US3628594A - Apparatus for reducing the cross section of a continuous cast strand - Google Patents

Apparatus for reducing the cross section of a continuous cast strand Download PDF

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Publication number
US3628594A
US3628594A US790608A US3628594DA US3628594A US 3628594 A US3628594 A US 3628594A US 790608 A US790608 A US 790608A US 3628594D A US3628594D A US 3628594DA US 3628594 A US3628594 A US 3628594A
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United States
Prior art keywords
strand
shaft
units
pair
roller
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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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US790608A
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English (en)
Inventor
Kurt Reinfeld
Emmanuel V Gouye
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Raymond Kaiser Engineers Inc
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Koppers Co Inc
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Assigned to RAYMOND KAISER ENGINEERS INC., A CORP OF OHIO reassignment RAYMOND KAISER ENGINEERS INC., A CORP OF OHIO ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KOPPERS COMPANY, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • 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
    • B21B13/06—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically, e.g. edgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/22—Hinged chocks
    • 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

  • Williams ABSTRACT Apparatus for reducing the cross section of a continuous cast strand includes pairs of powered rollers disposed in horizontal planes, and pairs of powered rollers, disposed in vertical planes on opposite sides of the continuous cast strand.
  • the strand passes between the roll pairs which are moved together by fluid-actuated cylinder piston mechanisms to reduce the vertical and horizontal cross-sectional dimensions of the cast strand.
  • the center core of the billets obtained by this casting process frequently have undesirable center core porosities and segregations. Also, a high rate of production of small billet sections requires either a large number of cast strands or a difficulty controlled high-casting speed per strand at or near the point of complete solidification of the strand center core, before the cast strand is cut into billets.
  • in-line reduction refers to the fact that the cross-sectional dimensions of the cast strand are physically reduced, and the strand is elongated by the apparatus of the invention while the strand is moving steadily in a line from one portion of a continuous casting machine to another portion.
  • Apparatus for reducing the cross-sectional dimensions of a continuous cast strand comprises a pair of units pivotally mounted on opposite sides of the cast strand; each such unit including a hollow shell that is journaled to a shaft about which the shell pivots; a roller is journaled to each shell and the opposed pair of rollers is adapted to contact the sides of the cast strand when the units are moved toward each other in a controlled manner.
  • FIG. 1 is a schematic view of a continuous casting machine including one embodiment of invention in accordance with the invention
  • FIG. 2 is a schematic perspective view of the embodiment of invention shown in FIG. 1;
  • FIG. 3 is a sectional view along line III-III of FIG. 2;
  • FIG. 4 is a sectional view along line IV-IV of FIG. 3;
  • FIG. 5 is a schematic elevational view of a first modification of the invention.
  • FIG. 6 is a sectional view along line VI-VI ofFIG. 5;
  • FIG. 7 is a schematic elevational view of a second modification of the invention.
  • FIG. 8 is a schematic modification of a portion of the apparatus of FIG. 1.
  • FIG. 1 illustrates a continuous casting machine 10 including in-line continuous cast strand reducing apparatus 11 (FIG. 2) in accordance with the invention.
  • the apparatus 11 includes a first assembly 13, and a second assembly 15 spaced apart from the first assembly 13.
  • first 17 and second 19 housing units are substantially like the third 27 and the fourth 29 housing units, the following description of the first housing unit 17 suffices as a description of the other housing units ll9, 27,.and 29.
  • First housing unit 17 (FIG. 3) includes a frame or a hollow shell 31 to which are journaled a plurality of shafts and gears. As viewed in FIG. 4, the left-hand end of the shell 31 is journaled to a vertical pivot shaft 33 that is journaled at the bottom to a suitable support 35.
  • a horizontally arranged fluid piston motor 37 Adjacent the vertical pivot shaft 33, there is a horizontally arranged fluid piston motor 37 that may be similar to the type of piston motor manufactured and marketed by Vickers Division of Sperry Rand Corporation.
  • the fluid piston motor 37 has a power output worm 39 that is suitably journaled as at 41 to the shell 31.
  • the power output worm 39 meshes with a worm gear 43 that is fixed to the lower end portion of a vertical shaft 45.
  • the vertical shaft 45 is journaled both at the bottom, in a bearing 47 mounted in the shell 31, and at the top, in a bearing 49 mounted in a cover 51 that is removably secured, as by capscrews 53, to the shell 31.
  • the upper portion of the shaft 45 is formed as a spur gear 55 that meshes with a driven gear 57 mounted to another vertical shaft 59 that is substantially parallel to the vertical shaft 45.
  • Shaft 59 is journaled both at the top in a bearing 61 mounted in the cover 51, and at the bottom in a bearing 63 mounted in the shell 31.
  • the lower end portion of the shaft 59 includes a pinion 65 that meshes with a shaft-mounted idler gear 67 suitably journaled in top and bottom bearings 69 that are mounted in the shell 31, as suggested in FIG. 4.
  • the idler gear 67 also meshes with a drive gear 71 mounted to a vertical shaft 73 that is substantially parallel to the other vertical shafts 45 and 59.
  • the vertical shaft 73 is journaled at the bottom in a bearing 75 mounted in the shell 31 and, at the top, in a bearing 77.
  • the shaft 73 also carries a shaped, billetreducing roller 79 that is located in an opening 81 in the shell 31, so that opposed rollers 79, of adjacent pivotable housing units 17, 19, can coact on a continuous cast strand, such as strand 101 passing between such rollers.
  • the top bearing 77 is mounted in a bearing block 78 that is removably mounted to the shell 31 in such a way that both the bearing 77 and the bearing block 78 can be quickly and easily removed from the shell 31.
  • the bearing block 78 is provided with a cover 78a, secured thereto as by lifting eyebolts 78b or in any other suitable manner, and a nut 78c is threaded onto the upper end of the shaft 73 having a reduced cross section at its upper end portion.
  • the upper end portion of the shaft 73 is provided with internal lubricating oil or grease passage (not shown) and a quickdisconnect hose assembly 78d is attached to the shaft upper end, as shown in FIG. 4.
  • roller 79 When it is desired to change the roller 79, only the hose assembly 78d, the nut 780 have to be removed and then the bearing 77 and bearing block 78 may be removed. After the spacer ring 78e is removed, the roller 79 may then be easily and quickly removed. A new roller may thereafter be installed and the other units reinstalled.
  • the frame or shell 31 is provided with both upper 83 and lower 85 outwardly projecting clevises, each of which is adapted to cooperate with a tongue portion 87 of a piston rod 89 that extends out of a cylinder-piston assembly 91.
  • cylinder-piston 91 also has a tongue portion 93 that cooperates with each of both upper 95 and lower 97 clevises of the cooperative second housing 19.
  • the first assembly 13 is spaced a short distance apart from the second assembly 15, as shown in FIG. 2, and between the two assemblies 13, 15, there is a transition or guide piece 99 surrounding a continuous cast strand 101 passing through the apparatus 11.
  • a transition or guide piece 99 surrounding a continuous cast strand 101 passing through the apparatus 11.
  • the guide roller 103 supports the cast strand 101 in passing from the second assembly 15 through the transition or guide piece 99 into the first assembly.
  • a continuous cast strand 101 In operation of the continuous casting machine 10, a continuous cast strand 101, after being bent and straightened in apparatus 129 so that it moves in a substantially horizontal plane, enters the apparatus 11 through a guide 107.
  • the cast strand 101 then passes between two horizontal rollers 79 that are mounted to shafts 109 and 111 of the second unit 15.
  • the horizontal rollers 79 move toward each other when the pair of fluid-actuated cylinder pistons 113 are activated, whereby the continuous cast strand 101 is reduced in thickness.
  • the horizontal rollers 79 are driven by power supplied to the piston motors 115, 1 17, that are like the piston motor 37.
  • the continuous cast strand 101 passes between the vertical rollers 79 that are likewise movable toward each other so that the cast strand is now reduced in width.
  • the rollers 79 are driven by the powered piston motors 37 acting through the gear trains, described herein, located inside the housing 17 and 19.
  • the third housing 27 is provided with a fixed stop 119 and the fourth housing 29 is provided with an upright arm 120 which coacts with the fixed stop 119 to prevent the horizontal rollers 79 from touching each other when the cylinder-piston assemblies 113 are not under pressure.
  • the first 17 and second 19 housings being pivotable about vertical axes, do not require the same positive stop 119 and cooperative arm 120 which are associated with the third 27 and fourth 29 housings.
  • molten metal 121 flows from a tundish 122 into a vertically reciprocable mold 123 wherein the cast strand 101 is continuously formed.
  • the continuous cast strand 101 is withdrawn from the mold 123 by powered pinch rollers 124, and the strand passes through a spray chamber 125 wherein cooling water is directed onto the surface of the strand 101.
  • the cast strand 101 is urged in the usual manner by rollers (not shown) toward the horizontal, and is supported by rollers 127 of an arcuate apron structure.
  • the arcuate strand 101 passes into a straightener device 129 wherefrom it emerges in a horizontal plane.
  • the cast strand 101 Upon emerging from the straightener apparatus 129, the cast strand 101 enters the in-line" reduction apparatus 11 described hereinbefore and both the vertical and the horizontal dimensions of its cross section are reduced.
  • FIG. illustrates a modification of the apparatus 11 described herein and includes another form of straightener apparatus 131 disposed between an initial in-line reduction assembly 133 and a secondary in-line reduction assembly 135.
  • the initial in-line reduction assembly 133 includes the same pivoted housing units 137, 139, each supporting a horizontal reduction roller 141; the housing units 137, 139 being pivoted at pins 143 to a support frame 145 bolted to a base 146.
  • the secondary in-line reduction assembly 135 is substantially identical with the first in-line reduction assembly 13 described previously herein except that the support 145 is adapted to pivotally support opposed pairs of arms 147, 149.
  • the support frame 145 also supports a horizontal roller 151 which functions in the manner of roller 103 mentioned previously.
  • the secondary in-line reduction assembly likewise includes a pair of opposed vertical reduction rollers 153 that are similar to the rollers 79.
  • pairs of pivoted arms 147, 149 are journaled to a common shaft 155 and first cylinder-piston assemblies 157 interconnect arms 147 to arms 149, while second cylinder-piston assemblies 159 interconnect arms 149 and a support 161 to which the assembly 135 is bolted. Pairs of arms 147, 149 are disposed on opposite sides of the apparatus 131.
  • Each arm 147, 149 of the opposed pairs of arms are interconnected by a structural member, such an an l-beam 163, to provide rigidity to the arms 147, 149. Between each pair of opposed arms 147 and 149, there is journaled a roller 165.
  • the pair of rollers 165 are arranged to be on a single arc having a center in the pivot shaft 155.
  • each roller is mounted to a shaft 167 (FIG. 6) having a reduced diameter upper end above the roller 153.
  • a bearing 169 coacts with the shaft 167 and with a bearing housing 171 that is removably mounted in each one of the pivoted units comprising the assembly 135.
  • a spacer ring 173 cooperating with the shaft 167 and the bearing 169 to maintain the shaft centered in the bearing housing 171.
  • the upper end portion of the shaft 167, above the top of the bearing 169 is threaded as at 174 and coacts with a nut 175 having a projecting arm 177.
  • the nut 175 is provided with seal ring 179 that coacts with a cover 181 that is secured in a known manner to the top of the bearing housing 171 to seal the bearing housing 171.
  • the nut 175 also engages the bearing 169 to hold the bearing and its housing 171 in cooperative relation.
  • the cast strand 101 enters the unit 137 which has been arranged so that the rolls 141 are spaced apart wide enough to freely pass the head end of the curved strand.
  • the head end of the strand also passes between the rollers 165 which are elevated by the cylinder-piston assembly 159.
  • the rolls 141 may be brought together by actuating the cylinder-piston assemblies 113 to reduce the thickness of the cast strand 101.
  • the width of the cast strand may be controlled by varying the apart spacing of the vertical rollers 153 as described hereinbefore.
  • the unit 137 also may serve as a withdrawal set of rollers and, when operated as such, the withdrawal or pinch rollers 124 are not required. As soon as the rollers 141 have been brought into engagement with the cast strand 101, the both reduce the vertical dimension of the cross section of the strand and withdraw and strand from the mold of the casting machine.
  • FIG. 7 illustrates another modification of the way in which the reducing rollers may be mounted in a frame or housing, such as housing 183.
  • Housing 183 is similar to the housings 17, 19, 27, 29, except that a reduction roller 185 is mounted to the upper end of a shaft 189 and not intermediate the ends of the shaft 73, as shown and described previously.
  • the housing 183 supports the same gearing and shafting as the frame or shell 31 illustrated in FIGS. 3, 4 and described herein.
  • the reduction roller 185 is cantilever mounted at one end of a reduced diameter shaft portion 189, and rests against a shoulder 191 of the shaft 187.
  • a pair of rotatable roller-retaining lugs 193 are secured to the shaft 187 by capscrews 195, and when the retaining lugs 193 are not engaging the roller 185, as shown in FIG. 7, the roller 185 may be easily and quickly removed from the shaft end 189. So, too, a new roller may be easily and quickly installed on the shaft end 191, and then the retaining lugs 193 can be rotated so as to engage the roller, as shown in FIG. 7, and the capscrews 195 may be tightened to secure the roller 185 in place on the shaft end 191.
  • the unit 15 serves as a reducing and withdrawing set of rollers that take the place of the pinch rollers 124.
  • the unit 15 When the unit 15 is operated in this manner the head end of the cast strand 101 initially passes freely through the rollers under the influence of a conventional starting bar like starter bar 102 of FIG. 5.
  • the roller 197 is moved downward by the cylinder piston 199, the strand coacts with roller 103 and the cast strand is disconnected from a starter bar such as bar 102.
  • the cast strand is supported by the roller 103 and is directed horizontally into the reducing unit 13.
  • the in-line reducing apparatus of the invention is simple in operation and is adaptable to reduce the cross-sectional dimensions of a continuous cast strand in only one direction or in two directions as preferred;
  • the in-line reduction equipment of the invention achieves an increase in output production per cast strand of a given cross section, and a considerable improvement in product quality and as a result of rewelding the porous central region of the strand by compression;
  • the carbon segregation and other segregations in the center core of the cast strand are significantly reduced after passing through the in-line reduction equipment of the present invention.
  • each such unit comprising: i. a support,
  • b. means disposed between said first and said second pairs of units engageable with said strand to disconnect said strand from said starter bar and to direct said cast strand toward said second pair of units including: i. a pair of arms pivoted about a common axis, ii. a roller supported by each arm, iii. an abutment fixed in relation to said axis, and iv. means to move said pair of arms about said common axis for causing said rollers to engage said strand and urge it into engagement with said fixed abutment so the strand is bent downward to extend substantially horizontal.
  • the invention of claim 1 including: a. means for pivoting one of said arms relative to the other arm. 3. in the apparatus of claim 1, the improvement comprising: a. means for quickly releasing and disconnecting said roller to said second shaft. 4. The invention of claim 1 wherein: a. said roller is cantilever mounted to said shaft, and includin b. m eans to quickly detach and secure said roller to said shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
US790608A 1969-01-13 1969-01-13 Apparatus for reducing the cross section of a continuous cast strand Expired - Lifetime US3628594A (en)

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US79060869A 1969-01-13 1969-01-13

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CA (1) CA933329A (es)
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GB (1) GB1258735A (es)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946587A (en) * 1973-12-06 1976-03-30 Davy-Loewy Ltd. Rolling mills
FR2332075A1 (fr) * 1975-11-24 1977-06-17 Voest Ag Procede et dispositif pour la production de toles, en particulier de toles fortes de plus de 100 mm d'epaisseur
US4156453A (en) * 1975-12-17 1979-05-29 Vereinigte Osterreichische Eisen- und Stahlwerke - Alpoine Montan Aktiengesellschaft Driving roll stand
US4198841A (en) * 1977-07-26 1980-04-22 Barkov Leonid A Roll mill stand
US4280552A (en) * 1978-06-23 1981-07-28 Voest-Alpine Aktiengesellschaft Driving roll stand for a continuous casting plant
US5360054A (en) * 1991-10-11 1994-11-01 Kawasaki Jukogyo Kabushiki Kaisha Method and apparatus for performing horizontal continuous casting
US6920772B1 (en) 2003-02-12 2005-07-26 Morgan Construction Company Pinch roll unit

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US538268A (en) * 1895-04-30 Pipe-rolling machine
US2042872A (en) * 1935-02-18 1936-06-02 United Eng Foundry Co Backing roll chuck latch
US2599414A (en) * 1946-05-24 1952-06-03 Aetna Standard Eng Co Adjustable roll support
US3157920A (en) * 1962-04-03 1964-11-24 Concast Ag Continuous casting plant with deflection of the casting
US3190098A (en) * 1959-02-16 1965-06-22 British Iron Steel Research Cantilever rolling mill
DE1213962B (de) * 1962-07-04 1966-04-07 Demag Ag Anfahrbolzen fuer Stranggiessanlagen
US3344844A (en) * 1964-08-10 1967-10-03 Koppers Co Inc Apparatus for handling a curved continuous casting starting bar
US3358358A (en) * 1964-12-31 1967-12-19 United States Steel Corp Method of reducing width of metal slabs
US3370641A (en) * 1965-01-11 1968-02-27 United Eng Foundry Co Reciprocating mold and coolant-support section continuous casting machine
US3477268A (en) * 1967-02-03 1969-11-11 Voest Ag Device for shaping metal bars
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
US3543555A (en) * 1967-05-16 1970-12-01 Demag Ag Form changing device for continuous casting
US3554269A (en) * 1969-08-21 1971-01-12 Demag Ag Method of deforming and straightening a curved continuous casting strand

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US538268A (en) * 1895-04-30 Pipe-rolling machine
US2042872A (en) * 1935-02-18 1936-06-02 United Eng Foundry Co Backing roll chuck latch
US2599414A (en) * 1946-05-24 1952-06-03 Aetna Standard Eng Co Adjustable roll support
US3190098A (en) * 1959-02-16 1965-06-22 British Iron Steel Research Cantilever rolling mill
US3157920A (en) * 1962-04-03 1964-11-24 Concast Ag Continuous casting plant with deflection of the casting
DE1213962B (de) * 1962-07-04 1966-04-07 Demag Ag Anfahrbolzen fuer Stranggiessanlagen
US3344844A (en) * 1964-08-10 1967-10-03 Koppers Co Inc Apparatus for handling a curved continuous casting starting bar
US3358358A (en) * 1964-12-31 1967-12-19 United States Steel Corp Method of reducing width of metal slabs
US3370641A (en) * 1965-01-11 1968-02-27 United Eng Foundry Co Reciprocating mold and coolant-support section continuous casting machine
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
US3477268A (en) * 1967-02-03 1969-11-11 Voest Ag Device for shaping metal bars
US3543555A (en) * 1967-05-16 1970-12-01 Demag Ag Form changing device for continuous casting
US3554269A (en) * 1969-08-21 1971-01-12 Demag Ag Method of deforming and straightening a curved continuous casting strand

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946587A (en) * 1973-12-06 1976-03-30 Davy-Loewy Ltd. Rolling mills
FR2332075A1 (fr) * 1975-11-24 1977-06-17 Voest Ag Procede et dispositif pour la production de toles, en particulier de toles fortes de plus de 100 mm d'epaisseur
US4156453A (en) * 1975-12-17 1979-05-29 Vereinigte Osterreichische Eisen- und Stahlwerke - Alpoine Montan Aktiengesellschaft Driving roll stand
US4198841A (en) * 1977-07-26 1980-04-22 Barkov Leonid A Roll mill stand
US4280552A (en) * 1978-06-23 1981-07-28 Voest-Alpine Aktiengesellschaft Driving roll stand for a continuous casting plant
US5360054A (en) * 1991-10-11 1994-11-01 Kawasaki Jukogyo Kabushiki Kaisha Method and apparatus for performing horizontal continuous casting
US6920772B1 (en) 2003-02-12 2005-07-26 Morgan Construction Company Pinch roll unit

Also Published As

Publication number Publication date
ES372154A1 (es) 1972-01-16
CA933329A (en) 1973-09-11
GB1258735A (es) 1971-12-30
ES395002A1 (es) 1974-09-01

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Owner name: RAYMOND KAISER ENGINEERS INC., OAKLAND CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KOPPERS COMPANY, INC.;REEL/FRAME:004292/0615

Effective date: 19840503