US3365791A - Metal casting and rolling - Google Patents

Metal casting and rolling Download PDF

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Publication number
US3365791A
US3365791A US495196A US49519665A US3365791A US 3365791 A US3365791 A US 3365791A US 495196 A US495196 A US 495196A US 49519665 A US49519665 A US 49519665A US 3365791 A US3365791 A US 3365791A
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United States
Prior art keywords
casting
billets
billet
rolling
metal
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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
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US495196A
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English (en)
Inventor
Olsson Erik Allan
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ERIK OLSSON AG
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Olsson Ag Erik
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Publication date
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/22—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting, i.e. in-line rolling of steel
    • 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
    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B2001/081—Roughening or texturing surfaces of structural sections, bars, rounds, wire rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • 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
    • B21B39/006—Pinch roll sets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49989—Followed by cutting or removing material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • This invention relates to the continuous casting of metal and the subsequent rolling thereof, and is for an improved method for more effectively utilizing continuous casting in the making of billets for rolling into small sections, such as rods and bars.
  • Bi'ilets for the manufacture of rods and like small sections are generally continuously cast in a square shape for rolling in the customary manner down to rod and bar sections.
  • the emerging square billet from the continuous casting mold is run out to a standard billet length and cut off and thereafter rolled and elongated in the disection of the axis of the billet.
  • Billets for conversion into plates and sheets are continuously cast in billets of rectangular section in which the width exceeds many times the thickness of the billet.
  • the emerging casting is likewise cut oil to form slabs of predetermined length which are also subsequently rolled in the direction of the length of the original casting.
  • a square billet of a size adaptable for rod rolling can only be cast at a rate varying between 12 to 25 tons per hour because of the limited volume of the mold and the rate at which the metal can be cooled.
  • a rectangular billet,having a width many times its thickness can be cast at a much higher rate because of the greater mold capacity and because the distance which heat must travel from the center of the casting to the mold walls does not increase in the direction of the width of the casting.
  • a rectangular billet 260 mm. x 2000 mm. may be cast at a rate of 100 tons per hour, which is from our to live timt s the rate at which a square billet 200 x 200 mm. can be cast.
  • the present invention provides an improvement wherein the metal is cast in a rectangular shape, the width of which is many times the thickness, thereby gaining the advantage of a high tonnage rate with a single strand, followed by cuttin the emerging casting transversely of its length into substantially square or other billet sections where the transverse dimension of the casting becomes the long direction of each individual billet. That is the width of the casting exceeds several times the length of the section which is cut oil. These individual sections are then rolled in the direction of their length which is at right angles to the direction of the length of the emerging casting. In this manner individual square or other billets of small section are formed in rapid succession for 3,3hjilll Patented Jan. 36, 1968 rolling, and they may be rolled while still hot, or put aside, cooled, dressed, reheated and rolled.
  • An object of the invention is to provide an improved method of continuously casting and thereafter rolling metal, particularly steel, into rods and similar small sections.
  • a further object is to provide an improved method of forming billets for rolling into rods, wires, and like products of small cross-sectional area.
  • FIG. 1 is a conventional illustration of a continuous casting plant and rolling mill for practicing the invention
  • FIG. 2 is a conventional illustration of another form of continuous casting apparatus with which the invention is adapted to be used;
  • FIG. 3 is a perspective view of a billet such as may be produced by the practice of the present invention.
  • FIG. 4 is a schematic view showing in transverse section a pair of rolls engaging the billet for forming identations in the billet prior to the complete severence of th individual sections;
  • FIG. 5 is a view similar to FIG. 4 showing a modification of the rolls where the billet is to be subjected to profile rolling, as for example where it is to be reduced to an l-section.
  • FIG. 1 there is schematically shown a continuous casting plant adapted to cast a vertical strand.
  • Casting plants of the type herein illustrated are well known in the art and form no part per se of the present invention.
  • molten metal is supplied to an open-ended water-cooled mold 2 having an elongated casting opening 3.
  • the resulting casting of rectangular section which has a width substantially exceeding its thickness, passes through a secondary cooling zone 5 wherein the casting is caused to be solidified completely by water from spray nozzle 6.
  • the casting is withdrawn by pinch rolls 7 and passed through a shear 3.
  • the shear While the casting is still at a high heat, that is, at a red heat or higher, the shear operates at regular intervals to cut the strand into successive individual billets which may have a substantially square cross-sectional area, these billets being designated 9 in FIG. 1.
  • the length of the continuous casting sheared oil at each operation is exceeded many times by its width.
  • the individual billets then have their long axes transverse to the direction in which. the strand is cast.
  • the individual billets so formed may then be passed through a rolling mill as conventionally illustrated at 10, and which may be of any known or preferred construction, usually having a succession of roll passes in which the billet is reduced to a rod, bar, or other small section.
  • the billets produced in the manner described are not rolled in the casting direction, but transverse to the direction in which the casting is formed. As above indicated, the severing of the casting and subsequent rolling in this manner does not impair the metallurigcal properties of the finished metal.
  • the rectangular continuous casting may have a thickness of 200 mm. and a width of 2 meters, the width then being ten times the thickness, and the emerging continuous casting may be severed at intervals of about 200 mm., so that the resulting individual billets are about 200 mm. square and 2 meters in length. These dimensions are illustrative and set forth only as disclosing one specific procedure.
  • the rolls 7 or the shear 8 may be so contoured as to shape the leading end of each billet by applying pressure in a plane normal to the wide face of the 3 casting along that edge of the casting which will form the leading end of the billet. This will facilitate the entrance of the billet into the rolling mill.
  • FIG. 1 shows a conventional way of making the billets, wherein the casting moves vertically downward
  • the invention is applicable to casting methods presently known to the art where the emerging strand is bent to a horizontal direction or is originally cast into an arcuate shape. In such case it is not necessary to straighten the strand, but the billet-length sections can be cut at any point along the are as illustrated in FIG. 2, wherein similar reference numerals have been used to designate corresponding parts.
  • the shear itself may be of a conventional type having opposed blades, and which is suspended to travel with the casting as is well known in the art, moving down with the casting as the shearing operation is effected, and then being raised to the starting position for the next cycle of operation. Traveling shears of this type have heretofore been used, but not in the manner herein described, and it is contemplated that instead of a traveling shear, some other cut-off device presently known to the art may be used, as for example a saw.
  • any beads or deformation can be removed by oxygen planing, or in a conventional manner by burning with cutting burners, milling, chiseling, or the like.
  • FIG. 3 shows the deformation in a somewhat exaggerated form.
  • one pair of pinch rolls 7 which are illustrated as being power-driven, may be provided with axially-extending ribs on the periphery thereof as shown in FIG. 4.
  • the ribs 7' of the opposed rollers coming'into conforming relation against the surface of the casting form grooves in the opposite surfaces of the casting at regular intervals along which the cutting or shearing may be subsequently effected.
  • these rollers instead of being one pair of the pinch rolls shown in FIG. 1, may be provided in addition to the pinch rolls of FIG. 1.
  • FIG. 5 there is shown another modification of these rolls 7 wherein the periphery of the rolls, in addition to being provided with ribs 7', are also provided with wider ribs 7a.
  • the purpose of this is to not only indent the continuously-cast billet along the lines of severance, but to form an indentation for profile rolling, as for example the web-forming portion of an I-beam section.
  • I have shown ribs 7 and 712 on the same pair of rolls, but the ribs 7a could be formed on separate rolls.
  • the casting operation may be so controlled that when the indentations are rolled into the casting, the metal may not have completely solidified.
  • the method of casting and rolling metal which comprises (a) continuously casting molten metal into a formed casting of rectangular section the width of which is many times its thickness,
  • a method of making billets adapted to be rolled into rods or other product of small section by continuous casting comprising 1 (a) casting molten metal in a rectangular open-end mold and forming a casting of rectangular crosssection,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
US495196A 1964-10-15 1965-10-12 Metal casting and rolling Expired - Lifetime US3365791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1243264 1964-10-15

Publications (1)

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US (1) US3365791A (da)
BE (1) BE670606A (da)
DE (1) DE1483618A1 (da)
DK (1) DK114792B (da)
FI (1) FI45423C (da)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499212A (en) * 1966-11-10 1970-03-10 Texas Instruments Inc Method of producing printing plates
US3648359A (en) * 1969-12-30 1972-03-14 Jones & Laughlin Steel Corp Working of continuously cast metal strand
US3698070A (en) * 1969-09-25 1972-10-17 Cefilac Method of fabricating seamless steel pipes
US3722575A (en) * 1972-05-25 1973-03-27 Steel Corp Method for removing an aborted casting from a continuous-casting machine
US3727292A (en) * 1969-12-09 1973-04-17 Monsanto Co Method of fabricating a non-woven sheet from extruded metal filaments
JPS501108A (da) * 1973-05-04 1975-01-08
DE2757071A1 (de) * 1976-12-22 1978-07-06 Doneckij Politekhn I Donezk Verfahren zum walzen von knueppeln
US4202089A (en) * 1978-06-02 1980-05-13 The Singer Company Splat-cooled instrument flexure and method to fabricate same
US4518028A (en) * 1980-04-28 1985-05-21 Aluminium Pechiney Process and apparatus for obtaining stackable auto-clamping blocks
US4844145A (en) * 1987-11-03 1989-07-04 Steel Metallurgical Consultants, Inc. Bending of continuously cast steel with corrugated rolls to impart compressive stresses
WO2002064288A1 (de) * 2001-02-09 2002-08-22 Sms Demag Aktiengesellschaft VERFAHREN UND VORRICHTUNG ZUM VERGIEssEN UND ERSTARREN VON FLÜSSIGEM METALL UND DESSEN ZERTEILUNG

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209452A (en) * 1961-05-05 1965-10-05 Moossche Eisenwerke Ag Method of producing bars or sections by continuous casting
US3292217A (en) * 1961-08-10 1966-12-20 Arnold H Boehm Continuous casting and forming process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209452A (en) * 1961-05-05 1965-10-05 Moossche Eisenwerke Ag Method of producing bars or sections by continuous casting
US3292217A (en) * 1961-08-10 1966-12-20 Arnold H Boehm Continuous casting and forming process

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499212A (en) * 1966-11-10 1970-03-10 Texas Instruments Inc Method of producing printing plates
US3698070A (en) * 1969-09-25 1972-10-17 Cefilac Method of fabricating seamless steel pipes
US3727292A (en) * 1969-12-09 1973-04-17 Monsanto Co Method of fabricating a non-woven sheet from extruded metal filaments
US3648359A (en) * 1969-12-30 1972-03-14 Jones & Laughlin Steel Corp Working of continuously cast metal strand
US3722575A (en) * 1972-05-25 1973-03-27 Steel Corp Method for removing an aborted casting from a continuous-casting machine
JPS501108A (da) * 1973-05-04 1975-01-08
DE2757071A1 (de) * 1976-12-22 1978-07-06 Doneckij Politekhn I Donezk Verfahren zum walzen von knueppeln
DE2757071B2 (de) * 1976-12-22 1980-09-25 Centralnyj Nautschno-Issledovatelskij Institut Tschernoj Metallurgii Imeni I.P. Bardina, Moskau Verfahren zum Herstellen gleichzeitig mehrerer Knüppel
DE2757071C3 (de) * 1976-12-22 1981-06-25 Central'nyj naučno-issledovatel'skij institut černoj metallurgii imeni I.P. Bardina, Moskva Verfahren zum Herstellen gleichzeitig mehrerer Knüppel
US4202089A (en) * 1978-06-02 1980-05-13 The Singer Company Splat-cooled instrument flexure and method to fabricate same
US4518028A (en) * 1980-04-28 1985-05-21 Aluminium Pechiney Process and apparatus for obtaining stackable auto-clamping blocks
US4844145A (en) * 1987-11-03 1989-07-04 Steel Metallurgical Consultants, Inc. Bending of continuously cast steel with corrugated rolls to impart compressive stresses
WO2002064288A1 (de) * 2001-02-09 2002-08-22 Sms Demag Aktiengesellschaft VERFAHREN UND VORRICHTUNG ZUM VERGIEssEN UND ERSTARREN VON FLÜSSIGEM METALL UND DESSEN ZERTEILUNG

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Publication number Publication date
DK114792B (da) 1969-08-04
FI45423B (da) 1972-02-29
BE670606A (da) 1966-01-31
DE1483618A1 (de) 1969-09-18
FI45423C (fi) 1972-06-12

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