JPS61243358A - Confirmation of following accuracy of ultrasonic flaw detection head at weld part of seam welded pipe - Google Patents
Confirmation of following accuracy of ultrasonic flaw detection head at weld part of seam welded pipeInfo
- Publication number
- JPS61243358A JPS61243358A JP60085294A JP8529485A JPS61243358A JP S61243358 A JPS61243358 A JP S61243358A JP 60085294 A JP60085294 A JP 60085294A JP 8529485 A JP8529485 A JP 8529485A JP S61243358 A JPS61243358 A JP S61243358A
- Authority
- JP
- Japan
- Prior art keywords
- flaw detection
- detection head
- steel pipe
- center
- weld part
- 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
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、電縫鋼管溶接部に対する超音波探傷ヘッドの
追従精度確認方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for checking the tracking accuracy of an ultrasonic flaw detection head for a welded portion of an ERW steel pipe.
「従来の技術」
電縫鋼管溶接部に対する超音波探傷検査にあっては、探
傷精度を高くするために、溶接部に対する探触子の距離
を一定に保って探傷ヘッドを走査させることが重要であ
る。"Conventional technology" In ultrasonic flaw detection inspection of ERW steel pipe welds, it is important to keep the distance of the probe to the weld constant and scan the flaw detection head in order to improve the flaw detection accuracy. be.
従来、電縫鋼管の溶接部と探触子との距離を一定に保つ
よう探傷ヘッドを走査させる手段としては、例えば実開
昭５９−１５５５イ９号公報に開示されている如く、溶
接部と平行にマークしたマーク線を検出装置によって検
出することにより溶接位置を自動的に割り出し、鋼管の
回転装置を制御しなから探触子保持部（探傷ヘッド）を
、マーク線と平行で、かつ一定の位置能れた線上を走査
させることによって、溶接部に対する探触子の位置決め
を行いながら探傷するようにしている。Conventionally, as a means for scanning a flaw detection head so as to maintain a constant distance between a welded part of an ERW steel pipe and a probe, as disclosed in Japanese Utility Model Application Publication No. 1555-9 of 1983, The welding position is automatically determined by detecting the parallel mark lines with a detection device, and the welding position is automatically determined by controlling the steel pipe rotating device and moving the probe holding part (flaw detection head) parallel to the mark lines and at a constant position. By scanning the line on which the probe has been positioned, flaw detection is performed while positioning the probe relative to the weld.
「発明が解決しようとする問題点」
ところで、前記従来の超音波探傷装置にあっては、探傷
ヘッドの電縫鋼管溶接部に対する走査精度（追従精度）
を定量的に確認する手段は全くなく、従って探傷精度の
信頼性に劣る問題点があった。"Problems to be Solved by the Invention" By the way, in the conventional ultrasonic flaw detection device, the scanning accuracy (following accuracy) of the flaw detection head for the welded portion of the ERW steel pipe is limited.
There was no means to quantitatively confirm this, and therefore there was a problem in that the reliability of flaw detection accuracy was poor.
「問題点を解決するための手段」
本発明は、前記従来の問題点を解決すべくなしたもので
ある。"Means for Solving the Problems" The present invention has been made to solve the above-mentioned conventional problems.
すなわち、本発明は、電縫鋼管の溶接部を自動追従して
検査する超音波探傷装置における探傷ヘッドの前面中心
から左右所定位置に垂設したケガキ針によって、探傷中
の電縫鋼管の表面上にケガキ線を連続的にかき、探傷作
業終了後、真の溶接部中心と前記ケガキ線との距離を測
定し、この測定値と、前記探傷ヘッド中心からケガキ針
までの距離とを比較して偏差値を求め、この偏差値から
電縫鋼管溶接部に対する超音波探傷ヘッドの追従精度を
確認するようにしたことを要旨とするものである。That is, the present invention uses scribing needles vertically installed at predetermined positions on the left and right from the center of the front surface of the flaw detection head in an ultrasonic flaw detection device that automatically tracks and inspects the welded portion of an ERW steel pipe. After completing the flaw detection work, measure the distance between the true center of the weld and the scribe line, and compare this measured value with the distance from the center of the flaw detection head to the scribe needle. The gist of this method is to obtain a deviation value and check the tracking accuracy of an ultrasonic flaw detection head for a welded portion of an ERW steel pipe from this deviation value.
「実施例」 以下に本発明の実施例を図面に基づき説明する。"Example" Embodiments of the present invention will be described below based on the drawings.
第１図は電縫鋼管ｌの溶接部１ａを検査する超音波探傷
装置における探傷機構部の概略を示すものであって、こ
の探ｆ！ｔｉｌｌ構部は、図示してない搬送用ローラー
Ｅを搬送される電ｆｆ１ｍ管１の上方においてその長手
方向と直交して左右方向に移動制御される支持架橋２と
、この支持架橋２の前面に設けられ、上下動制御される
センター合わせ昇降板３と、このセンター合わせ昇降板
３の前面に設けられた円弧状板４と１、この円弧状板４
の前面に設けられ、上下動制御される半径合わせ昇降＠
５と、この半径合わせ昇降板５の前面に１＆端が軸支さ
れ上下方向に回動するリンク６と、このリンク６の前端
に軸支され、前後および左右方向に回動する探傷ヘッド
７と、この探傷ヘッド７にその中心に対して所定値１と
なるよう取付けられた探触子８とからなる。FIG. 1 schematically shows a flaw detection mechanism in an ultrasonic flaw detection device that inspects a welded portion 1a of an ERW steel pipe l. The till structure includes a support bridge 2 that is controlled to move in the left-right direction orthogonal to the longitudinal direction above the electric ff1m tube 1 that is conveyed by a conveyance roller E (not shown), and a support bridge 2 that is controlled to move in the left-right direction perpendicular to the longitudinal direction of the tube 1, which is conveyed by a conveyance roller E (not shown), and a support bridge 2 that is controlled to move in the left-right direction perpendicular to its longitudinal direction. A centering lift plate 3 that is provided and whose vertical movement is controlled, arc-shaped plates 4 and 1 provided on the front surface of this center alignment lift plate 3, and this arc-shaped plate 4.
Radius matching lift @ which is installed on the front of the
5, a link 6 whose 1&end is pivotally supported on the front surface of the radius adjustment elevating plate 5 and rotates in the vertical direction, and a flaw detection head 7 that is pivotally supported on the front end of this link 6 and rotates in the front-back and left-right directions. , and a probe 8 attached to the flaw detection head 7 so as to have a predetermined value of 1 with respect to the center thereof.
前記支持架橋２、センター合わせ昇降板３は、前記円弧
状板４を電縫鋼管１の上方において電縫鋼管ｌと同心円
的に位置させるためのものであって、円弧状板４が電縫
鋼管ｌの上方において電縫鋼管ｌと同心円的に位置され
ることにより、前記半径合わせ昇降Ｆｉ５、リンク６を
介して探傷へ・ンド７は、電縫鋼管１上において同心円
的に移動し、溶接部１ａに対する追従動作時に、探傷ヘ
ッド７と電縫鋼管ｌとの相対位置が一定に保たれるよう
になっている。The support bridge 2 and the centering lift plate 3 are for positioning the arcuate plate 4 above the ERW steel pipe 1 and concentrically with the ERW steel pipe 1, and the arcuate plate 4 is located above the ERW steel pipe 1. By being positioned concentrically with the ERW steel pipe 1 above the ERW steel pipe 1, the flaw detection end 7 moves concentrically on the ERW steel pipe 1 via the radius adjustment lift Fi5 and the link 6, and detects the welded portion. The relative position between the flaw detection head 7 and the electric resistance welded steel pipe 1 is kept constant during the following operation relative to 1a.
なお、前記支持架橋２の左右方向の移動制御−センター
合わせ昇降板３の上下動制御、半径合わせ昇降板５の上
下動制御等の一連の制御、すなわち溶接部１ａに対する
探傷ヘッド７の自動追従制御手段は、第１図には示して
いないが、従来の光学的あるいは磁気的等の自動追従制
御手段を用いるものとする。In addition, a series of controls such as horizontal movement control of the support bridge 2, vertical movement control of the center alignment lifting plate 3, vertical movement control of the radius alignment lifting plate 5, etc., that is, automatic tracking control of the flaw detection head 7 with respect to the welded part 1a. Although not shown in FIG. 1, conventional automatic tracking control means such as optical or magnetic is used.
前記探傷ヘッド７の前面中心から左右所定位置には、第
２図にも示す如く、ホルダー９を介してケガキ針１０が
垂設されている。As shown in FIG. 2, a scribing needle 10 is vertically disposed at a predetermined position on the left and right sides of the center of the front surface of the flaw detection head 7 via a holder 9.
なお、前記ケガキ針１０は、第３図に示す如く、ホルダ
ー９内に介装されているスプリング１１により、一定の
圧下刃にて電に１鋼管１の表面へ当接させる方が好まし
い。As shown in FIG. 3, it is preferable that the scribing needle 10 is brought into contact with the surface of the steel pipe 1 using a constant reduction blade by means of a spring 11 interposed in the holder 9.
前記ケガキ針１０は、探信中の電縫鋼管１における溶接
部１ａの左右の表面上にケガキ線を連続的にかくもので
ある。The marking needle 10 is used to continuously draw marking lines on the left and right surfaces of the welded portion 1a of the electric resistance welded steel pipe 1 being probed.
しかして、前記ケガキ針ＩＯにより、探傷中の電縫鋼管
１における／８接部１ａの左右の表面上にケガキ線を連
続的にかき、探傷作業終了後に、真の溶接部１ａの中心
をエツチング等により求め、この真のｆ４接部１ａの中
心と前記ケガキ線との距離を測定し、この測定値と、予
め知得している前記探傷ヘッド７の中心からケガキ針Ｉ
Ｏまでの距離とを比較して偏差値を求め、この偏差値か
ら溶接部１ａに対する探傷ヘッド７の追従精度を確認判
定するのである。Then, using the marking needle IO, marking lines are continuously drawn on the left and right surfaces of the /8 joint 1a of the ERW steel pipe 1 under flaw detection, and after the flaw detection is completed, the center of the true welded part 1a is etched. etc., measure the distance between the center of this true f4 contact part 1a and the marking line, and use this measurement value and the marking needle I from the center of the flaw detection head 7, which is known in advance.
A deviation value is obtained by comparing the distance to O, and the tracking accuracy of the flaw detection head 7 with respect to the welded part 1a is confirmed and determined from this deviation value.
前記偏差値は、溶接部検出装置の精度と、溶接部追従装
置の精度の総合値である。The deviation value is a total value of the accuracy of the weld detection device and the accuracy of the weld tracking device.
なお、前記ケガキ針ｌＯを２本設けた理由は、搬送され
ている電縫鋼管１の左右、上下の複雑な振動ある。いは
電縫鋼管１の真円度の程度等により、ケガキ針ｌＯの１
本または２本ともが振られ、ケガキ線間の距離が一定で
ない場合、そのケガキ線は、前記探傷ヘッド７の追従精
度を確認する上では無効であると判断し易いためである
。The reason why the two scribing needles 1O are provided is because of the complicated horizontal and vertical vibrations of the electric resistance welded steel pipe 1 being conveyed. Or, depending on the degree of roundness of the ERW steel pipe 1, use a scriber needle lO.
This is because if the book or both are shaken and the distance between the marking lines is not constant, it is easy to judge that the marking lines are invalid for checking the tracking accuracy of the flaw detection head 7.
また、実施例においては、ケガキ針１０が探傷ヘッド７
に垂設されているが、ケガキ針ｌＯを管中心に向けて取
付けてもよい。In addition, in the embodiment, the scribing needle 10 is connected to the flaw detection head 7.
Although the scribing needle 1O is vertically installed in the tube, the scribing needle 10 may be installed with the scribing needle 10 facing toward the center of the tube.
「発明の効果」
以上述べた如く、本発明方法によれば、探傷ヘッドの電
縫鋼管溶接部に対する追従精度を、極めて容易かつ定量
的に確認判定することができるので、探傷精度の信頼性
を高めることに寄与できる。"Effects of the Invention" As described above, according to the method of the present invention, it is possible to very easily and quantitatively check and judge the tracking accuracy of the flaw detection head for the welded part of the ERW steel pipe, thereby improving the reliability of the flaw detection accuracy. can contribute to increasing
第１図は超音波探傷装置における探傷機構部の本発明実
施例を示す概略斜視図、第２図はケガキ針取付けの態様
を示す正面図、第３図はケガキ針保持の詳細を示す断面
図である。
ｌ・・・電縫鋼管、１ａ・・・溶接部、２・・・支持架
構、３・・・センター合わせ昇降板、４・・・円弧状板
、５・・・半径合わせ昇降板、６・・・リンク、７・・
・探傷ヘッド、８・・・探触子、９・・・ホルダー、１
０・・・ケガキ針、１１・・・スプリング。Fig. 1 is a schematic perspective view showing an embodiment of the present invention of a flaw detection mechanism in an ultrasonic flaw detection device, Fig. 2 is a front view showing how the scribing needle is attached, and Fig. 3 is a sectional view showing details of how the scribing needle is held. It is. l...Erw steel pipe, 1a...Welded part, 2...Support frame, 3...Center alignment lifting plate, 4...Circular arc plate, 5...Radius alignment lifting plate, 6...・・Link, 7・・
・Flaw detection head, 8... Probe, 9... Holder, 1
0...Scoring needle, 11...Spring.
Claims (1)
置における探傷ヘッドの前面中心から左右所定位置に垂
設したケガキ針によって、探傷中の電縫鋼管の表面上に
ケガキ線を連続的にかき、探傷作業終了後、真の溶接部
中心と前記ケガキ線との距離を測定し、この測定値と、
前記探傷ヘッド中心からケガキ針までの距離とを比較し
て偏差値を求めることを特徴とする電縫鋼管溶接部に対
する超音波探傷ヘッドの追従精度確認方法。In an ultrasonic flaw detection device that automatically tracks and inspects welded parts of ERW steel pipes, marking needles placed vertically at predetermined positions on the left and right from the center of the front surface of the flaw detection head continuously mark lines on the surface of the ERW steel pipe being tested. After completing the scratching and flaw detection work, measure the distance between the true weld center and the marking line, and use this measured value and
A method for checking the tracking accuracy of an ultrasonic flaw detection head for a welded part of an ERW steel pipe, the method comprising: calculating a deviation value by comparing the distance from the center of the flaw detection head to a scribing needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60085294A JPS61243358A (en) | 1985-04-19 | 1985-04-19 | Confirmation of following accuracy of ultrasonic flaw detection head at weld part of seam welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60085294A JPS61243358A (en) | 1985-04-19 | 1985-04-19 | Confirmation of following accuracy of ultrasonic flaw detection head at weld part of seam welded pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61243358A true JPS61243358A (en) | 1986-10-29 |
Family
ID=13854559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60085294A Pending JPS61243358A (en) | 1985-04-19 | 1985-04-19 | Confirmation of following accuracy of ultrasonic flaw detection head at weld part of seam welded pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61243358A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213587A (en) * | 2010-04-12 | 2011-10-12 | 上海海隆石油钻具有限公司 | Measuring instrument for transition zone in thickening pipe |
| JP2014062781A (en) * | 2012-09-20 | 2014-04-10 | Daido Steel Co Ltd | Ultrasonic flaw detector |
| CN109557178A (en) * | 2017-09-27 | 2019-04-02 | 鞍钢股份有限公司 | Flat-bulb steel ultrasonic automatic flaw detection apparatus and method of detection |
| CN115980092A (en) * | 2023-03-20 | 2023-04-18 | 宁波吉宁汽车零部件有限公司 | Weld piece check out test set |
| CN117464266A (en) * | 2023-12-27 | 2024-01-30 | 中铁四局集团有限公司 | Welding equipment and welding method for arc-shaped steel box girder plate unit |
-
1985
- 1985-04-19 JP JP60085294A patent/JPS61243358A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213587A (en) * | 2010-04-12 | 2011-10-12 | 上海海隆石油钻具有限公司 | Measuring instrument for transition zone in thickening pipe |
| JP2014062781A (en) * | 2012-09-20 | 2014-04-10 | Daido Steel Co Ltd | Ultrasonic flaw detector |
| CN109557178A (en) * | 2017-09-27 | 2019-04-02 | 鞍钢股份有限公司 | Flat-bulb steel ultrasonic automatic flaw detection apparatus and method of detection |
| CN115980092A (en) * | 2023-03-20 | 2023-04-18 | 宁波吉宁汽车零部件有限公司 | Weld piece check out test set |
| CN117464266A (en) * | 2023-12-27 | 2024-01-30 | 中铁四局集团有限公司 | Welding equipment and welding method for arc-shaped steel box girder plate unit |
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