EP0630696B1 - Procédé et dispositif pour le refroidissement soigné de barres d'acier spécial ou inoxydable laminées à chaud - Google Patents

Procédé et dispositif pour le refroidissement soigné de barres d'acier spécial ou inoxydable laminées à chaud Download PDF

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Publication number
EP0630696B1
EP0630696B1 EP94109154A EP94109154A EP0630696B1 EP 0630696 B1 EP0630696 B1 EP 0630696B1 EP 94109154 A EP94109154 A EP 94109154A EP 94109154 A EP94109154 A EP 94109154A EP 0630696 B1 EP0630696 B1 EP 0630696B1
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EP
European Patent Office
Prior art keywords
lengths
bars
cooling
cooling bed
bed
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
EP94109154A
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German (de)
English (en)
Other versions
EP0630696A1 (fr
Inventor
Hans-Peter Drügh
Rolf Stodt
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 Schloemann Siemag AG
Schloemann Siemag AG
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Publication date
Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0630696A1 publication Critical patent/EP0630696A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed

Definitions

  • the invention relates to a method and a device for gentle cooling of hot-rolled special and stainless steels, which are divided into partial lengths following a rolling mill and braked by an upstream channel in the material flow upstream of a cooling bed.
  • the rolling stock After rolling out in the rolling or finishing train, the rolling stock is usually divided into as long as possible partial lengths of, for example, 70 to 120 m by a cooling bed shear and then braked to a standstill with known braking means in or from the run-up trough; the partial lengths of the bars or profiles are then raised to the rhythm of the downstream cooling bed, which is usually designed as a computing cooling bed, or they slide in a known manner onto the first catch of the cooling bed.
  • the partial lengths remain there with long or increased cooling until they have reached a temperature of approx. 100 to 250 ° C.
  • the rolling stock In order to prevent or reduce or avoid the formation of cracks or the expensive afterglow, attempts have been made to transport the rolling stock transversely more quickly by operating a conventional cooling bed more quickly. In order to achieve a less rapid cooling and a correspondingly higher final temperature for the rolling stock, the rolling stock is cross-conveyed with larger or faster transport steps, which can be achieved by optionally incrementable cycle steps or additional fast transport chains integrated or built into the cooling bed.
  • a transition device arranged between the rake cooling bed and the downstream discharge or removal roller table for loading a cooling bed shear with successive bars or groups of bars of different numbers and dimensions consists of a plurality of continuous, rake teeth having the bars or the bar groups taking over and releasing them -Chain conveyors that have speed-changeable and / or step-switchable drives.
  • a lifting table which is movable in and against their transport direction and between the rollers of the roller table is provided.
  • the finishing line has an overrun and braking system for long bars separated on the cooling bed shears; This system is followed by a bar stack collector and a longitudinal conveyor, which is provided with a driver and a flying hot cutting device for finished lengths and transports the bar layers away.
  • Various thermal treatment devices are integrated into the material flow of the long bars, such as annealing furnaces or continuous furnaces and cooling chambers.
  • the invention has for its object to provide a method and an apparatus of the type mentioned, which make it possible to use the material flow behind a finishing or rolling train on the one hand, and on the other hand, material qualities that are prone to cracking and cooling more quickly than those passed over the cooling bed Remove rods.
  • the bars are subdivided into shorter bar lengths than the usual partial lengths, combined to form tight bar layers in addition to the run-up trough and transferred in layers to a cross conveyor operated at a high transport speed and connected to a run-off roller table and in the course of the removal the roller table is cut into commercial lengths and then stored in insulated warming containers.
  • the road performance i.e. the rolling speed when rolling out high-quality material is reduced in order to avoid disadvantageous structural changes.
  • the lower rolling speeds reduce the braking distance of the bars in the run-up channel in front of the cooling bed, the length of which is designed depending on the maximum rolling speed of the rolling mill.
  • the bar lengths which are significantly shorter than in normal operation, enable a correspondingly faster division both before entering the run-off channel and after cross-conveying when separating the commercial lengths on the roller table, and also that the short bar lengths according to the invention have significantly shorter running times a larger layer width, which can also be achieved close to each other in a heat-efficient manner.
  • various measures that ensure a higher temperature level can be linked with one another and the advantages resulting from the individual measures can be exploited to maintain the desired high residual temperature despite the indispensable process steps such as parts, braking, cross-conveying, conveying and lowering in commercial lengths, to enable the high-quality special and stainless steels to cool down gently.
  • a cross conveyor designed as a warm bed which can advantageously consist of endless chains or alternatively of trolleys, is arranged next to the run-on channel.
  • a warm bed which precedes the cooling bed is, without having to increase the overall length of the system, understood that this is not subject to the usual ventilation in a cooling bed, but rather can be in a closed, encapsulated construction.
  • This design helps to achieve the desired high residual temperature of the bars when the bars are being transported quickly across them.
  • temperature losses cannot be avoided for this reason alone because of the ventilation that is inevitable there and is also required for the normal rolling program.
  • a collecting slide is arranged between the run-on trough and the cross conveyor, on which the close-lying bar layers are formed before they are transferred to the cross conveyor.
  • other devices comparable to the rod lengths to form rod packages or layers can be used.
  • a rolling mill 1 is followed by an overrun roller table 2 with parting shears 3 integrated therein for dividing the rolling strand into partial lengths, which during normal rolling operation depend on the length dimensions of a downstream cooling bed 4 designed as a computing cooling bed and on the cooling bed cycle dependent dependent minimum or maximum dimensions of the partial lengths.
  • the partial lengths of the hot-rolled bars separated by the scissors 3 are braked before they are transported transversely to the roller table 5 connected to the cooling bed 4.
  • the cooling bed 4 is preceded by a warm bed 13 which has a cross conveyor 11 in the form of endless chains 12 between the run-up roller table 2 and the run-off roller table 5.
  • the endless chains 12 can be driven at a high transport speed, and when rolling high-quality, alloyed steel grades they take over the transverse transport of the part lengths separated in this case from the shear 3 much shorter than normal.
  • the short partial lengths are namely braked before reaching the cooling bed 4, summarized there on a collecting chute 14 into stacked layers and then conveyed in layers or packages for delivery to the roller table 5.
  • the warm bed 13 is integrated into the material flow without increasing the overall length of the system, because it is located next to the run-down channel 6 which is required anyway in normal operation for feeding the cooling bed 4 and brakes the bar lengths.
  • the sum of the speed-dependent braking distance and the short bar length during rolling high-quality, alloyed steel grades can then be equated to the braking distance required in normal operation with correspondingly much longer partial lengths for maximum rolling speeds.
  • the short rod lengths mean short run times, and their layer-by-layer collection with close-lying rods ensures a heat storage effect.
  • the rod groups can then be transported quickly via the im without any harmful temperature losses transversely convey essential warm bed 13 not subject to ventilation influences.
  • the short rod lengths then run into a cut-off machine 15 via the roller table 5, where, owing to their short dimensions, they can be divided into the desired commercial lengths with only a few slicing cuts and thus without unnecessary cooling times, before they are then stored in the insulated holding containers 16 provided .

Claims (5)

  1. Procédé pour le refroidissement ménagé d'aciers spéciaux et précieux laminés à chaud en barres, qui sont divisées en sections partielles consécutivement à un train de laminage (1) et qui sont freinées par un chenal (6) disposé devant un lit de refroidissement (4) dans le flux de matière, caractérisé en ce que les barres sont divisées, comme les sections partielles usuelles, en sections plus petites, en ce qu'elles sont rassemblées à côté du chenal (6) en couches de barres compactes et en ce qu'elles sont transvasées par couches dans un transporteur transversal (11) fonctionnant à une vitesse de transport élevée et relié à un train de rouleaux (2) et en ce qu'elles sont coupées, dans le prolongement de l'évacuation sur le train de rouleaux (2), en longueurs commerciales et en ce qu'elles sont ensuite stockées dans un récipient isolé gardant la chaleur.
  2. Dispositif pour la réalisation du procédé selon la revendication 1, constitué par une unité de séparation (3) disposée après le train de laminage (1) à laquelle se raccordent un chenal (6) et un lit de refroidissement (4), caractérisé en ce qu'on dispose à côté du chenal (6) un transporteur transversal (11) exécuté sous forme d'un lit chauffant (13).
  3. Dispositif selon la revendication 2, caractérisé par la chaîne sans fin (12) formant le transport transversal (11).
  4. Dispositif selon la revendication 2, caracterisé par le chariot de transport formant le transporteur transversal (11).
  5. Dispositif selon une quelconque des revendications 2 à 4, caractérisé en ce qu'on a disposé un couloir de collecte (14) entre le chenal (6) et le transporteur transversal (11).
EP94109154A 1993-06-23 1994-06-15 Procédé et dispositif pour le refroidissement soigné de barres d'acier spécial ou inoxydable laminées à chaud Expired - Lifetime EP0630696B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4320736A DE4320736A1 (de) 1993-06-23 1993-06-23 Verfahren und Vorrichtung zum schonenden Abkühlen von zu Stäben warmgewalzten Spezial- und Edelstählen
DE4320736 1993-06-23

Publications (2)

Publication Number Publication Date
EP0630696A1 EP0630696A1 (fr) 1994-12-28
EP0630696B1 true EP0630696B1 (fr) 1997-09-10

Family

ID=6490960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109154A Expired - Lifetime EP0630696B1 (fr) 1993-06-23 1994-06-15 Procédé et dispositif pour le refroidissement soigné de barres d'acier spécial ou inoxydable laminées à chaud

Country Status (6)

Country Link
EP (1) EP0630696B1 (fr)
JP (1) JPH0780533A (fr)
KR (1) KR100190343B1 (fr)
AT (1) ATE157913T1 (fr)
DE (2) DE4320736A1 (fr)
TW (1) TW267956B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418917A1 (de) * 1994-05-31 1995-12-07 Schloemann Siemag Ag Verfahren und Vorrichtung zum Abtrennen und kontrollierten Abkühlen von Einzelstäben aus einem Walzprofil
CN109454116B (zh) * 2018-11-06 2020-03-27 陕钢集团汉中钢铁有限责任公司 一种冷床输入辊道速度的控制方法
CN112246866B (zh) * 2020-09-16 2022-12-09 上海新联金属新材料有限公司 一种下肖型钢热轧生产线及该生产线的生产方法
CN114309093B (zh) * 2021-12-30 2023-07-25 重庆钢铁股份有限公司 板材上下冷床的方法、板材编码方法及板材编码辅助装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1962586A (en) * 1932-04-08 1934-06-12 Schloemann Ag Rolling mill
DE2120279A1 (de) * 1970-08-26 1972-03-02 Thaelmann Schwermaschbau Veb Verfahren und Einrichtung zum wechselseitigen Übergeben von Walz stäben, insbesondere bei Edelstahlen
US4068516A (en) * 1976-11-18 1978-01-17 Firma Friedrich Kocks Method and apparatus for handling bar-shaped material
JPH0626728B2 (ja) * 1986-11-13 1994-04-13 株式会社神戸製鋼所 圧延材の精整装置
DD268178A1 (de) * 1988-01-07 1989-05-24 Thaelmann Schwermaschbau Veb Anlage zum adjustieren von sehr harten staehlen und sonderwerkstoffen
DE3818242A1 (de) * 1988-05-28 1989-12-07 Schloemann Siemag Ag Uebergabeeinrichtung zwischen einem rechenkuehlbett und nachgeordnetem abfuehrrollgang

Also Published As

Publication number Publication date
EP0630696A1 (fr) 1994-12-28
DE59404004D1 (de) 1997-10-16
KR950000234A (ko) 1995-01-03
KR100190343B1 (ko) 1999-06-01
ATE157913T1 (de) 1997-09-15
TW267956B (fr) 1996-01-11
DE4320736A1 (de) 1995-01-05
JPH0780533A (ja) 1995-03-28

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