JPH07299716A - Pipe inside projection removing device - Google Patents
Pipe inside projection removing deviceInfo
- Publication number
- JPH07299716A JPH07299716A JP11022294A JP11022294A JPH07299716A JP H07299716 A JPH07299716 A JP H07299716A JP 11022294 A JP11022294 A JP 11022294A JP 11022294 A JP11022294 A JP 11022294A JP H07299716 A JPH07299716 A JP H07299716A
- Authority
- JP
- Japan
- Prior art keywords
- centering mechanism
- rotary shaft
- pipe
- shaft
- grinder
- 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- Withdrawn
Links
Landscapes
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、配管の溶接継手部に
付着された裏当金(バックリング)などの管内凸部を削
除する手段に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a means for removing a convex portion in a pipe such as a backing metal (back ring) attached to a welded joint portion of a pipe.
【0002】[0002]
【従来の技術】発電所,プラントなどの施設に配設され
る大形の配管を溶接接合するとき溶接継手部の管内側に
裏当金を付設して溶接を行うが、従来、この裏当金は溶
接継手部の管内側に付着したままにされている。2. Description of the Related Art When welding large-sized pipes installed in facilities such as power plants and plants, a backing metal is attached to the inside of the welded joint to perform welding. The gold remains attached to the inside of the tube at the weld joint.
【0003】[0003]
【発明が解決しようとする課題】従来は上記のように裏
当金は管内側に付着したままとなっているが、運用中に
腐食などにより裏当金が外れて管内を流れると重大事故
が発生するおそれがあるので、裏当金は除去することが
望ましいというような課題があった。Conventionally, the backing metal remains attached to the inside of the pipe as described above, but if the backing metal comes off and flows inside the pipe due to corrosion during operation, a serious accident will occur. There is a problem that it is desirable to remove the backing metal because it may occur.
【0004】この発明は上記課題を解消するためになさ
れたもので、裏当金などの管内凸部を完全に削除するこ
とができる管内凸部削除装置を得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 obtain an in-tube convex portion removing device capable of completely removing an in-tube convex portion such as a backing metal.
【0005】[0005]
【課題を解決するための手段】この発明に係る管内凸部
削除装置は、半径方向に伸縮調節設定可能な各3本の伸
縮脚を有する前部調心機構及び後部調心機構と、この両
調心機構に支持される回転軸に取り付けられて中心を検
出する心出し機構と、前記両調心機構に支持されて前記
回転軸の軸心線のまわりに回動可能に設けられた研削工
具と、この研削工具を前記回転軸の軸心線に垂直な方向
に移動させる送り機構とからなるものである。SUMMARY OF THE INVENTION An in-pipe convex portion removing device according to the present invention includes a front centering mechanism and a rear centering mechanism each having three telescopic legs that can be set to be telescopically adjusted in the radial direction. A centering mechanism that is attached to a rotating shaft that is supported by an aligning mechanism to detect the center, and a grinding tool that is supported by both of the aligning mechanisms and is rotatable around the axis of the rotating shaft. And a feed mechanism for moving the grinding tool in a direction perpendicular to the axis of the rotary shaft.
【0006】[0006]
【作用】この発明における管内凸部削除装置を管内に仮
設し、前部調心機構及び後部調心機構に支持される回転
軸に取り付けられた心出し機構を回転させて中心を検出
し、検出された中心に合わせるように両調心機構の各3
本の伸縮脚を半径方向に伸縮調節設定すれば、前記回転
軸が中心線に設定される。この両調心機構に支持された
研削工具を、回転軸の軸心線のまわりに回動させなが
ら、送り機構により回転軸の軸心線に垂直な方向に送れ
ば、研削工具は管内凸部に当接して研削し削除する。こ
れにより、管内面を正確な円形形状に削成することがで
きる。The pipe convex portion removing device according to the present invention is temporarily installed in the pipe, and the centering mechanism attached to the rotary shaft supported by the front centering mechanism and the rear centering mechanism is rotated to detect and detect the center. Each of the two centering mechanisms to match the center
When the telescopic legs of the book are set to be telescopically adjusted in the radial direction, the rotation axis is set to the center line. If the grinding tool supported by these two centering mechanisms is rotated around the axis of the rotary shaft while being fed by the feed mechanism in the direction perpendicular to the axis of the rotary shaft, the grinding tool will be Abut and grind to remove. As a result, the inner surface of the pipe can be cut into an accurate circular shape.
【0007】[0007]
【実施例】以下、この発明の一実施例を図について説明
する。図1はこの発明の一実施例による管内凸部削除装
置を示し、(A)は縦断面図、(B)は前部調心機構の
付近の横断面図、(C)は中央部の横断面図である。図
において、10は配管などの管体であり、段違い口径と
なっている。この段違い接続管体と通常の管体とを接続
する溶接部の管内周面には、溶接施工前に施した裏当金
20が溶着して残存している。この管内凸部削除装置は
裏当金20のような管内凸部を削除するための装置であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B show a device for removing a convex portion in a pipe according to an embodiment of the present invention, wherein FIG. 1A is a longitudinal sectional view, FIG. 1B is a lateral sectional view near a front centering mechanism, and FIG. It is a side view. In the figure, 10 is a pipe body such as a pipe having a different diameter. A backing metal 20 applied before welding is left on the inner peripheral surface of the pipe at the welded portion for connecting the step connection pipe and the normal pipe. This in-pipe convex portion removing device is an apparatus for eliminating an in-pipe convex portion such as the backing plate 20.
【0008】図において、30は前部調心機構、40は
後部調心機構であり、各3本の伸縮脚31,41を有し
ている。伸縮脚31,41は、前部調心機構30又は後
部調心機構40の中心部から120度間隔で放射状に延
びるように取り付けられ、伸縮脚31,41は種々の異
なる径の管に適用可能なように各種の長さのものが用意
されており、伸縮脚31,41はねじにより半径方向突
出長さを伸縮して調節設定可能である。前部調心機構3
0及び後部調心機構40の中心を通して回転軸50が設
けられている。回転軸50には心出し機構90が着設さ
れており、心出し機構90には伸縮可能な突子92が回
転軸50の中心線に垂直方向に延びるように設けられて
おり、突子92は心出し機構90の中心すなわち回転軸
50の中心から突子92の先端までの距離を検出する。
したがって、回転軸50を回転させて突子92の向きを
変えて、突子92の先端を管体10又は裏当金20の内
面に当てて各方向の距離を検出すれば中心の位置を検出
することができる。In the figure, 30 is a front centering mechanism and 40 is a rear centering mechanism, each having three telescopic legs 31, 41. The telescopic legs 31 and 41 are attached so as to extend radially from the center of the front centering mechanism 30 or the rear centering mechanism 40 at intervals of 120 degrees, and the telescopic legs 31 and 41 are applicable to pipes of various different diameters. As described above, various lengths are prepared, and the telescopic legs 31 and 41 can be adjusted and set by expanding and contracting the radial protruding length with a screw. Front centering mechanism 3
A rotary shaft 50 is provided through the center of the zero and rear centering mechanism 40. A centering mechanism 90 is attached to the rotating shaft 50, and an extendable and retractable protrusion 92 is provided on the centering mechanism 90 so as to extend in a direction perpendicular to the center line of the rotating shaft 50. Detects the distance from the center of the centering mechanism 90, that is, the center of the rotating shaft 50 to the tip of the protrusion 92.
Therefore, by rotating the rotary shaft 50 to change the direction of the protrusion 92, the tip of the protrusion 92 is brought into contact with the inner surface of the tubular body 10 or the backing metal 20, and the distance in each direction is detected to detect the center position. can do.
【0009】図において、60はグラインダであり、グ
ラインダ60の回転駆動部62はグラインダ支持枠86
に取り付けられており、グラインダ支持枠86は案内8
7を介して全体回転部材55に図の上下方向に移動可能
に設けられている。全体回転部材55の図の右部は全体
回転軸受45により後部調心機構40に回動可能に支持
され、回転軸50を介して前部調心機構30にも支持さ
れている。全体回転部材55の回転中心線は回転軸50
の回転中心線と同一で、前部調心機構30の中心と後部
調心機構40の中心とを結ぶ線となっている。In the figure, reference numeral 60 is a grinder, and a rotary drive unit 62 of the grinder 60 is a grinder support frame 86.
The grinder support frame 86 is attached to the guide 8
It is provided on the entire rotating member 55 via 7 so as to be movable in the vertical direction in the figure. The right portion of the whole rotary member 55 in the figure is rotatably supported by the rear centering mechanism 40 by the whole rotary bearing 45, and is also supported by the front centering mechanism 30 via the rotary shaft 50. The rotation center line of the entire rotation member 55 is the rotation shaft 50.
It is the same as the rotation center line of No. 1 and connects the center of the front centering mechanism 30 and the center of the rear centering mechanism 40.
【0010】送り機構80として、全体回転部材55に
は中心線に垂直方向(図の中央部上方)に回転可能にね
じ軸85が設けられ、ねじ軸85には大傘歯車83が固
着されている。また、全体回転部材55に軸方向に回転
駆動軸81が回転可能に設けられ、回転駆動軸81の図
の右端には回転駆動用ハンドルが取り付けられるように
ハンドル嵌着部81cが形成されており、回転駆動軸8
1の図の左端には大傘歯車83に噛み合う小傘歯車82
が固着されている。ねじ軸85の図の上部には雄ねじが
形成されており、グラインダ支持枠86の図の上辺部材
にはねじ軸85の雄ねじに螺合するねじ穴が形成されて
螺嵌している。したがって、グラインダ60を支持する
グラインダ支持枠86は、ねじ軸85を介して全体回転
部材55に支持され、回転駆動軸81によりねじ軸85
を回転させればグラインダ支持枠86は図の上下方向に
移動する機構となっている。As the feed mechanism 80, a screw shaft 85 is provided on the entire rotary member 55 so as to be rotatable in the direction perpendicular to the center line (upper central portion in the drawing), and a large bevel gear 83 is fixed to the screw shaft 85. There is. A rotary drive shaft 81 is rotatably provided in the entire rotary member 55 in the axial direction, and a handle fitting portion 81c is formed at the right end of the rotary drive shaft 81 in the drawing so that a rotary drive handle can be attached. , Rotary drive shaft 8
A small bevel gear 82 meshing with the large bevel gear 83 is provided at the left end of the drawing of FIG.
Is stuck. A male screw is formed on the upper portion of the screw shaft 85 in the drawing, and a screw hole to be screwed into the male screw of the screw shaft 85 is formed and screwed into the upper side member of the grinder support frame 86 in the drawing. Therefore, the grinder support frame 86 that supports the grinder 60 is supported by the entire rotating member 55 via the screw shaft 85, and is rotated by the rotary drive shaft 81.
When is rotated, the grinder support frame 86 is a mechanism that moves in the vertical direction in the figure.
【0011】なお、70は吸引管系であり、吸入口はグ
ラインダ60の回転砥石61の付近に開口し、図の右方
は図示しない吸引ポンプ等に接続されている。また、グ
ラインダ60の回転駆動部62には図の右方に図示しな
い電力源又は圧縮空気源が接続されている。A suction pipe system 70 has a suction port opened near the rotary grindstone 61 of the grinder 60, and the right side of the drawing is connected to a suction pump or the like (not shown). Further, a power source or a compressed air source (not shown) is connected to the right side of the drawing to the rotary drive unit 62 of the grinder 60.
【0012】次に、図に示す実施例の動作について説明
する。先ず、この管内凸部削除装置を所要の管内に設置
する手順について説明する。前部調心機構30及び後部
調心機構40の各3本の伸縮脚31,41を短縮させた
状態で管体10内に挿入し、心出し機構90の突子92
が削除すべき裏当金20の箇所に位置するように軸方向
の位置を決め、各3本の伸縮脚31,41を伸長させ、
先端を管体10の内面に当接させて概略の中心位置に仮
設する。次に、回転軸50を回転させて心出し機構90
の突子92の角度位置を3方向以上に変えて、各方向に
おける中心から裏当金20の内周面までの距離を検出
し、その各距離の差に応じて3本の伸縮脚31を回して
その突出量を変更して中心を合わせる。また、心出し機
構90を中心線のまわりに回転させたとき、突子92の
先端が裏当金20の内周面の軸方向中央部に全周にわた
ってなるように、3本の41を伸縮させて調整する。以
上のように、伸縮脚31,41による調整により、回転
軸50及び全体回転部材55の中心線、すなわち、この
管内凸部削除装置の中心線が設定された。また、グライ
ンダ60の回転砥石61の軸方向位置は心出し機構90
の軸方向位置と一致するように設けられているので、回
転砥石61の軸方向位置が裏当金20の軸方向位置に一
致した。Next, the operation of the embodiment shown in the figure will be described. First, a procedure for installing the in-tube convex portion removing device in a desired tube will be described. Each of the three telescopic legs 31 and 41 of the front centering mechanism 30 and the rear centering mechanism 40 is inserted into the tubular body 10 in a shortened state, and the protrusion 92 of the centering mechanism 90 is inserted.
Axial position is determined so that it is located on the backing metal 20 to be deleted, and each of the three telescopic legs 31 and 41 is extended,
The tip is brought into contact with the inner surface of the tubular body 10 and temporarily provided at the approximate center position. Next, the rotating shaft 50 is rotated to rotate the centering mechanism 90.
By changing the angular position of the projecting member 92 in three or more directions, the distance from the center in each direction to the inner peripheral surface of the backing plate 20 is detected, and the three telescopic legs 31 are moved according to the difference in each distance. Turn to change the amount of protrusion and adjust the center. Further, when the centering mechanism 90 is rotated around the center line, the three 41 are expanded and contracted so that the tip of the protrusion 92 extends over the entire circumference at the axial center of the inner peripheral surface of the backing plate 20. And adjust. As described above, the centerlines of the rotary shaft 50 and the entire rotary member 55, that is, the centerlines of the in-tube convex portion removing device are set by the adjustment using the telescopic legs 31 and 41. Further, the axial position of the rotary grindstone 61 of the grinder 60 is the centering mechanism 90.
Since it is provided so as to coincide with the axial position of, the axial position of the rotary grindstone 61 coincides with the axial position of the backing plate 20.
【0013】次に、中心線寄りに引き上げておいたグラ
インダ60の回転駆動部62に電力又は圧縮空気を送っ
て回転砥石61を回転させながら、図の下方に下げるよ
うに送り操作をする。送り操作は、ハンドル嵌着部81
cにハンドルを嵌着して回転駆動軸81を回して、小傘
歯車82から大傘歯車83を介してねじ軸85を回転さ
せると、ねじ軸85の雄ねじに螺合するグラインダ支持
枠86のねじ穴に下向きの力がかかり、グラインダ支持
枠86を押し下げ、これに取り付けられたグラインダ6
0を押し下げる。グラインダ60の回転している回転砥
石61が裏当金20に接触すれば、裏当金20の内周面
が研削される。全体回転部材55を回転させてグライン
ダ60を回転させながら裏当金20の研削を全周に行う
ことにより、真円形状に研削して裏当金20を完全に削
除することができる。Next, electric power or compressed air is sent to the rotary drive unit 62 of the grinder 60 that has been pulled up toward the center line to rotate the rotary grindstone 61, and the feed operation is performed so as to lower it in the figure. The feed operation is performed by the handle fitting portion 81.
When the handle is fitted to c and the rotary drive shaft 81 is rotated to rotate the screw shaft 85 from the small bevel gear 82 via the large bevel gear 83, the grinder support frame 86 of the grinder support frame 86 screwed to the male screw of the screw shaft 85 is rotated. A downward force is applied to the screw holes to push down the grinder support frame 86, and the grinder 6 attached to the grinder support frame 86 is pushed down.
Push 0 down. When the rotating grindstone 61 of the grinder 60 contacts the backing plate 20, the inner peripheral surface of the backing plate 20 is ground. By grinding the backing metal 20 over the entire circumference while rotating the entire rotating member 55 and rotating the grinder 60, the backing metal 20 can be completely removed by grinding the backing metal 20.
【0014】裏当金20の研削削除が完了した後、回転
駆動軸81を回してグラインダ60を図の上方へ引き上
げ、伸縮脚31,41を短縮させて、この管内凸部削除
装置を取り出す。なお、この研削作業中に、研削屑を吸
引管系70によって吸入収集させれば、環境の汚染を防
止することができる。After the grinding and removing of the backing metal 20 is completed, the rotary drive shaft 81 is rotated to pull up the grinder 60 to the upper side of the drawing, and the telescopic legs 31 and 41 are shortened to take out the pipe convexity removing device. During this grinding operation, if the grinding dust is sucked and collected by the suction pipe system 70, environmental pollution can be prevented.
【0015】なお、前記実施例の図面及び説明では、研
削工具としてグラインダ60を用いたが、グラインダ6
0の代わりに可搬の平フライスなどの工具をグラインダ
支持枠86に取り付けて用いることもできる。また、送
り機構80等の構成は適宜設計変更することができる。Although the grinder 60 is used as the grinding tool in the drawings and the description of the embodiment, the grinder 6
Instead of 0, a tool such as a portable flat milling cutter can be attached to the grinder support frame 86 and used. Further, the design of the feeding mechanism 80 and the like can be appropriately changed.
【0016】[0016]
【発明の効果】以上のように、この発明によれば、心出
し機構及び両調心機構によって中心線を設定し、研削工
具をこの中心線のまわりに回転させながら研削するよう
にしたので、管内凸部を完全に削除して正確な円筒内面
に削成することができる。As described above, according to the present invention, the center line is set by the centering mechanism and the both-centering mechanism, and the grinding tool is ground while rotating around the center line. It is possible to completely remove the convex portion in the pipe and machine it to an accurate inner surface of the cylinder.
【図1】この発明の一実施例による管内凸部削除装置を
示し、(A)は縦断面図、(B)は前部調心機構付近の
横断面図、(C)は中央部の横断面図である。1A and 1B show a device for removing a convex portion in a pipe according to an embodiment of the present invention, wherein FIG. 1A is a longitudinal sectional view, FIG. 1B is a lateral sectional view near the front centering mechanism, and FIG. It is a side view.
10:管体、 20:裏当金、30:前部調心機構、
31:伸縮脚、40:後部調心機構、 41:伸縮脚、
50:回転軸、 55:全体回転部材、60:グライン
ダ、 61:回転砥石、70:吸引管系、 80:送り
機構、90:心出し機構、 92:突子。10: tubular body, 20: back metal, 30: front centering mechanism,
31: telescopic leg, 40: rear centering mechanism, 41: telescopic leg,
50: rotating shaft, 55: whole rotating member, 60: grinder, 61: rotating grindstone, 70: suction pipe system, 80: feed mechanism, 90: centering mechanism, 92: protrusion.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉田 和豊 神戸市兵庫区和田宮通7丁目1番14号 西 菱エンジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Katoyo Yoshida 7-1-14 Wadamiyadori, Hyogo-ku, Kobe Nishibishi Engineering Co., Ltd.
Claims (1)
伸縮脚を有する前部調心機構及び後部調心機構と、この
両調心機構に支持される回転軸に取り付けられて中心を
検出する心出し機構と、前記両調心機構に支持されて前
記回転軸の軸心線のまわりに回動可能に設けられた研削
工具と、この研削工具を前記回転軸の軸心線に垂直な方
向に移動させる送り機構とからなる管内凸部削除装置。1. A front centering mechanism and a rear centering mechanism each having three telescoping legs that can be set to expand and contract in a radial direction, and a center attached to a rotary shaft supported by the both centering mechanisms. A centering mechanism for detecting, a grinding tool supported by the both aligning mechanisms and rotatably provided around the axis of the rotary shaft, and the grinding tool perpendicular to the axis of the rotary shaft. In-tube convex part removal device consisting of a feed mechanism that moves in different directions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11022294A JPH07299716A (en) | 1994-04-27 | 1994-04-27 | Pipe inside projection removing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11022294A JPH07299716A (en) | 1994-04-27 | 1994-04-27 | Pipe inside projection removing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07299716A true JPH07299716A (en) | 1995-11-14 |
Family
ID=14530185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11022294A Withdrawn JPH07299716A (en) | 1994-04-27 | 1994-04-27 | Pipe inside projection removing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07299716A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104889872A (en) * | 2014-03-08 | 2015-09-09 | 吴鹏志 | Bracket type inner circle finish grinding and polishing machine |
CN106938512A (en) * | 2017-03-30 | 2017-07-11 | 克拉玛依市博瑞科技发展有限公司 | Annular projection flange eliminates device at polyethylene pipe internal weld seams |
CN113146397A (en) * | 2021-04-07 | 2021-07-23 | 安徽世林玻璃器皿有限公司 | Cosmetic bottle processing equipment of polishing |
WO2022007106A1 (en) * | 2020-07-08 | 2022-01-13 | 南京神源生智能科技有限公司 | Automatic grinding device for circumferential seam of capsule body |
CN115008276A (en) * | 2022-07-27 | 2022-09-06 | 江苏扬阳化工设备制造有限公司 | Pressure vessel grinding device |
-
1994
- 1994-04-27 JP JP11022294A patent/JPH07299716A/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104889872A (en) * | 2014-03-08 | 2015-09-09 | 吴鹏志 | Bracket type inner circle finish grinding and polishing machine |
CN104889872B (en) * | 2014-03-08 | 2017-07-11 | 吴鹏志 | Stent-type inner circle fine grinding polishing machine |
CN106938512A (en) * | 2017-03-30 | 2017-07-11 | 克拉玛依市博瑞科技发展有限公司 | Annular projection flange eliminates device at polyethylene pipe internal weld seams |
WO2022007106A1 (en) * | 2020-07-08 | 2022-01-13 | 南京神源生智能科技有限公司 | Automatic grinding device for circumferential seam of capsule body |
CN113146397A (en) * | 2021-04-07 | 2021-07-23 | 安徽世林玻璃器皿有限公司 | Cosmetic bottle processing equipment of polishing |
CN113146397B (en) * | 2021-04-07 | 2024-04-26 | 安徽世林玻璃器皿有限公司 | Cosmetic bottle processing equipment of polishing |
CN115008276A (en) * | 2022-07-27 | 2022-09-06 | 江苏扬阳化工设备制造有限公司 | Pressure vessel grinding device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0313001B2 (en) | ||
JPS63268519A (en) | Method and device for molding collar section of pipe end section | |
CA2984297A1 (en) | Pipe end truing apparatus and method | |
CN212858407U (en) | Pipeline and flange welding frock | |
CN114850743B (en) | Bevel pipe welding equipment | |
JPS5834231B2 (en) | Manufacturing equipment for tube centering parts | |
JPH07299716A (en) | Pipe inside projection removing device | |
US3711076A (en) | Pipe cutting machine | |
CN111195844B (en) | Rotary driving device and rotary driving method for polishing steering wheel | |
FR2629250A1 (en) | THREADED HOLES CLEANING MACHINE, IN PARTICULAR THREADED HOLES FOR THE PUNCH HOLE AND HOLES HOLE OF STEAM GENERATORS OF NUCLEAR POWER PLANTS | |
JPH06114706A (en) | Grinding device for bead in pipe | |
US4622873A (en) | Semi-automatic valve tool | |
JPH0790921A (en) | Cleaning device in running water for pipe line | |
JP3238585B2 (en) | Pipe propulsion mount | |
JP3838690B2 (en) | Electric tube expansion tool | |
US2694278A (en) | Grinding device for removing weld chill rings from header interiors | |
US4307593A (en) | Apparatus for forming collars around openings in tubes or plates | |
CN108817669B (en) | Pneumatic device for multi-station laser welding robot | |
KR100578474B1 (en) | Automatic elbow cutting machine having sub jig | |
JPH04111711A (en) | Pipe cutting device | |
JP2005103627A (en) | Pipe cutting machine | |
JPS5926390B2 (en) | Encyclopedia of construction | |
JP2795606B2 (en) | Roll changing device in straightening machine | |
CN217223988U (en) | Pipeline cutting device | |
JPS639925B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010703 |