EP0426561A1 - Installation de réchauffage et de laminage de produits longs - Google Patents

Installation de réchauffage et de laminage de produits longs Download PDF

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Publication number
EP0426561A1
EP0426561A1 EP90403075A EP90403075A EP0426561A1 EP 0426561 A1 EP0426561 A1 EP 0426561A1 EP 90403075 A EP90403075 A EP 90403075A EP 90403075 A EP90403075 A EP 90403075A EP 0426561 A1 EP0426561 A1 EP 0426561A1
Authority
EP
European Patent Office
Prior art keywords
rolling mill
products
axis
reheating
installation according
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Withdrawn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
EP90403075A
Other languages
German (de)
English (en)
French (fr)
Inventor
Philippe Mingasson
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.)
Fives Stein SA
Original Assignee
Stein Heurtey SA
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 Stein Heurtey SA filed Critical Stein Heurtey SA
Publication of EP0426561A1 publication Critical patent/EP0426561A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B1/026—Rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand
    • 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
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/004—Transverse moving

Definitions

  • the present invention relates to an installation for reheating and rolling long metallurgical products such as in particular billets and the like.
  • This invention applies more particularly to a furnace for reheating long products, in particular billets which feeds a rolling mill whose first cage is located in the immediate vicinity of this reheating furnace.
  • the long product must undergo a prior rolling phase, for example in a cage of a roughing rolling mill before passing into the main rolling mill.
  • it is therefore necessary to carry out special installations or to modify existing installations in order to install an additional rolling mill cage there between the outlet of the reheating furnace and the main rolling mill, placed in the immediate vicinity of this furnace.
  • This modification proves difficult, if not impossible, especially when the space available does not allow the mounting of an additional rolling mill in the axis of the existing rolling mill.
  • the present invention proposes to provide an installation offering this possibility by making it possible to unload a furnace for reheating long products, such as in particular billets, to two separate rolling mills which can be arranged along different axes, possibly with transfer. products such as billets through the reheating furnace, from one rolling axis to the other.
  • the subject of this invention is an installation for reheating and rolling long metallurgical products, such as in particular billets comprising a main rolling mill, characterized in that it comprises: - A reheating furnace provided with at least one outlet leading to means for transferring the products to an additional rolling mill, in particular a roughing rolling mill; - lateral discharge means for extracting the products from the reheating furnace through said outlet along a determined axis and for bringing them to transfer means.
  • a second rolling mill, or additional rolling mill such as in particular a roughing rolling mill receiving the products such as billets delivered by said transfer means and; - Means receiving the products leaving the roughing mill in order to deliver them to the main rolling mill, along a second axis parallel to the axis of unloading.
  • the reheating furnace is provided with two lateral outlets: the first outlet opening directly onto the main rolling mill, placed in the immediate vicinity of the oven and the second outlet opening onto said means for transferring products to the additional rolling mill, second lateral discharge means are provided for extracting the products from the reheating furnace and for transferring them directly to said principal rolling mill through said first outlet, along the axis of this principal rolling mill, parallel to the axis of discharging towards said additional rolling mill and provision is also made for re-feeding receiving the products leaving the roughing-up rolling mill in order to reintroduce them into the furnace through an opening of low height, these products then being taken up by the second lateral unloading means at the end of being delivered to the main rolling mill along the axis of the latter er.
  • the re-charging means which receive the products leaving the roughing-up mill in order to reintroduce them into the oven constitute re-charging means.
  • front and the low height opening in the oven for the reintroduction of products is a front opening.
  • re-charging in the oven is carried out laterally, a train of re-charging rollers then being integrated into the oven.
  • the means for lateral discharge towards the main rolling mill and / or towards the additional rolling mill can be produced in the form of a gripper machine pulling the products, or of a push bar, with or without the 'top up with a pinch roller or a combination of these means.
  • the front re-charging in the reheating furnace of the products leaving the second rolling mill or roughing rolling mill can be carried out using a pusher, a mechanical system with rectangular movements, or on a train of movable rollers or using a gripper machine. These same machines can be used for the transfer from the re-charging axis to the axis of the main rolling mill in the case of the variant with re-charging rolls.
  • the length of the re-charging zone can be greater than the width of the reheating oven, in order to take account of the elongation of the product resulting from its passage through the second rolling stand or roughing stand.
  • the products leaving the oven are removed by the discharge means directly to said additional rolling mill or roughing rolling mill, along a first axis, for example using a roller table, then they are transferred, after roughing, to the main rolling mill, along the axis of the latter by means of a roller table which can be inside the oven, or mounted in the immediate vicinity of the oven enclosure and optionally covered.
  • FIG. 1 a furnace for reheating long products such as billets, generally designated by the reference 10. It is a conventional reheating furnace on the sole of which are routed the billets to be reheated and for this reason this oven will not be described in detail.
  • the reheating furnace 10 is provided with two lateral outlets 12, 16 arranged in opposite side parts, each of these outlets being provided with means conventional shutters not shown in the drawing.
  • the outlet 12 of the reheating furnace 10 leads directly to a rolling mill called here the main rolling mill and the first stand of which has been shown at 14 in FIG. 1, this rolling mill 14 being placed in the immediate vicinity of the outlet 12.
  • the second lateral outlet 16 leads to means for discharging and transferring long products to a second rolling mill 20, which may for example be a roughing rolling mill.
  • These charging and transfer means are designated as a whole in FIG. 1 by the reference 18 and they will be described below in detail.
  • the installation also comprises first lateral discharge means 26 making it possible to transfer a billet B from the furnace 10 to the rolling mill 14 through the first outlet 12 and along a first axis aa and second lateral discharge means 24 making it possible to extract a billet such as B from the reheating furnace 10, through the second outlet 16 and along a second axis bb to deliver it to the transfer means 18.
  • the installation includes re-charging means, which in this first embodiment provide front re-charging and which are designated as a whole by the reference 22. These means are designed so as to reintroduce into the oven 10, according to the first axis aa a billet B leaving the second rolling mill 20, for example a roughing rolling mill.
  • the lateral discharge of products such as billets B is carried out using a pushing or tacky bar 26 moving the billets along the axis aa in order to deliver them to the rolling mill 14 through the first outlet 12.
  • This push bar 26 may optionally further include a pinch roller. It is of course possible to use any other means, in particular a clamp machine pulling the product through the outlet 12 of the oven.
  • the lateral discharge of the products through the second outlet 16, along the second axis bb, is preferably carried out by traction using a gripper machine 24 or by pushing by a push bar with the possible addition of '' a pinch roller.
  • the means 18 for transferring the billets B from the furnace 10 to the roughing rolling mill 20 may for example include: - A first roller table 28 disposed along the second axis bb, receiving the billets extracted from the oven through the second outlet 16 by the charging means 24; - A second roller table 30 arranged along the axis cc of the second rolling mill 20 for delivering the billets to the rolling mill 20 and; a mechanism of known type designated by the reference 32 making it possible to pass each billet from the roller table 28 to the roller table 30 for then delivering this billet to the second rolling mill 20 and then to the re-charging means 22, after rolling, for example roughing.
  • re-charging means are for example in the form of a roller table 32, of axis cc, possibly on a movable frame receiving the billets having undergone rolling in the second rolling mill 20 and a transfer and reintroduction means of these billets in the reheating furnace 10 along the first axis aa.
  • the means for transferring the billets B from the axis cc to the axis aa in the reheating furnace 10 can be produced in the form of a pusher, a finger machine, a mechanical system with rectangular movements, of a movable frame supporting the rollers 32 or using a gripper machine, passing through the front wall of the oven.
  • This latter embodiment has the advantage of making it possible to deposit a billet on any axis and, in particular behind the preceding billet during rolling in the rolling mill 20.
  • the re-charging of the billets in the furnace 10, by means 22 s' performs through a front opening of low height 31 ( Figure 3) provided in the oven, this opening being provided with a door, as seen in the drawing.
  • the re-charging into the oven 10 takes place laterally through an opening 34 of low height, the train of re-charging rollers 32 ′ Then being integrated into the oven 10 as can be clearly seen in these figures.
  • This second embodiment has the advantage of making it possible to increase the space available in waiting area, inside the oven.
  • the enclosure of the oven 10 is enlarged on the discharge side so as to cover the train of rollers 32 ′ which receives the billets B after their passage in the roughing rolling mill 20.
  • re-charging in the oven takes place laterally through the opening 34 and, of course, the billets are moved from the axis cc of the train of rollers 32 ′ to the axis aa of the main rolling by one any of the means mentioned and / or described above: pushing machine, finger machine, movable chassis for supporting the rollers, gripper machine, passing through the front wall of the oven 10 through an opening 36 provided for this purpose (see FIG. 5) .
  • the length of the re-charging area that is to say the length of the space occupied by the re-charging means 22 is preferably greater than the width of the reheating oven 10 (as shown in the drawing), so as to take account of the elongation of the product or billet B resulting from its passage through the rolling mill 20.
  • the installation according to the present invention makes it possible to place an additional rolling mill, such as the roughing rolling mill 20 between the outlet of the product reheating oven and the main rolling mill 14, outside of the axis of this main rolling mill (axis aa in FIG. 1) the products such as the billets B, heated in the oven 10 being discharged along the axis bb by the discharging system 24 before having reached the axis aa from the main rolling mill 14, these billets then being transferred using the transfer means 18 to the additional rolling mill 20 where they undergo a first rolling, for example roughing, before being brought back by re-charging means 22 into the oven heating 10, along the axis aa, to then be rolled by the main cage 14.
  • an additional rolling mill such as the roughing rolling mill 20 between the outlet of the product reheating oven and the main rolling mill 14
  • This same installation also allows direct feeding of the main rolling mill 14, without passing through the rolling mill 20.
  • the billets are directly evacuated from the furnace by the discharge means 26, along the axis aa, through the first outlet 12.
  • products such as billets B undergo the following operations, in the case of two successive rolling operations carried out respectively on the rolling mill 20 (for example roughing) and then on the main rolling mill 14: - a lateral discharge through the outlet 16, along the axis bb, on the side opposite to the main rolling mill 14; a transfer to the axis cc of the first rolling mill 20 (for example roughing rolling mill); - a rolling, for example roughing, along the axis cc, on the rolling mill 20; - Reloading in the reheating oven 10 using re-charging means 22, along the axis aa, through a front opening of small height provided in the oven 10; - a lateral evacuation of the oven 10 through the outlet 12, along the main axis aa and; a rolling along the axis aa on the rolling mill 14.
  • the additional rolling mill such as the roughing rolling mill 20 can be installed along the axis b-b.
  • the long products such as the billets B are laminated immediately after their exit from the reheating furnace 10, through the exit 16 and along the axis b-b, progressively as they are discharged and then they are transferred to the cc axis as described above and finally reintroduced into the reheating furnace along the aa axis, using re-charging means 22 to be finally rolled by the main rolling mill 14 along the aa axis .
  • the products leaving the reheating furnace 10 are discharged directly along an axis b′-b ′, by the discharge means, towards the additional rolling mill or roughing rolling mill 20, placed in the immediate vicinity of the lateral opening 16 of the furnace, then they are transferred directly after roughing to the main rolling mill 14 to one or more veins, along the axis a′-a ′, without being reintroduced into the oven 10.
  • the products are brought to the roughing rolling mill 20 using a roller table 37 and by one of the feeding means described above by way of example, then they are transferred from a roller table 38, placed at the outlet of the additional rolling mill 20, to a second roller table 40, of axis a′-a ′, to be finally delivered to the main rolling mill 14.
  • the roller table 40 can be double as shown in FIG. 8. It then has two parallel sections 40, 40 ′, which makes it possible to carry out a transfer and an evacuation of the products on two independent rows respectively of axes a′1- a′1 and a′2-a′2, parallel to the axis b′-b ′ along which the products are removed from the reheating furnace 10, the front wall of which is shown in the drawing at 39.
  • roller tables are used having the configuration shown in FIGS. 11 to 13. It can be seen that these roller tables include rollers 42 with shoulders alternating 42 ′, 42 ⁇ . This arrangement makes it possible to carry out independent handling of products B on several rows, in a reduced space, all of the driving parts such as 44, both rollers of the unloading table 37 and rollers of the transfer tables 40 then being reported outside the size of these roller tables.
  • the main advantage of this variant of the installation according to the invention is that the deflection axis b′-b ′ towards the roughing rolling mill 20 remains in close proximity to the axis a′-a ′ of the main rolling mill, this which provides the maximum length of the oven.
  • the installation according to the present invention there may be mentioned in particular: - the possibility of installing a roughing rolling mill upstream of an existing rolling mill, even when the space available does not allow the mounting of this roughing rolling mill in the axis of the existing rolling mill; - the possibility of using a coarse rolling mill of the monoveine type whatever the type of the main rolling mill; - the possibility of reloading the products in the oven, along any axis, by means of a re-charging machine and thus feeding a multi-line rolling mill; - the possibility of directly discharging the products along the axis of the rolling mill in accordance with the conventional procedure; - the possibility of retaining an existing tacky nerdy to push the billets along the main rolling axis (or axes); - a reduction in heat losses between the rolling mills; - The possibility of keeping in the oven the products leaving the roughing mill awaiting their passage through the main rolling mill.
  • the length of the waiting zone can be greater than the width of the oven as shown in the embodiment illustrated by the drawing; - The possibility of having as long a useful heating length in the oven as possible, since the axis of product discharge to the roughing mill is immediately close to the axis of the main rolling mill. - the possibility of heating the billets after the roughing rolling mill and before the main rolling mill and more particularly of ensuring the heating of the product in two distinct stages in order to obtain particular metallurgical characteristics: . a first step, from charging into the existing oven to charging to the additional rolling mill, at a temperature avoiding decarburization of the products; . a second step, from re-charging to charging to the main rolling mill, at the temperature required by this main rolling mill.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
EP90403075A 1989-11-03 1990-10-30 Installation de réchauffage et de laminage de produits longs Withdrawn EP0426561A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8914441A FR2654022B1 (fr) 1989-11-03 1989-11-03 Installation de rechauffage et de laminage de produits longs.
FR8914441 1989-11-03

Publications (1)

Publication Number Publication Date
EP0426561A1 true EP0426561A1 (fr) 1991-05-08

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ID=9387065

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EP90403075A Withdrawn EP0426561A1 (fr) 1989-11-03 1990-10-30 Installation de réchauffage et de laminage de produits longs

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EP (1) EP0426561A1 (el)
DE (1) DE426561T1 (el)
ES (1) ES2022076A4 (el)
FR (1) FR2654022B1 (el)
GR (1) GR910300080T1 (el)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917915A2 (en) * 1997-11-24 1999-05-26 Morgan Construction Company Apparatus for and method of processing billets in a rolling mill

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236666A2 (de) * 1986-01-16 1987-09-16 Sms Schloemann-Siemag Aktiengesellschaft Arbeitsverfahren zum Aufheizen von in Stranggusseinrichtungen gegossenen oder in Umformeinrichtungen umgeformten Halbzeugen für deren Einbringen in Umform- und/oder Weiterverarbeitungseinrichtungen
EP0302257A1 (en) * 1987-08-05 1989-02-08 DANIELI & C. OFFICINE MECCANICHE S.p.A. Equalization furnace for continuously cast billets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236666A2 (de) * 1986-01-16 1987-09-16 Sms Schloemann-Siemag Aktiengesellschaft Arbeitsverfahren zum Aufheizen von in Stranggusseinrichtungen gegossenen oder in Umformeinrichtungen umgeformten Halbzeugen für deren Einbringen in Umform- und/oder Weiterverarbeitungseinrichtungen
EP0302257A1 (en) * 1987-08-05 1989-02-08 DANIELI & C. OFFICINE MECCANICHE S.p.A. Equalization furnace for continuously cast billets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IRON AND STEEL, vol. 44, no. 4, août 1971, pages 231-241; W.R. LAWS: "The reheating of slabs prior to rolling" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917915A2 (en) * 1997-11-24 1999-05-26 Morgan Construction Company Apparatus for and method of processing billets in a rolling mill
EP0917915A3 (en) * 1997-11-24 2002-11-13 Morgan Construction Company Apparatus for and method of processing billets in a rolling mill

Also Published As

Publication number Publication date
GR910300080T1 (en) 1991-12-10
DE426561T1 (de) 1991-10-17
ES2022076A4 (es) 1991-12-01
FR2654022B1 (fr) 1992-01-24
FR2654022A1 (fr) 1991-05-10

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