JP3153168B2 - Water rod / tab welding method - Google Patents
Water rod / tab welding methodInfo
- Publication number
- JP3153168B2 JP3153168B2 JP35361097A JP35361097A JP3153168B2 JP 3153168 B2 JP3153168 B2 JP 3153168B2 JP 35361097 A JP35361097 A JP 35361097A JP 35361097 A JP35361097 A JP 35361097A JP 3153168 B2 JP3153168 B2 JP 3153168B2
- Authority
- JP
- Japan
- Prior art keywords
- tab
- diameter tube
- welding
- water rod
- axis
- 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 - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Laser Beam Processing (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、原子炉発電用燃料
集合体におけるウォータロッド・タブの溶接方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for welding water rods and tabs in a fuel assembly for nuclear power generation.
【０００２】[0002]
【従来の技術】一般に、原子炉発電用燃料集合体におい
ては、多数本の燃料棒を互いに平行に束状に配設するこ
とにより構成されており、その多数の燃料棒からなる燃
料集合体のほぼ中心部にはウォータロッドが配設されて
いる。2. Description of the Related Art In general, a fuel assembly for nuclear power generation is constituted by arranging a number of fuel rods in a bundle in parallel with each other. A water rod is provided substantially at the center.
【０００３】上記ウォータロッドは、図４に示すよう
に、太径チューブ１の両端に中間端栓２を介して細径チ
ューブ３が溶接結合されており、上記太径チューブ１の
外面には同一軸線上に配列された複数個のタブ４が溶接
によって固設されている。[0003] As shown in FIG. 4, the water rod has a small-diameter tube 3 welded to both ends of a large-diameter tube 1 through an intermediate end plug 2, and the outer surface of the large-diameter tube 1 is the same. A plurality of tabs 4 arranged on the axis are fixed by welding.
【０００４】上記太径チューブ１に対するタブ４の溶接
にはＴＩＧ溶接、或はレーザ溶接が採用されている。図
５はＴＩＧ溶接の方法を示す図であり、太径ウォータチ
ューブ１の外表面にタブ４を固定して、タブ４の左右の
両溶接点毎にタングステン電極５を用意し、それぞれ電
極位置合わせを行って溶接する。また図６はレーザ溶接
の方法を示す図であり、タングステン電極の代りに２つ
の集光光学系により集光されたレーザ光を両溶接点に照
射する構造となっている。すなわち、一つのレーザソー
スからのレーザ光６を反射鏡の如き光分配器７，８ａに
より分配し、それを集光光学系９ａにより集光し、その
集光されたレーザ光を上記一方の溶接点に照射してその
溶接点の溶着を行ない、その後上記レーザソースからの
レーザ光６を光分配器７，８ｂにより反射させて集光光
学系９ｂにより集光し、その集光されたレーザ光を他方
の溶接点に照射してその溶接を行なう。[0004] TIG welding or laser welding is employed for welding the tab 4 to the large-diameter tube 1. FIG. 5 is a diagram showing a method of TIG welding, in which a tab 4 is fixed to the outer surface of the large diameter water tube 1, and tungsten electrodes 5 are prepared at both right and left welding points of the tab 4, and the respective electrodes are aligned. Perform welding. FIG. 6 is a view showing a method of laser welding, in which laser beams focused by two focusing optical systems are applied to both welding points instead of the tungsten electrode. That is, a laser beam 6 from one laser source is distributed by light distributors 7 and 8a such as reflecting mirrors, which are condensed by a condensing optical system 9a. The laser beam 6 from the laser source is reflected by the light distributors 7 and 8b and condensed by the condensing optical system 9b, and the condensed laser light is irradiated. To the other welding point to perform the welding.
【０００５】[0005]
【発明が解決しようとする課題】ところが、上記ＴＩＧ
溶接は溶接毎に微妙に位置合わせをする必要があるほ
か、溶接を繰り返すにしたがって定期的に電極交換をす
る必要があり、電極の真直度、電極取付バラツキ、先端
の研磨形状等の不確定要素が多く、ウォータロッド・タ
ブ溶接の自動化には問題がある。However, the above TIG
Welding requires delicate positioning for each welding, and requires periodic electrode replacement as welding is repeated. Uncertainties such as electrode straightness, electrode mounting variations, and tip polished shape There is a problem in automation of water rod and tab welding.
【０００６】一方、レーザ溶接は、レーザ光が制御性に
富んだビームであり、その位置決めに秀でた特性をもっ
ている。したがって、ウォータロッド・タブ溶接方法に
おける自動溶接化にはレーザ溶接が適している。中でも
高出力を比較的容易に得られるＣＯ2 レーザやＹＡＧレ
ーザの利用が期待できる。しかし、前述のように従来の
方法では光学系が各々２式必要となり、かつ各々の光学
系には、正確な位置決めをし、ビームスキャンしてシー
ム溶接するために、その制御軸としてＸＹＺの３軸を用
意する必要がある。なおかつレーザ光軸として斜方向軸
を基本軸に制御する方がベターとなるが、これには装置
上の構成がより複雑となるほか、２方向からのレーザ光
軸の双方アライメント調整をはじめとするメンテナンス
が煩雑となってそのメンテナンスにかなりの労力を要す
る等の問題がある。[0006] On the other hand, laser welding is a beam in which laser light is rich in controllability, and has excellent characteristics for positioning. Therefore, laser welding is suitable for automatic welding in the water rod / tab welding method. In particular, use of a CO 2 laser or a YAG laser which can obtain high output relatively easily can be expected. However, as described above, the conventional method requires two optical systems, and each optical system has three control axes of XYZ as its control axes for performing accurate positioning, beam scanning, and seam welding. You need to prepare an axis. In addition, it is better to control the oblique axis as the basic axis as the laser optical axis, but this requires a more complicated configuration on the apparatus, and also involves adjusting the alignment of the laser optical axes from two directions. There is a problem that the maintenance is complicated and the maintenance requires considerable labor.
【０００７】本発明はこのような点に鑑み、従来の自動
化困難なＴＩＧ溶接方法に代えてレーザ光を採用すると
ともに、その光学系をシンプル化してウォータロッド・
タブ溶接の自動化を可能とする溶接方法を得ることを目
的とする。In view of the above, the present invention employs a laser beam instead of the conventional TIG welding method, which is difficult to automate, and simplifies the optical system of the water rod.
It is an object of the present invention to obtain a welding method that enables automation of tab welding.
【０００８】[0008]
【課題を解決するための手段】本発明は、ウォータロッ
ドの太径チューブの外面にタブをレーザ光によって溶接
するウォータロッド・タブの溶接方法において、上記ウ
ォータロッドをその軸線回りに回転可能に回転式クラン
パーに装着し、上記タブの最初に溶接される第１の面が
レーザ光軸に対して所定角度になるように上記ウォータ
ロッドを回転固定した後、レーザ光を照射して上記タブ
の第１の面側を太径チューブに溶接し、その後太径チュ
ーブの中心軸線を通り上記レーザ光軸に平行な平面に対
して上記タブが対称位置になるように太径チューブを回
転させるとともに、レーザ溶接装置の集光光学系を太径
チューブと相対的に上記平面に対して直交する方向に平
行移動させ、タブの第２の面側と太径チューブとの溶接
を行うことを特徴とする。According to the present invention, there is provided a method for welding a water rod and a tab, wherein the tab is welded to an outer surface of a large diameter tube of the water rod by a laser beam, wherein the water rod is rotatably rotatable around its axis. The water rod is mounted on a clamper, and the water rod is rotated and fixed so that the first surface to be welded first of the tab is at a predetermined angle with respect to the laser optical axis. 1 is welded to the large-diameter tube, and then the large-diameter tube is rotated so that the tab is symmetrical with respect to a plane passing through the center axis of the large-diameter tube and parallel to the laser optical axis. The condensing optical system of the welding device is translated relative to the large-diameter tube in a direction perpendicular to the plane, and the second surface side of the tab is welded to the large-diameter tube. To.
【０００９】[0009]
【発明の実施の形態】以下、図１乃至図３を参照して本
発明の実施の形態について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１０】図１において、符号１０は集光光学系であ
って、その集光光学系１０から照射されたレーザ光１１
が垂直下方に照射されるようにしてあり、上記集光光学
系１０は、ウォータロッドの太径チューブ１の長手軸線
に沿うＸ方向、その太径チューブ１の軸線に直交するＹ
方向、及び上下方向のＺ方向の３軸方向に移動可能とし
てある。一方、ワークである太径チューブ１は図３に示
すように、回転式クランパー１２によって保持されると
ともに、太径チューブ１の中心軸を中心に所定角度スイ
ングできるようにしてある。In FIG. 1, reference numeral 10 denotes a condensing optical system, and a laser beam 11 radiated from the converging optical system 10.
Is converged vertically downward, and the condensing optical system 10 is arranged so that the Y direction orthogonal to the X-axis along the longitudinal axis of the large-diameter tube 1 of the water rod and the axis of the large-diameter tube 1 is provided.
It is movable in three axial directions, i.e., a vertical direction and a vertical Z direction. On the other hand, as shown in FIG. 3, the large-diameter tube 1, which is a work, is held by the rotary clamper 12, and is capable of swinging a predetermined angle about the central axis of the large-diameter tube 1.
【００１１】そこで、回転式クランパー１２によって保
持された太径チューブ１を第１の回転位置まで回転させ
その位置に静止固定させる。すなわち、太径チューブ１
に固定されたタブ４の第１面が上向きになるようにし、
そのタブ４の固定位置における太径チューブ１の外周面
との接線とタブ４の第１面とで形成されるＶ字状の谷部
の２等分線が垂直となるようにする。その後集光光学系
１０をＹ軸方向に移動させて、そのレーザ光の光軸１３
を上記溶接部であるＶ字状の谷部の２等分線と一致する
ようにする。同時に集光光学系１０をＺ軸方向に駆動さ
せて適当な集光焦点距離に設定する。Therefore, the large-diameter tube 1 held by the rotary clamper 12 is rotated to a first rotation position and fixed at that position. That is, the large-diameter tube 1
So that the first surface of the tab 4 fixed to the
The V-shaped valley bisector formed by the tangent to the outer peripheral surface of the large-diameter tube 1 at the fixed position of the tab 4 and the first surface of the tab 4 is set to be vertical. Thereafter, the condensing optical system 10 is moved in the Y-axis direction, and the optical axis 13 of the laser light is moved.
Is made to coincide with the bisector of the V-shaped valley, which is the above welded portion. At the same time, the focusing optical system 10 is driven in the Z-axis direction to set an appropriate focusing focal length.
【００１２】しかる後、レーザ光１１を照射させて、図
２に示すようにレーザ光の光軸１３を太径チューブ１の
軸方向と平行にＸ軸方向にビームスキャンして、タブ４
の第１面と太径チューブ１とのシーム溶接を行う。Thereafter, the laser beam 11 is irradiated, and the optical axis 13 of the laser beam is beam-scanned in the X-axis direction parallel to the axial direction of the large-diameter tube 1 as shown in FIG.
Is seam-welded to the large-diameter tube 1.
【００１３】このようにして、タブ４の第１面と太径チ
ューブ１との溶接が終ると、溶接されたタブ４の溶接位
置と反対側の第２面がレーザ光１１に対して上向きにな
るように回転式クランパー１２を正確に９０度回転さ
せ、図１の点線で示すように、太径チューブ１の中心軸
線を通りレーザ光１１の軸線１３に平行な平面に対して
タブ４が最初の溶接位置と対称位置になるように回動さ
せる。そこで、集光光学系１０をＹ方向に移動させ、レ
ーザ光の軸線がタブ４の第２面と太径チューブの接線と
で形成されるＶ字状谷部の２等分線と一致するようにす
る。すなわちタブ４の第２面の溶接位置に対してレーザ
光の軸線を一致させる。その後レーザ光を照射させてビ
ームスキャンすることによりタブ４の第２面の溶接を行
う。When the welding of the first surface of the tub 4 to the large-diameter tube 1 is completed, the second surface of the tub 4 opposite to the welding position of the tub 4 is directed upward with respect to the laser beam 11. The rotary clamper 12 is rotated by exactly 90 degrees so that the tab 4 is first positioned with respect to a plane passing through the central axis of the large-diameter tube 1 and parallel to the axis 13 of the laser beam 11 as shown by the dotted line in FIG. Is rotated so as to be symmetrical with the welding position. Then, the condensing optical system 10 is moved in the Y direction so that the axis of the laser beam coincides with the bisector of the V-shaped valley formed by the second surface of the tab 4 and the tangent of the large diameter tube. To That is, the axis of the laser beam is made to coincide with the welding position of the second surface of the tab 4. Thereafter, the second surface of the tab 4 is welded by irradiating a laser beam and performing beam scanning.
【００１４】このようにして、一つ目のタブ４が太径チ
ューブ１の外面に溶接されると、太径チューブ１を元の
回転原点である−９０度方向に正確に戻し、タブが図１
の実線で示す位置になるように戻す。次に、太径チュー
ブ１の軸線に平行方向にすでに溶接された第１のタブ４
と一定間隔離して１列に並ぶように次のタブを供給固定
するとともに、集光光学系１０とＹ軸方向に逆方向に一
定距離ｙだけ移動させレーザ光軸をタブの溶接位置に一
致させ、前述と同様にレーザ光をＸ軸方向に移動させる
ことによりシーム溶接を行う。また、上記２番目のタブ
の第２面の溶接も前記第１番目のタブの溶接と同一方法
で行う。以下、所定の全てのタブを溶接するまで、この
位置決め並びに溶接手法を順次繰り返す。When the first tab 4 is welded to the outer surface of the large-diameter tube 1 in this manner, the large-diameter tube 1 is accurately returned in the original rotation origin of -90 degrees, and 1
To the position shown by the solid line. Next, the first tab 4 already welded in a direction parallel to the axis of the large-diameter tube 1.
The next tabs are supplied and fixed so as to be arranged in a line while being spaced apart from each other by a certain distance, and the laser beam axis is made to coincide with the welding position of the tabs by moving the laser beam axis by a certain distance y in the opposite direction to the Y-axis direction with respect to the condensing optical system 10. The seam welding is performed by moving the laser beam in the X-axis direction in the same manner as described above. The welding of the second surface of the second tab is performed in the same manner as the welding of the first tab. Hereinafter, this positioning and welding method are sequentially repeated until all the predetermined tabs are welded.
【００１５】なお、上記実施の形態においては、集光光
学系をＹ軸方向に移動させるものを示したが、太径チュ
ーブをＹ軸方向に移動させるようにしてもよい。In the above embodiment, the light-gathering optical system is moved in the Y-axis direction. However, the large-diameter tube may be moved in the Y-axis direction.
【００１６】[0016]
【発明の効果】以上説明したように、本発明はタブの両
面を溶接する場合に、太径ロッドを軸線回りに回転さ
せ、タブの溶接しようとする面と太径ロッドの外周面と
で形成されるＶ字状の谷部がレーザ光の光軸方向一致す
るようにしたので、集光光学系をＹ軸方向に移動させる
ことによってタブの両面の溶接を行うことができ、１式
の集光光学系によってレーザ溶接を行うことができる。
しかも、上記集光光学系はその光軸が一定方向例えば垂
直方向に向くように設定し、その状態で水平方向或は垂
直方向に移動し得るようにすればよいので、溶接機構を
簡単にするとともにその制御も極めて容易であり、一連
の自動溶接を達成することができる。As described above, according to the present invention, when welding both sides of the tab, the large diameter rod is rotated around the axis, and the surface to be welded of the tab and the outer peripheral surface of the large diameter rod are formed. Since the V-shaped valleys to be formed coincide with the optical axis direction of the laser light, welding of both sides of the tab can be performed by moving the condensing optical system in the Y-axis direction. Laser welding can be performed by an optical optical system.
In addition, the condensing optical system may be set so that its optical axis is directed in a fixed direction, for example, in a vertical direction, and can be moved in the horizontal or vertical direction in that state, so that the welding mechanism is simplified. At the same time, the control is extremely easy, and a series of automatic welding can be achieved.
【図１】本発明のレーザ光と太径チューブ並びにタブの
溶接位置関係を示す図。FIG. 1 is a view showing a welding positional relationship between a laser beam of the present invention, a large-diameter tube, and a tab.
【図２】ビームスキャン状態を示す図。FIG. 2 is a diagram showing a beam scanning state.
【図３】太径チューブのスウイング回転説明図。FIG. 3 is an explanatory view of swing rotation of a large-diameter tube.
【図４】ウォータロッドの概略構成を示す図。FIG. 4 is a diagram showing a schematic configuration of a water rod.
【図５】従来のＴＩＧ溶接方法を示す図。FIG. 5 is a view showing a conventional TIG welding method.
【図６】従来のレーザ溶接方法を示す図。FIG. 6 is a view showing a conventional laser welding method.
１ 太径チューブ ４ タブ １０ 集光光学系 １１ レーザ光 １２ 回転式クランパー １３ レーザ光の光軸 DESCRIPTION OF SYMBOLS 1 Large diameter tube 4 Tab 10 Condensing optical system 11 Laser beam 12 Rotary clamper 13 Optical axis of laser beam
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−91969（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G21C 21/00 B23K 26/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-91969 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G21C 21/00 B23K 26/00
Claims (2)
ブをレーザ光によって溶接するウォータロッド・タブの
溶接方法において、上記ウォータロッドをその軸線回り
に回転可能に回転式クランパーに装着し、上記タブの最
初に溶接される第１の面がレーザ光軸に対して所定角度
になるように上記ウォータロッドを回転固定した後、レ
ーザ光を照射して上記タブの第１の面側を太径チューブ
に溶接し、その後太径チューブの中心軸線を通り上記レ
ーザ光軸に平行な平面に対して上記タブが対称位置にな
るように太径チューブを回転させるとともに、レーザ溶
接装置の集光光学系を太径チューブと相対的に上記平面
に対して直交する方向に平行移動させ、タブの第２の面
側と太径チューブとの溶接を行うことを特徴とする、ウ
ォータロッド・タブ溶接方法。1. A method of welding a water rod and a tab, wherein the tab is welded to an outer surface of a large diameter tube of the water rod by a laser beam, wherein the water rod is mounted on a rotary clamper so as to be rotatable around its axis. After the water rod is rotated and fixed so that the first surface to be welded first is at a predetermined angle with respect to the laser optical axis, the first surface side of the tab is irradiated with laser light to form a large-diameter tube. And then rotate the large-diameter tube so that the tab is at a symmetrical position with respect to a plane passing through the central axis of the large-diameter tube and parallel to the laser optical axis. A water rod / taper, which is translated relative to the large diameter tube in a direction perpendicular to the plane and welds the second surface side of the tab to the large diameter tube. Welding method.
１光軸とすることを特徴とする、請求項１記載のウォー
タロッド・タブ溶接方法。2. The water rod / tab welding method according to claim 1, wherein the laser optical axis of the condensing optical system is one optical axis directed vertically downward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35361097A JP3153168B2 (en) | 1997-12-22 | 1997-12-22 | Water rod / tab welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35361097A JP3153168B2 (en) | 1997-12-22 | 1997-12-22 | Water rod / tab welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11183685A JPH11183685A (en) | 1999-07-09 |
| JP3153168B2 true JP3153168B2 (en) | 2001-04-03 |
Family
ID=18432016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35361097A Expired - Fee Related JP3153168B2 (en) | 1997-12-22 | 1997-12-22 | Water rod / tab welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3153168B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4607064B2 (en) * | 2006-07-20 | 2011-01-05 | 原子燃料工業株式会社 | Stopper welding equipment |
| JP5066660B2 (en) * | 2007-08-29 | 2012-11-07 | エンシュウ株式会社 | Periodic structure machining control method and periodic structure machining control apparatus |
| CN113814540B (en) * | 2021-09-23 | 2023-02-03 | 成都华远焊接设备股份有限公司 | Gun aligning method of intelligent gantry welding machine |
-
1997
- 1997-12-22 JP JP35361097A patent/JP3153168B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11183685A (en) | 1999-07-09 |
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