JPH0370577B2 - - Google Patents
Info
- Publication number
- JPH0370577B2 JPH0370577B2 JP62077684A JP7768487A JPH0370577B2 JP H0370577 B2 JPH0370577 B2 JP H0370577B2 JP 62077684 A JP62077684 A JP 62077684A JP 7768487 A JP7768487 A JP 7768487A JP H0370577 B2 JPH0370577 B2 JP H0370577B2
- Authority
- JP
- Japan
- Prior art keywords
- recess
- nugget
- filler member
- thin plate
- straps
- 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 - Lifetime
Links
- 239000000945 filler Substances 0.000 claims description 32
- 238000003466 welding Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 3
- 229910001093 Zr alloy Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BIJOYKCOMBZXAE-UHFFFAOYSA-N chromium iron nickel Chemical compound [Cr].[Fe].[Ni] BIJOYKCOMBZXAE-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
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
- Butt Welding And Welding Of Specific Article (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は薄板を互いに交差させ、その交差部
を溶接する薄板構造部の接合方法に係わり、特に
燃料集合体の支持格子を構成する薄板帯状のスト
ラツプの接合方法に関する。Detailed Description of the Invention "Field of Industrial Application" This invention relates to a method of joining thin plate structures in which thin plates are crossed with each other and the intersections are welded. This invention relates to a method for joining straps.
「従来の技術」
周知のように、燃料集合体には、第１１図に示
すように、上下方向に離間して対向配置された上
部ノズル１と下部ノズル２との間に、複数の制御
棒案内管３が掛け渡されて固定され、これら制御
棒案内管３の中途部に、多数の燃料棒４を支持す
るための複数の支持格子５が上下方向に互いに離
間して取り付けられている。"Prior Art" As is well known, in a fuel assembly, as shown in FIG. Guide tubes 3 are stretched and fixed, and a plurality of support grids 5 for supporting a large number of fuel rods 4 are attached at midpoints of these control rod guide tubes 3 to be spaced apart from each other in the vertical direction.
上記支持格子５は、多数の格子空間５ａを画成
するように、鉄−クロム−ニツケル系超合金（イ
ンコネル）やジルコニウム系合金（ジルカロイ）
等の薄板帯状のストラツプを以下のようにして格
子状に組み接合したものである。 The support lattice 5 is made of iron-chromium-nickel superalloy (Inconel) or zirconium alloy (Zircaloy) so as to define a large number of lattice spaces 5a.
The straps are made of thin plate strips such as the following, assembled and joined in a lattice shape as follows.
すなわち、第１２図および第１３図に示すよう
に、各ストラツプ６を互いに直交させて格子状に
組んだ後、これらストラツプ６の交差部分に突出
形成された溶接タブ７をTIG、電子ビームやレー
ザ等により溶融して、ナゲツト幅L1、ナゲツト
深さD1の平面視矩形状をなす溶接ナゲツト１０
を形成することにより、各ストラツプ６同士の接
合が行なわれている。 That is, as shown in FIGS. 12 and 13, after the straps 6 are arranged perpendicularly to each other in a lattice shape, welding tabs 7 protruding from the intersections of these straps 6 are welded using TIG, an electron beam, or a laser beam. A weld nugget 10 which is melted by such methods and forms a rectangular shape in a plan view with a nugget width L 1 and a nugget depth D 1 .
By forming the straps 6, the straps 6 are joined together.
このようにして形成された支持格子５の各格子
空間５ａには、第１４図に示すように燃料棒４が
挿通され、この格子空間５ａを画成する壁部（ス
トラツプ）に形成されたデインプル７およびスプ
リング８より挾持されるようになつている。 As shown in FIG. 14, fuel rods 4 are inserted into each lattice space 5a of the support lattice 5 formed in this way, and the dimples formed in the wall portions (straps) defining this lattice space 5a are inserted. 7 and a spring 8.
そして、上記支持格子５を備えた燃料集合体で
は、原子炉の稼働時に、冷却水が格子空間５ａを
画成する壁部と燃料棒４との間を通り抜ける間
に、燃料棒４と熱交換されて加熱されるようにな
つている。 In the fuel assembly equipped with the support grid 5, during operation of the reactor, cooling water passes between the fuel rods 4 and the wall defining the grid space 5a, while exchanging heat with the fuel rods 4. It is now heated.
「発明が解決しようとする問題点」
ところで、上記支持格子５のストラツプ６の接
合方法において、各ストラツプ６同士の溶接強度
を高めるには、上記溶接タブ７のボリユームを大
きくすればよい。"Problems to be Solved by the Invention" By the way, in the method for joining the straps 6 of the support grid 5, in order to increase the welding strength between the straps 6, it is sufficient to increase the volume of the welding tabs 7.
ところが、ボリユームを大きくすると、第１３
図における溶接ナゲツト１０のナゲツト幅L1が
長くなる。このナゲツト幅L1が長くなると、冷
却水の流路断面積が減少し、流水抵抗が増大す
る。この流水抵抗が増大すると、熱交換率が低下
するという不具合点が生じてしまうという問題が
あつた。 However, when the volume is increased, the 13th
The nugget width L1 of the weld nugget 10 in the figure becomes longer. When the nugget width L1 increases, the cross-sectional area of the cooling water flow path decreases, and the water flow resistance increases. When this water flow resistance increases, there is a problem in that the heat exchange rate decreases.
「発明の目的」
この発明は、上記問題点を解消するためになさ
れたものであり、ナゲツト幅を増大させることな
く溶接強度を高めることができる薄板構造部の接
合方法を提供することを目的としている。``Object of the Invention'' This invention was made to solve the above problems, and its purpose is to provide a method for joining thin plate structures that can increase welding strength without increasing the nugget width. There is.
「問題点を解決するための手段」
この発明は、薄板を互いに交差させ、形成され
た交差線の端部に、交差線に沿つて延びる凹部を
形成し、この凹部に溶加部材を配置し、次いでこ
の溶加部材および凹部を溶融固化させることによ
り交差線の端部を溶接することを特徴としてい
る。"Means for Solving the Problem" This invention involves making thin plates intersect with each other, forming a recess extending along the intersecting line at the end of the formed intersecting line, and disposing a filler member in this recess. Then, the filler member and the recess are melted and solidified to weld the ends of the intersection line.
「実施例」
第１図ないし第６図はこの発明の一実施例を示
すものである。Embodiment FIGS. 1 to 6 show an embodiment of the present invention.
第１図はこの発明の薄板構造部の接合方法によ
つて支持された支持格子における接合箇所を示す
ものであり、図中符号２０は互いに直交するよう
に組まれて上記支持格子を構成するストラツプ
（薄板）の要部を示す。 FIG. 1 shows the joints in a support grid supported by the thin plate structure joining method of the present invention, and reference numerals 20 in the figure indicate straps assembled perpendicularly to each other to constitute the support grid. The main parts of (thin plate) are shown.
これらストラツプ２０の交差線の上端部には、
交差線に沿つて図中下方に延びる溶接ナゲツト２
１が形成されており、この溶接ナゲツト２１によ
り、ストラツプ２０同士の交差線の上端部が接合
されている。この溶接ナゲツト２１のナゲツト幅
L2は第１３図に示した従来の溶接ナゲツト１０
のナゲツト幅L1とほぼ同一であるが、ナゲツト
深さD2は従来のナゲツト深さD1より長くなつて
いる。 At the upper end of the intersecting line of these straps 20,
Welding nugget 2 extending downward in the figure along the intersection line
1 is formed, and the upper ends of the intersecting lines of the straps 20 are joined by this weld nugget 21. Nugget width of this weld nugget 21
L 2 is the conventional welding nugget 10 shown in FIG.
The nugget width L1 is approximately the same as that of the conventional nugget, but the nugget depth D2 is longer than the conventional nugget depth D1 .
次に、上記のような溶接ナゲツト２１を形成す
る方法、すなわち各ストラツプ２０同士の接合方
法を説明する。 Next, a method of forming the weld nugget 21 as described above, that is, a method of joining each strap 20 together will be explained.
まず、第２図に示すように、各ストラツプ２０
上縁部の所定の位置（ストラツプ２０を交差させ
た際に形成される交差線の上端部）に、下端部が
Ｖ字状をなし、かつ切欠幅Ｌが上記ナゲツト２１
のナゲツト幅L2より若干短く、かつ切欠深さＤ
がナゲツト深さD2より若干浅い切欠部２２を形
成する。そして、これら切欠部２２が形成された
各ストラツプ２０同士を互いに直交させることに
より交差線の上端部に凹部２３を形成する。 First, as shown in FIG.
At a predetermined position of the upper edge (the upper end of the intersection line formed when the straps 20 are crossed), the lower end has a V-shape, and the notch width L is equal to the nugget 21.
Slightly shorter than nugget width L 2 and notch depth D
forms a notch 22 that is slightly shallower than the nugget depth D2 . Then, by making the straps 20 with these notches 22 orthogonal to each other, a recess 23 is formed at the upper end of the intersecting line.
次に、この凹部２３に、同凹部２３より容積が
小さく、下端部が断面三角形状をなす略円柱状の
溶加ピン（溶加部材）２４を挿入する。 Next, a substantially cylindrical filler pin (filler member) 24 whose volume is smaller than that of the recess 23 and whose lower end portion has a triangular cross section is inserted into the recess 23 .
そして、この溶加ピン２４および同溶加ピン２
４を囲む上記ストラツプ２０を溶融させる。する
と、第３図に示すように溶融した部分Ａが若干溶
融ピン２４の径方向に膨らむと共に、下方に延び
て固化する。 Then, this filler pin 24 and the same filler pin 2
The strap 20 surrounding 4 is melted. Then, as shown in FIG. 3, the molten portion A swells slightly in the radial direction of the molten pin 24, extends downward, and solidifies.
次に、第４図に示すように、固化した部分Ｂ上
に形成された凹部２５に略円柱状をなす次の溶加
ピン（溶加部材）２６を挿入する。 Next, as shown in FIG. 4, the next approximately cylindrical filler pin (filler member) 26 is inserted into the recess 25 formed on the solidified portion B.
そして、この溶加ピン２６および凹部２５の内
壁面を溶融する。すると、この溶融した部分がそ
の熱により上記固化した部分Ｂをその接触部にお
いて溶融させる。 Then, the filler pin 26 and the inner wall surface of the recess 25 are melted. Then, the heat of this melted portion causes the solidified portion B to melt at the contact portion.
そして、これらを固化させることにより、第５
図および第６図に示すような溶接ナゲツト２１を
形成する。このようにして、ストラツプ２０同士
の交差線の上端部を溶接する。 Then, by solidifying these, the fifth
A weld nugget 21 as shown in FIG. 6 is formed. In this way, the upper ends of the intersecting lines of the straps 20 are welded.
上記ストラツプ２０同士の接合方法によれば、
溶接ナゲツト２１のナゲツト幅L2を従来の溶接
ナゲツト１０のナゲツト幅L1とほぼ同一にして、
ナゲツト深さD2を従来のナゲツト深さD1より深
くすることができる。すなわち、冷却水の流路断
面積は従来とほぼ同一であるので、流水抵抗を増
大させることなくストラツプ２０同士の溶接強度
を高めることができる。 According to the method of joining the straps 20,
The nugget width L2 of the welding nugget 21 is made almost the same as the nugget width L1 of the conventional welding nugget 10,
The nugget depth D2 can be made deeper than the conventional nugget depth D1 . That is, since the cross-sectional area of the cooling water flow path is almost the same as that of the conventional case, the welding strength between the straps 20 can be increased without increasing the flow resistance.
なお、上記実施例では、溶接ナゲツト２１を二
段階に分けて形成したが、この発明はこれに限る
ことなく三段階以上の複数回に分けて行つてもよ
いし、さらに段階を踏まず一回で行つてもよい。
この場合においても、上記凹部２３の深さＤは従
来のナゲツト深さD1より深いので凹部２３の容
積に見合う溶加ピンを用いることにより上記容積
ナゲツト２１を形成することができる。 In the above embodiment, the welding nugget 21 is formed in two stages, but the present invention is not limited to this, and the welding nugget 21 may be formed in three or more stages, or may be formed in one step without further steps. You can go there.
In this case as well, since the depth D of the recess 23 is deeper than the conventional nugget depth D1 , the volume nugget 21 can be formed by using a filler pin corresponding to the volume of the recess 23.
さらに、上記実施例では、第２図に示すような
形状の溶加ピン２４を用いたが、第７図ないし第
１０図に示すような形状の溶加ピン２４ａ〜２４
ｄのいずれかを用いてもよく、さらに適切なボリ
ユームが得られる寸法を考慮すれば、これらに限
定されず他の各種形状のものでも同様の効果が得
られる。 Further, in the above embodiment, the filler pin 24 having the shape as shown in FIG. 2 was used, but the filler pins 24a to 24 having the shape as shown in FIGS.
d may be used, and the shape is not limited to these, and similar effects can be obtained with other shapes as long as the dimensions that provide an appropriate volume are taken into consideration.
「発明の効果」
以上説明したように、この発明によれば、薄板
同士の交差線の端部に、この交差線に沿つて延び
る凹部を形成し、この凹部に溶加部材を配置し、
次いで、この溶加部材および凹部を溶融固化させ
ることにより、交差線の端部を溶接したので、交
差線端部の溶接幅を大きくすることなく、凹部の
深さ分だけ交差線上を溶接することができる。し
たがつて、上記溶接幅を増大させることなく溶接
強度を高めることができる。"Effects of the Invention" As explained above, according to the present invention, a recess extending along the intersecting line between thin plates is formed at the end of the intersecting line, and a filler member is disposed in the recess,
Next, by melting and solidifying this filler member and the recess, the ends of the intersecting line were welded, so it was possible to weld on the intersecting line by the depth of the recess without increasing the welding width at the end of the intersecting line. I can do it. Therefore, welding strength can be increased without increasing the welding width.
第１図ないし第５図はこの発明の一実施例を示
す図であり、第１図は互いに接合されたストラツ
プの要部を示す斜視図、第２図はストラツプに形
成された凹部を示す斜視図、第３図は凹部に溶加
ピンを挿入した後この溶加ピンおよび凹部を溶融
させた状態を示す断面図、第４図は、固化した溶
加ピン上の凹部に次の溶加ピンを挿入した状態を
示す断面図、第５図は溶接ナゲツトを示す断面
図、第６図は第５図における矢視図、第７図な
いし第１０図はそれぞれ溶加ピンの変形例を示す
斜視図、第１１図は燃料集合体の正面図、第１２
図ないし第１４図は従来のストラツプ同士の接合
方法を説明するための図であり、第１２図はスト
ラツプに形成された溶接タブを示す斜視図、第１
３図は溶接ナゲツトを示す斜視図、第１４図は支
持格子の要部を示す平面図である。
２０……ストラツプ（薄板）、２４，２４ａ〜
２４ｄ……溶加ピン（溶加部材）、２３，２５…
…凹部、２６……溶加ピン（次の溶加部材）。
Figures 1 to 5 are views showing an embodiment of the present invention, with Figure 1 being a perspective view showing the main parts of the straps joined together, and Figure 2 being a perspective view showing the recesses formed in the strap. Figure 3 is a sectional view showing the state in which the filler pin is inserted into the recess and the filler pin and the recess are melted, and Figure 4 is a cross-sectional view showing the state in which the filler pin is inserted into the recess on the solidified filler pin. 5 is a sectional view showing the welding nugget, FIG. 6 is a view taken in the direction of the arrow in FIG. 5, and FIGS. 7 to 10 are perspective views showing modified examples of the filler pin. Figure 11 is a front view of the fuel assembly, Figure 12 is a front view of the fuel assembly.
Figures 1 to 14 are diagrams for explaining the conventional method of joining straps together, and Figure 12 is a perspective view showing welding tabs formed on the straps.
FIG. 3 is a perspective view showing the welding nugget, and FIG. 14 is a plan view showing the main parts of the support grid. 20...Strap (thin plate), 24, 24a~
24d... Filler pin (filler member), 23, 25...
... recess, 26... filler pin (next filler member).
Claims (1)
端部を溶接する薄板構造部の接合方法において、
上記交差線の端部に、交差線に沿つて延びる凹部
を形成し、この凹部に溶加部材を配置し、次いで
この溶加部材およびこの溶加部材を囲む薄板を溶
融固化させることにより上記交差線の端部を溶接
することを特徴とする薄板構造部の接合方法。 ２ 薄板を互いに交差させ、形成された交差線の
端部を溶接する薄板構造部の接合方法において、
上記交差線の端部に、交差線に沿つて延びる凹部
を形成し、この凹部に溶加部材を配置した後、こ
の溶加部材および同溶加部材を囲む上記薄板を溶
融固化させ、その後、上記溶融固化された溶加部
材上に形成される凹部に次の溶加部材を配置し
て、この溶接加部材および同溶加部材が位置して
いる上記凹部を溶融固化させる工程を複数回繰り
返すことにより上記交差線の端部を溶接すること
を特徴とする薄板構造部の接合方法。[Claims] 1. A method for joining thin plate structures in which thin plates are crossed with each other and the ends of the formed intersection lines are welded,
A recess extending along the intersecting line is formed at the end of the intersecting line, a filler member is placed in the recess, and the filler member and the thin plate surrounding the filler member are then melted and solidified. A method for joining thin plate structures, characterized by welding the ends of wires. 2. In a method for joining thin plate structures in which thin plates are crossed with each other and the ends of the formed crossing lines are welded,
A recess extending along the intersecting line is formed at the end of the intersecting line, a filler member is placed in the recess, the filler member and the thin plate surrounding the filler member are melted and solidified, and then, The next filler member is placed in the recess formed on the melted and solidified filler member, and the process of melting and solidifying the welding member and the recess in which the filler member is located is repeated multiple times. A method for joining thin plate structures, characterized in that the ends of the intersecting lines are welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62077684A JPS63242472A (en) | 1987-03-31 | 1987-03-31 | Method for connecting sheet metal structure part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62077684A JPS63242472A (en) | 1987-03-31 | 1987-03-31 | Method for connecting sheet metal structure part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63242472A JPS63242472A (en) | 1988-10-07 |
| JPH0370577B2 true JPH0370577B2 (en) | 1991-11-08 |
Family
ID=13640721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62077684A Granted JPS63242472A (en) | 1987-03-31 | 1987-03-31 | Method for connecting sheet metal structure part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63242472A (en) |
-
1987
- 1987-03-31 JP JP62077684A patent/JPS63242472A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63242472A (en) | 1988-10-07 |
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