US3722576A - Method and apparatus for straightening continuous casting - Google Patents
Method and apparatus for straightening continuous casting Download PDFInfo
- Publication number
- US3722576A US3722576A US00171834A US3722576DA US3722576A US 3722576 A US3722576 A US 3722576A US 00171834 A US00171834 A US 00171834A US 3722576D A US3722576D A US 3722576DA US 3722576 A US3722576 A US 3722576A
- Authority
- US
- United States
- Prior art keywords
- rolls
- casting
- roll
- series
- named
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009749 continuous casting Methods 0.000 title claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 90
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 4
- 238000009751 slip forming Methods 0.000 description 3
- 235000000396 iron Nutrition 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000127464 Paubrasilia echinata Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- 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
- B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening strands
Definitions
- ABSTRACT A method and apparatus for straightening castings formed in a continuous-casting operation. After a partially solidified casting emerges from a continuouscasting mold, it travels through bending rolls and a curved roll rack which change its direction of travel from vertical to horizontal, but the casting acquires a curved set and must thereafter be straightened.
- the straightening apparatus of the present invention includes lower and upper series of rolls closely confining a casting, yet avoiding excessive forces such as would damage the casting, which may still have a liquid core.
- the apparatus has a critical combination of driven and idler rolls of varying diameters, which afford the necessary mechanical strength at reaction points, yet maintain minimum spacing between rolls in each series and allow standardization of the drives for the driven rolls.
- 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 series of guide rolls, usually idlers, where water is sprayed on its surface to effect further solidification.
- the casting passes through power driven pinch and bending rolls, and thence through a curved roll rack which changes its direction of travel from vertical to horizontal. The casting acquires a curved set as it is bent and must be straightened before it is cut to individual lengths.
- the casting commences to bend after traveling vertically only a very short distance from the mold, and it may still have a liquid core as it leaves the curved roll rack.
- the core is liquid
- the casting must be handled with great care to prevent damaging its skin and producing an unsatisfactory surface or even a break-out of liquid metal.
- the casting must be closely confined without excessive force applied at any one location. Similar problems of course are encountered in operating curved-mold casting machines which form a casting with an initial curvature.
- An object of the present invention is to provide an improved method and apparatus for straightening curved continuously formed castings in which the casting is closely confined both ahead of and beyond the point of tangency dividing its straight portion from its curved portion, and in which forces applied to the casting in a direction normal to its surface are distributed uniformly along the length of the casting.
- a further object is to provide an improved straightening method and apparatus in which tensile forces on a continuously formed casting are minimal.
- a further object is to provide an improved straightening method and apparatus which can handle continuously formed castings while the core remains liquid without damaging the casting.
- a further object is to provide a straightening apparatus which embodies a combination of rolls of varying diameters to afford mechanical strength at reaction points, yet maintain close spacing of the rolls along the casting.
- a further object is to provide a straightening apparatus which is readily assembled or dismantled for maintenance.
- FIG. 1 is a partly diagrammatic longitudinal sectional view of a continuous-casting machine equipped with a straightening apparatus constructed in accordance with my invention
- FIG. 2 is an approximately vertical section on line IIII of FIG. 1;
- FIG. 3 is a vertical section on line IlIIII of FIG. 1;
- FIG. 4 is a top plan view of the structure shown in FIG. 3.
- FIG. 1 shows diagrammatically a conventional openended water-cooled mold l0 and the last set of rolls 12 of a curved roll rack of a continuous-casting machine.
- a partially solidified casting C is formed in the mold and emerges continuously from the lower end thereof. Subsequently the casting travels through the curved roll rack, which changes its direction of travel from vertical to horizontal.
- the casting has a curved set as it leaves the curved roll rack, and next it travels through my straightening apparatus 13.
- the casting machine of course includes the usual other parts, such as a drive for vertically oscillating the mold, a guide-roll rack and spray chamber beneath the mold, a pinch roll assembly, bending rolls, a starter bar, etc., which I have not shown since they are not involved in the present invention.
- My straightening apparatus 13 includes a lower series of closely adjacent work rolls 15, 16, I7, l8, I9, 20, 21, 22, 23 and 24, and a cooperating upper series 150, 160, 17a, I80, 190, 200, 210, 220, 230, and 240.
- the two series of work rolls are spaced apart vertically and define a pass for confining the casting C. All ten rolls of the lower series are journaled on fixed axes. Some rolls of the upper series are journaled on fixed axes and some on vertically movable axes, as hereinafter explained. Some rolls are idlers and some driven, as also hereinafter explained.
- the pairs of rolls 15-150, 16-160, and 17-170 lie ahead of the point of tangency, that is, where the casting C still is curved.
- the three lower rolls l5, l6 and 17 are idlers.
- the two upper rolls and 170 are driven and are vertically movable.
- the upper roll is an idler and is journaled on a fixed axis.
- the pair of rolls 18-180 define the point of tangency, that is, where the casting C first becomes straight.
- Roll 18 may be either an idler or driven and has an idler back-up roll 25 therebelow, as hereinafter explained.
- the pairs of rolls 19-190, 20-200, 21-210, 22-220, 23-230, and 24-240 lie beyond the point of tangency, that is, where the casting C already is straight.
- the six lower rolls 19, 20, 21, 22, 23 and 24 are idlers.
- the three upper rolls 190, 210, and 230 are driven and are vertically movable.
- the three upper rolls 200, 220, and 240 are idlers and are journaled on fixed axes.
- reaction roll 18 sustains the full downward thrust of the force required to straighten the casting. While roll 18 may be of relatively small diameter, it has a largediameter back-up roll 25 to afford the necessary mechanical strength. Each of the other two reaction rolls 16a and 200 sustains one-half the upward thrust of the force required to straighten the casting. Lacking back-up rolls, these rolls must be of sufficiently large diameter themselves to afford the necessary mechanical strength to sustain this force.
- the reaction rolls must of course be journaled on fixed axes.
- roll 18 may have a diameter of only 15 inches, but its back-up roll 25 may have a diameter of 24 inches.
- Rolls 160, 200, and 220 may have diameters of 19 inches.
- All the driven rolls a, 17a, 19a, 21a and 23a desirably are of equal diameter, whereby they can have standardized drive means with interchangeable parts, yet rotate at equal peripheral speeds.
- the various rolls of both the upper and lower series should be as near one another as space permits to confine the casting C effectively and minimize the tendency of the casing to bulge.
- Each of the upper driven rolls has a large diameter roll 16a, a or 22a next to it on one or both sides, and hence must be of relatively small diameter not to interfere.
- Each of the remaining idlers 15, 16, 17, 8a, 19, 20, 21, 22, 23, 24 and 24a may be of equal diameter, a little larger than the driven rolls.
- each driven roll may have a diameter of 15 inches, and each of the last-mentioned idlers a diameter of 16 inches.
- the diameter of the upper driven rolls determines the diameter of the reaction roll 18 if this roll is driven.
- FIG. 2 shows my preferred construction of the pair of 20 work rolls 18-18a (lower roll 18 driven, upper roll 18a idler).
- the lower roll is a reaction roll and has the backup roll 25 therebelow, as already described.
- Opposite ends of the back-up roll are journaled in free and held bearings housed in chocks 28 and 28a, which rest on load cells 29, supported on base members 30.
- Transverse angle irons 31 are welded to the chocks 28 and 28a and extend therebetween to brace the structure.
- Opposite ends of the lower work roll 18 are journaled in free and held bearings housed in chocks 32 and 32a immediately above chocks 28 and 28a.
- a drive shaft 33 for roll 18 is shown extending from the left end to a suitable drive means(not shown), although optionally roll 18 may be an idler.
- Opposed fixed side frames 34 extend upwardly from the base members 30.
- Opposite ends of the upper work roll 18a are journaled in free and held bearings housed in chocks 35 and 35a, which are welded to a transverse beam 36 supported at the top of frames 34 and spanning the space therebetween.
- the end faces of the six chocks have keys 37 which are slidably received in keyways 38 formed in the inside faces of the side frames 34.
- Chocks 35 and 35a are held in place with tapered keepers 39 removably received in openings in the side frames 34.
- Each chock 35 and 35a rests on a series of shims 40, which I can take out or add to for the purpose of making minor adjustments in the vertical position of roll 18a.
- I pivot latch bars 41 to the upper edges of the side frames to hold the shims in place.
- FIGS. 3 and 4 show my preferred construction of the pair of rolls 21-21a (lower roll 21 idler, upper roll 21a driven).
- the pairs of rolls l5-15a, 17-170, 19-19a and 2323a are similar, and I have not repeated the showing.
- Opposite ends of the lower roll 21 are journaled in free and held bearings housed in chocks 45 and 45a which rest on ledges 46 formed on opposite fixed side frames 47.
- Frames 47 have hand holes 49 to furnish access to the nuts on studs 48.
- Transverse angle irons 50 are welded to the chocks 45 and 45a and extend therebetween to brace the structure.
- Opposite ends of the upper roll 21a are journaled in free and held bearings housed in chocks 52 and 52a which I weld to the underside of a transverse vertically movable yoke 53.
- the end faces of the four chocks have keys 54 which are slidably received in keyways 55 formed in the inside faces of frames 47.
- the upper edges of frames 47 have notches 56 which receive the yoke 53 and portions of the chocks 52 and 52a.
- a drive shaft 57 for rolls 21a also extends through the notch 56 at the left to a suitable drive means (not shown).
- Yoke 53 is formed of spaced apart plates 58 of inverted U-shape connected by separators 59 welded thereto (FIG. 4).
- the yoke spans the space across the top of the two side frames 47, and has depending legs 60 outside the frames.
- Double-acting fluid pressure cylinders 61 are anchored at their lower ends to the outside of the respective frames 47 and have vertically movable pistons and piston rods 62. I attach the upper ends of the piston rods to the legs 60 of the yoke with removable pins 63.
- the cylinders and yoke control the positioning of the upper roll 21a, the chocks 52 and 52a of which can move up and down the keyways 55.
- both the lower and upper rolls are idlers, as occurs with the pairs 16-16a, 20-2011, and 22-22a.
- the parts which support the lower idlers 16, 20 and 22 preferably are of similar construction to the parts which support roll 21 shown in FIG. 3.
- the parts which support the upper idlers 16a, 20a, and 22a preferably are of similar construction to the parts which support roll 18a shown in FIG. 2.
- I can readily dismantle the apparatus for maintenance. After removing the tapered keepers 39, I can use a crane to lift out beam 36, chocks 35 and 35a, and roll 18a as a unit. Thereafter I can lift out successively roll 18 and its chocks 32 and 32a, and roll 25 and its chocks 28 and 28a. After removing the pins 63, I can use the crane to lift out roll 21a and its chocks 52 and 52a as a unit. Thereafter I can remove the nuts on studs 48 and lift out roll 21 and its chocks 45 and 45a. I follow similar procedures to lift out any of the other rolls.
- my invention affords a simple method and apparatus for straightening a continuous casting, which may have a liquid core even after the straightening operation.
- I select rolls of diameters to furnish the necessary mechanical strength at the points of maximum thrust yet afford standardization of the driven rolls and their drives, as well as close confinement of the casting.
- the lower and upper idlers define a pass of uniform thickness for the casting, while the upper driven rolls, which propel the casting through the apparatus, can yield in order to avoid damage to the casting and minimize tensile forces thereon.
- the load cells 29 are connected in a circuit (not shown) which affords a continuous measurement of the force on the reaction roll 18, and thus give an immediate indication whenever this force becomes out of line.
- a straightening apparatus comprising:
- one roll of said lower series being adapted to contact the bottom face of the casting at the point of tangency dividing the straight portion of the casting from its curved portion and to sustain the downward thrust of the force required to straighten the casting;
- said last-named other rolls includinghdriven upper rolls and idler lower rolls of which e lower rolls are journaled on fixed axes;
- a straightening apparatus as defined in claim 5 in which the two rolls which sustain half the upward thrust are of relatively large diameter, and the rolls next to them are driven and of relatively small diameter.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Metal Rolling (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17183471A | 1971-08-16 | 1971-08-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3722576A true US3722576A (en) | 1973-03-27 |
Family
ID=22625321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00171834A Expired - Lifetime US3722576A (en) | 1971-08-16 | 1971-08-16 | Method and apparatus for straightening continuous casting |
Country Status (16)
Country | Link |
---|---|
US (1) | US3722576A (fr) |
JP (1) | JPS4829628A (fr) |
AT (1) | AT326850B (fr) |
AU (1) | AU470229B2 (fr) |
BE (1) | BE787511A (fr) |
BR (1) | BR7205540D0 (fr) |
CA (1) | CA970521A (fr) |
DE (1) | DE2239966A1 (fr) |
ES (1) | ES405882A1 (fr) |
FR (1) | FR2149474B1 (fr) |
GB (1) | GB1407073A (fr) |
IT (1) | IT965110B (fr) |
NL (1) | NL7211201A (fr) |
PL (1) | PL84899B1 (fr) |
RO (1) | RO59797A (fr) |
ZA (1) | ZA725448B (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3963069A (en) * | 1974-08-16 | 1976-06-15 | Concast Ag | Roller apron framework for support- or drive rolls of a continuous casting installation |
US4034797A (en) * | 1976-01-09 | 1977-07-12 | United States Steel Corporation | Remote-controlled infinitely adjustable roll stand |
US4071074A (en) * | 1974-06-11 | 1978-01-31 | Schloemann-Siemag Aktiengesellschaft | Roller apron for a continuous casting installation |
US4106547A (en) * | 1976-04-27 | 1978-08-15 | Concast Ag | Method and arrangement for removing a cooled strand from a continuous casting installation |
US4122888A (en) * | 1975-04-30 | 1978-10-31 | Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft | Method of guiding a cast strand and arrangement for carrying out the method |
EP0064227A1 (fr) * | 1981-05-02 | 1982-11-10 | MANNESMANN Aktiengesellschaft | Dispositif de guidage à rouleaux, notamment pour une machine à convoyer et à redresser d'une installation de coulée continue |
EP0074247A1 (fr) * | 1981-09-04 | 1983-03-16 | Nippon Steel Corporation | Machine à coulée continue du type courbe permettant le dressage à points multiples et ayant une faible hauteur |
WO2001091942A1 (fr) * | 2000-06-02 | 2001-12-06 | Voest-Alpine Industrieanlagenbau Gmbh & Co | Guidage de brin d'une installation de coulee continue |
CN106513610A (zh) * | 2016-11-18 | 2017-03-22 | 上海耀秦冶金设备技术有限公司 | 密排辊集中驱动的拉矫装置及使用该装置的连铸机 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5523771B2 (fr) * | 1973-11-27 | 1980-06-25 | ||
FR2358224A1 (fr) * | 1976-07-16 | 1978-02-10 | Clesid Sa | Dispositif d'extraction de la brame d'une machine de coulee continue |
DE3034444A1 (de) * | 1980-09-12 | 1982-04-22 | Schloemann-Siemag AG, 4000 Düsseldorf | Richttreiber in einer stahlstranggiessanlage |
DE60118404T2 (de) | 2000-09-28 | 2006-11-16 | Kansai Chemical Engineering Co., Ltd., Amagasaki | Wärmeübertragungsvorrichtung |
AT506824B1 (de) | 2008-05-26 | 2013-01-15 | Siemens Vai Metals Tech Gmbh | Mehrstrang-stranggiessanlage |
CA2733536C (fr) | 2008-09-18 | 2015-12-22 | Toyo Engineering Corporation | Appareil pour la production de resine polymere, reacteur de polymerisation et methode pour la production de cette resine |
EP3053647A1 (fr) * | 2015-02-06 | 2016-08-10 | LANXESS International SA | Réacteur tubulaire et procédé de polymérisation multiphases |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3157920A (en) * | 1962-04-03 | 1964-11-24 | Concast Ag | Continuous casting plant with deflection of the casting |
US3543830A (en) * | 1967-01-18 | 1970-12-01 | Demag Ag | Method and apparatus for straightening arc-type continuous casting |
-
0
- BE BE787511D patent/BE787511A/fr unknown
-
1971
- 1971-08-16 US US00171834A patent/US3722576A/en not_active Expired - Lifetime
-
1972
- 1972-08-08 ZA ZA725448A patent/ZA725448B/xx unknown
- 1972-08-09 AU AU45414/72A patent/AU470229B2/en not_active Expired
- 1972-08-14 CA CA149,379A patent/CA970521A/en not_active Expired
- 1972-08-14 PL PL1972157260A patent/PL84899B1/pl unknown
- 1972-08-14 DE DE2239966A patent/DE2239966A1/de active Pending
- 1972-08-15 BR BR5540/72A patent/BR7205540D0/pt unknown
- 1972-08-16 JP JP47082048A patent/JPS4829628A/ja active Pending
- 1972-08-16 AT AT706672A patent/AT326850B/de not_active IP Right Cessation
- 1972-08-16 IT IT69651/72A patent/IT965110B/it active
- 1972-08-16 NL NL7211201A patent/NL7211201A/xx not_active Application Discontinuation
- 1972-08-16 GB GB3827672A patent/GB1407073A/en not_active Expired
- 1972-08-16 ES ES405882A patent/ES405882A1/es not_active Expired
- 1972-08-16 FR FR7229285A patent/FR2149474B1/fr not_active Expired
- 1972-08-16 RO RO71970A patent/RO59797A/ro unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3157920A (en) * | 1962-04-03 | 1964-11-24 | Concast Ag | Continuous casting plant with deflection of the casting |
US3543830A (en) * | 1967-01-18 | 1970-12-01 | Demag Ag | Method and apparatus for straightening arc-type continuous casting |
Non-Patent Citations (1)
Title |
---|
Journal of Metals, March 1968, TNIJS.P16. * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4071074A (en) * | 1974-06-11 | 1978-01-31 | Schloemann-Siemag Aktiengesellschaft | Roller apron for a continuous casting installation |
US3963069A (en) * | 1974-08-16 | 1976-06-15 | Concast Ag | Roller apron framework for support- or drive rolls of a continuous casting installation |
US4122888A (en) * | 1975-04-30 | 1978-10-31 | Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft | Method of guiding a cast strand and arrangement for carrying out the method |
US4034797A (en) * | 1976-01-09 | 1977-07-12 | United States Steel Corporation | Remote-controlled infinitely adjustable roll stand |
US4106547A (en) * | 1976-04-27 | 1978-08-15 | Concast Ag | Method and arrangement for removing a cooled strand from a continuous casting installation |
EP0064227A1 (fr) * | 1981-05-02 | 1982-11-10 | MANNESMANN Aktiengesellschaft | Dispositif de guidage à rouleaux, notamment pour une machine à convoyer et à redresser d'une installation de coulée continue |
EP0074247A1 (fr) * | 1981-09-04 | 1983-03-16 | Nippon Steel Corporation | Machine à coulée continue du type courbe permettant le dressage à points multiples et ayant une faible hauteur |
WO2001091942A1 (fr) * | 2000-06-02 | 2001-12-06 | Voest-Alpine Industrieanlagenbau Gmbh & Co | Guidage de brin d'une installation de coulee continue |
CN106513610A (zh) * | 2016-11-18 | 2017-03-22 | 上海耀秦冶金设备技术有限公司 | 密排辊集中驱动的拉矫装置及使用该装置的连铸机 |
Also Published As
Publication number | Publication date |
---|---|
FR2149474A1 (fr) | 1973-03-30 |
JPS4829628A (fr) | 1973-04-19 |
BE787511A (fr) | 1973-02-12 |
GB1407073A (en) | 1975-09-24 |
CA970521A (en) | 1975-07-08 |
IT965110B (it) | 1974-01-31 |
AU4541472A (en) | 1974-02-14 |
FR2149474B1 (fr) | 1978-02-10 |
ES405882A1 (es) | 1975-07-16 |
DE2239966A1 (de) | 1973-02-22 |
ZA725448B (en) | 1973-04-25 |
PL84899B1 (fr) | 1976-04-30 |
AT326850B (de) | 1975-12-29 |
BR7205540D0 (pt) | 1973-06-07 |
RO59797A (fr) | 1976-05-15 |
NL7211201A (fr) | 1973-02-20 |
ATA706672A (de) | 1975-03-15 |
AU470229B2 (en) | 1976-03-11 |
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