JPS5916668A - Method for cutting prepared hole for branch pipe - Google Patents
Method for cutting prepared hole for branch pipeInfo
- Publication number
- JPS5916668A JPS5916668A JP3595283A JP3595283A JPS5916668A JP S5916668 A JPS5916668 A JP S5916668A JP 3595283 A JP3595283 A JP 3595283A JP 3595283 A JP3595283 A JP 3595283A JP S5916668 A JPS5916668 A JP S5916668A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- cutting
- branch pipe
- prepared hole
- arc 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/10—Auxiliary devices, e.g. for guiding or supporting the torch
- B23K7/102—Auxiliary devices, e.g. for guiding or supporting the torch for controlling the spacial relationship between the workpieces and the gas torch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
- B23Q17/2233—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work for adjusting the tool relative to the workpiece
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は枝管下穴切断装置に係わり、特にプラズマ切断
法を採用した場合におけるアーク長を一定に保つ方法に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a branch pipe pilot hole cutting device, and particularly to a method of keeping the arc length constant when a plasma cutting method is employed.
X−θ、2軸制御による下穴切断方法としては、第1図
に示すように、トーチ2の両側にセンサー3を取付ける
必要があった。この2つのセンサーに、接触式のセンサ
ーを用いると、切断方向に溶接ビード4があると、ひっ
かかる心配が生じる。As shown in FIG. 1, the method of cutting a pilot hole using X-θ, two-axis control requires the installation of sensors 3 on both sides of the torch 2. If contact type sensors are used for these two sensors, there is a risk that the weld bead 4 will get caught if there is a weld bead 4 in the cutting direction.
非接触式磁気センサーを用いると、第2図のようなステ
ンレス鋼5と軟鋼6の異種材の継合わせ部に下穴を切断
する場合、ステンレス鋼と軟鋼とで材質的に磁気特性が
異なるためセンサーの応答が変化し、アーク長を一定に
保てなくなるという問題があった。またトーチ2とセン
サー3とは耐熱上、ある間隔tを保たなくてはならない
ため、母管端部近傍については、センサー3では、検測
できなくなるという問題点があった。When using a non-contact magnetic sensor, when cutting a pilot hole in the joint of dissimilar materials such as stainless steel 5 and mild steel 6 as shown in Figure 2, it is difficult to cut a pilot hole in the joint of different materials such as stainless steel 5 and mild steel 6, because the magnetic properties of the materials are different between stainless steel and mild steel. There was a problem in that the sensor response changed and the arc length could not be kept constant. Furthermore, since a certain distance t must be maintained between the torch 2 and the sensor 3 for heat resistance reasons, there is a problem in that the sensor 3 cannot detect the vicinity of the end of the main pipe.
また、初めからアーク電圧を検出してアーク長を一定に
保とうとすることも考えたが、切断開始時にパイロット
アークからメインアークへと切換わる際の、電圧変動が
切断幅のアーク電圧変動よりも極端に大きいため、アー
ク長の初期値設定が不可能となるということがわかった
。We also considered detecting the arc voltage from the beginning and trying to keep the arc length constant, but when switching from the pilot arc to the main arc at the start of cutting, the voltage fluctuation was greater than the arc voltage fluctuation over the cutting width. It was found that it was impossible to set the initial value of the arc length because it was extremely large.
本発明はアーク長を一定に保つことのできるX−θ、2
軸制御による枝管下穴切断方法を提供するにある。The present invention is capable of keeping the arc length constant, X-θ, 2
The object of the present invention is to provide a method for cutting a branch pipe pilot hole using axis control.
本発明はX−θ、2軸制御による下穴切断方法として、
接触式のセンサーによりアーク長の基準値を設定し、切
断開始時の過渡的な電圧変動をさけて、電圧がアーク長
に比例とする状態となってからならいをはじめトーチと
母管の距離を制御するものである。The present invention is a pilot hole cutting method using X-θ, two-axis control.
A reference value for the arc length is set using a contact sensor, and the distance between the torch and the main pipe is adjusted when the voltage is proportional to the arc length, avoiding transient voltage fluctuations at the start of cutting. It is something to control.
以下本発明の実施例を図面により説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第3図は下穴切断装置の概略図である。母管1は中心軸
(θ軸)を軸として回転させ、トーチ2は中心軸方向(
X軸)に移動させる。このX−θ、2軸の移動にサーボ
モータを使い、これをマイクロコンピュータにより、入
力データ通りに制御することにより下穴を切断する。FIG. 3 is a schematic diagram of the pilot hole cutting device. The main tube 1 rotates around the central axis (θ axis), and the torch 2 rotates in the central axis direction (
(X-axis). A servo motor is used for the movement in the two axes of X-θ, and the pilot hole is cut by controlling this with a microcomputer according to the input data.
この場合、母管真円度により、アーク長10が変化し切
断がなめらかに行なわれないことがある。In this case, the arc length 10 changes depending on the roundness of the main tube, and cutting may not be performed smoothly.
このことを防ぐために、アーク電圧によりアーク長を制
御する必要がある。まず、適正アーク長を決定するため
に、第4図(イ)(ロ)のように、接触式センサーを用
いて、アーク長10の基準値を決定し、その後、(ハ)
接触式センサーを退避させ、アーク電圧が定常状態にな
った時点で、アーク電圧の変化をアーク電圧検出器11
で検出し、トーチ昇降装置12を制御することによシ、
アーク長を一定に保ちながら切断を行なおうとするもの
である。In order to prevent this, it is necessary to control the arc length using the arc voltage. First, in order to determine the appropriate arc length, as shown in Figure 4 (a) and (b), a reference value of arc length 10 is determined using a contact sensor, and then (c)
When the contact sensor is evacuated and the arc voltage reaches a steady state, changes in the arc voltage are detected by the arc voltage detector 11.
By detecting this and controlling the torch lifting device 12,
The aim is to perform cutting while keeping the arc length constant.
第5.′1100に本発明の変形応用例を示す。第5図
は母管を鉛直に立てて回転させ、トーチを縦方向に移動
させ枝管の鞍形曲線16を切断しようとするものである
。第6図は、斜交管13のさし込みを容易にするため、
トーチ角度を角度変更板15により変更できるようにし
たものである。Fifth. '1100 shows a modified example of application of the present invention. FIG. 5 shows an attempt to cut the saddle-shaped curve 16 of the branch pipe by rotating the main pipe vertically and moving the torch in the vertical direction. FIG. 6 shows that in order to facilitate insertion of the diagonal pipe 13,
The torch angle can be changed using an angle changing plate 15.
本発明によれば、枝管下穴切断装置において、トーチを
母管に近づけ、パイロットアークからメインアークに切
換わった後、適正なアーク長で切断していくという一連
9動作を、トーチ上下機とアーク長検出用接触式センサ
ー及びアーク電圧検出装置により行なうことができるよ
うになシ、パイロットアークからメインアーク切換え時
の過渡的な電圧変動による誤動作をなくすことができる
。According to the present invention, in a branch pipe pilot hole cutting device, a series of 9 operations are performed by bringing the torch closer to the main pipe, switching from the pilot arc to the main arc, and then cutting at an appropriate arc length. This can be done using a contact type sensor for arc length detection and an arc voltage detection device, thereby eliminating malfunctions caused by transient voltage fluctuations when switching from the pilot arc to the main arc.
第1図は従来のならい方法の概略図、第2図は従来のな
らい方法の概略図、第3図は下穴切断装置の概略図、第
4図は本発明の一実施例を示す動作概略図、第5.第6
図は本発明の他の実施例を示す概略図である。
7・・・θ軸、訃・・X軸、9・・・接触式センサー、
10・・・アーク長、11・・・アーク電圧検出器、1
2・・・ト第1図
第 2 図
第 3 図
第 4 図
(イ) (ロ) (ハ) に
ノ第5図
第 6 口
351−Fig. 1 is a schematic diagram of a conventional profiling method, Fig. 2 is a schematic diagram of a conventional profiling method, Fig. 3 is a schematic diagram of a pilot hole cutting device, and Fig. 4 is a schematic diagram of an embodiment of the present invention. Figure, 5th. 6th
The figure is a schematic diagram showing another embodiment of the invention. 7...θ-axis, X-axis, 9...Contact sensor,
10... Arc length, 11... Arc voltage detector, 1
2...G Figure 1 Figure 2 Figure 3 Figure 4 (A) (B) (C) Figure 5 Figure 6 Port 351-
Claims (1)
断用プラズマトーチを母管の長手方向に移動させ、母管
を周方向に回転させて切断する枝管下穴切断方法におい
て、母管とプラズマトーチの間隙を切断開始前に接触式
センサーで設定し、切断開始時のパイロットアークから
メインアークへ切換わる際の電圧の変動がおさまってか
ら、切断時の間隙変化により生ずるアーク長の変化を電
圧変動分として検出し、この電圧変化分を制御すること
によpアーク長を一定に保つようにしたことを特徴とす
る枝管下穴切断方法。1. In a method for cutting a branch pipe prepared hole in the main pipe by moving at least a plasma torch for cutting in the longitudinal direction of the main pipe and rotating the main pipe in the circumferential direction, The gap between the plasma torch is set using a contact sensor before the start of cutting, and after the voltage fluctuation when switching from the pilot arc to the main arc at the start of cutting has subsided, changes in the arc length caused by the gap change during cutting are measured. A method for cutting a pilot hole in a branch pipe, characterized in that the p-arc length is kept constant by detecting the voltage variation and controlling the voltage variation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3595283A JPS5916668A (en) | 1983-03-07 | 1983-03-07 | Method for cutting prepared hole for branch pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3595283A JPS5916668A (en) | 1983-03-07 | 1983-03-07 | Method for cutting prepared hole for branch pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5916668A true JPS5916668A (en) | 1984-01-27 |
Family
ID=12456308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3595283A Pending JPS5916668A (en) | 1983-03-07 | 1983-03-07 | Method for cutting prepared hole for branch pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5916668A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2718070A1 (en) * | 1994-03-31 | 1995-10-06 | Lorraine Laminage | Plasma torch support for sheet metal cutting machine. |
EP2277653A1 (en) * | 2009-07-16 | 2011-01-26 | Kjellberg-Stiftung | Method for determining the distance between an autogenous burner device and a workpiece through measuring an electric parameter without providing a proper electric energy supply |
CN102513752A (en) * | 2012-01-06 | 2012-06-27 | 昆山海大数控技术有限公司 | Detection device of intersection line cutting machine |
WO2013108966A1 (en) * | 2012-01-18 | 2013-07-25 | 현대중공업 주식회사 | Pipe welding device |
CN117548796A (en) * | 2024-01-11 | 2024-02-13 | 中科精密钢管(山东)有限公司 | Self-adaptive real-time length measuring device for spiral welded pipe cutting |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5178765A (en) * | 1974-12-04 | 1976-07-08 | Caterpillar Tractor Co | Purazumaaakutoochi no kankakuseigyohoho oyobi sochi |
JPS5564974A (en) * | 1978-11-11 | 1980-05-16 | Messer Griesheim Gmbh | Method of automatically adjusting initial height of cutting torch from work and its device |
-
1983
- 1983-03-07 JP JP3595283A patent/JPS5916668A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5178765A (en) * | 1974-12-04 | 1976-07-08 | Caterpillar Tractor Co | Purazumaaakutoochi no kankakuseigyohoho oyobi sochi |
JPS5564974A (en) * | 1978-11-11 | 1980-05-16 | Messer Griesheim Gmbh | Method of automatically adjusting initial height of cutting torch from work and its device |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2718070A1 (en) * | 1994-03-31 | 1995-10-06 | Lorraine Laminage | Plasma torch support for sheet metal cutting machine. |
WO1995026853A1 (en) * | 1994-03-31 | 1995-10-12 | Sollac | Plasma torch holder for a sheet metal cutting machine |
EP2277653A1 (en) * | 2009-07-16 | 2011-01-26 | Kjellberg-Stiftung | Method for determining the distance between an autogenous burner device and a workpiece through measuring an electric parameter without providing a proper electric energy supply |
CN102513752A (en) * | 2012-01-06 | 2012-06-27 | 昆山海大数控技术有限公司 | Detection device of intersection line cutting machine |
WO2013108966A1 (en) * | 2012-01-18 | 2013-07-25 | 현대중공업 주식회사 | Pipe welding device |
CN103429379A (en) * | 2012-01-18 | 2013-12-04 | 现代重工业株式会社 | Pipe welding device |
US8770461B2 (en) | 2012-01-18 | 2014-07-08 | Hyundai Heavy Industries Co., Ltd. | Pipe welding apparatus |
CN117548796A (en) * | 2024-01-11 | 2024-02-13 | 中科精密钢管(山东)有限公司 | Self-adaptive real-time length measuring device for spiral welded pipe cutting |
CN117548796B (en) * | 2024-01-11 | 2024-03-29 | 中科精密钢管(山东)有限公司 | Self-adaptive real-time length measuring device for spiral welded pipe cutting |
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