US3753461A - Bending-roll unit for continuous-casting machine - Google Patents

Bending-roll unit for continuous-casting machine Download PDF

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Publication number
US3753461A
US3753461A US00208776A US3753461DA US3753461A US 3753461 A US3753461 A US 3753461A US 00208776 A US00208776 A US 00208776A US 3753461D A US3753461D A US 3753461DA US 3753461 A US3753461 A US 3753461A
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United States
Prior art keywords
roll
rolls
casting
idlers
opposed
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Expired - Lifetime
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US00208776A
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English (en)
Inventor
F Gallucci
G Wagner
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United States Steel Corp
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United States Steel Corp
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Assigned to USX CORPORATION, A CORP. OF DE reassignment USX CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES STEEL CORPORATION (MERGED INTO)
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    • 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

  • ABSTRACT A bending-roll unit for continuous-casting machines, where the unit directly follows a guide-r011 rack and precedes a curved r011 rack.
  • the unit embodies a combination of driven rolls and idlers arranged in opposed pairs.
  • One of the driven rolls is a fulcrum roll which defines the tangent line where a casting first acquires a curvature.
  • Other driven rolls above and below the ful crum roll sustain the reaction forces.
  • driven rolls also supply the initial tractive force which propels the casting and thus eliminate the need for separate driven pinch rolls usually located above the bending rolls.
  • Floating idlers confine the casting against bulging.
  • the unit may be used with either a flexible starter bar or slightly modified with a rigid bar.
  • liquid metal is poured through an open-ended watercooled vertically oscillating mold.
  • a casting which at this stage has only a relatively thin solidified skin and a liquid core, emerges continuously from the lower end of the mold.
  • the casting travels through a guide-roll rack, usually idlers, where water is sprayed on its surface to effect further solidification.
  • the mold is straight-sided, and the guide rolls define a vertical path of travel for the casting.
  • a starter bar which may be either flexible or rigid, is used to close the lower end of the mold.
  • the casting travels between bending rolls which impart a curvature to the casting, and thence through a curved roll-rack, which changes its direction of travel from vertical to horizontal. Thereafter the casting is straightened and severed to appropriate lengths. If a flexible starter bar is used, it usually travels through the bending rolls and curved roll-rack ahead of the casting and is disconnected from the leading end of the casting beyond the straightener. If a rigid bar is used, it is disconnected from the leading end of the casting ahead of the curved roll rack.
  • An object of our invention is to provide an improved bending-roll unit which embodies a combination of driven rolls, idler rolls joumaled on fixed axes, and floating idler rolls to confine the casting against bulging and at the same time apply a tractive force in a way to avoid damaging the casting.
  • a further object is to provide an improved bendingroll unit in which the bending rolls themselves are driven, whereby they also apply the initial tractive force for propelling the casting and eliminate the need for separate power-driven pinch rolls for this purpose, thus contributing to reduction of the machine height.
  • a further object is to provide an improved bendingroll unit in which the actual bending rolls include driven rolls and idlers arranged in opposed pairs interspersed with floating idlers to confine the casting.
  • FIG. 1 is a vertical section view of a bending-roll unit constructed in accordance with our invention for use with a flexible starter bar;
  • FIG. 2 is a horizontal half-section on line 11-11 of FIG. 1;
  • FIG. 3 is a horizontal half-section on line III-III of FIG. 1;
  • FIG. 4 is a horizontal half-section on line lV--IV of FIG. 1;
  • FIG. 5 is a partly diagrammatic side elevation view of a modified unit for use with a rigid starter bar.
  • FIG. 1 The embodiment of our bending-roll unit shown in FIG. 1 includes rigid spaced-apart upright frame members 10 fixed to a supporting structure 12.
  • the unit is installed in a continuous-casting machine directly below a guide-roll rack 13 and ahead of a curved rollrack 14, but we have not shown these parts in detail since they can be of conventional construction.
  • Our unit includes opposed pairs of rolls as follows from left to right and top to bottom: (a) a pair of idlers l7-l7a joumaled on fixed axes, (b) a shiftable driven roll 18 and an idler 18a joumaled on a fixed axis, (c) a pair of floating idlers l9-19a, (d) an idler 20 joumaled on a fixed axis and a shiftable driven roll 20a, (e) a pair of floating idlers 2l-21a, (f) a shiftable driven roll 22 and an idler 22a joumaled on a fixed axis, and (g) a pair of idlers 23-23a joumaled on fixed axes.
  • Rolls l7-l7a, 18-180, 20-20a, 22-22a, and 23-23a sustain the forces required to bend the casting. These rolls are illustrated as of relatively large diameter (for example 12 inches) to enable them to sustain such forces, but alternatively we can use smaller rolls equipped with back-up rolls, as in the modification shown in FIG. 5. Rolls 19-1911 and 2l-2la can be of smaller diameter (for example 8 inches), since they serve merely to maintain the casting in line with the force-sustaining rolls and prevent the skin from bulging. The function of the individual rolls is explained in detail hereinafter.
  • FIG. I shows diagrammatically a portion of a flexible starter bar 24, which can be conventional, and a casting C within our bending roll unit.
  • FIG. 2 shows the structure in which we journal the uppermost pair of idlers 1747a.
  • the structure in which we journal the lowermost pair 23-23a is similar;
  • Rolls 17 and 17a are joumaled in bearings 27 housed within chocks 28 and 28a respectively.
  • the inside face of the frame member 10 carries a fixed horizontal guideway 29.
  • the outer faces of chocks 28 and 28a carry tabs 30 which rest on this guideway.
  • the two checks are tied together with a pin 31 which extends through interfitting projec tions 32 and 32a on the chocks.
  • a transverse member 33 extends between the two frame members 10 at the left as viewed in FIG. 2 and is bolted thereto.
  • the transverse member carries a fixed abutment 34.
  • a plurality of bolts 36 extend through abutment 34 and shims 35 and into the wall of chock 28 to hold the assembly of the two chocks 28 and 28a in a fixed position.
  • FIG. 3 shows the structure in which we journal the upper pair of floating idlers 19-19a.
  • the structure in which we journal the lower pair 21-211: is similar; hence we do not repeat the showing.
  • Rolls 19 and 19a are joumaled in bearings 38 housed within chocks 39 and 39a respectively.
  • the inside face of the frame member 10 carries a fixed horizontal guideway 40.
  • the outer faces of checks 39 and 39a carry tabs 41 which rest on this guideway.
  • the two chocks are tied together with a pin 42 which extends through intermeshing projections 43 and 43a on the chocks.
  • a transverse member 44 extends between the two frame members 10 at the left as viewed in FIG. 3, and is bolted thereto.
  • the transverse member carries an abutment 45 to which we bolt a plate 46 and a plurality of shims 47 between the abutment and plate.
  • Guideway 40 has a stop 48 at the end opposite abutment 45.
  • the assembly of chocks 39 and 39a is free to move along guideway 40 within the limits permitted by engagement of chock 39 with plate 46 or by engagement of chock 39a with stop 48.
  • FIG. 4 shows the structure in which we journal the pair of rolls 20-20a. These rolls are joumaled in bearings 51 housed within chocks 52 and 52a.
  • the driven roll 20a has a neck 53 which extends from the chock and is connected to a suitable drive (not shown).
  • the inside face of the frame member carries a fixed horizontal guideway 54.
  • the outer faces of checks 52 and 52a carry tabs 55 which rest on this guideway.
  • a transverse member 56 extends between the two frame members 10 at the left as viewed in FIG. 4.
  • the transverse member 56 carries an abutment 57 to which we fix the chock 52 with a plurality of bolts 58.
  • Another transverse member 62 extends between the two frame members 10 at the right as viewed in FIG. 4, and carries a housing 63 and lug 64.
  • a fluid pressure cylinder 65 to lug 64.
  • the cylinder lies within housing 63 and contains a reciprocable piston and piston rod 66.
  • the free end of the piston rod to a movable transverse bar 67.
  • the bar carries an abutment 68, to which we fix the chock 52a with a plurality of bolts 69.
  • the structures in which we journal the pairs of rolls 18-18a and 22-22a are similar, except reversed, and we can omit the load cell. Hence we do not repeat the detailed showing, but in FIG. 1 identify corresponding parts with the same reference numerals.
  • the driven roll 20a defines the tangent line where the casting C first acquires a curvature.
  • the three pairs of rolls above the tangent line define a straight path for the casting and three pairs below the tangent line a curved path.
  • Roll 20a is the fulcrum roll which sustains the full force required to bend the casting.
  • the driven rolls 18 and 22 each sustain approximately one-half the reaction force at the convex side of the casting opposite the direction of bending. In each instance pressure within the respective cylinders 65 forces the driven roll against the face of the casting C, backed up by the unyielding idler 20 at the convex side of the casting and idlers 18a and 22a at the concave side.
  • the pairs of idlers 19-190 and 21-2 la confine the casting against bulging as it travels between the pairs of rolls which actually bend the casting. These idlers float to follow the contour of the casting and thus eliminate any abnormal loading caused by misalignment of the other rolls. We control the precise position of the various idlers which rotate on fixed axes by insertion and removal of shims 35, 47, 59 and 70.
  • FIG. 5 shows a modification of our bending roll unit for use with a rigid starter bar 75.
  • the pairs of rolls l7-l7a, 18-18a, I9-I9a, 20-20a, and 2l-2la may be similar to corresponding rolls in the embodiment of our invention shown in FIG. 1, but in FIG. 5 we have illustrated the force-sustaining rolls 17-17a, l8-l8a and 20-20a as of smaller diameter equipped with back-up rolls 76.
  • the frame 10 of the modified unit includes a switch section 78 below the floating idlers 21-210 at the convex side of the casting C.
  • the shiftable driven roll 22 and the idler 23 are joumaled in the switch section.
  • the idler 23 may be similar to corresponding rolls shown in FIG. 1.
  • Several rolls 79 of the curved roll rack 14 also are journaled in the switch section 78.
  • the switch section is pivoted on a horizontal axis to the fixed portion of frame 10 and is equipped with a fluid pressure mechanism 80 for moving it between open and closed positions.
  • the driven roll 22 shifts through only a small are as the section opens and closes, and is equipped with a suitable flexible coupling (not shown) whereby its drive does not interfere with shifting.
  • the driven rolls of the bending roll unit not only serve to bend the casting but also to apply the initial tractive force for propelling the casting.
  • the starter bar 24 or may not be as thick as the casting C.
  • the shiftable mounting of the driven rolls 18, 20a and 22a enables their respective cylinders 65 to force the roll into engagementwith the starter bar, where they act initially as a brake to support the bar.
  • the casting is closely confined and all tractive forces are distributed in a way to damage the casting.
  • a bending roll unit for a continuous-casting machine comprising a frame, a plurality of opposed pairs of rolls, means journaling said rolls in said frame, said rolls including:
  • a driven fulcrum roll and an opposed idler said fulcrum roll being shiftable and defining a tangent line where a casting first acquires a curvature, said idler being joumaled on a fixed axis;
  • reaction roll being shiftable and said secondnamed idler being joumaled on a fixed axis
  • a bending roll unit as defined in claim 1 comprising in addition an opposed pair of floating idlers intermediate said first and second-named pairs of rolls and an opposed pair of floating idlers intermediate said first and third-named pairs of rolls.
  • a unit as defined in claim 2 in which said frame includes a switch section below said last-named floating idlers, said second-named driven reaction roll and one of said last-named idlers being journaled in said switch section for use with a rigid starter bar.
  • a bending roll unit as defined in claim 1 comprising in addition yieldable means carried by said frame urging said shiftable driven rolls toward their respective opposed idlers.
  • a continuous-casting machine which includes a straight guide roll rack, a starter bar, a bending-roll unit directly following said rack therebelow, and a curved roll rack below said bending roll unit, the improvement in which said bending roll unit comprises a driven fulcrum roll defining a tangent line above which a casting is straight and below which a casting has a curvature,
  • driven reaction rolls above and below said fulcrum roll at the convex side of the casting, and idlers opposed to said fulcrum and reaction rolls for engaging the opposite face of the casting, said driven rolls serving not only to bend the casting but also applying the initial tractive force for propelling the casting.
  • a bending roll unit as defined in claim 6 in which said fulcrum and reaction rolls are shiftable and said idlers are journaled on fixed axes.
  • a bending roll unit as defined in claim 6 including in addition an opposed pair of floating idlers immediately above said fulcrum roll and its opposed idler, and a second opposed pair of floating idlers immediately below said fulcrum roll and its opposed idler.
  • a bending roll unit as defined in claim 6 including in addition opposed pairs of idlers journaled on fixed axes above and below said reaction rolls and their opposed idlers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US00208776A 1971-12-16 1971-12-16 Bending-roll unit for continuous-casting machine Expired - Lifetime US3753461A (en)

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US20877671A 1971-12-16 1971-12-16

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US (1) US3753461A (fr)
JP (1) JPS4866530A (fr)
AR (1) AR194405A1 (fr)
AT (1) AT322129B (fr)
AU (1) AU473054B2 (fr)
BE (1) BE792377A (fr)
BR (1) BR7208713D0 (fr)
CA (1) CA973326A (fr)
DE (1) DE2256905A1 (fr)
ES (1) ES409009A1 (fr)
FR (1) FR2163508B1 (fr)
GB (1) GB1414309A (fr)
IT (1) IT976074B (fr)
NL (1) NL7217120A (fr)
RO (1) RO61328A (fr)
SU (1) SU541421A3 (fr)
ZA (1) ZA727995B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322683A1 (fr) * 1975-09-03 1977-04-01 Voest Ag Charpente de guidage a rouleaux pour installations de coulee en continu
US4090549A (en) * 1974-07-12 1978-05-23 United States Steel Corporation Method and mechanism for determining forces on a solidifying casting
US4227636A (en) * 1975-10-04 1980-10-14 Demag A.G. Supporting roller stand for steel slab strand casting plants, particularly for curved slab strand casting plants
EP0027105A1 (fr) * 1979-10-01 1981-04-15 VOEST-ALPINE Aktiengesellschaft Installation de coulée continue courbe
US4300619A (en) * 1978-09-19 1981-11-17 Voest-Alpine Aktiengesellschaft Strand guide arrangement to be used in a continuous casting plant
US4799535A (en) * 1987-04-09 1989-01-24 Herbert Lemper Modular continuous slab casters and the like
CN106001212A (zh) * 2016-06-03 2016-10-12 山东冬瑞高新技术开发有限公司 一种建筑用大尺寸钢梁连续弯曲系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5410925B2 (fr) * 1973-12-31 1979-05-10
CN110005189B (zh) * 2019-04-18 2023-08-01 安阳融达实业有限公司 一种建筑平面模板及其制备装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB900734A (en) * 1959-09-01 1962-07-11 Concast Ag Improvements in arrangements for feeding in the starting bar in vertical continuous casting plants
US3290741A (en) * 1960-11-18 1966-12-13 Olsson Erik Allan Methods of bending casting in a continuous casting process
US3314115A (en) * 1964-01-17 1967-04-18 Concast Ag Continuous casting machine
GB1075322A (en) * 1964-04-03 1967-07-12 Enzo Colombo Improvements in or relating to the continuous casting of metal
US3447591A (en) * 1964-03-06 1969-06-03 United States Steel Corp Apparatus for bending a casting having a liquid core
US3483915A (en) * 1963-06-25 1969-12-16 Moossche Eisenwerke Ag Method of forming continuously-cast metal strand into integral billets
GB1208194A (en) * 1968-11-29 1970-10-07 Vnii Pk I Metall Maschino Device for withdrawing and straightening ingots in a plant for continuous metal casting in which the ingot initially follows a curved path
US3543830A (en) * 1967-01-18 1970-12-01 Demag Ag Method and apparatus for straightening arc-type continuous casting
US3557865A (en) * 1968-03-18 1971-01-26 United States Steel Corp Mechanism for measuring loads on pinch rolls of continuous-casting machine
US3590908A (en) * 1969-06-30 1971-07-06 Koppers Co Inc Apparatus for bending continuous cast slabs
US3645323A (en) * 1969-01-21 1972-02-29 Mannesmann Ag Roll system for continuous casting machines

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB900734A (en) * 1959-09-01 1962-07-11 Concast Ag Improvements in arrangements for feeding in the starting bar in vertical continuous casting plants
US3290741A (en) * 1960-11-18 1966-12-13 Olsson Erik Allan Methods of bending casting in a continuous casting process
US3483915A (en) * 1963-06-25 1969-12-16 Moossche Eisenwerke Ag Method of forming continuously-cast metal strand into integral billets
US3314115A (en) * 1964-01-17 1967-04-18 Concast Ag Continuous casting machine
US3447591A (en) * 1964-03-06 1969-06-03 United States Steel Corp Apparatus for bending a casting having a liquid core
GB1075322A (en) * 1964-04-03 1967-07-12 Enzo Colombo Improvements in or relating to the continuous casting of metal
US3543830A (en) * 1967-01-18 1970-12-01 Demag Ag Method and apparatus for straightening arc-type continuous casting
US3557865A (en) * 1968-03-18 1971-01-26 United States Steel Corp Mechanism for measuring loads on pinch rolls of continuous-casting machine
GB1208194A (en) * 1968-11-29 1970-10-07 Vnii Pk I Metall Maschino Device for withdrawing and straightening ingots in a plant for continuous metal casting in which the ingot initially follows a curved path
US3645323A (en) * 1969-01-21 1972-02-29 Mannesmann Ag Roll system for continuous casting machines
US3590908A (en) * 1969-06-30 1971-07-06 Koppers Co Inc Apparatus for bending continuous cast slabs

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090549A (en) * 1974-07-12 1978-05-23 United States Steel Corporation Method and mechanism for determining forces on a solidifying casting
FR2322683A1 (fr) * 1975-09-03 1977-04-01 Voest Ag Charpente de guidage a rouleaux pour installations de coulee en continu
US4034796A (en) * 1975-09-03 1977-07-12 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Continuous casting plant roller stand
US4227636A (en) * 1975-10-04 1980-10-14 Demag A.G. Supporting roller stand for steel slab strand casting plants, particularly for curved slab strand casting plants
US4300619A (en) * 1978-09-19 1981-11-17 Voest-Alpine Aktiengesellschaft Strand guide arrangement to be used in a continuous casting plant
EP0027105A1 (fr) * 1979-10-01 1981-04-15 VOEST-ALPINE Aktiengesellschaft Installation de coulée continue courbe
US4480680A (en) * 1979-10-01 1984-11-06 Voest-Alpine Aktiengesellschaft Bow-type continuous casting plant for strands
US4799535A (en) * 1987-04-09 1989-01-24 Herbert Lemper Modular continuous slab casters and the like
CN106001212A (zh) * 2016-06-03 2016-10-12 山东冬瑞高新技术开发有限公司 一种建筑用大尺寸钢梁连续弯曲系统
CN106001212B (zh) * 2016-06-03 2017-12-29 山东鑫通钢结构工程有限公司 一种建筑用大尺寸钢梁连续弯曲系统

Also Published As

Publication number Publication date
SU541421A3 (ru) 1976-12-30
IT976074B (it) 1974-08-20
FR2163508B1 (fr) 1978-02-10
AU473054B2 (en) 1976-06-10
AU4892572A (en) 1974-05-16
BR7208713D0 (pt) 1973-09-18
JPS4866530A (fr) 1973-09-12
RO61328A (fr) 1977-01-15
ZA727995B (en) 1973-07-25
BE792377A (fr) 1973-06-06
FR2163508A1 (fr) 1973-07-27
ES409009A1 (es) 1975-10-16
GB1414309A (en) 1975-11-19
CA973326A (en) 1975-08-26
AR194405A1 (es) 1973-07-13
NL7217120A (fr) 1973-06-19
AT322129B (de) 1975-05-12
DE2256905A1 (de) 1973-07-19

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AS Assignment

Owner name: USX CORPORATION, A CORP. OF DE, STATELESS

Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960

Effective date: 19880112