JPH08141643A - Large tube shape correcting method and device for measuring dimension and shape of large tube - Google Patents
Large tube shape correcting method and device for measuring dimension and shape of large tubeInfo
- Publication number
- JPH08141643A JPH08141643A JP27892794A JP27892794A JPH08141643A JP H08141643 A JPH08141643 A JP H08141643A JP 27892794 A JP27892794 A JP 27892794A JP 27892794 A JP27892794 A JP 27892794A JP H08141643 A JPH08141643 A JP H08141643A
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- Prior art keywords
- pipe
- diameter
- bending
- bend
- measuring means
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は矯正後の大径管の曲りを
予測する技術及び大径管の管端部の真円度と長手方向の
曲りとを同時に計測する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for predicting the bend of a large diameter pipe after straightening and an apparatus for simultaneously measuring the roundness and the bending in the longitudinal direction of the end portion of the large diameter pipe.
【０００２】[0002]
【従来の技術】管に限らず鋼材は決められた寸法精度内
でなければ不合格品となり、実用に供さない。そこで、
鋼材製造者はＪＩＳ又は予め需要者と取決めた合格基準
を、製造鋼材がクリアしているか否かを検査し、必要に
応じて修正を加えて合格品を出荷するようにしている。
そこで、寸法・形状を正確に迅速に測定する装置及び技
術が必要となる。2. Description of the Related Art Not only pipes but also steel materials are rejected unless they are within a predetermined dimensional accuracy and are not put to practical use. Therefore,
The steel material manufacturer inspects whether or not the manufactured steel material has passed the JIS or the acceptance criteria preliminarily agreed with the customer, and corrects if necessary to ship the acceptable product.
Therefore, there is a need for a device and technology for accurately and quickly measuring the size and shape.
【０００３】大径管（大径の鋼管）では、管端部の真円
度と長手方向の曲りとが検査の対象となり、出願人は先
に特開昭６３−２４６６０７号公報「管棒材の曲り測
定方法及びその装置」や実開平５−２３０１５号公報
「管端部の自動寸法測定装置」を提案した。In a large-diameter pipe (large-diameter steel pipe), the roundness of the end of the pipe and the bending in the longitudinal direction are the objects of inspection, and the applicant has previously disclosed in Japanese Unexamined Patent Publication No. 63-246607 "Tube Rod Material". Bending measurement method and apparatus therefor "and Japanese Utility Model Laid-Open No. 5-201515" Automatic measurement device for pipe end ".
【０００４】前記は、管棒状体を軸の周りに回転さ
せ、軸方向各部における軸直角方向の変位量を計測して
「曲り」を測定する。前記は、鋼管の内周面に変位計
のタッチローラを接触させ、このタッチロールが鋼管内
周面を一周する間に変位量を計測し、この計測値から
「真円度」を求める。In the above, the "bending" is measured by rotating the tube-shaped body around the axis and measuring the amount of displacement in each axial direction in the direction perpendicular to the axis. In the above, the touch roller of the displacement meter is brought into contact with the inner peripheral surface of the steel pipe, the displacement amount is measured while the touch roll makes one round of the inner peripheral surface of the steel pipe, and the "roundness" is obtained from the measured value.
【０００５】図８（ａ），（ｂ）は真円度及び曲りの説
明図であり、（ａ）に示す通りに真円度は管端部で測定
して得た測定値のうちの最大径Ｄmaxと最小径Ｄminの差
を公称径Ｄnで割り１００倍した値であり、（ｂ）に示
す通りに曲りは当該管の両端を結んだ水糸と管外面との
間の隙間のうちの最大すきま（Ｍmax）をいう。FIGS. 8 (a) and 8 (b) are explanatory diagrams of roundness and bending. As shown in FIG. 8 (a), the roundness is the maximum of the measured values obtained by measuring at the pipe end. It is the value obtained by dividing the difference between the diameter Dmax and the minimum diameter Dmin by the nominal diameter Dn and multiplying it by 100, and as shown in (b), the bend is one of the gaps between the water thread connecting the both ends of the pipe and the outer surface of the pipe. Maximum clearance (Mmax).
【０００６】上記真円度が不合格である場合は、一般に
拡管機（管内面を径外方へ強く押して拡径する機械）に
て最小径Ｄmin部分を拡径することで補正する。また、
曲り不良品についても拡管機の押圧ヘッドを管内の当該
部分へ挿入し、押圧ヘッドで内曲り部分を外方へ押出す
等して曲りを強制する手法が採用されている。When the above-mentioned roundness is unacceptable, generally, the minimum diameter Dmin portion is expanded by a pipe expanding machine (a machine for expanding the diameter by strongly pushing the inner surface of the pipe outward in the radial direction). Also,
Also for defective bending products, a method is adopted in which the pressing head of the tube expander is inserted into the relevant portion of the pipe and the inner bending portion is pushed outward by the pressing head to force the bending.
【０００７】[0007]
【発明が解決しようとする課題】図９（ａ）〜（ｄ）は
大径管の変形態様を示す図であり、（ａ）は中央に管の
正面、左に左側面、右に右側面を示す。（ｂ），
（ｃ），（ｄ）も同様である。（ａ）は管端部が卵形を
呈し、正面図に示す通り中央上部が窪んだものである。
（ｂ）は管端部が長円形を呈し、正面図に示す通り中央
上部及び下部が窪んだものである。（ｃ）は左管端部が
ほぼ正円で右管端部が長円形を呈し、正面図に示す通り
右端部のみ真円度が悪いものである。（ｄ）は管端部が
ほぼ正円を呈し、正面図に示す通り全体に曲っているも
のである。9 (a) to 9 (d) are views showing a modification of a large-diameter pipe. FIG. 9 (a) is a front view of the pipe in the center, a left side face on the left side, and a right side face on the right side. Indicates. (B),
The same applies to (c) and (d). In (a), the tube end has an oval shape and the central upper part is recessed as shown in the front view.
In (b), the tube end has an oval shape, and the central upper part and the lower part are depressed as shown in the front view. In (c), the left tube end has a nearly perfect circle and the right tube end has an oval shape, and as shown in the front view, only the right end has poor roundness. In (d), the pipe end has a substantially perfect circle, and is bent as a whole as shown in the front view.
【０００８】このように大径管の変形の態様は様々であ
る。そして、（ａ）において、最初に測定した曲りがＭ
１であったものを両管端部を拡管機で想像線Ａ，Ｂで示
すように管端部のみを矯正すると、曲りはＭ２（Ｍ２＜
Ｍ１）となる。即ち、真円度と曲りとの間に密接な関係
のあることが分かる。As described above, there are various modes of deformation of the large diameter pipe. Then, in (a), the first measured bend is M
If both ends of the pipe were corrected with a pipe expander as shown by imaginary lines A and B, the bend was M2 (M2 <M2 <
M1). That is, it can be seen that there is a close relationship between roundness and bending.
【０００９】しかし、従来は上記の技術で「曲り」を
計測して曲りを矯正し、また、上記の技術で「真円
度」を計測して真円度を矯正するため、計測及び矯正を
繰返さなければならない。例えば真円度を矯正したため
に曲りが悪くなる恐れもあり、作業能率は極めてよくな
い。However, conventionally, the "bending" is measured by the above technique to correct the bending, and the "roundness" is measured by the above technique to correct the roundness. Must be repeated. For example, since the roundness is corrected, the bending may be deteriorated, and the work efficiency is extremely poor.
【００１０】[0010]
【課題を解決するための手段及び作用】そこで、本発明
者等は大径管の寸法・形状計測とそれに引続く矯正工程
の能率を大幅に向上させるべく鋭意研究を続け、その過
程で大径管は、両管端部を除く管中央部分の真円度が良
好であり且つ公称径とほぼ同一であることを見出した。
管端部を公称径に近似した正円に矯正することを前提
に、「予測曲り」を演算し、この「予測曲り」が許容曲
り以内であれば曲りの矯正は省略し得ることを見出し
た。[Means and Actions for Solving the Problems] Therefore, the inventors of the present invention continued to earnestly study in order to greatly improve the efficiency of the measurement of the size and shape of a large diameter pipe and the subsequent straightening process, and in the process, the large diameter It has been found that the tube has good roundness in the central part of the tube excluding both ends and is almost the same as the nominal diameter.
"Predicted bend" is calculated on the assumption that the pipe end is corrected to a perfect circle close to the nominal diameter, and it has been found that correction of the bend can be omitted if this "predicted bend" is within the allowable bend. .
【００１１】具体的には、公称径Ｄnである大径管の左
右管端部の管径測定値をＤ1、Ｄ2とし、管の曲り測定値
をＭとした場合に、（Ｄ1−Ｄn）と（Ｄ2−Ｄn）との平
均値を曲りＭから差し引いたものを予想曲りＭexpと
し、この予想曲りＭexpに基づいて形状矯正を実施す
る。Specifically, when the pipe diameter measurement values of the left and right pipe ends of the large-diameter pipe having the nominal diameter Dn are D1 and D2, and the bend measurement value of the pipe is M, (D1-Dn) A value obtained by subtracting the average value of (D2-Dn) from the curve M is set as a predicted curve Mexp, and the shape is corrected based on the predicted curve Mexp.
【００１２】その方法を実施するに好適な装置は、大径
管の左管端部の径を測定する第１管径測定手段と、大径
管の右管端部の径を測定する第２管径測定手段と、大径
管の長手方向の曲りを計測する曲り測定手段と、前記第
１・２管径測定手段からの真円度情報及び曲り測定手段
からの曲り情報を得て矯正後の曲りを予測する演算部と
からなる大径管の寸法・形状測定装置である。An apparatus suitable for carrying out the method is a first pipe diameter measuring means for measuring the diameter of the left pipe end of the large diameter pipe and a second pipe diameter measuring means for measuring the diameter of the right pipe end of the large diameter pipe. After correcting the pipe diameter measuring means, the bend measuring means for measuring the bending in the longitudinal direction of the large diameter pipe, the roundness information from the first and second pipe diameter measuring means and the bend information from the bend measuring means Is a device for measuring the size and shape of a large-diameter pipe, which comprises a calculation unit for predicting the bending of the pipe.
【００１３】[0013]
【実施例】本発明の実施例を添付図に基づいて以下に説
明する。なお、図面は符号の向きに見るものとする。図
１は本発明に係る大径管の寸法・形状測定装置図であ
り、大径管の寸法・形状測定装置１は検査対象材である
大径管２を水平に保持し且つ一定の回転数で回転する４
個のターンニングロール３…（…は複数個を示す。以下
同様。）と、大径管２の左管端部２Ｌの径を測定する第
１管径測定手段１０と、大径管２の右管端部２Ｒの径を
測定する第２管径測定手段２０と、大径管２の長手方向
の曲りを計測する曲り測定手段３０と、前記第１・２管
径測定手段１０，２０からの真円度情報及び曲り測定手
段３０からの曲り情報を得て矯正後の曲りを予測する演
算部４０とからなる。Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a diagram of a size / shape measuring device for a large diameter pipe according to the present invention. Rotate in 4
Each of the turning rolls 3 (... indicates a plurality, the same applies hereinafter), the first pipe diameter measuring means 10 for measuring the diameter of the left pipe end portion 2L of the large diameter pipe 2, and the large diameter pipe 2 From the second pipe diameter measuring means 20 for measuring the diameter of the right pipe end portion 2R, the bend measuring means 30 for measuring the bending of the large diameter pipe 2 in the longitudinal direction, and the first and second pipe diameter measuring means 10, 20. The roundness information and the bending information from the bending measuring means 30 are used to predict the corrected bending.
【００１４】第１管径測定手段１０は、基盤１１と、大
径管２の軸方向に移動可能に設けられたスライダ１２
と、スライダ１２の上部に取付けられたシリンダ型変位
計１３と、この変位計１３のロッドの先端に回転自在に
取付けられたタッチロール１４とからなる。タッチロー
ル１４が転動しつつ管の内面を相対移動すると、凹凸に
応じてタッチロール１４は移動する。この移動量を変位
計１３で計測する。大径管２のみを回転する方式、大径
管２を固定して変位計１３を移動（回転）させる方式の
いずれであってもよい。The first pipe diameter measuring means 10 comprises a base 11 and a slider 12 movably provided in the axial direction of the large diameter pipe 2.
And a cylinder type displacement gauge 13 attached to the upper part of the slider 12, and a touch roll 14 rotatably attached to the tip of the rod of the displacement gauge 13. When the touch roll 14 relatively moves on the inner surface of the tube while rolling, the touch roll 14 moves according to the unevenness. The displacement amount is measured by the displacement meter 13. Either the method of rotating only the large diameter tube 2 or the method of moving (rotating) the displacement gauge 13 while fixing the large diameter tube 2 may be used.
【００１５】第２管径測定手段２０は、第１管径測定手
段１０と同様に、基盤２１と、大径管２の軸方向に移動
可能に設けられたスライダ２２と、スライダ２２の上部
に取付けられたシリンダ型変位計２３と、この変位計２
３のロッドの先端に回転自在に取付けられたタッチロー
ル２４とからなる。The second pipe diameter measuring means 20, like the first pipe diameter measuring means 10, has a base 21, a slider 22 movably provided in the axial direction of the large diameter pipe 2, and an upper portion of the slider 22. The mounted cylinder type displacement gauge 23 and this displacement gauge 2
3 and a touch roll 24 rotatably attached to the tip of the rod.
【００１６】曲り測定手段３０は、前記スライダ１２に
載置された曲り測定用第１変位計３１と、大径管２の中
央の変位を計測する曲り測定用第２変位計３２と、スラ
イダ２２に載置された曲り測定用第３変位計３３とから
なる。これら変位計３１，３２，３３もロッドの先端に
タッチロール３４…を備えるている。The bend measuring means 30 includes a bend measuring first displacement gauge 31 mounted on the slider 12, a bend measuring second displacement gauge 32 for measuring the center displacement of the large diameter pipe 2, and a slider 22. The third displacement gauge 33 for bending measurement mounted on the. These displacement gauges 31, 32, 33 are also equipped with touch rolls 34 ... At the tip of the rod.
【００１７】演算部４０は、曲り測定用変位計３１，３
２，３３からの信号（ｘ，ｙ，ｚ）をアンプ３５ａ，３
５ｂ，３５ｃを介して入力し、「曲りＭ」を演算する曲
り演算部４１と、この曲り演算部４１の情報と前記第１
・第２管径測定手段１０，２０の真円度情報（Ｄ1，Ｄ
2）とから「予想曲りＭexp」を演算する予想曲り演算部
４２と、必要に応じてデータを表示・印字・記録する表
示部４３とからなる。図中、１５，２５はアンプであ
る。The calculation unit 40 is a displacement measuring displacement sensor 31, 3 for bending measurement.
The signals (x, y, z) from the amplifiers 2, 33 are supplied to the amplifiers 35a, 3
5b and 35c, a bending calculation unit 41 for calculating the "bend M", information of the bending calculation unit 41 and the first
・ Roundness information (D1, D) of the second pipe diameter measuring means 10, 20
2) From the above, it comprises an expected bend calculating section 42 for calculating the “expected bend Mexp” and a display section 43 for displaying / printing / recording data as required. In the figure, 15 and 25 are amplifiers.
【００１８】図２は図１の中央断面図であり、ターニン
グロール３，３に載った大径管２、大径管２の内面を計
測する変位計１３、大径管２の外周面を計測する曲り計
測用第１変位計３１の配置を示す。FIG. 2 is a central sectional view of FIG. 1, in which the large diameter pipe 2 mounted on the turning rolls 3 and 3, the displacement gauge 13 for measuring the inner surface of the large diameter pipe 2, and the outer peripheral surface of the large diameter pipe 2 are measured. The arrangement of the first bend measurement displacement meter 31 is shown.
【００１９】以上に述べた大径管の寸法・形状測定装置
の作用を次に説明する。図１の曲り測定用第１変位計３
１での測定値をｘ、曲り測定用第２変位計３２での測定
値をｙ、曲り測定用第３変位計３３での測定値をｚとす
る。図３は曲りＭの演算説明図であり、ある点における
曲りＭはｙ−（ｘ＋ｚ）／２で求められる。ここで、あ
る点とは例えば測定を１゜毎に３６０回実施するとした
時のｎ番を示す。The operation of the size / shape measuring device for a large-diameter pipe described above will be described below. First displacement gauge 3 for bending measurement in FIG.
The measured value at 1 is x, the measured value at the bending measurement second displacement meter 32 is y, and the measured value at the bending measurement third displacement meter 33 is z. FIG. 3 is a diagram for explaining the calculation of the bend M, and the bend M at a certain point is obtained by y− (x + z) / 2. Here, a certain point indicates, for example, the nth number when the measurement is performed 360 times every 1 °.
【００２０】また、図１の第１管径測定手段１０の変位
計１３で左管端部２Ｌの管径Ｄ1を測定し、第２管径測
定手段２０の変位計２３で右管端部２Ｒの管内径Ｄ2を
測定する。図４（ａ），（ｂ）は本発明に係る曲りＭと
予想曲りＭexpの説明図であり、（ａ）は図３の要領で
演算した曲りＭを示す。また、このときの管端部の管内
径はＤ1及びＤ2である。そして、管中央部の管径は公称
径Ｄnに良好に近似する。（ｂ）は次工程で管端部を矯
正したと仮定したときの予想姿を示し、管端部を公称径
Ｄnに矯正したときに曲りがＭexpに変化したことを示
す。ただし、このＭexpは矯正前の予測値であるから、
「予想曲り」と呼ぶ。この予想曲りＭexpは（ａ）に示
した（Ｄ1−Ｄn）と（Ｄ2−Ｄn）との平均値を実測の曲
りＭから差し引いたものに合致するから、次式で規定さ
れる。The pipe diameter D1 of the left pipe end 2L is measured by the displacement meter 13 of the first pipe diameter measuring means 10 of FIG. 1, and the right pipe end 2R is measured by the displacement meter 23 of the second pipe diameter measuring means 20. The inner diameter D2 of the tube is measured. 4A and 4B are explanatory views of the bend M and the expected bend Mexp according to the present invention, and FIG. 4A shows the bend M calculated according to the procedure of FIG. The inner diameters of the pipe ends at this time are D1 and D2. The pipe diameter at the center of the pipe is well approximated to the nominal diameter Dn. (B) shows an expected image assuming that the pipe end is corrected in the next step, and shows that the bend changes to Mexp when the pipe end is corrected to the nominal diameter Dn. However, since this Mexp is a predicted value before correction,
Call it "expected bend". This expected bend Mexp matches the value obtained by subtracting the average value of (D1-Dn) and (D2-Dn) shown in (a) from the actually measured bend M, and is therefore defined by the following equation.
【００２１】[0021]
【数１】 [Equation 1]
【００２２】この予想曲りＭexpは、矯正後の曲りを予
測したものであり、作業者は実測した曲りＭに捕らわれ
ること無く、矯正作業の方針を決定することができる。
例えば、予想曲りＭexpが許容曲り以内であれば管端部
の真円度矯正のみを実施すればよい。This predicted bending Mexp is a prediction of the bending after straightening, and the operator can determine the straightening work policy without being caught by the actually measured bending M.
For example, if the expected bend Mexp is within the allowable bend, only roundness of the pipe end may be corrected.
【００２３】図５（ａ），（ｂ）は従来例と本発明例と
の比較ヒストグラムであり、（ａ）は公称径９００ｍ
ｍ、板厚２０ｍｍ、長さ１２ｍを比較対象材として従来
技術に基づいて試験したところ、サンプル数（Ｎ）＝８
６において曲りＭの平均値が４．９×１０-4で標準偏差
は２．７×１０-4であったことを示す。これに対して、
（ｂ）の本発明によればサンプル数（Ｎ）＝８３におい
て予想曲りＭexpの平均値が３．５×１０-4で標準偏差
は１．９×１０-4であった。従って、本発明によれば平
均値及び偏差がともに小さいので次の矯正作業を効果的
に実施できる。5 (a) and 5 (b) are comparative histograms of the conventional example and the example of the present invention. FIG. 5 (a) shows a nominal diameter of 900 m.
m, a plate thickness of 20 mm, and a length of 12 m were tested based on the conventional technique, and the number of samples (N) = 8.
6 shows that the mean value of the bend M was 4.9 × 10 −4 and the standard deviation was 2.7 × 10 −4 . On the contrary,
According to the present invention of (b), the average value of the expected bend Mexp was 3.5 × 10 −4 and the standard deviation was 1.9 × 10 −4 at the number of samples (N) = 83. Therefore, according to the present invention, since both the average value and the deviation are small, the next correction work can be effectively performed.
【００２４】図６は本発明の大径管の寸法・形状測定装
置を製管フローに組込んだ例を示す図であり、製管圧延
機や溶接機からなる「製管工程」で小径の管を製造し、
次に拡管機で必要に応じて「拡管」する。そして、本発
明の寸法・形状測定装置で「真円度及び曲り」を測定
し、測定値が許容値以内であれば「合格」であるから、
「耐圧試験」、「非破壊試験」、「管端処理」などを実
施して「出荷」する。もし、測定値が許容値を超えてい
れば拡管機で矯正をし、再度寸法・形状測定装置で真円
度及び曲りを測定すればよい。このように寸法・形状測
定装置１を拡管機の直後に配置することにより、能率の
より矯正がなせる。FIG. 6 is a diagram showing an example in which the apparatus for measuring the size and shape of a large-diameter pipe of the present invention is incorporated in a pipe-making flow. Manufacture tubes,
Next, "expand" the tube with a tube expander if necessary. Then, the "circularity and bending" is measured by the dimension / shape measuring device of the present invention, and if the measured value is within the allowable value, it is "passed",
Perform "pressure resistance test", "non-destructive test", "pipe end treatment", etc. and "ship". If the measured value exceeds the permissible value, it may be corrected by a tube expander, and the roundness and bending may be measured again by the dimension / shape measuring device. By arranging the dimension / shape measuring device 1 immediately after the tube expander in this way, the efficiency can be more corrected.
【００２５】図７は本発明の大径管の寸法・形状測定装
置の好適配置例を示す図であり、第１拡管機５１と第２
拡管機５２と本発明の大径管の寸法・形状測定装置１を
図の通りに配置し、ラインからまだ径の小さな管を導入
し、先ず第２拡管機５２で管の中央から右管端部２Ｒの
間を拡管し、次に第１拡管機５１で管の中央から左管端
部２Ｌの間を拡管し、所定の寸法まで拡管された大径管
２を寸法・形状測定装置１に載せて、真円度及び曲りを
図り、更に予想曲りを演算する。この演算値に基づいて
左管端部２Ｌを第１拡管機５１で矯正し、また右管端部
２Ｒを第２拡管機５２で矯正し、矯正後の大径管２を再
度寸法・形状測定装置１で真円度及び曲りを計測する。
合格ならラインに戻す。即ち、図中に矢印で示す向きに
管若しくは大径管２を往復させればよい。FIG. 7 is a view showing a preferred arrangement example of the size / shape measuring device for a large-diameter pipe of the present invention.
The pipe expander 52 and the large-diameter pipe size / shape measuring device 1 of the present invention are arranged as shown in the figure, and a pipe having a smaller diameter is introduced from the line. First, the second pipe expander 52 is operated from the center to the right pipe end. The pipe between the portions 2R is expanded, and then the first pipe expander 51 expands between the center of the pipe and the left pipe end 2L, and the large diameter pipe 2 expanded to a predetermined size is used as the dimension / shape measuring device 1. Put it on the table to measure the roundness and the curve, and to calculate the expected curve. Based on this calculated value, the left pipe end 2L is straightened by the first pipe expander 51, the right pipe end 2R is straightened by the second pipe expander 52, and the straightened large diameter pipe 2 is measured again in size and shape. The roundness and bending are measured by the device 1.
If it passes, return to the line. That is, the pipe or the large-diameter pipe 2 may be reciprocated in the direction indicated by the arrow in the figure.
【００２６】このように、本発明によれば真円度と曲り
を同時に計測するので計測時間が短縮できる。そして、
曲りＭに基づいて曲りを矯正するのではなく、予想曲り
Ｍexpに基づいて矯正の方針を立てるので、矯正に要す
る時間が大幅に短縮できる。As described above, according to the present invention, the roundness and the bend are measured at the same time, so that the measuring time can be shortened. And
Since the bending is not corrected based on the bending M but a correction policy is set based on the expected bending Mexp, the time required for the correction can be significantly reduced.
【００２７】尚、本発明方法を実施する場合に、大径管
の寸法・形状測定装置１で大径管２の真円度と曲りを同
時に図ることが望ましいが、これに限るものではなく、
真円度計測→曲り計測→予想曲り演算又は曲り計測→真
円度計測→予想曲り演算のようにシリーズで実施しても
よい。計測時間は長くなるが、装置の構成及び配置に自
由度が増す。また、本発明に係る変位計１３，２３，３
１〜３３はレーザ、赤外線などを利用した非接触式距離
計であってもよく、例えば第１・第２拡管機５１，５２
のムーブに非接触式距離計を組込んで拡管中に矯正情報
を得るようにしてもよい。When carrying out the method of the present invention, it is desirable to simultaneously measure the roundness and bending of the large diameter pipe 2 by the size / shape measuring device 1 for the large diameter pipe, but the invention is not limited to this.
Roundness measurement → bend measurement → expected bend calculation or bend measurement → roundness measurement → expected bend calculation may be performed in series. Although the measurement time becomes long, the degree of freedom in the configuration and arrangement of the device increases. In addition, the displacement gauges 13, 23, 3 according to the present invention
1 to 33 may be non-contact type distance meters using laser, infrared ray, etc., for example, first and second tube expanders 51, 52
It is also possible to incorporate a non-contact distance meter into the move to obtain correction information during tube expansion.
【００２８】[0028]
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１の大径管の形状矯正方法は、公称径Ｄn
である大径管の左右管端部の管径測定値をＤ1、Ｄ2と
し、管の曲り測定値をＭとした場合に、（Ｄ1−Ｄn）と
（Ｄ2−Ｄn）との平均値を曲りＭから差し引いたものを
予想曲りＭexpとし、この予想曲りＭexpに基づいて形状
矯正を実施することを特徴とし、曲りＭに基づいて曲り
を矯正するのではなく、予想曲りＭexpに基づいて矯正
の方針を立てるので、矯正に要する時間が大幅に短縮で
きる。The present invention has the following effects due to the above configuration. The method for correcting the shape of a large diameter pipe according to claim 1 is the nominal diameter Dn.
When the pipe diameter measurement values of the left and right pipe ends of the large diameter pipe are D1 and D2, and the pipe bend measurement value is M, the average value of (D1-Dn) and (D2-Dn) is bent. What is subtracted from M is an expected bend Mexp, and a feature correction is performed based on this expected bend Mexp. Instead of correcting the bend based on the bend M, a correction policy based on the expected bend Mexp. Because it stands, the time required for correction can be greatly reduced.
【００２９】請求項２の大径管の寸法・形状測定装置
は、大径管の左・右管端部の径を測定する第１・第２管
径測定手段と、大径管の長手方向の曲りを計測する曲り
測定手段と、第１・２管径測定手段からの真円度情報及
び曲り測定手段からの曲り情報を得て矯正後の曲りを予
測する演算部とからなり、真円度と曲りを同時に計測す
るので計測時間が短縮できる。そして、曲りＭに基づい
て曲りを矯正するのではなく、予想曲りＭexpに基づい
て矯正させることも可能なので、矯正に要する時間を短
縮させることができる。A large-diameter pipe size / shape measuring device according to a second aspect of the present invention comprises first and second pipe diameter measuring means for measuring the diameters of the left and right pipe ends of the large-diameter pipe, and the longitudinal direction of the large-diameter pipe. Of the roundness, and a computing unit for predicting the bend after correction by obtaining the roundness information from the first and second pipe diameter measuring means and the bend information from the bend measuring means. Since the degree and bend are measured at the same time, the measurement time can be shortened. Since it is also possible to correct the bend based on the expected bend Mexp instead of correcting the bend based on the bend M, the time required for the correction can be shortened.
【図１】本発明に係る大径管の寸法・形状測定装置図FIG. 1 is a diagram of a large-diameter pipe size / shape measuring device according to the present invention.
【図２】図１の中央断面図FIG. 2 is a central sectional view of FIG.
【図３】本発明に係る曲りＭの演算説明図FIG. 3 is an explanatory diagram of calculation of a bend M according to the present invention.
【図４】本発明に係る曲りＭと予想曲りＭexpの説明図FIG. 4 is an explanatory diagram of a bend M and an expected bend Mexp according to the present invention.
【図５】従来例と本発明例との比較ヒストグラムFIG. 5 is a comparison histogram of a conventional example and an example of the present invention.
【図６】本発明の大径管の寸法・形状測定装置を製管フ
ローに組込んだ例を示す図FIG. 6 is a diagram showing an example in which the large-diameter pipe size / shape measuring device of the present invention is incorporated into a pipe manufacturing flow.
【図７】本発明の大径管の寸法・形状測定装置の好適配
置例を示す図FIG. 7 is a diagram showing a preferred arrangement example of a size / shape measuring device for a large-diameter pipe of the present invention.
【図８】真円度及び曲りの説明図FIG. 8 is an explanatory diagram of roundness and bending.
【図９】大径管の変形態様を示す図FIG. 9 is a view showing a deformation mode of a large diameter pipe.
１…大径管の寸法・形状測定装置、２…大径管、２Ｌ…
左管端部、２Ｒ…右管、１０…第１管径測定手段、１３
…変位計、２０…第２管径測定手段、２３…変位計、３
０…曲り測定手段、３１，３２，３３…曲り測定用変位
計、４０…演算部、４１…曲り演算部、４２…予想曲り
演算部。1 ... Large diameter pipe size / shape measuring device, 2 ... Large diameter pipe, 2L ...
Left pipe end portion, 2R ... right pipe, 10 ... first pipe diameter measuring means, 13
... Displacement meter, 20 ... Second pipe diameter measuring means, 23 ... Displacement meter, 3
0 ... Bending measurement means 31, 31, 32, 33 ... Bending measurement displacement gauge, 40 ... Calculation part, 41 ... Bend calculation part, 42 ... Expected bend calculation part.
Claims (2)
管径測定値をＤ1、Ｄ2とし、管の曲り測定値をＭとした
場合に、（Ｄ1−Ｄn）と（Ｄ2−Ｄn）との平均値を曲り
Ｍから差し引いたものを予想曲りＭexpとし、この予想
曲りＭexpに基づいて形状矯正を実施することを特徴と
した大径管の形状矯正方法。1. When (D1) and (D2) are pipe diameter measurement values at left and right pipe ends of a large-diameter pipe having a nominal diameter Dn and M is a pipe bending measurement value, (D1-Dn) and (D2- A method for correcting the shape of a large-diameter pipe, characterized in that a value obtained by subtracting the mean value of (Dn) from the curve M is subtracted from the curve M, and the curve is corrected based on this curve Mexp.
径測定手段と、大径管の右管端部の径を測定する第２管
径測定手段と、大径管の長手方向の曲りを計測する曲り
測定手段と、前記第１・２管径測定手段からの真円度情
報及び曲り測定手段からの曲り情報を得て矯正後の曲り
を予測する演算部とからなる大径管の寸法・形状測定装
置。2. A first pipe diameter measuring means for measuring the diameter of the left pipe end of the large diameter pipe, a second pipe diameter measuring means for measuring the diameter of the right pipe end of the large diameter pipe, and a large diameter pipe. From the bending measuring means for measuring the bending in the longitudinal direction of the, and the computing part for predicting the bending after correction by obtaining the roundness information from the first and second pipe diameter measuring means and the bending information from the bending measuring means. A large-diameter pipe dimension and shape measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27892794A JPH08141643A (en) | 1994-11-14 | 1994-11-14 | Large tube shape correcting method and device for measuring dimension and shape of large tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27892794A JPH08141643A (en) | 1994-11-14 | 1994-11-14 | Large tube shape correcting method and device for measuring dimension and shape of large tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08141643A true JPH08141643A (en) | 1996-06-04 |
Family
ID=17604023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27892794A Pending JPH08141643A (en) | 1994-11-14 | 1994-11-14 | Large tube shape correcting method and device for measuring dimension and shape of large tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08141643A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004025214A1 (en) * | 2002-09-12 | 2004-03-25 | Showa Denko K.K. | Method and apparatus for measuring shape of tube body |
| US6954991B2 (en) | 2002-09-12 | 2005-10-18 | Showa Denko K.K. | Method and apparatus for measuring shape of tubular body |
| EP2695685A1 (en) * | 2011-04-08 | 2014-02-12 | Nippon Steel & Sumikin Engineering Co., Ltd. | Pipe material correction apparatus and pipe material correction method |
| CN103962421A (en) * | 2013-01-25 | 2014-08-06 | 东邦钛株式会社 | Apparatus for correcting deformation of reaction vessel and method for correcting deformation of reaction vessel using same |
| CN107167061A (en) * | 2017-03-30 | 2017-09-15 | 浙江亚德复合材料有限公司 | A kind of pipe detection device |
| CN115824145A (en) * | 2022-12-05 | 2023-03-21 | 中色(天津)新材料科技有限公司 | Automatic detection and correction equipment and method for twisting degree of aluminum alloy woodworking machinery section bar |
| CN117324434A (en) * | 2023-12-01 | 2024-01-02 | 常州市一马机械有限公司 | Automatic steel pipe internal and external roundness detection device and detection method |
-
1994
- 1994-11-14 JP JP27892794A patent/JPH08141643A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004025214A1 (en) * | 2002-09-12 | 2004-03-25 | Showa Denko K.K. | Method and apparatus for measuring shape of tube body |
| US6954991B2 (en) | 2002-09-12 | 2005-10-18 | Showa Denko K.K. | Method and apparatus for measuring shape of tubular body |
| EP2695685A1 (en) * | 2011-04-08 | 2014-02-12 | Nippon Steel & Sumikin Engineering Co., Ltd. | Pipe material correction apparatus and pipe material correction method |
| EP2695685A4 (en) * | 2011-04-08 | 2014-08-27 | Nippon Steel & Sumikin Eng Co | Pipe material correction apparatus and pipe material correction method |
| CN103962421A (en) * | 2013-01-25 | 2014-08-06 | 东邦钛株式会社 | Apparatus for correcting deformation of reaction vessel and method for correcting deformation of reaction vessel using same |
| CN103962421B (en) * | 2013-01-25 | 2018-03-20 | 东邦钛株式会社 | The antidote of the reaction vessel of reaction vessel apparatus for correcting and the use device |
| CN107167061A (en) * | 2017-03-30 | 2017-09-15 | 浙江亚德复合材料有限公司 | A kind of pipe detection device |
| CN115824145A (en) * | 2022-12-05 | 2023-03-21 | 中色(天津)新材料科技有限公司 | Automatic detection and correction equipment and method for twisting degree of aluminum alloy woodworking machinery section bar |
| CN115824145B (en) * | 2022-12-05 | 2023-09-05 | 中色(天津)新材料科技有限公司 | Automatic detection and correction equipment and method for twisting degree of aluminum alloy woodworking mechanical section bar |
| CN117324434A (en) * | 2023-12-01 | 2024-01-02 | 常州市一马机械有限公司 | Automatic steel pipe internal and external roundness detection device and detection method |
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