JPS62118973A - Adhesion preventing method for cut spatter to inner peripheral face of steel pipe - Google Patents
Adhesion preventing method for cut spatter to inner peripheral face of steel pipeInfo
- Publication number
- JPS62118973A JPS62118973A JP25883785A JP25883785A JPS62118973A JP S62118973 A JPS62118973 A JP S62118973A JP 25883785 A JP25883785 A JP 25883785A JP 25883785 A JP25883785 A JP 25883785A JP S62118973 A JPS62118973 A JP S62118973A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- spatter
- steel
- cut
- length
- 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
Landscapes
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、綱管内周面への溶断スパッターの付着防止方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for preventing adhesion of melt spatter to the inner circumferential surface of a steel pipe.
「従来の技術」
例えば帯鋼をスパイラル状に成形しながら、その継目を
溶接して大径のスパイラル鋼管を製造するラインにおい
て、スパイラル鋼管を所要の長さ毎に、例えばガスある
いはプラズマ等によって溶断する工程がある。``Prior art'' For example, on a line that manufactures large-diameter spiral steel pipes by forming steel strips into a spiral shape and welding the joints, the spiral steel pipes are cut into required lengths using, for example, gas or plasma. There is a process to do this.
スパイラル鋼管のガスあるいはプラズマ等による溶断に
おいては、溶断中にスパッターが飛散して溶断部の管内
周面に付着する。When a spiral steel pipe is cut by gas or plasma, spatter is scattered during the cutting process and adheres to the inner circumferential surface of the pipe at the cut part.
管内周面に付着したスパッターは、製品品質を低下させ
るだけでなく、後工程での加工に際し疵の発生原因とな
るので、従来は、スパイラル鋼管の溶断に先き立ち、溶
断部1の前後の所要長さ範囲の管内周面に、スパック−
付着防止剤を塗布していた(特開昭53400948号
公報参照)。Spatter adhering to the inner circumferential surface of the pipe not only reduces product quality but also causes flaws during processing in subsequent processes. Splash on the inner circumferential surface of the pipe within the required length range.
An anti-adhesion agent was applied (see Japanese Patent Application Laid-open No. 53400948).
「発明が解決しようとする問題点」
ところで、スパイラル鋼管の内周面にスパッター付着防
止剤を塗布するには、特開昭53−100948号公報
に開示されている如く、スパイラル成形部を出た鋼管の
進行ラインに沿って管切断装置の管切断位置以降に設け
る管始端検知装置と、前記切断装置の切断開始位置より
前方において綱管内のほぼ中心に支承され、半径方向に
スパンター付着防止剤を噴射するチップを備えたソレノ
イド作動噴射装置と、前記管始端検知装置の検知信号を
受けて前記噴射装置のソレノイドに制御電流を送り、鋼
管の切断予定線を中心とする前後の所要長さ範囲の管内
周面にスパッター付着防止剤を噴射させるタイマー付制
御装置とからなる設備が必要であり、この設備は、多大
の投資を要するので、実施する上で問題があった。``Problems to be Solved by the Invention'' By the way, in order to apply a spatter adhesion prevention agent to the inner circumferential surface of a spiral steel pipe, as disclosed in Japanese Patent Application Laid-open No. 53-100948, A pipe start end detection device is provided after the pipe cutting position of a pipe cutting device along the progress line of the steel pipe, and a pipe start end detection device is supported approximately at the center of the steel pipe in front of the cutting start position of the cutting device, and a spunter adhesion prevention agent is applied in the radial direction. A solenoid-operated injector equipped with an injecting tip, and a control current sent to the solenoid of the injector in response to a detection signal from the pipe start end detection device, so that the required length range before and after the planned cutting line of the steel pipe is This requires equipment that includes a control device with a timer that sprays the spatter adhesion prevention agent onto the inner circumferential surface of the pipe, and this equipment requires a large amount of investment, which poses a problem in its implementation.
「問題点を解決するための手段」
本発明は、多大な設備投資を必要とするような特別な設
備によることなく、極めて簡酢な手段によって、綱管内
周面への溶断スパッターの付着を防止できるようにした
ものである。"Means for Solving the Problem" The present invention prevents adhesion of spatter from melting spatter to the inner circumferential surface of the steel pipe by an extremely simple means without requiring special equipment that requires a large capital investment. It has been made possible.
すなわち、本発明は、第1図に示す如く、回転している
鋼管Pの斜め上方に位置しているガスあるいはプラズマ
等の溶断装置1によって、鋼管Pを所要長さに溶断する
に当り、溶断位置の前後の所要範囲の長さを有すると共
に、鋼管Pの内径よりも500程度小さい外径を有する
鋼板製筒状遮蔽体2を鋼管P内に叩大して、鋼管Pを溶
断装置1により所要長さに溶断するのである。That is, as shown in FIG. 1, the present invention uses a gas or plasma fusing device 1 located obliquely above the rotating steel pipe P to melt and cut the steel pipe P to a required length. A steel plate cylindrical shield 2 having a length in the required range before and after the position and an outer diameter approximately 500 smaller than the inner diameter of the steel pipe P is expanded into the steel pipe P, and the steel pipe P is cut to the required length by the fusing device 1. It melts right away.
「作用」
第1図に示す如(、鋼管Pの溶断中に飛散しているスパ
ッターは、鋼管Pの内周面に付着することなく、鋼管P
内に挿入されている鋼板製筒状遮蔽体2の外周面に付着
する。``Effect'' As shown in Fig. 1, the spatter scattered during the melting of the steel pipe P does not adhere to the inner circumferential surface of the steel pipe P.
It adheres to the outer peripheral surface of the steel plate cylindrical shield 2 inserted therein.
「実施例」
第2図は、本発明方法を、帯鋼Sをスパイラル状に成形
しながら、その継目をf6接して大径のスパイラル鋼管
Pを製造するラインにおいて、スパイラル鋼WPを所要
長さ毎に、台車3上の/8@装置1により溶断するに当
って、溶断位置の前後の所要範囲の長さを有するH4板
製筒状遮蔽体2をスパイラル鋼tP内に挿入して、スパ
イラル鋼管Pを溶断装置lにより所要長さ毎に溶断する
ようにした実施例である。``Example'' Figure 2 shows the method of the present invention being applied to a line in which a large diameter spiral steel pipe P is manufactured by forming a steel strip S into a spiral shape and making the joint contact f6. At each time, when fusing is performed by the /8@device 1 on the trolley 3, a cylindrical shielding body 2 made of H4 plate having the required length before and after the fusing position is inserted into the spiral steel tP, and the spiral This is an embodiment in which a steel pipe P is cut into required lengths by a fusing device l.
この場合、鋼板製筒状遮蔽体2が、スパイラル鋼管Pと
一緒に進行しないように、鋼板製筒状遮蔽体2の後端に
支持板2aを設け、この支持板2aにフック2bを回転
自在に取り付け、このフック2bに、スパイラル鋼管P
の上流側における図示してない例えばフォーミングロー
ルフレームに固定されたワイヤー4を連結しておく。In this case, a support plate 2a is provided at the rear end of the steel plate cylindrical shield 2 so that the steel plate cylindrical shield 2 does not advance together with the spiral steel pipe P, and a hook 2b is rotatably attached to this support plate 2a. Attach the spiral steel pipe P to this hook 2b.
A wire 4 fixed to, for example, a forming roll frame (not shown) on the upstream side of the roller is connected.
また前記鋼板製筒状遮蔽体2の前後端の外周に、スパイ
ラル鋼管Pの内周面に摺り疵を付けないよう、疵防止用
リング2cを取りつけておく。Further, a flaw prevention ring 2c is attached to the outer periphery of the front and rear ends of the steel plate cylindrical shielding body 2 to prevent scratches from forming on the inner circumferential surface of the spiral steel pipe P.
さらに鋼板製筒状遮蔽体2はWtsIil板で作成した
方が、溶断時の余熱によって早く温度上昇し、溶断スパ
ッターを高効率にて付着させることができる。Furthermore, if the steel plate cylindrical shielding body 2 is made of a WtsIil plate, the temperature will rise faster due to residual heat during fusing, and fusing spatter can be deposited with high efficiency.
しかし、i鋼板で筒状遮蔽体2を作成すると、溶断スパ
ッターによって筒状遮蔽体2にすぐ孔がおいてしまうの
で、第3図に示す如<、1sstt板を2@巻きか3重
巻きにした内装用筒伏体5を、前記筒状遮蔽体2内に装
入した方がよい。However, if the cylindrical shielding body 2 is made of steel plate, a hole will be easily formed in the cylindrical shielding body 2 by the fusing sputter, so as shown in Fig. It is better to insert the interior cylindrical body 5 into the cylindrical shielding body 2.
またさらに、第1図に示す如く、回転中の鋼管Pを溶断
するときに飛散するスパッターの流れは、ドラグライン
のt=i方向において3寸法となるので、鋼管P内に挿
入する鋼板製筒状遮蔽体2の外径は、前記3寸法によっ
て決定される。Furthermore, as shown in FIG. 1, the flow of spatter scattered when cutting the rotating steel pipe P has three dimensions in the t=i direction of the drag line. The outer diameter of the shaped shield 2 is determined by the three dimensions mentioned above.
本考案者の実験によれば、スパッターの流れと3寸法と
の関係は、鋼管Pの肉厚と鋼管Pの搬送速度とによって
相違することが知見された。According to the inventor's experiments, it was found that the relationship between the sputter flow and the three dimensions differs depending on the wall thickness of the steel pipe P and the conveyance speed of the steel pipe P.
例えば第4図(A)は、肉厚6.0龍、搬送速度2.3
m/分の鋼管Pを溶断した場合のスパッターの流れを示
し、第4図(B) は、肉厚12.0鶴 (11,0m
1)、搬送速度1.78++ 7分(2,0m 7分)
の各鋼管Pを溶断した場合のスパッターの流れを示し、
第4図(C)は、肉W、9.0−嘗、搬送速度2.4m
/分の鋼管Pを溶断した場合のスパングーの流れを示し
たものであるが、第4図(C)の条件のときの3寸法が
最も短<、70u+であった。For example, in Figure 4 (A), the wall thickness is 6.0 mm and the conveyance speed is 2.3 mm.
Fig. 4 (B) shows the flow of spatter when steel pipe P is cut at a rate of 12.0 m/min.
1), conveyance speed 1.78++ 7 minutes (2.0m 7 minutes)
shows the flow of spatter when each steel pipe P is fused,
Figure 4 (C) shows meat W, 9.0-thick, conveyance speed 2.4 m.
This figure shows the flow of the spangoo when the steel pipe P is fused at a speed of 70 mm, and the three dimensions under the conditions shown in FIG.
従ってa<53mmを満足するよう鋼板製筒状遮蔽体2
の外径を決定すればよく、例えば内径600flの鋼管
Pの場合、外径550 amの鋼板製筒状遮蔽体2を用
いればよい。Therefore, in order to satisfy a<53mm, the steel plate cylindrical shield 2
For example, in the case of a steel pipe P with an inner diameter of 600 fl, a steel plate cylindrical shield 2 with an outer diameter of 550 am may be used.
「発明の効果」
以上述べた如く、本発明は、鋼管を所要長さに溶断する
に当たり、溶断位置の前後の所要範囲の長さを有すると
ノ(に、鋼管の内径よりも50鰭程度小さい外径を有す
る鋼板製筒状遮蔽体を、綱管内に挿入するようにしたの
で、鋼管の溶断中に飛散しているスパッターを、綱管内
に挿入されている鋼板製筒状遮蔽体の外周面に付着させ
ることができ、従って鋼管の内周面には溶断スパンター
を全く付着させることがなかった。``Effects of the Invention'' As described above, the present invention provides a method for cutting a steel pipe to a required length by cutting the steel pipe to a required length by cutting the steel pipe to a required length. Since the steel plate cylindrical shield having an outer diameter is inserted into the steel pipe, the spatter scattered during the melting of the steel pipe is removed from the outer peripheral surface of the steel plate cylindrical shield inserted into the steel pipe. Therefore, no spunter was attached to the inner peripheral surface of the steel pipe.
しかも、溶断すべき綱管内に、鋼板製筒状遮蔽体を掃入
するという掻めて簡単な手段によって、極めて有効に綱
管内周面に対する溶断スパッターの付着を防止できるの
で、何等多大な設備投資をすることなく、橿めて容易に
既設の鋼管溶断設備に適用でき、経済的である。In addition, the adhesion of spatter to the inner circumferential surface of the steel pipe can be extremely effectively prevented by the extremely simple method of sweeping a cylindrical shield made of steel plate into the steel pipe to be melted. It is economical and can be easily applied to existing steel pipe fusing equipment without any additional work.
第1図は本発明方法の原理的説明図、第2図は本発明方
法の実施例を示す説明図、第3図は鋼板製筒状遮蔽体の
実施例を示す斜視図、第4WJ(A)、(B)、(C)
は、鋼管熔断時におけるスパッターの流れの状況が、鋼
管の肉厚と鋼管の搬送速度とによって相違することをそ
れぞれ示す説明図である。
P・・・鋼管、■・・・溶断装置、2・・・鋼板製筒状
遮蔽体、5・・・内装用筒状体
第1図
第2図FIG. 1 is an explanatory diagram of the principle of the method of the present invention, FIG. 2 is an explanatory diagram showing an embodiment of the method of the present invention, FIG. 3 is a perspective view of an embodiment of a cylindrical shield made of steel plate, and ), (B), (C)
2A and 2B are explanatory diagrams showing that the state of sputter flow during steel pipe melting differs depending on the wall thickness of the steel pipe and the conveyance speed of the steel pipe. P... Steel pipe, ■... Fusing device, 2... Steel plate cylindrical shield, 5... Interior cylindrical body Fig. 1 Fig. 2
Claims (1)
要範囲の長さを有すると共に、鋼管の内径よりも50m
m程度小さい外径を有する鋼板製筒状遮蔽体を、綱管内
に挿入することを特徴とする鋼管内周面への溶断スパッ
ターの付着防止方法。When cutting the steel pipe to the required length, the length must be within the required range before and after the cutting position, and the length should be 50 m longer than the inner diameter of the steel pipe.
A method for preventing adhesion of weld spatter to the inner circumferential surface of a steel pipe, the method comprising inserting a cylindrical shield made of steel plate having an outer diameter as small as 0.0 m into the steel pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25883785A JPS62118973A (en) | 1985-11-18 | 1985-11-18 | Adhesion preventing method for cut spatter to inner peripheral face of steel pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25883785A JPS62118973A (en) | 1985-11-18 | 1985-11-18 | Adhesion preventing method for cut spatter to inner peripheral face of steel pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62118973A true JPS62118973A (en) | 1987-05-30 |
Family
ID=17325711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25883785A Pending JPS62118973A (en) | 1985-11-18 | 1985-11-18 | Adhesion preventing method for cut spatter to inner peripheral face of steel pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62118973A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10675716B2 (en) | 2017-05-04 | 2020-06-09 | Rolls-Royce Plc | Vane arrangement for a gas turbine engine |
US10689990B2 (en) | 2017-05-04 | 2020-06-23 | Rolls-Royce Plc | Vane arrangement for a gas turbine engine |
-
1985
- 1985-11-18 JP JP25883785A patent/JPS62118973A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10675716B2 (en) | 2017-05-04 | 2020-06-09 | Rolls-Royce Plc | Vane arrangement for a gas turbine engine |
US10689990B2 (en) | 2017-05-04 | 2020-06-23 | Rolls-Royce Plc | Vane arrangement for a gas turbine engine |
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