JPH0760459A - Method and device for detecting welding position of ERW pipe - Google Patents
Method and device for detecting welding position of ERW pipeInfo
- Publication number
- JPH0760459A JPH0760459A JP20977493A JP20977493A JPH0760459A JP H0760459 A JPH0760459 A JP H0760459A JP 20977493 A JP20977493 A JP 20977493A JP 20977493 A JP20977493 A JP 20977493A JP H0760459 A JPH0760459 A JP H0760459A
- Authority
- JP
- Japan
- Prior art keywords
- electric resistance
- resistance welded
- pipe
- welded pipe
- eddy current
- 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- Withdrawn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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
(57)【要約】
【目的】造管後ある程度時間を経ても、また熱処理をし
たものであっても、電縫管の溶接部位置を、高精度で安
定して検出することを目的とする。
【構成】電縫管をターニングローラで回転させながら、
電縫管の内面の位置を高精度レーザ変位計で計測し、さ
らに同位置に対向する外面の位置を徴細な変動は捕らえ
ないが管の偏芯や振動を捕らえるのに充分な精度をもっ
た渦電流式変位計で計測する。両計測値の差をとること
により、管の偏芯や振動を含まない正味の内面の凹凸を
抽出し、この差に基づいて溶接位置を検出する。
(57) [Summary] [Purpose] The purpose is to detect the welded position of the electric resistance welded pipe with high accuracy and stability, even after a certain amount of time has passed after pipe making and after heat treatment. . [Structure] While rotating the electric resistance welded pipe with a turning roller,
The position of the inner surface of the electric resistance welded pipe is measured with a high-precision laser displacement meter, and the position of the outer surface facing the same position can be detected without minute fluctuations, but with sufficient accuracy to detect eccentricity or vibration of the pipe. Eddy current displacement meter. By taking the difference between the two measured values, the net inner surface unevenness that does not include eccentricity or vibration of the pipe is extracted, and the welding position is detected based on this difference.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電縫管の溶接部検査
工程の自動化および精度向上のための溶接位置検出方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding position detecting method for automating a welding portion inspection process of an electric resistance welded pipe and improving accuracy.
【０００２】[0002]
【従来の技術】電縫管の溶接部の自動検査例えば自動探
傷では、まず電縫管の溶接部の、管周上の位置を検出す
る必要がある。例えば鋼管をその周方向に回転駆動する
ロ−ラ上に電縫管を載せて回転させて溶接部を検出し、
該溶接部が所定の位置に達したときに回転止めて、該位
置を自動探傷する。この自動探傷の信頼性を確保するに
は、まず溶接部位置の正確な検出が必要である。従来の
溶接位置検出方法としては、様々な方法が知られている
が例えば、材質の差異を渦電流の変化で検出する渦流探
傷方式、外削による光沢変化をＣＣＤカメラで検知する
光学方式、あるいは特開昭５６−１４８０５４号公報に
開示の如く横波電磁超音波を入射しその反射波の溶接部
メタルフローによる減衰を検出する方式等がある。2. Description of the Related Art In automatic inspection of a welded portion of an electric resistance welded pipe, for example, in automatic flaw detection, it is first necessary to detect the position of the welded portion of the electric resistance welded pipe on the circumference of the pipe. For example, a welded portion is detected by placing an electric resistance welded pipe on a roller that rotationally drives the steel pipe in its circumferential direction, and detecting the welded portion.
When the weld reaches a predetermined position, rotation is stopped and the position is automatically detected. In order to ensure the reliability of this automatic flaw detection, it is first necessary to accurately detect the position of the welded portion. As a conventional welding position detecting method, various methods are known, for example, an eddy current flaw detection method that detects a difference in material by a change in eddy current, an optical method that detects a gloss change due to external cutting with a CCD camera, or As disclosed in Japanese Unexamined Patent Publication No. 56-148054, there is a system in which a transverse electromagnetic ultrasonic wave is incident and the attenuation of the reflected wave due to a metal flow in a welded portion is detected.
【０００３】[0003]
【発明が解決しようとする課題】溶接部検査工程は溶接
部の冷接欠陥等の溶接欠陥の有無を検査するものである
が、電縫管を熱処理した後は、熱処理により溶接部材質
が母材と同化するため渦流探傷方式で溶接部を検出する
ことができず、また光学方式においても造管直後の様に
切削跡が鮮明でなく溶接位置を精度良く検出することが
できない。The welding portion inspection step is for inspecting the presence or absence of welding defects such as cold welding defects in the welded portion. Since it is assimilated with the material, the eddy current flaw detection method cannot detect the welded portion, and even with the optical method, the cutting trace is not clear and the welding position cannot be accurately detected as immediately after pipe forming.
【０００４】そこで本発明は、この様な問題を解消し、
造管後ある程度時間を経ても、また熱処理をしたもので
あっても、高精度で安定して溶接位置を検出することを
目的とする。Therefore, the present invention solves such a problem,
An object of the present invention is to detect a welding position with high accuracy and stability even after a certain time has passed after pipe forming or even after heat treatment.
【０００５】[0005]
【課題を解決するための手段】本発明では、溶接部を切
削した電縫管を回転させ、レーザ変位計で内面位置変動
を測定し、渦電流式変位計で外面位置変動を測定し、内
外面の変動の差を信号処理して切削による凹凸から溶接
部を検出する。According to the present invention, an electric resistance welded pipe having a welded portion is rotated, an inner surface position variation is measured by a laser displacement gauge, and an outer surface position variation is measured by an eddy current displacement gauge. The difference between the fluctuations of the outer surface is signal-processed to detect the welded portion from the unevenness caused by cutting.
【０００６】[0006]
【作用】図４には、代表的な電縫管の横断面形状を示
す。電縫溶接直後には、溶接部に盛り上り３があるが、
この部分は切削され、凹凸が小さくなっている。２が溶
接部すなわち母材の継目部であるが、熱処理により溶接
部材質が母材と同化している。本発明では、溶接部の凹
凸に着目して、溶接部を切削した電縫管を回転させ、レ
ーザ変位計で内面位置変動を測定する。レ−ザ変位計の
測定信号は、レ−ザ変位計から電縫管内面の半径方向の
距離すなわち位置を表わすものとなる。また、渦電流式
変位計で外面位置変動を測定するので、渦電流式変位計
の測定信号は、渦電流式変位計から電縫管外面の半径方
向の距離すなわち位置を表わすものとなる。したがって
両測定信号の差は、電縫管の厚みに対応したものとな
る。電縫管が回転している間、この差を表わす信号（差
信号）は、厚み対応のレベル変化を示す。溶接部２で
は、他の部分にない凹凸があり、そこでは差信号が凹凸
に対応したレベル変動を示すので、このレベル変動が溶
接部２を表わすことになる。なお、本発明は、溶接部の
切削の前の、盛り上り３がある場合にも、同様に溶接部
２（正確には盛り上り３）を検出できる。FIG. 4 shows a cross sectional shape of a typical electric resistance welded pipe. Immediately after ERW welding, there is a swell 3 in the weld,
This part is cut and the unevenness is reduced. Reference numeral 2 is a welded portion, that is, a joint portion of the base material, but the quality of the welded member is assimilated with the base material by heat treatment. In the present invention, paying attention to the unevenness of the welded portion, the electric resistance welded pipe that cuts the welded portion is rotated, and the internal displacement of the inner surface is measured with a laser displacement meter. The measurement signal of the laser displacement meter represents the radial distance or position of the inner surface of the electric resistance welded pipe from the laser displacement meter. Further, since the outer surface position variation is measured by the eddy current type displacement gauge, the measurement signal of the eddy current type displacement gauge represents the radial distance or position of the outer surface of the electric resistance welded pipe from the eddy current type displacement gauge. Therefore, the difference between the two measurement signals corresponds to the thickness of the electric resistance welded pipe. While the electric resistance welded pipe is rotating, the signal representing this difference (difference signal) shows a level change corresponding to the thickness. In the welded portion 2, there is unevenness that is not present in the other portion, and since the difference signal shows the level fluctuation corresponding to the unevenness, this level fluctuation represents the welded portion 2. It should be noted that the present invention can detect the welded portion 2 (correctly, the raised portion 3) in the same manner even when there is the raised portion 3 before the cutting of the welded portion.
【０００７】電縫管内面の距離のみを変位計で測定する
場合には、電縫管の偏芯や振動により、溶接部の検出精
度が低下するが、本発明では、外面の距離を測定して
内，外面変位量の差分に基づいて溶接部検出を行なうの
で、すなわちこの差分は電縫管の偏芯や振動による検出
距離偏差を内，外間で相殺したものとなるので、電縫管
の偏芯や振動による検出精度の低下を実質上生じない。
例えば、電縫管内面の距離を分解能５μmw程度のレーザ
変位計で測定し、さらに同位置の外面の距離を、微細な
変動は捕らえられないが管の偏芯や振動を捕らえるのに
充分な精度をもった渦電流式変位計で測定することによ
り、管の偏芯や振動に実質上影響されない厚み信号（差
信号）が得られる。When only the distance on the inner surface of the electric resistance welded pipe is measured by the displacement gauge, the accuracy of detecting the welded portion is lowered due to the eccentricity and vibration of the electric resistance welded pipe. However, in the present invention, the distance on the outer surface is measured. Since the welded part is detected based on the difference between the inner and outer displacements, that is, this difference cancels out the detection distance deviation due to eccentricity and vibration of the electric resistance welded pipe, and thus Substantially no decrease in detection accuracy due to eccentricity or vibration.
For example, the distance on the inner surface of the electric resistance welded pipe is measured with a laser displacement meter with a resolution of about 5 μmw, and the distance on the outer surface at the same position is accurate enough to capture eccentricity and vibration of the pipe, although minute fluctuations cannot be captured. The thickness signal (difference signal) that is substantially unaffected by the eccentricity or vibration of the pipe can be obtained by measuring with an eddy current type displacement gauge having.
【０００８】本発明ではこのように、疵や錆の影響を受
けにくい内面の微細な位置変動をレ−ザ変位計で捕え、
外面の大まかな位置変動を渦電流式変位計で捕え、両者
の差をとることにより、管の偏芯や振動を除去した正味
の内面の凹凸を抽出し、これを信号処理することにより
溶接位置を検出する。In the present invention, the fine displacement of the inner surface, which is hardly affected by flaws and rust, is detected by the laser displacement meter.
An eddy current displacement gauge is used to detect rough position changes on the outer surface, and the difference between the two is taken to extract the net unevenness on the inner surface that eliminates eccentricity and vibration of the pipe. To detect.
【０００９】[0009]
【実施例】図１に本発明の一実施例を示す。この図１は
電縫管１の端面を見た正面図である。４はレーザ変位
計、５は渦電流式変位計、６はターニングローラ、７は
信号処理装置である。図２に、電縫管１，レーザ変位計
４および渦電流式変位計５の相対位置関係を示す。FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of the end face of the electric resistance welded pipe 1. Reference numeral 4 is a laser displacement meter, 5 is an eddy current displacement meter, 6 is a turning roller, and 7 is a signal processing device. FIG. 2 shows a relative positional relationship between the electric resistance welded pipe 1, the laser displacement meter 4 and the eddy current displacement meter 5.
【００１０】ターニングローラ６により電縫管１が管周
方向に回転駆動され、レ−ザ変位計４がそれと電縫管１
の内面との距離を表わす電気信号を信号処理装置７に与
え、渦電流式変位計５がそれと電縫管１の外面との距離
を表わす電気信号を信号処理装置７に与える。なお、レ
ーザ変位計４はレーザ光を電縫管１の内面に照射し、そ
の拡散反射光から、該距離を検出しこれを表わす電気信
号（内面距離信号）を発生する。これを図３の（ａ）に
示す。一方、渦電流式変位計５は、高周波磁界による金
属表面の渦電流の大きさから距離を検出しそれを表わす
電気信号（外面距離信号）を発生する。これを図３の
（ｂ）に示す。レ−ザ変位計４の、電縫管１の内面上の
測定位置と、電縫管１の中心とを結ぶ直線が、電縫管１
の外面と交わる位置が渦電流式変位計５の測定位置とな
っている。The electric resistance welded pipe 1 is rotationally driven in the peripheral direction by the turning roller 6, and the laser displacement gauge 4 and the electric resistance welded pipe 1 are driven by the laser displacement gauge 4.
To the signal processing device 7, and the eddy current displacement gauge 5 provides the signal processing device 7 with an electrical signal representing the distance between it and the outer surface of the electric resistance welded pipe 1. The laser displacement meter 4 irradiates the inner surface of the electric resistance welded tube 1 with laser light, detects the distance from the diffused reflected light, and generates an electric signal (inner surface distance signal) indicating the distance. This is shown in FIG. On the other hand, the eddy current displacement meter 5 detects the distance from the magnitude of the eddy current on the metal surface due to the high frequency magnetic field and generates an electric signal (outer surface distance signal) representing the distance. This is shown in FIG. The straight line connecting the measurement position on the inner surface of the electric resistance welded pipe 1 of the laser displacement meter 4 and the center of the electric resistance welded pipe 1 is the electric resistance welded pipe 1
The position intersecting with the outer surface of is the measurement position of the eddy current displacement gauge 5.
【００１１】信号処理装置７は、移動平均処理により内
面距離信号と外面距離信号の高周波ノイズ成分を除去
し、そしてそれらの差を演算する。差を表わす信号を図
３の（ｃ）に示す。この信号は、電縫管１の変位計４／
５間の管厚に対応するレベルとなり、電縫管１の回転に
よる変位計４／間の管厚変動に伴って変動する。したが
って差を表わす信号は管内面の凹凸を表わす。管内面上
の、溶接部２切削を施した溶接部２は、切削により局所
的に比較的に鋭い凹凸となっているので、その部位に対
応する、差を表わす信号のレベル変動が、急俊である。
この実施例に着目して、この実施例では、信号処理装置
７で差を表わす信号を微分し、微分値の絶対値を表わす
信号を生成する。この微分値を表わす信号を図３の
（ｄ）に示す。信号処理装置７は、この微分値を表わす
信号を２値化して、溶接位置で高レベルＨ、他部では低
レヘルＬの信号すなわち溶接部検出信号を発生する。The signal processing device 7 removes high frequency noise components of the inner surface distance signal and the outer surface distance signal by moving average processing, and calculates the difference between them. The signal representing the difference is shown in FIG. This signal is the displacement gauge 4 /
It becomes a level corresponding to the pipe thickness between 5 and it changes with the displacement of the displacement gauge 4 / due to the rotation of the electric resistance welded pipe 1. Therefore, the signal representing the difference represents irregularities on the inner surface of the tube. Since the welded portion 2 on the inner surface of the pipe, which has been subjected to the cutting of the welded portion 2, has a relatively sharp unevenness locally due to the cutting, the level fluctuation of the signal representing the difference corresponding to that portion is abrupt. Is.
Focusing on this embodiment, in this embodiment, the signal representing the difference is differentiated by the signal processing device 7, and a signal representing the absolute value of the differential value is generated. A signal representing this differential value is shown in FIG. The signal processing device 7 binarizes the signal representing the differential value to generate a high level H signal at the welding position and a low rehearsal L signal at other portions, that is, a weld portion detection signal.
【００１２】以上に説明した図２，図１に示した装置を
用いて、電縫管（外径１３９．８mm）を５０mm／secで
管周方向に回転させて溶接部検出を行なった。図３はそ
のとき得られた信号を示す。内面距離信号（ａ）は波長
６７０mm、出力１mW、スポット径２００μｍ、サンプリ
ング周期４msecのレーザ変位計４により得られたもの、
外面距離信号（ｂ）は検出距離１０mm、測定面積約２２
mmφの渦電流変位計５により得られたものである。信号
処理装置７が信号（ａ）と（ｂ）の差をとって差信号
（ｃ）を得て、微分信号（ｄ）を生成した。差信号
（ｃ）は、電縫管１の偏芯や振動の成分を実質上含ま
ず、溶接部の凹凸をよく表わすものである。微分信号
（ｄ）は切削部すなわち溶接部２で大きな変化を示し、
これにより溶接位置を明確に判定しうる。Using the apparatus shown in FIGS. 2 and 1 described above, the welded portion was detected by rotating the electric resistance welded pipe (outer diameter 139.8 mm) in the pipe circumferential direction at 50 mm / sec. FIG. 3 shows the signal obtained at that time. The inner surface distance signal (a) is obtained by a laser displacement meter 4 having a wavelength of 670 mm, an output of 1 mW, a spot diameter of 200 μm, and a sampling period of 4 msec.
The outer surface distance signal (b) has a detection distance of 10 mm and a measurement area of about 22.
It is obtained by the eddy current displacement meter 5 of mmφ. The signal processing device 7 took the difference between the signals (a) and (b) to obtain the difference signal (c) and generated the differential signal (d). The difference signal (c) substantially does not include eccentricity or vibration components of the electric resistance welded pipe 1, and represents the unevenness of the welded portion well. The differential signal (d) shows a large change in the cutting portion, that is, the welding portion 2,
This makes it possible to clearly determine the welding position.
【００１３】[0013]
【発明の効果】以上説明した本発明によれば、精度良く
溶接位置を検出することが可能となり、従って、溶接部
検査工程である水圧試験、ＵＳＴ、偏平試験等において
高精度な溶接部位置合わせを自動的に行えるものであ
り、その効果は極めて大きいものである。According to the present invention described above, it is possible to detect the welding position with high accuracy, and therefore the welding position can be accurately adjusted in the welding test process such as the water pressure test, UST, and flatness test. Can be performed automatically, and its effect is extremely large.
【図１】 本発明の一実施例の外観を示す正面図であ
る。FIG. 1 is a front view showing the appearance of an embodiment of the present invention.
【図２】 図１に示すレ−ザ変位計４および渦電流式変
位計５の外観を示す斜視図である。FIG. 2 is a perspective view showing appearances of a laser displacement meter 4 and an eddy current displacement meter 5 shown in FIG.
【図３】 図１に示す実施例による測定結果を示すグラ
フであり、（ａ）はレーザ変位計４によるパイプ１内面
の基準円から内側への変動量検出値を、（ｂ）は渦電流
式変位計５によるパイプ１外面の基準円から外方への変
動量検出値を、（ｃ）は（ａ）に示す検出値と（ｂ）に
示す検出値との差を、（ｄ）は該差を表わす信号を処理
した信号のレベルを示す。3A and 3B are graphs showing measurement results according to the embodiment shown in FIG. 1, in which FIG. 3A is a detection value of fluctuation amount from the reference circle to the inside of the inner surface of the pipe 1 by the laser displacement meter 4, and FIG. 3B is an eddy current. The detected value of the amount of variation from the reference circle on the outer surface of the pipe 1 by the displacement meter 5 is (c) the difference between the detected value shown in (a) and the detected value shown in (b), and (d) is The level of the signal obtained by processing the signal representing the difference is shown.
１：パイプ ２：溶接部 ３：切削部 ４：レーザ変位
計 ５：渦電流式変位計 ６：ターニング
ローラ ７：信号処理装置1: Pipe 2: Welded part 3: Cutting part 4: Laser displacement meter 5: Eddy current displacement meter 6: Turning roller 7: Signal processing device
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年１２月２８日[Submission date] December 28, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】 本発明の一実施例の外観を示す正面図であ
る。FIG. 1 is a front view showing the appearance of an embodiment of the present invention.
【図２】 図１に示すレ−ザ変位計４および渦電流式変
位計５の外観を示す斜視図である。FIG. 2 is a perspective view showing appearances of a laser displacement meter 4 and an eddy current displacement meter 5 shown in FIG.
【図３】 図１に示す実施例による測定結果を示すグラ
フであり、（ａ）はレーザ変位計４によるパイプ１内面
の基準円から内側への変動量検出値を、（ｂ）は渦電流
式変位計５によるパイプ１外面の基準円から外方への変
動量検出値を、（ｃ）は（ａ）に示す検出値と（ｂ）に
示す検出値との差を、（ｄ）は該差を表わす信号を処理
した信号のレベルを示す。 3A and 3B are graphs showing measurement results according to the embodiment shown in FIG. 1, in which FIG. 3A is a detection value of fluctuation amount from the reference circle to the inside of the inner surface of the pipe 1 by the laser displacement meter 4, and FIG. 3B is an eddy current. The detected value of the amount of variation from the reference circle on the outer surface of the pipe 1 by the displacement meter 5 is (c) the difference between the detected value shown in (a) and the detected value shown in (b), and (d) is The level of the signal obtained by processing the signal representing the difference is shown.
【図４】 代表的な電縫管の横断面を示す断面図であFIG. 4 is a sectional view showing a cross section of a typical electric resistance welded pipe.
る。It
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０１Ｂ 21/20 Ｄ Ｇ０１Ｎ 29/10 ５０５ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location G01B 21/20 D G01N 29/10 505
Claims (3)
位置変動を測定し、渦電流式変位計で外面位置変動を測
定し、これら内外面の変動の差を信号処理して溶接部を
表わす電気信号を得ることを特徴とする電縫管の溶接位
置検出方法。1. A welded portion is obtained by rotating an electric resistance welded pipe, measuring a change in the inner surface position with a laser displacement gauge, measuring a change in the outer surface position with an eddy current type displacement gauge, and processing the difference between the change in the inner and outer surfaces. A method for detecting the welding position of an electric resistance welded pipe, characterized in that an electric signal indicating
縫管の内面の周方向各点の半径方向の位置を検出し、か
つ渦電流式変位計で該電縫管の外面の周方向各点の半径
方向の位置を検出し、これら内面の位置と外面の位置よ
り該電縫管の周方向各点の厚みを演算して、溶接部の厚
み変動部を検出する、電縫管の溶接位置検出方法。2. The electric resistance welded pipe is rotated, the radial position of each circumferential point on the inner surface of the electric resistance welded pipe is detected by a laser displacement gauge, and the outer surface of the electric resistance welded pipe is detected by an eddy current displacement gauge. Detecting the radial position of each point in the circumferential direction and calculating the thickness of each point in the circumferential direction of the electric resistance welded pipe from the position of the inner surface and the position of the outer surface to detect the thickness variation portion of the welded portion. Pipe welding position detection method.
前記電縫管の内面の距離を検出するレーザ変位計；前記
電縫管の外面の距離を検出する渦電流式変位計；およ
び、 前記レ−ザ変位計が検出した距離と渦電流式変位計が検
出した距離より前記電縫管の厚みを演算して溶接部に対
応する厚み変動を表わす電気信号を生成する信号処理手
段；を備える、電縫管の溶接位置検出装置。3. A means for rotationally driving an electric resistance welded pipe in its circumferential direction;
Laser displacement gauge for detecting the distance of the inner surface of the electric resistance welded pipe; Eddy current type displacement gauge for detecting the distance of the outer surface of the electric resistance welded pipe; and Distance and eddy current displacement gauge detected by the laser displacement gauge A welding position detecting device for an electric resistance welded pipe, comprising: signal processing means for calculating the thickness of the electric resistance welded pipe from the distance detected by to generate an electric signal representing a thickness variation corresponding to the welded portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20977493A JPH0760459A (en) | 1993-08-24 | 1993-08-24 | Method and device for detecting welding position of ERW pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20977493A JPH0760459A (en) | 1993-08-24 | 1993-08-24 | Method and device for detecting welding position of ERW pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0760459A true JPH0760459A (en) | 1995-03-07 |
Family
ID=16578392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20977493A Withdrawn JPH0760459A (en) | 1993-08-24 | 1993-08-24 | Method and device for detecting welding position of ERW pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760459A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005249440A (en) * | 2004-03-02 | 2005-09-15 | Nichiden Koshuha Kk | Welding zone detection method and welding zone detection device |
| JP2011043406A (en) * | 2009-08-21 | 2011-03-03 | Jfe Steel Corp | Pipe end joint position detection apparatus of resin-coated pipe and method |
| JP2011106821A (en) * | 2009-11-12 | 2011-06-02 | Mitsubishi Electric Corp | Welding bead measuring method of pipe material, welding bead cutting method, and welding bead cutting apparatus |
| JP2011149777A (en) * | 2010-01-20 | 2011-08-04 | Jfe Steel Corp | Uo steel pipe welding bead position detector |
| WO2012049088A1 (en) * | 2010-10-14 | 2012-04-19 | Siemens Aktiengesellschaft | Method for controlling a spot welding system, including the determination of the position of an inserted element in a hollow member; associated spot welding system |
| KR101360977B1 (en) * | 2012-07-03 | 2014-02-12 | 대우조선해양 주식회사 | Detection System for Seam Area and Roller Effect Area of Pipe |
| CN108016020A (en) * | 2017-12-12 | 2018-05-11 | 河北天昱恒科技有限公司 | Plastic tube automatic detection device |
| CN109959340A (en) * | 2019-04-17 | 2019-07-02 | 吉林工程技术师范学院 | A spiral tube inspection device based on electrical control |
| CN110220487A (en) * | 2019-05-28 | 2019-09-10 | 平高集团有限公司 | Cylinder roundness detection method and cylinder roundness measuring device |
| CN111610196A (en) * | 2019-02-22 | 2020-09-01 | 汉阳Eng株式会社 | Weld bead inspection device for welded pipe |
-
1993
- 1993-08-24 JP JP20977493A patent/JPH0760459A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005249440A (en) * | 2004-03-02 | 2005-09-15 | Nichiden Koshuha Kk | Welding zone detection method and welding zone detection device |
| JP2011043406A (en) * | 2009-08-21 | 2011-03-03 | Jfe Steel Corp | Pipe end joint position detection apparatus of resin-coated pipe and method |
| JP2011106821A (en) * | 2009-11-12 | 2011-06-02 | Mitsubishi Electric Corp | Welding bead measuring method of pipe material, welding bead cutting method, and welding bead cutting apparatus |
| JP2011149777A (en) * | 2010-01-20 | 2011-08-04 | Jfe Steel Corp | Uo steel pipe welding bead position detector |
| US9403230B2 (en) | 2010-10-14 | 2016-08-02 | Siemens Aktiengesellschaft | Method for controlling a spot welding system, including the determination of the position of an inserted element in a hollow member; associated spot welding system |
| WO2012049088A1 (en) * | 2010-10-14 | 2012-04-19 | Siemens Aktiengesellschaft | Method for controlling a spot welding system, including the determination of the position of an inserted element in a hollow member; associated spot welding system |
| KR101360977B1 (en) * | 2012-07-03 | 2014-02-12 | 대우조선해양 주식회사 | Detection System for Seam Area and Roller Effect Area of Pipe |
| CN108016020A (en) * | 2017-12-12 | 2018-05-11 | 河北天昱恒科技有限公司 | Plastic tube automatic detection device |
| CN108016020B (en) * | 2017-12-12 | 2023-10-24 | 河北天昱恒科技有限公司 | Automatic detection device for plastic pipe |
| CN111610196A (en) * | 2019-02-22 | 2020-09-01 | 汉阳Eng株式会社 | Weld bead inspection device for welded pipe |
| CN111610196B (en) * | 2019-02-22 | 2023-10-27 | 汉阳Eng株式会社 | Weld bead inspection device for welded pipes |
| CN109959340A (en) * | 2019-04-17 | 2019-07-02 | 吉林工程技术师范学院 | A spiral tube inspection device based on electrical control |
| CN110220487A (en) * | 2019-05-28 | 2019-09-10 | 平高集团有限公司 | Cylinder roundness detection method and cylinder roundness measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4705479B2 (en) | Bead shape detection method and apparatus | |
| JP2005181134A (en) | Nondestructive testing method for seamed section of electro-resistance-welded tube and probe-type eddy-current flaw detector | |
| JPS5858463A (en) | Non-destructive inspection measuring method for metal structure | |
| CN116858933A (en) | Method for ultrasonically detecting weld quality of stainless steel thin-wall small-diameter pipe by phased array | |
| JPS61111461A (en) | Ultrasonic flaw detecting method of welded part of seam welded pipe | |
| JPH06241740A (en) | ERW pipe weld bead cutting defect / defect detection method | |
| US3873830A (en) | Method and apparatus for monitoring the quality of welds in seamed tubes | |
| CN111522794A (en) | Ultrasonic angle spectrum database establishment method for weld defect type analysis and defect qualitative method based on database | |
| JPH05240621A (en) | Instrument for measuring outer diameter and wall thickness of pipe | |
| CN118425314A (en) | Nondestructive testing method for annular weld defects of pipeline | |
| JPS58160805A (en) | Method for measuring size and shape of large-diameter steel pipe | |
| JP3275988B2 (en) | Butt welding monitoring method and butt welding monitoring device | |
| JP2985740B2 (en) | Pipe end detector for automatic flaw detector | |
| JP2008151588A (en) | Flaw evaluation method of two-layered bellows and eddy current flaw detector used therein | |
| Reichert | Pre-and postweld inspection using laser vision | |
| JPH0387606A (en) | Method and device for measuring automatically tubular article | |
| JP2001330594A (en) | Inspection method of metal pipe joint | |
| JPH05154510A (en) | Method and apparatus for detecting weld shape during butt welding | |
| JP2913600B2 (en) | Surface inspection of nuclear fuel cladding | |
| JP2000141198A (en) | Method and apparatus for automatic grinding of defects in round bars | |
| Verschinin et al. | Detection of Charge Welds in Lateral Angular Co-Extrusion Using Non-Destructive Testing | |
| JP2002122573A (en) | Defect inspection method and device for round material | |
| JP2000111328A (en) | Method for inspecting welding part of welding pipe | |
| JPS6123584A (en) | Bead cut inspecting apparatus | |
| JPS6410777B2 (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: 20001031 |