EP0707903B1 - Procédé et dispositif pour éviter un manque de parallélisme de profilés - Google Patents

Procédé et dispositif pour éviter un manque de parallélisme de profilés Download PDF

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Publication number
EP0707903B1
EP0707903B1 EP95250227A EP95250227A EP0707903B1 EP 0707903 B1 EP0707903 B1 EP 0707903B1 EP 95250227 A EP95250227 A EP 95250227A EP 95250227 A EP95250227 A EP 95250227A EP 0707903 B1 EP0707903 B1 EP 0707903B1
Authority
EP
European Patent Office
Prior art keywords
coolant
rolling
nozzles
web
universal
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
EP95250227A
Other languages
German (de)
English (en)
Other versions
EP0707903A3 (fr
EP0707903A2 (fr
Inventor
Roland Dipl.-Ing. Krengel
Hans-Peter Griess
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 Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP0707903A2 publication Critical patent/EP0707903A2/fr
Publication of EP0707903A3 publication Critical patent/EP0707903A3/fr
Application granted granted Critical
Publication of EP0707903B1 publication Critical patent/EP0707903B1/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
    • 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

Definitions

  • the invention relates to a method and a device to avoid that when rolling girders on universal girder lines occurring non-parallelism of the carrier profiles by partial loading of the carrier with coolant.
  • Twisting of the parallel flanges is observed, this in the DIN standard as non-parallelism and is called wide top in English. Twisting the Beam profiles during cooling is by widening the top and one Contraction marked the lower flange halves and represents a general Problem. To a certain extent, the non-parallelism of the flanges in the downstream straightening machines are eliminated provided the introduction of the beam is possible in these machines.
  • Cooling devices preferably behind the carrier line and used after the rolling process to influence the structure.
  • Cooling units are known, with which a partial cooling of the flanges during the Rolling process can be carried out to the transition area between the web and flange with regard to the structural properties of the finished product influence (DE-OS 1452106).
  • DE-A1-4009707 has disclosed a method for the thermal straightening of rolled special profiles, which is only used after the carrier has run out of the finishing stand.
  • Spray devices in front of carrier lines are also known, which serve to remove the adhering scale.
  • the resulting cooling effect is undesirable. It was recognized that the problem of non-parallelism of the rolled beams described at the outset is due to the fact that during the hot rolling of these beams in the universal stand or the universal stands, the roll cooling water continuously runs into the upper chamber of the horizontally rolled profile and there to one-sided cooling of the The top of the bridge leads. Since the lower chamber of the profile hardly comes into contact with roller cooling water, the carrier warps, which can reach such dimensions that it can only be fixed with difficulty in a downstream straightening machine.
  • both the upper side of the web and the underside of the web are included Cooling water applied.
  • the roller cooling water remains in the upper chamber, the disadvantages of warping the beam described above are not eliminated.
  • the method proposed here differs from known methods in that it is used during the rolling process and is used for partial cooling of the underside of the web. This eliminates the asymmetrical temperature profile in the web, which is caused by the roller cooling water that has entered the upper carrier chamber in an uncontrolled manner. It has been recognized that a uniform temperature profile cannot be achieved by cooling once after the finish stitch, but must already take place in the preceding roll passes during rolling. If, as a result of the measures of the invention, the rolling stock has an approximately uniform web temperature when it emerges from the finishing stand and has a small temperature gradient over the web thickness, then it can be achieved that the flanges remain parallel during the subsequent cooling process.
  • the cooling intensity is through Regulation of the coolant quantity and / or loading density depending on the temperature measured at the top and bottom of the web and from it calculated temperature difference regulated.
  • the Surface temperatures on the top and bottom of the web with a Measuring device detected and fed to a computer system, which continuously the Temperature distribution in the rolling stock is determined and from this the time of connection of the coolant and the necessary water pressurization density in each Roll pass determined.
  • a device for avoiding the rolling of girders on universal girder lines occurring non-parallelism of the carrier profiles due to partial causes the carrier to be charged with coolant characterized in that in or in the immediate vicinity of at least one universal rolling stand only in the area of the underside of the web of the beam and directed towards this Coolant nozzles are arranged.
  • the arrangement of these nozzles can Cooling of the underside of the web in one or during the rolling process several stitches take place and thus a strong cooling off after exiting the finishing stand can be avoided, leading to the occurrence of cracks and warpage can lead.
  • the continuous cooling via the coolant nozzles enables one targeted control of the uniformity of the temperature profile by a Cooling after the rolling process and the associated large Temperature gradients within the web cannot be reached.
  • the coolant nozzles are preferably in the area of the reversing universal roll stands arranged. When rolling beams in continuous universal beam lines the coolant nozzles are conveniently located at several locations within the road arranged.
  • the individual coolant nozzles can be switched on and off separately, so both the width of the cooling surface and the coolant loading density can be regulated.
  • both coolant nozzles with a round or oval spray pattern can be used, as well as according to another feature Coolant nozzles with flat jet nozzles with a rotatable adjustment to the Carrier profile can be aligned.
  • a coolant bar 1 is shown schematically below the roller table levels 9 a universal roll stand indicated at 10. It can be seen from FIG. that the coolant nozzles 8 are inclined towards the rolling direction 7 and thereby the Coolant flow directed against the rolling direction on the underside of the web is applied.
  • the arrangement of two coolant nozzles 8 on the one designed as a tube Spray bar 1 is shown in Figure 3.
  • the nozzle slots 11 can be rotated (in FIG 3 visible on the left), so that the width and coverage of each Coolant jets can be adapted to the chamber width of the carrier.
  • From the View A (right half of Figure 3) shows that the coolant nozzles are offset are arranged to each other on the spray bar (water supply pipe) 1 and that Aim coolant at different angles ⁇ and ⁇ on the carrier. This will the largest possible coolant application area is set on the carrier and thus achieving an intensive cooling effect.
  • FIGS. 4 to 6 beams 12, 13 and 14 of different width are in cross section shown.
  • coolant nozzles 8 As shown on the spray bar 1 in Fig .1 are to cover the entire width of the web 15.
  • a medium width beam 14 is with two Sprayed on coolant nozzle pairs, which corresponds to the spray bar 2 in Figure 1.
  • flat jet nozzles with rotatable adjustment are used, which allow the cheapest adaptation to the width of the respective web 15.

Landscapes

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

Claims (8)

  1. Procédé pour éviter le défaut de parallélisme, apparaissant lors du laminage de poutrelles sur des trains à poutrelles universels, des poutrelles profilées par alimentation partielle des poutrelles en agent de refroidissement,
    caractérisé en ce que, pour régler un profil de température sensiblement symétrique dans l'âme, l'agent de refroidissement est appliqué, pendant le processus de laminage, exclusivement sur le dessous de l'âme, et en ce que l'intensité du refroidissement est réglée par réglage de la quantité d'agent de refroidissement et/ou de l'intensité d'alimentation de façon dépendant de la température mesurée sur le dessus et le dessous de l'âme et de la différence de températures calculée à partir de cela.
  2. Dispositif pour éviter le défaut de parallélisme, apparaissant lors du laminage de poutrelles sur des trains à poutrelles universels, des poutrelles profilées par alimentation partielle des poutrelles en agent de refroidissement,
    caractérisé en ce que des buses d'agent de refroidissement (8) sont agencées exclusivement dans la zone du dessous de l'âme (15) de la poutrelle (12, 13, 14) et de façon orientée vers celui-ci dans ou à proximité directe d'au moins une cage de laminoir universelle (10).
  3. Dispositif selon la revendication 2,
    caractérisé en ce que les buses d'agent de refroidissement (8) sont agencées dans la zone des cages de laminoir universelles réversibles (8).
  4. Dispositif selon la revendication 2,
    caractérisé en ce que les buses d'agent de refroidissement (8) sont agencées en plusieurs endroits d'un train à poutrelles universel continu.
  5. Dispositif selon les revendications 2 à 4,
    caractérisé en ce que les buses d'agent de refroidissement (8) sont agencées, sur des barres de pulvérisation (1, 2, 3) disposées l'une derrière l'autre, de façon décalée latéralement l'une derrière l'autre et de façon inclinée par rapport à la direction de laminage (7).
  6. Dispositif selon les revendications 2 à 5,
    caractérisé en ce que des buses individuelles d'agent de refroidissement (8) peuvent être mises en service et hors service de façon séparée.
  7. Dispositif selon les revendications 2 à 6,
    caractérisé en ce que des buses d'agent de refroidissement (8) ayant un jet rond ou ovale peuvent être utilisées.
  8. Dispositif selon les revendications 2 à 6,
    caractérisé en ce que les buses d'agent de refroidissement (8) sont des buses à jet plat à réglage rotatif.
EP95250227A 1994-10-19 1995-09-18 Procédé et dispositif pour éviter un manque de parallélisme de profilés Expired - Lifetime EP0707903B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4438822 1994-10-19
DE4438822A DE4438822A1 (de) 1994-10-19 1994-10-19 Verfahren und Vorrichtung zum Vermeiden der Unparallelität von Trägerprofilen

Publications (3)

Publication Number Publication Date
EP0707903A2 EP0707903A2 (fr) 1996-04-24
EP0707903A3 EP0707903A3 (fr) 1997-05-02
EP0707903B1 true EP0707903B1 (fr) 2001-07-25

Family

ID=6532107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250227A Expired - Lifetime EP0707903B1 (fr) 1994-10-19 1995-09-18 Procédé et dispositif pour éviter un manque de parallélisme de profilés

Country Status (5)

Country Link
US (1) US5792418A (fr)
EP (1) EP0707903B1 (fr)
CN (1) CN1063988C (fr)
DE (2) DE4438822A1 (fr)
TW (1) TW283100B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101767113B (zh) * 2009-12-22 2012-09-05 马鞍山钢铁股份有限公司 热轧h型钢轧后控制冷却装置
CN102773271B (zh) * 2012-06-12 2014-12-31 莱芜钢铁集团有限公司 一种热轧h型钢均温装置及均温方法
CN103357675B (zh) * 2013-06-28 2016-06-29 中冶南方工程技术有限公司 热轧h型钢冷床气雾冷却方法及其装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2378044A (en) * 1943-05-17 1945-06-12 Ford Motor Co Armor plate quenching
US3151197A (en) * 1962-12-05 1964-09-29 United States Steel Corp Apparatus for quenching rolled products
DE1452106A1 (de) * 1964-04-22 1969-05-08 United Eng Foundry Co Vorrichtung zur partiellen Kuehlung von Breitflanschtraegern in Traegertaschen
US3738629A (en) * 1971-03-04 1973-06-12 Dorn Co V Bar quench fixture
BE837884A (fr) * 1976-01-23 1976-05-14 Centre Rech Metallurgique Perfectionnements aux dispositifs de refroidissement des profiles metalliques
US4149703A (en) * 1978-01-31 1979-04-17 Drever Company Apparatus for quenching a heated metal plate
JPS5848019B2 (ja) * 1979-11-09 1983-10-26 石川島播磨重工業株式会社 鋼板の噴霧冷却方法及びその装置
US4318534A (en) * 1980-10-09 1982-03-09 Midland-Ross Corporation Plate quench
JPS6037857B2 (ja) * 1981-11-28 1985-08-28 川崎製鉄株式会社 残留応力の少ないｈ形鋼の製造方法
CA1193176A (fr) * 1982-07-06 1985-09-10 Robert J. Ackert Methode de production de rails de chemin de fer de meilleure qualite par refroidissement accelere a la sortie du laminoir
BE899845A (fr) * 1984-06-06 1984-10-01 Centre Rech Metallurgique Procede pour ameliorer la rectitude d'une palplanche.
JPS6254519A (ja) * 1985-09-03 1987-03-10 Kawasaki Steel Corp Ｈ形鋼の製造方法
JPS6462209A (en) * 1987-08-31 1989-03-08 Nippon Kokan Kk Manufacture of high strength unequal side and unequal thickness steel shape
DD288990A5 (de) * 1989-11-16 1991-04-18 ���@������������������`����Kk�� Vorrichtung zur partiellen kuehlung zum thermischen richten von gewalzten sonderprofilen
JPH04279211A (ja) * 1991-03-05 1992-10-05 Nippon Steel Corp Ｈ形鋼上面の水切り方法および装置
FR2675718A1 (fr) * 1991-04-29 1992-10-30 Bertin & Cie Procede et dispositif de refroidissement d'un profile en cours de laminage.
US5284327A (en) * 1992-04-29 1994-02-08 Aluminum Company Of America Extrusion quenching apparatus and related method
JP3241444B2 (ja) * 1992-08-10 2001-12-25 川崎製鉄株式会社 靱性・強度に富んだｈ形鋼の製造方法

Also Published As

Publication number Publication date
US5792418A (en) 1998-08-11
DE4438822A1 (de) 1996-04-25
EP0707903A3 (fr) 1997-05-02
CN1063988C (zh) 2001-04-04
EP0707903A2 (fr) 1996-04-24
TW283100B (fr) 1996-08-11
DE59509444D1 (de) 2001-08-30
CN1120980A (zh) 1996-04-24

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