EP2133159B1 - Verfahren zur herstellung eines nahtfreien rohres - Google Patents

Verfahren zur herstellung eines nahtfreien rohres Download PDF

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Publication number
EP2133159B1
EP2133159B1 EP08738871A EP08738871A EP2133159B1 EP 2133159 B1 EP2133159 B1 EP 2133159B1 EP 08738871 A EP08738871 A EP 08738871A EP 08738871 A EP08738871 A EP 08738871A EP 2133159 B1 EP2133159 B1 EP 2133159B1
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EP
European Patent Office
Prior art keywords
mandrel bar
longitudinal direction
along
rolling
pipe
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.)
Not-in-force
Application number
EP08738871A
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English (en)
French (fr)
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EP2133159A1 (de
EP2133159A4 (de
Inventor
Yusuke Sendai
Masatomo Kishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel and Sumitomo Metal Corp
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Publication date
Application filed by Nippon Steel and Sumitomo Metal Corp filed Critical Nippon Steel and Sumitomo Metal Corp
Publication of EP2133159A1 publication Critical patent/EP2133159A1/de
Publication of EP2133159A4 publication Critical patent/EP2133159A4/de
Application granted granted Critical
Publication of EP2133159B1 publication Critical patent/EP2133159B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/78—Control of tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process

Definitions

  • the present invention relates to a method of manufacturing a seamless pipe or tube (see claim 1), and particularly relates to a method of manufacturing a seamless pipe or tube that is capable of making uniform the wall thickness distribution of the pipe or tube along the longitudinal direction of the pipe or tube.
  • pipe or tube is reffered to as “pipe” when deemed appropriate.
  • a mandrel mill there have been conventionally used a 2-roll type mandrel mill in which two grooved rolls opposed are disposed in each rolling stand, and between adjacent rolling stands, the rolling directions of the grooved rolls differ by 90°, and a 3-roll type mandrel mill in which three grooved rolls are disposed in each rolling stand such that the angle formed by the rolling directions is 120°, and between adjacent rolling stands, the rolling directions of the grooved roll differ by 60°.
  • a 4-roll type mandrel mill in which four grooved rolls are disposed in each rolling stand such that the angle formed by the rolling directions is 90° has also been applied.
  • a mandrel bar is inserted into the inside of a pipe, and between this mandrel bar and the grooved rolls disposed in a rolling stand, the pipe is subjected to drawing and rolling.
  • the pipe is subjected to drawing and rolling.
  • each mandrel bar is subjected to circulative use, thus tending to be non-uniformly worn in the longitudinal direction thereof.
  • the mandrel bar makes a non-uniform thermal expansion in the longitudinal direction thereof due to the heat resulting from the thermal conduction from the portions thereof where it is contacted with the pipe, the process heat generation involved in the drawing and rolling, and the like.
  • the wall thickness distribution of a pipe after it being subjected to drawing and rolling, along the longitudinal direction of the pipe tends to be non-uniform.
  • Patent Document 1 JP59-27704A
  • Patent Document 2 JP61-269909A
  • Patent Document 3 JP2001-293511A
  • the method stated in Patent Document 1 is a method which measures the temperature distribution of a mandrel bar along the longitudinal direction of the mandrel bar after completion of the drawing and rolling; from the result of this measurement, calculates the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar during the drawing and rolling; and on the basis of this calculated outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar, adjusts the setting position of the grooved roll in the rolling direction at the next timing for being used for drawing and rolling.
  • the method stated in Patent Document 1 gives no consideration about the wear of a mandrel bar and the outside diameter distribution of each mandrel bar along the longitudinal direction of each mandrel bar. Therefore, with the method stated in Patent Document 1, the wall thickness distribution of a pipe along the longitudinal direction in the pipe after completion of the drawing and rolling cannot be made sufficiently uniform.
  • Patent Document 2 is a method which, on the basis of a typical value of amount of wear of a mandrel bar that is calculated on the basis of the number of pipes subjected to drawing and rolling per mandrel bar, a typical value of amount of thermal expansion of a mandrel bar that is calculated on the basis of the temperature measurement for the mandrel bar after completion of the drawing and rolling, and the like, adjusts the setting position of the grooved roll in the rolling direction when this mandrel bar is used for the subsequent drawing and rolling.
  • Patent Document 2 adjusts the setting position of the grooved roll in the rolling direction in consideration of the amount of wear and the amount of thermal expansion of a mandrel bar, it gives no consideration about the distribution of the amount of wear and the amount of thermal expansion in the longitudinal direction. Therefore, with the method stated in Patent Document 2, the wall thickness distribution of a pipe along the longitudinal direction of the pipe after completion of the drawing and rolling cannot be made sufficiently uniform.
  • Patent Document 3 is a method which, on the basis of the measured wall thickness distribution of a pipe along the longitudinal direction of the pipe in the hot state after it being subjected to the drawing and rolling step, the measured outside diameter distribution of a mandrel bar along the longitudinal direction of the mandrel bar before it being used for drawing and rolling, and the like, adjusts the setting position of the grooved roll in the rolling direction when the subsequent pipe is subjected to drawing and rolling.
  • this method utilizes the measured wall thickness distribution of a pipe along the longitudinal direction of the pipe when a mandrel bar different from the mandrel bar which was used in obtaining the measurement is employed for drawing and rolling the subsequent pipe, thus with this method, the outside diameter distribution in each mandrel bar along the longitudinal direction of each mandrel bar is not sufficiently reflected. Therefore, with the method stated in Patent Document 3, the wall thickness distribution of a pipe along the longitudinal direction of the pipe after completion of the drawing and rolling cannot be made sufficiently uniform.
  • the present invention has been made in view of such prior art, and it is a subject thereof to provide a method of manufacturing a seamless pipe or tube that is capable of making more uniform the wall thickness distribution of a pipe or tube along the longitudinal direction of the pipe or tube than the prior art.
  • the present invention provides a method of manufacturing a seamless pipe or tube including a step of drawing and rolling a pipe or tube, into the inside of which a mandrel bar is inserted, by a mandrel mill provided with a plurality of rolling stands in which a plurality of grooved rolls are disposed respectively, the method being characterized in that it comprises: a first step of measuring an outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at normal temperature; a second step of measuring a temperature distribution of the mandrel bar along the longitudinal direction of the mandrel bar after it being used for the drawing and rolling step; a third step of measuring a wall thickness distribution of a pipe or tube in the hot state after it being subjected to drawing and rolling with the mandrel bar being inserted thereinto, along the longitudinal direction of the pipe or tube; a fourth step of, on the basis of the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at normal temperature
  • the method according to the present invention measures the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at normal temperature at the first step.
  • the term "normal temperature” refers to a temperature state before the mandrel bar is first used for drawing and rolling, or a temperature state in which a sufficiently long time period (approx. 30 minutes or longer) has elapsed with the mandrel bar having been kept unused after it being used for drawing and rolling.
  • a sufficiently long time period approximately 30 minutes or longer
  • the method according to the present invention measures, at the second step, the temperature distribution of the mandrel bar along the longitudinal direction of the mandrel bar after it being used for the drawing and rolling step (for example, measures just after the mandrel bar being extracted from the pipe for which the drawing and rolling has been completed, or just while the mandrel bar being conveyed for circulative use in the mandrel bar conveyor line).
  • This temperature distribution of the mandrel bar along the longitudinal direction of the mandrel bar is in correlation to the distribution of amount of thermal expansion of the mandrel bar along the longitudinal direction of the mandrel bar.
  • the method according to the present invention measures a wall thickness distribution of the pipe or tube in the hot state after it being subjected to drawing and rolling with the mandrel bar being inserted thereinto, along the longitudinal direction of the pipe or tube.
  • the term "hot state” refers, needless to say, to the state just after the drawing and rolling has been completed, and also a state in which the pipe or tube is sufficiently red.
  • the distribution of amount of wear of the mandrel bar along the longitudinal direction of the mandrel bar and the distribution of amount of thermal expansion of the mandrel bar along the longitudinal direction of the mandrel bar have an effect.
  • the wall thickness distribution of the pipe or tube along the longitudinal direction of the pipe or tube in the hot state includes information about the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar that involves both the amount of wear and the amount of thermal expansion at the time of being used for drawing and rolling. Therefore, if the above outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar that has been predicted is corrected on the basis of the wall thickness distribution of the pipe or tube along the longitudinal direction of the pipe or tube that has been measured at the third step, the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling can be calculated with high accuracy.
  • the method according to the present invention on the basis of the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at normal temperature that has been measured at the first step, and the temperature distribution of the mandrel bar along the longitudinal direction of the mandrel bar that has been measured at the second step, predicts the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling, and corrects the predicted outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar on the basis of the wall thickness distribution of the pipe or tube along the longitudinal direction of the pipe or tube that has been measured at the third step, thereby calculates the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling.
  • the method according to the present invention when inserting the mandrel bar into the inside of the pipe or tube at the next timing for being used for drawing and rolling, adjusts the setting position of the grooved roll in the rolling direction on the basis of the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar that has been calculated at the fourth step.
  • the method according to the present invention adjusts the setting position of the grooved roll in the rolling direction on the basis of the calculated outside diameter distribution of the mandrel bar of the longitudinal direction of the mandrel bar.
  • the method according to the present invention it is possible to provide setting position adjustment of the grooved roll in the rolling direction in consideration of both the distribution of amount of wear of the mandrel bar along the longitudinal direction of the mandrel bar and the distribution of amount of thermal expansion of the mandrel bar along the longitudinal direction of the mandrel bar with the outside diameter distribution of each mandrel bar along the longitudinal direction of each mandrel bar being reflected in the adjustment, thus the wall thickness distribution of the pipe or tube along the longitudinal direction of the pipe can be made more uniform than is possible with the conventional method.
  • Figure 1 is a schema schematically illustrating an apparatus configuration of a mandrel mill (a retained mandrel mill using a bar retainer) to which a drawing and rolling step included in the method for manufacturing a seamless pipe according to one embodiment of the present invention is applied.
  • Figures 2 are schemas for explaining the contents of operation to be performed by a control apparatus shown in Figure 1
  • Figure 2A illustrates an outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B
  • Figure 2B illustrates a wall thickness distribution of the pipe P along the longitudinal direction of the pipe P.
  • a mandrel mill M shown in Figure 1 a plurality of mandrel bars B (in Figure 1 , only one is shown) are used in a circulative manner.
  • a sizing mill for performing sizing of a pipe P (such as a sizer, or the like) S is arranged downstream of the mandrel mill M.
  • the outside diameter distribution along the longitudinal direction at normal temperature is previously measured. And, these outside diameter distributions along the longitudinal direction at normal temperature that have been measured are inputted to a control apparatus 2, and are stored by each of mandrel bars B. These outside diameter distributions of the mandrel bars along the longitudinal directions of the mandrel bars at normal temperature are measured using a known optical outside diameter meter, or the like, for example, just before the mandrel bars being conveyed in a mandrel bar conveyor line for circulative use.
  • each mandrel bar B the temperature distribution along the longitudinal direction after it being used for the drawing and rolling step is measured. And, these temperature distributions along the longitudinal directions that have been measured are inputted to the control apparatus 2, and are stored by each of mandrel bars B.
  • This temperature distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B is measured, using a radiation thermometer (not shown) arranged, for example, on the inlet side of the mandrel mill M, in the course of the mandrel bar B being extracted from the pipe for which drawing and rolling has been completed.
  • a radiation thermometer not shown
  • the temperature distribution along the longitudinal direction is measured using a radiation thermometer arranged on this conveyor line.
  • an ultrasonic or radioactive wall thickness gauge 1 is arranged on the outlet side of the sizing mill S. And, by this wall thickness gauge 1 and the control apparatus 2, the wall thickness distribution of the pipe P in the hot state which has been passed through the drawing and rolling step in the mandrel mill M, along the longitudinal direction of the pipe P is measured. Specifically, the wall thickness gauge 1 measures the average wall thickness in the circumferential direction of the pipe P, and this measured average wall thickness along the circumferential direction is inputted to the control apparatus 2.
  • the control apparatus 2 As the pipe P is advanced in the longitudinal direction, the average wall thicknesses along the circumferential direction for portions of the pipe P that are in different places along the longitudinal direction are successively inputted to the control apparatus 2, whereby the longitudinal direction distribution of the average wall thicknesses along the circumferential direction is calculated.
  • a configuration in which the wall thickness gauge 1 is arranged on the outlet side of the sizing mill S has been exemplified, however, the present invention is not limited thereto, and the wall thickness gauge 1 may be installed in any other appropriate place, such as on the outlet side of the mandrel mill M.
  • the control apparatus 2 predicts the outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling (the "outside diameter in the hot state (before correction)" line shown in Figure 2A ).
  • the outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B at normal temperature is a distribution with which the outside diameter is decreased from the front edge to the rear edge
  • the temperature distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B (not shown) is a distribution with which the temperature is increased from the front edge to the rear edge
  • the predicted outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B at the time of being used for drawing and rolling is a distribution with which the outside diameter is increased from the front edge to the rear edge.
  • the control apparatus 2 corrects the outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B that has been predicted as described above on the basis of the wall thickness distribution of the pipe P in the hot state after it being subjected to drawing and rolling with the mandrel bar B being inserted thereinto, along the longitudinal direction of the pipe P (the "wall thickness in hot state" line shown in Figure 2B ).
  • wall thickness distribution of the pipe in the hot state along the longitudinal direction of the pipe is a distribution with which the wall thickness is increased from the front edge to the rear edge, the deviation of the rear edge wall thickness with respect to the front edge wall thickness being expressed as "a".
  • the control apparatus 2 corrects the predicted outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B on the basis of, for example, this wall thickness deviation "a". That is to say, if the rear edge wall thickness of the pipe P is larger than the front edge wall thickness thereof by the wall thickness deviation "a", the rear edge outside diameter of the mandrel bar B will be larger than the front edge outside diameter thereof by a dimension equal to double the wall thickness deviation "a".
  • control apparatus 2 performs a correction for changing the gradient of the predicted outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B such that the rear edge outside diameter is decreased with respect to the front edge outside diameter by a dimension equal to double the wall thickness deviation "a", thereby calculating the outside diameter distribution along the longitudinal direction after correction (the "outside diameter in the hot state (after correction)" line shown in Figure 2A ) as an outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B at the time of being using for drawing and rolling. And, these calculated outside diameter distributions along the longitudinal direction are stored by each of mandrel bars B.
  • the control apparatus 2 adjusts the setting position of the grooved roll R in the rolling direction on the basis of the outside diameter distribution of the mandrel bar B along the longitudinal direction of mandrel bar B.
  • the grooved roll R for which the setting position in the rolling direction is to be adjusted may be the grooved roll R disposed in each of all the rolling stands (#1 to #5 rolling stands shown in Figure 1 ) constituting the mandrel mill M, or the grooved roll R disposed in each of a part of the rolling stands (for example, #4 and #5 rolling stands for performing finish rolling, or the like). Specifically, this is explained as follows:
  • positional information on a bar retainer BR which holds the rear edge of the mandrel bar B is inputted.
  • the control apparatus 2 identifies the longitudinal direction portion of the mandrel bar B that is to be used when the pipe P is subjected to drawing and rolling in the rolling stand (for example, the #5 rolling stand, and hereinafter to be referred to as the "stand to be controlled") where the grooved roll R which is to be adjusted for setting position in the rolling direction is disposed.
  • the control apparatus 2 selects the outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B which is currently used for drawing and rolling. And, on the basis of the outside diameter distribution of the selected mandrel bar B along the longitudinal direction of the selected mandrel bar B, the control apparatus 2 calculates the outside diameter of the longitudinal direction portion of the mandrel bar B that is to be used in drawing and rolling the pipe P in the stand to be controlled.
  • the control apparatus 2 On the basis of the calculated outside diameter of the mandrel bar B, the control apparatus 2 performs a geometrical calculation to set the roll gap for the grooved roll R disposed in the stand to be controlled, and controls the rolling apparatus 3 in the stand to be controlled such that this roll gap is obtained.
  • the rolling apparatus 3 is composed of a cylinder, and the like, and adjusts the setting position of the grooved roll R in the rolling direction according to the roll gap set.
  • the wall thickness distribution of the pipe P in the hot state after it being subjected to the drawing and rolling step using the mandrel mill M, along the longitudinal direction of the pipe P is measured, and on the basis of this measured wall thickness distribution of the pipe P along the longitudinal direction of the pipe P, the outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B at the time of being used for drawing and rolling that is inserted into the inside of the pipe P is corrected, whereby the outside diameter distribution of the mandrel bar B along the longitudinal direction of the mandrel bar B can be calculated with high accuracy, and it is possible to perform setting position adjustment in the rolling direction of the grooved roll R in consideration of both the distribution of amount of wear of the mandrel bar B along the longitudinal direction of the mandrel bar B and the distribution of amount of thermal expansion of the mandrel bar B along the longitudinal direction of the mandrel bar B.
  • the setting position of the grooved roll R in the rolling direction is adjusted on the basis of the outside diameter distribution along the longitudinal direction calculated for the mandrel bar B, thus it is possible to provide setting position adjustment of the grooved roll R in the rolling direction with the outside diameter distribution of each mandrel bar B along the longitudinal direction of each mandrel bar B being reflected in the adjustment. Therefore, with the method according to the present invention, the wall thickness distribution of the pipe P along the longitudinal direction of the pipe P can be made more uniform than is possible with the conventional method.
  • Figure 3 gives one example of results of measuring wall thickness distributions of the pipes along the longitudinal directions of the pipes after drawing and rolling by the method according to the present invention and methods pertaining to comparative examples.
  • the No. 1 shown in Figure 3 gives results of drawing and rolling a pipe by the same method as that stated in the aforementioned Patent Document 1 using a new mandrel bar (having an outside diameter of 248 mm).
  • a new mandrel bar having an outside diameter of 248 mm.
  • the outside diameter distribution along the longitudinal direction at normal temperature see a graph shown with a solid line in Column A in No. 1 in Figure 3
  • the outside diameter distribution along the longitudinal direction at normal temperature is uniform (248 mm), thus the outside diameter distribution along the longitudinal direction at the time of being used for drawing and rolling (see a graph shown with a broken line in Column A in No.
  • the No. 3 shown in Figure 3 which is unlike the case of the No. 2, gives results of having performed drawing and rolling of a pipe (results of having performed drawing and rolling of a pipe using a mandrel bar which is non-uniformly worn in the longitudinal direction) by a method which, in calculating the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling, takes into account not only the temperature distribution of the mandrel bar along the longitudinal direction of the mandrel bar that was measured after completion of the drawing and rolling, but also the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar that was measured at normal temperature.
  • a method which, in calculating the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling, takes into account not only the temperature distribution of the mandrel bar along the longitudinal direction of the mandrel bar that was measured after completion of the
  • the method according to the present invention measures the wall thickness distribution of a pipe in the hot state after it being subjected to the drawing and rolling step using the mandrel mill, and on the basis of this measured wall thickness distribution of the pipe along the longitudinal direction of the pipe, corrects the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling that has been predicted for the mandrel bar which is inserted into the inside of the pipe, thus an outside diameter distribution substantially equivalent to the actual outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar which is performing drawing and rolling (see a graph shown with a broken line given in Column A in No.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Claims (1)

  1. Verfahren zur Herstellung eines nahtlosen Rohres (P) oder einer Röhre mit dem Schritt des Ziehens und Walzens eines Rohres (P) oder einer Röhre, in dessen/deren Inneres eine Dornstange (B) mittels einer Dornwalze (M) eingeführt wird, die mit mehreren Walzgerüsten (R) versehen ist, in welchen jeweils mehrere Profilwalzen angeordnet sind, wobei das Verfahren dadurch gekennzeichnet ist, dass es aufweist:
    einen ersten Schritt des Messens einer Außendurchmesserverteilung der Dornstange (B) in Längsrichtung der Dornstange (B) bei Normaltemperatur;
    einen zweiten Schritt des Messens einer Temperaturverteilung der Dornstange (B) in Längsrichtung nach deren Verwendung für den Zieh- und Walzschritt;
    einen dritten Schritt des Messens einer Wanddickenverteilung eines Rohres (P) oder einer Röhre in Längsrichtung des Rohres (P) oder der Röhre, nachdem dieses/diese mit darin eingeführter Dornstange (B) einem Ziehen und Walzen unterzogen wurde, im warmen Zustand;
    einen vierten Schritt des Vorhersagens einer Außendurchmesserverteilung der Dornstange (B) in Längsrichtung der Dornstange (B) zum Zeitpunkt der Verwendung für das Ziehen und das Walzen, basierend auf der im ersten Schritt bei Normaltemperatur gemessenen Außendurchmesserverteilung der Dornstange (B) in Längsrichtung der Dornstange (B) und der im zweiten Schritt gemessenen Temperaturverteilung der Dornstange (B) in Längsrichtung der Dornstange (B), und des Korrigierens der vorhergesagten Außendurchmesserverteilung der Dornstange (B) in Längsrichtung der Dornstange (B) auf der Basis der im dritten Schritt gemessenen Wanddickenverteilung des Rohres (P) oder der Röhre in Längsrichtung des Rohres (P) oder der Röhre, wodurch die Außendurchmesserverteilung der Dornstange (B) in Längsrichtung der Dornstange (B) zum Zeitpunkt der Verwendung für das Ziehen und Walzen berechnet wird; und
    einen fünften Schritt des Anpassens der Anstellposition der Profilwalze in der Walzrichtung, beim Einführen der Dornstange (B) in das Innere des Rohres (P) oder der Röhre bei der nächsten Verwendung für das Ziehen oder Walzen, basierend auf der im vierten Schritt berechneten Außendurchmesserverteilung der Dornstange (B) in Längsrichtung der Dornstange (B).
EP08738871A 2007-03-30 2008-03-26 Verfahren zur herstellung eines nahtfreien rohres Not-in-force EP2133159B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007092996 2007-03-30
PCT/JP2008/055645 WO2008123276A1 (ja) 2007-03-30 2008-03-26 継目無管の製造方法

Publications (3)

Publication Number Publication Date
EP2133159A1 EP2133159A1 (de) 2009-12-16
EP2133159A4 EP2133159A4 (de) 2011-10-26
EP2133159B1 true EP2133159B1 (de) 2013-01-23

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JP (1) JP5041304B2 (de)
CN (1) CN101711190B (de)
WO (1) WO2008123276A1 (de)

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ITMI20121559A1 (it) * 2012-09-19 2014-03-20 Sms Innse Spa Miglioramento in un impianto di laminazione
KR101982515B1 (ko) * 2018-01-31 2019-08-28 서한산업(주) 샤프트 제작장치 및 이를 이용한 샤프트 제작방법
KR102141689B1 (ko) * 2020-01-07 2020-08-06 주식회사 오필 관거 보수보강 튜브 와인딩식 제조를 위한 내측 튜브 자동 적재 유닛과 관거 보수보강 튜브 와인딩식 제조 장치 및 방법
CN114515764A (zh) * 2022-02-16 2022-05-20 杭州浙达精益机电技术股份有限公司 一种热轧钢管的壁厚及高温在线测量***
CN116890033B (zh) * 2023-09-11 2023-12-19 江苏常宝钢管股份有限公司 一种管材制备方法

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JP2001293511A (ja) * 2000-04-11 2001-10-23 Sumitomo Metal Ind Ltd 金属管の延伸圧延法および延伸圧延機
JP3494131B2 (ja) * 2000-07-27 2004-02-03 住友金属工業株式会社 継目無鋼管の製造ラインで用いられる圧延制御方法およびそれを用いた製造装置
JP4003463B2 (ja) * 2002-01-28 2007-11-07 住友金属工業株式会社 継目無鋼管の製造方法
JP4389869B2 (ja) * 2003-03-26 2009-12-24 住友金属工業株式会社 継目無管の製造方法
RU2319564C1 (ru) * 2003-10-07 2008-03-20 Сумитомо Метал Индастриз, Лтд. Способ и устройство для регулирования положений при прокатке прокатных валков трехвалковой клети стана для прокатки бесшовных труб на оправке
DE602005024782D1 (de) * 2004-03-30 2010-12-30 Sumitomo Metal Ind Verfahren und vorrichtung zur steuerung des walzens von rohren mit festem durchmesser

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JPWO2008123276A1 (ja) 2010-07-15
WO2008123276A1 (ja) 2008-10-16
CN101711190A (zh) 2010-05-19
EP2133159A4 (de) 2011-10-26
JP5041304B2 (ja) 2012-10-03
CN101711190B (zh) 2011-10-12

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