EP1109634B1 - Verfahren zur minimierung verdickter enden beim walzen von rohren in einem streckreduzierwalzwerk - Google Patents

Verfahren zur minimierung verdickter enden beim walzen von rohren in einem streckreduzierwalzwerk Download PDF

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Publication number
EP1109634B1
EP1109634B1 EP99936250A EP99936250A EP1109634B1 EP 1109634 B1 EP1109634 B1 EP 1109634B1 EP 99936250 A EP99936250 A EP 99936250A EP 99936250 A EP99936250 A EP 99936250A EP 1109634 B1 EP1109634 B1 EP 1109634B1
Authority
EP
European Patent Office
Prior art keywords
pipe
reducing mill
rolling
steady
state
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
EP99936250A
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German (de)
English (en)
French (fr)
Other versions
EP1109634A1 (de
Inventor
Hans Joachim Pehle
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1109634A1 publication Critical patent/EP1109634A1/de
Application granted granted Critical
Publication of EP1109634B1 publication Critical patent/EP1109634B1/de
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
    • 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
    • B21B17/14—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 method for minimizing thickened ends during rolling of pipes in a stretch-reducing mill by changing the time Torque of individual driven roll stands when passing through the Pipe beginning or the end of the pipe through the stretch-reducing mill, so that the Pipe ends with larger than the stationary ratios of the roll speed be rolled.
  • the difference is a measure of the size of the increase in wall thickness at the pipe ends between those acting in the stationary and those in the transient state
  • Tensile stresses in every single forming step, i.e. in every scaffold. by virtue of the development of the wall thickness differs in different processes the - in the rolling direction - the front and the rear pipe section; she exist essentially in the wall thickness, the wall thickness profile and the length of the area with increased wall thickness.
  • the thickened pipe ends outside the tolerance are cut off means committee that can significantly reduce productivity. So it had to Methods are developed with which the formation of the thickened pipe ends could be prevented or at least minimized so that the end losses so stayed as small as possible.
  • the object of the present invention is the effect of the known Pipe end control increase and localize to thicken the occurrence To further minimize or prevent pipe ends.
  • an improvement of the known is inventively Proposed method, which is characterized in that between the stationary and increased speed ratios smaller than the stationary Speed ratios can be set.
  • the proposal of the invention due to the reduced speed ratios compared to the stationary rolling condition a targeted wall thickening is set, i.e. on the one hand it becomes the Tension increase localized and better at the area of wall thickening adjusted and on the other hand a possible impermissible wall thinning in the area balanced between the thickened pipe end and the good pipe.
  • Speed change method according to the invention can be impermissible Wall thinning avoided and thus even higher speed ratios can be set so that a shortening of the thickened ends can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP99936250A 1998-08-31 1999-05-11 Verfahren zur minimierung verdickter enden beim walzen von rohren in einem streckreduzierwalzwerk Expired - Lifetime EP1109634B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19840864 1998-08-31
DE19840864A DE19840864C1 (de) 1998-08-31 1998-08-31 Verfahren zur Minimierung verdickter Enden beim Walzen von Rohren in einem Streckreduzierwalzwerk
PCT/DE1999/001459 WO2000012237A1 (de) 1998-08-31 1999-05-11 Verfahren zur minimierung verdickter enden beim walzen von rohren in einem streckreduzierwalzwerk

Publications (2)

Publication Number Publication Date
EP1109634A1 EP1109634A1 (de) 2001-06-27
EP1109634B1 true EP1109634B1 (de) 2002-11-27

Family

ID=7880141

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99936250A Expired - Lifetime EP1109634B1 (de) 1998-08-31 1999-05-11 Verfahren zur minimierung verdickter enden beim walzen von rohren in einem streckreduzierwalzwerk

Country Status (12)

Country Link
US (1) US6526792B1 (cs)
EP (1) EP1109634B1 (cs)
JP (1) JP3794923B2 (cs)
CN (1) CN1144630C (cs)
AT (1) ATE228400T1 (cs)
AU (1) AU5147599A (cs)
CZ (1) CZ300083B6 (cs)
DE (1) DE19840864C1 (cs)
ES (1) ES2183589T3 (cs)
RU (1) RU2224607C2 (cs)
UA (1) UA67792C2 (cs)
WO (1) WO2000012237A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10332221A1 (de) * 2003-07-16 2005-02-17 Benteler Stahl/Rohr Gmbh Verfahren zur Minimierung verdickter Enden beim Auswalzen von Walzprodukten

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100455369C (zh) * 2005-06-30 2009-01-28 宝山钢铁股份有限公司 张减机壁厚前馈控制方法
DE102017220750A1 (de) 2017-11-21 2019-05-23 Sms Group Gmbh Vorrichtung zur Steuerung eines Streckreduzierwalzwerks
CN108555033B (zh) * 2018-04-09 2019-11-12 北京科技大学 一种张力减径机轧制时钢管增厚段长度极小化的控制方法
CN109047335A (zh) * 2018-06-11 2018-12-21 黑龙江建龙化工有限公司 钢管尺寸外径控制方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1652543A1 (de) * 1968-03-02 1972-02-03 Demag Ag Streckreduzierwalzwerk
US4002048A (en) * 1975-12-19 1977-01-11 Aetna-Standard Engineering Company Method of stretch reducing of tubular stock
DE3028211C2 (de) * 1980-07-25 1986-10-16 Kocks Technik Gmbh & Co, 4010 Hilden Walzstraße zum Streckreduzieren von Rohren
DE3601693A1 (de) * 1986-01-17 1987-07-23 Mannesmann Ag Walzstrasse zum streckreduzieren von rohren
US4984444A (en) * 1989-04-26 1991-01-15 Franceschina Louis E Method of reducing tubular products
IT1237199B (it) * 1989-11-17 1993-05-26 Ettore Cernuschi Laminatoio riduttore a stiramento per tubi.
RU2015755C1 (ru) * 1991-05-23 1994-07-15 Всероссийский научно-исследовательский, проектно-конструкторский и технологический институт кабельной промышленности Способ холодного редуцирования сварных трубных изделий
JP3316979B2 (ja) * 1992-11-30 2002-08-19 住友金属工業株式会社 管の圧延方法及びその実施に使用する装置
RU2041750C1 (ru) * 1993-08-17 1995-08-20 Товарищество с ограниченной ответственностью фирма "Виго-ЛТД" Способ регулирования толщины стенки труб
DE4446659C1 (de) * 1994-12-16 1996-07-25 Mannesmann Ag Arbeitsverfahren zur Herstellung von Rohren in einem Streckreduzierwalzwerk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10332221A1 (de) * 2003-07-16 2005-02-17 Benteler Stahl/Rohr Gmbh Verfahren zur Minimierung verdickter Enden beim Auswalzen von Walzprodukten
DE10332221B4 (de) * 2003-07-16 2006-05-11 Benteler Stahl/Rohr Gmbh Verfahren zur Minimierung verdickter Enden beim Auswalzen von Walzprodukten

Also Published As

Publication number Publication date
AU5147599A (en) 2000-03-21
ES2183589T3 (es) 2003-03-16
US6526792B1 (en) 2003-03-04
ATE228400T1 (de) 2002-12-15
UA67792C2 (uk) 2004-07-15
DE19840864C1 (de) 1999-07-29
JP2002523243A (ja) 2002-07-30
CN1315887A (zh) 2001-10-03
CZ300083B6 (cs) 2009-01-28
WO2000012237A1 (de) 2000-03-09
CZ2001754A3 (cs) 2001-09-12
JP3794923B2 (ja) 2006-07-12
EP1109634A1 (de) 2001-06-27
RU2224607C2 (ru) 2004-02-27
CN1144630C (zh) 2004-04-07

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