JPH0751947A - Working device for vertical type pipe body - Google Patents
Working device for vertical type pipe bodyInfo
- Publication number
- JPH0751947A JPH0751947A JP5206064A JP20606493A JPH0751947A JP H0751947 A JPH0751947 A JP H0751947A JP 5206064 A JP5206064 A JP 5206064A JP 20606493 A JP20606493 A JP 20606493A JP H0751947 A JPH0751947 A JP H0751947A
- Authority
- JP
- Japan
- Prior art keywords
- discharge electrode
- drive
- vertical
- electrode
- pipe body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、原子炉圧力容器等に設
けられている縦型管体を放電加工する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for electric discharge machining of a vertical tube provided in a reactor pressure vessel or the like.
【０００２】[0002]
【従来の技術】従来の放電加工装置としては、特開昭59
−64222 号のように原子炉炉内機器等の溶接部の除去の
ため、電極を筒状の本体に収容して遠隔操作による放電
加工をすることで、作業者の放射線被爆を防止してい
た。2. Description of the Related Art As a conventional electric discharge machine, Japanese Patent Laid-Open No.
In order to remove the welded parts of reactor internal equipment such as -64222, the electrodes were housed in a cylindrical body and the electrical discharge machining was performed by remote control to prevent workers from being exposed to radiation. .
【０００３】また特開昭63−34024 号のように、原子炉
圧力容器の炉内構造物である上部格子板の面取りのた
め、これと電極ホルダ間に電位を与えて放電加工すると
ともに、この発生屑を水噴射及び回収機構で回収してい
た。Further, as disclosed in Japanese Patent Laid-Open No. 63-34024, in order to chamfer the upper lattice plate which is the internal structure of the reactor pressure vessel, an electric potential is applied between the upper lattice plate and the electrode holder to perform electric discharge machining. The generated dust was collected by a water injection and collection mechanism.
【０００４】[0004]
【発明が解決しようとする課題】上記従来技術では次の
ような課題があった。The above-mentioned prior art has the following problems.
【０００５】（１）細く長い縦型管体のように遠隔から
の操作ができかつ装置を小型化するのが困難であった。(1) It is difficult to downsize the device because it can be operated remotely like a thin and long vertical tube.
【０００６】（２）放電加工する体積が少ない場合は電
極の消耗は問題にならないが、加工する体積が多くなる
と電極の消耗量も多くなるので、目的の加工精度が得ら
れない。(2) When the volume of the electric discharge machining is small, the consumption of the electrode is not a problem, but when the volume of the machining is large, the consumption amount of the electrode is also large, so that the intended machining accuracy cannot be obtained.
【０００７】さらに消耗量が多くなると局部的な消耗が
起こり易くなり、電極形状も大きく変形するので、目的
の形状に加工ができなくなる。Further, if the amount of wear increases, local wear tends to occur, and the shape of the electrode is also greatly deformed, so that it becomes impossible to process it into a desired shape.
【０００８】（３）放電加工する電極の送りは深さ方向
であるので、加工する形状は電極形状に依存し、１回の
放電加工で除去する範囲は電極の大きさに限定される。(3) Since the electrode to be electric discharge machined is fed in the depth direction, the shape to be machined depends on the shape of the electrode, and the range to be removed by one electric discharge machining is limited to the size of the electrode.
【０００９】従って、本発明の目的は、細く長い縦型管
体に適用できかつ遠隔操作が可能な放電加工装置であっ
て、その電極の消耗量を少なくできるとともに放電加工
のできる範囲を自由に選択でき、かつ広くできる様にす
ることである。Therefore, an object of the present invention is an electric discharge machine which can be applied to a thin and long vertical tube body and can be operated remotely. It is to be selectable and wide.
【００１０】[0010]
【課題を解決するための手段】放電電圧を一定にするた
め電極を消耗量と加工量に応じて電極を送る手段と、電
極の消耗を少なくするため電極を自転させる手段と、加
工範囲と加工深さを任意に変えるため、電極を含む機構
部を縦型管体内面の周方向と軸方向に駆動できる手段と
を設ける。[Means for Solving the Problems] Means for sending an electrode in accordance with the amount of wear and machining of the electrode in order to keep the discharge voltage constant, means for rotating the electrode to reduce wear of the electrode, machining range and machining. In order to arbitrarily change the depth, a means for driving the mechanical portion including the electrode in the circumferential direction and the axial direction of the inner surface of the vertical tubular body is provided.
【００１１】[0011]
【作用】機構部を上下方向に積層配置，分散配置するこ
とにより細く長い縦型管体に適用できかつ遠隔操作を可
能にする。[Function] By vertically arranging and distributing the mechanical parts, it can be applied to a thin and long vertical pipe body and enables remote operation.
【００１２】また放電加工装置電極の消耗量に応じて電
極を送るので安定した放電電圧が得られる。Further, since the electrodes are sent according to the amount of wear of the electrodes of the electric discharge machine, a stable discharge voltage can be obtained.
【００１３】また電極を自転させることにより放電位置
を変えて電極の消耗を電極全面に分散させることができ
る。さらに電極を縦型管体の周方向と軸方向に駆動する
ことにより、縦型管体内面の任意の範囲を目的の深さに
加工することができる。Further, by rotating the electrode on its own axis, the discharge position can be changed and the consumption of the electrode can be dispersed over the entire surface of the electrode. Further, by driving the electrodes in the circumferential direction and the axial direction of the vertical tubular body, it is possible to process an arbitrary range on the inner surface of the vertical tubular body to a desired depth.
【００１４】[0014]
【実施例】以下、本発明を原子炉圧力容器に付属する縦
型管体のうち、ＣＲＤハウジングに適用した場合の一実
施例について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a CRD housing among the vertical pipes attached to a reactor pressure vessel will be described below.
【００１５】図１から本発明の装置構成を説明すると、
ＣＲＤハウジング４の管内に挿入されて放電加工する放
電加工部１２、放電電極を駆動する上部駆動部１１、放
電部を管内に調心するための上下の調心部１４，１３、
装置を管に倣わせるためのベローズ等のフレキシブルジ
ョイント部１５、装置本体とアクセス部を連結する連結
部１０、水中放電加工による加工残渣と廃液を回収する
廃液回収部１７、管内に挿入された部分を軸方向と周方
向に駆動する下部駆動部１８、電気系統，給水系統等を
連結部内に案内するための中継部１６、放電の高周波電
圧を印加，制御する電源部１９及び各駆動部１１，１８
を駆動制御する駆動制御部２０から構成される。The device configuration of the present invention will be described with reference to FIG.
An electric discharge machining part 12 which is inserted into the tube of the CRD housing 4 for electric discharge machining, an upper drive part 11 for driving an electric discharge electrode, upper and lower centering parts 14, 13 for centering the electric discharge part in the tube,
A flexible joint part 15 such as a bellows for making the device imitate a pipe, a connection part 10 for connecting the device body and the access part, a waste liquid recovery part 17 for recovering processing residues and waste liquid by underwater electric discharge machining, and inserted in the pipe. A lower drive unit 18 that drives a portion in the axial direction and the circumferential direction, a relay unit 16 that guides an electric system, a water supply system, and the like into the connection unit, a power supply unit 19 that applies and controls a high-frequency voltage for discharge, and each drive unit 11 , 18
It is composed of a drive control unit 20 for controlling the drive of the.
【００１６】さらに本発明の放電加工装置を詳細に説明
すれば、図２は原子炉圧力容器の主要部を示したもの
で、胴体部１にフランジ７，８を介して上鏡部２が取り
付けられ、また胴体部１の下部に溶接構造によって下鏡
部３が取り付けられる。The electric discharge machining apparatus of the present invention will be described in more detail. FIG. 2 shows the main part of the reactor pressure vessel. The upper mirror section 2 is attached to the body section 1 via flanges 7 and 8. The lower mirror portion 3 is attached to the lower portion of the body portion 1 by a welded structure.
【００１７】さらに下鏡部３にはＣＲＤハウジング４と
ＩＣＭハウジング（図示せず）が溶接構造で垂直に取り
付けられる。Further, a CRD housing 4 and an ICM housing (not shown) are vertically attached to the lower mirror portion 3 by a welding structure.
【００１８】図１は本発明の装置をＣＲＤハウジングに
適用した例で、ＣＲＤハウジング４は長さが約４ｍあ
り、外径約１６０mm，内径約１２３mmの縦型管体で、下
部にはＣＲＤロッドを固定するフランジ５が取り付けら
れている。FIG. 1 shows an example in which the apparatus of the present invention is applied to a CRD housing. The CRD housing 4 is a vertical tube body having a length of about 4 m, an outer diameter of about 160 mm and an inner diameter of about 123 mm, and a CRD rod at the bottom. A flange 5 for fixing is attached.
【００１９】このＣＲＤハウジング４は下鏡部３にスタ
ブ６を介して溶接されている。The CRD housing 4 is welded to the lower mirror portion 3 via a stub 6.
【００２０】本発明の装置を取り付ける前にＣＲＤロッ
ドを抜き出し、ＣＲＤハウジング内を空にしておく。Before mounting the device of the present invention, the CRD rod is pulled out and the inside of the CRD housing is emptied.
【００２１】フランジ５に廃液回収部１７と下部駆動部
１８をボルト２７を介して取り付けた後、放電加工部１
２等を連結した連結部１０を管内に挿入し、所定の高さ
に位置決めしてから下部駆動部１８内で連結部１０をク
ランプする。After the waste liquid recovery unit 17 and the lower drive unit 18 are attached to the flange 5 via the bolts 27, the electric discharge machining unit 1
The connecting portion 10 connecting the two or the like is inserted into the pipe, positioned at a predetermined height, and then the connecting portion 10 is clamped in the lower drive portion 18.
【００２２】次の準備作業は電源部１９からの放電電源
用のケーブル２４，２１をそれぞれ中継部１６，フラン
ジ５に接続し、他方の駆動制御部２０からのケーブル２
５，２８も中継部１６，下部駆動部１８のそれぞれに接
続する。In the next preparatory work, cables 24 and 21 for discharging power from the power source unit 19 are connected to the relay unit 16 and the flange 5, respectively, and the cable 2 from the other drive control unit 20 is connected.
5, 28 are also connected to the relay section 16 and the lower drive section 18, respectively.
【００２３】また給水系のパイプ２３と空気圧系のパイ
プ２２も中継部１６に接続する。The water supply pipe 23 and the pneumatic pipe 22 are also connected to the relay section 16.
【００２４】放電加工部１２の詳細は、図３に示すよう
にシャフト４１を中心に回転可能に取り付けられる電極
３０があり、モータ３８からの回転力をギヤ３９を介し
てシャフト４１に伝導させることにより電極３０を回転
できる。As shown in FIG. 3, the details of the electric discharge machining unit 12 include an electrode 30 rotatably mounted around a shaft 41, and the rotational force from a motor 38 is transmitted to the shaft 41 via a gear 39. Thus, the electrode 30 can be rotated.
【００２５】電極３０には給電用のスライド板３１が接
触し、ケーブル２４の先端が接続される。A slide plate 31 for power supply is brought into contact with the electrode 30, and the tip of the cable 24 is connected.
【００２６】したがってシャフト４１とスライド板３１
の間は電気的に絶縁されている。Therefore, the shaft 41 and the slide plate 31
There is electrical insulation between them.
【００２７】これら電極３０等を支持するためのホルダ
３２があり、このホルダ３２はスライダ３３と一体にな
って電極３０をＣＲＤハウジング４の半径方向に移動で
きる。There is a holder 32 for supporting these electrodes 30 and the like, and this holder 32 is integrated with a slider 33 so that the electrode 30 can be moved in the radial direction of the CRD housing 4.
【００２８】この駆動は駆動部１１内に設置してあるモ
ータ３６の回転力をギヤ３５を介してネジ４０を回転さ
せスライダ３３を移動させる。This drive causes the torque of the motor 36 installed in the drive unit 11 to rotate the screw 40 via the gear 35 to move the slider 33.
【００２９】スライダ３３にはネジ４０と並行してシャ
フト４６が両端で支持板３４に固定されているので、ス
ライダ３３は円滑に移動できる。Since the shaft 46 is fixed to the support plate 34 at both ends of the slider 33 in parallel with the screw 40, the slider 33 can move smoothly.
【００３０】この移動量はネジ４０，モータ３６等の回
転数をエンコーダ（図示せず）で検出することにより知
ることができる。This amount of movement can be known by detecting the number of revolutions of the screw 40, the motor 36, etc. by an encoder (not shown).
【００３１】電極３０（＋極）は、このスライダ３３に
よってＣＲＤハウジング４内面に近付けることにより、
ＣＲＤハウジング４の下部フランジには（−極）が接続
されているので放電を開始する。The electrode 30 (+ pole) is brought closer to the inner surface of the CRD housing 4 by the slider 33,
Since the (-pole) is connected to the lower flange of the CRD housing 4, discharge is started.
【００３２】この放電加工は水中で行うために事前に電
極３０近傍に純水が供給されている。Since this electric discharge machining is performed in water, pure water is previously supplied in the vicinity of the electrode 30.
【００３３】この給水はＣＲＤハウジング４の下部から
パイプ２２を介して供給され、複数のノズル穴４５から
電極３０とＣＲＤハウジング４内面の間に向け、内面の
円周方向に沿って流し、加工残渣とともにＣＲＤハウジ
ング４下部から取り出される。This water supply is supplied from the lower portion of the CRD housing 4 through the pipe 22, and is directed from the plurality of nozzle holes 45 between the electrode 30 and the inner surface of the CRD housing 4 along the circumferential direction of the inner surface to leave a processing residue. Together with this, it is taken out from the lower part of the CRD housing 4.
【００３４】加工液の余分なものはオーバフロー管３７
からＣＲＤハウジング４の下部に流され管内の液面を一
定に保つとともにモータ３８の防水をする。Excessive working fluid is overflow pipe 37.
To the lower part of the CRD housing 4 to keep the liquid level in the tube constant and to waterproof the motor 38.
【００３５】放電加工する場合の電極３０の動作は、電
極３０を回転させながらＣＲＤハウジング４内面との放
電電圧を一定電圧に制御（放電電圧と放電間隔は比例す
る）して、図１に示した下部駆動部１８で円周方向に駆
動して全周を放電加工する。これを繰り返すことにより
内面の深さ方向の加工ができる。The operation of the electrode 30 in the electric discharge machining is shown in FIG. 1 by controlling the discharge voltage with the inner surface of the CRD housing 4 to a constant voltage while rotating the electrode 30 (the discharge voltage and the discharge interval are proportional). Further, the lower drive unit 18 drives in the circumferential direction to perform electric discharge machining on the entire circumference. By repeating this, the inner surface can be processed in the depth direction.
【００３６】もちろん加工目的に応じてその範囲に見合
って周方向に駆動できる。Of course, it is possible to drive in the circumferential direction in accordance with the range according to the processing purpose.
【００３７】さらに図１に示した下部駆動部１８で軸方
向に駆動することにより、ＣＲＤハウジング４内面を軸
方向にも放電加工できる。Further, by driving the lower drive unit 18 shown in FIG. 1 in the axial direction, the inner surface of the CRD housing 4 can be also electric discharge machined in the axial direction.
【００３８】放電加工深さの測定は電極近傍に取り付け
たギャップセンサ（図示せず）で、加工前の値を基準に
ある加工間隔でギャップを測定し、加工深さを測定す
る。The electric discharge machining depth is measured by a gap sensor (not shown) mounted in the vicinity of the electrode to measure the gap at a machining interval based on the value before machining to measure the machining depth.
【００３９】なお図４のパイプ２３は上部の調心部１４
のエアシリンダ駆動のための空気圧供給用である。The pipe 23 shown in FIG.
It is for supplying air pressure for driving the air cylinder.
【００４０】図３のＡ〜Ａを示すと図４になる。FIG. 4 shows A to A of FIG.
【００４１】ＣＲＤハウジング４内に挿入された放電加
工部にはシャフト４１を中心に回転する電極３０とこれ
に給電するためのスライド板３１とこれを支持し電極３
０を半径方向に移動させるホルダ３２が配置されてい
る。In the electric discharge machined portion inserted in the CRD housing 4, an electrode 30 rotating about a shaft 41, a slide plate 31 for supplying power to the electrode 30 and an electrode 3 supporting the electrode 30 are provided.
A holder 32 for moving 0 in the radial direction is arranged.
【００４２】また給水用のパイプ２２とオーバフロー管
３７と空気圧用のパイプ２３も配置されている。A water supply pipe 22, an overflow pipe 37 and an air pressure pipe 23 are also arranged.
【００４３】さらに電極３０をＣＲＤハウジング４の半
径方向に送り出すための開口部４２が設けてある。Further, there is provided an opening 42 for sending out the electrode 30 in the radial direction of the CRD housing 4.
【００４４】ＣＲＤハウジング４の内面を精度良く加工
するためには電極３０を内面に調心して取り付ける必要
がある。In order to process the inner surface of the CRD housing 4 with high accuracy, it is necessary to align and attach the electrode 30 to the inner surface.
【００４５】このため図１に示すように放電加工部１２
の上下に調心部１４，１３を取り付け、放電加工部１２
の偏心を防止する。For this reason, as shown in FIG.
Centering parts 14 and 13 are attached above and below the electric discharge machining part 12
Prevent eccentricity.
【００４６】上下の調心部１４，１３の構造は同じであ
るので上部の調心部１４の構造を図５に示す。Since the structures of the upper and lower aligning portions 14 and 13 are the same, the structure of the upper aligning portion 14 is shown in FIG.
【００４７】調心部１４にはエアシリンダ６５があり下
部から供給された空気圧によって動作する。The aligning portion 14 has an air cylinder 65 and operates by the air pressure supplied from the lower portion.
【００４８】挿入時はロッド６３がスプリング６２によ
り伸長した状態にあり、支持具６４にリンク６１の一方
が固定されているので、両リンク６１の角度が大きくな
り車輪６０は調心部１４内に収納される。At the time of insertion, since the rod 63 is extended by the spring 62 and one of the links 61 is fixed to the support tool 64, the angle of both links 61 is increased and the wheel 60 is positioned within the centering portion 14. It is stored.
【００４９】調心する場合は遠隔操作による空気圧でエ
アシリンダ６５のロッド６３を収縮させてリンク６１の
角度を小さくすることにより、車輪６０をＣＲＤハウジ
ング４の内面に押しつける。In the case of alignment, the wheel 63 is pressed against the inner surface of the CRD housing 4 by contracting the rod 63 of the air cylinder 65 by the air pressure by remote control to reduce the angle of the link 61.
【００５０】このリンク６１と車輪６０は周方向に分散
して取り付けてあり、通常は３か所により調心する。The links 61 and the wheels 60 are mounted in a dispersed manner in the circumferential direction, and normally they are aligned at three points.
【００５１】次に図１に示すようにＣＲＤハウジング４
下部に取り付けられる下部駆動部１８の詳細構造につい
て説明する。Next, as shown in FIG. 1, the CRD housing 4
The detailed structure of the lower drive unit 18 attached to the lower portion will be described.
【００５２】上部の放電加工部１２等が取り付けられた
連結部１０は下部駆動部１８内で固定され、ＣＲＤハウ
ジング４の周方向と軸方向に駆動できる。The connecting portion 10 to which the upper electric discharge machining portion 12 and the like are attached is fixed in the lower driving portion 18 and can be driven in the circumferential direction and the axial direction of the CRD housing 4.
【００５３】図６に示すように連結部１０は内部を貫通
し、上部の放電加工部１２が位置決めされた後にスライ
ダ５０に取り付けられたクランプバー５３によって固着
される。As shown in FIG. 6, the connecting portion 10 penetrates the inside, and after the electric discharge machining portion 12 on the upper portion is positioned, it is fixed by the clamp bar 53 attached to the slider 50.
【００５４】固着方法はクランプバー５３はヒンジ５５
を中心に回転できロックネジ５４を回転させて固着す
る。As for the fixing method, the clamp bar 53 has a hinge 55.
It is possible to rotate around, and the lock screw 54 is rotated and fixed.
【００５５】逆に連結部１０を上下に移動自在にする場
合は、ロックネジ５４を逆回転させればクランプバー５
３をヒンジ５５を中心に開放できる。On the contrary, in order to make the connecting portion 10 movable up and down, the lock screw 54 should be rotated in the reverse direction.
3 can be opened centering on the hinge 55.
【００５６】連結部１０を固着して周方向に駆動する場
合は、スライダ５０に固定したモータ５１を回転させて
ギヤを回し、クランプバー５３と一体のギヤ５２を回転
させると、クランプバー５３とスライダ５０は回転自在
に取り付けられているので連結部１０を周方向に回転で
きる。When the connecting portion 10 is fixed and is driven in the circumferential direction, the motor 51 fixed to the slider 50 is rotated to rotate the gear, and the gear 52 integrated with the clamp bar 53 is rotated. Since the slider 50 is rotatably attached, the connecting portion 10 can be rotated in the circumferential direction.
【００５７】また連結部１０を軸方向に駆動する場合
は、下部駆動部１８のケースに取り付けられたモータ５
６を回転させ、ギヤ５７を介して連結したネジ５８を回
転することにより、シャフト５９に沿ってスライダ５０
を上下に移動できる。When the connecting portion 10 is driven in the axial direction, the motor 5 attached to the case of the lower drive portion 18 is used.
6 is rotated, and the screw 58 connected through the gear 57 is rotated to move the slider 50 along the shaft 59.
Can be moved up and down.
【００５８】また周方向と軸方向の移動量は、モータ５
１，５６の回転数或いはギヤ５２，５７の回転数をエン
コーダ等（図示せず）で検出することにより測定でき
る。The amount of movement in the circumferential and axial directions is determined by the motor 5
It can be measured by detecting the number of revolutions of 1,56 or the number of revolutions of gears 52, 57 with an encoder or the like (not shown).
【００５９】さらにモータ５１，５６のケーブル２９は
下部駆動部１８から外部に取り出されてケーブル２８を
介して図１の駆動制御部２０に接続される。Further, the cables 29 of the motors 51 and 56 are taken out from the lower drive section 18 and connected to the drive control section 20 of FIG.
【００６０】次に図１の廃液回収部１７の内部構造は図
７に示すように連結部１０が貫通してＣＲＤハウジング
４の下部フランジ５に取り付けられる。Next, the internal structure of the waste liquid recovery part 17 of FIG. 1 is attached to the lower flange 5 of the CRD housing 4 through the connecting part 10 as shown in FIG.
【００６１】連結部１０に沿って上部から落下してきた
加工残渣を含んだ廃液は廃液回収部１７の内部からパイ
プ１６１を介して図１の廃液タンク２６に回収される。The waste liquid containing the processing residue, which has dropped from the upper portion along the connecting portion 10, is collected from the inside of the waste liquid collecting portion 17 through the pipe 161 to the waste liquid tank 26 of FIG.
【００６２】図７に示すように廃液は外部への漏れを防
ぐためＯリング６２，６４によってシールする。As shown in FIG. 7, the waste liquid is sealed by O-rings 62 and 64 to prevent leakage to the outside.
【００６３】すなわちフランジ５とのシール用のＯリン
グ６２と、連結部１０とのシール用のＯリング６４であ
る。That is, an O-ring 62 for sealing the flange 5 and an O-ring 64 for sealing the connecting portion 10.
【００６４】また廃液回収部１７を貫通した複数の穴１
６０によりボルト２７を利用して下部駆動部１８ととも
にＣＲＤハウジング４の下部フランジ５に取り付ける。A plurality of holes 1 penetrating the waste liquid collecting section 17
The bolt 27 is attached to the lower flange 5 of the CRD housing 4 together with the lower drive unit 18 by means of 60.
【００６５】図３ではオーバフロー管３７を利用して自
由液面をつくる方法について説明したがこれに限定され
るものではなく、例えばモータ３８を上部の調心部１４
内に収納し、回転軸をＯリングでシールし、シャフト４
１と連結すれば全体を水没した状態にできる。In FIG. 3, the method of forming the free liquid surface by using the overflow pipe 37 has been described, but the method is not limited to this.
It is housed inside and the rotary shaft is sealed with an O-ring. Shaft 4
The whole can be submerged by connecting with 1.
【００６６】勿論この場合は給水量と排水量を制御して
常に水浸状態を保つ必要があることは言うまでもない。Of course, in this case, it is needless to say that it is necessary to control the amount of water supply and the amount of drainage to always maintain the water immersion state.
【００６７】放電電極を回転型電極で説明したがこれだ
けに限定されるものではなく、例えば局部的な放電加工
や特殊な形状の放電加工の場合は、回転型電極よりその
形状に合った電極の方が有利になる。Although the discharge electrode has been described as a rotary electrode, the discharge electrode is not limited to this. For example, in the case of local electric discharge machining or electric discharge machining with a special shape, an electrode more suitable for the shape than the rotary electrode is used. Would be more advantageous.
【００６８】この場合の例を図８から説明する。An example of this case will be described with reference to FIG.
【００６９】図８は放電加工部１２と上部駆動部１１を
示したもので、電極７０は電気絶縁板７１を介してスラ
イダ３３に連結している。FIG. 8 shows the electric discharge machining section 12 and the upper drive section 11. The electrode 70 is connected to the slider 33 via an electric insulating plate 71.
【００７０】またケーブル２４を介して電圧が電極７０
に印加される。スライダ３３はモータ３６の回転力がギ
ヤ３５を介してネジ４０に伝えられることにより移動
し、電極７０の形状に合った放電加工をする。Further, a voltage is applied to the electrode 70 via the cable 24.
Applied to. The slider 33 moves when the rotational force of the motor 36 is transmitted to the screw 40 via the gear 35, and the electric discharge machining suitable for the shape of the electrode 70 is performed.
【００７１】この放電電圧の制御は、スライダ３３の動
きにより制御される。この場合も予めパイプ２２の穴４
５から純水を流しておきＣＲＤハウジング４内を水で満
たしてある。The control of this discharge voltage is controlled by the movement of the slider 33. Also in this case, the hole 4 of the pipe 22 is previously prepared.
Pure water is flown from 5 to fill the inside of the CRD housing 4 with water.
【００７２】この場合の下部駆動部は、放電加工中の駆
動よりも放電加工前の電極の周方向と軸方向の位置決め
に利用される。In this case, the lower drive unit is used for positioning the electrodes in the circumferential direction and the axial direction before the electric discharge machining, rather than during the electric discharge machining.
【００７３】回転型電極をＣＲＤハウジングの周方向に
回転させることで説明したが、目的によっては軸方向に
回転させることもできる。また電極を（＋）極にし、Ｃ
ＲＤハウジングを（−）極で説明したが、この極性を目
的に応じて逆にしても目的を達成することができる。Although the rotary electrode has been described as being rotated in the circumferential direction of the CRD housing, it may be rotated in the axial direction depending on the purpose. In addition, the electrode is made the (+) pole and C
Although the RD housing has been described with the (−) pole, the purpose can be achieved by reversing the polarity depending on the purpose.
【００７４】また本実施例では純水中の放電加工につい
て説明したが目的によっては油等の他の液体中でも適用
できる。In this embodiment, electric discharge machining in pure water has been described, but it may be applied to other liquids such as oil depending on the purpose.
【００７５】本発明をＣＲＤハウジングに適用すること
で説明したが、他の縦型管体、例えば、中性子計測用の
ＩＣＭハウジングにも同様に適用できることは言うまで
もない。Although the present invention has been described as applied to the CRD housing, it goes without saying that the present invention can also be applied to other vertical tube bodies, for example, an ICM housing for neutron measurement.
【００７６】全駆動部をＣＲＤハウジング４の管体内に
配置した例について図９から説明すると、放電加工部１
２とその電極を半径方向に駆動する駆動部１１と、その
前後に配置される上下の調心部１４，１３と、管体の曲
がりに対応するためのフレキシブルジョイント部１５
と、軸方向の駆動部８０と、周方向の駆動部９０及びこ
れらを支持する連結部１０が内部に挿入される。連結部
１０はフランジ５にボルト２７で固定された図６と同じ
クランプ方式の着脱部７９に支持される。An example in which all the driving parts are arranged in the tubular body of the CRD housing 4 will be described with reference to FIG.
2, a driving unit 11 for driving the electrodes in the radial direction, upper and lower aligning units 14 and 13 arranged before and after the driving unit, and a flexible joint unit 15 for dealing with bending of the tubular body.
The axial driving unit 80, the circumferential driving unit 90, and the connecting unit 10 supporting them are inserted into the inside. The connecting part 10 is supported by the same clamp type attaching / detaching part 79 as shown in FIG.
【００７７】また廃液回収部１７もフランジ５に支持さ
れる。The waste liquid collecting section 17 is also supported by the flange 5.
【００７８】各駆動部は駆動制御部２０から制御され、
放電加工部１２には電源部１９から高周波電圧が印加さ
れる。Each drive unit is controlled by the drive control unit 20,
A high frequency voltage is applied to the electric discharge machining unit 12 from a power supply unit 19.
【００７９】管内に挿入される軸方向の駆動部８０の詳
細は図１０に示すようにモータ８１で回転軸８５を回転
させると、これと連結したナット８８が回転し、ナット
８８と噛み合うネジ８６とシャフト８４が支持板８７と
スライドして管の軸方向に移動する。As shown in FIG. 10, when the rotary shaft 85 is rotated by the motor 81, the nut 88 connected to the rotary shaft 85 is rotated and the screw 86 meshing with the nut 88 is rotated. The shaft 84 slides on the support plate 87 and moves in the axial direction of the tube.
【００８０】すなわちこの先端に連結した上部の機構部
を軸方向に移動できる。That is, the upper mechanical portion connected to the tip can be moved in the axial direction.
【００８１】また回転はギヤ８３を介してエンコーダ８
２にも伝えられ移動量が検出される。The rotation is performed via the gear 83 to the encoder 8
It is also transmitted to 2 and the amount of movement is detected.
【００８２】管内に挿入される周方向の駆動部９０の詳
細を図１１に示すようにモータ９１の回転をギヤ９２を
介してシャフト９３に伝え、さらにギヤ９６を介して上
部の駆動部につながる回転軸９７を管の周方向に駆動す
る。As shown in FIG. 11, the details of the circumferential driving portion 90 inserted into the pipe are transmitted to the shaft 93 via the gear 92, and the gear 96 is connected to the upper driving portion via the gear 96. The rotating shaft 97 is driven in the circumferential direction of the tube.
【００８３】またシャフト９３には別のギヤ９４があ
り、この回転をエンコーダ９５に伝えて周方向の位置を
検出する。Further, the shaft 93 has another gear 94, and this rotation is transmitted to the encoder 95 to detect the position in the circumferential direction.
【００８４】本実施例によれば、次のような効果があ
る。According to this embodiment, there are the following effects.
【００８５】（１）ＣＲＤハウジング等のように細く長
い縦型管体内面の放電加工が遠隔操作で容易にできる。(1) It is possible to easily perform electrical discharge machining on the inner surface of a thin vertical tube such as a CRD housing by remote control.
【００８６】（２）電極を遠隔操作で周方向，軸方向及
び半径方向に駆動できるので、目的に応じて加工範囲，
加工深さを自由に選択して放電加工ができる。(2) Since the electrodes can be driven in the circumferential direction, the axial direction and the radial direction by remote control, the processing range,
Electric discharge machining is possible by freely selecting the machining depth.
【００８７】（３）電極を回転させることにより、電極
の局部的な消耗を防止できるので放電加工範囲を広くで
きるし、加工精度も向上する。(3) By rotating the electrode, local consumption of the electrode can be prevented, so that the electric discharge machining range can be widened and the machining accuracy can be improved.
【００８８】また放電位置が常に移動するので、加工残
渣が除去し易くなり放電性能が安定する。Further, since the discharge position constantly moves, the processing residue can be easily removed and the discharge performance becomes stable.
【００８９】（４）放電加工部を上下に設けた調心部の
遠隔操作により、管内に調心して取り付けできるので、
加工精度が向上する。(4) Since the electric discharge machining unit can be installed in the pipe by aligning it by remote operation of the aligning unit provided above and below,
The processing accuracy is improved.
【００９０】また管内への取り付け時と取り外し時は、
調心部を収縮させることができるので、取り付け，取り
外し作業が容易になり、作業時間が短縮できる。In addition, at the time of installation and removal in the pipe,
Since the centering portion can be contracted, the mounting and dismounting work becomes easy and the working time can be shortened.
【００９１】（５）管内に挿入した案内管にフレキシブ
ルジョイントを設けたことにより、管の曲がりに応じて
屈曲することができる。(5) Since the guide tube inserted into the pipe is provided with the flexible joint, it can be bent according to the bending of the pipe.
【００９２】（６）加工残渣を外部に容易に取り出すこ
とができる。(6) The processing residue can be easily taken out to the outside.
【００９３】（７）下部駆動部に設けたクランプ機構に
より、放電加工部を目的の高さに自由に設定できる(7) The electric discharge machining section can be freely set to a desired height by the clamp mechanism provided in the lower drive section.
【００９４】[0094]
【発明の効果】本発明によれば、細く長い縦型管体に適
用できかつ遠隔操作により管体の内面を放電加工でき
る。According to the present invention, the present invention can be applied to a thin and long vertical tube body, and the inner surface of the tube body can be electric discharge machined by remote control.
【００９５】また電極の消耗量を少なくできるとともに
その加工位置を自由に選択できかつ加工範囲も広くでき
る。Further, the consumption of the electrode can be reduced, the processing position can be freely selected, and the processing range can be widened.
【図１】本発明による装置の全体構成を示す部分断面図
である。FIG. 1 is a partial cross-sectional view showing the overall configuration of an apparatus according to the present invention.
【図２】原子炉圧力容器の断面図である。FIG. 2 is a sectional view of a reactor pressure vessel.
【図３】本発明による装置の放電加工部の部分断面図で
ある。FIG. 3 is a partial cross-sectional view of an electric discharge machined part of the device according to the present invention.
【図４】図３のＡ〜Ａ矢視断面図である。4 is a cross-sectional view taken along the arrows AA of FIG.
【図５】本発明による装置の調心部内部の側面図であ
る。FIG. 5 is a side view of the inside of the centering portion of the device according to the invention.
【図６】本発明による装置の下部駆動部の側面を示す部
分断面図である。FIG. 6 is a partial cross-sectional view showing a side surface of a lower driving unit of the device according to the present invention.
【図７】本発明による装置の廃液回収部の側面の部分断
面図である。FIG. 7 is a partial cross-sectional side view of a waste liquid recovery part of the device according to the present invention.
【図８】本発明による装置の放電加工部の変形例を示す
側面の部分断面図である。FIG. 8 is a partial side cross-sectional view showing a modified example of the electric discharge machining unit of the device according to the present invention.
【図９】本発明による装置の他の変形例の全体構成を示
す部分断面図である。FIG. 9 is a partial cross-sectional view showing the overall configuration of another modification of the device according to the present invention.
【図１０】本発明による装置の管内に挿入した軸方向駆
動部の部分断面図である。FIG. 10 is a partial cross-sectional view of the axial drive part inserted in the tube of the device according to the invention.
【図１１】本発明による装置の管内に挿入した周方向駆
動部の部分断面図である。FIG. 11 is a partial cross-sectional view of the circumferential drive part inserted in the tube of the device according to the invention.
４…ＣＲＤハウジング、５…フランジ、１０…連結部、
１１…上部駆動部、１２…放電加工部、１３，１４…調
心部、１５…フレキシブルジョイント部、１６…中継
部、１７…廃液回収部、１８…下部駆動部、１９…電源
部、２０…駆動制御部、２２，２３…パイプ、３０…電
極、３１…スライド板、３３，５０…スライダ、３６，
３８，５１，５６…モータ、４１，５９…シャフト、４
５…ノズル穴、５３…クランプバー、５８…ネジ、６１
…リンク、６５…エアシリンダ。4 ... CRD housing, 5 ... Flange, 10 ... Connection part,
11 ... Upper drive part, 12 ... Electric discharge machining part, 13, 14 ... Aligning part, 15 ... Flexible joint part, 16 ... Relay part, 17 ... Waste liquid collecting part, 18 ... Lower drive part, 19 ... Power supply part, 20 ... Drive controller, 22, 23 ... Pipe, 30 ... Electrode, 31 ... Slide plate, 33, 50 ... Slider, 36,
38, 51, 56 ... Motor, 41, 59 ... Shaft, 4
5 ... Nozzle hole, 53 ... Clamp bar, 58 ... Screw, 61
… Link, 65… Air cylinder.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 古川 秀康 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 志村 孝夫 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideyasu Furukawa 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Takao Shimura 3-chome, 1-cho, Hitachi-shi, Ibaraki No. 1 Hitachi Ltd. Hitachi factory
Claims (5)
放電電極近傍を液浸状態にする給液機構部と、該縦型管
体内部に設置されて該放電電極を半径方向に駆動する駆
動部Ａと、該放電電極と該駆動部Ａの上下に配置される
複数の調心機構と、該縦型管体内部に設置される各機構
部を該縦型管体内部の周方向と軸方向に駆動しかつ該機
構部を着脱する駆動部Ｂと、該縦型管体内部の廃液を外
部に取り出す廃液回収部と、該放電電極と該縦型管体の
間に高周波電圧を印加する電源部と、該各駆動部Ａ，Ｂ
を遠隔から駆動制御する駆動制御部とから構成されるこ
とを特徴とする縦型管体の作業装置。1. A discharge electrode installed inside a vertical tube body, a liquid supply mechanism section for making the vicinity of the discharge electrode into a liquid immersion state, and a discharge electrode installed inside the vertical tube body in a radial direction. A drive unit A that drives the discharge electrode, a plurality of aligning mechanisms arranged above and below the discharge electrode and the drive unit A, and each mechanism unit installed inside the vertical tubular body inside the vertical tubular body. A drive unit B that drives in the circumferential direction and the axial direction and attaches and detaches the mechanism unit, a waste liquid recovery unit that takes out the waste liquid inside the vertical tube body to the outside, and a high frequency wave between the discharge electrode and the vertical tube body. A power supply unit for applying a voltage and each of the driving units A and B
A working device for a vertical pipe body, comprising: a drive control unit for remotely controlling the drive of the.
フレキシブルジョイントを配置したことを特徴とする縦
型管体の作業装置。2. A working device for a vertical pipe body according to claim 1, wherein a flexible joint is arranged below the lower aligning mechanism.
し、これを管体の周方向に回転できる駆動部を設けたこ
とを特徴とする縦型管体の作業装置。3. A working device for a vertical tubular body according to claim 1, wherein the discharge electrode is of a rotary type, and a drive unit is provided which can rotate the discharge electrode in a circumferential direction of the tubular body.
めのギャップセンサを放電電極近傍に設けたことを特徴
とする縦型管体の作業装置。4. A working device for a vertical tubular body according to claim 1, wherein a gap sensor for measuring a working depth is provided near the discharge electrode.
電電極と、該放電電極近傍を液浸状態にする給液機構部
と、該縦型管体内部に設置されて該放電電極を半径方向
に駆動する駆動部Ａと、該放電電極と該駆動部Ａの上下
に配置される複数の調心機構と、上記各機構部を該縦型
管体内の周方向と軸方向に駆動する駆動部Ｂとで構成し
た挿入部を該縦型管体内部に配置するとともに、該縦型
管体下部に設置される該管体内部の廃液を外部に取り出
す廃液回収部と、該挿入部の該縦型管体の下部への着脱
部と、該放電電極と該縦型管体の間に高周波電圧を印加
する電源部と、該各駆動部Ａ，Ｂを遠隔から駆動制御す
る駆動制御部とから構成されることを特徴とする縦型管
体の作業装置。5. A discharge electrode installed in the vicinity of a processing position of a vertical tube, a liquid supply mechanism section for making the vicinity of the discharge electrode in a liquid immersion state, and the discharge installed in the vertical tube. A drive unit A for driving the electrodes in the radial direction, a plurality of aligning mechanisms arranged above and below the discharge electrode and the drive unit A, and each of the above mechanism units in the circumferential direction and the axial direction in the vertical tubular body. An insertion part constituted by a driving part B for driving is disposed inside the vertical pipe body, and a waste liquid recovery part installed below the vertical pipe body for taking out a waste liquid inside the pipe body to the outside, and the insertion part Part for attaching to and detaching from the lower part of the vertical tube body, a power supply part for applying a high frequency voltage between the discharge electrode and the vertical tube body, and a drive for remotely controlling the driving parts A and B. A working device for a vertical pipe body, comprising: a control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5206064A JPH0751947A (en) | 1993-08-20 | 1993-08-20 | Working device for vertical type pipe body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5206064A JPH0751947A (en) | 1993-08-20 | 1993-08-20 | Working device for vertical type pipe body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0751947A true JPH0751947A (en) | 1995-02-28 |
Family
ID=16517251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5206064A Pending JPH0751947A (en) | 1993-08-20 | 1993-08-20 | Working device for vertical type pipe body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751947A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6211482B1 (en) * | 1997-10-24 | 2001-04-03 | Electric Power Research Institute, Inc. | Apparatus and method for precision excavation and welding of thick-walled components |
| JP2007253293A (en) * | 2006-03-24 | 2007-10-04 | Central Res Inst Of Electric Power Ind | Device and method for removing oxide film on piping inner surface with reduced pressure arc, and program therefor |
| JP2009291921A (en) * | 2008-06-09 | 2009-12-17 | Hitachi-Ge Nuclear Energy Ltd | Method and apparatus for machining rod-shaped elongated member |
| KR101032256B1 (en) * | 2009-05-13 | 2011-05-02 | 현대하이스코 주식회사 | junction sensing apparatus for flash butt welder and method thereof |
| EP2898975A1 (en) * | 2014-01-24 | 2015-07-29 | Westinghouse Electric Germany GmbH | Eroding device and eroding method for processing hollow cylindrical workpieces |
| US9764404B2 (en) | 2012-12-27 | 2017-09-19 | Westinghouse Electric Germany Gmbh | Erosion device and erosion method for machining hollow-cylindrical workpieces |
-
1993
- 1993-08-20 JP JP5206064A patent/JPH0751947A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6211482B1 (en) * | 1997-10-24 | 2001-04-03 | Electric Power Research Institute, Inc. | Apparatus and method for precision excavation and welding of thick-walled components |
| JP2007253293A (en) * | 2006-03-24 | 2007-10-04 | Central Res Inst Of Electric Power Ind | Device and method for removing oxide film on piping inner surface with reduced pressure arc, and program therefor |
| JP2009291921A (en) * | 2008-06-09 | 2009-12-17 | Hitachi-Ge Nuclear Energy Ltd | Method and apparatus for machining rod-shaped elongated member |
| KR101032256B1 (en) * | 2009-05-13 | 2011-05-02 | 현대하이스코 주식회사 | junction sensing apparatus for flash butt welder and method thereof |
| US9764404B2 (en) | 2012-12-27 | 2017-09-19 | Westinghouse Electric Germany Gmbh | Erosion device and erosion method for machining hollow-cylindrical workpieces |
| EP2898975A1 (en) * | 2014-01-24 | 2015-07-29 | Westinghouse Electric Germany GmbH | Eroding device and eroding method for processing hollow cylindrical workpieces |
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