EP0854762A2 - Contour des cannelures des cylindres d'un laminoir a tuyaux - Google Patents

Contour des cannelures des cylindres d'un laminoir a tuyaux

Info

Publication number
EP0854762A2
EP0854762A2 EP96943860A EP96943860A EP0854762A2 EP 0854762 A2 EP0854762 A2 EP 0854762A2 EP 96943860 A EP96943860 A EP 96943860A EP 96943860 A EP96943860 A EP 96943860A EP 0854762 A2 EP0854762 A2 EP 0854762A2
Authority
EP
European Patent Office
Prior art keywords
caliber
contour
diameter
roller
calibre
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.)
Granted
Application number
EP96943860A
Other languages
German (de)
English (en)
Other versions
EP0854762B1 (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
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 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

Links

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 rolls of a reducing mill with three-roll stands, in particular for rolling thick-walled tubes with a wall thickness / diameter ratio of more than 0.25.
  • Caliber machining technology creates a contact surface with 3 tips, namely in the caliber base and at the caliber jumps. This is shown on page 1052, Figure 11 of the publication mentioned.
  • the peaks in the contact area between the roll and the rolling stock in turn lead to internal roundness on the pipe and thus have a significantly negative effect on the quality.
  • the friction is increased so that the rollers wear more.
  • the present invention is based on the object of improving the caliber contour of the essentially circularly calibrated rollers according to the prior art that undesired peaks in the contact surface between the rolling stock and the roll are avoided or at least flattened.
  • the roll contour of each roll has a diameter widening in the region of the caliber base, in which the material region rolled in the roll jump of the caliber upstream in each case in the rolling direction can be deformed.
  • the caliber diameter in the caliber base area By deliberately increasing the caliber diameter in the caliber base area, it is possible to shorten the contact length in the caliber base, so that a uniform contact surface is achieved. In this way, the tube is no longer exposed to excessive tension in the area of the caliber base, since the tips which are clearly recognizable in the prior art are largely flattened. It is particularly expedient if the diameter expansion starting from the caliber diameter is approximately 0.5% to 1.0% of the caliber diameter and extends on both sides of the caliber base center to a circumferential angle of approximately 10 ° to 15 °. With these dimensions, good tube results have been seen, ie an almost right-angled contact surface between the roll and the rolling stock.
  • a diameter widening in the area of the caliber jump in addition to the diameter widening in the caliber base of the roller.
  • This diameter expansion can e.g. can be achieved by increasing the transition radius at the edge of the roller to 3 mm to 5 mm. It has been shown that such radii, which are less than 3 mm in the prior art, also significantly improve the deformation ratios in the caliber and the contact tips can also be significantly reduced in the edge region of the caliber of a roller.
  • Figure 1 is a front view of a partially cut inventive
  • Figure 2 shows the projection of the contact surface between the tube and the invention
  • FIG. 1 denotes one of three caliber rollers according to the invention, which build up the entire caliber, and which rotates about the axis of rotation 2.
  • the pipe to be rolled is schematically indicated at 3.
  • the essentially circular caliber 4 of the roller 1 has a diameter widening in the region of the caliber base at 5, that is to say a deepening of the caliber base.
  • diameter expansions are provided in the area of the caliber jump at 6, in the form of radius enlargements at the edge of the caliber roller 2.
  • the conventional caliber shape is shown in dashed lines at 7 in FIG. 1 for better understanding.
  • This conventional caliber shape is shown in FIG. 2, which represents the projection of the contact surface between tube 3 and roller 1, also drawn.
  • contact tips are clearly visible at 8 in the area of the caliber base 9 of the caliber roller 1 and in the area of the caliber jump 10 on both edge sides of the roller 2. These tips 8 and 10 arise on the inlet side of the roller 2 and lead to the described inner non-circular formation on the finished one Tube 3.

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.
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 true EP0854762A2 (fr) 1998-07-29
EP0854762B1 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9713595A2 *

Also Published As

Publication number Publication date
JP4012570B2 (ja) 2007-11-21
CN1068804C (zh) 2001-07-25
DE19539408C2 (de) 2003-03-20
EP0854762B1 (fr) 2000-04-26
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
AR003823A1 (es) 1998-09-09

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