EP0074247B1 - Multi-point straightening bow type continuous-casting machine having a low machine height - Google Patents

Multi-point straightening bow type continuous-casting machine having a low machine height Download PDF

Info

Publication number
EP0074247B1
EP0074247B1 EP82304600A EP82304600A EP0074247B1 EP 0074247 B1 EP0074247 B1 EP 0074247B1 EP 82304600 A EP82304600 A EP 82304600A EP 82304600 A EP82304600 A EP 82304600A EP 0074247 B1 EP0074247 B1 EP 0074247B1
Authority
EP
European Patent Office
Prior art keywords
strand
straightening
stand
rolls
oscillation
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
Application number
EP82304600A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0074247A1 (en
Inventor
Tadashi Nippon Steel Corporation Murakami
Zenzo Nippon Steel Corporation Soejima
Chihiro Nippon Steel Corporation Yamaji
Haruo Nippon Steel Corporation Kitamura
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15221685&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0074247(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to AT82304600T priority Critical patent/ATE18640T1/de
Publication of EP0074247A1 publication Critical patent/EP0074247A1/en
Application granted granted Critical
Publication of EP0074247B1 publication Critical patent/EP0074247B1/en
Expired legal-status Critical Current

Links

Images

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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • the present invention relates to a bow-type continuous-casting machine which comprises a curved mold, an oscillating means for imparting oscillation movement to the curved mold, a strand-guiding means which guides a strand along the basic radius of the curve, a straightening means in which a plurality of pairs of upper and lower straightening rolls for straightening the strand are arranged, and a horizontal guiding means for guiding the straightened strand in a horizontal direction.
  • a CCM (continuous casting machine) having a low machine-height (low-head) is described in Japanese Unexamined Patent Publication (Kokai) Nos. 56 - 14062 to 56-14065.
  • These publications disclose, in a specific embodiment, a multi-point straightening bow-type low-head CCM with a machine height of a little less than 6 m, a continuous five-point straightening means, and a basic radius of the curve of the curved mold and the strand-guiding means of 5800 mm.
  • casting is carried out under a low casting-speed in the range of from 0.7 to 0.75 m/ min and under moderate cooling.
  • the continuous five-point straightening means can straighten strand portions where the molten steel has not fully solidified, i.e. the percentage of solidification of the molten steel is from 40% to 70%, and the solidified shell has high-temperature and is thin.
  • the ferrostatic pressure applied to said strand portions is low and the straightening internal- strain at each of the five straightening points is 0.35% or less.
  • the surface temperature of the strand portion in the continuous five-point straightening means being in the range of from 900°C to 1000°C, of a quality not only not inferior to but improved over that of a strand obtained by means of a conventional bow-type CCM having a high machine height (high-head CCM), in which the basic radius of the curve is from 10.5 to 12.5 m and the straightening of a strand is carried out by means of single unbending or one-point straightening.
  • the broad object of the present invention is to provide such a low-head CCM in which the maintainability of the parts and equipment of the low head CCM constituting the curved strand-guiding path is remarkably improved.
  • a CCM is known from EP 0015893 in which interchangeable segments of the strand guiding means are removably attached to a support frame and may be removed and fitted using an arm pivoted at the centre of curvature of the guiding path. Maintainance thus has to be performed on the CCM itself which leads to excessive downtime when roll segments have to be replaced.
  • a high-head CCM is also known from GB 1 222 337.
  • the mould and its oscillating means and the strand guiding means are mounted on a removable stand which is disposed on a base frame on a foundation.
  • the stand is wheeled by a jack to one side of the CCM for maintenance, although it can also then be lifted off by a crane and exchanged.
  • Straightening is effected by straightening means called an "extractor" fixed to the foundation and having a plurality of pairs of rolls. However the straightening takes place substantially completely at the first roll pair.
  • the oscillation-generating device is also separately mounted on the foundatiorrand is connected to the oscillating means on the stand by a detachable link.
  • a more specific object of the invention is to provide a low-head CCM in which it remains possible to carry out efficient maintenance having regard also to the need to adjust and maintain the roll segments.
  • the CCM of the present invention is characterised by the features in the characterising part of claim 1.
  • both the strand-guiding means and the straightening means comprise the detachable pairs of rolls mounted on the detachable main frame on the stand.
  • the present invention was made on the basis of the above-mentioned discovery.
  • oscillating table 7 mounted on the stand 3 is caused to oscillate by an oscillating means 8.
  • the oscillating means 8 is mounted on the stand 3.
  • a curved mold 9 is mounted on the oscillating table 7.
  • the oscillating table 7 is pivotably supported at its supporting point 0 1 and at its oscillation point 0 2 by means of a blanket 40 mounted on the stand 3 and by means of an oscillating-driving lever 42 including an oscillation-generating cam shaft 41 of the oscillating means 8, respectively.
  • An oscillation-driving reduction unit 43 and a driving motor 44 are also mounted on the stand 3.
  • a rotary driving shaft 47 of the oscillation-generating cam shaft 41 is connected to a rotary driving shaft 45 of the reduction unit 43 through a coupling 46. The rotation of the rotary driving shaft 47 is transmitted to the oscillation-generating cam shaft 41 through a transmission mechanism (not shown).
  • a main frame 10 is connected to and is located within the stand 3.
  • a strand-guiding means 11 and a multi-point straightening means 12 are removably and exchangeably mounted on the main frame 10.
  • the strand-guiding means 11 is one conventionally used in the high-head CCM and is composed of a strand-guiding roll segment consisting of a plurality of pairs of upper and lower supporting rolls. More particularly, the strand-guiding roll segment comprises a plurality of lower supporting rolls 14 rotatably supported by a lower segment frame 13 and a plurality of upper supporting rolls 15 rotatably supported by an upper segment frame 16. Each of the upper supporting rolls 15 has a corresponding lower supporting roll 14 positioned opposite thereto.
  • the upper segment frame 16 is connected to the lower segment frame 13 through a coupling rod (not shown).
  • the strand-guiding means 11, in the form of a segment, is connected to the main frame 10. by a coupling 18.
  • Each of the lower supporting rolls 14 of the strand-guiding means 11, whose lower frame 13 is mounted on the main frame 10, is arranged along the basic radius of the curve.
  • the multi-point straightening means 12 comprises a series of three strand-straightening roll segments 24 arranged removably and exchangeably on the main frame 10.
  • Each of the strand-straightening roll segments 24 comprises a plurality of pairs of straightening rolls 21 rotatably supported on opposing surfaces of a lower segment frame 19A and an upper segment frame 19B.
  • the upper segment frame 19B is removably secured to coupling rods 20 installed at four corners of the lower segment frame 19A.
  • the straightening rolls 21, which are rotatably supported by the lower segment frame 19A, are positioned so as to define curves having successively increasing radii.
  • the strand-straightening roll segments 24 are connected to the main frame 10 by means of a coupling 25.
  • a guiding means for guiding a strand in the horizontal direction comprises a group of horizontal guiding roll segments and is installed after the multi-poiht straightening means 12 located within the stand 3.
  • the horizontal guiding means is not shown in the drawings.
  • Reference numeral 26 denotes a lifting fitting provided on the stand 3.
  • the curved mold 9, the oscillating means 8, the strand guiding means 11 and the multi-point straightening means 12 are directly or indirectly set in the single stand.
  • release of the force of the stand-pressing means 5, pressing the stand 3 against the stand-fixing means 4 allows rapid exchange of the stand 3 with another stand (not shown) of the same construction, located off line and ready for use, by means of a crane (not shown).
  • the curved strand-guiding apparatus which comprises the curved mold 9, the strand-guiding means 11, and the multi-point straightening means 12, i.e., the three strand-straightening roll segments 24, can be subjected to inspection and maintenance. If necessary, the curved mold 9, the strand-guiding means 11 or the multi-point straightening means 12 can then be replaced.
  • the low-head CCM of the present invention therefore enables roll-alignment adjustment between the segments 11, 24 off line, compared with the conventional high-head CCM where such roll alignment adjustment- has been effected on line. Therefore, more precise roll-alignment adjustment becomes possible in the present invention.
  • the multi-point straightening means 12 is removed from the main frame connected to the stand 3.
  • the oscillation-driving reduction unit 43 and the driving motor 44 of the oscillating means 8 are mounted on a holder 48 secured to the foundation 2.
  • the oscillation-generating cam shaft 41 of the oscillating means 8 is mounted on the stand 3 which is removably and exchangeably placed on the stand-carrying base frame 1.
  • the rotary driving shaft 45 of the oscillation driving reduction unit 43 is removably connected to the rotary driving shaft 47 of the oscillation-generating cam shaft 41 through a connecting and disconnecting mechanism 49. So as to minimize the time required for the exchange work of the stand 3, the numbers of necessary oscillation-driving reduction units 43 and driving motors 44 have been kept at one each.
  • a spline shaft 50 is fitted to the rotary driving shaft 45 of the oscillation-driving reduction unit 43.
  • a shaft 51 having a spline bore is fitted to the end of the rotary driving shaft 47 of the oscillation-generating cam shaft 41.
  • a bearing 52 located on the holder 48 is displaceable forward and backward guided by a guide 58.
  • a transmission shaft 53 is rotatably supported by the bearing 52. The end portion of the transmission shaft 53 forms a spline shaft 54 which is removably fitted in the spline bore of the shaft 51.
  • a shaft 55 has a spline bore into which the spline shaft 50 of the oscillation-driving reduction unit 43 is inserted, is slidable in the direction of the spline shaft 50, and is fitted in the rear end of the transmission shaft 53.
  • a hydraulic cylinder 56 is connected to the rear end of the guide 58 located on the holder 48.
  • the cylinder shaft 57 is connected to the bearing 52.
  • the multi-point straightening means 12 of the low-head CCM 27 (Figs. 1 and 7)
  • a larger number of straightening points is preferable so as to disperse the strain.
  • the diameter of and the distance between the straightening rolls 21 are smaller than those of rolls of a strand-guiding roll segment of a high-head CCM.
  • the rolls supported by the upper or lower segment frames are rotatably and removably disposed in roll-bearing boxes secured to the frame surface by means of nuts and bolts.
  • strand-straightening roll segments having the structure shown in Figs. 3 through 6, in which divided rolls can be easily exchanged, are used for the strand-straightening roll segments 24 of the multi-point straightening means 12"shown in Fig. 1.
  • Fig. 3 is a front view of the strand-straightening roll segment 24.
  • Fig. 4 is a cross-sectional view along line A-A of Fig. 3.
  • Figure 5 is a cross-sectional view along line B-B of Fig. 4.
  • Fig. 6 is an enlarged cross-sectional view of the portion of Fig. 3.
  • each of the lower and upper segment frames 19A and B is provided with rectangular apertures 29 into which a cassette frame 28 for supporting divided straightening-rolls is fitted. Furthermore, screw shafts 30 (Fig. 6) are screwed at the two outer sides of the rectangular apertures 29.
  • a pair of straightening rolls 21 each having roll-bearing boxes 31 at the ends thereof are placed in juxtaposition to each other.
  • the roll-bearing boxes 31 are secured to the cassette frame 28 in a conventional manner.
  • Taper surfaces 33 are formed on the bottom surfaces of the two ends of the cassette frame 28, which surfaces are positioned in the rectangular apertures 29.
  • the two taper surfaces 33 are opposite to one another.
  • the two ends of the cassette frame 28 are provided with penetrating apertures 32 through which the screw shaft 30 of the lower and upper segment frames 19A and B is projected.
  • a cassette type roll assembly 34 is constructed.
  • the screw shaft 30 is fitted in a taper block 36 having an elliptical aperture 35.
  • the end of a bolt 38 engaged with a nut means 37 is secured to the upper surface of the cassette frame 28 outside the taper block 36.
  • a bolt 38 engaged with the nut means 37 is connected at an end thereof to the rear surface of the taper block 36 so that the taper block 36 can be displaced forward and backward by rotation of the bolt 38.
  • the screw shafts 30 are fitted in the penetrating apertures 32 of the cassette frame 28 of the cassette type roll assembly 34 so that the cassette frame 28 rests on the tapered surface of the taper block 36. Then the taper block 36 is displaced forward and backward by rotating the bolt 38, thereby to condition the roll surface. Thereafter, nuts 39 (Fig. 3) are engaged with the screw shafts 30 so as to fix the cassette type roll assembly 34 in place.
  • the lower and upper segment frames 19 are connected to each other by means of the coupling rods 20 in a conventional manner, as shown in Fig. 3.
  • the divided straightening rolls 21 can be rapidly exchanged with new divided straightening rolls (not shown) merely by removing two nuts 39 on both sides of the cassette frame 28 and by exchanging the corresponding cassette type roll assembly 34 with a spare cassette type roll assembly (not shown).
  • the roll alignment adjustment of the new divided straightening rolls 21 can be carried out merely by adjusting the position of the taper blocks 36 on both sides of the cassette frame 28. Therefore, the roll alignment adjustment can also be effected rapidly and certainly.
  • the divided straightening rolls 21 may be removed from the cassette frame 28 and exchanged with other divided straightening rolls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Valve Housings (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Bridges Or Land Bridges (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
EP82304600A 1981-09-04 1982-09-01 Multi-point straightening bow type continuous-casting machine having a low machine height Expired EP0074247B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82304600T ATE18640T1 (de) 1981-09-04 1982-09-01 Maschine des bogenstranggusstyps mit vielpunktrichtanordnung und mit einer niedrigen anlagenhoehe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP138426/81 1981-09-04
JP56138426A JPS5850156A (ja) 1981-09-04 1981-09-04 低機高、多点矯正彎曲型連続鋳造機

Publications (2)

Publication Number Publication Date
EP0074247A1 EP0074247A1 (en) 1983-03-16
EP0074247B1 true EP0074247B1 (en) 1986-03-19

Family

ID=15221685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82304600A Expired EP0074247B1 (en) 1981-09-04 1982-09-01 Multi-point straightening bow type continuous-casting machine having a low machine height

Country Status (8)

Country Link
EP (1) EP0074247B1 (ja)
JP (1) JPS5850156A (ja)
AT (1) ATE18640T1 (ja)
BR (1) BR8205209A (ja)
CA (1) CA1195471A (ja)
DE (1) DE3269992D1 (ja)
ES (1) ES515466A0 (ja)
ZA (1) ZA826385B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013224557A1 (de) 2013-11-29 2015-06-03 Sms Siemag Ag Stranggießanlage und Verfahren zum Stranggießen eines Metallstranges

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379534A (en) * 1991-01-22 1995-01-10 Negishi; Jinichiro Bucket equipped with mixing device, excavation machine having the bucket, and soil improvement method using the excavation machine
JPH0435787A (ja) * 1990-05-31 1992-02-06 Omuko Higashi Nippon:Kk アルカリイオン水
US5491914A (en) * 1992-11-24 1996-02-20 Negishi; Jinichiro Bucket equipped with mixing device, excavation machine having the bucket, and soil improvement method using the excavation machine
DE102007005778A1 (de) 2006-03-09 2007-09-13 Sms Demag Ag Stranggießanlage und Verfahren zum Betreiben einer Stranggießanlage
CN109226704B (zh) * 2018-11-03 2024-06-14 深圳阿尔泰克轻合金技术有限公司 一种铝锭生产系统及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH404093A (de) * 1963-06-25 1965-12-15 Moossche Eisenwerke Ag Verfahren zum kontinuierlichen Herstellen von profilierten Strängen und Stranggiessanlage zur Durchführung dieses Verfahrens
CH495800A (de) * 1969-05-20 1970-09-15 Concast Ag Auszieh- und Richtvorrichtung für Stranggiezzanlagen mit gekrümmter Strangführung
BE787511A (fr) * 1971-08-16 1973-02-12 Uss Eng & Consult Procede et appareil pour redresser des pieces coulees en continu
DE2264330A1 (de) * 1972-12-30 1974-07-25 Schloemann Ag Treib- und richtvorrichtung an einer stahlstranggiessanlage
DE2636667B1 (de) * 1976-08-14 1977-12-29 Demag Ag Walze fuer ein stuetz-, treib- und richt-walzengeruest bei einer metallstranggiessvorrichtung, insbesondere fuer eine stahlbrammen-bogenstranggiessvorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013224557A1 (de) 2013-11-29 2015-06-03 Sms Siemag Ag Stranggießanlage und Verfahren zum Stranggießen eines Metallstranges
EP2893993A1 (de) 2013-11-29 2015-07-15 SMS Siemag AG Stranggießanlage und Verfahren zum Stranggießen eines Metallstranges

Also Published As

Publication number Publication date
DE3269992D1 (en) 1986-04-24
ATE18640T1 (de) 1986-04-15
EP0074247A1 (en) 1983-03-16
BR8205209A (pt) 1983-08-16
CA1195471A (en) 1985-10-22
JPH0152102B2 (ja) 1989-11-07
JPS5850156A (ja) 1983-03-24
ZA826385B (en) 1983-07-27
ES8307553A1 (es) 1983-08-16
ES515466A0 (es) 1983-08-16

Similar Documents

Publication Publication Date Title
US3812900A (en) Method of operating a multi-roll casting machine during and after freezing of the liquid core of the strand
EP1473100B1 (en) Strip casting apparatus
US3710845A (en) Adjustable continuous casting mold
US3913658A (en) Adjustable plate mold for continuous casting
US3891025A (en) Apparatus for withdrawing a casting and feeding a dummy bar in a continuous casting machine for steel
EP0074247B1 (en) Multi-point straightening bow type continuous-casting machine having a low machine height
US3167829A (en) Apparatus for continuous casting of metal
CA1204574A (en) Apparatus for continuous casting of steel
US3828841A (en) Twin-belt metal casting machine having removable core assembly including coolant applicators and back-up rollers
US4367783A (en) Method and apparatus for continuous casting of metal under controlled load conditions
US6397924B1 (en) Strip casting apparatus
US3543555A (en) Form changing device for continuous casting
US6145575A (en) Continuous casting machine
US3752219A (en) Strand guide apparatus for continuous casting
US4706733A (en) Continuous casting machine
US3543830A (en) Method and apparatus for straightening arc-type continuous casting
US3763923A (en) Extractor for withdrawing or inserting roll-clusters
US4106550A (en) Pinch roll stand for use in multi-strand continuous casting machine
US4131154A (en) Roller apron for a continuous casting installation for steel
US3735804A (en) Adjustable conducting roll apparatus
US3608620A (en) Apparatus for guiding a straightened strand in a continuous casting machine
US6164366A (en) Strip casting apparatus
US4195684A (en) Apparatus for multi-strand continuous casting
KR102298552B1 (ko) 연속주조기의 세그먼트 상부프레임 회전장치
CN211539409U (zh) 一种单机架六辊三驱动渐进式拉矫机

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19820910

AK Designated contracting states

Designated state(s): AT DE FR GB IT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT

REF Corresponds to:

Ref document number: 18640

Country of ref document: AT

Date of ref document: 19860415

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3269992

Country of ref document: DE

Date of ref document: 19860424

ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA SOCIETA' SEMPLICE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19860930

Year of fee payment: 5

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: VOEST-ALPINE AKTIENGESELLSCHAFT

Effective date: 19861218

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state
27W Patent revoked

Effective date: 19870720

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO