EP1500441B1 - Cage de laminoir pour la fabrication des tubes sans soudure - Google Patents

Cage de laminoir pour la fabrication des tubes sans soudure Download PDF

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Publication number
EP1500441B1
EP1500441B1 EP04016328A EP04016328A EP1500441B1 EP 1500441 B1 EP1500441 B1 EP 1500441B1 EP 04016328 A EP04016328 A EP 04016328A EP 04016328 A EP04016328 A EP 04016328A EP 1500441 B1 EP1500441 B1 EP 1500441B1
Authority
EP
European Patent Office
Prior art keywords
tube
section
rolling mill
conical
mill according
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
EP04016328A
Other languages
German (de)
English (en)
Other versions
EP1500441A1 (fr
Inventor
Thomas Leisten
Frank Salomon
Jürgen Pietsch
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 Group GmbH
Original Assignee
SMS Meer GmbH
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 Meer GmbH filed Critical SMS Meer GmbH
Priority to PL04016328T priority Critical patent/PL1500441T3/pl
Priority to SI200430043T priority patent/SI1500441T1/sl
Publication of EP1500441A1 publication Critical patent/EP1500441A1/fr
Application granted granted Critical
Publication of EP1500441B1 publication Critical patent/EP1500441B1/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
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • 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
    • 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
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/021—Rolls for sheets or strips
    • B21B2027/022—Rolls having tapered ends

Definitions

  • the invention relates to a rolling mill for producing a seamless tube, in particular a steel tube having a number of rollers, which roll the outer circumference of the tube or the precursor of the tube, and a dome-shaped inner tool, which is arranged coaxially to the tube or to the precursor of the tube wherein a nip is defined between the rollers and the inner tool and the rollers and the inner tool are suitable for sequentially punching the precursor of the tube and elongating the tube.
  • the production of seamless steel tubes can be done on slanting mills, where the manufacturing process takes place in two different phases.
  • a steel block is pushed into the rolling mill and punched after gripping by the rollers by being rolled over an internal tool in the form of a freely rotatable dome to the hollow block.
  • the elongation (stretching), d. H. the hollow block is rolled out to the desired tube.
  • the rolling is carried out, for example, in a three-roll cross rolling mill.
  • a three-roll cross rolling mill for related art, reference is further made to DE-PS 259 623 and DE-PS 259 625.
  • a conventional cross rolling mill is described which operates with conventional calibers of roller and inner tool. With this, however, are none Thin-walled dolls can be produced. Therefore, the prior art rolling process is not competitive with modern Assel processes.
  • Assel rolling mills for elongating thin-walled slabs in multi-roll cross-rolling mills require a higher investment cost.
  • the punching is carried out in a first sub-process, in which case the axis of the roller and the precursor to be perforated of the tube are arranged to each other so that they include an angle.
  • the roll axis and tube axis are aligned parallel to one another.
  • the invention is therefore the object of providing a rolling mill of the type mentioned, with which the combined punching and elongating a pipe can be carried out process-reliable and economical.
  • the rollers each have at least one section in both axial end regions, which is designed for gripping and transporting the tube or the precursor of the tube such that a cylindrical one is provided between the two sections provided in the axial end regions formed portion and that the inner tool in an axial end portion has a hole portion for punching the precursor of the tube and a cylinder portion adjacent to the hole portion for cooperating with the cylindrically shaped portion for elongating the tube, wherein the portions for gripping and transporting and the cylindrical trained portion are arranged to each other so that both the perforation and the elongation of the tube or the precursor of the tube in an arrangement of the axis of the roller takes place parallel to the axis of the tube or the precursor of the tube.
  • At least one of the sections is conically shaped in the axial end regions of the rollers.
  • the cone angle of the sections is preferably between 1 ° and 5 °.
  • the outlet of the tube from the rollers is optimized when the axial ends of the rollers are formed as radial cross-sectional end portions.
  • a conically shaped connecting section is arranged following the hole section of the tool provided for punching.
  • the cone angle of the connection section is preferably between 2 ° and 15 °.
  • the cone-shaped connecting section consists of two sections, each having different cone angles. Particularly favorable forming conditions result when the second cone angle of one connection section is smaller than the first cone angle of the other connection section.
  • An optimized design of the roll gap between the rollers and the inner tool is achieved if it is provided according to a development that the cone angle of a connecting portion of the inner tool is greater than the cone angle of the other portion of the rollers.
  • the rollers 2 thus represent the rollers of a three-roll cross-rolling mill, which, in cooperation with the inner tool 4, perform a combined punching and elongation of the precursor 3 or of the tube 1.
  • both the rollers 2 and also the inner tool 4 are provided with a special calibration, which makes possible the rolling of a thin-walled hollow block and a subsequent production of a thin-walled billet in a reversing step.
  • Both the roller 2 and the inner tool 4 are thus calibrated specifically for the rolling of said thin-walled hollow blocks.
  • the precursor 3 (block) is pushed into the rolling mill and rolled after gripping by the rollers 2 on the freely rotatable inner tool 4 to the hollow block.
  • the roller 2 in its illustrated in Figure 1 left axial end portion 5 has a conically shaped portion 7; the cone angle ⁇ 1 is about 5 °, preferably it is between 3 ° and 7 °.
  • the cone angle ⁇ 3 here is about 2 °, preferably between 1 ° and 3 °.
  • the cone angle ⁇ 2 is larger here and is about 7 °, preferably between 5 ° and 9 °.
  • a cylindrically shaped portion 13 is arranged.
  • end portions 16 and 17 which have a radially shaped profile in cross-section (see, radius R), in order to ensure optimum entry and exit of the tube 1.
  • the inner tool 4 has in its axial end portion 9 on a hole portion 10, with which in the usual way, the block can be processed into a hollow block.
  • the hole section 10 has a radial profile in longitudinal section (see radius R).
  • the inner tool 4 After punching, the elongation closes in a reversing step, for which purpose the inner tool 4 has an elongated cylinder section 11.
  • Fig. 2 the interaction of the roller 2 with the cylinder portion 11 is shown, wherein it can be seen that the prefabricated tube 1 (hollow block) is rolled to the finished seamless tube 1.
  • connection section 18, 19 The transition from the hole section 10 of the inner tool 4 to the cylinder section 11 is formed by a connection section 18, 19. This is - as can be seen in Fig. 1 - composed of two sections 18 and 19, wherein both terminal portions 18, 19 are each formed conical.
  • the cone angles ⁇ 1 and ⁇ 2 are plotted in FIG. 1, wherein it can be seen that the cone angle ⁇ 1 of the connection section 18 adjacent to the hole section 10 is greater than the cone angle ⁇ 2 of the connection section 19 adjacent to the cylinder section 11.
  • the values lie for ⁇ 1 at about 13 °, preferably between 11 ° and 15 °, and for ⁇ 2 at about 4 °, preferably between 2 ° and 6 °.
  • the block (precursor 3) is gripped by the rollers 2 and rolled over the freely rotatable inner tool 4 to the hollow block.
  • the rolling stock with the end portion 16 has no contact.
  • the section 7 is designed with its cone angle ⁇ 1 so that on the one hand the gripping of the rolling stock and on the other hand, the overcoming of the axial dome resistance is ensured.
  • d. H. During elongation, avoid unnecessary burden or twisting of the rolling stock by widening or triangulation in the mill outlet.
  • the cylindrically shaped portion 13 extends parallel to the rolling axis.
  • the further section 12 and its cone angle ⁇ 2 are dimensioned so that in the first step (punching) an increase in diameter with simultaneous reduction in wall thickness of the rolling stock, whereby the process-related Endentriangulation thin-walled hollow blocks is significantly suppressed or reduced.
  • the section 8 of the roller 2 is conical. In the first step (punching), this section serves in conjunction with the inner tool 4 to equalize the hollow block wall thickness, in the second step (elongation), the rolling stock is gripped here.
  • the cone angle ⁇ 3 is chosen so that both conditions are met.
  • the inner tool 4 consists of the three sections mentioned:
  • the hole section 10 serves to punch the block and to cope with most of the wall thickness reduction. He is designed radially or curved.
  • the connecting sections 18 and 19 are configured conical, wherein the remaining wall thickness reduction takes place in the connection section 18 to achieve the nominal wall and a targeted diameter increase of the hollow block.
  • the angle ⁇ 1 is correspondingly larger than the angle ⁇ 2 formed.
  • the wall thickness of the tube 1 is made uniform.
  • Elongation takes place in a rolling direction opposite to the perforation.
  • the rollers 2 are moved to the working position for the second step (elongation).
  • the inner tool 4 is moved to the required axial position and lubricated.
  • the inner tool 4 is then moved in a controlled manner in or against the rolling direction.
  • the rolling stock is gripped in the region of section 8 of the roll 2.
  • the angle ⁇ 3 is chosen here so that the gripping condition is met.
  • the further portion 12 of the roller 2 has the task, in cooperation with the inner tool 4 to reduce the wall thickness of the rolling stock to the nominal wall thickness.
  • This section is designed to be as short as possible in order to prevent excessive diameter increase of the rolling stock.
  • the cylindrically shaped portion 13 of the roller 2 extends parallel to the rolling rod to achieve a homogenization of the wall thickness.
  • the adjacent section 7 of the roller 2 has the cone angle ⁇ 1 .
  • the roll gap is to become larger in this area in Walzgutauslaufraum quickly to allow a rounding of the rolling stock and to avoid twisting.
  • the roll gap is fed to the nominal gap after the start of rolling and is raised towards the end of the roll from the nominal gap (so-called "quick closing", see DE 197 24 233 A1).
  • the combined hole-type cross-rolling mill is able to produce not only relatively thick-walled tubes, but to realize the same production area as modern Assel mill mills.
  • the advantage thus achieved is that reduced investment costs are possible - compared to modern Asselstrassen. Furthermore, it is possible to achieve lower product manufacturing costs at lower annual tonnages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Heat Treatment Of Steel (AREA)
  • Drilling Tools (AREA)
  • Laminated Bodies (AREA)

Claims (11)

  1. Laminoir pour la fabrication d'un tube sans soudure (1), notamment d'un tube en acier, comportant
    un nombre de cylindres (2) qui laminent la périphérie extérieure du tube (1) ou du produit semi-fini (3) du tube (1) et
    un outil interne (4) de la forme d'un mandrin, qui est disposé de façon coaxiale par rapport au tube (1) ou au produit semi-fini (3) du tube (1),
    un interstice de laminage étant défini entre les cylindres (2) et l'outil interne (4) et
    les cylindres (2) et l'outil interne (4) étant adaptés pour la perforation séquentielle du produit semi-fini (3) du tube (1) et pour l'élongation du tube (1),
    l'outil interne (4) comportant dans une zone d'extrémité axiale (9) une section perforatrice (10) pour la perforation du produit semi-fini (3) du tube (1), ainsi qu'une section cylindrique (11) voisine de la section perforatrice (10) destinée à coopérer avec la section conçue sous forme cylindrique (13) pour l'élongation du tube (1),
    caractérisé en ce que
    dans les deux zones d'extrémité axiales (5, 6), les cylindres (2) comportent chacun au moins une section (7, 8), qui est conçue pour la préhension et le transport du tube (1) ou du produit semi-fini (3) du tube (1)
    en ce qu'une section (13) conçue sous forme cylindrique est disposée entre les deux sections (7, 8) des cylindres (2) prévues dans les zones d'extrémité axiales (5, 6),
    les sections (7, 8) pour la préhension et le transport et les sections (13) conçues sous forme cylindrique étant disposées les unes par rapport aux autres de façon à ce qu'on provoque aussi bien la perforation que l'élongation du tube (1) ou du produit semi-fini du tube (1) lors de l'agencement de l'axe du cylindre (2) à la parallèle de l'axe du tube (1) ou du produit semi-fini (3) du tube (1).
  2. Laminoir selon la revendication 1,
    caractérisé en ce que l'une des sections (7, 8) est conçue sous forme conique dans les zones d'extrémité (5, 6) des cylindres (2).
  3. Laminoir selon la revendication 2,
    caractérisé en ce que l'angle de cône (α1, α2) des sections (7, 87) se situe entre 1° et 5°.
  4. Laminoir selon la revendication 2 ou 3,
    caractérisé en ce que dans une zone d'extrémité axiale (6), une section supplémentaire (12) conçue sous forme conique se raccorde sur la section (8) conçue sous forme conique, en direction de l'autre zone d'extrémité axiale (5).
  5. Laminoir selon la revendication 4,
    caractérisé en ce que la section supplémentaire (12) conçue sous forme conique présente un angle de cône (α2) supérieur à celui de la section voisine (8) conçue sous forme conique.
  6. Laminoir selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que les extrémités axiales (14, 15) des cylindres (2) sont conçues sous la forme de sections d'extrémités (16, 17) de section transversale radiale.
  7. Laminoir selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce qu'une section de raccordement (18, 19) conçue sous forme conique est disposée à la suite de la section perforatrice (10) de l'outil interne (4), prévue pour la perforation.
  8. Laminoir selon la revendication 7,
    caractérisé en ce que l'angle de cône (β1, β2) de la section de raccordement (18, 19) se situe entre 2° et 15°.
  9. Laminoir selon la revendication 7 ou 8,
    caractérisé en ce que la section de raccordement (18, 19) conçue sous forme conique est constituée de deux sections partielles, qui présentent respectivement des angles de cône différents (β1, β2).
  10. Laminoir selon la revendication 9,
    caractérisé en ce que le deuxième angle de cône (β2) de l'une des sections de raccordement (19) est inférieur à l'angle de cône (β1) de l'autre section de raccordement (18).
  11. Laminoir selon la revendication 10,
    caractérisé en ce que l'angle de cône (β1) de l'une des sections de raccordement (18) de l'outil interne (4) est supérieur à l'angle de cône (α2) de la section supplémentaire (12) des cylindres (2).
EP04016328A 2003-07-25 2004-07-12 Cage de laminoir pour la fabrication des tubes sans soudure Expired - Lifetime EP1500441B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL04016328T PL1500441T3 (pl) 2003-07-25 2004-07-12 Walcarka do wytwarzania rury bezszwowej
SI200430043T SI1500441T1 (sl) 2003-07-25 2004-07-12 Valjarna za izdelavo brezsivne cevi

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334011 2003-07-25
DE10334011A DE10334011B3 (de) 2003-07-25 2003-07-25 Walzwerk zur Herstellung eines nahtlosen Rohres

Publications (2)

Publication Number Publication Date
EP1500441A1 EP1500441A1 (fr) 2005-01-26
EP1500441B1 true EP1500441B1 (fr) 2006-05-10

Family

ID=32695269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04016328A Expired - Lifetime EP1500441B1 (fr) 2003-07-25 2004-07-12 Cage de laminoir pour la fabrication des tubes sans soudure

Country Status (9)

Country Link
EP (1) EP1500441B1 (fr)
CN (1) CN100344388C (fr)
AT (1) ATE325665T1 (fr)
DE (2) DE10334011B3 (fr)
ES (1) ES2263093T3 (fr)
PL (1) PL1500441T3 (fr)
PT (1) PT1500441E (fr)
RU (1) RU2270068C1 (fr)
SI (1) SI1500441T1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010009593A1 (de) * 2010-02-26 2011-09-01 Kocks Technik Gmbh & Co. Kg Walzgerüst
CN107999540A (zh) * 2017-08-09 2018-05-08 鑫鹏源智能装备集团有限公司 一种特厚壁用穿孔机轧辊
CN110421080A (zh) * 2019-08-12 2019-11-08 江苏鼎宇机械制造股份有限公司 一种汽车前轴钢管缩管工装

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE259623C (fr) *
DE260425C (fr) *
US2197098A (en) * 1936-12-07 1940-04-16 Nat Tube Co Mandrel
GB2086283A (en) * 1980-10-29 1982-05-12 Metcalfe John Tube-forming process
DE3622678A1 (de) * 1985-07-12 1987-01-15 Kocks Technik Verfahren und vorrichtung zum querwalzen nahtloser rohrluppen
CN85106452B (zh) * 1985-08-28 1987-04-08 高建民 无缝钢管轧机
US4798071A (en) * 1986-06-25 1989-01-17 Kocks Technik Gmbh & Co. Seamless tube production
DE3717698A1 (de) * 1986-06-25 1988-01-14 Kocks Technik Verfahren und anlage zum herstellen nahtloser rohre
GB8816390D0 (en) * 1988-07-09 1988-08-17 Metcalf J Rolling mill & method
DE19724233C2 (de) * 1997-06-03 2003-10-16 Sms Demag Ag Verfahren zur Vermeidung oder Verminderung trompetenförmiger Aufweitungen am Rohrende beim Schrägwalzen von dünnwandigen Rohren und Vorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
EP1500441A1 (fr) 2005-01-26
SI1500441T1 (sl) 2006-10-31
DE10334011B3 (de) 2004-08-12
CN100344388C (zh) 2007-10-24
ES2263093T3 (es) 2006-12-01
CN1575877A (zh) 2005-02-09
RU2270068C1 (ru) 2006-02-20
PL1500441T3 (pl) 2006-08-31
PT1500441E (pt) 2006-08-31
ATE325665T1 (de) 2006-06-15
DE502004000529D1 (de) 2006-06-14

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