EP2640532B1 - Procédé de fabrication de tubes laminés à chaud sans soudure dans des laminoirs continus de tubes - Google Patents

Procédé de fabrication de tubes laminés à chaud sans soudure dans des laminoirs continus de tubes Download PDF

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Publication number
EP2640532B1
EP2640532B1 EP11785298.8A EP11785298A EP2640532B1 EP 2640532 B1 EP2640532 B1 EP 2640532B1 EP 11785298 A EP11785298 A EP 11785298A EP 2640532 B1 EP2640532 B1 EP 2640532B1
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EP
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Prior art keywords
pipe
mill
rolling
stand
diameter
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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
EP11785298.8A
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German (de)
English (en)
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EP2640532A1 (fr
Inventor
Rolf Kümmerling
Christoph Prasser
Gerd Homberg
Frank Hagemann
Gabriel Pereira
Winfried Braun
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Vallourec Deutschland GmbH
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Vallourec Deutschland GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills

Definitions

  • the invention relates to a method for the economic production of seamless hot-rolled tubes in Rohrkontiwalzwerken according to the preamble of claim 1, as known from EP 1 872 878 A1 is known.
  • Various methods used to make hot rolled seamless tubes are in the Steel tube manual (Vulkan-Verlag, Essen, 12th Edition 1995, pp. 107-111 ).
  • Typical products for such cases are, for example, pipes for the energy sector, for exploration and for the extraction of oil and gas.
  • the common dimension range is between approx. 60 and 273 mm in diameter and with wall thicknesses of approx. 5 to 15 mm.
  • the required capacity for tube rolling mills is approximately between 100,000 and 250,000 tonnes / year for these products.
  • the tube rolling mills are named as a whole according to the coming to use stretch rolling mill.
  • Rolling mills having an annual capacity in the above-mentioned range are impact bench mills, Assel mills and Diescherwalzwerke. In the latter two, cross-rolling mills are used for stretching.
  • the roll bar for cooling and lubrication is ejected laterally in the bar circulation and passed on the return side of the bar circulation a "new" rolling bar in the roll bar restraint system.
  • the Ausziehwalzwerk has in the known plant to the end of the last frame of the 2- or 3-Walzen-Rohrkontiwalzwerks a distance of approximately 10 to 12 m.
  • the removal of the billet from the roll bar begins as soon as the billet with its point runs into the 1st frame of the extracting mill. At this point in time, the stag is still partially in the Rohrkontiwalzwerk.
  • the roll bar is retracted. The top of the roll bar is at this time just before the 1st stand of the Ausziehwalzwerks.
  • the lumps must be reheated prior to finish rolling.
  • the temperature is different for different Luppenwanddicken different levels.
  • Thin-walled pipes cool faster than thick-walled pipes. With the same diameter in the outlet of the stretch-reducing or sizing mill, this influences the cold finished pipe diameter due to the different shrinkage dimension.
  • a second reason is that a cooling of the billets below about 600 ° C allows a normalization of the material, when subsequently reheated to temperatures above Ac3 in the reheating furnace.
  • This method is particularly economical due to the ability to roll multiple lengths continuously, d. H. according to the required tube length, a hollow block length is used, which results in stretching a multiple length, which is then divided after finish rolling with minimal scrap metal to the required single tube length.
  • Object of the present invention is to provide a method and a rolling mill, with the use of a Rohrkontiwalzwerks pipes produced economically even at relatively low annual demand and the aforementioned disadvantages of known Rohrkontiwalzwerke be avoided.
  • the mill should be simpler and less expensive to build.
  • the great advantage of the invention is that with the proposed method a very economical production of seamless tubes in premium quality with low annual demand is now possible in Rohrkontiwalzwerken, with their capacities are adapted to the needs.
  • Standard tube rolling mill Rolling mill according to the invention Vormaterialin 5,0m 3.6 m Hollow block length 12.0 m 9.0 m shell length 29.0 m 14.5 m Cooling bed length 42.0 m 16.0 m
  • the wall thickness decrease is limited to values below 9 mm, instead of the five to six stands used in the standard construction, according to the invention only three stands are required. In an advantageous embodiment of the invention, therefore, the wall thickness decrease is limited to less than 9 mm.
  • the ring cross-sectional area of the incoming hollow block is reduced to a smaller in cross-sectional diameter and wall thickness cross-sectional area in Rohrkontivon.
  • the wall thickness of the billet is identical to the wall thickness of this smaller cross-sectional area. In this case, it is typical for the method that the difference between the two cross-sectional areas is independent of the size of the wall thickness of the column.
  • Premium products for the exploration and production of oil and gas are generally subjected to heat treatment in the form of hardening and tempering after rolling. This eliminates the usual normalization and thus the investment of a reheating furnace.
  • the distance between the Rohrkontiwalzwerk and the removal of the pipe from the rod with accepting Vietnamese- or stretch-reducing mill can be reduced below the usual 10 - 12 m. Simply limiting to a single length of the billet allows shortening to about half. Further shortening becomes possible when the speed of the rolling rod is reduced. A lower limit for the distance results from the selected type of scaffolding change (lateral change or change in the rolling line) in the drafting unit.
  • the maximum travel of the rod specifies the required minimum clearance.
  • the rolling rod is subjected to a lower heat load due to the reduced wall thickness decrease and the reduced skeleton number, the expensive part of the rolling rod subject to wear can be correspondingly shorter, which adds to a large cost saving.
  • the cooling bed also becomes significantly shorter.
  • the part saws can also be saved.
  • two part saws are sufficient instead of the usual four saws.
  • the part saw can even be completely eliminated, since the required end cuts are made in the area of nondestructive testing which has one or more cutting units to cut out errors and to take samples.
  • roller tables for transporting the tubes can be designed significantly shorter. If a finishing line is attached directly to the stretch-reducing mill or sizing mill, a saw is enough to cut the head, so that the nondestructive testing of the pipes is not destroyed by unclean pipe ends.
  • tubes produced in particular in 3-Walzen-Rohrkontiwalzwerken have a very good concentricity, whereby the disadvantage of any lower application is compensated.
  • the rolling mill is designed as a 3-stand rolling mill with three rollers per scaffold.
  • the suitable choice of the starting material formats and the number of different calibers for the production of different tube finished diameters are of great importance.
  • the goal is to keep the necessary number of formats and calibres to be kept as low as possible.
  • Caliber refers to the outside diameter of the billet behind the 3-roll continuous tube rolling mill. Different sizes and calibers are required to manufacture different tube diameter.
  • DB D Pipe max ⁇ C 2 + C 3 / 1 + C 4 With: 1.04 ⁇ C 2 ⁇ 1.12 22 ⁇ C 3 ⁇ 28 - 0.03 ⁇ C 4 ⁇ 0.15
  • the constants describe the limits of the abilities relevant to the diameter changes of the aggregate mill (C5) or stretch-reducing mill (C2), continuous-tube rolling mill (C3) and cross-rolling mill (C4).
  • the constant C5 describes the maximum formability of the sizing mill and replaces the constant C2.
  • the pipe dimensions are thus in the typical range for a stretch-reducing mill.
  • FIG. 1 the known layout of a Rohrkontiwalzwerkes is shown as a total mill for rolling multiple lengths.
  • the total mill has a cross rolling mill (1) for punching a massive block not shown here to a hollow block, a drafting unit as 3-Walzen-Rohrkontiwalzwerk (2) for stretching the hollow block to a billet, a Ausziehwalzwalzwerk (3) for stripping the billet from the mandrel bar, a reheating furnace (4) for reheating the billet to rolling temperature, a stretch reducing mill (5) for rolling the billet to final dimension, a cooling bed (6), and a pipe end finishing saw field (7).
  • the pullout mill (3) consists of 3 stands with three rollers each to pull the billet off the roll bar.
  • FIG. 2 shows in comparison to the plant layout of the rolling mill according to the invention. In direct comparison, it can be seen that the plant concept according to the invention is characterized by a significantly reduced overall length.
  • the investment costs for the rolling mill according to the invention are correspondingly lower in comparison to the known continuous rolling mill.
  • the rolling mill is equipped with an in-line test unit, not shown here, which further reduces investment and operating costs.
  • the in-line test unit consists of a nondestructive testing facility with an upstream straightening machine, a stray flux test for longitudinal and transverse defects and an ultrasonic wall thickness test, and connects directly to the cooling bed (6) in conjunction with a repair cycle for pipes to be reworked.
  • the Ausziehwalzwerk (3) consists of 3 stands, each with three rollers to pull the mother tube from the roll bar.
  • FIG. 2 shows in comparison to the plant layout of the rolling mill according to the invention. In direct comparison, it can be seen that the plant concept according to the invention is characterized by a significantly reduced overall length.
  • the total length of the continuous rolling mill is significantly reduced by omitting the extracting mill (3) and the reheating furnace (4) and by length adjustment of the cooling bed (6) and saw field with pipe end machining (7).
  • the investment costs for the rolling mill according to the invention are correspondingly lower in comparison to the known continuous rolling mill.
  • the rolling mill is equipped with an in-line test unit, not shown here, which further reduces investment and operating costs.
  • the in-line test unit consists of a nondestructive testing facility with an upstream straightening machine, a stray flux test for longitudinal and transverse defects and an ultrasonic wall thickness test, and connects directly to the cooling bed (6) in conjunction with a repair cycle for pipes to be reworked.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)

Claims (4)

  1. Procédé de fabrication de tubes sans soudure, dans lequel un lingot creux chaud, préalablement produit dans un laminoir perceur, est étiré sur un mandrin au moyen d'un laminoir continu (2) pour obtenir une loupe et la loupe est amenée directement, sans passer par un laminoir étireur et un four de réchauffage, à un laminoir étireur-réducteur ou un laminoir calibreur (5) se présentant sous la forme d'un laminoir de finition où ladite loupe est laminée au diamètre de tube final requis, caractérisé en ce que
    le lingot creux est pré-dimensionné en longueur de façon à produire lors de l'étirage dans le laminoir continu (2) seulement une longueur unique d'environ 14 à 15 m comme longueur de loupe requise,
    lors du laminage de finition suivant le retrait de la loupe du mandrin est effectué par le laminage de finition et
    le laminage est effectué avec des composants de laminoir qui sont adaptés dimensionnellement à la manipulation de longueurs uniques,
    le laminage dans le laminoir continu (2) est effectué au moyen de trois cages et de trois cylindres par cage,
    la répartition de la réduction de section transversale du produit laminé entre le lingot creux et la loupe pour les trois cages du laminoir continu (2) est effectuée comme suit: cage 1 (cage d'admission du lingot creux): 50 à 60% cage 2 (cage intermédiaire): 35 à 40% cage 3 (cage de sortie): 5 à 7,5%
    et la réduction totale de l'épaisseur de paroi dans le laminoir continu (2) est limitée à ≤ 9 mm.
  2. Procédé selon la revendication 1, caractérisé en ce que le nombre N de diamètres de calibre, nécessaire au minimum à la production de différents diamètres de tube finaux, est calculé selon la formule suivante: N = arrondi à un nombre entier log D-tube max / D-tube-min / log C 1
    Figure imgb0045
     avec:
    D-tube-max: diamètre de tube final maximal en mm
    D-tube-min: diamètre de tube final minimal en mm
    2 ≤ C1 ≤ 4 pour les laminoirs étireurs-réducteurs
    1,2 ≤ C1 ≤ 1,45 pour les laminoirs calibreurs.
  3. Procédé selon la revendication 2, caractérisé en ce que lors de la production de 1 calibre, la gamme de diamètres de lingot est calculée selon la formule suivante:
    diamètre de lingot DB en mm: DB = D-tube-max × C 2 + C 3 / 1 + C 4
    Figure imgb0046
     avec: 1,04 ≤ C 2 ≤ 1,12
    Figure imgb0047
     22 ≤ C 3 ≤ 28
    Figure imgb0048
     − 0,03 ≤ C 4 ≤ 0,15
    Figure imgb0049
  4. Procédé selon revendication 3, caractérisé en ce que, lorsque plus d'un calibre est nécessaire, les autres gammes de diamètres de lingot sont calculées par l'équation suivante: DB = D-Tube-min × C 5 exp . Numéro de calibre n + C 3 ) / 1 + C 4
    Figure imgb0050
     avec: 1,4 ≤ C 5 ≤ 1,45
    Figure imgb0051
     22 ≤ C 3 ≤ 28
    Figure imgb0052
     − 0,03 ≤ C 4 ≤ 0,15
    Figure imgb0053
EP11785298.8A 2010-11-16 2011-09-19 Procédé de fabrication de tubes laminés à chaud sans soudure dans des laminoirs continus de tubes Not-in-force EP2640532B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010052084A DE102010052084B3 (de) 2010-11-16 2010-11-16 Verfahren zur wirtschaftlichen Herstellung von nahtlos warmgewalzten Rohren in Rohrkontiwalzwerken
PCT/DE2011/001782 WO2012065585A1 (fr) 2010-11-16 2011-09-19 Procédé de fabrication de tubes laminés à chaud sans soudure dans des laminoirs continus de tubes

Publications (2)

Publication Number Publication Date
EP2640532A1 EP2640532A1 (fr) 2013-09-25
EP2640532B1 true EP2640532B1 (fr) 2018-01-31

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Country Status (13)

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US (1) US9381554B2 (fr)
EP (1) EP2640532B1 (fr)
JP (1) JP2013544653A (fr)
KR (1) KR20130138810A (fr)
CN (1) CN103260778B (fr)
AR (1) AR083795A1 (fr)
BR (1) BR112013012135A2 (fr)
DE (1) DE102010052084B3 (fr)
MX (1) MX357113B (fr)
MY (1) MY168686A (fr)
UA (1) UA109461C2 (fr)
WO (1) WO2012065585A1 (fr)
ZA (1) ZA201303494B (fr)

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DE102012006941B4 (de) 2012-03-30 2013-10-17 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines Bauteils aus Stahl durch Warmumformen
JP6171834B2 (ja) * 2013-10-21 2017-08-02 Ｊｆｅスチール株式会社 厚肉鋼材製造用装置列
JP6171851B2 (ja) * 2013-10-29 2017-08-02 Ｊｆｅスチール株式会社 継目無鋼管製造用装置列およびそれを利用した油井用高強度ステンレス継目無鋼管の製造方法
ITUB20155314A1 (it) 2015-10-23 2017-04-23 Danieli Off Mecc Laminatoio multigabbia per corpi astiformi comprendente gabbie a tre rulli motorizzati
CN114669600B (zh) * 2022-05-13 2023-11-28 扬州市华生焊管设备有限公司 一种高精度钢管智能定径机

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DE102010052084B3 (de) 2012-02-16
AR083795A1 (es) 2013-03-20
JP2013544653A (ja) 2013-12-19
BR112013012135A2 (pt) 2016-09-27
EP2640532A1 (fr) 2013-09-25
MX2013005382A (es) 2013-07-29
MX357113B (es) 2018-06-27
KR20130138810A (ko) 2013-12-19
MY168686A (en) 2018-11-29
US9381554B2 (en) 2016-07-05
UA109461C2 (uk) 2015-08-25
CN103260778B (zh) 2016-05-18
ZA201303494B (en) 2014-01-29
CN103260778A (zh) 2013-08-21
WO2012065585A1 (fr) 2012-05-24
US20130333433A1 (en) 2013-12-19

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