EP0445899A1 - Méthode pour manufacture pour tubes sans couture avec épaisseurs moyennes et minces et dispositif de laminage d'exécution - Google Patents

Méthode pour manufacture pour tubes sans couture avec épaisseurs moyennes et minces et dispositif de laminage d'exécution Download PDF

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Publication number
EP0445899A1
EP0445899A1 EP91250045A EP91250045A EP0445899A1 EP 0445899 A1 EP0445899 A1 EP 0445899A1 EP 91250045 A EP91250045 A EP 91250045A EP 91250045 A EP91250045 A EP 91250045A EP 0445899 A1 EP0445899 A1 EP 0445899A1
Authority
EP
European Patent Office
Prior art keywords
rolling
hollow body
angle
inner tool
rollers
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
EP91250045A
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German (de)
English (en)
Other versions
EP0445899B1 (fr
Inventor
Rolf Dr. Kümmerling
Manfred Dr.-Ing. Bellmann
Horst Dr.-Ing. Biller
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.)
Vodafone GmbH
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
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Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0445899A1 publication Critical patent/EP0445899A1/fr
Application granted granted Critical
Publication of EP0445899B1 publication Critical patent/EP0445899B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills
    • B21B19/10—Finishing, e.g. smoothing, sizing, reeling

Definitions

  • the invention relates to a method for producing medium and thin-walled seamless tubes according to the preamble of claim 1 and a rolling device for performing the method.
  • a disadvantage of the plug rolling process is that the plug rolling mill has to be followed by two parallel smoothing mills (Reeler) and a sizing or reducing mill in order to equalize the wall thickness ridges resulting from longitudinal rolling and to achieve an acceptable roundness for performance reasons.
  • Reeler parallel smoothing mills
  • a sizing or reducing mill in order to equalize the wall thickness ridges resulting from longitudinal rolling and to achieve an acceptable roundness for performance reasons.
  • many scaffolding places mean high investment costs and a corresponding inventory of rolling stands.
  • the last forming step is only a calibration with a usual number of stands, but the surface quality, in particular the wall thickness tolerances of the piled pipe, no longer correspond to the increased ones in most cases Conditions.
  • the object of the invention is to provide a process for the production of medium and thin-walled seamless pipes with a diameter / wall thickness ratio in the range from 15: 1 to 50: 1, with which, starting from an elongated hollow body with the smallest possible system engineering outlay, the desired finished dimension for puter Surface quality and in compliance with the prescribed dimensional tolerances can be generated.
  • the main idea of the invention is to shape the elongated hollow body produced by various processes to the desired finished dimension by rolling in as little as possible with one roll pass, thereby significantly reducing the diameter and at the same time smoothing the inner surface using an inner tool.
  • this ideal concept with only a single rolling unit can only be realized if the corresponding framework conditions are present, i. H. there must be a hollow body which is ideal as a starting material with regard to tolerances and surface quality, which is then rolled to a dimension which represents an optimum in terms of tolerances and roundness, so that a subsequent calibration can be dispensed with.
  • the proposed rolling method is a combination of conventional smoothing (reeling) and diameter reduction
  • the rolling method according to the invention can also be referred to as reducing smoothing or reducing reel, which in principle can also be used for cold rolling.
  • the degree of reduction can also be set in the case of reducing smoothing in such a way that the diameter decrease is almost zero or the incoming hollow body is widened as in conventional smoothing.
  • This method is therefore very adaptable and can be used for the various requirements.
  • the rolling method according to the invention is particularly advantageous when viewed in the rolling direction, the incoming hollow body is first reduced in diameter and the inner surface is smoothed immediately thereafter.
  • This proposed sequence has the advantage that, depending on the utilization of the reducing part, it can both be reduced more or less and smoothed conventionally. In principle, one can also reverse the sequence without leaving the inventive idea, ie first smooth and then reduce. However, this has the disadvantage that there is no freedom in the degree of reduction and must always be smoothed and reduced at the same time.
  • the measure of shifting the inner tool when rolling on or off has the purpose of avoiding rolling or rolling plugs. If the process is limited to these phases, then during the remaining rolling time you have the condition of the stationary inner tool with the risk of scale build-up. If you want to avoid this, the inner tool must also be moved during the festive season. The design measures required for this are explained below.
  • the rolling device for carrying out the method is characterized in that, on the basis of a conventional smooth rolling mill with an internal tool, the run-in part of the rolls is designed as a reducing part with a reducing angle in the range from greater than 2 degrees to 10 degrees.
  • the usual smoothing mills are designed in the inlet section either as a barrel or as a divergent cone with a reduction angle of up to approx. 2 degrees (Hutnicke listy 38 (1983) No. 11, pages 779 - 782).
  • the inlet part of the roller according to the invention is followed by an almost cylindrical smoothing part with an arcuate transition with a difference angle to the working part of the inner tool of greater than 0 to less than 1.0 degree, which is then followed by the outlet part.
  • the discharge part has the task of rounding the rolling stock. So that a reduction in diameter is possible in the reduction smoothing or reduction corrugation according to the invention, the rolling stock must additionally be supported by two guides lying opposite one another and the forming zone closed.
  • the cylindrical or slightly conical working part of the inner tool extends axially over a larger area than the smoothing part of the rolls, the beginning of the working part of the inner tool lying in the rolling direction before the start of the smoothing part of the rolls. Due to the greater length of the working part of the inner tool compared to the smoothing part of the rollers, the inner tool does not need to be as precise be positioned.
  • the wear of the inner tool is reduced, since by changing the position of the inner tool between two successive rolling periods, the load maximum is always in one place of the working part.
  • a starting aid when the hollow body enters the rolling device according to the invention it is further proposed to connect the reducing part with a drawing-in part with a drawing-in angle of approximately 1 degree.
  • an additional torque generated by the tapered pull-in part is desired, which helps to bring the high body to be rolled to the smoothing part without it getting stuck in the reducing part due to the ovality caused by the reduction.
  • this section lies fully against the inner surface of the incoming hollow body.
  • the angle of this section is almost equal to the reduction angle of the rollers.
  • the position of the inner tool is chosen so that the overlap from the rolling part to the working part of the inner tool lies in the same plane perpendicular to the rolling axis as the transition from the reducing part to the smoothing part of the rollers.
  • the inner tool is pushed against the rolling direction, so that the transition from the rolling part to the working part of the inner tool is in the area of the reducing part of the roller.
  • the displacement of the inner tool against the rolling direction should be at least so great that there is no wall deformation by the inner tool in the reducing part.
  • the rolling part and the effective smoothing part of the inner tool do not follow one another directly. In between there is a section that does not perform any deformation tasks. This section is preferably designed as an extension of the smoothing part that is not effective in terms of deformation technology.
  • This embodiment of the inner tool has the advantage that the exact match between the smoothing part of the roller and the smoothing part of the inner tool is not necessary. This gives you more leeway to set the position of the inner tool. Above all, differences in the circumferential material speed over the length, which cannot be avoided for every setting with the same working length in the reduction part of the roller and inner tool, are noticeably less noticeable. Put simply, this means that the risk of inadmissible torsion of the hollow body to be rolled around the longitudinal axis when reducing while in contact with the internal tool is significantly reduced.
  • the method according to the invention can be varied in such a way that the rollers of the roller device not only have the usual transport angle, but also an angle of spread against the roller axis.
  • This variant is particularly advantageous if the point of intersection of the axes of the rolls with the roll axis lies behind the rolling mill, as viewed in the rolling direction, the transport angle being set to zero in the process.
  • an optimum is achieved when the size of the spreading angle is chosen so that the circumferential speed of the rollers decreases in proportion to the decreasing hollow body diameter for the mean diameter of the given dimensional range in the reducing part. This results in zero slip and with a linear contact of roller and hollow body for the hollow body, the same angular velocity for each point on its axis.
  • this preferably selected spreading angle optimizes the change in the circumferential speed of the roller over the length in such a way that the roller and the hollow body to be rolled, such as the gears of a gearbox, roll on one another, thereby twisting the rolling stock as little as possible about its longitudinal axis.
  • the rolling device shows the rolling device according to the invention during the rolling process in a half longitudinal cross section.
  • the rolling device consists of two rollers 1, 2 driven in the same direction, which are inclined by a transport angle to the rolling axis.
  • the rolling device has an inner tool 4 fastened to a holding rod 3.
  • the hollow body 5 to be rolled is fully engaged in the rolling in this illustration.
  • the roller 1 according to the invention has various sections, which are explained in detail below. Seen in the rolling direction, which is indicated by the arrow 6, the roller 1 has at the beginning a feed part 7, which merges into the end face 8 of the roller 1 on the inlet side.
  • the retraction part 7 is of divergent conical design with a retraction angle of approximately 7 degrees.
  • This feed part 7 serves as a starting aid and facilitates the rolling process.
  • the pull-in part 7 is followed by a reducing part 9 with a reducing angle in the range from greater than 2 to 10 degrees. In this section, the diameter of the incoming hollow body 5 is significantly reduced.
  • This smoothing part 11 closes with the working part 12 of the inner tool 4 a difference angle in the area from 0 to less than 1 degree.
  • the length of the working part 12 of the inner tool is always greater than the length of the smoothing part 11 of the rollers 1, 2.
  • the smoothing part 11 is followed by the already known outlet part 13, which has the task of rounding the outlet hollow body 5.
  • the guide is not shown, which in a known manner consists of two fixed guide rulers lying opposite one another in order to close the caliber.
  • the axes of the rollers 1, 2 have an angle of spread against the roller axis 14. In this variant, however, the position of the contour of the rollers 1, 2 with respect to the roller axis 14 would be retained.
  • FIG. 2 shows a half longitudinal cross section through the rolling device, but with a displaceable inner tool during different rolling phases.
  • the same reference marks are used for the same parts as in FIG. 1.
  • the inner tool 15 shown in FIG. 2 in the partial images a - c has two different sections.
  • the working part 12 is cylindrical, which, in contrast to FIG. 1, is preceded by a conical rolling part 16.
  • the cone angle of this rolling part 16 is almost equal to the cone angle of the reducing part 9 of the roller 1.
  • the inner tool 15 is adjusted relative to the roller 1 so that the transition from the working part 12 to the rolling part 16 of the inner tool 15 lies in the plane of the transition from the smoothing part 11 to the reducing part 9 of the roller 1.
  • the rolling-on phase is ended according to sub-picture b) when the hollow body 5 reaches the transition plane described.
  • the inner tool 15 is advanced so far against the rolling direction 6 that the transition region of the inner tool 15 lies in the reducing part 9 of the roller and the incoming hollow body 5 on Anwalztpil 16 of the inner tool 15 no longer comes to rest.
  • FIG. 17 A further exemplary embodiment of an inner tool 17 is shown in FIG.
  • this inner tool 17 has a cylindrical working part 12 which is extended so far against the rolling direction that it is over half the length of the reducing part 9 of the roller 1 protrudes. This is followed by a radial jump with a conical rolling part 18, the cone angle of which is approximately the same as the cone angle of the reducing part 9 of the roller 1.
  • This rolling part 18 extends in the longitudinal direction to the beginning of the reducing part 9 of the roller 1 or until the transition from reducing part 9 to feed part 7 of roller 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
EP91250045A 1990-03-06 1991-02-14 Méthode pour manufacture pour tubes sans couture avec épaisseurs moyennes et minces et dispositif de laminage d'exécution Expired - Lifetime EP0445899B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4007406A DE4007406C2 (de) 1990-03-06 1990-03-06 Verfahren zur Herstellung von mittel- und dünnwandigen nahtlosen Rohren und Walzeinrichtung zur Durchführung des Verfahrens
DE4007406 1990-03-06

Publications (2)

Publication Number Publication Date
EP0445899A1 true EP0445899A1 (fr) 1991-09-11
EP0445899B1 EP0445899B1 (fr) 1995-05-03

Family

ID=6401745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91250045A Expired - Lifetime EP0445899B1 (fr) 1990-03-06 1991-02-14 Méthode pour manufacture pour tubes sans couture avec épaisseurs moyennes et minces et dispositif de laminage d'exécution

Country Status (5)

Country Link
US (1) US5115656A (fr)
EP (1) EP0445899B1 (fr)
JP (1) JP3041068B2 (fr)
CZ (1) CZ285292B6 (fr)
DE (2) DE4007406C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2138348C1 (ru) * 1998-10-12 1999-09-27 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Способ горячей прокатки бесшовных тонкостенных труб

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731055A1 (de) * 1997-07-19 1999-01-21 Dynamit Nobel Ag Vorrichtung und Verfahren zum Einformen einer Rillenstruktur in ein rohrförmiges Werkstück
CN107363097A (zh) * 2017-08-30 2017-11-21 广东冠邦科技有限公司 管坯连续轧制的下料方法及设备
CN109859862B (zh) * 2019-01-31 2022-04-29 西部新锆核材料科技有限公司 一种锆合金燃料组件导向管及其制备方法
DE102024002391A1 (de) * 2024-07-23 2026-01-29 Zhozef Rotenberg Verfahren zum Strecken von mittel- und dünnwandigen Luppen in einem Mehrwalzen-Schrägwalzwerk unter dem Einfluss einer inneren axialen Zugkraft

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715847B1 (de) * 1977-04-06 1978-08-03 Mannesmann Ag Kalibrierung fuer ein Schraegwalzwerk
EP0204878A2 (fr) * 1985-02-18 1986-12-17 MANNESMANN Aktiengesellschaft Laminoir en croix
GB2178353A (en) * 1985-07-12 1987-02-11 Kocks Technik Rolling seamless tubes
DE3533119A1 (de) * 1985-09-17 1987-03-26 Kocks Technik Schraegwalzgeruest zum walzen von hohlbloecken
DE3710193C1 (de) * 1987-03-27 1988-05-19 Mannesmann Ag Verfahren zum Herstellen nahtloser Rohre ueber 200 mm Durchmesser und Vorrichtung zur Durchfuehrung des Verfahrens

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1368413A (en) * 1919-03-26 1921-02-15 Ralph C Stiefel Tube-rolling mechanism
NL37171C (fr) * 1931-04-04
US1964507A (en) * 1933-01-26 1934-06-26 Diescher Tube Mills Inc Mandrel feeding apparatus
US2005125A (en) * 1933-03-14 1935-06-18 Bannister Bryant Apparatus for sinking tubular work pieces
DE743823C (de) * 1936-12-19 1944-01-03 Roehrenwerke Ag Deutsche Schraegwalzwerk zur Herstellung insbesondere duennwandiger nahtloser Rohre
US2334853A (en) * 1940-01-03 1943-11-23 Nat Tube Co Seamless tube reeling
DE948682C (de) * 1952-08-12 1956-09-06 Phoenix Rheinrohr Ag Vereinigt Schulterwalzwerk zum Streckreduzieren vorzugsweise starkwandiger Rohre
DE3013127A1 (de) * 1980-04-01 1981-10-15 Mannesmann AG, 4000 Düsseldorf Schraegwalzwerk zum herstellen nahtloser rohre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715847B1 (de) * 1977-04-06 1978-08-03 Mannesmann Ag Kalibrierung fuer ein Schraegwalzwerk
EP0204878A2 (fr) * 1985-02-18 1986-12-17 MANNESMANN Aktiengesellschaft Laminoir en croix
GB2178353A (en) * 1985-07-12 1987-02-11 Kocks Technik Rolling seamless tubes
DE3533119A1 (de) * 1985-09-17 1987-03-26 Kocks Technik Schraegwalzgeruest zum walzen von hohlbloecken
DE3710193C1 (de) * 1987-03-27 1988-05-19 Mannesmann Ag Verfahren zum Herstellen nahtloser Rohre ueber 200 mm Durchmesser und Vorrichtung zur Durchfuehrung des Verfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2138348C1 (ru) * 1998-10-12 1999-09-27 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Способ горячей прокатки бесшовных тонкостенных труб

Also Published As

Publication number Publication date
CS9100481A2 (en) 1991-09-15
JP3041068B2 (ja) 2000-05-15
DE4007406C2 (de) 1994-01-20
CZ285292B6 (cs) 1999-06-16
DE59105350D1 (de) 1995-06-08
JPH04224008A (ja) 1992-08-13
EP0445899B1 (fr) 1995-05-03
US5115656A (en) 1992-05-26
DE4007406A1 (de) 1991-09-12

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