EP0614714A1 - Machine pour la coulée continue de brames minces en acier - Google Patents

Machine pour la coulée continue de brames minces en acier Download PDF

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Publication number
EP0614714A1
EP0614714A1 EP94102619A EP94102619A EP0614714A1 EP 0614714 A1 EP0614714 A1 EP 0614714A1 EP 94102619 A EP94102619 A EP 94102619A EP 94102619 A EP94102619 A EP 94102619A EP 0614714 A1 EP0614714 A1 EP 0614714A1
Authority
EP
European Patent Office
Prior art keywords
bearings
casting machine
continuous casting
mold
csp
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Withdrawn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
EP94102619A
Other languages
German (de)
English (en)
Inventor
Peter Boese
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
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 Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0614714A1 publication Critical patent/EP0614714A1/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Withdrawn legal-status Critical Current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
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408—Moulds for casting thin slabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction

Definitions

  • the invention relates to a CSP continuous casting machine for the continuous production of thin slabs of steel, with a funnel-shaped CSP mold designed for stress-free solidification of the cast strand, the outlet opening of which is assigned a pair of pinch rollers, the pinch rollers having bearings that can be adjusted in a horizontal plane by means of hydraulic adjusting devices, and squeeze the frozen shells of the cast strand together.
  • a CSP casting machine for continuous hot strip production is described in a public publication by the applicant entitled "Nucor Steel CSP Plant in Crawfordsville", No: 2500/1/92 LD.
  • thin slabs with a thickness of 40 or 50 mm and a width of 900 to 1350 mm are continuously cast and rolled into hot strip in the subsequent rolling mill.
  • the basic structure of the CSP casting machine corresponds to that of a conventional continuous casting plant. Due to the reduced casting thickness, the strand guide is shorter and much smaller.
  • Liquid steel is poured into the mold via a shadow pipe, an intermediate container and an immersion pipe.
  • the upper part of the mold is funnel-shaped to accommodate the dip tube and to guide the liquid steel into the intended cross section of the thin slab.
  • the level in the mold is automatically regulated during the casting process. Thanks to the precise guidance and adapted stroke frequency of the mold lifting table, thin slabs with a high surface quality are produced with the addition of casting powders.
  • a pair of squeeze rollers are arranged immediately downstream of the mold outlet. These have bearings that can be adjusted in a horizontal plane by means of hydraulic adjusting devices and squeeze the solidified shells of the cast strand onto one another. In this way, they prevent the intended cross-section of the thin slab from being deformed and liquid steel from breaking out of the not yet solidified core of the resulting thin slab.
  • Both the width of the mold and the pinch gap between the pinch rollers can be variably adjusted from the control panel during the casting process. It is extremely important that the exit gap of the mold and the pinch gap of the pinch rollers coincide with one another without offset.
  • this exact setting required a high degree of control technology devices because the pinch rollers with their bearings were guided in horizontal slide guides and were delivered by hydraulic actuating devices that act from the outside.
  • this design required a comparatively high quality of the mechanical guide elements in order to set the pinch roller gap extremely precisely in a congruent position to the outlet gap of the mold.
  • these guides were prone to failure and required maintenance due to the accumulation of contamination by casting powder, dust and steel deposits due to occasional outbreaks.
  • the invention has for its object to provide an improved and simplified design of the pinch roller assembly including its bearings and hydraulic actuators, through which the existing difficulties are overcome and a problem-free congruent assignment of pinch roller gap and outlet opening of the mold can be realized with simple means.
  • Figure 1 shows the essential elements of a CSP continuous casting machine.
  • Liquid steel is poured from a ladle (not shown) through a spout (43) into an intermediate container (44) up to a predetermined bath level and from there via a level (see Fig. 2, number 5) regulating the mold (1)
  • Closure system (45) and the dip tube (46) in constant flow into the mold (1).
  • the hot strand (2) is formed in a known manner and emerges from the mouthpiece (see FIG. 2, number 6) of the mold (1) with a solidified but still plastically deformable shell and a liquid core.
  • the hot strand is passed through the nip of the nip rollers (10, 11).
  • the strand (2) Due to the simultaneous intensive cooling, a comparatively rapid solidification of the cast strand (2) is brought about due to the small thickness.
  • the strand (2) is guided through the press rollers (47) arranged below the pinch rollers (10, 11) and the cross-sectional shape of these is made more uniform at temperatures just below the solidification point.
  • the strand guide (48) underneath is deflected from the vertical casting direction into the horizontal rolling plane.
  • FIGS. The arrangement of the pinch rollers (10, 11) and their bearings (14, 15) in the bearing housings (17, 18) is shown in FIGS. From this it can be seen that the bearings (14) and (15) of the pinch rollers (10) and (11) on cross members (25) and (26) two with lateral legs (23) and (24) U-shaped trained frame parts (20) or (21) are arranged.
  • the legs (23) and (24) are suspended on both sides of the mold (1) in self-aligning bearings (40/40) and (41/41; 42/42), the hydraulic adjusting devices (30) and (31 ) are arranged between the cross members (25) and (26) and are connected to them in an articulated manner, as can be clearly seen from the top view in FIG. 3.
  • FIG. 2 shows a hint of the liquid steel level (5) in the mold (1) and the arrangement of the dip tube (4) and the warm strand (2) emerging from the outlet opening (6).
  • FIG. 4 it is shown that a pair of legs (23) or (24) of a U-shaped frame part (20) or (21) each have two self-aligning bearings (41/41) or (42 / 42) are assigned. These Due to the number of four self-aligning bearings (41/41; 42/42), arrangement requires a little more effort, but on the other hand the crossbeams (25, 26) can each be shortened by the size of the width of one leg (23, 24).
  • An equivalent alternative design provides that two pairs of legs (23/23) and (24/24) of the two cross members (25) and (26) are assigned a pair of self-aligning bearings (40/40) which accommodate these is. Such an assignment is shown in Figures 2 and 3 in side view and top view. Both alternative arrangements are indicated purely schematically in FIG. FIG. 2 also shows that the self-aligning bearings (40) are arranged at the level (5) laterally next to the mold (1) on the mold lifting table (3).
  • FIG. 4 A very useful embodiment of the crossbeams (25) or (26) is shown in section in FIG. They are horizontal beams designed as thick-walled tubes. This design advantageously combines a maximum level of resistance to deflection with a comparatively low construction weight.
  • Fig. 4 it is also shown that the bearing housings (17) or (18) of the pinch roller bearings with the pinch rollers (10) or (11) set in the operating position are arranged on the cross members (25) or (26) in such a way that span them with these horizontal planes (xx).
  • the arrangement of the pinch roller bearings (14) and (15) can be clearly seen from the top view in FIG. 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP94102619A 1993-03-10 1994-02-22 Machine pour la coulée continue de brames minces en acier Withdrawn EP0614714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934307464 DE4307464C2 (de) 1993-03-10 1993-03-10 CSP-Stranggießmaschine für die kontinuierliche Herstellung von Dünnbrammen aus Stahl
DE4307464 1993-03-10

Publications (1)

Publication Number Publication Date
EP0614714A1 true EP0614714A1 (fr) 1994-09-14

Family

ID=6482367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102619A Withdrawn EP0614714A1 (fr) 1993-03-10 1994-02-22 Machine pour la coulée continue de brames minces en acier

Country Status (2)

Country Link
EP (1) EP0614714A1 (fr)
DE (1) DE4307464C2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745444A1 (fr) * 1995-05-27 1996-12-04 Sms Schloemann-Siemag Aktiengesellschaft Procédé et installation pour fabriquer des brames minces ou des bandes d'acier
EP0920938A1 (fr) * 1997-12-05 1999-06-09 Sms Schloemann-Siemag Aktiengesellschaft Procédé et installation de coulée continue de production de brames mincesince
EP0992303A1 (fr) * 1998-08-26 2000-04-12 Sms Schloemann-Siemag Aktiengesellschaft Procédé pour l'extraction d'une barre coulée en continue et installation de coulée continue courbe pour la mise en oeuvre du procédé
US6129137A (en) * 1997-12-17 2000-10-10 Sms Schloemann-Siemag Aktiengesellschaft Method for producing thin slabs in a continuous casting plant
WO2007039483A1 (fr) * 2005-09-22 2007-04-12 Danieli & C. Officine Meccaniche S.P.A. Procede et installation de production de bande metallique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1197837A (fr) * 1957-01-11 1959-12-03 Boehler & Co Ag Geb Installation de coulée continue
WO1987000099A1 (fr) * 1985-06-25 1987-01-15 Clecim Procede et machine de coulee continue d'un produit metallique mince
EP0286862A1 (fr) * 1987-04-13 1988-10-19 Thyssen Stahl Aktiengesellschaft Procédé pour fabriquer une bande d'acier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1197837A (fr) * 1957-01-11 1959-12-03 Boehler & Co Ag Geb Installation de coulée continue
WO1987000099A1 (fr) * 1985-06-25 1987-01-15 Clecim Procede et machine de coulee continue d'un produit metallique mince
EP0286862A1 (fr) * 1987-04-13 1988-10-19 Thyssen Stahl Aktiengesellschaft Procédé pour fabriquer une bande d'acier

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745444A1 (fr) * 1995-05-27 1996-12-04 Sms Schloemann-Siemag Aktiengesellschaft Procédé et installation pour fabriquer des brames minces ou des bandes d'acier
EP0920938A1 (fr) * 1997-12-05 1999-06-09 Sms Schloemann-Siemag Aktiengesellschaft Procédé et installation de coulée continue de production de brames mincesince
US6129137A (en) * 1997-12-17 2000-10-10 Sms Schloemann-Siemag Aktiengesellschaft Method for producing thin slabs in a continuous casting plant
AU760389B2 (en) * 1997-12-17 2003-05-15 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for producing thin slabs in a continuous casting plant
EP0992303A1 (fr) * 1998-08-26 2000-04-12 Sms Schloemann-Siemag Aktiengesellschaft Procédé pour l'extraction d'une barre coulée en continue et installation de coulée continue courbe pour la mise en oeuvre du procédé
WO2007039483A1 (fr) * 2005-09-22 2007-04-12 Danieli & C. Officine Meccaniche S.P.A. Procede et installation de production de bande metallique

Also Published As

Publication number Publication date
DE4307464A1 (de) 1994-09-15
DE4307464C2 (de) 2001-04-12

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