is not used.
次に、電子ビーム形状制御装置３の一実施態様を第２図
に示す。図は４個のコイル励磁形磁極から構成された電
子ビーム形状制御装置である。この場合、電子ビームを
成形する磁界は、４つの励磁コイル３ ａ’、３ ｂ’
、３ ｃ’、３ ｄ’で励磁される４つの磁極３ａ、３
ｂ、３ｃ、３ｄにより発生する。互いに相対峙する磁極
３ａと３Ｃ３ｂと３ｄは、それぞれ同極で同一の磁位を
有する。Next, one embodiment of the electron beam shape control device 3 is shown in FIG. The figure shows an electron beam shape control device composed of four coil-excited magnetic poles. In this case, the magnetic field that shapes the electron beam is generated by the four excitation coils 3 a', 3 b'
, 3 c', 3 d' four magnetic poles 3a, 3
It is generated by b, 3c, and 3d. The magnetic poles 3a, 3C, and 3d facing each other are the same poles and have the same magnetic potential.
磁極３ａと３０をＮ極、磁極３ｂと３ｄをＳ極とすると
、電子ビーム形状制御装置３内で、電子ビーム１には図
に示したＸ軸方向に発散、Ｙ軸方向に収束する力が働く
。いま収束レンズ２に流れる電流を適切な値に設定し、
かつ電子ビーム形状制御装置３の各励磁コイル３ ａ’
、３ ｂ’、３ｃ’、３ｄ’に流れる電流を適切な値
に設定すれば、第３図に示すように、電子ビームｌａ、
ｌｂ。When the magnetic poles 3a and 30 are N poles and the magnetic poles 3b and 3d are S poles, within the electron beam shape control device 3, the electron beam 1 has a force that diverges in the X-axis direction and converges in the Y-axis direction as shown in the figure. work. Now set the current flowing through the converging lens 2 to an appropriate value,
and each excitation coil 3 a' of the electron beam shape control device 3
, 3b', 3c', and 3d' are set to appropriate values, the electron beam la,
lb.
１ｃが電子ビーム孔６内において常に溶接線方向に長袖
を有する楕円形状となる。1c always has an elliptical shape with a long sleeve in the welding line direction within the electron beam hole 6.
このような形状の電子ビーム１ａｔｌｂ）ｌｃ番ごて溶
接を行えば被溶接物表面で溶融金属の周辺流が促進され
、高溶接速度で発生するアンダゼ
カット、ハンピングビード並に縦割れ等の諸欠４陥を防
止することができる。Electron beam welding with a #1atlb)LC iron with such a shape promotes the peripheral flow of molten metal on the surface of the workpiece, and eliminates various defects such as underaze cuts, humping beads, and vertical cracks that occur at high welding speeds. 4 failures can be prevented.
なお、このような形状の電子ビームｌａ、ｌｂ。Note that the electron beams la and lb have such shapes.
１ｃは、磁界に代えて電界を用いても得ることができる
。即ち、磁極３ａ、３ｂ、３ｃ、３ｄの代りに電極を用
い、Ｎ極の位置に正極を、またＳ極の位置に負極を設置
すればよい。1c can also be obtained by using an electric field instead of a magnetic field. That is, electrodes may be used in place of the magnetic poles 3a, 3b, 3c, and 3d, and a positive pole may be placed at the north pole position and a negative pole may be placed at the south pole position.
実施例
第２図に示した四極の磁極を用いた電子ビーム形状制御
装置を用いて本発明の電子ビーム溶接を行った。EXAMPLE Electron beam welding of the present invention was carried out using an electron beam shape control device using four magnetic poles as shown in FIG.
なお、比較のため、従来法も行った。For comparison, a conventional method was also conducted.
試料として５Ｍ５０Ａ鋼を用い、加速電圧＝５０ｋＶ、
電子ビーム電流： ３００ ｍＡ ％溶接速度：３００
ａｎ／ｍ１ｎ１ レンズ電流： ４．８４Ａ、対物距
離：１７５ｍの条件下で行った。その結果は次の表−１
の通りであった。Using 5M50A steel as a sample, accelerating voltage = 50 kV,
Electron beam current: 300 mA % welding speed: 300
An/m1n1 Lens current: 4.84 A, Objective distance: 175 m. The results are in the following table-1
It was as follows.
表−１
この結果が示すように、従来法では被溶接物表面でアン
ダカット並びにハンピングビードが形成し、これに伴っ
て溶込み中央部に縦割れが発生したのに対し、本発明に
おける電子ビーム形状制御を行うと、美麗な表面ビード
が形成され、欠陥の発生がなかった。また、溶込み深さ
は従来法と比較して１．８倍に増し、鋭い溶込み形状が
得られた。Table 1 As shown in the results, in the conventional method, undercuts and humping beads were formed on the surface of the workpiece, and along with this, vertical cracks occurred at the center of penetration, whereas in the present invention, the By controlling the beam shape, a beautiful surface bead was formed and no defects occurred. Furthermore, the penetration depth was increased by 1.8 times compared to the conventional method, and a sharp penetration shape was obtained.
発明の効果
本発明の電子ビーム溶接法によると、低コストで、アン
ダカット並びに縦割れ等の高速溶接時に発生する諸欠陥
を防止することができ溶接作業の能率を向上させること
ができる。また、溶融幅が狭く、かつ溶込み深さの大き
い溶込み形状が得られるため、溶接変形が緩和され、高
精度で高品質の溶接継手が得られる等の優れた効果を奏
し得られる。Effects of the Invention According to the electron beam welding method of the present invention, various defects that occur during high-speed welding, such as undercuts and vertical cracks, can be prevented at low cost, and the efficiency of welding work can be improved. Further, since a penetration shape with a narrow melt width and a large penetration depth is obtained, welding deformation is alleviated, and excellent effects such as a highly accurate and high quality welded joint can be obtained.
図面は本発明の方法の一実施態様を示すもので、第１図
は電子ビームの形状制御方法の概要図、第２図は電子ビ
ーム形状制御装置の概要図、第３図は電子ビーム形状制
御による溶接方法を示す。
１、ｌａ、ｌｂ、ｌｃ：電子ビーム
２：収束レンズ ３：電子ビーム形状制御装置、３ａ、
３ｂ、３ｃ、３ｄ：磁極
３ａ’、３ｂ’、３ｃ’、３ｄ’：コイル４：電子ビー
ム形状制御装置を用いない場合の焦点位置
５：溶接方向 ６：電子ビーム孔
７：被溶接物
才１ 口
才３ 口The drawings show one embodiment of the method of the present invention, in which Fig. 1 is a schematic diagram of the electron beam shape control method, Fig. 2 is a schematic diagram of the electron beam shape control device, and Fig. 3 is a schematic diagram of the electron beam shape control method. The welding method is shown below. 1, la, lb, lc: electron beam 2: converging lens 3: electron beam shape control device, 3a,
3b, 3c, 3d: Magnetic poles 3a', 3b', 3c', 3d': Coil 4: Focus position when electron beam shape control device is not used 5: Welding direction 6: Electron beam hole 7: Welding object 1 Mouth 3
Claims (1)
過し収束途上にある電子ビームを、２極以上の遇数個の
磁極または電極で発生した磁界または電界内に通過せし
め、電子ビーム軸と垂直平面における電子ビームの形状
を溶込み方向全面に亘って、溶接線方向に長軸を有する
楕円またはこれに類似する形状に強制的に成形させた電
子ビームを用いて溶接することを特徴とする電子ビーム
溶接法。In high-power-density electron beam welding, the electron beam that is in the process of converging after passing through a converging lens is passed through a magnetic or electric field generated by two or more evenly distributed magnetic poles or electrodes, and is passed through a plane perpendicular to the electron beam axis. Welding is carried out using an electron beam whose shape is forcibly shaped into an ellipse or a similar shape having a long axis in the welding line direction over the entire surface in the penetration direction. Welding method.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9801185A JPS61255774A (en) | 1985-05-10 | 1985-05-10 | Electron beam welding method |
| US06/844,019 US4673794A (en) | 1985-05-10 | 1986-03-25 | Electron beam welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9801185A JPS61255774A (en) | 1985-05-10 | 1985-05-10 | Electron beam welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61255774A true JPS61255774A (en) | 1986-11-13 |
Family
ID=14207835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9801185A Pending JPS61255774A (en) | 1985-05-10 | 1985-05-10 | Electron beam welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61255774A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7693696B2 (en) | 2005-06-10 | 2010-04-06 | Chrysler Group Llc | System and methodology for zero-gap welding |
| US8198565B2 (en) | 2007-04-11 | 2012-06-12 | Chrysler Group Llc | Laser-welding apparatus and method |
| US8803029B2 (en) | 2006-08-03 | 2014-08-12 | Chrysler Group Llc | Dual beam laser welding head |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418441A (en) * | 1977-07-12 | 1979-02-10 | Nec Corp | Method and apparatus for welding by electron beam |
| JPS57142781A (en) * | 1981-02-27 | 1982-09-03 | Kawasaki Heavy Ind Ltd | Electron beam welding method |
-
1985
- 1985-05-10 JP JP9801185A patent/JPS61255774A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418441A (en) * | 1977-07-12 | 1979-02-10 | Nec Corp | Method and apparatus for welding by electron beam |
| JPS57142781A (en) * | 1981-02-27 | 1982-09-03 | Kawasaki Heavy Ind Ltd | Electron beam welding method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7693696B2 (en) | 2005-06-10 | 2010-04-06 | Chrysler Group Llc | System and methodology for zero-gap welding |
| US8253062B2 (en) | 2005-06-10 | 2012-08-28 | Chrysler Group Llc | System and methodology for zero-gap welding |
| US8803029B2 (en) | 2006-08-03 | 2014-08-12 | Chrysler Group Llc | Dual beam laser welding head |
| US8198565B2 (en) | 2007-04-11 | 2012-06-12 | Chrysler Group Llc | Laser-welding apparatus and method |
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