EP0128112A2 - Procédé pour améliorer les tolérances de diamètre extérieur et d'épaisseur de paroi au cours du laminage de précision et du dégrossissage de tubes ébauchés - Google Patents

Procédé pour améliorer les tolérances de diamètre extérieur et d'épaisseur de paroi au cours du laminage de précision et du dégrossissage de tubes ébauchés Download PDF

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Publication number
EP0128112A2
EP0128112A2 EP84730038A EP84730038A EP0128112A2 EP 0128112 A2 EP0128112 A2 EP 0128112A2 EP 84730038 A EP84730038 A EP 84730038A EP 84730038 A EP84730038 A EP 84730038A EP 0128112 A2 EP0128112 A2 EP 0128112A2
Authority
EP
European Patent Office
Prior art keywords
rolling
roughly
stretch
wall thickness
reducing
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.)
Withdrawn
Application number
EP84730038A
Other languages
German (de)
English (en)
Other versions
EP0128112A3 (fr
Inventor
Walter Vom Dorp
Heinrich Steinbrecher
Karl Heinz Häusler
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 EP0128112A2 publication Critical patent/EP0128112A2/fr
Publication of EP0128112A3 publication Critical patent/EP0128112A3/fr
Withdrawn legal-status Critical Current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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/78—Control of tube rolling
    • 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

Definitions

  • the invention relates to a method for improving the diameter and wall thickness tolerance when rolling a tube blank in a sizing mill or stretch-reducing mill.
  • Seamless tubes are produced, for example, by punching in a cross-rolling mill, ramming on a push bench, reheating and then reducing the stretch.
  • this method it is not possible to do without reheating before the stretch reduction, since the blanks coming from the push bench have both cooled unevenly due to the internal roller rod and can already have a temperature which is below the level required for reducing the stretch.
  • rolling is carried out by a rolling rod which was previously introduced into the hollow block. This slug with a length of up to 40m emerges from the conical cross-rolling mill at a sufficiently uniform and high temperature.
  • the object of the invention is to develop the method of the type mentioned in such a way that differences in diameter or wall thickness of the finished tubes resulting from different temperatures of the tube blank can be avoided.
  • the colder end of a billet expediently first enters a sizing mill or stretch-reducing mill. Since the rolling speed, in particular of the stretch-reducing mill, is higher than that of a conical cross-rolling mill, the temperature of the billet just entering increases continuously towards the rear end.
  • the rolling speed of the sizing mill or the stretch-reducing mill is reduced or increased depending on the temperature gradient in the billet in such a way that each piece of the billet is constantly constant Temperature enters the rolling mill.
  • the remaining cooling time and the resulting required rolling speed are determined with the aid of a computer, and the required speed for the rolling speed is then set. In this way, the tolerances of the pipes can be significantly improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP84730038A 1983-05-26 1984-04-16 Procédé pour améliorer les tolérances de diamètre extérieur et d'épaisseur de paroi au cours du laminage de précision et du dégrossissage de tubes ébauchés Withdrawn EP0128112A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833319383 DE3319383A1 (de) 1983-05-26 1983-05-26 Verfahren zum verbessern der aussendurchmesser- und wanddickentoleranzen beim masswalzen und streckreduzieren von rohrluppen
DE3319383 1983-05-26

Publications (2)

Publication Number Publication Date
EP0128112A2 true EP0128112A2 (fr) 1984-12-12
EP0128112A3 EP0128112A3 (fr) 1985-04-17

Family

ID=6200098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84730038A Withdrawn EP0128112A3 (fr) 1983-05-26 1984-04-16 Procédé pour améliorer les tolérances de diamètre extérieur et d'épaisseur de paroi au cours du laminage de précision et du dégrossissage de tubes ébauchés

Country Status (3)

Country Link
EP (1) EP0128112A3 (fr)
JP (1) JPS59220204A (fr)
DE (1) DE3319383A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670141A1 (fr) * 1990-12-10 1992-06-12 Mannesmann Ag Procede et dispositif pour laminer des tubes, en particulier dans des laminoirs etireur-reducteur, a pas de pelerin ou en continu.
DE4241188A1 (de) * 1992-12-03 1994-06-09 Mannesmann Ag Verfahren zur Regelung der Streckung von Walzgut
EP1424109A1 (fr) 2002-11-12 2004-06-02 NORDICA S.p.A Dispositif de réglage, notamment pour régler la longueur d'un patin
CN101972776A (zh) * 2010-11-04 2011-02-16 胡顺珍 自动轧管机热轧生产工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411332A (en) * 1966-11-10 1968-11-19 Westinghouse Electric Corp Temperature control apparatus and method for operating a reduction rolling mill
DE1293114B (de) * 1962-08-24 1969-04-24 United Eng Foundry Co Verfahren zum Beeinflussen der Walztemperatur beim Fertigwalzen eines ueber seine Laenge abnehmende Temperatur aufweisenden Warmbandes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293114B (de) * 1962-08-24 1969-04-24 United Eng Foundry Co Verfahren zum Beeinflussen der Walztemperatur beim Fertigwalzen eines ueber seine Laenge abnehmende Temperatur aufweisenden Warmbandes
US3411332A (en) * 1966-11-10 1968-11-19 Westinghouse Electric Corp Temperature control apparatus and method for operating a reduction rolling mill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670141A1 (fr) * 1990-12-10 1992-06-12 Mannesmann Ag Procede et dispositif pour laminer des tubes, en particulier dans des laminoirs etireur-reducteur, a pas de pelerin ou en continu.
DE4241188A1 (de) * 1992-12-03 1994-06-09 Mannesmann Ag Verfahren zur Regelung der Streckung von Walzgut
EP1424109A1 (fr) 2002-11-12 2004-06-02 NORDICA S.p.A Dispositif de réglage, notamment pour régler la longueur d'un patin
CN101972776A (zh) * 2010-11-04 2011-02-16 胡顺珍 自动轧管机热轧生产工艺

Also Published As

Publication number Publication date
DE3319383A1 (de) 1984-11-29
EP0128112A3 (fr) 1985-04-17
JPS59220204A (ja) 1984-12-11

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

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Effective date: 19840630

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Effective date: 19841030

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Effective date: 19860305

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18W Application withdrawn

Withdrawal date: 19860826

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Inventor name: HAEUSLER, KARL HEINZ

Inventor name: VOM DORP, WALTER

Inventor name: STEINBRECHER, HEINRICH