EP0395191A1 - Procédé et dispositif pour refroidir un corps allongé et cylindrique - Google Patents

Procédé et dispositif pour refroidir un corps allongé et cylindrique Download PDF

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Publication number
EP0395191A1
EP0395191A1 EP90250103A EP90250103A EP0395191A1 EP 0395191 A1 EP0395191 A1 EP 0395191A1 EP 90250103 A EP90250103 A EP 90250103A EP 90250103 A EP90250103 A EP 90250103A EP 0395191 A1 EP0395191 A1 EP 0395191A1
Authority
EP
European Patent Office
Prior art keywords
cooling
rollers
contact
cooled
cooling medium
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Withdrawn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
EP90250103A
Other languages
German (de)
English (en)
Inventor
Hermann Dr. Ing. Schroeder
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 EP0395191A1 publication Critical patent/EP0395191A1/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Withdrawn legal-status Critical Current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
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0071—Levelling the rolled product

Definitions

  • the invention relates to a method for cooling a metallic, elongated cylindrical body heated to a certain temperature according to the preamble of the main claim.
  • the object of the invention is to provide a method for cooling a metallic, elongated cylindrical body, in particular a steel tube, in which the body is cooled in the form of a sub-step according to a flow production and the material properties are improved and made more uniform.
  • a plurality of surface areas of the helically moving body which are separated from one another, are brought into rolling contact with the element which is constantly acted upon by the cooling medium, for example water, several times over a period of time under the action of pressure.
  • the cooling medium for example water
  • heat transfer coefficients of at least 10 terrorism (Watt / m2 K) to 105 (Watt / m2 K) can be achieved, which are significantly higher than the values that can be achieved with laminar cooling.
  • the faster cooling that can be achieved with the higher heat transfer coefficients can advantageously be used to improve the material properties.
  • Another advantage of the proposed method is that the material characteristics achieved are evened out, since each surface element of the body to be cooled is subjected to the same treatment and areas with increased cooling are avoided.
  • the degree of cooling can be changed in a targeted manner by varying the duration of the contact time and increasing or reducing the number of surface areas of the body to be cooled that are in contact.
  • the proposed method is also suitable for directing the body to be cooled. To this end, it is further developed to make the contact pressure of the element variable, in such a way that the contact pressure of the element increases continuously or in sections in the transport direction. This procedure has the effect that, at the beginning of the process, cooling is predominant and, at the same time, straightening at the end.
  • the device proposed for carrying out the method has a plurality of roller sets arranged at a distance from one another, in which preferably two opposing rollers or three or four rollers with a hyperbolic contour distributed symmetrically over the circumference are arranged.
  • the rollers of the roller sets are acted upon by the cooling medium at a certain point on the circumference, in such a way that the cooling medium is pressed into the contact zone and forms a cooling wedge there.
  • the size of this cooling wedge is set by the coolant pressure and the amount of coolant.
  • the position of the rollers can be changed with regard to the size of the contact pressure and the degree of inclination to the transprot axis. This allows the contact duration and the type of contact to be varied.
  • the last-mentioned parameter can be set so that in the inlet area of the cooling device the contact zones of the body to be cooled with the rollers are separated from one another by a thin film of water under high pressure and in the outlet area the contact zones are metallic on one another.
  • the high pressure prevailing in the gap prevents the occurrence of the Leidenfrostschen phenomenon.
  • With an even greater contact pressure there is direct metallic contact, so that apart from the cooling, the device also acts as a straightening machine. This eliminates the need for final straightening, as is normally the case after heat treatment.
  • the number of roller sets to be arranged in the cooling device according to the invention essentially depends on the throughput speed, the dimension of the body to be cooled, the desired end temperature and the cooling speed.
  • a minimum number of three roller sets is proposed, which are optionally arranged in a plane that is offset from one another by a certain angle.
  • the cooling effect can also by the choice of the size of the rollers can be influenced, the cooling effect being increased with increasing size. However, the increasing design effort places limits on excessive roll dimensions.
  • the device can be used as a pure continuous system or as a system with a change in the direction of transport.
  • roller stands are used which can be opened laterally, so that the body to be cooled can be removed from the side in a manner similar to that in the outlet of a cross-rolling mill.
  • Fig. 1 the device according to the invention is shown in longitudinal section.
  • the tube 1 to be cooled is in full engagement in this representation, so that the maximum number of surface areas 2 of the tube 1 are in contact with the hyperbolic rollers 3.
  • All rollers 3 rotate in the same direction, shown here by the arrows 6 and by the oblique position of the rollers 3, 3 ', the tube 1 moves helically, here indicated by the arrow 4, through the device.
  • each roller set has two opposing rollers 3, 3 'and the distances 5 between the roller sets are the same.
  • all roller sets are on the same level, comparable to a straightening machine.
  • the tube 1 to be cooled lies with two surface areas in a line on the cooled rollers 3, 3 '.
  • the cooling medium for example water
  • the cooling medium is brought via a line 7, 7 'to the roller 3, 3' and a portion 8, 8 'of the peripheral surface of the rollers 3, 3' is acted upon.
  • the angle between the roller axis and the longitudinal axis of the tube 1 to be cooled can be changed as well as the contact pressure of the rollers 3, 3 '.
  • the desired cooling capacity can be varied within a certain range via the choice of the number of arranged roller sets and the size of the rollers 3.3 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Steel (AREA)
EP90250103A 1989-04-27 1990-04-24 Procédé et dispositif pour refroidir un corps allongé et cylindrique Withdrawn EP0395191A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893914218 DE3914218C2 (de) 1989-04-27 1989-04-27 Verfahren und Vorrichtung zum Abschrecken eines metallischen langgestreckten, zylindrischen Körpers
DE3914218 1989-04-27

Publications (1)

Publication Number Publication Date
EP0395191A1 true EP0395191A1 (fr) 1990-10-31

Family

ID=6379759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250103A Withdrawn EP0395191A1 (fr) 1989-04-27 1990-04-24 Procédé et dispositif pour refroidir un corps allongé et cylindrique

Country Status (3)

Country Link
EP (1) EP0395191A1 (fr)
JP (1) JPH0364418A (fr)
DE (1) DE3914218C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1232808A2 (fr) * 2001-02-17 2002-08-21 SMS Meer GmbH Procédé de laminage à froid de tubes en cuivre sans soudure

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140930A1 (de) * 1991-12-09 1993-06-17 Mannesmann Ag Vorrichtung zum kuehlen laengsnahtgeschweisster rohre
JP4757922B2 (ja) * 2009-01-05 2011-08-24 照雄 中村 眼鏡
DE102011114150B4 (de) * 2010-09-23 2015-06-11 Kocks Technik Gmbh & Co. Kg Walzanlage für ein Rohr und Kühlvorrichtung für ein Rohr

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1900016A1 (de) * 1969-01-02 1970-08-06 Hans Brauer Universal-Richtmaschine
DE2252722A1 (de) * 1971-01-13 1974-05-02 Southwire Co Verfahren und vorrichtung zum direkten kuehlen einer kontinuierlich gewalzten stange
EP0080932A1 (fr) * 1981-11-26 1983-06-08 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Procédé et installation pour effectuer le refroidissement contrôlé de tôles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1235350B (de) * 1958-04-12 1967-03-02 Ofag Ofenbau Ges M B H Verfahren und Vorrichtung zum Abschrecken von geradlinig in Laengsrichtung bewegten Rohren
DE1627454A1 (de) * 1967-07-31 1970-01-29 Arku Maschinen Und Appbau Artu Richtmaschine
US3780558A (en) * 1971-12-16 1973-12-25 Western Electric Co Apparatus for straightening elongated members
AT367320B (de) * 1978-11-14 1982-06-25 Hufnagl & Co Rista Draht Vorrichtung zum kaltverformen von metalldraht
DE3721665C1 (de) * 1987-06-26 1988-04-14 Mannesmann Ag Verfahren zum Haerten eines Hohlkoerpers
WO1989003729A1 (fr) * 1987-10-22 1989-05-05 Mannesmann Ag Procede de production d'un rideau d'eau

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1900016A1 (de) * 1969-01-02 1970-08-06 Hans Brauer Universal-Richtmaschine
DE2252722A1 (de) * 1971-01-13 1974-05-02 Southwire Co Verfahren und vorrichtung zum direkten kuehlen einer kontinuierlich gewalzten stange
EP0080932A1 (fr) * 1981-11-26 1983-06-08 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Procédé et installation pour effectuer le refroidissement contrôlé de tôles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1232808A2 (fr) * 2001-02-17 2002-08-21 SMS Meer GmbH Procédé de laminage à froid de tubes en cuivre sans soudure
EP1232808A3 (fr) * 2001-02-17 2004-09-29 SMS Meer GmbH Procédé de laminage à froid de tubes en cuivre sans soudure

Also Published As

Publication number Publication date
DE3914218C2 (de) 1994-08-18
JPH0364418A (ja) 1991-03-19
DE3914218A1 (de) 1990-10-31

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