US3756304A - Method and apparatus for guiding continuously cast strip - Google Patents

Method and apparatus for guiding continuously cast strip Download PDF

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Publication number
US3756304A
US3756304A US00243276A US3756304DA US3756304A US 3756304 A US3756304 A US 3756304A US 00243276 A US00243276 A US 00243276A US 3756304D A US3756304D A US 3756304DA US 3756304 A US3756304 A US 3756304A
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United States
Prior art keywords
ring
strip
curvature
roll
pair
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Expired - Lifetime
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US00243276A
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English (en)
Inventor
C Gerding
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Jones and Laughlin Steel Inc
Ltv Steel Co Inc
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Jones and Laughlin Steel Corp
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Assigned to JONES & LAUGHLIN STEEL, INCORPORATED reassignment JONES & LAUGHLIN STEEL, INCORPORATED MERGER (SEE DOCUMENT FOR DETAILS). , DELAWARE, EFFECTIVE JUNE 22, 1981. Assignors: JONES & LAUGHLIN STEEL CORPORATION, A CORP. OF PA., NEW J&L STEEL CORPRATION, A CORP. OF DE., (CHANGED TO), YOUNGTOWN SHEET & TUBE COMPANY, A CORP. OF OH. (MERGED INTO)
Assigned to LTV STEEL COMPANY, INC., reassignment LTV STEEL COMPANY, INC., MERGER AND CHANGE OF NAME EFFECTIVE DECEMBER 19, 1984, (NEW JERSEY) Assignors: JONES & LAUGHLIN STEEL, INCORPORATED, A DE. CORP. (INTO), REPUBLIC STEEL CORPORATION, A NJ CORP. (CHANGEDTO)
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
    • B22D11/062—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires the metal being cast on the inside surface of the casting wheel

Definitions

  • This invention relates to a method and apparatus for guiding metal strip continuously cast on the inside surface of a rotating ring. It is more particularly concerned with an apparatus for guiding such strip out of the ring with minimum deformation of the cast strip.
  • the principal problem in leading out strip through an end of the ring is to do so without excessive localized distortion of the cast metal.
  • the strip is, of course, hot and can be bent to some extent without damage, its cast structure, particularly just as it separates from the ring, can tolerate deformation only at a very limited rate.
  • FIG. 1 is a perspective view of my apparatus, a portion of which is broken away, illustrating its essential features. 7
  • FIG. 2 is an end elevation of a guide unit of my apparatus comprising a guide roll pair and its mounting.
  • FIG. 3 is an elevation in cross-section of the apparatus of FIG. 2 taken on the plane 3-3 thereof.
  • the strip 10 is solidified between the inner surface 11 of a casting ring 12 and the outer surface 13 of a roll 14 which is positioned within ring 12 near its lowermost point.
  • Ring 12 is caused to rotate in a clockwise direction as seen in FIG. 1 by means not shown, and its outside surface is cooled by means such as water sprays, also not shown, so as to extract heat from its inside surface 11.
  • a cooling medium is circulated through roll 14 so as to extract heat from its outside surface 13.
  • Molten metal is supplied to the bottom portion of the ring 12 through flanges launder 15.
  • Ring 12 is formed with inwardly directed inclined flanges 16 on each side so that a pool of metal is contained therebetween in its lowermost portion.
  • Roll 14 is formed with beveled ends 17 which mate with fanges 16 so that the solidified strip 10 is of channel-shaped cross-section.
  • the strip 10 solidified between ring 12 and roll 13 has approximately the same curvature as inside surface 11 of ring 12, which, of course, is cylindrical. In order to get it out through the open end of ring 12, its curvature must be increased and it must be caused to move axially of ring 12. These changes in its path are brought about by passing it through successively positioned guide means or units to be described. These units are shown in perspective in FIG. 1 and in more detail in FIGS. 2 and 3.
  • the first guide unit 18 encountered by strip 10 as it is separated from ring 12 comprises an elongated mounting 27 from one face of which project parallel spindles 21 and 22 at its opposite ends.
  • Spindle 21 carries a freely rotatable roll 23 formed with outwardly projecting inclined flanges 24 at each end in the same manner and shape as inside surface 11 of ring 12.
  • Spindle 22 carries a freely rotatable roll 25 having beveled ends 26 in the same manner and shape as the outside surface 13 of roll 14. From the opposite face of mounting 27 projects a shaft 28 joumaled in a plate 29 and passing through that plate.
  • Shaft 28 is positioned with its axis intermediate the axes of spindles 21 and 22, but nearer the axis of spindle 21 than that of spindle 22.
  • the projecting end of shaft 28 carries a radially extending crank arm 30.
  • bracket 31 Attached to plate 29 on the same side thereof as crank arm 30 is bracket 31 in which is joumaled a trunnion ring 32 which holds a double- 'ended air cylinder 33 at one end thereof.
  • the piston rod 34 of air cylinder 33 is attached to crank arm 30 by pivot pin 35.
  • Compressed air from a source not shown is introduced into the trunnion end of air cylinder 33 through air line 37 and compressed air from the same'source is introduced into the opposite end of air cylinder 33 through air line 38.
  • Those air lines are connected to a four-way valve, not shown, by means of which the air can be supplied to either end of the air cylinder as desired.
  • Guide unit 18 is positioned inside ring 12 with roll 23 between the inside surface 11 of ring 12 and the path of separated cast strip 10. Roll 25 is on the opposite side of cast strip 10.
  • the guide unit 18 is positioned so as to bend the cast strip inwardly and increase its curvature. Unit 18 is also positioned so that the increase in curvature of strip 10 on its side adjacent the exit end of ring 12 is somewhat less than the increase in curvature of the strip on its other side.
  • the second and third guide units 19 and 20 respectively are of the same construction as guide unit 18.
  • the three units 18, 19 and 20, each of which is at least partially inside ring 12, are positioned so that the portions of the successive units which are inside the ring are successively smaller.
  • Element 40 is the first element of the cone of evolution encountered by the strip. It lies near to the inside surface 11 of ring 12 and lies on the surface of strip 10 shortly after its separation from ring 12 but is not at right angles to the edges of strip 10 by a few degrees.
  • the guide units l8, l9 and 20 previously mentioned are all positioned at least partially within the upper half of ring 12.
  • the curvature imparted to the strip by those units causes it to continue to travel through a further angular distance bringing it around into an approximately horizontal plane at or near the lowermost portion of ring 12.
  • Pinch rolls 43 and 44 disposed above and below the strip path are positioned near the lowermost portion of ring 12 so as to equalize gradually the curvatures of the two edges of the strip and change the path of travel of strip 10 gradually from a spiral on an imaginary cone to a circle. At the same time they decrease those equalized curvatures to zero, if desired, so as to produce strip the central portion of which is flat.
  • Those pinch rolls are driven by means not shown.
  • the guide units 18, 19 and 20 are mounted on a framework, not shown, which projects into the open end of ring 12 opposite the end from which the strip 10 is lead out.
  • the individual units 18, 19 and 20 are attached to this framework by affixing their respective mounting plates 29 to the framework at the angles required to guide the strip as has been described above.
  • the framework or the mounting plates are provided with conventional adjusting means, such as adjusting screws, not shown.
  • each unit l8, l9 and 20 are set so that the plane common to their parallel axes is more or less at right angles to the strip path. This provides a gap between rolls 23 and 25 to maximum width.
  • the rolls are set in this position by admitting air to air cylinder 33 through air line 37.
  • a dummy or starter strip approximately equal in width to strip 10 to be cast but somewhat thinner is placed with one end in ring 12 at its lowermost portion and is trained under roll 14 and through units 18, 19 and 20 and pinch rolls 43 and 44. Molten metal is then led into the lowermost portion of ring 12 through launder and ring 12 is caused to rotate. Pinch rolls 43 and 44 are likewise started up.
  • the first molten metal solidified between ring 12 and roll 14 freezes to the end of the dummy strip and is lead around through the guide units thereby.
  • air is admitted to air line 38 and allowed to exhaust through air line 37 so causing piston rod 34 to move to the right in FIG. 2 and rotate rolls 23 and 25 into their position of minimum gap as shown in FIG. 1.
  • the centerline of shaft 28 is spaced from roll 23 a distance of a little more than the thickness of cast strip 10, so that rotating shaft 28 to open or close the gap between rolls 23 and 25 does not greatly alter the upper limit of the strip path.
  • the apex angle of the imaginary cone is small and desirably is as small as possible. Its minimum value is dependent on the relation between the width of the cast strip and the inside diameter of the ring through which it must be led out. I have constructed successful apparatus with values of this angle between about 6 and about 15.
  • the path of the strip as it leaves pinch rolls 43 and 44 is not parallel to the vertical plane of the end of ring 12 but is inclined thereto at an angle which depends on the apex angle of the imaginary cone and the angular length of the strip path on the cone.
  • My apparatus may be modified in accordance with the requirements of the strip being cast. If a large casting ring is employed, it may be desirable to drive one or both of guide rolls 23 and 25 in some or all of the guide units. If very wide strip is to be cast, the apex angle of the cone may be somewhat larger than the values previously mentioned. It may be desirable under some conditions to use fixed auxiliary guides rather than a dummy strip to enter the cast strip into the guide units. Other modifications will occur to those skilled in the art of strip casting.
  • Apparatus for guiding metal strip continuously cast on the inside surface of a rotating ring out of the ring through an open end thereof comprising guide means positioned circumferentially of the ring and adjusted to increase gradually the curvature of the strip as it is separated from the ring, the curvature of the inside edge being increased more than the curvature of the outside edge, then to decrease gradually those curvatures so that the strip is caused to travel in a spiral path disposed on the surface of an imaginary cone the axis of which passes through the ring.
  • Apparatus of claim 1 including guide means positioned and adjusted to reduce gradually and equalize those curvatures as the strip passes out of the ring.
  • Apparatus of claim 1 including guide means positioned and adjusted to reduce the curvature of the strip to zero after the strip has passed out of the ring.
  • Apparatus of claim 1 in which the apex angle of the cone is between about 6 and about 6. Apparatus of claim 1 in which an element of the imaginary cone lies on the surface of the strip approximately where it is being separated from the ring.
  • the guide means comprise a plurality of pairs of rotatable rolls, each pair being mounted with the roll axes parallel to and spaced from each other so that the strip passes between the rolls of a pair.
  • Apparatus of claim 7 including at least three pairs of rolls.
  • Apparatus of claim 7 in which at least the first pair of rolls is positioned at least partially within the rotating ring.
  • Apparatus of claim 7 in which the first and second pairs of rolls are positioned at least partially within the rotating ring, with the second pair being positioned inside the ring to a lesser extent than the first pair.
  • Apparatus of claim 7 in which one guide roll is provided with flanges and the other guide roll is provided with beveled ends.
  • Apparatus of claim 7 in which at least one pair of rolls is cantilevered from a mounting which is adjustable pivotally about an axis parallel to the roll axes and positioned therebetween.
  • Apparatus of claim 12 including remotely controllable means for rotating the mounting about its pivot.
  • Apparatus of claim 12 in which the axis of the mounting pivot is closer to one roll of the pair than it is to the other roll of the pair.
  • Apparatus of claim 14 in which the uppermost roll is closer to the axis of the mounting pivot.
  • a method for removing metal strip continuously cast on the inside surface of a rotating ring from the ring through an open end thereof which comprises separating the strip from the ring, increasing the curvature of the strip as it is separated from the ring in a manner such that the curvature of the strip edge furthest away from said open end of the ring is increased more than the curvature of the strip edge nearest said open end of the ring and gradually decreasing said curvatures so that the strip travels in a spiral path disposed on the surface of an imaginary cone having an axis which passes through the ring 17.
  • the method of claim 16 which includes gradually both reducing and equalizing said curvatures as the strip passes out of the ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US00243276A 1972-04-12 1972-04-12 Method and apparatus for guiding continuously cast strip Expired - Lifetime US3756304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24327672A 1972-04-12 1972-04-12

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US3756304A true US3756304A (en) 1973-09-04

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US00243276A Expired - Lifetime US3756304A (en) 1972-04-12 1972-04-12 Method and apparatus for guiding continuously cast strip

Country Status (7)

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US (1) US3756304A (enrdf_load_stackoverflow)
JP (1) JPS5813261B2 (enrdf_load_stackoverflow)
CA (1) CA976723A (enrdf_load_stackoverflow)
DE (1) DE2315306A1 (enrdf_load_stackoverflow)
FR (1) FR2179755B1 (enrdf_load_stackoverflow)
GB (1) GB1421185A (enrdf_load_stackoverflow)
IT (1) IT981901B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889740A (en) * 1973-01-12 1975-06-17 Voest Ag Continuous casting plant
US5137075A (en) * 1987-10-13 1992-08-11 Ltv Steel Company, Inc. Continuous casting apparatus and method
US5445212A (en) * 1992-05-08 1995-08-29 Sundwiger Eisenhutte Maschinenfabrik Gmbh & Co. Casting wheel for a strip casting machine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1549124A (en) * 1976-05-04 1979-08-01 Allied Chem Chill roll castin of continuous filament
US4184532A (en) 1976-05-04 1980-01-22 Allied Chemical Corporation Chill roll casting of continuous filament
JPS5362872A (en) * 1976-11-13 1978-06-05 Kenutsudo Mfg Ltd Domestic cooking mixer
US4301854A (en) 1977-10-05 1981-11-24 Allied Corporation Chill roll casting of continuous filament
JPS571547A (en) * 1980-06-04 1982-01-06 Hitachi Ltd Rotary ring-one side belt type continuous casting device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190922943A (en) * 1909-10-07 1910-08-18 Edward Halford Strange Improvements in Means for the Manufacture of Strips, or Sheets, of Metal.
US2383310A (en) * 1939-03-16 1945-08-21 Clarence W Hazelett Continuous casting apparatus and process
US2450428A (en) * 1944-03-23 1948-10-05 Clarence W Hazelett Strip forming apparatus
US2477030A (en) * 1947-07-24 1949-07-26 Fred H Wuetig Centrifugal strip casting machine
CA528359A (en) * 1956-07-31 B. Brennan Joseph Casting of metal
GB1177758A (en) * 1966-02-08 1970-01-14 Fed Republic Of Germany Continuous Casting of Sheet or Strip Metal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA528359A (en) * 1956-07-31 B. Brennan Joseph Casting of metal
GB190922943A (en) * 1909-10-07 1910-08-18 Edward Halford Strange Improvements in Means for the Manufacture of Strips, or Sheets, of Metal.
US2383310A (en) * 1939-03-16 1945-08-21 Clarence W Hazelett Continuous casting apparatus and process
US2450428A (en) * 1944-03-23 1948-10-05 Clarence W Hazelett Strip forming apparatus
US2477030A (en) * 1947-07-24 1949-07-26 Fred H Wuetig Centrifugal strip casting machine
GB1177758A (en) * 1966-02-08 1970-01-14 Fed Republic Of Germany Continuous Casting of Sheet or Strip Metal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889740A (en) * 1973-01-12 1975-06-17 Voest Ag Continuous casting plant
US5137075A (en) * 1987-10-13 1992-08-11 Ltv Steel Company, Inc. Continuous casting apparatus and method
US5445212A (en) * 1992-05-08 1995-08-29 Sundwiger Eisenhutte Maschinenfabrik Gmbh & Co. Casting wheel for a strip casting machine

Also Published As

Publication number Publication date
JPS5813261B2 (ja) 1983-03-12
FR2179755A1 (enrdf_load_stackoverflow) 1973-11-23
JPS4916622A (enrdf_load_stackoverflow) 1974-02-14
IT981901B (it) 1974-10-10
GB1421185A (en) 1976-01-14
DE2315306A1 (de) 1973-10-25
CA976723A (en) 1975-10-28
FR2179755B1 (enrdf_load_stackoverflow) 1976-06-11

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Date Code Title Description
AS Assignment

Owner name: JONES & LAUGHLIN STEEL, INCORPORATED

Free format text: MERGER;ASSIGNORS:JONES & LAUGHLIN STEEL CORPORATION, A CORP. OF PA.;YOUNGTOWN SHEET & TUBE COMPANY,A CORP. OF OH. (MERGED INTO);NEW J&L STEEL CORPRATION, A CORP. OF DE., (CHANGED TO);REEL/FRAME:004510/0801

Effective date: 19851018

AS Assignment

Owner name: LTV STEEL COMPANY, INC.,

Free format text: MERGER AND CHANGE OF NAME EFFECTIVE DECEMBER 19, 1984, (NEW JERSEY);ASSIGNORS:JONES & LAUGHLIN STEEL, INCORPORATED, A DE. CORP. (INTO);REPUBLIC STEEL CORPORATION, A NJ CORP. (CHANGEDTO);REEL/FRAME:004736/0443

Effective date: 19850612