JPS623881A - Two point simultaneous welding equipment for flange of straight pipe - Google Patents

Two point simultaneous welding equipment for flange of straight pipe

Info

Publication number
JPS623881A
JPS623881A JP14327285A JP14327285A JPS623881A JP S623881 A JPS623881 A JP S623881A JP 14327285 A JP14327285 A JP 14327285A JP 14327285 A JP14327285 A JP 14327285A JP S623881 A JPS623881 A JP S623881A
Authority
JP
Japan
Prior art keywords
welding
flange
torch
hydraulic cylinder
positioning
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
Application number
JP14327285A
Other languages
Japanese (ja)
Inventor
Toru Yamaguchi
徹 山口
Kenichi Tomoshige
友重 賢一
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 JP14327285A priority Critical patent/JPS623881A/en
Publication of JPS623881A publication Critical patent/JPS623881A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To avoid the finishing work on the flange surface after welding, to simplify the mechanism and to increase the welding efficiency by providing each positioning means, etc. of each welding torch and flange of the inner and outer faces and by performing an MAG welding of the outer face simultaneously with performing a TIG welding of the inner face of the flange. CONSTITUTION:A flange 17 positioning truck mechanism 16 is advanced by hydraulic cylinder 14, the flange 17 is clamped and located by rollers 20, 21 and the inner face welding torch 18 provided on the mechanism 16 is located for the longitudinal direction of a pipe 12. The height adjustment of the torch 18 is performed automatically by an electric sliding unit 19. The outer face welding torch 41 is moved downward by a hydraulic cylinder 30, the pipe 12 is profiled by a profiling roller 36 and after its pushing up a profiling mechanism 39, the cylinder 30 is stopped and located by a limit switch 38 and simultaneously a welding earth 33 is pressed for positioning by a spring 34 onto the flange 17. The inner face of the flange 17 is subjected to TIG welding with the torch 18 by turning the pipe 12 and simultaneously the outer face to the MAG welding by the torch 40.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は直管フランジ二点同時溶接装置に関し、特KJ
I装用パイプ直管フランジの溶接に使用されるも−ので
ある。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a straight pipe flange two-point simultaneous welding device,
It is used for welding straight pipe flanges for I-equipped pipes.

〔従来の技術〕[Conventional technology]

周知の如く、一般的に直管・母イブフランジの溶接は内
面側、外面側ともC02溶接法などの消耗電極溶接法で
施工されている。ところで、消耗電極溶接法ではスパッ
タが発生して母材に溶着する九め、溶接施工後グライン
ダー等で表面仕上げを行なう必要があり、なかでもフラ
ンジ内面側は配管時のリーク防止の九めに不可欠な作業
となっている。又、このような溶接を機械装置で行なう
時は、第3図に示す如く、ノ臂イブ1.フランジ2の外
形の寸法が変わる几びに溶接トーチ3や溶接アース4の
位置を変えてやる必要があるほか、はとんどの場合溶接
中にノ母イブ1がノ4イブ長手方向(矢印A)に歩むた
め(パイプの回転によシ)溶接トーチ3の倣い機構を備
えている。
As is well known, straight pipes and main tube flanges are generally welded on both the inner and outer surfaces using a consumable electrode welding method such as the C02 welding method. By the way, in the consumable electrode welding method, spatter is generated and welded to the base metal, and after welding, it is necessary to perform surface finishing using a grinder, etc., and the inner surface of the flange is especially essential to prevent leaks during piping. It is a lot of work. In addition, when such welding is performed using a mechanical device, as shown in FIG. When the external dimensions of the flange 2 change, it is necessary to change the positions of the welding torch 3 and welding ground 4, and in most cases, the main rib 1 is moved in the longitudinal direction of the welding tube (arrow A) during welding. The welding torch 3 is equipped with a tracing mechanism to allow the welding torch to move forward (to rotate the pipe).

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、消耗電極溶接法(CO2溶接法等)では
スパッターが発生してこれが母材に溶着するため、溶接
施工後にグラインダー等で表面仕上げを行なう必要があ
シ、なかでもフランジ内面側は配管時のリーク防止のた
めに溶接精度を要求される。また、こりした溶接を機械
装置で行な5場合はパイプ11フランジ2の外形寸法が
変わるたびに溶接トーチ3や溶接アース4の位置を変え
ねばならない。更に、はとんどの場合、溶接中にパイプ
Iがパイプ長手方向に歩むため、溶接トーチ3の倣い機
構を備えなければならない。従って、機械装置の溶接ト
ーチ周辺は非常に複雑な構造になシ、故障も多い。
However, in consumable electrode welding methods (such as CO2 welding), spatter is generated and adheres to the base metal, so it is necessary to finish the surface with a grinder etc. after welding. Welding precision is required to prevent leaks. Furthermore, if the welding is difficult and is performed by a mechanical device, the positions of the welding torch 3 and the welding ground 4 must be changed every time the external dimensions of the pipe 11 and flange 2 change. Furthermore, in most cases, the pipe I moves in the longitudinal direction of the pipe during welding, so a tracing mechanism for the welding torch 3 must be provided. Therefore, the area around the welding torch of the mechanical device has a very complicated structure and is prone to failures.

本発明は上記事情に鑑みてなされたもので、スパッタ溶
着による溶接後のフランジ表面仕上げ作業を皆無とする
とともに、パイプフランジの歩みを皆無として溶接トー
チ及び溶接アースのセツティングを単純化しもって機構
も単純化し得る効率の良い直管フランジ二点同時溶接装
置を提供することを目的とする。
The present invention has been made in view of the above circumstances, and it eliminates the flange surface finishing work after welding by sputter welding, eliminates the step of pipe flanges, simplifies the setting of the welding torch and welding ground, and improves the mechanism. It is an object of the present invention to provide a simple and efficient straight pipe flange two-point simultaneous welding device.

〔問題点全解決するための手段〕[Means to solve all problems]

本発明は、内面溶接トーチを設げたフランジ位置決め台
車機構と、この台車機構に搭載されフランジをクランプ
するローラーと、前記台車機構に搭載され前記内面溶接
トーチを位置決めする電動スライドユニットと、前記台
車機構に接続され九油圧シリンダーと、この油圧シリン
ダーに接続し次トーチ倣いローラー及び溶接アースと、
前記油圧シリンダーの位置決めを行うリミットスイッチ
及びバネとを具備し、前記フランジの内面をティグ溶接
で行うと同時に前記フランジの外面をマグ溶接で行うこ
とを特徴とし、溶接後のフランジ表面仕上げ作業の回避
、機構の単純化及び溶接効率の向上を図ったものである
The present invention provides a flange positioning trolley mechanism provided with an inner welding torch, a roller mounted on the trolley mechanism for clamping the flange, an electric slide unit mounted on the trolley mechanism for positioning the inner welding torch, and the trolley mechanism. Connected to nine hydraulic cylinders, connected to this hydraulic cylinder and then connected to the torch copying roller and welding ground,
A limit switch and a spring are provided for positioning the hydraulic cylinder, and the inner surface of the flange is TIG welded while the outer surface of the flange is MAG welded, thereby avoiding flange surface finishing work after welding. , which aims to simplify the mechanism and improve welding efficiency.

〔作用〕[Effect]

本発明によれば、 ■ フランジ内面溶接にティグ溶接法を採用するととも
に、外面溶接にマグ溶接法を採用することでスパッタ溶
着による溶接後のフランジ表面仕上げ作業を皆無にでき
る。
According to the present invention, (1) By employing the TIG welding method for welding the inner surface of the flange and by employing the MAG welding method for welding the outer surface, the flange surface finishing work after welding by sputter welding can be completely eliminated.

■ 内外二電極同時に溶接することで効率よく溶接を行
うことができる。
■ Welding can be performed efficiently by welding both the internal and external electrodes at the same time.

■ 装置の操作において、ノクイグフランジを2個のロ
ーラーでクランプする方法で位置決めして溶接するため
、溶接中のパイプフランジの歩みをなくすとともに、こ
れによシ溶接トーチ及び溶接アースのセツティングを単
純化でき、機構を単純化できる。
■ During operation of the equipment, the welding is performed by positioning the pipe flange by clamping it with two rollers, which eliminates the need to move the pipe flange during welding, and also makes it easier to set the welding torch and welding ground. It can be simplified and the mechanism can be simplified.

〔実施例〕〔Example〕

以下、本発明の一実施例を第1図及び第2図を参照して
説明する。ここで、第2図は第1図のX−X線に沿う断
面図を示す。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Here, FIG. 2 shows a cross-sectional view taken along the line XX in FIG. 1.

図中の11は、ローラ台である。このローラ台11の上
部には/中イブ12’j4−搭載するターニングローラ
13,13が設けられ、側部には油圧シリンダ14を設
けられている。この油圧シリンダ14には、LMガイド
15を介してフランジ位置決め台車機構16が連結され
ている。
11 in the figure is a roller stand. Turning rollers 13, 13 mounted on the middle eaves 12'j4 are provided on the upper part of the roller stand 11, and a hydraulic cylinder 14 is provided on the side. A flange positioning cart mechanism 16 is connected to this hydraulic cylinder 14 via an LM guide 15.

こO台車機構16には、フランジ17の内面を溶接する
内面溶接トーチ18、このトーチ18の高さ調整を行う
電動スライドユニット19、及びフランジ17をクラン
プするローラー20゜2ノが夫々投げられている。前記
電動スライドユニット19は、内面溶接トーチ18が溶
接している間はトーチ高さが一定になるようにアークセ
ンサの信号で自動的に上下に駆動される。
An inner welding torch 18 for welding the inner surface of the flange 17, an electric slide unit 19 for adjusting the height of the torch 18, and a roller 20°2 for clamping the flange 17 are installed on the O-carriage mechanism 16, respectively. There is. The electric slide unit 19 is automatically driven up and down by a signal from an arc sensor so that the torch height remains constant while the internal welding torch 18 is welding.

前記電動スライドユニット19には、前記内面溶接トー
チ18のスライド微調整を行うアークデルチーシコント
ローラ22、及び前記電動スライドユニット19を駆動
する電動モータ(図示せず)が設げられている。なお、
図中の23はチェーン24を介して前記ターニングロー
ラ13vi:駆動する駆動モータである。
The electric slide unit 19 is provided with an arc del chisi controller 22 that finely adjusts the slide of the inner welding torch 18 and an electric motor (not shown) that drives the electric slide unit 19. In addition,
23 in the figure is a drive motor that drives the turning roller 13vi via a chain 24.

また、図中の25は、ティグ溶接機本体26、マグ溶接
機本体27、及び各油圧シリンダー用の油圧ユニット2
8を設置したアームである。
In addition, 25 in the figure indicates a TIG welding machine main body 26, a MAG welding machine main body 27, and a hydraulic unit 2 for each hydraulic cylinder.
8 is installed on the arm.

このアーム25には、油圧シリンダー29゜30が夫々
吊り下げられている。ここで、一方の油圧シリンダー2
9には、前記パイプ12を加圧し、パイプ12の回転を
円滑にすると同時にはねあがシを防止するパイプ加圧ロ
ーラー31が設けられている。他方の油圧シリンダー3
0には、接続金具32を介して溶接アース33が接続さ
れている。ここで、溶接アース33はバネ34にて押圧
が調整される。また、油圧シリンダー30には接続金具
32.35”f介して倣いローラー36が設けられてい
る。この倣いローラー36はバネ37によってその押圧
を調整されて上下にスライドし、その近くにはリミ、ト
スイッチ38f:有し前記油圧シリンダー30のスライ
ドを制限する。前記接続金具35には、倣い機構39を
介して外面溶接トーチ40が設げられている。なお、図
中の41は前記内面溶接トーチ18、外面溶接トーチ4
0の微調整用ハンドルの働きをするトーチマウントを、
42は油圧シリンダーのガイドカバーを示す。
Hydraulic cylinders 29 and 30 are suspended from the arms 25, respectively. Here, one hydraulic cylinder 2
9 is provided with a pipe pressure roller 31 that pressurizes the pipe 12 to make the rotation of the pipe 12 smooth and at the same time prevent it from springing up. The other hydraulic cylinder 3
0 is connected to a welding ground 33 via a connecting fitting 32. Here, the pressure of the welding ground 33 is adjusted by a spring 34. Further, the hydraulic cylinder 30 is provided with a copying roller 36 via a connecting fitting 32.35''f.The copying roller 36 slides up and down with its pressure adjusted by a spring 37, and there is a limiter near the copying roller 36. switch 38f: has this to limit the sliding of the hydraulic cylinder 30.The connecting fitting 35 is provided with an external welding torch 40 via a copying mechanism 39.In addition, 41 in the figure is the internal welding torch 40. Torch 18, external welding torch 4
A torch mount that functions as a handle for fine adjustment of 0.
42 indicates a guide cover for the hydraulic cylinder.

次に、前述し次構造の溶接装置の動作について説明する
Next, the operation of the welding apparatus having the following structure described above will be explained.

まず、制御装置のスタートがタンを押すと油圧シリンダ
ー14でフランジ位置決め台車機構15が前進する。そ
して、ローラー20が7ランソ17を押し出し2ランジ
17を移動させてローラー2ノとでフランジ17をクラ
ンプして位置決めする。この際、内面溶接トーチ18は
前記台車機#115に設げられているので、フランジ1
7を位置決めすると同時にパイプ長手方向43VC対し
て位置決めされることになる。
First, when the start button of the control device is pressed, the flange positioning cart mechanism 15 is moved forward by the hydraulic cylinder 14. Then, the roller 20 pushes out the seventh langue 17, moves the second flange 17, and clamps and positions the flange 17 with the roller 2. At this time, since the inner welding torch 18 is provided on the bogie machine #115, the flange 1
At the same time as positioning 7, the pipe is positioned in the longitudinal direction 43VC.

前記内面溶接トーチ18の高さ調整は、制御装置であら
かじめ設定され尺移動量だけ電動スライドユニット19
を駆動して自動的に行なう。
The height of the internal welding torch 18 is adjusted by the electric slide unit 19 according to the distance set in advance by the control device.
This is done automatically by driving the

一方、外面溶接トーチ40は油圧シリンダー30で下降
され、倣いローラー36がパイプ12を倣い、倣いt!
11!t39’x押し上げた後、リミットスイッチ38
で油圧シリンダー30t−停止し位置決めをする。なお
、・9イブ長手方向44の調整は、フランジ17がロー
ラー21に押し付けられるのでフランジ17の厚みが変
わっても変える必要はない。また、前記位置決めと同時
に、溶接アース33がフランジ17の上にバネ34で押
し付けられて位置決めされる。
On the other hand, the external welding torch 40 is lowered by the hydraulic cylinder 30, the copying roller 36 copies the pipe 12, and the copying t!
11! After pushing up t39'x, limit switch 38
Stop the hydraulic cylinder 30t and position it. Note that the adjustment in the longitudinal direction 44 does not need to be changed even if the thickness of the flange 17 changes because the flange 17 is pressed against the roller 21. Further, at the same time as the positioning, the welding ground 33 is pressed onto the flange 17 by the spring 34 and positioned.

そして、倣い機構39をバネ37によってスライドし、
更に油圧シリンダー29によってパイプ加圧ローラ31
が調整してバイア”12をセツティングし、この724
112%ターニングローラ3、駆動モータ23で回転し
てフランジ17の内外面を2電極に溶接する。
Then, the copying mechanism 39 is slid by the spring 37,
Furthermore, the pipe pressure roller 31 is pressed by the hydraulic cylinder 29.
adjusted and set the via”12, and this 724
The 112% turning roller 3 is rotated by the drive motor 23 to weld the inner and outer surfaces of the flange 17 to the two electrodes.

しかして、本発明によれば、フランジ17の内面を内面
溶接トーチ18によシティグ溶接するとともに、その外
面を外面溶接トーチ4oでマグ溶接をするため、従来と
不可欠とされていた溶接後の表面仕上げを廃止すること
ができる。
According to the present invention, the inner surface of the flange 17 is sig welded by the inner welding torch 18, and the outer surface is MAG welded by the outer welding torch 4o. Finishing can be abolished.

また、フランジ7の内外面を二電極同時に溶接する次め
、効率よく溶接することができる。更に、フランジ7を
2個のローラー20.21でクランプして位置決めする
ため、内面溶接トーチ18、外面溶接トーチ4o及び溶
接アース33のセツティングを単純にできる。同様の理
由によシ、フランジ17の厚みが変化してもこれに対す
るトーチの位置を変化する必要がなくなったため、溶接
トーチの倣い機構は上下方向のみすればよく倣い機構の
構造が単純になった。
Further, by simultaneously welding the inner and outer surfaces of the flange 7 with two electrodes, welding can be performed efficiently. Furthermore, since the flange 7 is clamped and positioned by the two rollers 20, 21, the setting of the inner welding torch 18, the outer welding torch 4o, and the welding ground 33 can be simplified. For the same reason, even if the thickness of the flange 17 changes, it is no longer necessary to change the position of the torch relative to it, so the structure of the welding torch tracing mechanism has become simple, as it only needs to be moved in the vertical direction. .

〔発明の効果〕〔Effect of the invention〕

以上詳述し次如く不発明によれば、溶接後のフランジ表
面仕上げ作業を回避するとともに、機構の単純化及び溶
接効率の向上化をなし得る性能の優れ几直管フランジ二
点同時溶接装置を提供できる。
As described in detail above, the present invention provides a two-point simultaneous welding device for straight pipe flanges with excellent performance that avoids the flange surface finishing work after welding, simplifies the mechanism, and improves welding efficiency. Can be provided.

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

第1図は本発明の一実施例に係る直管フランジ二点同時
溶接装置の説明図、第2図は第1図のX−X線に沿う断
面図、第3図は従来技術の問題点を説明する几めの図で
ある。 11・・・ローラ台、12−・・ノセイ!、13・・・
ターニングローラ、14,29.30・・・油圧シリン
ダ、16・・・フランジ位置決め台車機構、17・・・
7ランヅ、18・・・内面溶接トーチ、19・・・電動
スライドユニット、20.21・・・ローラ、22・・
・アークがルテージコントローラ、25・・・油圧ユニ
、ト、26・・・ティグ溶接機本体、27・・・マグ溶
接機本体、28・・・油圧ユニット、3ノ・・・ノ9イ
グ加圧ローラー、32.35・・・接続金具、33・・
・溶接アース、34,3:/・・・バネ、38・・・リ
ミットスイッチ、39・・・倣い機構、40・・・外面
溶接トーチ、41・・・トーチマウント、42・・・ガ
イドカバー
Fig. 1 is an explanatory diagram of a straight pipe flange two-point simultaneous welding device according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line X-X in Fig. 1, and Fig. 3 is a problem with the conventional technology. FIG. 11...Roller stand, 12-...Nosei! , 13...
Turning roller, 14, 29. 30... Hydraulic cylinder, 16... Flange positioning cart mechanism, 17...
7 Lands, 18...Inner welding torch, 19...Electric slide unit, 20.21...Roller, 22...
・The arc is the Rutage controller, 25... Hydraulic unit, 26... TIG welding machine main body, 27... MAG welding machine main body, 28... Hydraulic unit, 3 No. 9 Ig addition. Pressure roller, 32.35... Connection fitting, 33...
・Welding ground, 34, 3: Spring, 38: Limit switch, 39: Copying mechanism, 40: External welding torch, 41: Torch mount, 42: Guide cover

Claims (1)

【特許請求の範囲】[Claims] 予め組立てられたフランジと直管の同時溶接を行う直管
フランジ二点同時溶接装置において、内面溶接トーチを
設けたフランジ位置決め台車機構と、この台車機構に搭
載されフランジをクランプするローラーと、前記台車機
構に搭載され前記内面溶接トーチを位置決めする電動ス
ライドユニットと、前記台車機構に接続された油圧シリ
ンダーと、この油圧シリンダーに接続した外面溶接トー
チ、トーチ倣いローラー及び溶接アースと、前記油圧シ
リンダーの位置決めを行うリミットスイッチ及びバネと
を具備し、前記フランジの内面をティグ溶接で行うと同
時に前記フランジの外面をマグ溶接で行うことを特徴と
する直管フランジ二点同時溶接装置。
A straight pipe flange two-point simultaneous welding device that performs simultaneous welding of a pre-assembled flange and a straight pipe, comprising: a flange positioning trolley mechanism provided with an inner welding torch; a roller mounted on the trolley mechanism for clamping the flange; and the trolley. an electric slide unit mounted on a mechanism for positioning the internal welding torch; a hydraulic cylinder connected to the dolly mechanism; an external welding torch connected to the hydraulic cylinder; a torch copying roller; and a welding ground; and positioning of the hydraulic cylinder. What is claimed is: 1. A straight pipe flange two-point simultaneous welding device, comprising: a limit switch and a spring for welding a straight pipe flange, and simultaneously performing TIG welding on the inner surface of the flange and simultaneously performing MAG welding on the outer surface of the flange.
JP14327285A 1985-06-29 1985-06-29 Two point simultaneous welding equipment for flange of straight pipe Pending JPS623881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14327285A JPS623881A (en) 1985-06-29 1985-06-29 Two point simultaneous welding equipment for flange of straight pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14327285A JPS623881A (en) 1985-06-29 1985-06-29 Two point simultaneous welding equipment for flange of straight pipe

Publications (1)

Publication Number Publication Date
JPS623881A true JPS623881A (en) 1987-01-09

Family

ID=15334890

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14327285A Pending JPS623881A (en) 1985-06-29 1985-06-29 Two point simultaneous welding equipment for flange of straight pipe

Country Status (1)

Country Link
JP (1) JPS623881A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04228264A (en) * 1990-12-27 1992-08-18 Maruichi:Kk Automatic welding apparatus for end faces of pipes
KR20030058889A (en) * 2002-01-02 2003-07-07 정중근 Autometic pipe welding system
CN102152053A (en) * 2011-04-14 2011-08-17 中国水利水电第十三工程局有限公司橡塑制品厂 Welding and positioning apparatus of steel pipe flange
CN102728938A (en) * 2012-05-22 2012-10-17 戴刚平 Inner-outer dual-surface welding device for steel tube and flange
CN103143814A (en) * 2013-02-22 2013-06-12 杭州德宝机电制造有限公司 Equipment special for girth welding of steel pipe and welding neck flange
CN104551496A (en) * 2014-12-11 2015-04-29 江苏振光电力设备制造有限公司 Flange assembly machine
CN106181142A (en) * 2016-07-12 2016-12-07 兖州煤业股份有限公司 Steel-pipe welding device
CN106392257A (en) * 2016-10-27 2017-02-15 山东布洛尔机电科技有限公司 Adjustable flange straight pipe welding machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04228264A (en) * 1990-12-27 1992-08-18 Maruichi:Kk Automatic welding apparatus for end faces of pipes
KR20030058889A (en) * 2002-01-02 2003-07-07 정중근 Autometic pipe welding system
CN102152053A (en) * 2011-04-14 2011-08-17 中国水利水电第十三工程局有限公司橡塑制品厂 Welding and positioning apparatus of steel pipe flange
CN102728938A (en) * 2012-05-22 2012-10-17 戴刚平 Inner-outer dual-surface welding device for steel tube and flange
CN103143814A (en) * 2013-02-22 2013-06-12 杭州德宝机电制造有限公司 Equipment special for girth welding of steel pipe and welding neck flange
CN103143814B (en) * 2013-02-22 2015-08-26 杭州德宝机电制造有限公司 Steel pipe and hubbed flange boxing welding dedicated device
CN104551496A (en) * 2014-12-11 2015-04-29 江苏振光电力设备制造有限公司 Flange assembly machine
CN106181142A (en) * 2016-07-12 2016-12-07 兖州煤业股份有限公司 Steel-pipe welding device
CN106392257A (en) * 2016-10-27 2017-02-15 山东布洛尔机电科技有限公司 Adjustable flange straight pipe welding machine

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