EP0601680B1 - Procédé de guidage d'une ébauche de tube - Google Patents

Procédé de guidage d'une ébauche de tube Download PDF

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Publication number
EP0601680B1
EP0601680B1 EP93250337A EP93250337A EP0601680B1 EP 0601680 B1 EP0601680 B1 EP 0601680B1 EP 93250337 A EP93250337 A EP 93250337A EP 93250337 A EP93250337 A EP 93250337A EP 0601680 B1 EP0601680 B1 EP 0601680B1
Authority
EP
European Patent Office
Prior art keywords
pipe
rollers
puddled iron
puddled
iron
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
EP93250337A
Other languages
German (de)
English (en)
Other versions
EP0601680A1 (fr
Inventor
Manfred Ing. Grad. Peglau
Paul Ing. Grad. Koenen
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0601680A1 publication Critical patent/EP0601680A1/fr
Application granted granted Critical
Publication of EP0601680B1 publication Critical patent/EP0601680B1/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
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • 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
    • B21B19/12—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 parallel to the axis of the work
    • B21B19/16—Rolling tubes without additional rollers arranged inside the tubes
    • 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

Definitions

  • the invention relates to a method for guiding a tube blank and reducing its end before it enters an immediately downstream Assel mill, according to the preamble of claim 1.
  • Pre-reduction devices of the generic type are known for example from DE 38 23 135 C 2. They are used to avoid the funnel-shaped, triangular end parts of tubes rolled from tube blanks in Assel rolling mills, which arise due to the process in that the tube end expands when the tube end is rolled. To avoid these trumpet-shaped pipe ends, DE 38 23 135 C 2 proposes to reduce the diameter of the end part of the pipe blank before it enters the reduction zone of the wood mill.
  • a pre-reduction facility will be free rotatable rollers used, which are arranged in a stand as seen in the rolling direction in front of the wood mill, the four rollers distributed over the circumference of the tube blank are centrally adjustable against the tube blank. Shortly before the end part of the tube blank enters this pre-reduction device, the rollers are turned on, thereby reducing the end portion of the tube blank.
  • the existing pre-reduction device is used for the purpose of pushing the short tube blank for rolling between woodleaf rollers, then taking over the tube guidance like a steady rest and finally at the tube end end with the aid of the rollers of the device to be driven centrically in the known manner reduce the tube blank wall thickness to avoid triangulation.
  • the pre-reduction device is therefore also used universally for rolling on the tube blank and for guiding to avoid twisting.
  • rollers are preferably freely rotatably mounted in a stand body, which is longitudinally displaceable with respect to the frame of the pre-reduction device in slide guides by means of piston-cylinder units arranged parallel to the longitudinal axis of the tube blank.
  • Simple sliding guides on both sides of the scaffold body enable the scaffold body to be guided securely by the required stroke of approximately 200 mm.
  • the scaffold body is preferably resiliently supported in the frame in order to be able to compensate for slight deflections as a result of irregularities over the longitudinal direction of the tube blank.
  • a short tube blank 4 lies in front of the front edge 1.
  • the dimension-dependent mandrel bar which can be seen at 2
  • the transport roller table 3 leads the unit consisting of tube blank 4 and mandrel bar 2 into the woodworking mill indicated at 5.
  • the rollers 7 of the pre-reduction device 6 move together centrally and clamp the outer diameter of the tube blank 4, actuated by hydraulic cylinders which are controlled as a function of the path.
  • the two hydraulic piston-cylinder units 8 arranged on the side move the entire pre-reduction device 6 together with the tube blank 4 by one stroke Approx.
  • An infrared eye detects the end of the slug and controls the piston-cylinder units for adjusting the rollers of the pre-reduction device 6 to a set value in a known manner. From a certain point in time, the end of the tube blank is reduced to such an extent that the triangulation of the tube blank 4 described in DE 38 23 135 C 2 and the resulting connector between the woodleaf rollers is prevented.
  • the rollers 7 of the pre-reduction device 6 are opened and the lateral piston-cylinder units 8 move the pre-reduction device back into the starting position for a new working cycle.
  • the pre-reduction device 6 can be used in addition to its actual purpose as a steady rest, i.e. can be used to guide pipe sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)

Claims (4)

  1. Procédé pour guider une ébauche de tube (4) et réduire son extrémité avant l'entrée dans un laminoir (5) qui est agencé directement en aval, au moyen d'un dispositif de pré-réduction (6) constitué de plusieurs rouleaux (7), répartis de façon uni forme autour de l'ébauche de tube (4) et pouvant être mis en contact centralement contre l'ébauche de tube (4), dont le mouvement de mise en contact peut être commandé en fonction de la position détectée de l'ébauche de tube (4),
    caractérisé en ce que, pour laminer des ébauches de tube (4) courtes, celles-ci sont introduites, par le déplacement du dispositif de pré-réduction (6), avec les rouleaux (7) serrant les ébauches de tube (4), dans le laminoir (5), et lors du laminage, elles sont guidées dans le laminoir (5) sous forme de lunette par les rouleaux (7) du dispositif de pré-réduction (6).
  2. Procédé selon la revendication 1,
    caractérisé en ce que le dispositif de pré-réduction (6) comporte trois rouleaux (7), répartis uniformément autour de l'ébauche de tube (4) et pouvant être mis en contact contre l'ébauche de tube (4), au moyen de vérins (8) agissant radialement vers le centre de l'ébauche de tube.
  3. Procédé selon la revendication 2,
    caractérisé en ce que les rouleaux (7) sont montés, de façon à pouvoir tourner librement, dans un corps de cage (9) qui peut être déplacé longitudinalement, par rapport au cadre du dispositif de pré-réduction (6), dans des guides à glissement (10), au moyen de vérins (8) agencés parallèlement à l'axe longitudinal de l'ébauche de tube.
  4. Procédé selon la revendication 3,
    caractérisé en ce que le corps de cage (9) prend appui de façon élastique dans le cadre (11).
EP93250337A 1992-12-11 1993-12-07 Procédé de guidage d'une ébauche de tube Expired - Lifetime EP0601680B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4242423 1992-12-11
DE4242423A DE4242423C1 (de) 1992-12-11 1992-12-11 Vorreduktionseinrichtung

Publications (2)

Publication Number Publication Date
EP0601680A1 EP0601680A1 (fr) 1994-06-15
EP0601680B1 true EP0601680B1 (fr) 1996-04-10

Family

ID=6475401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93250337A Expired - Lifetime EP0601680B1 (fr) 1992-12-11 1993-12-07 Procédé de guidage d'une ébauche de tube

Country Status (4)

Country Link
US (1) US5440911A (fr)
EP (1) EP0601680B1 (fr)
JP (1) JP3361375B2 (fr)
DE (2) DE4242423C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102989773A (zh) * 2012-12-18 2013-03-27 中国二冶集团有限公司 一种提高钢管穿孔机机架对中精度的施工方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4431410C1 (de) * 1994-08-24 1995-11-16 Mannesmann Ag Verfahren zum Walzen von Hohlblöcken auf einem Asselwalzwerk
KR100419864B1 (ko) * 2001-11-15 2004-03-04 한국화학연구원 신규 가교제와 이를 함유하는 가교형 고체 고분자 전해질

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU486820A1 (ru) * 1974-05-17 1975-10-05 Уральский научно-исследовательский институт трубной промышленности Устройство дл подготовки конца заготовки перед прокаткой
JPS5772708A (en) * 1980-10-24 1982-05-07 Nippon Kokan Kk <Nkk> Front and back roller guide for skew rolling mill
JPS57190708A (en) * 1981-05-18 1982-11-24 Kawasaki Steel Corp Rolling device for reducing wall thickness of pipe end of seamless steel pipe
DE3823135C3 (de) * 1988-07-05 1995-05-04 Mannesmann Ag Methode und Anordnung, durch Walzen den Außendurchmesser und die Wanddicke einer hauptsächlich zylindrisch gehohlten Rohrluppe zu reduzieren
JPH05309407A (ja) * 1992-05-08 1993-11-22 Nippon Steel Corp 軸材の押込装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102989773A (zh) * 2012-12-18 2013-03-27 中国二冶集团有限公司 一种提高钢管穿孔机机架对中精度的施工方法
CN102989773B (zh) * 2012-12-18 2015-03-25 中国二冶集团有限公司 一种提高钢管穿孔机机架对中精度的施工方法

Also Published As

Publication number Publication date
JP3361375B2 (ja) 2003-01-07
US5440911A (en) 1995-08-15
DE59302191D1 (de) 1996-05-15
EP0601680A1 (fr) 1994-06-15
DE4242423C1 (de) 1994-01-05
JPH06218407A (ja) 1994-08-09

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