EP0854762B1 - Contour des cannelures des cylindres d'un laminoir a tuyaux - Google Patents

Contour des cannelures des cylindres d'un laminoir a tuyaux Download PDF

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Publication number
EP0854762B1
EP0854762B1 EP96943860A EP96943860A EP0854762B1 EP 0854762 B1 EP0854762 B1 EP 0854762B1 EP 96943860 A EP96943860 A EP 96943860A EP 96943860 A EP96943860 A EP 96943860A EP 0854762 B1 EP0854762 B1 EP 0854762B1
Authority
EP
European Patent Office
Prior art keywords
caliber
roll
diameter
contour
groove
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
EP96943860A
Other languages
German (de)
English (en)
Other versions
EP0854762A2 (fr
Inventor
Peter Thieven
Winfried Braun
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 EP0854762A2 publication Critical patent/EP0854762A2/fr
Application granted granted Critical
Publication of EP0854762B1 publication Critical patent/EP0854762B1/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 the caliber contour of the essentially circularly calibrated Rolling a reduction rolling mill with three-roll stands, in particular for rolling thick-walled pipes with a wall thickness-diameter ratio of more than 0.25.
  • prior-art reducing rolling mills are used for rolling thin-walled pipes usually not circular, but formed by 3 arches elliptical-like caliber shapes applied, the short semiaxes in the base of the caliber lie.
  • the long semi-axis lies in the caliber jump and is larger than the short one Semi-axis of the previous caliber. This is an attempt to prevent the Avoid rolling material in the roll gap and thus roll gap markings.
  • caliber shapes reach their limits when pipes are used Wall thickness ratios over 0.1 are rolled. Then the so-called occurs Polygon formation on, a deviation of the inner contour of the tube from the desired circular shape. In extreme cases, this polygon formation can almost become a hexagonal inner cross-section, which strongly influences the usability of the pipe restricted.
  • the present invention has the task based on the caliber contour of the essentially circularly calibrated rolls to improve the prior art so that unwanted peaks in the Avoid contact area between rolling stock and roll or at least flattened become.
  • the invention proposes that the roller contour each roller has an enlarged diameter in the area of the caliber base, in the one rolled in the roll jump of the upstream caliber in each case in the rolling direction Material area is deformable.
  • the diameter widening from the caliber diameter starting from about 0.5% to 1.0% of the caliber diameter and on both sides the center of the caliber extends to a circumferential angle of approximately 10 ° to 15 °. At These dimensions have shown good tube results, d. H. a almost right-angled contact surface between roller and rolling stock.
  • a diameter expansion in Range of the caliber jump In a measure improving the invention, it is provided in addition to Diameter expansion in the caliber base of the roller a diameter expansion in Range of the caliber jump.
  • This diameter expansion can e.g. by increasing the transition radius at the edge of the roller to 3 mm to 5 mm can be achieved. It has been shown that with such radii at the state of Technology is less than 3 mm, also significant improvements in Deformation ratios can be achieved in the caliber and the contact tips in the Edge area of the caliber of a roller can be significantly reduced.
  • FIG. 1 is one of three according to the invention building up the entire caliber Designated caliber rolls, which rotates about the axis of rotation 2. That too rolling tube is indicated schematically at 3.
  • the essentially circular Caliber 4 of the roller 1 has a 5 in the area of the caliber base Expansion of the diameter, i.e. a deepening of the caliber base. Further According to the invention, diameter expansions are in the area of the caliber jump 6 provided, namely in the form of radius increases at the edge of the Caliber roller 2.
  • dashed at 7 for better understanding the conventional caliber shape is drawn.
  • This conventional caliber shape is in FIG. 2, which represents the projection of the contact surface between tube 3 and roller 1, also drawn.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un contour des cannelures des cylindres de calibrage sensiblement circulaire d'un laminoir réducteur doté d'une cage trio, notamment pour le laminage de tuyaux à paroi épaisse dont le rapport épaisseur/diamètre est supérieur à 0,25. Selon l'invention, le contour des cannelures de chaque cylindre (1) présente une augmentation de diamètre (5) dans la zone de la base de cannelure, dans laquelle la zone de matériau laminé est déformable dans la pointe de cannelure située en amont dans le sens de laminage.

Claims (3)

  1. Contour de calibre des cylindres calibrés de façon généralement circulaire d'un laminoir réducteur comportant des cages à trois cylindres, en particulier pour le laminage de tubes à paroi épaisse ayant un rapport épaisseur de paroi/diamètre supérieur à 0,25,
    caractérisé en ce que le contour de calibre de chaque cylindre (1) présente, dans la zone du fond de calibre, un élargissement de diamètre (5) dans lequel la zone de matière laminée dans le saut de cylindre du calibre prévu à chaque fois en amont dans la direction de laminage peut être déformée.
  2. Contour de calibre selon la revendication 1,
    caractérisé en ce que l'élargissement de diamètre (5), à partir du diamètre du calibre, vaut environ 0,5% à 1,0% du diamètre du calibre et s'étend, des deux côtés du centre du fond de calibre, sur un angle périphérique d'environ 10° à 15°.
  3. Contour de calibre selon les revendications 1 et 2,
    caractérisé en ce que, de façon supplémentaire à l'élargissement de diamètre (5) dans le fond de calibre du cylindre (1), il est prévu un élargissement de diamètre (6) dans la zone du saut de calibre.
EP96943860A 1995-10-11 1996-09-27 Contour des cannelures des cylindres d'un laminoir a tuyaux Expired - Lifetime EP0854762B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19539408A DE19539408C2 (de) 1995-10-11 1995-10-11 Kaliberkontur der Walze eines Rohrwalzwerkes
DE19539408 1995-10-11
PCT/DE1996/001881 WO1997013595A2 (fr) 1995-10-11 1996-09-27 Contour des cannelures des cylindres d'un laminoir a tuyaux

Publications (2)

Publication Number Publication Date
EP0854762A2 EP0854762A2 (fr) 1998-07-29
EP0854762B1 true EP0854762B1 (fr) 2000-04-26

Family

ID=7775534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96943860A Expired - Lifetime EP0854762B1 (fr) 1995-10-11 1996-09-27 Contour des cannelures des cylindres d'un laminoir a tuyaux

Country Status (10)

Country Link
US (1) US6065320A (fr)
EP (1) EP0854762B1 (fr)
JP (1) JP4012570B2 (fr)
CN (1) CN1068804C (fr)
AR (1) AR003823A1 (fr)
DE (2) DE19539408C2 (fr)
PL (1) PL180718B1 (fr)
RU (1) RU2138347C1 (fr)
TW (1) TW314480B (fr)
WO (1) WO1997013595A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP5003833B1 (ja) * 2011-03-31 2012-08-15 住友金属工業株式会社 絞り圧延用ロールの製造方法、及び、絞り圧延用ロール
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
RU2530591C2 (ru) * 2013-01-16 2014-10-10 Открытое акционерное общество "Российский научно-исследовательский институт трубной промышленности" (ОАО "РосНИТИ") Калибр трубопрокатного стана
CN105363782A (zh) * 2015-11-30 2016-03-02 太原科技大学 张力减径机工作机组轧辊孔型
EA031598B1 (ru) * 2016-08-29 2019-01-31 Публичное акционерное общество "Трубная металлургическая компания" (ПАО "ТМК") Калибр трехвалкового трубопрокатного стана

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
JP4012570B2 (ja) 2007-11-21
CN1068804C (zh) 2001-07-25
DE19539408C2 (de) 2003-03-20
WO1997013595A2 (fr) 1997-04-17
RU2138347C1 (ru) 1999-09-27
WO1997013595A3 (fr) 1997-07-17
CN1199355A (zh) 1998-11-18
TW314480B (fr) 1997-09-01
DE59605068D1 (de) 2000-05-31
PL180718B1 (pl) 2001-03-30
US6065320A (en) 2000-05-23
DE19539408A1 (de) 1997-04-17
JPH11513312A (ja) 1999-11-16
PL326154A1 (en) 1998-08-31
EP0854762A2 (fr) 1998-07-29
AR003823A1 (es) 1998-09-09

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