JP3081989B2 - Expanding and contracting core device for preventing pressure deformation of cylindrical body - Google Patents

Expanding and contracting core device for preventing pressure deformation of cylindrical body

Info

Publication number
JP3081989B2
JP3081989B2 JP08104301A JP10430196A JP3081989B2 JP 3081989 B2 JP3081989 B2 JP 3081989B2 JP 08104301 A JP08104301 A JP 08104301A JP 10430196 A JP10430196 A JP 10430196A JP 3081989 B2 JP3081989 B2 JP 3081989B2
Authority
JP
Japan
Prior art keywords
expansion
contraction
core
hole
wall surface
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
Application number
JP08104301A
Other languages
Japanese (ja)
Other versions
JPH09269391A (en
Inventor
豊 星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nuclear Fuel Industries Ltd
Original Assignee
Nuclear Fuel Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nuclear Fuel Industries Ltd filed Critical Nuclear Fuel Industries Ltd
Priority to JP08104301A priority Critical patent/JP3081989B2/en
Publication of JPH09269391A publication Critical patent/JPH09269391A/en
Application granted granted Critical
Publication of JP3081989B2 publication Critical patent/JP3081989B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

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  • Pipe Accessories (AREA)
  • Processing Of Terminals (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は沸騰水型核燃料集合
体におけるウォータチャンネルの外表面に、所要部材を
抵抗溶接により溶着する場合とか、鋼管などの成形加工
などに際し、予め、上記ウォータチャンネル角管内と
か、丸形の鋼管内に嵌装しておき、抵抗溶接や成形加工
による外圧が印加されても、不本意に薄板で構成される
角管や丸管が加圧変形したり、歪んでしまうことを防止
するため用いられている中子に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for welding a required member to the outer surface of a water channel of a boiling water type nuclear fuel assembly by resistance welding or forming a steel pipe or the like. Or, even if it is fitted in a round steel pipe and an external pressure is applied by resistance welding or molding, the square pipe or round pipe made of a thin plate is undesirably deformed by pressure or distorted It is related to the core used to prevent this.

【0002】[0002]

【従来の技術】いま一例として、図10に示す如き沸騰
水型核燃料集合体1に係る中子使用の状態を説示する
と、既知の如く当該沸騰水型核燃料集合体1は、上部タ
イプレート1aと下部タイプレート1bとの間に多数の
燃料棒2とウォータチャンネル3を、所要複数のスぺー
サ4により支持拘束の状態で保持したもので、上記のウ
ォータチャンネル3は図11に示されている通り、上位
側から順次上部端栓3a、接続部材3b、ウォータチャ
ンネル角管3c、下部端栓3dを溶接したものであり、
これらの溶接はTIGスポット溶接、レーザ溶接、E・
B溶接等を採用しているので問題はないが、高燃焼度用
として使用される沸騰水型核燃料集合体1にあっては、
図12の如くウォータチャンネル角管3cの前後側面に
あって、スぺーサ4を挟んだ上下位置に計4個のタブ3
eを、抵抗溶接法により溶着するようにしている。この
ことはスぺーサ4が、上下方向へ移動してしまうことな
く定位置に維持されるようにするためであり、因にスぺ
ーサ4は7個用いられるから、全部で4×7=28個の
タブ3eを溶接しなければならないのであり、同図12
にあって4aは、スぺーサ4に設けられた内側枠板を示
し、ここに挿入されることで、既知の如くウォータチャ
ンネル3は弾持による拘束状態となる。
2. Description of the Related Art As one example, the state of use of a core of a boiling water nuclear fuel assembly 1 as shown in FIG. 10 will be described. As is known, the boiling water nuclear fuel assembly 1 has an upper tie plate 1a. A large number of fuel rods 2 and water channels 3 are held between the lower tie plate 1b and a plurality of required spacers 4 in a support-restricted state. The above-mentioned water channel 3 is shown in FIG. The upper end plug 3a, the connecting member 3b, the water channel square tube 3c, and the lower end plug 3d are sequentially welded from the upper side,
These weldings are TIG spot welding, laser welding, E.
There is no problem because B welding is used, but in the case of the boiling water nuclear fuel assembly 1 used for high burnup,
As shown in FIG. 12, a total of four tabs 3 are provided on the front and rear side surfaces of the water channel square tube 3c and at the upper and lower positions with the spacer 4 interposed therebetween.
e is welded by a resistance welding method. This is to maintain the spacer 4 at a fixed position without moving in the vertical direction. Because seven spacers 4 are used, a total of 4 × 7 = It is necessary to weld 28 tabs 3e, as shown in FIG.
Numeral 4a denotes an inner frame plate provided on the spacer 4, and when inserted therein, the water channel 3 is brought into a restrained state by elasticity as known.

【0003】そして、上記の如き抵抗溶接法を実施しよ
うとするときは、タブ3eを比較的薄肉のウォータチャ
ンネル角管3cの側面に対し、接触加圧抵抗を高めるた
め、加圧電極により加圧を与えると共に、電気抵抗密度
も上昇させる必要があり、この結果被溶接物である溶着
部分に対し短時間内に加圧、通電、昇温、降温の条件が
付与され、これにより、被溶接物であるウォータチャン
ネル角管3cに対して溶融、軟化、熱影響等の物理的現
象が生じて、ウォータチャンネル角管3cに変形、そし
て歪が生じ易いこととなる。
When the resistance welding method as described above is to be carried out, the tab 3e is pressed against the side of the relatively thin water channel square tube 3c by a pressing electrode in order to increase the contact pressing resistance. And the electric resistance density must be increased. As a result, the conditions of pressurization, energization, temperature rise, and temperature decrease are given to the welded portion to be welded within a short time. Physical phenomena such as melting, softening, and thermal effects occur in the water channel square tube 3c, and the water channel square tube 3c is likely to be deformed and distorted.

【0004】そこで、上記のような事例に対応するた
め、既にタブ3eの溶着箇所にあって、前記の如きウォ
ータチャンネル角管3cの変形や歪が生じないように、
当該ウォータチャンネル角管3c内に、中子を挿入する
ことが実施されている。しかし、上記従来の中子にあっ
ては、単にウォータチャンネル角管3cよりも、僅かに
細成とした中子を挿入するようにしているだけであるか
ら、当該挿入操作を円滑に行い得るようにしようとすれ
ば、どうしても不可避的に中子と、ウォータチャンネル
角管3cとの間に隙間が生ずることになり、従って、前
記の如き抵抗溶接時にあって、ウォータチャンネル角管
3cの薄肉に変形を生ずることになる。
Therefore, in order to cope with the above-mentioned case, the water channel square tube 3c is not deformed or distorted at the welding position of the tab 3e as described above.
A core is inserted into the water channel square tube 3c. However, in the above-mentioned conventional core, since the core that is slightly thinner than the water channel square tube 3c is merely inserted, the insertion operation can be performed smoothly. Inevitably, a gap is inevitably formed between the core and the water channel square tube 3c. Therefore, at the time of resistance welding as described above, the water channel square tube 3c is deformed into a thin wall. Will occur.

【0005】この結果、上記の中子を当該抵抗溶接後
に、ウォータチャンネル角管3cから抜き去るときに
は、上記の溶接後にあって加圧溶接部は抵抗加圧発熱に
よる軟化部分が、ウォータチャンネル角管3cの内面側
に隆出してしまうことになるから、中子との隙間がなく
なってしまい、この結果、当該中子の取り外しが困難と
なってしまうのであり、このことは上記従来の中子の場
合、回避困難な欠陥とされている。
As a result, when the core is removed from the water channel square tube 3c after the resistance welding, the pressure welded portion after the above welding has a softened portion due to resistance pressure heat generation, 3c, it protrudes to the inner surface side, so that there is no gap between the core and the core. As a result, it becomes difficult to remove the core. In this case, it is a defect that is difficult to avoid.

【0006】そこで、上記の問題点を解消するため、中
子とウォータチャンネル角管3cとの間隙を小さくし、
かつ、均一な寸法となるよう調整することも考えられる
が、そのためには、ウォータチャンネル角管3cの内周
壁面の寸法精度を上げ、中子寸法についても小さな間隙
とし、かつその間隙寸法を均一にするため高精度を要求
されることから、製作コスト上これを実現することは経
済的に極めて難事となる。
Therefore, in order to solve the above problem, the gap between the core and the water channel square tube 3c is reduced,
In addition, it is conceivable to adjust the dimensions so as to be uniform. However, for this purpose, the dimensional accuracy of the inner peripheral wall surface of the water channel square tube 3c is increased, the core dimension is set to a small gap, and the gap dimension is uniform. Since high precision is required to achieve this, it is extremely economically difficult to achieve this in terms of manufacturing costs.

【0007】さらに、重要なことは従来の中子の場合、
単に所定長に形成した中子を、可成り長い筒状体に内挿
して、その所要複数箇所にあって、溶接を行うようにす
るといった際、所定箇所における溶接作業が完了した
後、順次当該中子を移送してから、当該順次必要数箇所
における各溶接作業を実施しなければならないことにな
り、このため、溶接作業効率を向上するといったこと
は、実質的に不可能となっている。
[0007] Furthermore, what is important is that in the case of a conventional core,
The core formed simply to a predetermined length is inserted into a considerably long cylindrical body, and it is necessary to perform welding at a plurality of required places. After transferring the core, each welding operation must be sequentially performed at the required number of places, and it is substantially impossible to improve the welding operation efficiency.

【0008】[0008]

【発明が解決しようとする課題】本発明は上記従来の中
子が有する欠陥に鑑み検討された筒状体の加圧変形防止
用拡縮中子装置に関し、請求項1にあっては単に従来中
子のように、その外形寸法が不変であるものを用いるの
ではなく、中子の外形寸法を所定の操作によって拡張し
たり、必要に応じて自由に縮径状態にもなし得るように
する発想に基づいている。すなわち、ウォータチャンネ
ル角管などの筒状体に遊嵌状態にて内装した後、拡縮用
牽引動力源を稼動することで拡縮用パワーロッドを牽引
すると、これに付設の拡縮用押動子が、一対の拡縮用円
錐体の中、その一方を押動させ、このことで、当該拡縮
用円錐体が、拡縮用スリットの切り込み方向を交互に逆
転して適切に穿設された拡縮中子本体の円錐状孔に押し
込まれ、これにより、当該拡縮中子本体が均一な拡張状
態となり、この結果筒状体の内周壁面に、しっかりと拡
縮中子本体の外周壁面を均等に押当させ得るようにして
いる。
SUMMARY OF THE INVENTION The present invention relates to an expansion / contraction core device for preventing a cylindrical body from being deformed under pressure, which has been studied in view of the defects of the conventional core. The idea is that instead of using a core whose outer dimensions are invariable, such as a core, the outer dimensions of the core can be expanded by a predetermined operation and the diameter can be freely reduced as necessary. Based on That is, after the interior of the tubular body such as a water channel square tube in a loosely fitted state, when the expansion and contraction power rod is pulled by operating the expansion and contraction traction power source, the expansion and contraction pusher attached thereto is One of the pair of expansion / contraction cones is pushed, whereby the expansion / contraction cones alternately reverse the cutting directions of the expansion / contraction slits.
It is pushed into the conical hole of the expanding / reducing core body that is appropriately drilled , whereby the expanding / reducing core body is uniformly expanded, and as a result, the inner peripheral wall surface of the cylindrical body is firmly expanded / reduced. The outer peripheral wall surface of the core body can be pressed evenly .

【0009】このようにして、上記請求項1では拡縮中
子本体を簡易に筒状体内に挿入でき、その後における拡
縮用牽引動力源の稼動で、拡縮中子本体と筒状体との間
隙をなくしてしまい、このことで抵抗溶接とか成形加工
などによる外部からの圧力に対して、筒状体がどの箇所
においても充分耐え得る拡張保持力を付与可能とし、ウ
ォータチャンネル角管とか鋼管などに変形や歪を与える
ことなく、効率のよい抵抗溶接や成形加工を行い得るよ
うにし、さらに、上記拡縮用牽引動力源の牽引を解除す
るだけで、拡縮中子本体がそれ自体の復原力によって収
縮し、このことで使用後に筒状体から抜き取る作業を
も、容易に行い得るようにするのが、その目的である。
In this way, according to the first aspect of the present invention, the expansion / contraction core body can be easily inserted into the cylindrical body, and the gap between the expansion / contraction core body and the cylindrical body can be formed by operating the expansion / contraction traction power source thereafter. lost my, for the external pressure due to the resistance welding Toka molding with this, the tubular body which part
In this way, it is possible to provide an expansion holding force that can withstand sufficient pressure, and to perform efficient resistance welding and forming without giving deformation or distortion to a water channel square pipe or a steel pipe. By simply releasing the traction of the source, the expansion / contraction core body contracts due to its own restoring force, so that it can be easily removed from the cylindrical body after use. is there.

【0010】次に、請求項2にあっては、請求項1にお
ける拡縮用牽引動力源と、拡縮用円錐体との連結部によ
る連設を適切な構成によって実現させることで、請求項
1につき前記の拡縮作動を確実に行い得るようにし、さ
らに、前記拡縮用パワーロッドに付された拡縮用押動子
をストローク調整ナットにより形成することで、当該拡
縮用押動子の拡縮用パワーロッドに対する位置を調整自
在となし、このことによって、拡縮用牽引動力源の牽引
ストロークを調整することで、拡縮中子本体の拡張度合
をも加減し、各種寸法の筒状体に整合し得るようにして
いる。
Next, according to the second aspect of the present invention, the connection between the expansion / contraction traction power source and the expansion / contraction conical body in the first aspect is realized by an appropriate configuration. The enlarging / reducing operation can be performed reliably, and furthermore, the enlarging / reducing push rod attached to the expanding / reducing power rod is formed by a stroke adjusting nut, so that the enlarging / reducing push rod with respect to the By adjusting the position of the expansion / contraction traction power source, the degree of expansion of the expansion / contraction core body can be adjusted to match the cylindrical body of various dimensions. I have.

【0011】さらに、請求項3の場合には請求項1およ
び請求項2のごとく、拡縮自在である拡縮中子本体を、
一個だけ筒状体の適所に内装配置するのでなく、当該拡
縮中子本体を所要数だけ適切に連装させるよう構成し、
一本の拡縮用パワーロッドを一つの拡縮用牽引動力源に
より前記の通り牽引することによって、一度に連装され
た全拡縮中子本体を拡張状態とすることができるように
し、このことによって、抵抗溶接や成形加工を、順次容
易かつ迅速になし得るようにするのが、その目的であ
る。
Further, in the case of claim 3, as in claims 1 and 2, the expandable and contractible core body is
Instead of arranging only one piece inside the appropriate place of the tubular body, the expansion and contraction core body is configured to be appropriately connected in a required number,
By pulling one expansion / contraction power rod by one expansion / contraction traction power source as described above, it is possible to bring all the expansion / contraction core bodies connected at one time into the expanded state. It is an object of the present invention to enable welding and forming to be sequentially and easily and quickly performed.

【0012】[0012]

【課題を解決するための手段】本発明は、上記の目的を
達成するため、請求項1では筒状体の内周壁面に、略均
等な間隙をもって遊嵌自在である外周壁面が形成され、
当該外周壁面から軸心貫通洞まで達して、切込口と切込
閉端とが逆向配置となるよう軸心方向へ所望複数条だけ
全周面にわたって拡縮用スリットが穿設され、上記軸心
貫通洞が軸心方向中央部の貫通孔と、軸心方向両端部か
ら上記の貫通孔まで次第に径小となるよう穿設された各
円錐状孔とにより形成されている拡縮中子本体と、当該
拡縮中子本体の各円錐状孔に嵌合されると共に軸心通孔
が穿設されている各拡縮用円錐体と、当該両軸心通孔と
前記貫通孔とに貫挿した拡縮用パワーロッドと、一方で
ある拡縮用円錐体の外側端部に連結部によって連設さ
れ、上記拡縮用パワーロッドの一端と連結された拡縮用
牽引動力源と、当該拡縮用牽引動力源の稼動により牽引
される上記拡縮用パワーロッドの他端に設けられ、当該
牽引により他方である拡縮用円錐体の外側端部を押動し
て、当該拡縮用円錐体を他方の拡縮用円錐体側へ移動す
ることで、前記拡縮用中子本体を拡縮自在なるよう拡張
し、これにより当該拡縮用中子本体の外周壁面を、前記
の筒状体における内周壁面に押当自在とした拡縮用押動
子とからなることを特徴とする筒状体の加圧変形防止用
拡縮中子装置を提供しようとするものである。
In order to achieve the above object, according to the present invention, an outer peripheral wall which can be freely fitted with a substantially uniform gap is formed on an inner peripheral wall of a cylindrical body.
A plurality of slits for expansion and contraction are formed in the axial direction so as to extend from the outer peripheral wall surface to the axial center through cavity, and a desired plurality of slits are formed in the axial direction so that the cutout and the cut closed end are arranged in opposite directions. A through-hole at the central portion in the axial direction of the through-cavity, and an expanding / contracting core body formed by each conical hole pierced so as to gradually decrease in diameter from both ends in the axial direction to the through-hole, Each expansion / contraction cone fitted into each conical hole of the expansion / contraction core main body and having an axial through hole, and an expansion / contraction member inserted through both the axial through holes and the through hole. The power rod and the expansion / contraction traction power source connected to the outer end of one of the expansion / contraction cones by a connecting portion, and connected to one end of the expansion / contraction power rod, and the operation of the expansion / contraction traction power source It is provided at the other end of the expanding / contracting power rod to be pulled, and the other end is provided by the towing. By pushing the outer end of the expansion / contraction cone and moving the expansion / contraction cone toward the other expansion / contraction cone, the expansion / contraction core body is expanded so as to be freely expandable / contractible. An expansion / contraction core device for preventing pressurized deformation of a cylindrical body, comprising an expansion / contraction pusher that allows an outer peripheral wall surface of the main body to be pressed against an inner peripheral wall surface of the cylindrical body. It is intended to provide.

【0013】さらに、請求項2にあっては、請求項1に
おける筒状体の加圧変形防止用拡縮中子装置にあって、
一方である拡縮用円錐体と拡縮用牽引動力源とを連設す
る連結部が、拡縮用牽引動力源を取着する取付用プレー
トと、この取付用プレートを上記拡縮用円錐体の外側端
部に刻設された複数の各螺孔に、当該取付用プレートの
取付孔から挿通して螺着する取付ボルトと、この取付ボ
ルトに被嵌されて上記取付用プレートと上記一方の拡縮
用円錐体における外側端部との間に介装固定される連結
用カラとからなり、上記の拡縮用牽引動力源が空気圧ま
たは油圧のシリンダにより形成され、拡縮用パワーロッ
ドに設けられた拡縮用押動子が、当該拡縮用パワーロッ
ドの他端に刻設した螺部に螺嵌された拡縮用牽引動力源
による牽引ストロークを調整自在としたストローク調整
ナットにより形成されていることを、その内容としてい
る。
Further, according to a second aspect of the present invention, there is provided an expansion / contraction core device for preventing a cylindrical body from being deformed under pressure according to the first aspect,
On the other hand, a connecting portion connecting the expansion / contraction cone and the expansion / contraction traction power source is provided with a mounting plate for attaching the expansion / contraction traction power source, and the mounting plate is connected to an outer end of the expansion / contraction traction body. in each of a plurality of threaded holes engraved into a mounting bolt screwed is inserted from the mounting hole of the mounting plate, fitted has been said mounting plate and said one scaling of this mounting bolt
A connection collar interposed and fixed between the outer end of the power cone and the power source, the power source for expansion and contraction being formed by a pneumatic or hydraulic cylinder, and a power source for expansion and contraction provided on a power rod for expansion and contraction. That the pusher is formed by a stroke adjusting nut capable of adjusting a traction stroke by a traction power source for expansion and contraction screwed into a screw portion engraved at the other end of the power rod for expansion and contraction. And

【0014】そして、請求項3の場合には、筒状体の内
周壁面に、略均等な間隙をもって遊嵌自在である外周壁
面が形成され、当該外周壁面から軸心貫通洞まで達し
て、切込口と切込閉端とが逆向配置となるよう軸心方向
へ所望複数条だけ全周面にわたって拡縮用スリットが穿
設され、上記軸心貫通洞が軸心方向中央部の貫通孔と、
軸心方向両端部から上記の貫通孔まで次第に径小となる
よう穿設された各円錐状孔とにより形成されている拡縮
中子本体と、当該拡縮中子本体の各円錐状孔に嵌合され
ると共に軸心通孔が穿設されている各拡縮用円錐体とに
より拡縮中子構成単体を組成し、当該拡縮中子構成単体
を所要数個だけ同一軸線上に配装して、各拡縮中子構成
単体の各軸心通孔と前記貫通孔とに拡縮用パワーロッド
を貫挿し、一方端である拡縮中子構成単体の一方である
拡縮用円錐体における外側端部に、上記拡縮用パワーロ
ッドの一端が連結された拡縮用牽引動力源を連結部によ
って連設すると共に、これら各拡縮中子構成単体間に
は、相対する拡縮用円錐体の各外側端部を、所望の離間
距離をもって相間連結部により連設し、前記拡縮用牽引
動力源の稼動により牽引される上記拡縮用パワーロッド
の最終端である拡縮中子構成単体から延出する端部に拡
縮用押動子を設けて、当該牽引により当該拡縮用押動子
が、上記拡縮中子構成単体の終端側である拡縮用円錐体
の外側端部を押動して、当該拡縮用円錐体を他方の拡縮
用円錐体側へ移動させ、これにより、残余の全拡縮中子
構成単体における終端側の拡縮用円錐体も連動して、各
拡縮用中子本体が拡縮自在なるよう拡張され、これら各
拡縮用中子本体の外周壁面が、前記の筒状体における内
周壁面の所望複数箇所に押当自在であることを特徴とす
る筒状体の加圧変形防止用拡縮中子装置を提供しようと
している。
In the case of the third aspect, an outer peripheral wall surface which can be freely fitted with a substantially uniform gap is formed on the inner peripheral wall surface of the cylindrical body, and extends from the outer peripheral wall surface to the axial through hole. Enlargement / reduction slits are drilled in the axial direction over the entire peripheral surface by a desired number of slits so that the cut end and the cut closed end are arranged in the opposite direction, and the axial through hole is provided with a through hole at the axial center portion. ,
The expanding and contracting core body formed by each conical hole formed so as to gradually decrease in diameter from both ends in the axial direction to the above-mentioned through hole, and fitted into each conical hole of the expanding and contracting core body. Each of the expansion / contraction core components is formed by each of the expansion / contraction cones having an axial through hole formed therein, and a required number of the expansion / contraction core components alone are arranged on the same axis. An expansion / contraction power rod is inserted into each of the axial through holes and the through hole of the expansion / contraction core component, and the expansion / contraction is performed at an outer end of the expansion / contraction cone, which is one of the expansion / contraction core components. The power rod for power expansion and contraction is connected by a connecting portion, and the outer ends of the conical expansion and contraction members are separated by a desired distance between the respective core components. It is connected by an interphase connection with a distance, and by the operation of the traction power source for expansion and contraction, An expansion / contraction pusher is provided at an end extending from the expansion / contraction core structure alone, which is the final end of the expansion / contraction power rod to be pulled, and the traction causes the expansion / contraction pusher to become the expansion / contraction core configuration. The outer end of the expansion / contraction cone, which is the end side of the single body, is pushed to move the expansion / contraction cone toward the other expansion / contraction body. The expansion / contraction cones are also linked, and each expansion / contraction core body is expanded so as to be freely expandable / contractible, and the outer peripheral wall surface of each of the expansion / contraction core bodies is provided at a plurality of desired locations on the inner peripheral wall surface of the cylindrical body. It is an object of the present invention to provide an expansion / contraction core device for preventing a cylindrical body from being deformed under pressure, which is capable of being pressed freely.

【0015】[0015]

【発明の実施の形態】先ず請求項1の発明につき図1な
いし図4によって詳記すると、図1はスぺーサ4に挿通
されたウォータチャンネル角管3cとしての筒状体5
を、基台6上に横倒しの状態にて載置し、これに対し
本発明に係る加圧変形防止用拡縮中子装置を使用した状
態が示されており、その主要構成部材なるものは、拡縮
中子本体10、拡縮用円錐体11A、11B、拡縮用パ
ワーロッド12、連結部13、拡縮用牽引動力源14、
そして拡縮用押動子15である。
When MODE FOR CARRYING OUT THE INVENTION First per the invention of claim 1 by 1 to 4 for more serial, inserted in Figure 1 scan pacer 4
Tubular member 5 as a water channel angle pipe 3c which is
A, it is placed on the base 6 at its side of the state, in contrast
The state using the expansion / contraction core device for preventing pressure deformation according to the present invention
State is shown, what its made main components, scaling core body 10, scaled for cone 11A, 11B, scaling a power rod 12, connecting portion 13, scaling for traction power source 14,
And it is a pusher 15 for expansion and contraction.

【0016】先ず第1の拡縮中子本体10につき説示す
ると、図1と図2に明示されている通り、筒状体5の内
周壁面5aによる形状に対応して、四角形とか円形の端
面形状をもち、当該筒状体5に内周壁面5aから略均等
な間隙gだけ離間して遊嵌自在な寸法の外周壁面10a
が形成されている。そして、重要なことは当該拡縮中子
本体10が拡張状態となったり、収縮状態に復帰するこ
とができるように、拡縮用スリット10bが所望複数条
だけ全周にわたって軸線方向に沿い、しかも、外周壁面
10aから軸心貫通洞10cに達するまで穿設されてい
ることである。
First, the first expanding / contracting core body 10 will be described. As clearly shown in FIGS. 1 and 2, a square or circular end face shape corresponding to the shape of the inner peripheral wall surface 5a of the cylindrical body 5 is shown. And an outer peripheral wall 10a having a dimension that allows it to be freely fitted on the cylindrical body 5 by being separated from the inner peripheral wall 5a by a substantially uniform gap g.
Are formed. It is important that the expansion / contraction slits 10b extend in the axial direction over the entire circumference by a desired number of lines so that the expansion / contraction core body 10 can be expanded or returned to the contracted state. That is, the hole is formed so as to reach from the wall surface 10a to the axial through hole 10c.

【0017】しかも、上記拡縮用スリット10bは、そ
の切込口10dと切込閉端10eとが、図2(A)によ
り明示されている通り、互いに逆向配置となるようにし
てあり、図示例にあっては四角形である外周壁面10a
の各四辺面に夫々三条の拡縮用スリット10bが、交互
に、その切込口10dと切込閉端10eとを反対配置と
して穿設するようにしてあるから、図2(B)の通り拡
縮中子本体10端面にあっては、拡縮用スリット10b
が十字状の配置となっている。
Further, the slit 10b for enlargement and contraction is configured such that the cutout 10d and the cutout closed end 10e are arranged to be opposite to each other as clearly shown in FIG. 2A. The outer peripheral wall surface 10a which is rectangular
Since the three slits 10b for expansion and contraction are alternately formed in the four sides of each of the four sides with the cutout 10d and the cutout closed end 10e arranged in the opposite arrangement, as shown in FIG. In the end face of the core body 10, a slit 10b for expansion and contraction
Has a cross-shaped arrangement.

【0018】前記軸心貫通洞10cは、軸心方向中央部
における貫通孔10fと、軸心方向両端部から上記の貫
通孔10fまで、次第に径小となるように穿設された一
対の円錐状孔10g、10hとにより形成されており、
当該円錐状孔10g、10hに夫々前掲拡縮用円錐体1
1A、11Bが嵌合されており、これには図1(A)と
図3により理解される如く、軸心通孔11a、11bが
貫設されていると共に、拡縮用円錐体11Aの外側端部
11cには、図示例の場合4個の螺孔11eが刻設され
ている。
The axial through hole 10c has a through hole 10f at a central portion in the axial direction, and a pair of conical holes formed so as to gradually become smaller in diameter from both ends in the axial direction to the through hole 10f. Holes 10g and 10h,
The cones 1 for expansion and contraction described above are respectively provided in the conical holes 10g and 10h.
1A and 11B are fitted therein, as shown in FIGS. 1 (A) and 3, through which axial through holes 11a and 11b are formed, and the outer end of the expanding / contracting cone 11A. In the illustrated example, four screw holes 11e are engraved in the portion 11c.

【0019】次に、前記拡縮用パワーロッド12は、拡
縮用円錐体11A、11Bの軸心通孔11a、11bお
よび前記拡縮中子本体10の貫通孔10fとに貫挿され
ているのであり、前記の拡縮用牽引動力源14は、一方
である拡縮用円錐体11Aの外側端部11cに対して、
前記の連結部13によって連設されている。ここで、図
示の連結部13なるものは、図1(A)の通り拡縮用牽
引動力源14を外側から、図4(B)に示されている取
付螺孔13aを用いて取着する取付用プレート13b
と、この取付用プレート13bを、前記した拡縮用円錐
体11Aの外側端部11cに刻設した螺孔11eに、図
4(B)の取付用プレート13bにおける取付孔13c
から挿通して螺着した取付ボルト13dと、さらに、こ
の取付ボルト13dに被嵌されて、上記取付用プレート
13bと外側端部11cとの間に介装固定される図4
(C)の連結用カラ13eとから構成されている。
Next, the power rod 12 for expansion and contraction is inserted through the axial through holes 11a and 11b of the cones 11A and 11B for expansion and contraction and the through hole 10f of the core body 10 for expansion and contraction. The expansion / contraction traction power source 14 is disposed on the outer end 11c of the expansion / contraction cone 11A.
The connection portion 13 is provided continuously. Here, the connecting portion 13 shown in the figure is an attachment for attaching the expansion / contraction traction power source 14 from the outside as shown in FIG. 1 (A) by using the attachment screw hole 13a shown in FIG. 4 (B). Plate 13b
The mounting plate 13b is attached to the screw hole 11e formed in the outer end 11c of the above-mentioned expansion / contraction cone 11A by the mounting hole 13c in the mounting plate 13b shown in FIG.
FIG. 4 shows a mounting bolt 13d which is inserted and screwed into the mounting bolt 13d, and which is fitted to the mounting bolt 13d and interposed and fixed between the mounting plate 13b and the outer end 11c.
And (C) the connecting collar 13e.

【0020】ここで、上記の拡縮用牽引動力源14とし
ては、空気圧または油圧のシリンダを用いたり、その他
螺旋送り機構や電磁力によ牽引機構などを用いること
ができるが、図示例ではシリンダが用いられており、そ
の牽引軸14aに前記した拡縮用パワーロッド12の一
端側にあって刻設した連結用螺杆部12aが螺着され、
これにより拡縮用牽引動力源14を稼動することで、拡
縮用パワーロッド12が所定の牽引ストロークだけ図1
の左方へ牽引されることになる。
[0020] Here, the scaling for traction power source 14 described above, or using a pneumatic or hydraulic cylinder, or the like can be used traction mechanism other that by the helical feeding mechanism or an electromagnetic force, in the illustrated example the cylinder The connecting screw portion 12a engraved on one end of the power rod 12 for expansion and contraction is screwed to the towing shaft 14a,
By operating the traction power source 14 for expansion and contraction, the power rod 12 for expansion and contraction is moved by a predetermined traction stroke in FIG.
To the left.

【0021】さらに、前掲拡縮用押動子15は、拡縮用
牽引動力源14の稼動により牽引される上記拡縮用パワ
ーロッド12にあって、その他端に設けられており、上
記の牽引によって拡縮用円錐体11Bの外側端部11d
が押動され、これにより、当該拡縮用円錐体11Bを他
方の拡縮用円錐体11A側へ移動することで、前記の拡
縮中子本体10を拡縮自在なるよう拡張し、かくして当
該拡縮中子本体10の外周壁面10aを、筒状体5の内
周壁面5aに押当することができる。
Further, the enlarging / reducing pusher 15 is provided at the other end of the enlarging / reducing power rod 12 which is pulled by the operation of the enlarging / retracting traction power source 14, and is provided for enlarging / reducing by the above-described retraction. Outer end 11d of cone 11B
Is pushed, thereby moving the expansion / contraction cone 11B toward the other expansion / contraction cone 11A, thereby expanding the expansion / contraction core body 10 so as to be freely expandable / contractible, and thus the expansion / contraction core body The outer peripheral wall surface 10 a of the cylindrical body 5 can be pressed against the inner peripheral wall surface 5 a of the cylindrical body 5.

【0022】ここで、上記拡縮用押動子15として図示
されたものは、請求項2として明示の如く単に拡縮用パ
ワーロッド12に固設してしまうものでなく、その他端
に刻設した螺部12bに、ストローク調整ナット15a
を螺回調整可能なるよう螺嵌することで形成してあり、
このようにすることで拡縮用牽引動力源14による牽引
ストロークを調整することができ、適切な牽引ストロー
クを選択することで、拡縮中子本体10の外周壁面10
aを、所望の押圧力となるよう調整することにより筒状
体5の内周壁面5aに押当させることが容易となる。
Here, what is shown as the expansion / contraction pusher 15 is not simply fixed to the expansion / contraction power rod 12 as specified in claim 2 , but a screw engraved on the other end. The stroke adjusting nut 15a is attached to the portion 12b.
Is formed by screw-fitting so that it can be adjusted
In this manner, the traction stroke of the expansion / contraction traction power source 14 can be adjusted. By selecting an appropriate traction stroke, the outer peripheral wall surface 10 of the expansion / contraction core body 10 can be adjusted.
By adjusting “ a” to a desired pressing force, it becomes easy to press the inner peripheral wall surface 5 a of the tubular body 5 .

【0023】ここで、図5に開示した加圧変形防止用拡
縮中子装置は、図1に示したものと別異の請求項1に係
る実施例を示しており、図1にあっては拡縮用牽引動力
源14の比較的近傍に拡縮中子本体10等を配設したの
で、連結部13の取付ボルト13dや連結用カラ13e
は短寸法のものを用いればよいが、図5の場合には、そ
の用法上拡縮用牽引動力源14から可成り離して拡縮中
子本体10等を一式配設する要請に対処しようとしてい
る。このため、図5の実施例では連結部13の取付ボル
トや連結カラに長尺な1本物を使用することなく短尺な
取付ボルトや連結カラ等を所要本だけ用意し、これらを
所要数の中間連結ブロック13fにより、螺着とか溶着
手段にて連設するようにしている。この際取付ボルトを
螺着手段により、前記の取付用プレート13bと中間連
結ブロック13f間、中間連結ブロック13f、13f
間、そして中間連結ブロック13fと前記の拡縮用円錐
体11Aとの間に装着するには、取付ボルトの両端に逆
螺旋部を刻設するようにしてもよい。
Here, the expansion / contraction core device for preventing pressure deformation disclosed in FIG. 5 shows an embodiment according to claim 1 which is different from that shown in FIG. Since the expansion / contraction core body 10 and the like are disposed relatively near the expansion / contraction traction power source 14, the mounting bolt 13d of the connecting portion 13 and the connecting collar 13e are provided.
In the case of FIG. 5, it is intended to cope with a request to dispose the expansion / contraction core body 10 and the like as a set considerably away from the expansion / contraction traction power source 14 due to its usage. For this reason, in the embodiment of FIG. 5, only a required number of short mounting bolts and connecting collars are prepared without using a single long bolt for the mounting bolts and connecting collars of the connecting portion 13, and these are installed in the required number of intermediate parts. The connection block 13f is used to continuously connect the members by screwing or welding means. At this time, the mounting bolts are screwed between the mounting plate 13b and the intermediate connecting block 13f, the intermediate connecting blocks 13f, 13f.
In order to mount between the intermediate connecting block 13f and the expanding and contracting cone 11A, an inverted spiral portion may be engraved at both ends of the mounting bolt.

【0024】次に請求項3に係る加圧変形防止用拡縮中
子装置につき、以下図6と前掲図1とによって詳記する
と、上記図1とか図5に開示のものが、筒状体5の内周
壁面5aにあって、その一箇所だけに拡縮中子本体10
等を配置しており、従って、この筒状体5の当該一箇所
だけで抵抗溶接による前記タブ3eなどの溶着をなし得
るに過ぎないのに対し、当該請求項3の場合には一度、
当該加圧変形防止用拡縮中子装置を筒状体5内に装填す
れば所望複数箇所における抵抗溶接作業等を効率的に実
施できることになる。
Next, the expansion / contraction core device for preventing pressure deformation according to claim 3 will be described in detail with reference to FIG. 6 and FIG. 1 mentioned above. The inner core wall 10a of the inner core 5 has only one portion.
And so on, so that the tab 3e or the like can be welded by resistance welding only at the one location of the cylindrical body 5, whereas in the case of claim 3, once,
By loading the expansion / contraction core device for preventing pressure deformation into the cylindrical body 5, resistance welding work or the like at a plurality of desired locations can be efficiently performed.

【0025】この場合にも基本的構成は請求項1と同じ
であって、図1に開示したと同一構成の拡縮中子本体1
0と、その各円錐状孔10g、10hに嵌合されると共
に軸心通孔11a、11bが穿設されている各拡縮用円
錐体11A、11Bとによって拡縮中子構成単体16な
るものを構成するのである。そして図6の如く当該拡縮
中子構成単体16を、所要数個だけ同一軸線上に配装
し、これら各拡縮中子構成単体16の各軸心通孔11
a、11bと前記した各貫通孔10fとに、拡縮用パワ
ーロッド12を貫挿し、さらに、一方向端にあって配装
された拡縮中子構成単体16の一方である拡縮用円錐体
11Aにおける外側端部11cに、上記拡縮用パワーロ
ッド12の一端が螺着などの手段にて連結されている拡
縮用牽引動力源14を、連結部13によって連設するこ
とは、図1のものと同じである。
Also in this case, the basic structure is the same as that of the first embodiment, and the expansion / contraction core body 1 having the same structure as that disclosed in FIG.
0 and the expansion / contraction cones 11A and 11B fitted in the conical holes 10g and 10h and formed with the axial through-holes 11a and 11b constitute the expansion / contraction core unit 16 alone. You do it. Then, as shown in FIG. 6, a required number of the expanding / contracting core components 16 are arranged on the same axis, and a required number of each
a, 11b and the above-mentioned through-holes 10f, the power rod 12 for expansion and contraction is inserted, and furthermore, the expansion / contraction cone 11A, which is one of the expansion / contraction core components 16 disposed at one end, is provided. Connecting the expansion / contraction traction power source 14 having one end of the power rod 12 for expansion / contraction to the outer end 11c by means such as a screw connection by the connecting portion 13 is the same as that in FIG. It is.

【0026】しかし、当該発明にあっては、これら各拡
縮中子構成単体16相互間には、相隣の相対する拡縮用
円錐体11B、11Aにおける各外側端部11d、11
cを、所望の各離間距離dを保有させて、相間連結部1
7によって連設されているのであり、拡縮用牽引動力源
14の稼動によって、図中左方へ牽引されることとなる
拡縮用パワーロッド12の最終端に位置している拡縮中
子構成単体16から延出の端部にあって、拡縮用押動子
15が設けられている。
However, in the present invention, between the respective expanding / contracting core components 16, the outer end portions 11 d, 11 of the adjacent opposing expanding / contracting cones 11 B, 11 A are provided.
c is held at each desired separation distance d,
7, the expansion / contraction core unit 16 located at the final end of the expansion / contraction power rod 12, which is towed to the left in the drawing by the operation of the expansion / contraction traction power source 14. An extension / retraction pusher 15 is provided at the end extending from the extension.

【0027】従って、当該牽引により上記の拡縮用押動
子15が、上記の拡縮中子構成単体16における終端側
に配された拡縮用円錐体11Bの外側端部11dを押動
し、この結果当該拡縮用円錐体11Bを、他方の拡縮用
円錐体11A側へ移動させると共に、残余の全拡縮中子
構成単体における終端側の各拡縮用円錐体11Bも連動
して、各拡縮中子本体10が拡縮自在なるよう拡張さ
れ、これによって全拡縮中子構成単体16における各拡
縮中子本体10の外周壁面10aが、筒状体5における
内周壁面5aにあって、その所望複数箇所に押当するこ
とになる。
Accordingly, the torsion pusher 15 pushes the outer end 11d of the expansion / contraction cone 11B disposed on the end side of the expansion / contraction core unit 16 by the pulling. The expansion and contraction cone 11B is moved to the other expansion and contraction cone 11A side, and the expansion and contraction cones 11B on the end side of the remaining entire expansion and contraction core structure alone are also linked, so that each of the expansion and contraction core bodies 10 Is expanded so as to be freely expandable and contractible, whereby the outer peripheral wall surface 10a of each expanding / contracting core body 10 in the entire expanding / contracting core structure unit 16 is pressed against a plurality of desired locations on the inner peripheral wall surface 5a of the cylindrical body 5. Will do.

【0028】ここで、上記の相間連結部17としては、
両端に逆螺旋方向の螺合部を刻設した螺杆を用い、これ
を一方向へ螺回することで、相隣の拡縮中子構成単体に
おける拡縮用円錐体11A、11Bの各螺孔11eに上
記螺合部を螺着できるようにしておき、さらに、当該拡
縮中子構成単体16相互間の離間距離dが所定長となっ
たところで、予め上記螺杆部に螺合しておいた図示しな
い締着ナットを外側端部11c、11dに押当して締着
状態とするといった構成にすることもできる。
Here, the above-mentioned inter-phase connecting portion 17 includes:
By using a screw rod in which a screw portion in the reverse spiral direction is engraved at both ends, and this is screwed in one direction, the screw hole 11e of the conical expansion / contraction body 11A, 11B in the adjacent expansion / contraction core component alone is formed. The screwing portion is screwed, and when the separation distance d between the expanding / contracting core components 16 becomes a predetermined length, a not-shown tightening screw (not shown) previously screwed to the screwing rod portion. Clamping nuts are pressed against outer ends 11c and 11d to fasten
A configuration such as a state can also be adopted.

【0029】そこで、上記した本発明に係る加圧変形防
止用拡縮中子装置を用いて、前掲ウォータチャンネル角
管3cに、タブ3eを抵抗溶接法により溶着する場合の
概要につき以下詳記すると、先ず図12によって前説し
た通りウォータチャンネル3におけるウォータチャンネ
ル角管3cに、所要複数のスぺーサ4を被嵌して所定位
置に仮決めし、これを横倒し状態として図7に示す抵抗
溶接装置20にあって、その固定用長尺架台21におけ
るガイドブロック21a上に立設した所要複数のセット
治具21b上にあって、ウォータチャンネル角管3cを
載装固定する。ここで図示の抵抗溶接装置20には、上
記ガイドブロック21aの幅員方向両側にガイドレール
21cが設けられており、これに門型移動架台22が係
装されて、固定用長尺架台21の長尺方向に走行自在に
して、所望位置にて固定し得るようになっている。
Therefore, the outline of the case where the tab 3e is welded to the water channel square tube 3c by the resistance welding method using the above-described expansion / contraction core device for preventing pressure deformation according to the present invention will be described in detail below. First, as previously described with reference to FIG. 12, a plurality of required spacers 4 are fitted to the water channel square tube 3c of the water channel 3 to temporarily determine them at predetermined positions. The water channel square tube 3c is mounted and fixed on a plurality of required set jigs 21b erected on the guide block 21a of the fixing long frame 21. Here, in the resistance welding apparatus 20 shown in the drawing, guide rails 21c are provided on both sides in the width direction of the guide block 21a, and a portal-type movable base 22 is engaged with the guide rails 21c. It can run freely in the scale direction and can be fixed at a desired position.

【0030】さらに、図7(A)の右側に固装されてい
るのが、上記の門型移動架台22で、これには電気的制
御部22aが設けられており、これと電気的に結線され
ている以下の部材も、当該門型移動架台22に付設され
ている。すなわち、当該付設部材としては、22bがケ
ーブルベアで、さらに、抵抗溶接のために供される抵抗
溶接用加圧シリンダ22cと、これにより進退自在であ
る加圧電極22d、そして、これに対応して設けられて
いる加圧用油圧ユニット22eが、上記抵抗溶接用加圧
シリンダ22cと対向して装設され、図中22fは、抵
抗溶接のために用いられるブースターケーブル、そし
て、22kは溶接電源を示している。
Further, fixed on the right side of FIG. 7A is the above-mentioned portal-type movable gantry 22, which is provided with an electric control section 22a, and is electrically connected thereto. The following members are also attached to the portal-type movable gantry 22. That is, as the attached member, 22b is a cable bear, furthermore, a resistance welding pressurizing cylinder 22c provided for resistance welding, and a pressurizing electrode 22d which can be advanced and retracted by this, and corresponding to this. A pressurizing hydraulic unit 22e provided is provided so as to face the resistance welding pressurizing cylinder 22c. In the drawing, 22f is a booster cable used for resistance welding, and 22k is a welding power source. Is shown.

【0031】そして、上記の抵抗溶接用加圧シリンダ2
2cと、これに対向する位置に設けられている加圧用油
圧ユニット22eとの間にあって、前記筒状体5として
のウォータチャンネル角管3cを挟装状態として、後述
するようにタブ3eを、当該ウォータチャンネル角管3
cの側面に溶接することになるのであるが、この際、図
示されてはいないけれど、図7の(B)における紙面奥
側にあって、加圧電極と加圧用油圧ユニットを、逆配置
にてもう一組配設しておくようにすれば、タブ3eを一
度に、ウォータチャンネル角管3cの表裏側面に、図9
のようにして溶接することもできる。
Then, the pressure cylinder 2 for resistance welding is used.
And 2c, there between the pressurizing hydraulic unit 22e which is provided at a position opposed thereto, a water channel angle pipe 3c as the tubular member 5 as a sandwiched state, the tab 3e, as will be described later, the Water channel square tube 3
In this case, although not shown, the pressure electrode and the pressure hydraulic unit are arranged in a reverse position on the back side of the drawing in FIG. 7B, although not shown. If another set is provided, the tabs 3e are simultaneously placed on the front and back sides of the water channel square tube 3c as shown in FIG.
It can also be welded as follows.

【0032】このような抵抗溶接装置20を用いること
で、タブ3eを溶接しようとする場合、まず、ウォータ
チャンネル角管3cとしての筒状体5内に、図1、図
5、図6の如き加圧変形防止用拡縮中子装置を、その拡
縮用押動子15側から挿入して行き、その拡縮中子本体
10等を、タブ3eの溶接すべき箇所まで進入させるの
であり、図示例ではスぺーサ4の図1(A)にあって、
左右両側にわたり拡縮中子本体10が配置されるように
し、この際、もちろん拡縮中子本体10の外周壁面10
aと、筒状体5の内周壁面5aとの間には、適度の均一
なる間隙gが形成され、従って、上記の進入操作は極め
て容易かつ迅速に実施することができる。
When the tab 3e is to be welded by using such a resistance welding apparatus 20, first, as shown in FIGS. 1, 5, and 6, the tubular body 5 as the water channel square tube 3c is provided. The expansion / contraction core device for preventing pressurized deformation is inserted from the expansion / contraction pusher 15 side, and the expansion / contraction core main body 10 or the like is advanced to a position where the tab 3e is to be welded. In FIG. 1 (A) of spacer 4,
The expansion / contraction core body 10 is arranged on both the left and right sides.
A moderate gap g is formed between the inner peripheral wall 5a of the cylindrical body 5 and the inner peripheral wall 5a, so that the above-mentioned approach operation can be performed extremely easily and quickly.

【0033】この状態にあって拡縮用牽引動力源14を
稼動すれば、前説の如く拡縮用パワーロッド12の牽引
により、拡縮用押動子15が拡縮用円錐体11Bを押動
して、これが円錐状孔10hに進入することで、多数の
拡縮用スリット10bを穿設されている拡縮中子本体1
均一に拡張し、その外周壁面10aが筒状体5内に
あって、その内周壁面5aを押圧して密着する。この
際、当該密着に基づく筒状体5に対する拡張保持力を充
分に大きくするためには、拡縮用円錐体11A、11B
のテーパ角度と、前記の拡縮用牽引動力源14にシリン
ダを用いたときは、当該シリンダの径およびシリンダ動
作圧力(流体圧力)等につき充分配慮すべきである。
In this state, when the expansion / retraction traction power source 14 is operated, the expansion / retraction pusher 15 pushes the expansion / contraction cone 11B by the pulling of the expansion / contraction power rod 12 as described above. The expansion / contraction core body 1 having a large number of expansion / reduction slits 10b formed by entering the conical hole 10h.
0 is uniformly expanded , and its outer peripheral wall surface 10a is in the cylindrical body 5, and presses and adheres to its inner peripheral wall surface 5a. At this time, in order to sufficiently increase the expansion holding force with respect to the cylindrical body 5 based on the close contact, the expansion / contraction cones 11A, 11B are required.
When a cylinder is used as the expansion / contraction traction power source 14, the diameter of the cylinder and the cylinder operating pressure (fluid pressure) must be sufficiently considered.

【0034】このような状態において、筒状体5の所要
箇所にタブ3eを抵抗溶接法により溶着する場合には、
拡縮中子本体10につき、これをクロム銅合金により形
成すべきであり、このことは、抵抗溶接に際して拡縮中
子本体10が、前記の加圧電極22dに対する他の電極
として用いられることから、当該加圧電極22dと同じ
抵抗溶接電極材の使用が、最も望ましいことに起因して
いる。そして、タブ3eを溶接するには、図8に示す如
く前記抵抗溶接用加圧シリンダ22cのシリンダ軸22
gに固設され、ブースターケーブル22fが接続されて
いる加圧電極22dの先端部に、タブセット溝22hを
形成し、これにタブ3eを嵌合した後、タブ仮止め螺子
22iの締着により当該タブ3eを固定し、これを筒状
体5の所要表面に抵抗溶接用加圧シリンダ22cにより
押当するのであり、図8にあって22jは加圧電極22
dの締着用スリットを示している。
In such a state, when the tab 3e is welded to a required portion of the cylindrical body 5 by a resistance welding method,
The expansion / contraction core body 10 should be formed of a chromium copper alloy. This is because the expansion / contraction core body 10 is used as another electrode for the pressure electrode 22d during resistance welding. The use of the same resistance welding electrode material as the pressing electrode 22d results from the most desirable. Then, to weld the tab 3e, as shown in FIG. 8, the cylinder shaft 22 of the pressure cylinder 22c for resistance welding is used.
g, a tab set groove 22h is formed at the tip end of the pressurizing electrode 22d to which the booster cable 22f is connected, and after the tab 3e is fitted into the groove, a tab temporary fixing screw 22i is tightened. The tab 3e is fixed, and the tab 3e is pressed against a required surface of the tubular body 5 by a resistance welding pressure cylinder 22c. In FIG.
d shows a fastening slit.

【0035】上記の如き操作は、もちろん、それに先立
って前記の門型移動架台22を、固定用長尺架台21の
ガイドレールに沿って所望箇所まで移動させてから行う
ことになるが、この際上記加圧電極22dが押当する筒
状体5の反対側にあって、前記の加圧用油圧ユニット2
2eを図9のように押当させることで、加圧電極22d
による押圧力を受けるようにするのである。そして、図
9の如く加圧電極22dと加圧用油圧ユニット22e
を、前記の如く筒状体5に対して逆配置となるよう2組
設置しておけば両側表面のタブ3eを同時に溶接するこ
とができ、筒状体5は大きな圧力を受けても拡縮中子本
体10の密着により、これが加圧荷重耐受ブロックとし
ての役割を果たす。このため筒状体5は加熱状態となっ
ても変形や歪みを生ずることなく、ブースターケーブル
22fからの電流が、筒状体5−タブ3e−拡縮中子本
体10のように流れて、抵抗溶接を健全に実行すること
ができる。
The above-mentioned operation is of course performed before moving the gate-type movable gantry 22 to a desired position along the guide rail of the long gantry 21 for fixing. The pressurizing hydraulic unit 2 is located on the opposite side of the tubular body 5 against which the pressurizing electrode 22d presses.
2e is pressed as shown in FIG.
To receive the pressing force. Then, as shown in FIG. 9, the pressurizing electrode 22d and the pressurizing hydraulic unit 22e
If two sets of the tabs 3e are installed in such a manner that the tabs 3e are oppositely arranged with respect to the cylindrical body 5 as described above, the tabs 3e on both side surfaces can be welded at the same time, and the cylindrical body 5 expands and contracts even when receiving a large pressure. Due to the close contact of the child main body 10, this plays a role as a pressure load-resistant block. Therefore, even if the tubular body 5 is in a heated state, the current from the booster cable 22f flows like the tubular body 5-tab 3e-expandable core body 10 without deformation or distortion, and resistance welding is performed. Can be executed soundly.

【0036】[0036]

【発明の効果】本発明は以上のように構成されているの
で、請求項1によるときは、筒状体に挿入後、拡縮用牽
引動力源を稼動するだけで、拡縮用円錐体を、拡縮用パ
ワーロッドとこれに設けた拡縮用押動子によって、拡縮
中子本体における円錐状孔内にて移動させ得るよう構成
したので、このことで拡縮用スリットを穿設した拡縮中
子本体を拡張できるようになり、簡易かつ迅速な作業
で、しかも筒状体に拡縮中子本体を強力に密着内嵌させ
得るから、筒状体に抵抗溶接法で所要部材を溶着した
り、筒状体を成形加工しても、筒状体に不本意な変形や
歪みを与えることなく、望ましい溶接、成形を行うこと
ができる。
Since the present invention is constructed as described above, according to the first aspect, the expansion / contraction cone is expanded / reduced only by operating the expansion / contraction traction power source after insertion into the cylindrical body. Power rod and the expansion and contraction pusher provided on the expansion and contraction core body can be moved within the conical hole of the expansion and contraction core body, so that the expansion and contraction core body with the slit for expansion and contraction is expanded. It is possible to easily and quickly fit the expansion / contraction core body into the tubular body by simple and quick work, so that the required members can be welded to the tubular body by resistance welding, Desirable welding and forming can be performed without giving undesired deformation and distortion to the cylindrical body even when forming.

【0037】しかも、溶接や成形加工の完了後にあって
は、前記の拡縮用牽引動力源の稼動を停止すれば、拡縮
中子本体は、それ自体の復原力により収縮状態となるか
ら、従来の如く筒状体の変形により、当該筒状体から抜
き去ることができなかったり、筒状体を損傷することな
く、簡易、迅速に拡縮中子本体の除去作業を行うことが
できる。
Further, after the completion of welding and forming, if the operation of the above-mentioned expansion / contraction traction power source is stopped, the expansion / contraction core body is in a contracted state due to its own restoring force. As described above, it is possible to easily and quickly remove the expanding / reducing core body without being unable to remove the tubular body from the tubular body or damaging the tubular body due to the deformation of the tubular body.

【0038】次に、請求項2にあっては、請求項1の拡
縮用牽引動力源と拡縮用円錐体との連結部を、適切な構
成部材により構成して拡縮中子本体の拡縮作業を円滑に
行い得るようにし、また拡縮用押動子をストローク調整
ナットにより形成して、各種寸法の筒状体に対して、望
ましい拡縮中子本体の拡張密着状態を、簡易な操作で確
保することが可能となる。
Next, in the second aspect, the connecting portion between the traction power source for expansion and contraction and the cone for expansion and contraction according to the first aspect is constituted by an appropriate component member to perform the operation of expanding and contracting the main body of the expansion and contraction core. To make it possible to perform smoothly and to form the expansion and contraction pusher with a stroke adjusting nut, to secure the desired expansion and contraction state of the expansion and contraction core body to the cylindrical body of various dimensions by simple operation. Becomes possible.

【0039】そして請求項3の場合には、拡縮中子本体
と拡縮用円錐体とにより構成された拡縮中子構成単体
を、一個でなく、所要複数個連設するようにし、これら
の拡縮中子構成単体における各拡縮中子本体を拡縮用牽
引動力源の稼動により、一斉に拡張自在なるよう構成し
たので、筒状体の所要各所にあって、拡縮中子本体を拡
張固定させることができることとなり、多数箇所の抵抗
溶接や成形加工を、極めて能率的に処理することができ
る。
In the case of the third aspect, not a single unit of the expansion / contraction core constituted by the expansion / contraction core body and the expansion / contraction cone, but a required number of these units are continuously provided. Since each expansion / contraction core body in a single unit is configured to be expandable at the same time by operating the traction power source for expansion / contraction, the expansion / contraction core body can be expanded and fixed at various places in the cylindrical body. Thus, resistance welding and forming at a large number of places can be processed extremely efficiently.

【図面の簡単な説明】[Brief description of the drawings]

【図1】横倒し状態に保持された筒状体内に挿入した本
発明に係る加圧変形防止用拡縮中子装置を示し、(A)
はその一部を切欠した正面図、(B)は左側面図であ
る。
FIG. 1 shows an expansion / contraction core device for preventing pressure deformation according to the present invention inserted into a tubular body held in a sideways position, and FIG.
Is a front view in which a part thereof is cut away, and (B) is a left side view.

【図2】本発明を構成する拡縮中子本体を示し、(A)
はその縦断正面図、(B)は右側端面図である。
FIG. 2 shows an expansion / contraction core body constituting the present invention, and (A)
Is a longitudinal front view, and (B) is a right end view.

【図3】同上本発明の構成部材である拡縮用円錐体を示
し、(A)はその外側端部の端面図で、(B)は一部切
欠の正面図である。
3A and 3B show an expansion / contraction cone as a constituent member of the present invention, wherein FIG. 3A is an end view of an outer end thereof, and FIG. 3B is a partially cutaway front view.

【図4】(A)は同上本発明の構成部材である拡縮用パ
ワーロッドの正面図、(B)は同上取付用プレートの左
側面図で、(C)は同上連結用カラの一部を切欠した正
面図である。
4A is a front view of a power rod for expansion and contraction as a component of the present invention, FIG. 4B is a left side view of a mounting plate of the same, and FIG. It is the notched front view.

【図5】本発明の図1に係る加圧変形防止用拡縮中子装
置の異種例を示した正面略示図である。
FIG. 5 is a schematic front view showing a different example of the expansion / contraction core device for preventing pressure deformation according to FIG. 1 of the present invention.

【図6】請求項3に係る加圧変形防止用拡縮中子装置の
一例を示した正面略示図である。
FIG. 6 is a schematic front view showing an example of an expansion / contraction core device for preventing pressure deformation according to claim 3;

【図7】ウォータチャンネルにタブを溶着するための抵
抗溶接装置を示し、(A)はその一部を切欠した正面図
で、(B)は左側面図である。
7A and 7B show a resistance welding apparatus for welding a tab to a water channel, wherein FIG. 7A is a front view in which a part thereof is cut away, and FIG. 7B is a left side view.

【図8】図7の抵抗溶接装置における加圧電極近傍を示
し、(A)は正面図、(B)は(A)の左側面図であ
る。
8 (A) is a front view, and FIG. 8 (B) is a left side view of FIG. 7 (A).

【図9】図7の抵抗溶接装置における抵抗溶接の電気系
統を示す回路構成図である。
FIG. 9 is a circuit diagram showing an electric system of resistance welding in the resistance welding apparatus of FIG. 7;

【図10】沸騰水型核燃料集合体を示す一部切欠の正面
図である。
FIG. 10 is a partially cutaway front view showing a boiling water nuclear fuel assembly.

【図11】(A)は図10における一構成部品であるウ
ォータチャンネルの正面図で、(B)は(A)のB−B
線断面図である。
11 (A) is a front view of a water channel which is one component in FIG. 10, and FIG. 11 (B) is BB of FIG.
It is a line sectional view.

【図12】(A)はスぺーサを嵌装したウォータチャン
ネルを示す一部を切欠した正面図、(B)は(A)の一
部を示す拡大正面図で、(C)は(B)の下面図であ
る。
12A is a partially cutaway front view showing a water channel fitted with a spacer, FIG. 12B is an enlarged front view showing a part of FIG. 12A, and FIG. FIG.

【符号の説明】[Explanation of symbols]

5 筒状体 5a 内周壁面 10 拡縮中子本体 10a 外周壁面 10b 拡縮用スリット 10c 軸心貫通洞 10d 切込口 10e 切込閉端 10f 貫通孔 10g 円錐状孔 10h 円錐状孔 11A 拡縮用円錐体 11B 拡縮用円錐体 11a 軸心通孔 11b 軸心通孔 11c 外側端部 11d 外側端部 11e 螺孔 12 拡縮用パワーロッド 12a 連結用螺杆部 12b 螺部 13 連結部 13b 取付用プレート 13c 取付孔 13d 取付ボルト 13e 連結用カラ 14 拡縮用牽引動力源 15 拡縮用押動子 15a ストローク調整ナット 16 拡縮中子構成単体 17 相間連結部 d 離間距離 g 間隙 Reference Signs List 5 cylindrical body 5a inner peripheral wall surface 10 expanding / contracting core body 10a outer peripheral wall surface 10b expanding / reducing slit 10c axial through hole 10d notch 10e notch closed end 10f through hole 10g conical hole 10h conical hole 11A conical hole 11A 11B Enlarging / contracting cone 11a Shaft through hole 11b Shaft through hole 11c Outer end 11d Outer end 11e Screw hole 12 Enlarging / reducing power rod 12a Connecting screw portion 12b Screw portion 13 Connecting portion 13b Mounting plate 13c Mounting hole 13d Mounting bolt 13e Connection collar 14 Expansion / contraction traction power source 15 Expansion / contraction pusher 15a Stroke adjustment nut 16 Expansion / contraction core component unit 17 Interphase connection part d Separation distance g Gap

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 筒状体の内周壁面に、略均等な間隙をも
って遊嵌自在である外周壁面が形成され、当該外周壁面
から軸心貫通洞まで達して、切込口と切込閉端とが逆向
配置となるよう軸心方向へ所望複数条だけ全周面にわた
って拡縮用スリットが穿設され、上記軸心貫通洞が軸心
方向中央部の貫通孔と、軸心方向両端部から上記の貫通
孔まで次第に径小となるよう穿設された各円錐状孔とに
より形成されている拡縮中子本体と、当該拡縮中子本体
の各円錐状孔に嵌合されると共に軸心通孔が穿設されて
いる各拡縮用円錐体と、当該両軸心通孔と前記貫通孔と
に貫挿した拡縮用パワーロッドと、一方である拡縮用円
錐体の外側端部に連結部によって連設され、上記拡縮用
パワーロッドの一端と連結された拡縮用牽引動力源と、
当該拡縮用牽引動力源の稼動により牽引される上記拡縮
用パワーロッドの他端に設けられ、当該牽引により他方
である拡縮用円錐体の外側端部を押動して、当該拡縮用
円錐体を他方の拡縮用円錐体側へ移動することで、前記
拡縮用中子本体を拡縮自在なるよう拡張し、これにより
当該拡縮用中子本体の外周壁面を、前記の筒状体におけ
る内周壁面に押当自在とした拡縮用押動子とからなるこ
とを特徴とする筒状体の加圧変形防止用拡縮中子装置。
1. An inner peripheral wall surface of a cylindrical body is formed with an outer peripheral wall surface which can be freely fitted with a substantially uniform gap, extends from the outer peripheral wall surface to a shaft through hole, and has a notch and a notch closed end. A plurality of slits for expansion and contraction are drilled in the axial direction over the entire peripheral surface by a desired number of lines so that they are arranged in the opposite direction, and the axial through hole is formed through the through hole at the central portion in the axial direction, The expansion and contraction core body formed by each conical hole drilled so as to gradually decrease in diameter up to the through hole, and the axial core through hole fitted into each of the conical holes of the expansion and contraction core body. Are connected to the outer end of one of the enlarging / contracting cones, the enlarging / contracting power rods penetrating the two axial through holes and the through holes, and a connecting portion. An expansion / contraction traction power source, which is connected to one end of the expansion / contraction power rod,
The expansion / contraction power rod is provided at the other end of the expansion / contraction power rod which is towed by the operation of the expansion / contraction traction power source, and the outer end of the other expansion / contraction cone is pushed by the traction to cause the expansion / contraction cone to move. By moving to the other expansion / contraction core side, the expansion / contraction core body is expanded so as to be expandable / contractible, whereby the outer peripheral wall surface of the expansion / contraction core body is pressed against the inner peripheral wall surface of the cylindrical body. An expansion / contraction core device for preventing a cylindrical body from being deformed under pressure, comprising an expansion / contraction pusher that can be freely moved.
【請求項2】 一方である拡縮用円錐体と拡縮用牽引動
力源とを連設する連結部が、拡縮用牽引動力源を取着す
る取付用プレートと、この取付用プレートを上記拡縮用
円錐体の外側端部に刻設された複数の各螺孔に、当該取
付用プレートの取付孔から挿通して螺着する取付ボルト
と、この取付ボルトに被嵌されて上記取付用プレートと
上記一方の拡縮用円錐体における外側端部との間に介装
固定される連結用カラとからなり、上記の拡縮用牽引動
力源が空気圧または油圧のシリンダにより形成され、拡
縮用パワーロッドに設けられた拡縮用押動子が、当該拡
縮用パワーロッドの他端に刻設した螺部に螺嵌され
縮用牽引動力源による牽引ストロークを調整自在とした
ストローク調整ナットにより形成されている請求項1記
載の筒状体の加圧変形防止用拡縮中子装置。
2. A connecting part for connecting a conical expansion / contraction body and a traction power source for expansion / contraction to a mounting plate for mounting a traction power source for expansion / contraction, and the mounting plate is connected to the conical cone for expansion / contraction. A plurality of screw holes engraved at the outer end of the body, a mounting bolt inserted through the mounting hole of the mounting plate and screwed, and the mounting plate fitted to the mounting bolt and
A connection collar interposed and fixed between the outer end of the one of the expansion and contraction cones , wherein the expansion and contraction traction power source is formed by a pneumatic or hydraulic cylinder and provided on the expansion and contraction power rod. It was scaled for pushing element is, by the stroke adjustment nut and adjustable traction strokes are screwed to the screw portion which is engraved on the other end of the scaling for power rod by expanding <br/> condensation towing power source The expansion / contraction core device for preventing a cylindrical body from being deformed under pressure according to claim 1 formed.
【請求項3】 筒状体の内周壁面に、略均等な間隙をも
って遊嵌自在である外周壁面が形成され、当該外周壁面
から軸心貫通洞まで達して、切込口と切込閉端とが逆向
配置となるよう軸心方向へ所望複数条だけ全周面にわた
って拡縮用スリットが穿設され、上記軸心貫通洞が軸心
方向中央部の貫通孔と、軸心方向両端部から上記の貫通
孔まで次第に径小となるよう穿設された各円錐状孔とに
より形成されている拡縮中子本体と、当該拡縮中子本体
の各円錐状孔に嵌合されると共に軸心通孔が穿設されて
いる各拡縮用円錐体とにより拡縮中子構成単体を組成
し、当該拡縮中子構成単体を所要数個だけ同一軸線上に
配装して、各拡縮中子構成単体の各軸心通孔と前記貫通
孔とに拡縮用パワーロッドを貫挿し、一方端である拡縮
中子構成単体の一方である拡縮用円錐体における外側端
部に、上記拡縮用パワーロッドの一端が連結された拡縮
用牽引動力源を連結部によって連設すると共に、これら
各拡縮中子構成単体間には、相対する拡縮用円錐体の各
外側端部を、所望の離間距離をもって相間連結部により
連設し、前記拡縮用牽引動力源の稼動により牽引される
上記拡縮用パワーロッドの最終端である拡縮中子構成単
体から延出する端部に拡縮用押動子を設けて、当該牽引
により当該拡縮用押動子が、上記拡縮中子構成単体の終
端側である拡縮用円錐体の外側端部を押動して、当該拡
縮用円錐体を他方の拡縮用円錐体側へ移動させ、これに
より、残余の全拡縮中子構成単体における終端側の拡縮
用円錐体も連動して、各拡縮用中子本体が拡縮自在なる
よう拡張され、これら各拡縮用中子本体の外周壁面が、
前記の筒状体における内周壁面の所望複数箇所に押当自
在であることを特徴とする筒状体の加圧変形防止用拡縮
中子装置。
3. An inner peripheral wall surface of the tubular body is formed with an outer peripheral wall surface which can be loosely fitted with a substantially uniform gap, reaches from the outer peripheral wall surface to the axial through hole, and has a cutout and a cut closed end. A plurality of slits for expansion and contraction are drilled in the axial direction over the entire peripheral surface by a desired number of lines so that they are arranged in the opposite direction, and the axial through hole is formed through the through hole at the central portion in the axial direction, The expansion and contraction core body formed by each conical hole drilled so as to gradually decrease in diameter up to the through hole, and the axial core through hole fitted into each of the conical holes of the expansion and contraction core body. Each of the expansion / contraction cores formed with the expansion / contraction cores is formed, and only a required number of the expansion / contraction cores are arranged on the same axis. A power rod for expansion and contraction is inserted through the shaft center through-hole and the through-hole, and one end of the expansion / contraction core structure alone at one end An expansion / contraction traction power source having one end of the power rod for expansion / contraction connected to an outer end portion of a certain cone for expansion / contraction by a connecting portion. Expansion and contraction core units each of which is a final end of the power rod for expansion and contraction, wherein the outer ends of the power cones are connected to each other by a phase connecting portion with a desired separation distance, and are pulled by the operation of the power source for expansion and contraction. An expansion / contraction pusher is provided at an end extending from the outer peripheral portion, and the traction causes the expansion / contraction pusher to push the outer end of the expansion / contraction cone, which is the end side of the expansion / contraction core component alone. Then, the expansion / contraction cone is moved to the other expansion / contraction cone side, whereby the expansion / contraction cone on the terminal side of the remaining entire expansion / contraction core unit is also linked, and each expansion / contraction core body is expanded / contracted. Each of these cores for expansion and contraction The outer wall surface,
An expanding and contracting core device for preventing deformation of a cylindrical body under pressure, wherein the core can be pressed against a plurality of desired locations on an inner peripheral wall surface of the cylindrical body.
JP08104301A 1996-03-29 1996-03-29 Expanding and contracting core device for preventing pressure deformation of cylindrical body Expired - Fee Related JP3081989B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP08104301A JP3081989B2 (en) 1996-03-29 1996-03-29 Expanding and contracting core device for preventing pressure deformation of cylindrical body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08104301A JP3081989B2 (en) 1996-03-29 1996-03-29 Expanding and contracting core device for preventing pressure deformation of cylindrical body

Publications (2)

Publication Number Publication Date
JPH09269391A JPH09269391A (en) 1997-10-14
JP3081989B2 true JP3081989B2 (en) 2000-08-28

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Family Applications (1)

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Country Link
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CN105082237A (en) * 2015-09-16 2015-11-25 成都爆米花信息技术有限公司 Clamping device of splitting machine
TWI616323B (en) * 2016-03-10 2018-03-01 Hsin Yung Chien Co Ltd Pressurized mold for making the case
RU2654531C1 (en) * 2017-09-29 2018-05-21 Акционерное общество "ТВЭЛ" (АО "ТВЭЛ") Nuclear reactor fuel assembly
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CN111421214B (en) * 2020-03-25 2021-10-29 合肥派霸电气科技有限公司 Pipeline tool device of pencil threading pipeline welding usefulness

Also Published As

Publication number Publication date
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