US3882924A - Cast piece supporting apparatus for a continuous casting machine - Google Patents

Cast piece supporting apparatus for a continuous casting machine Download PDF

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Publication number
US3882924A
US3882924A US419101A US41910173A US3882924A US 3882924 A US3882924 A US 3882924A US 419101 A US419101 A US 419101A US 41910173 A US41910173 A US 41910173A US 3882924 A US3882924 A US 3882924A
Authority
US
United States
Prior art keywords
cast piece
mould
cooling
piece supporting
cast
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
US419101A
Other languages
English (en)
Inventor
Yasuo Fujikawa
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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
Priority claimed from JP12618372A external-priority patent/JPS4983619A/ja
Priority claimed from JP11468773A external-priority patent/JPS5065421A/ja
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Application granted granted Critical
Publication of US3882924A publication Critical patent/US3882924A/en
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
    • B22D11/14—Plants for continuous casting
    • B22D11/141—Plants for continuous casting for vertical casting
    • 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
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1243—Accessories for subsequent treating or working cast stock in situ for cooling by using cooling grids or cooling plates
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

  • the cast piece supporting apparatus disclosed includes cast piece supporting and cooling members, which are disposed just beneath a mould and movable in the upward and downward directions in synchronism with the upward and downward movements of said mould while encircling the outer peripheral surface of said cast piece.
  • the apparatus also includes driving means for making the cast piece supporting and cooling members either closely contact with, or separate from, said outer peripheral surface of said cast piece, and means for equalizing the lowering speed of said mould to the drawing speed ofsaid cast piece.
  • these members are made to closely contact with said outer peripheral surface of said cast piece, while upon raising the same, the members are made to separate from said outer peripheral surface of said cast piece.
  • the present invention relates, in general, to a cast piece supporting apparatus, and more particularly, to a cast piece supporting and cooling apparatus for a continuous casting machine.
  • One feature of the present invention is to provide a cast piece supporting apparatus for a continuous casting machine, characterized in that said apparatus comprises cast piece supporting and cooling members,
  • FIGS. 1 through 3 show one preferred embodiment of the present invention, FIG. 1 being a longitudinal cross-section View, FIG. 2 being a transverse crosssection view taken along line 11-11 in FIG. 1, and FIG. 3 being a diagrammatic view showing means for moving a mould'as well as a cast piece supporting apparatus according to the present invention in the upward and downward directions; and
  • FIGS. 4 and 5, respectively, show transverse crosssection views of alternative embodiments of the present invention.
  • a cast piece supporting apparatus consists of cast piece supporting and cooling members 4 adapted to be moved, hydraulic cylinders 5 for making said cast piece supporting and cooling members 4 either closely contact with or separate from a cast piece 11, spray tubes 9 and spray nozzles 10 for cooling said cast piece supporting and cooling members 4, and a support frame 3 (consisting of annular members 3 and upright members 3") for supporting all the above-referred members.
  • the support frame 3 is fixedly secured to the bottom end of a mould 1, so that the whole of the cast piece supporting apparatus can reciprocate in the upward and downward directions in synchronism with the upward and downward reciprocating motion 2a-2b of the mould l.
  • the cast piece supporting and cooling member 4 is made of an iron plate or a cooper plate, and either it is cooled by injecting thereagainst coolant water by means of the spray pipes 9 and the spray nozzles 10 provided behind said member or it is formed to have a water-cooled jacket structure, so that said member 4 is adapted to cool the cast piece when it is brought in close contact with the cast piece 11.
  • the above-referred spray tubes 9 and spray nozzles 10 form cooling means B for the cast piece supporting and cooling members 4.
  • a cast piece supporting and cooling member 4 is provided for eachouter peripheral surface of the cast piece 11, and each is.mounted on the upright members 3" of the suppor't'frame through pin joints 6.
  • This pin joint 6 is formed to have an elongated hole which enables the cast piece supporting and cooling member 4 to be displaced in its forth and back directions 7a-7b.
  • the cast piece supporting and cooling member 4 for each peripheral surface of the cast piece 11 are connected two, upper and lower, hydraulic cylinders' 5, and provision is made such that the cast piece supporting members 4 are pressed against or separated from the case piece 11 by simultaneously actuating all these hydraulic cylinders 5.
  • the above-referred hydraulic cylinders 5, pin joints 6, upright members 3", etc. form driving means A for the cast piece supporting and cooling members 4.
  • the construction of the subject apparatus for reciprocating the whole of the cast piece supporting apparatus in the upward and downward directions in synchronism with the upward and downward reciprocating motion 2a-2b of said mould 1 and for simultaneously pressing or separating the cast piece supporting and cooling members 4 to or from the cast piece 11, is diagrammatically shown in FIG. 3.
  • reference numeral 23 designates a plurality of hydraulic cylinders for supporting and vertically reciprocating the mould l, which hydraulic cylinders are adapted to be fed with pressurized oil from a hydraulic unit consisting of an oil tank 32, a filter 31, an oil pump 28 driven by an electric motor 29, a check valve 30, relief valves 25, 27 and 36, a transfer electromagnetic-valve 26, etc., and further there is provided a differential transformer 24 for detecting the upper and lower limit positions of the mould 1, so that the mould 1 is caused to reciprocate vertically with a predetermined amplitude by. switching the transfer electromagnetic-valve 26 in said hydraulic unit in response to the detection of the upper and lower limit positions of the mould l by means of the differential transformer 24.
  • the differential transformer 24 detects said lower limit position, and in response to the detected electrical signal 33 (represented by a dash line in FIG. 3) the transfer electromagnetic-valve 26 is switched to its position 26a as repesented in FIG. 3. Consequently, the pressurized oil fed from the oil tank 32 by means of the hydraulic pump 28 is supplied to the hydraulic cylinders 23 and to the other hydraulic cylinders for driving the cast piece supporting and cooling members through a hydraulic circuit 34, so that the mould 1 is raised in the direction 2a, while the cast piece supporting and cooling members 4 are displaced in the direction 7b and thereby separated from the cast piece 1 l.
  • the extent of this displacement may be of the order of a few milimeters.
  • the hydraulic pressure required for pushing up the mould 1 can be appropriately regulated by means of the relief valve 36 so that the mould 1 may be raised in the direction 2a at the highest permissible speed.
  • the differential transformer 24 detects that fact, and in response to the detected electrical signal 33' the transfer electromagnetic-valve 26 is switched to its position 26b opposite to the illustrated position.
  • the pressurized oil is supplied to the hydraulic cylinders 5 through a hydraulic circuit 35, so as to actuate said hydraulic cylinders 5 in the, opposite direction (in the direction 7a to the aforementioned case, for pressing the cast piece supporting afntf cooling members 4 against the cast piece 11.
  • the pressing force exerted by the hydraulic cylinders in this case can be preset at such a value that said pressing force is sufficient to prevent blisters of the cast piece 11 and yet the cast piece 11 is not crushed with an excessive force, by appropriately regulating the hydraulic pressure of said pressurized oil by means of the relief valve 25.
  • the mould 1 freely falls under its own gravity because the hydraulic circuit 34 is connected back to the oil tank owing to the switching of the transfer electromagnetic-valve 26 to its position 26b.
  • the lowering speed of the mould l in the direction 2b can be regulated by appropriately adjusting the hydraulic pressure of the back flow in the hydraulic circuit 34 by means of the relief valve 27, so that the lowering speed of the mould l in the direction 2b may be completely equalized to the predetermined drawing speed preselected in a cast piece drawing apparatus, not shown.
  • the above-referred differential transformer 24, transfer electromagnetic-valve 26, relief valve 27, hydraulic circuit 34, etc. form means for equalizing the lowering speed of the mould 1 to the drawing speed in the cast piece drawing apparatus.
  • the cast piece supporting and cooling members 4 supported by the mould 1 via the support frame 3 can reciprocate in the upward and downward directions in synchronism with the upward and downward movements 2a-2b of the mould 1, said members 4 rising as separated from the cast piece 11 when the mould 1 is raised in the direction 2a, while said members 4 lowering at the same speed as the drawing speed of the cast piece 11 as it is brought in close contact with the outer peripheral surface of the cast piece 11 under an appropriate pressing force thereagainst when the mould 1 is lowered in the direction 2b, whereby said cast piece supporting and cooling members 4 can support and guide the cast piece 11 without being accompanied with a relative slip between the cast piece 11 and said members 4 and also it can achieve a sufficient cooling effect upon the cast piece 11.
  • molten steel poured into the mould 1 is cooled as it makes contact with the water-cooled inner wall of said mould, resulting in formation of a solidified shell at its surface portion to form a cast piece 11, and then said cast piece enters the cast piece supporting apparatus according to the present invention while it is drawn from the mould 1 at a predetermined drawing speed by means of a cast piece drawing apparatus, now shown.
  • the cast piece supporting apparatus fixedly secured to said mould 1 also reciprocates in the upward and downward directions integrally with the mould 1, and during its downward movement it is lowered at a speed exactly equal to the drawing speed of the cast piece 11.
  • the cast piece supporting and cooling members 4 of the cast piece supporting apparatus are displaced in the direction 70 during their downward movement and brought in close contact with the outer peripheral surfaceof the'cast'piece 11 for preventing blisters of said cast'piece' l 1 and for cooling the same, whereas during their upward movement said members 4 are displaced in the direction 7b for sepa' rating from the outer peripheral surface of said cast piece 11.
  • the cast piece supporting and cooling members 4 are pressed against the outer peripheral surface of the cast piece 11 only during the downward movement in the direction 2b of said members 4 caused by the vertical reciprocating motion of the mould l, and owing to the heat conduction through the close contact between the cast piece 11 and said members 4, the cast piece 11 can be well cooled. Subsequently, when the mould 1 has reached its lower limit position and begins to rise in the direction 2a, the cast piece supporting and cooling members 4 are separated from the cast piece 11. As a result, friction would never occur between the cast piece 11 and the cast piece supporting and cooling members 4, and so there never occur the increase of the drawing resistance and the wear of the cast piece supporting and cooling members 4.
  • the above-described cast piece supporting apparatus can be subjected to modifications in various manners according to the cross-section dimension of the cast piece.
  • the cast piece supporting and cooling member 14 is formed to have an L-shaped cross-section so that one such member may support two surfaces of the cast piece 21, the operation for pressing and separating said members 14 to and from the cast piece 21 is carried out by means of hydraulic cylinders 15 disposed at diagonally opposed positions, and spray tubes 16 are provided for the respective back surfaces of said members 14 so as to cool the cast piece supporting and cooling members 14 by direct spraying.
  • FIG. 5 An alternative modification of the subject apparatus as applied to a slab cast piece 22 having a large crosssection, is illustrated in FIG. 5.
  • the slab cast piece 22 has its wider opposed side surfaces only supported by guide bars 17 mounted on movable frame members 18, and the guide bars 17 are pressed against and separated from the cast piece 22 via said movable frame members 18 by the actuation of hydraulic cylinders 19.
  • the cooling of the cast piece 22 is carried out by directly spraying coolant water against the surface of the cast piece by means of nozzles provided on spray tubes 20 and on the movable frame members 18.
  • a cast piece supporting apparatus for a continuous casting machine for drawing the cast piece comprising:
  • said means connected to said mold including means for regulating the speed of descent of the mould to equalize the speed of descent of the mould with the selected speed 'of drawing of the cast piece;
  • cast piece supporting means including plate means engageable with the periphery of the cast piece adjacent where the cast piece issues from the mould;
  • cooling means include cooling fluid spray nozzle means aimed to spray cooling fluid on the plate means of the casting piece support means.
  • cooling means include cooling fluid spray nozzle means aimed to spray cooling fluid directly on the cast piece.
  • cooling means including cooling fluid spray nozzle means aimed to spray cooling fluid on the four plates and between adjacent plates directly onto the cast piece.
  • the cast piece supporting apparatus of claim 1 wherein the mould is of rectangular internal transverse cross-section and the plate means are constituted by two'L-shaped plates each positioned to engage two adjacent corresponding sides of the cast piece.
  • the means for cyclically raising the mould and for permitting the mould to descend and the means for laterally moving the plate means comprise hydraulic piston and cylinder means arranged in a hydraulic fluid circuit having means for pressurizing the hydraulic fluid and valving for controlling the direction of movement of the piston means within the cylinder means; the valving including limit switch means for ascertaining when the mould has been raised to said upper posit-ion and when the mould has descended to said lower position, and for switching said valving in response to such ascertainment; and wherein the regulating means includes control valve means adjustable to control the flow of the hydraulic fluid for adjusting the resistance the hydraulic fluid presents to descent of the mould whereby the rate of descentof the mould may be equalized with the selected drawing speed;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US419101A 1972-12-18 1973-11-26 Cast piece supporting apparatus for a continuous casting machine Expired - Lifetime US3882924A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12618372A JPS4983619A (enrdf_load_stackoverflow) 1972-12-18 1972-12-18
JP11468773A JPS5065421A (enrdf_load_stackoverflow) 1973-10-15 1973-10-15

Publications (1)

Publication Number Publication Date
US3882924A true US3882924A (en) 1975-05-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
US419101A Expired - Lifetime US3882924A (en) 1972-12-18 1973-11-26 Cast piece supporting apparatus for a continuous casting machine

Country Status (4)

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US (1) US3882924A (enrdf_load_stackoverflow)
CA (1) CA994980A (enrdf_load_stackoverflow)
CH (1) CH572775A5 (enrdf_load_stackoverflow)
DE (1) DE2361101B2 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996995A (en) * 1974-11-28 1976-12-14 Davy International Limited Continuous casting mould
US4088179A (en) * 1975-04-21 1978-05-09 Hitachi, Ltd. Cooling guide system for continuous casting machine
FR2375932A1 (fr) * 1976-12-30 1978-07-28 Concast Ag Lingotiere pour la coulee continue de billettes et de blooms d'acier
US4214623A (en) * 1978-07-05 1980-07-29 Witteman Steel Mills Method for continuous casting of metal
US4480976A (en) * 1982-03-03 1984-11-06 Benteler-Werke Ag Adjustable sliding mold for continuous casting installations
US4537241A (en) * 1982-02-25 1985-08-27 Sumitomo Heavy Industries, Ltd. Metal supporting structure for continuous casting machines
US4567934A (en) * 1983-02-28 1986-02-04 Kabushiki Kaisha Kobe Seiko Sho Cooling mechanism for use in continuous metal casting
US4685506A (en) * 1981-01-27 1987-08-11 Danieli & C. Officine Meccaniche S.P.A. Billet launching device in continuous casting machines
EP0367024A1 (en) * 1988-10-31 1990-05-09 DANIELI & C. OFFICINE MECCANICHE S.p.A. Apparatus for the continuous casting of metals and of steel in particular
US6024161A (en) * 1997-04-08 2000-02-15 Mitsubishi Heavy Industries, Ltd. Billet continuous casting machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10218844B3 (de) * 2002-04-27 2004-01-22 Ostermeyer, Günther Vorrichtung zum Stranggiessen von Rohren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284503A (en) * 1939-09-14 1942-05-26 Himself And Julia Lce Cox Will Apparatus for continuous casting
US2818616A (en) * 1954-07-15 1958-01-07 Continuous Metalcast Co Inc Apparatus for the continuous casting of metals
US3167829A (en) * 1962-02-20 1965-02-02 Concast Ag Apparatus for continuous casting of metal
US3515202A (en) * 1966-08-20 1970-06-02 Paderwerk Gebr Benteler Schlos Method for continuous casting of metal ingots
US3516479A (en) * 1966-10-26 1970-06-23 Mannesmann Ag Water cooled continuous casting mold
US3730257A (en) * 1971-06-24 1973-05-01 Koppers Co Inc Continuous casting sleeve mold

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284503A (en) * 1939-09-14 1942-05-26 Himself And Julia Lce Cox Will Apparatus for continuous casting
US2818616A (en) * 1954-07-15 1958-01-07 Continuous Metalcast Co Inc Apparatus for the continuous casting of metals
US3167829A (en) * 1962-02-20 1965-02-02 Concast Ag Apparatus for continuous casting of metal
US3515202A (en) * 1966-08-20 1970-06-02 Paderwerk Gebr Benteler Schlos Method for continuous casting of metal ingots
US3516479A (en) * 1966-10-26 1970-06-23 Mannesmann Ag Water cooled continuous casting mold
US3730257A (en) * 1971-06-24 1973-05-01 Koppers Co Inc Continuous casting sleeve mold

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996995A (en) * 1974-11-28 1976-12-14 Davy International Limited Continuous casting mould
US4088179A (en) * 1975-04-21 1978-05-09 Hitachi, Ltd. Cooling guide system for continuous casting machine
FR2375932A1 (fr) * 1976-12-30 1978-07-28 Concast Ag Lingotiere pour la coulee continue de billettes et de blooms d'acier
US4136728A (en) * 1976-12-30 1979-01-30 Concast Ag Continuous steel casting mold for billets and blooms
US4214623A (en) * 1978-07-05 1980-07-29 Witteman Steel Mills Method for continuous casting of metal
US4685506A (en) * 1981-01-27 1987-08-11 Danieli & C. Officine Meccaniche S.P.A. Billet launching device in continuous casting machines
US4537241A (en) * 1982-02-25 1985-08-27 Sumitomo Heavy Industries, Ltd. Metal supporting structure for continuous casting machines
US4480976A (en) * 1982-03-03 1984-11-06 Benteler-Werke Ag Adjustable sliding mold for continuous casting installations
US4567934A (en) * 1983-02-28 1986-02-04 Kabushiki Kaisha Kobe Seiko Sho Cooling mechanism for use in continuous metal casting
EP0367024A1 (en) * 1988-10-31 1990-05-09 DANIELI & C. OFFICINE MECCANICHE S.p.A. Apparatus for the continuous casting of metals and of steel in particular
US6024161A (en) * 1997-04-08 2000-02-15 Mitsubishi Heavy Industries, Ltd. Billet continuous casting machine
US6321829B1 (en) * 1997-04-08 2001-11-27 Mitsubishi Heavy Industries, Ltd. Billet continuous casting machine and casting method

Also Published As

Publication number Publication date
CA994980A (en) 1976-08-17
DE2361101A1 (de) 1974-06-27
CH572775A5 (enrdf_load_stackoverflow) 1976-02-27
DE2361101B2 (de) 1976-09-23

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