JPH0360372B2 - - Google Patents
Info
- Publication number
- JPH0360372B2 JPH0360372B2 JP1499985A JP1499985A JPH0360372B2 JP H0360372 B2 JPH0360372 B2 JP H0360372B2 JP 1499985 A JP1499985 A JP 1499985A JP 1499985 A JP1499985 A JP 1499985A JP H0360372 B2 JPH0360372 B2 JP H0360372B2
- Authority
- JP
- Japan
- Prior art keywords
- scanning
- temperature
- butt
- welding
- point
- 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.)
- Expired
Links
- 238000003466 welding Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は電縫鋼管の溶接工程におけるオープン
パイプ突き合せエツジ部の温度測定により突き合
せ角と突き合せ点の位置を測定する測定装置に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a measuring device for measuring the butt angle and the position of the butt point by measuring the temperature of the butt edge portion of an open pipe during the welding process of electric resistance welded steel pipes.
（従来の技術）
従来、電縫鋼管の溶接工程における温度測定装
置としては、特開昭57−79084号「電縫鋼管の溶
接入熱制御方法」の中にワークコイル（またはコ
ンタクトチツプ）と溶接突き合せ点の間の所定位
置におけるエツジ部近傍の金属帯外周面をTVカ
メラで測温する装置や特開昭57−165188号「電縫
鋼管の溶接制御方法」の中にワークコイルと溶接
突き合せ点の間の任意の位置の板肉厚方向の温度
を測温する装置が公知である。(Prior art) Conventionally, as a temperature measuring device in the welding process of ERW steel pipes, a work coil (or contact chip) and a welding device are described in Japanese Patent Application Laid-Open No. 57-79084 "Method for controlling welding heat input of ERW steel pipes". A device that measures the temperature of the outer circumferential surface of the metal strip near the edge at a predetermined position between the abutting points with a TV camera, and a work coil and welding butt are included in JP-A No. 57-165188 ``Welding control method for electric resistance welded steel pipes.'' A device is known that measures the temperature in the thickness direction of a plate at any position between the joining points.
しかし前者は入熱制御に突き合せ角を取り入れ
た場合、その装置仕様による測定位置分解能が
0.4mm（外径91φ、48000本のフアイバーを使用）
となり、これまでの経験や操業上必要とされる測
定位置分解能は0.17mm以下であることから測定位
置分解能が満足されるものでなかつた。また後者
は、肉厚方向の温度をワークコイルと溶接突き合
せ点との間の任意の箇所で測温することを前提と
しているが、温度計で測温すべき電縫鋼管のエツ
ジ端面は、電縫鋼管の成形面の特徴から温度計が
全肉厚を視野内に収める事ができるような位置は
存在せず実機面では物理的に非常に困難であると
いう欠点を有する。 However, in the former case, when the butt angle is incorporated into heat input control, the measurement position resolution depends on the equipment specifications.
0.4mm (outer diameter 91φ, using 48000 fibers)
Therefore, based on past experience and the required operational resolution of 0.17 mm or less, the measurement position resolution was not satisfactory. The latter assumes that the temperature in the wall thickness direction is measured at any point between the work coil and the welding butt point, but the edge end face of the ERW steel pipe whose temperature should be measured with a thermometer is Due to the characteristics of the forming surface of ERW steel pipes, there is no position where the thermometer can fit the entire wall thickness within the field of view, and this has the disadvantage that it is physically extremely difficult to do so in actual equipment.
このような問題からエツジ部近傍の温度測定値
から突き合せ角や溶接突き合せ点の位置を測定し
てワークコイルの入熱制御に用いることは従来行
なわれていなかつた。 Because of these problems, it has not been conventionally possible to measure the abutment angle or the position of the weld abutment point from the temperature value near the edge and use it to control the heat input to the work coil.
（本発明の目的）
本発明は上記の如き、従来技術の欠点を解消
し、ワークコイルの入熱制御の精度向上のために
なされたもので、電縫鋼管の溶接工程において、
ワークコイルと該鋼管の溶接突き合せ点の間で所
定間隔をおいて少なくとも２ヶ所のオープンパイ
プ外周面温度を測定し、測定した温度分布のエツ
ジコーナー温度の信号を用いて突き合せ角を測定
し、さらに正確な溶接突き合せ点の測定を行う装
置を提供することを目的とするものである。(Objective of the present invention) The present invention has been made in order to eliminate the drawbacks of the prior art as described above and to improve the accuracy of heat input control of the work coil.
Measure the temperature of the outer circumferential surface of the open pipe at at least two locations at a predetermined interval between the welding butt points of the work coil and the steel pipe, and measure the butt angle using the signal of the edge corner temperature of the measured temperature distribution. , it is an object of the present invention to provide a device that more accurately measures a welding abutment point.
（発明の構成・作用）
上記目的を達成するための本発明装置の特徴と
するところは、電縫鋼管の溶接工程において加熱
装置と溶接突き合せ点との間でオープンパイプの
上方に少なくとも２個の走査型温度計を所定の間
隔をおいて配置し、該オープンコイルの進行方向
に対し直角方向に該温度計を走査させ、該温度計
の測定値を温度分布に交換する温度交換器と該変
換器出力の温度分布より走査位置のオープンパイ
プのエツジ部間隔を演算し、該演算値をもとに突
き合せ角及び溶接突き合せ点の位置を演算する信
号処理位置とからなることを特徴とする電縫鋼管
の突き合せ角及び溶接突き合せ点の測定装置にあ
る。(Structure and operation of the invention) The feature of the device of the present invention for achieving the above object is that in the welding process of electric resistance welded steel pipes, at least two A temperature exchanger in which scanning thermometers are arranged at predetermined intervals, the thermometers are scanned in a direction perpendicular to the traveling direction of the open coil, and the measured values of the thermometers are exchanged into a temperature distribution; It is characterized by comprising a signal processing position that calculates the edge interval of the open pipe at the scanning position from the temperature distribution of the converter output, and calculates the butt angle and the position of the welding butt point based on the calculated value. There is a device for measuring the butt angle and welding butt point of ERW steel pipes.
以下、本発明装置を図面に基き、詳細に説明す
る。 Hereinafter, the apparatus of the present invention will be explained in detail based on the drawings.
第１図、第２図は本発明の装置構成を略示する
模式図である。図中１，２は走査型温度計で設定
された所定間隔をおいて配置され、オープンパイ
プの外周面温度を測定する。３は温度変換器で温
度計１，２からの信号を温度信号処理を行う。４
はエツジ間隔距離、突き合せ角、溶接突き合せ点
の位置を演算する信号処理装置。５はワークコイ
ル７の電源を制御する電源制御装置、６はワーク
コイル７用電源、７はオープンパイプ８を高周波
加熱するワークコイル、１′，２′は走査型温度
１，２の走査ラインである。１０はオープンコイ
ルエツジ部の温度、エツジ間隔；突き合せ角、溶
接突き合せ角の位置測定装置である。 FIGS. 1 and 2 are schematic diagrams schematically showing the configuration of the apparatus of the present invention. In the figure, scanning thermometers 1 and 2 are placed at a predetermined interval and measure the temperature of the outer peripheral surface of the open pipe. A temperature converter 3 processes the signals from the thermometers 1 and 2. 4
is a signal processing device that calculates edge spacing distance, butt angle, and position of welding butt point. 5 is a power supply control device that controls the power supply of the work coil 7; 6 is a power supply for the work coil 7; 7 is a work coil that heats the open pipe 8 with high frequency; 1' and 2' are scanning lines of scanning type temperatures 1 and 2; be. Reference numeral 10 denotes a position measuring device for measuring the temperature of the open coil edge portion, the edge interval, the butt angle, and the welding butt angle.
走査型温度計１，２で、ワークコイル７とオー
プンパイプ８の溶接突き合せ点（以後Ｖ点とい
う）の任意の間隔で少なくとも２ヶ所のオープン
パイプ８の外周面を走査して輝度を測定し、温度
変換器３で温度信号に変換すると第３図に示すピ
ーク点を持つた温度パターンがそれぞれの測定位
置の温度に従つて得られる。これらの温度パター
ンのピーク点は、オープンパイプ８のエツジコー
ナー部である。 Using the scanning thermometers 1 and 2, scan the outer peripheral surface of the open pipe 8 in at least two locations at arbitrary intervals between the welding butt points (hereinafter referred to as V points) of the work coil 7 and the open pipe 8 to measure the brightness. When converted into a temperature signal by the temperature converter 3, a temperature pattern having peak points as shown in FIG. 3 is obtained according to the temperature at each measurement position. The peak points of these temperature patterns are at the edge corners of the open pipe 8.
これは高周波加熱の表皮効果によりエツジコー
ナー部の温度が最も高くなるためである。すなわ
ち、測定した温度パターンのピーク点間隔がオー
プンパイプ８の相対するエツジコーナー部の間隔
を示していることになる。第３図に示しているよ
うに走査型温度計１により得られる温度パターン
のピーク点間隔をl1、走査型温度計２により得ら
れる温度パターンのピーク点間隔をl2とすれば、
l1，l2はすなわち温度計の走査した位置のオープ
ンパイプ８のエツジ間隔であり、演算可能であ
る。また、走査型温度計１および２がオープンパ
イプ８を検知している間隔は走査型温度計の設置
時点で決まり、その間隔をＬとすると突き合せ角
（以後アペツクス角θという）は下記に示す(1)式
によつて計算可能である。 This is because the temperature at the edge corner becomes the highest due to the skin effect of high frequency heating. That is, the interval between the peak points of the measured temperature pattern indicates the interval between the opposing edge corners of the open pipe 8. As shown in FIG. 3, if the peak point interval of the temperature pattern obtained by the scanning thermometer 1 is l 1 and the peak point interval of the temperature pattern obtained by the scanning thermometer 2 is l 2 , then
In other words, l 1 and l 2 are the edge intervals of the open pipe 8 at the position scanned by the thermometer, and can be calculated. Furthermore, the interval at which the scanning thermometers 1 and 2 detect the open pipe 8 is determined when the scanning thermometers are installed, and if that interval is L, the butt angle (hereinafter referred to as apex angle θ) is shown below. It can be calculated using equation (1).
θ＝2tan-1（l1−l2／2L） ……(1)
但し
θ：アペツクス角
l1、l2：オープンパイルのエツジ間隔（走査型温
度計位置における）
Ｌ：走査型温度計１，２の走査間隔
すなわちエツジコーナー温度からエツジ間隔を
検知することによりアペツクス角を測定すること
ができる。 θ=2tan -1 (l 1 −l 2 /2L) ...(1) where θ: apex angle l 1 , l 2 : edge spacing of open pile (at scanning thermometer position) L: scanning thermometer 1 , 2. In other words, the apex angle can be measured by detecting the edge interval from the edge corner temperature.
この時、アペツクス角θを±0.2度の精度で測
定することが操業上必要であり、走査型温度計の
位置分解能を△ｌとすると
△ｌ（＝l1−l2）＝２−Ltan0.2／２＝0.17mm
（但し、この時走査型温度計の走査間隔Ｌを50mm
とする。）
であることが必要である。これを満足するために
走査型温度計の設置高さをオープンパイプ８のエ
ツジコーナー部から最低1500mm、最高2800mm（走
査型温度計の仕様による）とし、走査型温度計の
検出点を2048点、走査角７度のものを用いれば、
走査型温度計の走査位置分解能は
２×（1500〜2800）×tan7／２／2048＝0.09〜0.17mm
となり、これまでの経験や操業上必要とされる測
定位置分解能0.17mmを満足できるものである。 At this time, it is necessary for operation to measure the apex angle θ with an accuracy of ±0.2 degrees, and if the position resolution of the scanning thermometer is △l, then △l (= l 1 - l 2 ) = 2 - Ltan0. 2/2=0.17mm (However, at this time, the scanning interval L of the scanning thermometer is 50mm.
shall be. ). In order to satisfy this requirement, the installation height of the scanning thermometer is set to a minimum of 1500 mm and a maximum of 2800 mm from the edge corner of the open pipe 8 (according to the specifications of the scanning thermometer), and the scanning thermometer has 2048 detection points. If you use one with a scanning angle of 7 degrees,
The scanning position resolution of the scanning thermometer is 2 x (1500 to 2800) x tan7/2/2048 = 0.09 to 0.17 mm, which satisfies the measurement position resolution of 0.17 mm required based on past experience and operation. be.
次にＶ点の測定は(1)式によりアペツクス角θが
わかつており、また走査型温度計１，２によるオ
ープンパイプ８のエツジコーナー部の検知位置は
固定されているものであるから、温度パターンに
よりl1、l2がわかるのでＶ点の測定は下記に示す
(2)式によつて表わされる。 Next, when measuring point V, the apex angle θ is varied according to equation (1), and the detection position of the edge corner of the open pipe 8 by the scanning thermometers 1 and 2 is fixed, so the temperature Since l 1 and l 2 can be determined from the pattern, the measurement of point V is shown below.
It is expressed by equation (2).
Ａ＝l1／２（またはl2／２）／tanθ／２ ……(2)
但し
Ａ：エツジコーナー部間隔中心からＶ点までの距
離
θ：アペツクス角
l1、l2：走査型温度計の走査装置におけるオープ
ンパイプのエツジ間隔
以上に示す計算を信号処理装置４で行うことに
より、電縫鋼管の溶接工程におけるワークコイル
７とＶ点の間で少なくとも２ヶ所のオープンコイ
ル温度を検知してその検知温度からエツジコーナ
ー間隔l1、l2の測定を行い、上記間隔信号を用い
てアペツクス角θ、Ｖ点の位置測定が可能とな
る。 A = l 1 /2 (or l 2 /2) / tan θ / 2 ... (2) However, A: Distance θ from the edge corner spacing center to point V: Apex angle l 1 , l 2 : Scanning thermometer Edge spacing of open pipe in scanning device By performing the calculations shown above with the signal processing device 4, the open coil temperatures at at least two locations between the work coil 7 and point V in the welding process of ERW steel pipes can be detected. The edge corner distances l 1 and l 2 are measured from the detected temperature, and the apex angle θ and the position of point V can be measured using the distance signals.
さらに電縫鋼管の溶接工程におけるワークコイ
ル用電源６の制御には、溶接温度Ｔ、電縫鋼管の
肉厚ｔ、および溶接速度Ｓが制御因子として取り
入れられ、一方電縫鋼管の溶接工程の制御には、
制御因子としてアペツクス角θ、Ｖ点位置Ｖ、電
縫鋼管の材質Ｑ、また鋼管外径Ｒ等が必要である
ことが発明者等の検討、研究によりわかり、また
操業上不可欠である。 Furthermore, the welding temperature T, the wall thickness t of the ERW steel pipe, and the welding speed S are incorporated as control factors in the control of the work coil power source 6 in the welding process of the ERW steel pipe, while the control of the welding process of the ERW steel pipe is for,
The inventors' studies and research have revealed that the apex angle θ, the V point position V, the material Q of the electric resistance welded steel pipe, and the outside diameter R of the steel pipe are necessary as control factors, and these are essential for operation.
アペクツク角θは、操業上測定精度±0.2度が
必要であり、その測定位置分解能は0.17mm以下必
要であることが前記したように発明者等の検討、
研究の結果わかつている。そこで信号処理装置４
により前記(1)式及び(2)式に示すアペクツス角θ及
びＶ点位置の演算を行い、その値はワークコイル
７の電源制御装置５へ出力され、ワークコイル７
の電源６の制御因子として新らたに用いられるも
のである。 As mentioned above, the inventors' study revealed that the measurement accuracy of the apex angle θ is required to be ±0.2 degrees for operational purposes, and the measurement position resolution is required to be 0.17 mm or less.
The results of the research are known. Therefore, the signal processing device 4
The apectus angle θ and the V point position shown in equations (1) and (2) above are calculated, and the values are output to the power supply control device 5 of the work coil 7.
This will be newly used as a control factor for the power source 6 of .
この２つを新にワークコイル７の電源制御装置
５の制御因子として用いることにより、例えば今
までの制御精度が±2.6％であつたものが±0.8％
と向上するものである。またＶ点位置の測定によ
つてＶ点位置の変動を検知することが可能とな
り、溶接工程でのスクイズロールのスクイズ量の
測定に用いることも可能となる。 By newly using these two factors as control factors for the power supply control device 5 of the work coil 7, the control accuracy that was previously ±2.6% can be reduced to ±0.8%.
This will improve the performance. Furthermore, by measuring the V point position, it is possible to detect fluctuations in the V point position, and it can also be used to measure the squeeze amount of the squeeze roll in the welding process.
（発明の効果）
本発明装置の測定値を電縫溶接鋼管の入熱制御
に導入することにより、ワークコイル用電源を制
御する制御精度が向上し、今まで製造困難であつ
た電縫鋼管の厚肉化、高カーボン化、高合金鋼化
が可能となり、また溶接工程の高速化を可能とす
る等効果大なるものがある。(Effects of the invention) By introducing the measured values of the device of the present invention into the heat input control of ERW welded steel pipes, the control accuracy for controlling the power supply for the work coil is improved, and the production of ERW steel pipes, which has been difficult to manufacture up until now, has been improved. It has great effects, such as making it possible to use thicker walls, higher carbon content, and higher alloy steel, and also making it possible to speed up the welding process.
第１図は本発明の装置構成を略示する模式図、
第２図は第１図の−′斜視図、第３図は走査
型温度計の走査位置の温度パターンを示す図であ
る。
１，２：走査型温度計、３：温度計変換器、
４：信号処理装置、５：ワークコイル用電源制御
装置、６：ワークコイル用電源、７：ワークコイ
ル、８：オープンパイプ、１０：突き合せエツジ
コーナーの温度と突き合せ角測定装置。
FIG. 1 is a schematic diagram schematically showing the device configuration of the present invention,
FIG. 2 is a -' perspective view of FIG. 1, and FIG. 3 is a diagram showing the temperature pattern at the scanning position of the scanning thermometer. 1, 2: Scanning thermometer, 3: Thermometer converter,
4: Signal processing device, 5: Work coil power control device, 6: Work coil power source, 7: Work coil, 8: Open pipe, 10: Butt edge corner temperature and butt angle measuring device.
Claims (1)
突き合せ点との間でオープンパイプの上方に少な
くとも２個の走査型温度計を所定の間隔をおいて
配置し、該オープンコイルの進行方向に対し直角
方向に該温度計を走査させ、該温度計の測定値を
温度分布に変換する温度変換器と該変換器出力の
温度分布より、走査位置のオープンパイプのエツ
ジ部間隔を演算し、該演算値をもとに突き合せ角
及び溶接突き合せ点の位置を演算する信号処理装
置とからなることを特徴とする電縫鋼管の突き合
せ角及び溶接突き合せ点の測定装置。1. In the welding process of electric resistance welded steel pipes, at least two scanning thermometers are placed above the open pipe at a predetermined interval between the heating device and the welding abutment point, and The temperature converter converts the measured value of the thermometer into a temperature distribution by scanning the thermometer in the right angle direction, and the temperature distribution of the output of the converter calculates the edge interval of the open pipe at the scanning position, and calculates the distance between the edges of the open pipe at the scanning position. 1. A measuring device for measuring the butt angle and welding butt point of electric resistance welded steel pipes, comprising a signal processing device that calculates the butt angle and the position of the welding butt point based on the values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1499985A JPS61173109A (en) | 1985-01-29 | 1985-01-29 | Measuring instrument for butt angle and butt point for welding of electric welded steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1499985A JPS61173109A (en) | 1985-01-29 | 1985-01-29 | Measuring instrument for butt angle and butt point for welding of electric welded steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61173109A JPS61173109A (en) | 1986-08-04 |
| JPH0360372B2 true JPH0360372B2 (en) | 1991-09-13 |
Family
ID=11876616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1499985A Granted JPS61173109A (en) | 1985-01-29 | 1985-01-29 | Measuring instrument for butt angle and butt point for welding of electric welded steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61173109A (en) |
-
1985
- 1985-01-29 JP JP1499985A patent/JPS61173109A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61173109A (en) | 1986-08-04 |
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