JPH05162061A - Drive device of hole inner surface polishing unit - Google Patents

Drive device of hole inner surface polishing unit

Info

Publication number
JPH05162061A
JPH05162061A JP33067491A JP33067491A JPH05162061A JP H05162061 A JPH05162061 A JP H05162061A JP 33067491 A JP33067491 A JP 33067491A JP 33067491 A JP33067491 A JP 33067491A JP H05162061 A JPH05162061 A JP H05162061A
Authority
JP
Japan
Prior art keywords
hole
hollow arm
hollow arms
surface polishing
polishing unit
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.)
Withdrawn
Application number
JP33067491A
Other languages
Japanese (ja)
Inventor
Isao Tada
功 多田
Masayuki Miyamoto
雅之 宮本
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP33067491A priority Critical patent/JPH05162061A/en
Publication of JPH05162061A publication Critical patent/JPH05162061A/en
Withdrawn legal-status Critical Current

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  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

PURPOSE:To dispense with a traction device which is customarily provided separately from a polishing unit so as to reduce the size of the device and the working space, and further dispense with the attaching and detaching work of peripheral apparatuses so as to improve working efficiency. CONSTITUTION:This drive device of a hole inner surface polishing unit is provided with a grinder which is inserted in the rotor bore 11 of a turbine rotor 12 capably of advancing and retreating so as to polish the inner surface. Further, it is provided with a feed motor 37 for travel working loaded on a device main body, hollow arms 39, 45 pivotally supported with the device main body at the base end, travelling wheels 40, 46 mounted on the extreme ends of the hollow arms 39, 45, drive force transmitting mechanisms 38, 44 which are mounted in the hollow arms 39, 45 and constituted of a plurality of bevel gears 55, 56, 57, 58, 59 to transmittedly drive the feed motor 37 for travel working and the travelling wheels 40, 46, and oscillating links 41, 47 to be connected to the hollow arms 39, 45 and oscillates them.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は蒸気タービンロータに穿
設されたロータボアなどの孔内表面を研磨するための孔
内表面研磨装置の駆動装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for an in-hole surface polishing apparatus for polishing an in-hole surface such as a rotor bore bored in a steam turbine rotor.

【0002】[0002]

【従来の技術】従来、蒸気タービンロータの点検工事の
項目の一つにタービンロータの中心孔(以下、ロータボ
アと称する。)の内面検査がある。ロータの中心部は鍛
造時の鍛練効果が最も低いため、鍛造完了後に中心孔を
穿設して材質の内部検査が行われる。
2. Description of the Related Art Conventionally, one of the items of inspection work for a steam turbine rotor is an inner surface inspection of a central hole (hereinafter referred to as a rotor bore) of the turbine rotor. Since the center portion of the rotor has the lowest forging effect during forging, a center hole is bored after the forging is completed and an internal inspection of the material is performed.

【0003】蒸気タービンロータの運転中にはロータボ
アの内表面部分に最も大きな切線方向の応力が発生す
る。そのため、品質管理上蛍光探傷試験を主体とした検
査が行われる。ところが、このロータボアの内面には運
転中に酸化皮膜等が付着堆積し、そのまま検査を行うこ
とができず、予め、ロータボアの内面を清掃しておかな
ければならない。
During operation of the steam turbine rotor, the greatest tangential stress is generated in the inner surface portion of the rotor bore. Therefore, the inspection mainly based on the fluorescent flaw detection test is performed for quality control. However, an oxide film or the like adheres to and accumulates on the inner surface of the rotor bore during operation, and the inspection cannot be performed as it is. Therefore, the inner surface of the rotor bore must be cleaned in advance.

【0004】図5に従来の孔内表面研磨装置を示す。図
5に示すように、ロータボア11が穿設されたタービン
ロータ12は一対の受け台13によって支持されてい
る。そして、このタービンロータ12の両端部にはフラ
ンジ14によって案内治具としてのパイプガイド101
が取付けられ、円筒部102がフランジ103で連結さ
れ、ガイド治具104によって支持されている。また、
パイプガイド101には図示しない集塵機の配管105
が取付けられている。研磨ロボット106はロータボア
11にパイプガイド101によって挿入され、タービン
ロータ12の両側に設置された牽引装置107から引き
出されたワイヤロープ108が連結されている。
FIG. 5 shows a conventional polishing apparatus for a surface inside a hole. As shown in FIG. 5, the turbine rotor 12 having the rotor bore 11 formed therein is supported by a pair of pedestals 13. Then, the pipe guides 101 as guide jigs are provided on both ends of the turbine rotor 12 by the flanges 14.
Is attached, the cylindrical portion 102 is connected by a flange 103, and is supported by a guide jig 104. Also,
A pipe 105 of a dust collector (not shown) is provided on the pipe guide 101.
Is installed. The polishing robot 106 is inserted into the rotor bore 11 by the pipe guide 101, and the wire ropes 108 drawn from the pulling devices 107 installed on both sides of the turbine rotor 12 are connected to the polishing robot 106.

【0005】而して、タービンロータ12におけるロー
タボア11の内表面を研磨するには、まず、一対の受け
台13によって支持されたタービンロータ12に対して
研磨ロボット106をロータボア11にガイド治具10
4側からパイプガイド101により挿入する。そして、
次に、牽引装置107の図示しないモータを駆動してワ
イヤロープ108を牽引することにより、研磨ロボット
106がロータボア11内を移動して内表面を研磨す
る。
In order to polish the inner surface of the rotor bore 11 of the turbine rotor 12, first, the polishing robot 106 for the turbine rotor 12 supported by the pair of pedestals 13 is guided to the rotor bore 11 by the guide jig 10.
Insert from the 4 side by the pipe guide 101. And
Next, by driving a motor (not shown) of the traction device 107 to pull the wire rope 108, the polishing robot 106 moves inside the rotor bore 11 to polish the inner surface.

【0006】[0006]

【発明が解決しようとする課題】上述した従来の孔内表
面研磨装置にあっては、研磨ロボット106を牽引装置
107によりワイヤロープ108を介して牽引すること
によりロータボア11内を移動して内表面を研磨してい
る。そのため、支持されたタービンロータ12の両側に
牽引装置107を設置しなければならず、タービンロー
タ12の軸方向に長い作業スペースが必要となってしま
う。例えば、図5に示すように、研磨装置全体の設置及
び作業スペースをLとして牽引装置107等の設置スペ
ースをL1 ,L2 すると、L<L1 +L2 となっいるの
が現状である。従って、従来は牽引装置107等の設置
スペースが多く必要となって装置が大型化してしまい、
作業スペースの有効利用が図れないという問題があっ
た。
In the conventional hole surface polishing apparatus described above, the polishing robot 106 is pulled by the pulling device 107 via the wire rope 108 to move inside the rotor bore 11 to move the inner surface. Is being polished. Therefore, the traction devices 107 have to be installed on both sides of the supported turbine rotor 12, which requires a long working space in the axial direction of the turbine rotor 12. For example, as shown in FIG. 5, if the installation space of the entire polishing apparatus and the working space are L, and the installation spaces of the traction device 107 and the like are L 1 and L 2 , the current situation is L <L 1 + L 2 . Therefore, conventionally, a large installation space for the towing device 107 and the like is required, and the device becomes large,
There was a problem that the work space could not be effectively used.

【0007】また、従来の孔内表面研磨装置にあって
は、ロータボア11内の内表面を研磨する研磨ロボット
106の他にガイド治具104や牽引装置107などの
取付及び取外作業等が必要となって作業工数が増加して
作業能率が低下してしまうという問題があった。
Further, in the conventional hole surface polishing apparatus, in addition to the polishing robot 106 for polishing the inner surface of the rotor bore 11, it is necessary to attach and remove the guide jig 104, the traction device 107 and the like. Therefore, there is a problem that the work man-hour increases and the work efficiency decreases.

【0008】本発明はこのような問題点を解決するもの
であって、作業スペースの減少及び作業能率の向上を図
った孔内表面研磨装置の駆動装置を提供することを目的
とする。
The present invention has been made to solve the above problems, and an object of the present invention is to provide a driving device for an in-hole surface polishing apparatus that reduces the working space and improves the working efficiency.

【0009】[0009]

【課題を解決するための手段】上述の目的を達成するた
めの本発明の孔内表面研磨装置の駆動装置は、孔内に進
退自在に挿入されて該孔内表面を研磨する砥石を有する
孔内表面研磨装置において、装置本体に搭載された駆動
モータと、基端が装置本体に枢支された中空アームと、
該中空アームの先端部に装着された走行車輪と、前記中
空アーム内に装着されて前記駆動モータと走行車輪とを
駆動連結する複数の傘歯車からなる駆動力伝達機構と、
前記中空アームに連結されて該中空アームを揺動させる
揺動リンクとを具えたことを特徴とするものである。
In order to achieve the above-mentioned object, a driving device for a hole inner surface polishing apparatus of the present invention is a hole having a grindstone that is inserted into the hole so as to be capable of advancing and retracting and polishes the inner surface of the hole. In the inner surface polishing apparatus, a drive motor mounted on the apparatus main body, a hollow arm whose base end is pivotally supported by the apparatus main body,
A traveling wheel mounted on a tip portion of the hollow arm, and a driving force transmission mechanism including a plurality of bevel gears mounted in the hollow arm and drivingly connecting the drive motor and the traveling wheel,
And a swing link which is connected to the hollow arm and swings the hollow arm.

【0010】[0010]

【作用】砥石を有する装置本体を孔内に進退自在に挿入
し、揺動リンクによって中空アームを揺動させることで
先端部に装着された走行車輪を孔内表面に圧接させる。
この状態で、駆動モータを駆動すると、駆動力が複数の
傘歯車からなる駆動力伝達機構を介して走行車輪に伝達
され、走行車輪が駆動回転して装置本体は孔内を移動す
る。このときに、砥石を駆動することで孔内表面が研磨
される。
The main body of the apparatus having the grindstone is inserted into the hole so as to be able to move forward and backward, and the hollow arm is rocked by the rocking link to press the traveling wheel mounted on the tip end against the inner surface of the hole.
When the drive motor is driven in this state, the driving force is transmitted to the traveling wheels via the driving force transmission mechanism including a plurality of bevel gears, the traveling wheels are driven and rotated, and the device body moves in the hole. At this time, the inner surface of the hole is polished by driving the grindstone.

【0011】[0011]

【実施例】以下、図面に基づいて本発明の実施例を詳細
に説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0012】図1に本発明の一実施例に係る孔内表面研
磨装置の駆動装置の断面、図2に駆動力伝達機構の断
面、図3に図2のA−A断面、図4に駆動力伝達機構の
概略を示す。なお、従来と同様の機能を有する部材には
同一の符号を付して重複する説明は省略する。
FIG. 1 is a sectional view of a driving device of an in-hole surface polishing apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of a driving force transmission mechanism, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. The outline of a force transmission mechanism is shown. The members having the same functions as the conventional ones are designated by the same reference numerals, and the duplicated description will be omitted.

【0013】本実施例の孔内表面研磨装置において、図
1に示すように、中空の接続筒21の先端内部にはグラ
インダ旋回用モータ22が装着され、そのモータ22の
出力軸に固結されたピニオン23は中間ギア24を介し
て駆動軸25に駆動連結されている。そして、この駆動
軸25には図示しないロータボア11内の内表面を研磨
する研磨グラインダが装着されている。一方、接続筒2
1の基端内部には図示しないエア供給源に接続されたエ
アホース26と加工送り・早送り切換用ソレノイド27
及び給電ケーブル28が連結されている。
In the hole surface polishing apparatus of this embodiment, as shown in FIG. 1, a grinder turning motor 22 is mounted inside the tip of a hollow connecting cylinder 21, and is fixed to the output shaft of the motor 22. The pinion 23 is drivingly connected to a drive shaft 25 via an intermediate gear 24. A polishing grinder (not shown) for polishing the inner surface of the rotor bore 11 is attached to the drive shaft 25. On the other hand, the connecting tube 2
Inside the base end of No. 1, an air hose 26 connected to an air supply source (not shown) and a machining feed / rapid feed switching solenoid 27.
And a power supply cable 28 are connected.

【0014】また、接続筒21内には研磨装置をロータ
ボア11内で移動させる駆動装置31,32が装着され
ている。なお、駆動装置31,32はほぼ同様の構造を
なしているため、一方の駆動装置31についてのみ詳細
に説明し、駆動装置32については同一の符号を付して
重複する説明は省略する。
Further, drive devices 31, 32 for moving the polishing device in the rotor bore 11 are mounted in the connecting cylinder 21. Since the driving devices 31 and 32 have substantially the same structure, only one driving device 31 will be described in detail, and the driving device 32 will be denoted by the same reference numeral and redundant description will be omitted.

【0015】接続筒21の内壁面にはシリンダ33が固
定され、このシリンダ33内には二重のピストン34,
35が移動自在に嵌合し、それぞれ圧縮空気を供給する
部屋34a,34b,35a,35bが形成されてい
る。また、ピストン34に隣接して固定壁36が形成さ
れており、この固定壁36の一方側には走行加工送り用
モータ37が装着され、他方側には駆動力伝達機構38
及び複数の中空アーム39を介して走行車輪40が装着
されている。そして、この中空アーム39の中間部と前
述したピストン34とは揺動リンク41によって連結さ
れている。
A cylinder 33 is fixed to the inner wall surface of the connecting cylinder 21, and a double piston 34,
35 are movably fitted, and chambers 34a, 34b, 35a, 35b for supplying compressed air are formed. A fixed wall 36 is formed adjacent to the piston 34. A traveling machining feed motor 37 is mounted on one side of the fixed wall 36, and a driving force transmission mechanism 38 is mounted on the other side.
A traveling wheel 40 is mounted via a plurality of hollow arms 39. The intermediate portion of the hollow arm 39 and the piston 34 described above are connected by a swing link 41.

【0016】また、ピストン35に隣接して固定壁42
が形成されており、この固定壁42の一方側には走行加
工送り用モータ43が装着され、他方側には駆動力伝達
機構44及び複数の中空アーム45を介して走行車輪4
6が装着されている。そして、この中空アーム45の中
間部と前述したピストン35とは揺動リンク47によっ
て連結されている。なお、接続筒21における各走行車
輪40,46に対応した位置にはそれぞれ開口部48,
49が形成されている。
A fixed wall 42 is provided adjacent to the piston 35.
The running wheel 4 is mounted on one side of the fixed wall 42, and the running wheel 4 is mounted on the other side via the driving force transmission mechanism 44 and a plurality of hollow arms 45.
6 is installed. The intermediate portion of the hollow arm 45 and the piston 35 described above are connected by a swing link 47. It should be noted that at the positions corresponding to the traveling wheels 40, 46 on the connecting cylinder 21, the openings 48,
49 is formed.

【0017】ここで、駆動力伝達機構38,44につい
て説明するが、両者共ほぼ同様の構造をなしているた
め、一方についてのみ説明する。図2乃至図4に示すよ
うに、駆動力伝達機構38において、走行加工送り用モ
ータ37の出力軸に固結されたスパーギア51はインタ
ーナルギア52に噛み合っており、このインターナルギ
ア52と同軸上に固結されたスパーギア53にはスパー
ギア54が噛み合っている。更に、スパーギア54と同
軸上に第1傘歯車55が一体回転可能に固結され、第1
傘歯車55には第2乃至第5傘歯車56,57,58,
59がそれぞれ順次駆動連結されており、第5傘歯車5
9には走行車輪40が固定されている。なお、第1乃至
第5傘歯車55,56,57,58,59は中空アーム
39内に位置している。
Here, the driving force transmission mechanisms 38 and 44 will be described, but since both have substantially the same structure, only one will be described. As shown in FIGS. 2 to 4, in the driving force transmission mechanism 38, the spur gear 51 fixed to the output shaft of the traveling / working feed motor 37 is meshed with the internal gear 52, and is coaxial with the internal gear 52. A spur gear 54 is meshed with the spur gear 53 that is solidified. Further, the first bevel gear 55 is coaxially fixed to the spur gear 54 so as to be integrally rotatable.
The bevel gear 55 includes second to fifth bevel gears 56, 57, 58,
59 are sequentially driven and connected, and the fifth bevel gear 5
A traveling wheel 40 is fixed to 9. The first to fifth bevel gears 55, 56, 57, 58, 59 are located inside the hollow arm 39.

【0018】而して、タービンロータ12におけるロー
タボア11の内表面を研磨するには、本実施例の研磨装
置をロータボア11内に挿入し、まず、エアホース26
からシリンダ33の部屋34a,35a内に圧縮空気を
供給し、各ピストン34,35を作動させる。即ち、図
1においてピストン34は左方へ、ピストン35は右方
へ移動して各揺動リンク41,47を起立させ、各中空
アーム39,45を回動させる。すると、各中空アーム
39,45の先端部に装着された走行車輪40,46が
接続筒21の開口48,49から径方向外方に突出し、
ロータボア11の内表面に圧接される。なお、各中空ア
ーム39,45は、図4に示すように、傾斜角度θを変
化させながら回動するが、このときに第2傘歯車56と
第3傘歯車57との噛み合い位置が変わることで追従す
る。
In order to polish the inner surface of the rotor bore 11 of the turbine rotor 12, the polishing apparatus of this embodiment is inserted into the rotor bore 11, and the air hose 26 is first used.
To supply the compressed air into the chambers 34a and 35a of the cylinder 33 to operate the pistons 34 and 35. That is, in FIG. 1, the piston 34 moves to the left and the piston 35 moves to the right to raise the rocking links 41 and 47 and rotate the hollow arms 39 and 45. Then, the traveling wheels 40, 46 mounted on the tip end portions of the hollow arms 39, 45 project radially outward from the openings 48, 49 of the connection cylinder 21,
It is pressed against the inner surface of the rotor bore 11. As shown in FIG. 4, the hollow arms 39 and 45 rotate while changing the inclination angle θ, but at this time, the meshing position of the second bevel gear 56 and the third bevel gear 57 changes. Follow with.

【0019】次に、この状態から走行加工送り用モータ
37を駆動すると、その駆動力が各ギア51,52,5
3,54及び第1乃至第5傘歯車55,56,57,5
8,59を介して各走行車輪40,46に伝達され、こ
の走行車輪40,46が駆動回転して研磨装置(接続筒
21)はロータボア11内を移動する。このときに、グ
ラインダ旋回用モータ22によって研磨グラインダを駆
動することでロータボア11の内表面が研磨される。
Next, when the traveling / working feed motor 37 is driven from this state, the driving force is applied to the respective gears 51, 52, 5
3, 54 and first to fifth bevel gears 55, 56, 57, 5
The traveling wheels 40 and 46 are transmitted to the traveling wheels 40 and 46 via 8, 59, and the traveling wheels 40 and 46 are driven and rotated to move the polishing device (the connecting cylinder 21) in the rotor bore 11. At this time, the inner surface of the rotor bore 11 is polished by driving the polishing grinder by the grinder turning motor 22.

【0020】[0020]

【発明の効果】以上、実施例を挙げて詳細に説明したよ
うに本発明の孔内表面研磨装置の駆動装置によれば、孔
内に進退自在に挿入されて孔内表面を研磨する砥石を有
する孔内表面研磨装置本体に駆動モータと中空アームと
中空アームの先端部に装着された走行車輪と中空アーム
内に装着されて駆動モータの駆動力を走行車輪に伝達す
る複数の傘歯車からなる駆動力伝達機構と中空アームに
連結されてこの中空アームを揺動させる揺動リンクとを
設けたので、従来、研磨装置とは別に設けていた牽引装
置を不要として装置の小型化を図ることができると共に
作業スペースを減少させて作業場所に限定されることが
なくなった。また、周辺機器の取付及び取外し作業が不
要となって作業工数が低減し、作業能率の向上を図るこ
とができる。
As described above in detail with reference to the embodiments, according to the driving device for the hole inner surface polishing apparatus of the present invention, a grindstone that is inserted into the hole so as to advance and retreat to polish the inner surface of the hole is provided. The hole inner surface polishing apparatus has a drive motor, a hollow arm, a traveling wheel mounted on the distal end of the hollow arm, and a plurality of bevel gears mounted in the hollow arm for transmitting the driving force of the drive motor to the traveling wheel. Since the driving force transmission mechanism and the swinging link that is connected to the hollow arm and swings the hollow arm are provided, it is possible to reduce the size of the device by eliminating the need for a traction device that is conventionally provided separately from the polishing device. As well as being able to do so, the work space has been reduced, and it is no longer limited to the work place. Further, the work of attaching and detaching the peripheral device is not required, and the work man-hour is reduced, and the work efficiency can be improved.

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

【図1】本発明の一実施例に係る孔内表面研磨装置の駆
動装置の断面図である。
FIG. 1 is a cross-sectional view of a drive unit of an in-hole surface polishing apparatus according to an embodiment of the present invention.

【図2】駆動力伝達機構の断面図である。FIG. 2 is a sectional view of a driving force transmission mechanism.

【図3】図2のA−A断面図である。3 is a cross-sectional view taken along the line AA of FIG.

【図4】駆動力伝達機構の概略図である。FIG. 4 is a schematic view of a driving force transmission mechanism.

【図5】従来の孔内表面研磨装置図である。FIG. 5 is a view of a conventional hole surface polishing apparatus.

【符号の説明】[Explanation of symbols]

11 ロータボア 12 タービンロータ 21 接続筒 22 グラインダ旋回用モータ 31,32 駆動装置 33 シリンダ 34,35 ピストン 37,43 走行加工送り用モータ 38,44 駆動力伝達機構 39,45 中空アーム 40,46 走行車輪 41,47 揺動リンク 55,56,57,58,59 傘歯車 11 Rotor Bore 12 Turbine Rotor 21 Connection Cylinder 22 Grinder Turning Motor 31, 32 Drive Device 33 Cylinder 34, 35 Piston 37, 43 Traveling Work Feed Motor 38, 44 Drive Force Transmission Mechanism 39, 45 Hollow Arm 40, 46 Travel Wheel 41 , 47 Swing link 55, 56, 57, 58, 59 Bevel gear

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 孔内に進退自在に挿入されて該孔内表面
を研磨する砥石を有する孔内表面研磨装置において、装
置本体に搭載された駆動モータと、基端が装置本体に枢
支された中空アームと、該中空アームの先端部に装着さ
れた走行車輪と、前記中空アーム内に装着されて前記駆
動モータと走行車輪とを駆動連結する複数の傘歯車から
なる駆動力伝達機構と、前記中空アームに連結されて該
中空アームを揺動させる揺動リンクとを具えたことを特
徴とする孔内表面研磨装置の駆動装置。
1. A hole inner surface polishing apparatus having a grindstone that is inserted into a hole so as to be capable of advancing and retracting and polishes an inner surface of the hole. A drive motor mounted on the apparatus body and a base end thereof are pivotally supported on the apparatus body. A hollow arm, a traveling wheel mounted on a distal end portion of the hollow arm, and a driving force transmission mechanism including a plurality of bevel gears mounted in the hollow arm and drivingly connecting the drive motor and the traveling wheel, A driving device for a hole inner surface polishing apparatus, comprising: a swing link connected to the hollow arm to swing the hollow arm.
JP33067491A 1991-12-13 1991-12-13 Drive device of hole inner surface polishing unit Withdrawn JPH05162061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33067491A JPH05162061A (en) 1991-12-13 1991-12-13 Drive device of hole inner surface polishing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33067491A JPH05162061A (en) 1991-12-13 1991-12-13 Drive device of hole inner surface polishing unit

Publications (1)

Publication Number Publication Date
JPH05162061A true JPH05162061A (en) 1993-06-29

Family

ID=18235321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33067491A Withdrawn JPH05162061A (en) 1991-12-13 1991-12-13 Drive device of hole inner surface polishing unit

Country Status (1)

Country Link
JP (1) JPH05162061A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013052741A (en) * 2011-09-02 2013-03-21 Nippon Steel & Sumitomo Metal Corp In-pipe traveling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013052741A (en) * 2011-09-02 2013-03-21 Nippon Steel & Sumitomo Metal Corp In-pipe traveling device

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