EP0809545B1 - Systeme de calibrage de cylindres pour laminoir a retreindre les tubes - Google Patents

Systeme de calibrage de cylindres pour laminoir a retreindre les tubes Download PDF

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Publication number
EP0809545B1
EP0809545B1 EP96901717A EP96901717A EP0809545B1 EP 0809545 B1 EP0809545 B1 EP 0809545B1 EP 96901717 A EP96901717 A EP 96901717A EP 96901717 A EP96901717 A EP 96901717A EP 0809545 B1 EP0809545 B1 EP 0809545B1
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
pipe
design system
roll pass
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.)
Expired - Lifetime
Application number
EP96901717A
Other languages
German (de)
English (en)
Other versions
EP0809545A1 (fr
Inventor
Hans-Joachim Pehle
Peter Thieven
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0809545A1 publication Critical patent/EP0809545A1/fr
Application granted granted Critical
Publication of EP0809545B1 publication Critical patent/EP0809545B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills

Definitions

  • the invention relates to a roll calibration for each of three rolls existing roll sets of a multi-stand mandrel-less tube reducing mill, where the concave caliber contours of the rollers on both caliber flanks each Roller are convexly convex.
  • corner or polygon formation In pipe reducing rolling mills, especially stretch reducing rolling mills, which without Internal tool, there is an appearance resulting from the rolling process, which is referred to as corner or polygon formation.
  • the inside diameter of the pipe has a shape deviating from the circular cross-section, which can be seen in Using two roller calibers as square and when using one Three-roll caliber as a hexagonal cross-sectional shape with rounded edges can describe.
  • German patent step 24 48 158 A reasonable proposal in this context is described in German patent step 24 48 158.
  • the known prior art proposes to approximate the deformation ratios of a roller set formed from three rollers to the deformation ratios of a roller set formed from six rollers.
  • the caliber contours of the rolls are bulged on the roll flanks.
  • the proposal of the prior art known from DE 24 48 158 did not take into account that the proposed caliber shape alone is not suitable for homogenizing the state of deformation.
  • the aim of the present invention is based on the German patent specification 2448 158 and based on the caliber shape proposed there, the Improve roll calibration for a pipe reducing mill so that the Material flow in the pipe is influenced locally so that a lower local Pipe wall thickening when reducing at critical points along the Pipe circumference takes place and thereby thickened on the finished pipe Places to be avoided.
  • the invention proposes that at known caliber contour training the size of the bulge of the caliber flanks in Direction of rolling of successive sets of rolls by constant or percentage equal Amounts increases.
  • This proposal is based on the knowledge that the known one Bulging on the material flow has no effect, if not in each frame Number of successive work scaffolds due to the bulging more Reduction in the caliber flank takes place than in the caliber base or caliber jump.
  • the height of the protrusion from frame to frame in the Caliber series can be increased.
  • the proposal of the invention results in an advantage. that the local bulge increases the local contact pressure in each scaffold, so that a material thickening in the middle of the caliber flank is counteracted.
  • the finished pipe is in the event of a polygon formation, so without using the Invention, this point in the wall thickness compared to the rest of the tube circumference enlarged.
  • the proposed measures of the invention act on this thickening opposite.
  • the increase in Bulge 1 to 5% of the tube wall thickness of the tubes to be rolled in the caliber corresponds.
  • the apex is proposed the bulging of each caliber flank, based on the caliber base in relation to the Caliber center point of the roller set by 30 to 35 degrees in the direction of the roller jump to be moved. This measure prevents the material flow due to a bulge positioned in the middle or towards the base of the caliber is directed towards the caliber jump and there to undesirable local Wall thickening leads. If the apex of the bulge after the Proposals of the invention is moved in the direction of the caliber jump, that is If the bulge is arranged asymmetrically in the caliber flank, this becomes disruptive Effect balanced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Control Of Metal Rolling (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (4)

  1. Calibrage de cylindres pour les jeux de cylindres, constitués à chaque fois de trois cylindres, d'un laminoir réducteur de tubes sans mandrin à plusieurs cages, dans lequel les contours concaves des calibres des cylindres sont précintrés de façon convexe sur les deux flancs de calibre de chaque cylindre,
    caractérisé en ce que la valeur (a) du précintrage (5) des flancs de calibre (4) de plusieurs jeux de cylindres successifs dans la direction de laminage augmente de valeurs constantes ou identiques en pourcentage.
  2. Calibrage de cylindres selon la revendication 1,
    caractérisé en ce que l'augmentation du précintrage (5) correspond à de 1 à 5% de l'épaisseur de paroi des tubes à laminer dans le calibre.
  3. Calibrage de cylindres selon les revendications 1 et 2,
    caractérisé en ce que le sommet (6) des précintrages (5) de chaque flanc de calibre (4), à partir du fond de calibre (3) et relativement au centre de calibre (7) du jeu de cylindres, est agencé de façon décalée de 30 à 35 degrés en direction du saut de cylindre (8).
  4. Calibrage de cylindres selon les revendications 1 à 3,
    caractérisé en ce que, des cages de travail (i à i + n) suivant les cages ébaucheuses, un nombre lié d'au maximum 12 cages est muni des précintrages (5) des flancs de calibre (4).
EP96901717A 1995-02-14 1996-02-02 Systeme de calibrage de cylindres pour laminoir a retreindre les tubes Expired - Lifetime EP0809545B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19506858A DE19506858C1 (de) 1995-02-14 1995-02-14 Walzenkalibrierung für ein Rohrreduzierwalzwerk
DE19506858 1995-02-14
PCT/DE1996/000205 WO1996025249A1 (fr) 1995-02-14 1996-02-02 Systeme de calibrage de cylindres pour laminoir a retreindre les tubes

Publications (2)

Publication Number Publication Date
EP0809545A1 EP0809545A1 (fr) 1997-12-03
EP0809545B1 true EP0809545B1 (fr) 1999-04-14

Family

ID=7755188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96901717A Expired - Lifetime EP0809545B1 (fr) 1995-02-14 1996-02-02 Systeme de calibrage de cylindres pour laminoir a retreindre les tubes

Country Status (10)

Country Link
US (1) US5816092A (fr)
EP (1) EP0809545B1 (fr)
CN (1) CN1070394C (fr)
AT (1) ATE178816T1 (fr)
CZ (1) CZ286696B6 (fr)
DE (2) DE19506858C1 (fr)
ES (1) ES2129953T3 (fr)
RU (1) RU2117540C1 (fr)
UA (1) UA45991C2 (fr)
WO (1) WO1996025249A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19758107A1 (de) * 1997-12-17 1999-06-24 Mannesmann Ag Mehrgerüstiges dornloses Streckreduzierwalzwerk
CN100534653C (zh) * 2004-01-21 2009-09-02 住友金属工业株式会社 管的减径轧制装置及减径轧制装置用轧辊
JP4650747B2 (ja) * 2004-03-29 2011-03-16 住友金属工業株式会社 管の製造方法及び定径圧延装置
CN1695839B (zh) * 2004-08-17 2010-07-07 江苏包罗铜材集团股份有限公司 铸锭冷穿、冷扩孔的三辊斜轧方法
RU2270066C1 (ru) * 2004-08-19 2006-02-20 Станислав Александрович Баранов Технологический калибрующий инструмент
RU2288060C2 (ru) * 2004-08-25 2006-11-27 ОАО "Челябинский трубопрокатный завод" Способ подготовки и калибровки валков пилигримовых станов
JP4441912B2 (ja) * 2005-03-28 2010-03-31 住友金属工業株式会社 マンドレルミル圧延方法
BRPI0810055B1 (pt) * 2007-02-08 2016-10-18 Nippon Steel & Sumitomo Metal Corp rolo raiado para um redutor e redutor
RU2398642C2 (ru) * 2008-08-05 2010-09-10 Александр Михайлович Лютов Технологический калибрующий инструмент
AT507596B1 (de) * 2008-11-20 2011-04-15 Voestalpine Tubulars Gmbh & Co Kg Verfahren und vorrichtung zur herstellung von stahlrohren mit besonderen eigenschaften
JP5849895B2 (ja) * 2012-08-21 2016-02-03 新日鐵住金株式会社 絞り圧延装置及び絞り圧延装置用ロール
CN104550263B (zh) * 2014-12-18 2017-05-10 天津商业大学 一种利用五机架连轧机生产无缝钢管的孔型设计方法
CN112007951B (zh) * 2019-05-31 2022-08-16 宝山钢铁股份有限公司 高频直缝焊管的精成型圆管孔型的成型方法
CN113996663B (zh) * 2021-12-31 2022-03-11 太原科技大学 无缝管张力减径工艺减径率分配修正方法及系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE342403C (de) * 1919-09-06 1921-10-18 Verfahren der Herstellung von ungebrannten Baustoffen
DE2333916C2 (de) * 1973-07-04 1986-01-09 Kocks Technik Gmbh & Co, 4010 Hilden Kalibrierung der Walzen einer Reduzierwalzstraße für Rohre
DE2448158C3 (de) * 1974-10-07 1980-09-04 Mannesmannroehren-Werke Ag, 4000 Duesseldorf Auf die Verringerung der Polygonbildung im Rohrinneren ausgerichtete Walzenkalibrierung eines Rohrreduzierwalzwerkes
IT1078828B (it) * 1975-06-25 1985-05-08 Mannesmann Roehren Werke Ag Calibratura di un laminatoio riduttore a tre cilindri per evitare la formazione di poligoni nell interno dei tubi in occasione della laminazione riduttrice dei tubi
DE2753267C3 (de) * 1977-11-30 1980-09-18 Kocks Technik Gmbh & Co, 4000 Duesseldorf Stoßbank zum Herstellen von Rohrluppen
SU1183211A1 (ru) * 1982-06-11 1985-10-07 Uralsky Nii Trubnoj Promy Технологический инструмент редукционного стана
SU1071335A1 (ru) * 1982-11-03 1984-02-07 Уральский научно-исследовательский институт трубной промышленности Технологический инструмент редукционного стана

Also Published As

Publication number Publication date
CN1174527A (zh) 1998-02-25
DE19506858C1 (de) 1996-01-18
ES2129953T3 (es) 1999-06-16
CZ244797A3 (en) 1997-11-12
WO1996025249A1 (fr) 1996-08-22
US5816092A (en) 1998-10-06
CN1070394C (zh) 2001-09-05
UA45991C2 (uk) 2002-05-15
RU2117540C1 (ru) 1998-08-20
EP0809545A1 (fr) 1997-12-03
ATE178816T1 (de) 1999-04-15
CZ286696B6 (en) 2000-06-14
DE59601666D1 (de) 1999-05-20

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