EP0029786B1 - Procédé et dispositif pour la fabrication d'un tube d'acier sans soudure par laminage à chaud sur mandrin - Google Patents

Procédé et dispositif pour la fabrication d'un tube d'acier sans soudure par laminage à chaud sur mandrin Download PDF

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Publication number
EP0029786B1
EP0029786B1 EP80401672A EP80401672A EP0029786B1 EP 0029786 B1 EP0029786 B1 EP 0029786B1 EP 80401672 A EP80401672 A EP 80401672A EP 80401672 A EP80401672 A EP 80401672A EP 0029786 B1 EP0029786 B1 EP 0029786B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
tube
rolling mill
stands
reduction
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
Application number
EP80401672A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0029786A1 (fr
Inventor
Jacques Verdickt
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.)
Vallourec SA
Original Assignee
Vallourec SA
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 Vallourec SA filed Critical Vallourec SA
Priority to AT80401672T priority Critical patent/ATE4028T1/de
Publication of EP0029786A1 publication Critical patent/EP0029786A1/fr
Application granted granted Critical
Publication of EP0029786B1 publication Critical patent/EP0029786B1/fr
Expired 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
    • B21B17/02—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C45/00—Separating mandrels from work or vice versa

Definitions

  • the invention relates to the manufacture of a seamless steel tube by hot rolling on a mandrel.
  • the mandrel is then retracted upstream of the rolling mill for interleaving the next stool as soon as the blank which has just been laminated is released, it is not immune to a rupture of the mandrel or of the attachment device which has the consequence that a part of the shrouded tube passes through the extractor.
  • the extraction cages must exert a radial force such that it normally follows a slight reduction in diameter of the tube whose thickness is not altered. But, if a part of the tube comes to be presented with the mandrel still inside, the extraction rollers no longer working in the hollow have to exert such considerable forces that one arrives at rupture.
  • the succession of operations (braking and stopping of the mandrel tube, transfer in the axis of the chucker, chuck) is such that the blank cools and is no longer able to undergo a reduction in diameter without prior reheating, where an appreciable loss of energy.
  • the invention relates to a method for manufacturing a seamless steel tube, in which a tube blank fitted on a mandrel is hot rolled in a continuous rolling mill, the mandrel is subjected to a controlled speed during rolling, the mandrel tube and the mandrel is released at the end of the rolling so that it leaves the continuous rolling mill following the tube (FR-A-2 198797); it aims to avoid the above drawbacks.
  • the method of the invention is characterized by the characterizing part of claim 1.
  • This process makes it possible to obtain significant reductions in diameter and, optionally, in thickness of the tube, these latter being made possible by the very importance of the reduction in diameter, this in the axis of the continuous rolling mill a very small distance and without any handling of the product, so that the time which elapses between the passage of a considered section of product in the rolling mill and its passage in the reducer is very small and does not require intermediate reheating, hence a significant energy saving and a great simplification of the installation, the investment as well as the cost of operation and maintenance are reduced very substantially.
  • the mandrel is then sent to the cooling, possible control and recycling circuits towards the entrance to the rolling mill.
  • a device for implementing the method comprises a continuous rolling mill, means for accompanying the mandrel at a controlled speed during the rolling of the blank, reduction cages downstream of the continuous rolling mill and in line with it, means for supporting the mandrel during its passage through the reduction cages without contact with the cages and means for controlling the opening of the cages before the passage of the mandrel.
  • This device can be considered as the combination of a continuous rolling mill working on a long mandrel at a controlled speed during rolling and released at the end of rolling, with a particular reducing rolling mill.
  • the Figures relate to the rolling on a long mandrel and the reduction in the same hot, that is to say without intermediate reheating, of a thin tube obtained in a reproducible process with controlled mandrel retention.
  • thin tube is meant a tube in the range 100 x 4 (mm) to 250 x 7 (mm), the first and second values respectively designating the outside diameter and the thickness of the wall of the tube.
  • the installation essentially comprises (FIG. 1) a continuous rolling mill 1 and a reducing-extracting rolling mill 2 (to reduce the tube and separate it from the mandrel) in line with the continuous rolling mill.
  • the distance L between the last stand of the continuous rolling mill and the first stand of the reducer-extractor rolling mill, as small as possible, is of the order of a length of tube, or for example a distance of the order of 10 meters.
  • the two rolling mills are in synchronous speed, the output speed of the continuous rolling mill being for example 2 to 5 m / s, so that the time interval between rolling and reduction is generally less than one minute.
  • the numbers of stands of the rolling mills are chosen according to the needs, in a manner known per se.
  • Figures 2 and 3 show different embodiments of a cage of the extractor mill.
  • FIG. 2 illustrates a cage 4 of the type with two cylinders 8 and 9.
  • the four chocks 10 slide in openings made in the cage.
  • a double corner 11 and a similar part 12 respectively for the upper and lower part of the cage allow the cylinders 8 and 9 to be brought closer or apart under the action of jacks 13 and 14.
  • the close position corresponds to the reduction and to the subsequent mandrel, the position spread when the mandrel passes through the extractor mill.
  • break boxes 15 are interposed between the clamping screws 16 and the bearing face.
  • FIG. 3 shows a cage 4 of the three-cylinder type 17, 18, 19.
  • the cylinder bearings are housed in sliding chocks.
  • Three double sloping corners 21, 22, 23 allow the cylinders 17, 18, 19 to be brought closer or further apart respectively.
  • the close position corresponds to the reduction and mandrel operation which follows while the separated position corresponds to the passage of the mandrel in the extractor mill.
  • Three cylinders 24, 25, 26 provide the movements in question.
  • the graph in FIG. 4 makes it possible to compare the relative displacements of the mandrel and the blank E (which will become the tube T) during rolling and then reduction of the tube.
  • FR-A-2 198 797 describes a process for manufacturing a seamless metal tube, in a continuous rolling mill, on a mandrel.
  • the mandrel M is first retained so as to advance with a controlled speed, for example at constant speed, then it is released, when the rolling operation is finished, to exit the continuous rolling mill after the blank has become a T tube.
  • the extractor mill preferably comprises a high number of cages and, for example, at least five cages, as shown in Figure 1.
  • Figure 5 only the two end cages and the central cage of this are shown.
  • rolling mill for the convenience of the figure but it will be understood that it is indeed a rolling mill with five stands as in the case of Figure 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
EP80401672A 1979-11-21 1980-11-21 Procédé et dispositif pour la fabrication d'un tube d'acier sans soudure par laminage à chaud sur mandrin Expired EP0029786B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401672T ATE4028T1 (de) 1979-11-21 1980-11-21 Verfahren und vorrichtung zur herstellung eines nahtlosen stahlrohrs durch warmwalzen ueber eine dornstange.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7928700 1979-11-21
FR7928700A FR2469962A1 (fr) 1979-11-21 1979-11-21 Procede et dispositif pour la fabrication d'un tube d'acier sans soudure par laminage a chaud sur mandrin

Publications (2)

Publication Number Publication Date
EP0029786A1 EP0029786A1 (fr) 1981-06-03
EP0029786B1 true EP0029786B1 (fr) 1983-07-06

Family

ID=9231945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401672A Expired EP0029786B1 (fr) 1979-11-21 1980-11-21 Procédé et dispositif pour la fabrication d'un tube d'acier sans soudure par laminage à chaud sur mandrin

Country Status (8)

Country Link
US (1) US4375160A (pt)
EP (1) EP0029786B1 (pt)
JP (1) JPS56141902A (pt)
AT (1) ATE4028T1 (pt)
CA (1) CA1164251A (pt)
DE (1) DE3043679A1 (pt)
FR (1) FR2469962A1 (pt)
IT (2) IT8009597A1 (pt)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4684727A (en) * 1985-07-29 1987-08-04 Schering Corporation Zwitterionic 1,8-naphthyridine and pyrazino[2,3-b]pyridine containing compounds useful as anti-allergic, anti-inflammatory and cycloprotective agents
IT1238224B (it) * 1989-11-30 1993-07-12 Dalmine S R L C Processo perfezionato di laminazione a caldo di tubi senza saldatura con preventiva riduzione degli sbozzati forati
US5407494A (en) * 1993-12-21 1995-04-18 Crs Holdings, Inc. Method of fabricating a welded metallic duct assembly
EP1170068B1 (en) * 2000-07-04 2005-10-19 Kusakabe Electric & Machinery Co., Ltd. Three-roll-type reducing mill for electro-resistance-welded tube
US20080061555A1 (en) * 2005-02-16 2008-03-13 Colin Knight Flared cone fitting
DE102007034895A1 (de) * 2007-07-24 2009-01-29 V&M Deutschland Gmbh Verfahren zur Herstellung von warmgefertigten nahtlosen Rohren mit optimierten Ermüdungseigenschaften im verschweißten Zustand
CN101468359B (zh) * 2007-12-25 2012-02-08 无锡西姆莱斯石油专用管制造有限公司 一种利于降低轧辊、芯棒消耗的五机架限动芯棒连轧机
US20110017339A1 (en) * 2009-07-23 2011-01-27 Chakravarti Management, Llc Method for rolled seamless clad pipes
US20110017807A1 (en) * 2009-07-23 2011-01-27 Chakravarti Management, Llc Method for rolled seamless clad pipes
BR112012006211A2 (pt) * 2009-09-30 2016-05-31 Sumitomo Metal Ind laminador sobre mandril retrátil e método para laminação de bloco bruto de tubo
ITMI20110372A1 (it) * 2011-03-10 2012-09-11 Danieli Off Mecc Processo di laminazione per tubi in laminatoio continuo multigabbia
CN110883095B (zh) * 2019-11-19 2020-08-28 燕山大学 大型异型管材微铸轧增材制造的辊压成型装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE348267A (pt) *
FR419568A (fr) * 1910-08-20 1911-01-10 Escaut Et Meuse D Dispositif de démandrinage pour laminoirs de corps creux
US2356734A (en) * 1941-08-14 1944-08-29 Nat Tube Co Tube mill
BE572056A (pt) * 1957-11-02
FR2198797B1 (pt) * 1972-09-08 1975-01-03 Vallourec
DE2732342A1 (de) * 1977-07-16 1979-01-25 Hiss Eckart Dornerfassungsanordnung fuer rohre
IT1115716B (it) * 1977-03-16 1986-02-03 Innocenti Santeustacchio Spa Apparecchiatura di estrazione per laminatoi continui operanti con mandrino trattenuto
DE2811801A1 (de) * 1978-03-15 1979-09-20 Mannesmann Ag Verfahren und anlage zum warmwalzen nahtloser rohre

Also Published As

Publication number Publication date
CA1164251A (en) 1984-03-27
JPS56141902A (en) 1981-11-05
EP0029786A1 (fr) 1981-06-03
DE3043679A1 (de) 1981-06-04
US4375160A (en) 1983-03-01
FR2469962A1 (fr) 1981-05-29
DE3043679C2 (pt) 1989-04-06
IT8009597A1 (it) 1982-05-19
IT8009597A0 (it) 1980-11-19
IT1154896B (it) 1987-01-21
ATE4028T1 (de) 1983-07-15
JPS6111682B2 (pt) 1986-04-04
FR2469962B1 (pt) 1983-11-04

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