WO2007015484A1 - 管のきず検出装置及び方法 - Google Patents
管のきず検出装置及び方法 Download PDFInfo
- Publication number
- WO2007015484A1 WO2007015484A1 PCT/JP2006/315216 JP2006315216W WO2007015484A1 WO 2007015484 A1 WO2007015484 A1 WO 2007015484A1 JP 2006315216 W JP2006315216 W JP 2006315216W WO 2007015484 A1 WO2007015484 A1 WO 2007015484A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rolling
- measured
- stands
- thickness
- rolling load
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/12—Rolling load or rolling pressure; roll force
-
- 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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
Definitions
- the present invention relates to a pipe flaw detection device and a detection method. More specifically, the present invention relates to a tube flaw detection device and a detection method for automatically detecting flaws generated in a raw tube produced by rolling a holo-shell using a mandrel mill. .
- Figs. 5 (a) to 5 (d) are explanatory diagrams showing various kinds of flaws generated in a raw pipe produced by rolling a holo-shell using a mandrel mill.
- FIG. 5 (a) shows an inner surface dent flaw which is the dent 4 on the inner surface of the raw tube P.
- FIG. Fig. 5 (b) shows a holed flaw, which is a hole 5 reaching the outer surface of the raw tube P by the progress of the inner surface flaws.
- FIG. 5 (d) which is a circumferential cross-sectional view of the raw tube P in FIGS. 5 (c) and 5 (c), shows a wrinkle that is a portion 6 where the outer surface of the raw tube P is folded inward. Indicates a flaw. All of these flaws are a major cause of defective pipes.
- the mandrel mill is arranged on the outlet side of the mandrel mill in order to suppress fluctuations in the wall thickness of the pipe end and uneven thickness in the circumferential direction by rolling using a mandrel mill.
- the invention is disclosed in which the thickness of the raw tube rolled by the mandrel mill is measured by the thickness meter, and the rolling conditions of the mandrel mill are appropriately changed based on the measurement result.
- Patent Document 1 Japanese Patent Laid-Open No. 7-246414
- Patent Document 2 JP-A-8-71616
- Patent Document 3 Japanese Patent Laid-Open No. 2001-293503
- Patent Document 4 JP 2002-35817 A
- Patent Document 5 Japanese Patent Laid-Open No. 2003-220403
- Patent Document 6 Japanese Patent Application Laid-Open No. 2004-337941
- the thickness gauges used on the exit side of the mandrel mill disclosed in Patent Documents 1 to 6 are designed to reduce the wall thickness of the raw pipe such as fluctuations in the thickness at the end of the pipe and uneven thickness in the circumferential direction. It is used exclusively for measurement, and not for detecting various types of flaws that are partly formed in a blank rolled by using a mandrel mill. For this reason, as a matter of course, based on these inventions, it is not possible to automatically detect a flaw occurring in a raw pipe rolled using a mandrel mill.
- the inventor arranges a thickness meter for measuring the thickness of each stand in the rolling direction on the exit side of the mandrel mill, and changes the measured value of the thickness in the longitudinal direction of the raw tube. investigated. as a result,
- the measured thickness value corresponding to the area where the internal dents or holes are present partially decreases, and the If wrinkles occur, the thickness measurement corresponding to the area where wrinkles are present may partially increase, and
- a partial change in the measured thickness value in the longitudinal direction of the raw pipe is monitored by a thickness meter, and a partial change in the measured value of the rolling load is monitored.
- a base tube rolled using a mandrel mill by determining the occurrence of various types of flaws such as dents on the inner surface, pierced flaws and wrinkles when the amount exceeds a predetermined amount. Can be automatically detected with high accuracy.
- the present invention relates to a wall thickness meter for measuring the thickness of the hollow shell in the down direction of each of the plurality of stands that are arranged on the exit side of the mandrel mill, and the plurality of stands.
- a rolling load measuring device for measuring the rolling load in each, a measured value of the thickness of each holo shell in each rolling direction measured by a thickness meter, and a measured by a rolling load measuring device.
- the thickness measurement value in any of the rolling directions partially fluctuates by a predetermined amount or more based on the measurement value of the rolling load in each of the plurality of stands, and the measurement value of the rolling load in any of the stands is
- An apparatus for detecting flaws in a tube comprising: a determination device that determines the occurrence of flaws in a tube when it partially fluctuates by a predetermined amount or more.
- the present invention measures the thickness in the rolling direction of the hollow shell in each of the plurality of stands constituting the mandrel mill, and measures the rolling load in each of the plurality of stands.
- the measured value of the thickness of the hollow shell in the rolling direction at each of the plurality of stands partially fluctuates by a predetermined amount or more, and the measured value of the rolling load at each of the plurality of stands partially fluctuates by a predetermined amount or more.
- the present invention is a method for detecting a flaw in a raw tube, wherein the generation of a flaw in the raw tube is determined.
- defects such as inner surface dents, perforations, wrinkles, and the like, which are generated in a raw tube manufactured by rolling a holo-shell using a mandrel mill, are automatically detected. Therefore, it becomes possible to detect with high accuracy.
- FIG. 1 is an explanatory view schematically showing a configuration of a mandrel mill to which a flaw detection apparatus according to an embodiment is applied.
- FIG. 2 is an explanatory diagram schematically showing the configuration of the thickness gauge in FIG. 1.
- FIG.3 Holes are generated and attached to the tube! 2 is a graph showing an example of a measured value of the wall thickness measured by the wall thickness meter in FIG. 1 and a measured value of the rolling load measured by the rolling load measuring device in FIG.
- FIG. 4 When wrinkles occur, the measured values of the wall thickness measured by the wall thickness meter in Fig. 1 and the rolling load measured by the rolling load measuring device in Fig. 1 are measured for the ruby tube. It is a graph which shows an example with a measured value.
- FIG. 5 is an explanatory view showing various kinds of flaws generated in a raw pipe manufactured by rolling a holo-shell using a mandrel mill, and FIG. 5 (a) shows an inner surface flaw. (b) shows pierced flaws, and Fig. 5 (c) and Fig. 5 (d) show wrinkles.
- FIG. 1 is an explanatory diagram showing a configuration of a mandrel mill M to which the flaw detection device of the embodiment is applied.
- this mandrel mill M is composed of a total of 5 stands from # 1 stand to # 5 stand.
- This mandrel mill M is a two-roll mandrel in which a pair of opposed perforated rolling rolls R are alternately arranged on each of the # 1 stand to # 5 stand with the rolling direction shifted by 90 ° between adjacent stands. It is a mill.
- the hollow shell P is stretched and rolled by the mandrel bar B inserted into the hollow shell P and the perforated rolling rolls R arranged in the # 1 stand to # 5 stand, respectively. Is manufactured.
- the flaw detection device 100 is arranged on the exit side of the mandrel mill M configured as described above, and in the down direction of the holo-shell P in the # 1 to # 5 stands of the mandrel mill M.
- Thickness gauge 1 that measures the wall thickness
- # 1 to # 5 rolling load measuring device 2 that measures the rolling load at the stand
- a determination device 3 for determining the presence or absence of a flaw in the raw pipe P based on the thickness measurement value and the rolling load measurement value in the # 1 to # 5 stands measured by the rolling load measurement device 2 is provided.
- a ⁇ -ray thickness gauge that measures the thickness based on the attenuation amount of ⁇ -rays transmitted through the raw tube P is used.
- This thickness gauge 1 has a plurality of ⁇ -ray projectors l la, 12a, which are arranged so that the irradiation direction of ⁇ -rays coincides with the rolling direction of the hollow shell ⁇ ⁇ ⁇ ⁇ in the # 1 stand to # 5 stand, Opposite each ⁇ -ray projector l la, 12a via P It is possible to continuously measure the average wall thickness of the raw tube ⁇ in the longitudinal direction of the tube ⁇ in each ⁇ -ray irradiation direction. Composed.
- FIG. 2 is an explanatory diagram schematically showing the configuration of the thickness gauge 1 in FIG.
- the thickness gauge 1 is an odd-numbered stand (odd stand) # 1, # 3, and # 5.
- a load cell is used as the rolling load measuring device 2, and each stand
- the rolling load applied in # 1 to # 5 can be measured continuously in the longitudinal direction of the holo-shell P.
- the rolling load measuring device according to the present invention is not limited to this load cell.
- the rolling load is calculated based on the pressure value of a hydraulic rolling device that adjusts the rolling position of the perforated rolling roll R. Let's ask for it.
- the measured thickness values (average thickness) in the rolling direction (lch and 2ch) of the raw tube P measured by the thickness meter 1 and the rolling load measuring device 2 # 1 to # 5 are input with rolling load measurement values.
- the determination device 3 determines the occurrence of flaws in the raw tube P based on these input data.
- Judgment device 3 is used when the thickness measurement value in any of the rolling directions partially fluctuates by a predetermined amount or more and the rolling load measurement value in any stand partially fluctuates by a predetermined amount or more. Judge that P is flawed.
- FIG. 3 shows the measured thickness of the blank tube in which the perforated flaw is generated, measured by the thickness meter 1 in FIG. 1, and the rolling load measuring device 2 in FIG.
- Fig. 3 (a) shows the measured value of the wall thickness in the rolling direction lch in Fig. 2, and Fig. 3 (b) shows the measured value in the rolling direction 2ch in Fig. 2. Indicates the measured thickness.
- Fig. 3 (c) shows the measured value of rolling load of # 2 stand.
- the distance (m) from the tube tip which is the horizontal axis of the graphs in Figs. 3 (a) to 3 (c), is the distance from the tip of the rolled tube P after rolling.
- the distance from the time when the hollow shell P squeezes into the # 2 stand and the force passes is converted into the length of the raw tube P after rolling.
- the determination device 3 first compares the measured thickness values in the reduction direction lch and the reduction direction 2ch with predetermined threshold values! /, Respectively.
- the measured values of the wall thicknesses of the lch and 2ch in the rolling direction are differentiated in the longitudinal direction of the raw tube P, respectively.
- Each processed data is compared with a predetermined threshold value, or the measured values of the thicknesses of the respective lch and 2ch thicknesses of the normal blank tube P without any flaws are stored in advance.
- the difference between the measured values of the measured thicknesses of the lch and 2ch in each of the rolling directions may be compared with a predetermined threshold value.
- the measured value of the thickness of the 2ch in the rolling direction shown in the graph of Fig. 3 (b) exceeds the threshold value the measured value of the thickness is partially observed in this portion A1. Is determined to have fluctuated more than a predetermined amount.
- the threshold value may be specified by an absolute value, or may be specified by a ratio to the thickness of the raw tube. For example, when manufacturing a blank tube with a thickness of 20 mm, if there is a part that is 2 mm or more thin, it is determined that a hole is formed, and if there is a part that is 2 mm or more thick, it is determined that a wrinkle is generated. May be. Also, if the threshold value is 20% of the wall thickness of the blank tube, if there is a part that is thinner than 4 mm, it will be judged that a hole has been formed, and if there is a part that is thicker than 4 mm, You can determine that it has occurred.
- the determination device 3 determines whether the measured value of the rolling load at each stand partially fluctuates by a predetermined amount or more. That is, as in the case of the thickness measurement value described above, the measurement value of the rolling load at each stand is compared with a predetermined threshold value.
- the measured values of the rolling load at each stand are subjected to differential processing in the longitudinal direction of the holo-shell P. Compare the data after differential processing with a predetermined threshold value, or store the measured values of rolling load at each stand in a normal tube P without any flaws! It is also possible to compare the difference between this and the measured value of the rolling load at each measured stand with a predetermined threshold value. [0030] Then, when the threshold value is exceeded at the part A2 of the measured value of the rolling load of # 2 stand shown in the graph of FIG. 3 (c), the measured value of the rolling load is partially obtained at the part A2. Judged to be more than quantitative.
- the load value obtained by numerical calculation or the average load prediction value is empirically obtained in advance from the past actual load, and the load when the predicted load value fluctuates by 20% or more, for example, is calculated. It may be used as a threshold for judgment.
- the measured value of the rolling load for all the stands partially varies by a predetermined amount or more. There is no need to judge whether or not the force is applied.
- the measurement value of the thickness in any of the reduction directions locally fluctuates by a predetermined amount or more (in the example shown in the graph of FIG. 3, the measurement value of the thickness in the reduction direction 2ch fluctuates). ) And the measured value of the rolling load at any of the stands partially fluctuates more than a predetermined amount (in the example shown in the graph of Fig. 3, the measured value of the rolling load at # 2 stand fluctuates) It is determined that a scratch has occurred, and an alarm is issued by appropriate means, for example, a warning sound is generated from a speaker installed in the cab, or a lamp installed on the operation panel in the cab is flashed.
- the cause of the occurrence of perforated flaws is that the tension tension between the stands of the mandrel mill is large and the reduction of the stand is too large.
- the rotational speed of the perforated rolling roll R should be adjusted so as to reduce the tension between the stands.
- it is effective to open the gap of the perforated rolling roll R of this stand. In order to determine whether the cause is the former or the latter, it is only necessary to check the load fluctuation.
- Fig. 4 shows the measured value of the wall thickness measured by the wall thickness meter 1 in Fig. 1 and the measured value of the rolling load measured by the rolling load measuring device 2 in Fig. Fig. 4 (a) shows the measured thickness of the lch in the rolling direction, Fig. 4 (b) shows the measured thickness of the 2 ch in the rolling direction, and Fig. 4 (c) shows # 5.
- the measured value of the rolling load of the stand is shown.
- the horizontal axis and vertical axis of the graphs in FIGS. 4 (a) to 4 (c) are the same as the horizontal axis and vertical axis of the graphs in FIGS. 3 (a) to 3 (c).
- the determination device 3 first compares the measured values of the thicknesses in the reduction direction lch and 2ch with predetermined threshold values, respectively. If the thickness B of the thickness measurement value in the rolling direction lch shown in the graph of FIG. 4 (a) exceeds the threshold value, the thickness measurement value at this location B1 partially exceeds the predetermined amount. Judge that it is fluctuating.
- the determination device 3 determines whether the measured value of the rolling load at each stand partially fluctuates by a predetermined amount or more. That is, as in the case of the thickness measurement value described above, the measurement value of the rolling load at each stand is compared with a predetermined threshold value. When the measured value of the rolling load # 5 of the # 5 stand shown in Fig. 4 (c) exceeds the threshold value B2, the measured value of the rolling load at this portion B2 partially changes by a predetermined amount or more. Judge that [0040] As shown in the example of the graph of FIG. 4, when only the measured value of the wall thickness in the specific rolling direction lch partially fluctuates, the measured value of the rolling load is not necessarily partial for all the stands.
- the measured thickness value in any of the rolling directions partially fluctuates by a predetermined amount or more (in the example shown in the graph of FIG. 4, the measured thickness value of lch fluctuates) If the measured value of the rolling load at any of the stands partially fluctuates by more than a certain amount (in the example shown in the graph of Fig. 4, the measured value of the rolling load at the # 5 stand varies), Determines that a flaw has occurred and issues an alarm.
- the pipe flaw detection device according to the present invention is applied to a two-roll mandrel mill is taken as an example.
- the present invention is not limited to this.
- a four-roll mandrel mill in which four perforated rolling rolls having an angle of 90 ° in each rolling stand are arranged in each stand, and a rolling in each stand.
- the same applies to a three-roll mandrel mill in which three perforated rolling rolls with an angle of 120 ° are arranged, and the rolling roll roll-down direction is shifted by 60 ° between adjacent stands. That's right.
- control device for the mandrel mill in FIG. 1 and the determination device 3 are configured separately is taken as an example.
- the present invention is not limited to this, and the control device may also have the function of the determination device 3.
- the measurement results of the wall thickness meter 1 arranged on the outlet side and the measurement results of the rolling load measurement device 2 are often input to a general mandrel mill control device. Therefore, by programming the control device so that the same operation as the determination device 3 can be performed, the control device can also be used as the determination device 3, and the cost of the entire device can be reduced.
- the flaw detection device 100 of the present embodiment shown in FIG. 1 is applied to a two-roll mandrel mill M, and the determination device 3 determines the occurrence of flaws in the raw pipe. If it is determined that flaws are generated, the hole shape used when rolling the hollow shell P is determined according to the determination result. The roll gap and rotation speed of the rolling roll R were adjusted.
- the threshold value for the wall thickness is set to 20% of the target thickness of the blank tube
- the threshold value for the rolling load is set for the blank tube included in the same size and material classification. It was set as 20% of the past average actual load.
- the rate of occurrence of flaws in the tube (the number of tube P in which flaws occurred Z the number of rolled P tubes X 100) was 0.2 before the flaw was automatically detected by applying the present invention. It was possible to reduce significantly from% to 0.03%.
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2006800367048A CN101277772B (zh) | 2005-08-02 | 2006-08-01 | 管的缺陷检测装置及方法 |
EP06782094A EP1918034B1 (en) | 2005-08-02 | 2006-08-01 | Device and method for detecting flaw on tube |
BRPI0614305-9A BRPI0614305B1 (pt) | 2005-08-02 | 2006-08-01 | Aparelho e método de detecção de falha para um tubo matriz |
US12/068,044 US7707865B2 (en) | 2005-08-02 | 2008-02-01 | Flaw detection apparatus and method for tubes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-224608 | 2005-08-02 | ||
JP2005224608 | 2005-08-02 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/068,044 Continuation US7707865B2 (en) | 2005-08-02 | 2008-02-01 | Flaw detection apparatus and method for tubes |
Publications (1)
Publication Number | Publication Date |
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WO2007015484A1 true WO2007015484A1 (ja) | 2007-02-08 |
Family
ID=37708765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/315216 WO2007015484A1 (ja) | 2005-08-02 | 2006-08-01 | 管のきず検出装置及び方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7707865B2 (ja) |
EP (1) | EP1918034B1 (ja) |
CN (1) | CN101277772B (ja) |
BR (1) | BRPI0614305B1 (ja) |
WO (1) | WO2007015484A1 (ja) |
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RU2505366C1 (ru) * | 2011-08-17 | 2014-01-27 | Смс Меер Гмбх | Способ и устройство для изготовления труб методом холодной пилигримовой прокатки |
RU2507015C1 (ru) * | 2011-08-17 | 2014-02-20 | Смс Меер Гмбх | Способ и устройство для изготовления труб посредством холодного пильгерования |
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CN101480672B (zh) * | 2009-02-09 | 2011-02-09 | 玉溪玉杯金属制品有限公司 | 线材直度检测报警装置 |
IT1399900B1 (it) * | 2010-04-19 | 2013-05-09 | Sms Innse Spa | Impianto per la laminazione di tubi. |
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IT1397910B1 (it) * | 2010-01-28 | 2013-02-04 | Sms Innse Spa | Impianto per la laminazione di tubi. |
MX2012001764A (es) * | 2009-08-11 | 2012-02-29 | Sumitomo Metal Ind | Dispositivo para ajustar las posiciones de laminado de rodillos de mandrinado que constituyen un laminador de mandril de tres rodillos y metodo para fabricar tubos o tuberias sin costuras. |
EA201200813A1 (ru) * | 2010-01-05 | 2013-01-30 | Смс Иннсе Спа | Трубопрокатная установка |
ITUD20120115A1 (it) * | 2012-06-20 | 2013-12-21 | Danieli Automation Spa | Apparato per la rilevazione della difformita' di spessore di elementi tubolari e relativo procedimento |
KR101411766B1 (ko) * | 2012-11-30 | 2014-06-25 | 한국수력원자력 주식회사 | 사용후핵연료봉 탈피복장치 |
DE102014203422B3 (de) * | 2014-02-26 | 2015-06-03 | Sms Meer Gmbh | Verfahren und Computerprogramm zum Analysieren der Wanddickenverteilung eines Rohres |
RU2605391C1 (ru) * | 2015-08-10 | 2016-12-20 | Общество с ограниченной ответственностью НАУЧНО-ТЕХНИЧЕСКИЙ ЦЕНТР "БУРАН-ИНТЕЛЛЕКТ" | Установка неразрушающего контроля труб |
CN108597680A (zh) * | 2018-04-16 | 2018-09-28 | 山东迪龙电缆有限公司 | 一种轧型导体截面自动控制系统 |
RU194527U1 (ru) * | 2018-07-16 | 2019-12-13 | Общество с ограниченной ответственностью НАУЧНО-ТЕХНИЧЕСКИЙ ЦЕНТР "БУРАН-ИНТЕЛЛЕКТ" | Устройство для ультразвукового иммерсионного контроля качества труб |
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RU2311243C2 (ru) * | 2003-03-14 | 2007-11-27 | Сумитомо Метал Индастриз, Лтд | Способ изготовления трубы и устройство для его осуществления, устройство для получения информации об отклонении толщин и компьютерная программа |
MXPA05010257A (es) * | 2003-03-26 | 2005-11-17 | Sumitomo Metal Ind | Metodo para la fabricacion de un tubo sin costura. |
JP4356074B2 (ja) * | 2003-10-07 | 2009-11-04 | 住友金属工業株式会社 | 3ロール式マンドレルミルを構成する圧延ロールの圧下位置調整方法及び調整装置 |
EP1676651B1 (en) * | 2003-10-07 | 2011-01-26 | Sumitomo Metal Industries, Ltd. | Method and device for adjusting screw-down location of rolling roll forming three-roll mandrel mill |
JP2005193247A (ja) * | 2003-12-26 | 2005-07-21 | Sumitomo Metal Ind Ltd | 継目無鋼管の製造方法およびマンドレルミル |
-
2006
- 2006-08-01 EP EP06782094A patent/EP1918034B1/en not_active Ceased
- 2006-08-01 CN CN2006800367048A patent/CN101277772B/zh not_active Expired - Fee Related
- 2006-08-01 BR BRPI0614305-9A patent/BRPI0614305B1/pt active IP Right Grant
- 2006-08-01 WO PCT/JP2006/315216 patent/WO2007015484A1/ja active Application Filing
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2008
- 2008-02-01 US US12/068,044 patent/US7707865B2/en active Active
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2505366C1 (ru) * | 2011-08-17 | 2014-01-27 | Смс Меер Гмбх | Способ и устройство для изготовления труб методом холодной пилигримовой прокатки |
RU2507015C1 (ru) * | 2011-08-17 | 2014-02-20 | Смс Меер Гмбх | Способ и устройство для изготовления труб посредством холодного пильгерования |
Also Published As
Publication number | Publication date |
---|---|
EP1918034B1 (en) | 2012-06-20 |
BRPI0614305A2 (pt) | 2011-03-22 |
CN101277772B (zh) | 2011-06-08 |
BRPI0614305B1 (pt) | 2020-02-18 |
CN101277772A (zh) | 2008-10-01 |
US20080216537A1 (en) | 2008-09-11 |
EP1918034A4 (en) | 2009-08-26 |
EP1918034A1 (en) | 2008-05-07 |
US7707865B2 (en) | 2010-05-04 |
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