JPS60185102A - Curvature measuring device for steel pipe - Google Patents
Curvature measuring device for steel pipeInfo
- Publication number
- JPS60185102A JPS60185102A JP4041784A JP4041784A JPS60185102A JP S60185102 A JPS60185102 A JP S60185102A JP 4041784 A JP4041784 A JP 4041784A JP 4041784 A JP4041784 A JP 4041784A JP S60185102 A JPS60185102 A JP S60185102A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- distance
- steel plate
- arm
- distance meter
- 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
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
【発明の詳細な説明】 この発明は、鋼管の曲り測定装置に関するものである。[Detailed description of the invention] The present invention relates to a steel pipe bend measuring device.
近年、油井管等に用いられる継目無し鋼管を、素材とし
てのビレットの選択から製品の検査に至るまでの全ての
工程をオンラインで自動的に行う鋼管製造工場が建設さ
れ注目を集めている。In recent years, steel pipe manufacturing plants have been built that automatically perform online processes for seamless steel pipes used in oil country tubular goods, from selecting billets as material to product inspection, and have been attracting attention.
上記工程の１つに製造した鋼管の曲りを測定する工程が
ある。One of the above steps includes a step of measuring the bending of the manufactured steel pipe.
従来、鋼管の曲りを測定する方法として、第１図に示さ
れるように、被測定鋼管１をターニングローラ２上に載
置し、渦流式距離計３を鋼管１と対向して設置し、ター
ニングローラ２を駆動させて鋼管ｌを回転させ、このと
きの渦流式距離計３と鋼管１との間の距離Ｘを前記距離
側３によって連続的に測定し、この測定された前記距離
Ｘから鋼管１の曲りを測定する方法があった。Conventionally, as shown in FIG. 1, as a method for measuring the bending of a steel pipe, a steel pipe to be measured 1 is placed on a turning roller 2, an eddy current distance meter 3 is installed opposite to the steel pipe 1, and the turning is performed. The roller 2 is driven to rotate the steel pipe 1, the distance X between the eddy current distance meter 3 and the steel pipe 1 is continuously measured by the distance side 3, and the steel pipe is determined from the measured distance X. There was a method to measure the bending of 1.
しかし、上述した従来の測定装置によれば鋼管１の外径
の変化によって渦流式距離計３からの出力値と前記距離
Ｘとの関係が第２図に示されるように変化する。即ち、
管径が小さくなるほど鋼管ｌに生じる渦電流の粱が少な
くなるので、距離Ｘに対する前記出力値が小さくなる。However, according to the conventional measuring device described above, the relationship between the output value from the eddy current distance meter 3 and the distance X changes as shown in FIG. 2 due to a change in the outer diameter of the steel pipe 1. That is,
As the pipe diameter becomes smaller, the amount of eddy current generated in the steel pipe l becomes smaller, so the output value with respect to the distance X becomes smaller.
しかも、前記出力値と前記距離Ｘとの関係は非直線的な
関係である。Moreover, the relationship between the output value and the distance X is a non-linear relationship.
このために、各種外径の管の曲りを測定するには、各外
径毎に複雑な補正を行う必要があり、設置相が高価とな
る。For this reason, in order to measure the bending of pipes of various outside diameters, it is necessary to perform complicated corrections for each outside diameter, making the installation expensive.
この発明は、上述のような問題点を解決するだめになさ
れたものであって、支軸によって回動自在に取り付けら
れたアームと、前記アームの１端に回転自在に取り伺け
られたタッチロールと、前記アームの他端に固定された
鋼板と、前記タッチロールを被ｆｉｌｌ定鋼管の外周面
に常時接触させるだめの接触力付与手段と、前記鋼板と
対向して設置された渦流式距離計および演算装置とから
構成されることに特徴を有する。This invention was made to solve the above-mentioned problems, and includes an arm rotatably attached to a support shaft, and a touch rotatably attached to one end of the arm. a roll, a steel plate fixed to the other end of the arm, a contact force applying means for constantly bringing the touch roll into contact with the outer peripheral surface of the steel pipe to be filled, and a vortex-type distance installed opposite to the steel plate. It is characterized by being composed of a computer and an arithmetic unit.
この発明の１実施態様を図面を参照しながら説明する。One embodiment of this invention will be described with reference to the drawings.
第３図は、この発明の１実施態様の装置によって＠管の
曲シを測定している状態を示す説明図である。FIG. 3 is an explanatory diagram showing a state in which the bending of a pipe is being measured by an apparatus according to one embodiment of the present invention.
゛第３図に示されるように、この発明の曲り測定装置Ａ
は、鋼管１の外周面に接触して自在に回転するタッチロ
ール４と、一端にタッチロール４を取り付けだ、支軸６
によって回動自在に取り付けられたアーム５と、アーム
５の他端に水平に固定された鋼板７と、鋼板７と対向し
て設置された渦流式距離計３と、タッチロール４を鋼管
１の外周面に常時接触させるための接触力付与手段とし
てのスプリング８とから構成される。スプリング８の作
用によって、タッチロール４は、鋼管ｌの外周面に常時
接触し、鋼管１の回転に伴って回転する。前記手段はス
プリングの代りに重り等であっても良い。゛As shown in Fig. 3, the bending measuring device A of the present invention
The touch roll 4 is in contact with the outer peripheral surface of the steel pipe 1 and rotates freely, and the support shaft 6 is attached to one end of the touch roll 4.
A steel plate 7 is fixed horizontally to the other end of the arm 5, an eddy current distance meter 3 is installed opposite the steel plate 7, and a touch roll 4 is attached to the steel pipe 1. It is composed of a spring 8 as a contact force applying means for constantly contacting the outer circumferential surface. Due to the action of the spring 8, the touch roll 4 is constantly in contact with the outer circumferential surface of the steel pipe 1, and rotates as the steel pipe 1 rotates. The means may be a weight or the like instead of a spring.
上述したように構成される、この発明の曲り測定装置Ａ
によって、鋼管１の曲りを測定するには、鋼管１をター
ニングローラ２上に載置した後、タッチローラ４が鋼管
１の所定位置の外周面に接触するように曲り測定装置Ａ
を設置し、ターニングローラ２を駆動して鋼管１を回転
させる。タッチロール４はスプリング８の引っ張り力に
よって鋼管１の回転に追従して回転する。これによって
鋼板７は支＠６を中心として鋼管１の曲りに応じて上下
方向に移動する。渦流式距離計３は鋼板７が上下方向に
移動したときの、鋼板７と渦流式距離計３との間の距離
Ｘを連続的に測定する。Bending measuring device A of the present invention configured as described above
To measure the bend of the steel pipe 1, the steel pipe 1 is placed on the turning roller 2, and then the bend measuring device A is moved so that the touch roller 4 contacts the outer peripheral surface of the steel pipe 1 at a predetermined position.
is installed, and the turning roller 2 is driven to rotate the steel pipe 1. The touch roll 4 rotates following the rotation of the steel pipe 1 due to the tensile force of the spring 8. As a result, the steel plate 7 moves vertically about the support @6 in accordance with the bending of the steel pipe 1. The eddy current distance meter 3 continuously measures the distance X between the steel plate 7 and the eddy current distance meter 3 when the steel plate 7 moves in the vertical direction.
前記距離ｘと渦流式距離計３からの出力値との関係は、
鋼管１がターニングローラ２上に載置されて回転してい
るために、鋼管１の外径によって変化する。この関係を
第４図に示す。第４図において、鋼管ｌの外径の変化に
よる距離Ｘの変動幅は鋼管１の曲りの大きさによって変
化する。演算装置９は渦流式距離計３からの出力値を取
り込み、鋼管１が少なくても１周する間における距離Ｘ
の最大値ｘｆｆｌａｘ、ｌ！：最小値ｊｃ、、。との差
、ＪｚＢｙ −”ｍｉｎと、１、（タッチロール４と支
軸６との間の距ｎ）および１□（鋼板７と支軸６との間
の距１報）とによるテコ比およびターニングローラ２（
鋼管１の支点）とタッチロール４，１−の間の距飾り、
’−７３＞ら単イ〃長言当りの鋼管１の曲りＸ （ｙｕ
ｎ／ ｍ ’）を次式に従って演算する。通常、ｘ＜１
１であるので距離ｘと出力値とは直線関係が成立する。The relationship between the distance x and the output value from the eddy current distance meter 3 is as follows:
Since the steel pipe 1 is placed on the turning roller 2 and rotated, it changes depending on the outer diameter of the steel pipe 1. This relationship is shown in FIG. In FIG. 4, the range of variation in the distance X due to a change in the outer diameter of the steel pipe 1 changes depending on the degree of bending of the steel pipe 1. The calculation device 9 takes in the output value from the eddy current distance meter 3 and calculates the distance X while the steel pipe 1 goes around at least once.
The maximum value of xfflax, l! : Minimum value jc, . , the difference between JzBy -"min and the lever ratio of 1, (distance n between touch roll 4 and support shaft 6) and 1□ (distance 1 report between steel plate 7 and support shaft 6) and Turning roller 2 (
A distance decoration between the fulcrum of the steel pipe 1) and the touch roll 4, 1-,
'-73> bending of steel pipe 1 per long word (yu
n/m') is calculated according to the following formula. Usually x<1
1, a linear relationship is established between the distance x and the output value.
従って、複雑な補正を行うことなく鋼管１０曲りを高精
度で演算することができる。Therefore, the bends of the steel pipe 10 can be calculated with high accuracy without performing complicated corrections.
１゜
前記距離もと１□ との関係が鳥〉１２ となるように
すれば、鋼管１の大きな曲り量を、鋼板７の小さな移動
量に変換することができるので、渦流式距離計３として
測定レンジが狭い比較的安価なものを使用することがで
きる。1゜If the relationship with the distance source 1□ is set as 〉12, the large amount of bending of the steel pipe 1 can be converted into a small amount of movement of the steel plate 7, so it can be used as an eddy current distance meter 3. A relatively inexpensive device with a narrow measurement range can be used.
以上説明したように、この発明によれば、鋼管の曲９を
高精度、且つ、容易に測定することができ、しかも、製
造コストも安価で済む等種々の有用な効果がもたらされ
る。As explained above, according to the present invention, the curve 9 of a steel pipe can be easily measured with high precision, and the manufacturing cost can be reduced, and various other useful effects are brought about.
第１図は、従来の曲シ測定方法を示す説明図、第２図は
、従来方法によって鋼管の曲りを測定した場合の出力値
と距離Ｘとの関係を示すグラフ、第３図は、この発明の
１実施態様によって鋼管の曲りを測定している状態を示
す説明図、第４図は、この発明の装置によって鋼管の曲
りを測定した場合の出力値と距離Ｘとの関係を示すグラ
フである。
図面において、
１・・・鋼管 ２・・・ターニングローラ３・・・渦流
式距離計 ４・・・タッチロール５・・アーム ６・・
・支軸
７・・・鋼板 ８・・スプリング
９・・演算装置
出願人 日本鋼管株式会社
代理人 潮 谷 奈津夫（他２名）
富１図
第２図
距離χFigure 1 is an explanatory diagram showing the conventional bending measurement method, Figure 2 is a graph showing the relationship between the output value and distance X when measuring the bending of a steel pipe by the conventional method, and Figure 3 is FIG. 4 is an explanatory diagram showing a state in which the bending of a steel pipe is measured by one embodiment of the invention, and is a graph showing the relationship between the output value and the distance X when the bending of the steel pipe is measured by the device of the present invention. be. In the drawings, 1... Steel pipe 2... Turning roller 3... Eddy current distance meter 4... Touch roll 5... Arm 6...
・Spindle 7...Steel plate 8...Spring 9...Arithmetic device Applicant Nippon Kokan Co., Ltd. Agent Natsuo Shioya (and 2 others) Figure 1 Figure 2 Distance χ
Claims (2)
と、前記アームの１端に回転自在に取り付けられたタッ
チロールと、前１己アームの他端に固定された鋼板と、
前記タッチロールを被測定鋼管の外周部に常時接触させ
るだめの接触力付与手段と、前記鋼板と対向して設置さ
れた渦流式距離計およびＫ 株装置とから構成されるこ
とを特徴とする、＠Ｐ綺の曲り祁ｊ定装置。(1) an arm rotatably attached to a support shaft, a touch roll rotatably attached to one end of the arm, and a steel plate fixed to the other end of the front arm;
It is characterized by comprising a contact force applying means for constantly bringing the touch roll into contact with the outer circumference of the steel pipe to be measured, and an eddy current distance meter and a K stock device installed opposite to the steel plate, @Pki's bending device.
の距ｔ２ｆｌｔ ’＋と、前記鋼板と前記支軸との間の
距Ｆｉｉｋ Ｊ、ｌとが’Ｉ＞ ’２ を満足する位置
に取り何けられていることを特徴とする、前記特許請求
の範囲第（１）項記載の装置〜−０(2) The spindle has a distance t2flt'+ between the touch roll and the spindle, and a distance Fiik J,l between the steel plate and the spindle that satisfy 'I>'2. The device according to claim 1, characterized in that the device is set aside in a position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4041784A JPS60185102A (en) | 1984-03-05 | 1984-03-05 | Curvature measuring device for steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4041784A JPS60185102A (en) | 1984-03-05 | 1984-03-05 | Curvature measuring device for steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60185102A true JPS60185102A (en) | 1985-09-20 |
Family
ID=12580081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4041784A Pending JPS60185102A (en) | 1984-03-05 | 1984-03-05 | Curvature measuring device for steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60185102A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817908A (en) * | 2013-12-09 | 2014-05-28 | 联塑科技发展(贵阳)有限公司 | On-line monitoring equipment and method of PVC (polyvinyl chloride) pipes with unqualified bending |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850407A (en) * | 1981-09-21 | 1983-03-24 | Nippon Kokan Kk <Nkk> | Device for measuring bending of tube body end part |
-
1984
- 1984-03-05 JP JP4041784A patent/JPS60185102A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850407A (en) * | 1981-09-21 | 1983-03-24 | Nippon Kokan Kk <Nkk> | Device for measuring bending of tube body end part |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817908A (en) * | 2013-12-09 | 2014-05-28 | 联塑科技发展(贵阳)有限公司 | On-line monitoring equipment and method of PVC (polyvinyl chloride) pipes with unqualified bending |
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