EP0546885B1 - Cylindre pour une machine de coulée continue de bandes métalliques, machine de coulée continue correspondante et procédé de réalisation d'un tel cylindre - Google Patents

Cylindre pour une machine de coulée continue de bandes métalliques, machine de coulée continue correspondante et procédé de réalisation d'un tel cylindre Download PDF

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Publication number
EP0546885B1
EP0546885B1 EP92403219A EP92403219A EP0546885B1 EP 0546885 B1 EP0546885 B1 EP 0546885B1 EP 92403219 A EP92403219 A EP 92403219A EP 92403219 A EP92403219 A EP 92403219A EP 0546885 B1 EP0546885 B1 EP 0546885B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
roughness
groove
casting machine
end zones
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
EP92403219A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0546885A1 (fr
Inventor
Jean-Michel Damasse
Jean-Marie Osswald
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.)
Thyssen Stahl AG
USINOR SA
Original Assignee
Thyssen Stahl AG
USINOR Sacilor 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 Thyssen Stahl AG, USINOR Sacilor SA filed Critical Thyssen Stahl AG
Publication of EP0546885A1 publication Critical patent/EP0546885A1/fr
Application granted granted Critical
Publication of EP0546885B1 publication Critical patent/EP0546885B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B22D11/0674—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for machining
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/0651—Casting wheels

Definitions

  • the invention relates to a cylinder for a machine for continuously casting thin metal strips such as a machine for casting between two cylinders or on a cylinder.
  • a casting machine comprises at least one cylinder whose surface, or table, comes into contact with the cast metal and which ensures the forming, the solidification, the drive and the guidance of the strip.
  • the roughnesses of the extreme and central parts are very distinct and are obtained, for example, by burnishing the surface of the cylinders. On these cylinders, the roughness varies discontinuously along a generator. This results in a drawback: at the right of the discontinuity, a mark is formed on the strip which can locally weaken the strip and lead to its rupture along this mark. It then appears, on the bank, narrow ribbons which separate from the strip, get tangled and evacuate badly, which can lead to stopping the casting.
  • the object of the present invention is to provide cylinders which avoid the aforementioned drawback while ensuring good training of the strip during casting.
  • the subject of the invention is a cylinder for a machine for continuously casting thin metal strips between two cylinders or on a cylinder comprising at least one cylinder whose surface coming into contact with the cast metal has a different roughness in the extreme zones of the cylinder close to its lateral ends and in the central zone, said roughness varying continuously along any generatrix of said cylinder and the roughness of the extreme zones being greater than the roughness of the central zone.
  • the invention also relates to a method for producing a cylinder according to which a roller burnishing is carried out at variable pressure on the surface of said cylinder to obtain roughness.
  • a roller burnishing is carried out at variable pressure on the surface of said cylinder to obtain roughness.
  • the end regions of the cylinder can be machined slightly conical so that after burnishing, the generatrices of the external surface of said cylinder are rectilinear.
  • the invention finally relates to a method for producing a cylinder according to which a helical groove having the axis of the cylinder as its axis is created by machining with removal of chips from the surface of the cylinder.
  • the pitch of the propeller formed by the groove and the depth of the groove can be variable along a generatrix of the cylinder.
  • Figure 1 is a schematic side view of a cylinder according to the invention.
  • Figure 2 is a curve showing the evolution of roughness along a generatrix of the cylinder.
  • Figure 3 is a side view of a rough machining cylinder.
  • Figure 4 is a section in the vicinity of the surface of a cylinder whose roughness was obtained by machining.
  • the cylinder shown in Figure 1 corresponds to the invention. It has a generally cylindrical table 1 which is partially in contact with the cast metal when the continuous strip casting machine on which it is mounted is in service.
  • This cylinder has two lateral ends 2 and 3.
  • the table 1 of the cylinder has a certain roughness, but this roughness is not constant.
  • the roughness measured by the standardized coefficient R z is preferably between 50 and 300 ⁇ m, and in the central part 6, between 20 and 150 ⁇ m, for example respectively 150 ⁇ m and 80 ⁇ m.
  • the peculiarity of this cylinder is that the roughness varies continuously and gradually when moving along a generator of the cylinder. This is what is shown in FIG. 2.
  • Parts A and A ′ of curve 7 represent the roughness in the extreme zones. This roughness is maximum near the lateral ends of the cylinder then decreases regularly until the value of part B of the curve corresponding to the central zone of the cylinder.
  • the end zones can have a width of approximately 10 mm.
  • This roughness is necessary to have good contact between the cylinder and the thin strip during casting.
  • the greater roughness of the extreme zones is necessary to have a good training of the edges of the strip.
  • no discontinuities are created over the width of the strip, which prevents it from breaking along the discontinuity and to form ribbons on each side which would disturb the evacuation of the strip.
  • the roughness can be obtained by different methods.
  • the surface of the cylinder is burnished.
  • the roller pressure is gradually varied as the roller tool moves along the cylinder table. In the extreme zones, this pressure is high and then is gradually reduced to a lower value corresponding to the roughness of the central zone.
  • the burnishing operation which is carried out by pushing the metal inside recessed grooves, creates bumps which cause the cylinder to swell. This swelling of the cylinder is all the more important as the roughness obtained is important.
  • a cylinder according to the invention the generators of which are initially rectilinear, would have a larger outside diameter in the extreme zones than in the central zone, which would lead to a strip whose edges would be thinner than the central part.
  • the central zone of the cylinder 8 is cylindrical and of a diameter close to the final diameter desired for the cylinder.
  • the end zones 9 and 10 are machined in a slightly conical manner, so that the diameters in the vicinity of the faces 11 and 12 are smaller than the diameter of the table.
  • a person skilled in the art knows how to determine the swelling caused by burnishing. He therefore knows how to determine the conicity which must be given by machining to the extreme zones in order to have, after burnishing, a cylinder of constant diameter.
  • the roughness is obtained by machining with removal of chips.
  • a helical groove 20 with contiguous turns is created thereon having as axis the axis of the cylinder 21.
  • the surface of the cylinder 21 has a succession of hollows 23 and bumps 24.
  • the recesses 23 correspond to the bottom of the groove 20 and the bumps 24 at the junction between two successive turns.
  • This groove 20 is obtained by machining by turning with a significant advance of the tool. If the advance at each turn is a , the groove 20 has a depth h ; if the advance is a 'larger than a, the depth of the groove 20 is h' greater than h.
  • the roughness which corresponds to the depth of the groove 20 can be varied.
  • a large advance will be chosen in the zones of the surface of the cylinder which are located near the lateral ends of the latter and a lower advance in the central zone.
  • an advance of 0.35 mm per revolution is chosen over the first 15 mm and the last 15 mm of the cylinder table from its lateral ends and an advance of 0.15 mm / revolution on the middle area of the table.
  • a roughness Rz is thus obtained 150 ⁇ m on the areas where the feed is 0.35 mm / turn and a roughness of 80 ⁇ m on the area where the feed is 0.15 mm / turn.
  • the advance is varied gradually to obtain a roughness which varies continuously along a generatrix of the surface of the cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Metal Rolling (AREA)
EP92403219A 1991-12-11 1992-11-27 Cylindre pour une machine de coulée continue de bandes métalliques, machine de coulée continue correspondante et procédé de réalisation d'un tel cylindre Expired - Lifetime EP0546885B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9115383 1991-12-11
FR9115383A FR2684904B1 (fr) 1991-12-11 1991-12-11 Cylindre pour une machine de coulee continue de bandes metalliques, machine de coulee continue correspondante et procede de realisation d'un tel cylindre.

Publications (2)

Publication Number Publication Date
EP0546885A1 EP0546885A1 (fr) 1993-06-16
EP0546885B1 true EP0546885B1 (fr) 1997-08-13

Family

ID=9419931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92403219A Expired - Lifetime EP0546885B1 (fr) 1991-12-11 1992-11-27 Cylindre pour une machine de coulée continue de bandes métalliques, machine de coulée continue correspondante et procédé de réalisation d'un tel cylindre

Country Status (12)

Country Link
EP (1) EP0546885B1 (es)
JP (1) JP3181739B2 (es)
KR (1) KR100295519B1 (es)
AT (1) ATE156734T1 (es)
AU (1) AU658463B2 (es)
CA (1) CA2084232C (es)
DE (2) DE69221591T2 (es)
DK (1) DK0546885T3 (es)
ES (1) ES2106152T3 (es)
FR (1) FR2684904B1 (es)
GR (1) GR3024977T3 (es)
ZA (1) ZA929567B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011050417A1 (en) * 2009-10-30 2011-05-05 Bluescope Steel Limited Method and apparatus for controlling variable shell thickness in cast strip

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08505811A (ja) * 1993-11-18 1996-06-25 石川島播磨重工業株式会社 鋼ストリップ鋳造
AUPN281195A0 (en) * 1995-05-05 1995-06-01 Bhp Steel (Jla) Pty Limited Casting steel strip
AUPP040397A0 (en) * 1997-11-14 1997-12-11 Bhp Steel (Jla) Pty Limited Casting metal strip
KR100356176B1 (ko) * 1998-12-21 2002-11-18 주식회사 포스코 쌍롤형 박판주조기용 냉각롤
WO2006094803A1 (de) * 2005-03-10 2006-09-14 Sms Demag Ag Verfahren zum herstellen einer stranggiesskokille und stranggiesskokille
DE102005023745B4 (de) 2005-03-10 2022-02-10 Sms Group Gmbh Verfahren zum Herstellen einer Stranggiesskokille und Stranggiesskokille
JP4821199B2 (ja) * 2005-07-12 2011-11-24 株式会社Ｉｈｉ 双ロール鋳造機
KR101712005B1 (ko) * 2014-04-24 2017-03-03 주식회사 오리온이엔씨 현장형 수질 방사능 감시 방법 및 장치
US20180179612A1 (en) * 2016-12-23 2018-06-28 Posco Duplex stainless steel sheet having excellent corrosion resistance and method for manufacturing the same
KR102257327B1 (ko) * 2019-07-03 2021-05-31 한국원자력연구원 방사선 측정 장치 및 이를 이용한 방사성 오염도 측정 방법
KR102577739B1 (ko) * 2023-02-06 2023-09-12 향상기업주식회사 홈이 형성된 금속판 및 이의 제조방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705095A (en) * 1986-01-09 1987-11-10 Ribbon Technology Corporation Textured substrate and method for the direct, continuous casting of metal sheet exhibiting improved uniformity
JPS62240149A (ja) * 1986-04-14 1987-10-20 Sumitomo Metal Ind Ltd 連続鋳造機用鋳片案内ロ−ル
JPS6483343A (en) * 1987-09-24 1989-03-29 Nippon Steel Corp Method for continuously casting cast thin slab
JPH082479B2 (ja) * 1988-07-22 1996-01-17 日新製鋼株式会社 薄板連鋳機
FR2654659B1 (fr) * 1989-11-23 1992-02-07 Siderurgie Fse Inst Rech Procede et dispositif de coulee continue sur un ou entre deux cylindres.
US5179996A (en) * 1989-11-23 1993-01-19 Usinor Sacilor Process and device for continuous casting on a roll or between two rolls

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011050417A1 (en) * 2009-10-30 2011-05-05 Bluescope Steel Limited Method and apparatus for controlling variable shell thickness in cast strip

Also Published As

Publication number Publication date
EP0546885A1 (fr) 1993-06-16
FR2684904A1 (fr) 1993-06-18
AU2992992A (en) 1993-06-17
CA2084232C (fr) 2003-02-25
FR2684904B1 (fr) 1994-03-18
KR930012145A (ko) 1993-07-20
DK0546885T3 (da) 1997-10-27
DE69221591T2 (de) 1998-01-22
KR100295519B1 (ko) 2001-09-17
CA2084232A1 (fr) 1993-06-12
DE4241775A1 (es) 1993-07-08
ATE156734T1 (de) 1997-08-15
AU658463B2 (en) 1995-04-13
DE69221591D1 (de) 1997-09-18
JPH05329585A (ja) 1993-12-14
JP3181739B2 (ja) 2001-07-03
ZA929567B (en) 1994-06-10
ES2106152T3 (es) 1997-11-01
GR3024977T3 (en) 1998-01-30

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Effective date: 20041130

Owner name: *USINOR SACILOR

Effective date: 20041130