EP0707903A2 - 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
EP0707903A2
EP0707903A2 EP95250227A EP95250227A EP0707903A2 EP 0707903 A2 EP0707903 A2 EP 0707903A2 EP 95250227 A EP95250227 A EP 95250227A EP 95250227 A EP95250227 A EP 95250227A EP 0707903 A2 EP0707903 A2 EP 0707903A2
Authority
EP
European Patent Office
Prior art keywords
coolant
nozzles
web
rolling
carrier
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
EP95250227A
Other languages
German (de)
English (en)
Other versions
EP0707903A3 (fr
EP0707903B1 (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
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 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 for carrying out the method for avoiding the non-parallelism of the carrier profiles that occurs when rolling carriers on universal carrier lines by partially applying coolant to the carriers.
  • twisting of the parallel flanges is often observed after leaving the finishing stand, which is referred to as non-parallelism in the DIN standard and as a wide top in English.
  • the twisting of the beam profiles during cooling is characterized by a widening of the upper and a contraction of the lower flange halves and represents a general problem.
  • the non-parallelism of the flanges in the downstream straightening machines can be eliminated if the beam is introduced into these machines is possible.
  • Cooling devices preferably behind the carrier line and to use them to influence the structure after the rolling process. Cooling units are also known, with which partial cooling of the flanges can be carried out during the rolling process in order to influence the transition area between the web and flange with regard to the structural properties of the finished product (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. Spraying devices in front of carrier lines are also known which serve to remove the adhering scale. The resulting cooling effect is undesirable.
  • the object of the present invention is, based on the problems and disadvantages of the prior art described above, to provide a method and an apparatus for carrying out the method, with which the non-parallelism and the warping of the carrier during rolling in universal roll stands are prevented.
  • the coolant for setting an approximately symmetrical temperature profile in the web is applied to the underside of the web during the rolling process.
  • 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 a low temperature gradient above the Has web thickness, so it can be achieved that the flanges remain parallel during the subsequent cooling process.
  • the cooling intensity is preferably regulated by regulating the quantity of coolant and / or loading density as a function of the temperature measured on the top and bottom of the web and the temperature difference calculated therefrom.
  • the surface temperatures on the top and bottom of the web are recorded with a measuring device and fed to a computer system, which continuously determines the temperature distribution in the rolling stock and uses this to determine the point in time at which the coolant was switched on and the density of water required in each pass.
  • a device for carrying out the method according to claims 1 and 2 is characterized in that coolant nozzles are arranged in or in the immediate vicinity of at least one universal roll stand in the region of the underside of the web of the carrier.
  • the arrangement of these nozzles allows the underside of the web to be cooled in one or more passes during the rolling process, thus avoiding excessive cooling after exiting the finishing stand, which can lead to cracks and warpage.
  • the continuous cooling via the coolant nozzles enables a targeted control of the uniformity of the temperature profile, which cannot be achieved by cooling after the rolling process and the large temperature gradients associated therewith within the web.
  • the coolant nozzles are preferably arranged in the region of the reversing roll stands.
  • the coolant nozzles are conveniently arranged at several points within the line.
  • the individual coolant nozzles can be switched on and off separately, both the width of the cooling surface and the coolant exposure 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, which can be aligned with the carrier profile with a rotatable adjustment.
  • the focus is not on the structural influence with the corresponding metallurgical properties, but rather on the targeted maintenance of an approximately symmetrical temperature profile in the web with the resulting parallelism of the flanges. This is brought about in a simple manner with the measures of the invention, so that on the one hand better product quality can be achieved and on the other hand the reworking and the effort with the straightening machines can be minimized.
  • FIG 1 three spray bars 1, 2, 3 are shown, which are connected via a gate valve 4 to a water pipe 5, which is also provided with a gate valve 6.
  • spray nozzles 8 are in each case laterally offset and inclined to the rolling direction 7, in each case in a different lateral position to the rolling direction 7.
  • a coolant bar 1 is shown schematically below the roller table levels 9 in front of a universal roll stand indicated at 10. It can be seen from FIG. 2 that the coolant nozzles 8 are inclined towards the rolling direction 7 and that the coolant flow is thus applied to the underside of the web in a direction opposite to the rolling direction.
  • the arrangement of two coolant nozzles 8 on the spray bar 1 designed as a tube is shown in FIG.
  • the nozzle slots 11 can be rotated (shown on the left in FIG. 3), so that the width and the coverage of the individual coolant jets can be adapted to the chamber width of the carrier. From view A (right half of FIG. 3) it can be seen that the coolant nozzles are offset from one another on the spray bar (water supply pipe) 1 and direct the coolant onto the carrier at different angles ⁇ and ⁇ . As a result, the largest possible coolant application area is set on the carrier and an intensive cooling effect is thus achieved.
  • FIGS. 4 to 6 show beams 12, 13 and 14 of different widths in cross section.
  • three pairs of coolant nozzles with coolant nozzles 8 are used; this corresponds to the arrangement of the spray bar 3 in FIG. 1.
  • a medium-width carrier 14 is sprayed on with two pairs of coolant nozzles, which corresponds to the spray bar 2 in FIG. 1.
  • flat jet nozzles with rotatable adjustment are used, which enable the most favorable adaptation to the width of the respective web 15.
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 true EP0707903A2 (fr) 1996-04-24
EP0707903A3 EP0707903A3 (fr) 1997-05-02
EP0707903B1 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1452106A1 (de) 1964-04-22 1969-05-08 United Eng Foundry Co Vorrichtung zur partiellen Kuehlung von Breitflanschtraegern in Traegertaschen
DE4009707A1 (de) 1989-11-16 1991-05-23 Thaelmann Schwermaschbau Veb Vorrichtung zur partiellen kuehlung zum thermischen richten von gewalzten sonderprofilen

Family Cites Families (16)

* 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
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
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1452106A1 (de) 1964-04-22 1969-05-08 United Eng Foundry Co Vorrichtung zur partiellen Kuehlung von Breitflanschtraegern in Traegertaschen
DE4009707A1 (de) 1989-11-16 1991-05-23 Thaelmann Schwermaschbau Veb Vorrichtung zur partiellen kuehlung zum thermischen richten von gewalzten sonderprofilen

Also Published As

Publication number Publication date
EP0707903A3 (fr) 1997-05-02
CN1120980A (zh) 1996-04-24
CN1063988C (zh) 2001-04-04
DE4438822A1 (de) 1996-04-25
US5792418A (en) 1998-08-11
DE59509444D1 (de) 2001-08-30
TW283100B (fr) 1996-08-11
EP0707903B1 (fr) 2001-07-25

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