EP2919926A1 - Procédé et dispositif de fabrication de tubes d'acier sans soudure a faible excentricite - Google Patents

Procédé et dispositif de fabrication de tubes d'acier sans soudure a faible excentricite

Info

Publication number
EP2919926A1
EP2919926A1 EP13818650.7A EP13818650A EP2919926A1 EP 2919926 A1 EP2919926 A1 EP 2919926A1 EP 13818650 A EP13818650 A EP 13818650A EP 2919926 A1 EP2919926 A1 EP 2919926A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
rolling
longitudinal axis
rolling stock
rotational movement
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.)
Ceased
Application number
EP13818650.7A
Other languages
German (de)
English (en)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2919926A1 publication Critical patent/EP2919926A1/fr
Ceased 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
    • B21B17/02—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
    • B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels

Definitions

  • the invention relates to a method for producing seamless steel tubes according to the preamble of claim 1.
  • Seamless steel tubes are produced on different rolling mills. Most of such mills have in common that three forming steps are passed in succession.
  • the heated rolling stock (1) for example a continuously cast steel block, is perforated with a solid cross-section
  • the hollow block produced in the cross rolling mill is in a second forming stage using an internal tool, a rolling rod, in a longitudinal or
  • the tube is then usually rolled finished without an inner tool, wherein diameter and
  • Diameter and wall thickness of the finished rolled tube must meet specified specifications, ie they must be within specified tolerances. If tolerances are not met, the product, the tube, inferior and the economic yield is low. For reasons of stability of the rolled tubes for later use in cables, components and construction elements usually negative tolerances in terms of wall thickness are required, ie the wall thickness must not fall below a specified value (minus tolerance) at any point of the tube. In order to safely comply with negative tolerances, pipes with greater wall thickness are often produced. However, this means an additional expenditure of material, so that increased
  • Wall thickness deviations ie deviations of the actual values of the wall thickness from the specified nominal values. Wall thickness deviations differ due to different development mechanisms in their expression and size.
  • a particularly large proportion of the wall thickness deviations of the finished rolled tube has the eccentricity (see Fig. 3).
  • the eccentricity is shown as a wall thickness profile in the cross section of the tube with a maximum value t m ax and a minimum value lying in cross-section t m in. The value of the eccentricity is in the
  • the eccentricity arises mainly in the first forming stage and can be reduced only slightly in the two other forming stages. It is therefore particularly important for economic reasons, the formation of eccentricity in the first forming stage, the punching by means of oblique rolling, to a minimum
  • Rolling stock axis shifts. This shift from the centric position is done by radially acting forces, which may have different causes. Causes can be: An uneven distribution of the temperature or the material properties
  • the problem of eccentricity is limited by the fact that the mentioned influences are kept as small as possible. Accordingly, it is ensured, for example, that the block is heated uniformly before the perforation, the rolling mill and the auxiliary equipment are exactly aligned with each other, and worn piercer spikes in time
  • a rolling mill for punching blocks with freely rotatably mounted mandrel rod is known.
  • Mandrel and mandrel rotate at a fixed connection between piercer and mandrel bar at an angular velocity, which is imposed by the rollers. Due to this rotational movement and with the associated low relative movement between piercer and rolling stock, the wear of the piercer is kept low at least in the stationary rolling phase.
  • the piercing pin axis is caused by disturbing influences, e.g. Temperature differences in the cross section of the block slightly shifted from the Walzgutmittenachse, resulting in an eccentric wall thickness distribution in the cross section of the rolled hollow block
  • DE 3602523 Cl is a rolling mill for punching blocks with
  • Rotational speed is accelerated. This ensures that even at the beginning of the hole process, the relative speed between piercer and rolling stock is low Thus, the wear of the piercer is further reduced. But even with this solution, the position of the piercing pin axis is unstable and dependent on interference. Associated with an unwanted and uninfluenced shift in the
  • Eccentricity can be reduced significantly and reliably.
  • the piercer is e.g. Rolling tests have been confirmed by means of an additional drive against the rotational movement of the rolling stock, and have confirmed that this eliminates a large part of the eccentricity, approximately 50%.
  • this method has the disadvantage that the piercer quickly wears due to the relative movement between piercer and rolling stock and consequently acting on the surface of the piercer shear stresses also due to the relative movement errors in the
  • the present invention has for its object to provide a method by which the disadvantages described are avoided by the eccentricity is reliably reduced without an increased relative movement between piercer and rolling occurs, and so increased wear and internal defects can be avoided.
  • the eccentricity of the rolling stock is significantly reduced, without the wear of the piercer is increased and without additional internal errors can occur.
  • the invention is based on the finding that the off-center rotational movement of the mandrel axis is to be regarded as a superposition of mostly two oscillations
  • the lines of the same wall thickness (FIG. 4 shows by way of example the line (12) of the maximum wall thickness) form an angle ⁇ (13) with the rolling stock longitudinal axis.
  • the wall thickness values are shown as two superimposed wall thickness distributions, the two being
  • the longitudinal axis of the piercer is opposite to Offset longitudinal axis of the mandrel. The offset is one or a few millimeters.
  • the mandrel bar is with one
  • FIG. 6 Another device of an advantageous embodiment of the teaching according to the invention is shown in Fig. 6 between the piercer and mandrel is an adapter
  • the mandrel rod axis are set in a rotation which is opposite to the rotation of the mandrel bar, when it is firmly connected to the piercer
  • Another finding underlying the invention relates to the frequency of the imposed vibration or rotational movement of the mandrel axis.
  • these lines are like helical lines along the rolling stock longitudinal axis.
  • Eccentricity and generated on the other hand a high-frequency eccentric rotation and thus an eccentricity that can be easily equalized in a downstream longitudinal rolling process.
  • the teaching of the invention can also be used in the second and third forming stage to effect an off-center movement of the inner tool. This movement promotes the flow of material in the circumferential direction of the rolling stock and thus leads to a compensation of wall thickness differences in the cross section of the
  • Fig. 1 Representation of the hole in the cross rolling mill in the longitudinal section of the rolling stock tool arrangement.
  • FIG. 2 Illustration of the hole in the cross rolling mill in the cross section of the rolling stock tool arrangement. (The representation of the lateral guides of the rolling stock has been omitted since they are not relevant for the described relationships.)
  • FIG. 2a shows a centric hole process and in FIG. 2b an eccentric hole process.
  • Fig. 3 illustration of a Walzgutqueriteses with eccentricity of the wall thickness T of the value of the eccentricity is determined with (t ma x - t m m) / t max + t m ⁇ ) x 100%.
  • Fig. 4 Representation of the distribution of the wall thickness of the rolling stock on the length coordinate and circumferential coordinate of the rolling stock.
  • FIG. 5 shows a device for producing an off-center rotary movement of the dome axis while maintaining the rotation of the dome in the direction and the rotational speed of the rolling stock.
  • Fig. 6 Representation of the generation of a rotational movement of the piercer

Abstract

L'invention concerne un procédé de fabrication de tubes d'acier sans soudure dans un train de laminage comportant une ou plusieurs cages de laminoir longitudinales ou obliques disposées les unes derrière les autres et un outil interne servant de mandrin ou de barre lors du laminage. La présente invention vise à créer un procédé qui permet de réduire notablement l'excentricité du produit de laminage. A cet effet, un mouvement est appliqué à l'axe longitudinal de l'outil interne au moyen d'un dispositif, à une certaine distance de l'axe longitudinal du produit de laminage.
EP13818650.7A 2012-11-03 2013-10-26 Procédé et dispositif de fabrication de tubes d'acier sans soudure a faible excentricite Ceased EP2919926A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012022014A DE102012022014B3 (de) 2012-11-03 2012-11-03 Verfahren zur Herstellung nahtloser Stahlrohre mit geringer Exzentrizität
PCT/DE2013/100371 WO2014067514A1 (fr) 2012-11-03 2013-10-26 Procédé et dispositif de fabrication de tubes d'acier sans soudure a faible excentricite

Publications (1)

Publication Number Publication Date
EP2919926A1 true EP2919926A1 (fr) 2015-09-23

Family

ID=49626081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13818650.7A Ceased EP2919926A1 (fr) 2012-11-03 2013-10-26 Procédé et dispositif de fabrication de tubes d'acier sans soudure a faible excentricite

Country Status (6)

Country Link
US (1) US9616475B2 (fr)
EP (1) EP2919926A1 (fr)
CN (1) CN104968447B (fr)
DE (1) DE102012022014B3 (fr)
RU (1) RU2652667C2 (fr)
WO (1) WO2014067514A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104324941B (zh) * 2014-09-05 2015-12-09 宁波惠杰钢管制造有限公司 一种穿孔顶杆装置及其使用方法
CN115608816B (zh) * 2022-12-02 2023-03-31 张家港嘉园钢铁制品有限公司 一种无缝钢管生产用矫正设备及其矫正方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443884A1 (fr) * 1978-12-15 1980-07-11 Vallourec Fabrication de tubes sans soudure de forts diametres
JPS59206105A (ja) * 1983-05-10 1984-11-21 Sumitomo Metal Ind Ltd 継目無管の製造方法
JPS60111703A (ja) * 1983-11-19 1985-06-18 Sumitomo Metal Ind Ltd 継目無管の製造方法
DE3602523C1 (de) * 1986-01-24 1986-12-18 Mannesmann AG, 4000 Düsseldorf Widerlager fuer ein Rohrwalzwerk
DE102005044777A1 (de) * 2005-09-20 2007-03-29 Sms Meer Gmbh Verfahren und Walzwerk zur Herstellung eines nahtlosen Rohres
EP2042247A1 (fr) * 2007-09-25 2009-04-01 SMS Meer GmbH Poinçon
DE102008056988A1 (de) * 2007-12-07 2009-06-10 Sms Meer Gmbh Verfahren und Walzwerk zum Herstellen von nahtlosen Stahlrohren
CN201197988Y (zh) * 2008-03-07 2009-02-25 无锡西姆莱斯石油专用管制造有限公司 一种锁紧顶头结构
CN201669268U (zh) * 2010-06-17 2010-12-15 济南重工股份有限公司 一种穿孔机顶杆随动支撑车

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2014067514A1 *

Also Published As

Publication number Publication date
RU2652667C2 (ru) 2018-04-28
US20150298185A1 (en) 2015-10-22
US9616475B2 (en) 2017-04-11
RU2015120959A (ru) 2016-12-20
CN104968447A (zh) 2015-10-07
DE102012022014B3 (de) 2013-12-12
WO2014067514A1 (fr) 2014-05-08
CN104968447B (zh) 2019-03-12

Similar Documents

Publication Publication Date Title
EP3393689B1 (fr) Laminoir à froid à pas de pèlerin
DE2259143B2 (de) Walzgerüst zum Walzen von im wesentlichen stangenförmigem Gut
DE2848990C2 (de) Verfahren und Vorrichtung zur Herstellung von Rohrluppen
DE102012022014B3 (de) Verfahren zur Herstellung nahtloser Stahlrohre mit geringer Exzentrizität
DE3406841C2 (fr)
EP2260956A1 (fr) Dispositif destiné à la fabrication de tubes ondulés en forme d'hélice
DE19516595C2 (de) Lochwalzverfahren und Lochwalzvorrichtung für nahtlose Stahlrohre
DE102005028667A1 (de) Vorrichtung zum Herstellen eines nahtlosen Hohlkörpers aus Stahl
DE10317312A1 (de) Vorrichtung zum Halten wenigstens einer Walze einer Walzmaschine
EP2593250B1 (fr) Procédé de fabrication d'un demi-produit
DE102005056649B3 (de) Vorrichtung zum Halten von wenigstens zwei Walzen einer Walzmaschine und Walzmaschine
EP3151986A1 (fr) Dispositif pour incorporer un moulage en forme de bourrelet dans une partie de paroi d'un tube
EP2604351A1 (fr) Laminage des profiles
EP2489445A1 (fr) Dispositif doté d'une multitude d'installations de laminage à froid
DE102017214897B4 (de) Anstellbares Walzgerüst für das Walzen von stabförmigem Walzgut mit einer asymmetrischen Verzahnung zwischen den Exzenterbuchsen sowie Exzenterbuchse mit asymmetrischer Verzahnung
DE10144743B4 (de) Walzgerüst zum Walzen von stab- oder rohrförmigem Gut
DE102008056988A1 (de) Verfahren und Walzwerk zum Herstellen von nahtlosen Stahlrohren
EP2683506B1 (fr) Procédé et dispositif de fabrication d'un ruban métallique
EP3999259B1 (fr) Laminage à froid du produit à laminer
EP2067542A1 (fr) Procédé et laminoir destinés à fabriquer des tuyaux en acier sans soudure
EP2121208B1 (fr) Procédé et dispositif pour laminer un matériau de laminage dans une installation de laminage, avec un laminoir à cylindres obliques
DE2029860C3 (de) Verfahren zur Herstellung von Molekularpumpen für Gaszentrifugen
EP1862235B1 (fr) Mandrin pour outil de cintrage à direction de cintrage variable
DE202023100646U1 (de) Dreiwalzen-Schrägwalzgerüst für die Herstellung rotationssymmetrischer Langprodukte in einem einstufigen Walzverfahren
EP1949979B1 (fr) Laminoir destiné à la fabrication de tuyaux sans fil et procédé de fonctionnement d'un laminoir

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150810

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20161124

REG Reference to a national code

Ref country code: DE

Ref legal event code: R003

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20190708