US3670800A - Casting process for rolls - Google Patents

Casting process for rolls Download PDF

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Publication number
US3670800A
US3670800A US829193A US3670800DA US3670800A US 3670800 A US3670800 A US 3670800A US 829193 A US829193 A US 829193A US 3670800D A US3670800D A US 3670800DA US 3670800 A US3670800 A US 3670800A
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United States
Prior art keywords
mold
shell
cast
metal
roll
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Expired - Lifetime
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US829193A
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English (en)
Inventor
Jacques De Vos
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United States Pipe and Foundry Co LLC
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United States Pipe and Foundry Co LLC
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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
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills

Definitions

  • the invention consists of a method for making solid rolls, for
  • FIGS BACKGROUND OF THE INVENTION 1. Field of the Invention In the manufacture of rolls it is necessary to obtaina workingsurface which is suitable for the intended serviceandan inner core including journals which is tough and machineable.
  • journal portions of the roll are formed either by cutting away the hard surface layer from the ends of a cylindrical casting of uniform diameter or by providing means such as sand cores in the ends of the cylindrical mold to reduce the diameter of the end portions.
  • excess metal must first be cast and then machined away, whereas in the second case, a large massive mold structure must be used in the centrifugal operation.
  • the mold placed on the spinner is long enough to provide a casting having a length at least as long as the roll to be cast including the work ing surface necks, i.e., journals and wobblers.
  • the centrifugal process is desirable because it permits the casting of a uniformly thick working surface of high density, but insofar as the solid core, including the journals, is concerned it is not essential that centrifugal casting be used. It is inefficient to use such large centrifugal molds and to load a spinner with a mold large enough to make a complete roll when advantage is gained only by centrifugally casting the working surface por tion of the roll.
  • the present invention provides a method for casting rolls having a working surface of one composition and a solid core of a second composition.
  • a cylindrical shell comprising the working surface of the roll is centrifugally cast in a horizontal mold having removable end plates, then as soon as the shell has solidified and while it is still hot, the end plates are removed, the centrifugal mold is mounted between two journal molds and the solid core portion of the mold is statically cast by filling the resulting mold cavity with molten metal.
  • FIG. 1 illustrates in cross section a centrifugal mold containing a cylindrical l shell which is to form the working surface and which is to be used in making a solid core roll having journal extensions.
  • FIG. 2 illustrates in cross section a centrifugal mold containing a cylindrical shell which forms the working surface inside of which is metallurgically bonded a layer of a second composition.
  • FIG. 3 illustrates in cross section a bottom pour roll mold wherein the centrifugal mold of FIG. 1 has been stacked between bottom and top journal mold sections, the bottom section being provided with a pouring tube.
  • FIG. 4 illustrates in cross section a top pour roll mold wherein the centrifugal mold of FIG. 2 has been stacked between bottom and top journal mold sections, the top section being provided with a pouring basin having a bottom strainer.
  • spinner rollers 1 support and rotate centrifugal mold 2 which has a bore 3 of suitable diameter and length to form the working surface of the, mold, with machining allowances being provided.
  • Each end of the mold is counterbored to provide enlargements 4 and 5 for receiving mold end rings 6 during the centrifugal casting operation and subsequently journal mold sections.
  • the end rings are secured in place by any suitable known means, for example by means of pins driven into radial holes drilled in thecounterbore portion of the mold.
  • the centrifugal mold illustrated is provided with a circumferential band 7 provided with diametrically opposite recesses 8 and 9 into which trunnions may be inserted when the mold is to be picked up and transferred to the roll molding station (see trunnions l3 and 14 inFIG. 3).
  • Shell 10 is centrifugally cast in known manner of metal having the properties desired in the working surface of the roll to be made and of sufficient thickness to give the desired thickness in the finished roll with allowance being made for any remelting during the casting of the solid core.
  • a small flange 11 is formed at one end of the shell to assure that it will not slip from the mold when it is rotated to the vertical position with the flange 11 at the top end. 1
  • FIG. 2 is in all respects the same as FIG. 1 except that shell 10 has been provided with an inner layer 12of asecond composition, for example, the composition to be used in the roll core.
  • This layer is cast at the proper time after pouring of shell 11 and under proper conditions to form a metallurgically bonded dual-metal structure in accordance with known procedures.
  • a cushion between the shell and inner core is provided, and intermixing and remelting of the working surface layer can be closely controlled and minimized.
  • the bottom journal mold consists of a metal flask 16 in which a sand mold. 17 is provided to form a cavity 18 of the desired configuration for the as cast roll journal. If bottom pouring is to be used, pouring tube 19 is attached to the bottom journal mold.
  • the top journal mold 20 which consists of metal flask 21 and a sand lining 22 forming a cavity 13 to give the desired as cast journal shape, is seated in the upright counterbore 5.
  • the roll mold assembly is then complete and molten metal of proper composition is poured through pouring tube 19 to fill cavities 18 and 23 and the hollow interior of shell 10.
  • FIG. 4 the centrifugal mold of FIG. 2 is illustrated mounted in a mold assembly where top pouring is to be used.
  • a pouring basin 24 is placed on mold section 20, and preferably a strainer 25 is provided to prevent slag from entering the mold.
  • a chill irongray iron rolling mill roll having a working surface 600 mm long, an outside diameter of 340 mm and two cylindro-conical necks having a length of 600 mm and diameter varying between 200 and mm is presently prepared by casting against a chill or by a double pour method wherein a first composition is poured into a mold and then flushed out with a second composition after a shell of the first composition has solidified against the chill.
  • a superior roll can be prepared by centrifugally casting a white iron shell having an as cast working surface 600 mm long, an outside diameter of 355 mm and an inside diameter of 270 mm com posed of 3.3 percent Carbon, 0.4 percent Silicon, 0.6 percent Manganese, 4.5 percent Nickel, 1.5 percent Chromium and 0.4 percent Molybdenum, and casting within the shell a core including necks, composed of 3.0 percent Carbon, 1.5 percent Silicon, 0.5 percent Nickel and 0.5 percent Chromium.
  • the outer shell will have uniform thickness and physical properties because the thickness is controlled by the amount of metal cast, and the composition can be selected to give the properties desired in the shell without regard to how the composition would serve in the core portion.
  • the core portion can be made of a composition which will assure the desired amount of toughness and machineability.
  • a method for casting rolls having a working surface formed of a first metal composition and a solid core portion with journal extensions fonned of a second metal composition comprising: mounting a generally cylindrical mold having a length at least equal to the length of the working surface of the roll to be cast and less than the total length of the roll to be cast, and having removable end plates at both ends thereof in a centrifugal casting machine, centrifugally casting an outer shell of said first metal composition in the cylindrical mold,
  • the shell having suitable outside diameter, length and thickness to form the working surface of the roll, and the length thereof being substantially equal to the length of said mold removing the end plates from the mold when the shell has solidified and while it remains hot; removing the cylindrical mold containing the shell from the centrifugal casting machine; and mounting said centrifugal mold including the shell between two journal molds; and filling the cavity formed by said two journal molds and the interior of said shell with metal of said second metal composition to form a solid core with journal extensions metallurgically bonded to said shell.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
US829193A 1968-06-12 1969-06-02 Casting process for rolls Expired - Lifetime US3670800A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE48027 1968-06-12

Publications (1)

Publication Number Publication Date
US3670800A true US3670800A (en) 1972-06-20

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US829193A Expired - Lifetime US3670800A (en) 1968-06-12 1969-06-02 Casting process for rolls

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US (1) US3670800A (enExample)
AT (1) AT310365B (enExample)
CH (1) CH503532A (enExample)
DE (1) DE1929676A1 (enExample)
FR (1) FR2010791A1 (enExample)
LU (1) LU58861A1 (enExample)
NL (1) NL6908675A (enExample)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894325A (en) * 1973-05-11 1975-07-15 Hitachi Metals Ltd Large-sized and thick compound sleeves of high hardness
US3972366A (en) * 1974-11-29 1976-08-03 Blaw-Knox Foundry & Mill Machinery, Inc. Method of and apparatus for making compound rolls
US4117877A (en) * 1977-11-22 1978-10-03 Kabushiki Kaisha Yodogawaseikosho Method of manufacturing large-sized centrifugally cast composite roll and device for disposing lower side pouring sprue runner used in the method
EP0800902A1 (de) * 1996-04-11 1997-10-15 Schenck Panel Production Systems GmbH Verfahren zur kontinuierlichen Herstellung eines Vlieses für die Herstellung von Holzwerkstoff- oder ähnlichen Platten
US6013141A (en) * 1995-06-06 2000-01-11 Akers International Ab Cast iron indefinite chill roll produced by the addition of niobium
US20070259201A1 (en) * 2003-12-01 2007-11-08 Thomas Holzhauer Reel Driving Device Comprising Driving Rolls Provided with a Cast Envelope
US20080226936A1 (en) * 2004-09-13 2008-09-18 Hitachi Metals, Ltd. Centrifugally Cast External Layer for Rolling Roll and Method for Manufacture Thereof
RU2338623C1 (ru) * 2007-04-18 2008-11-20 Закрытое акционерное общество "Механоремонтный комплекс" Способ центробежной отливки массивных биметаллических валков со сплошным сечением
US20100292061A1 (en) * 2007-02-20 2010-11-18 Soentgen Thomas Cylinder and/or roller and a process for the production of a cylinder and/or roller
RU2727369C1 (ru) * 2019-12-30 2020-07-21 Открытое Акционерное Общество "Тяжпрессмаш" Способ однонаправленного и ускоренного затвердевания крупногабаритных толстостенных центробежно-литых стальных заготовок
RU2802046C1 (ru) * 2022-07-27 2023-08-22 Публичное акционерное общество "Тяжпрессмаш" Способ производства двухслойных труб большого диаметра для главного циркуляционного трубопровода аэс

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428782A1 (fr) * 1978-06-13 1980-01-11 Pont A Mousson Elements tubulaires en acier pour conduites en mer
NL8102040A (nl) * 1981-04-24 1982-11-16 Kubota Ltd Bewerkingswals met hoog chroomgehalte, alsmede werkwijze ter vervaardiging daarvan.

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1057713A (en) * 1911-05-27 1913-04-01 Evan Llewelyn Davies Mill-roll.
US1387792A (en) * 1916-03-17 1921-08-16 Frank E Mckenna Art of casting ingots
US1514129A (en) * 1921-06-08 1924-11-04 Frank E Clark Production of hollow ingots
US1707117A (en) * 1924-05-03 1929-03-26 Frank B Foster Method for making metal castings
US1934901A (en) * 1930-04-16 1933-11-14 Witting Bruno Process for producing metal rollers
US2008196A (en) * 1932-04-13 1935-07-16 Weber Karl Centrifugal casting machine
US2483849A (en) * 1947-05-02 1949-10-04 William H Seaman Method of making composite castings
US2710997A (en) * 1952-06-13 1955-06-21 Campbell Wyant & Cannon Co Method of producing bimetal castings
US2841846A (en) * 1953-05-19 1958-07-08 Otani Kokichi Method of making metal castings
US3414044A (en) * 1966-05-12 1968-12-03 Beloit Corp Method of making bimetallic tubular article
US3563300A (en) * 1967-07-01 1971-02-16 Kubota Iron & Machinery Works Centrifugal casting of a composite roller

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1057713A (en) * 1911-05-27 1913-04-01 Evan Llewelyn Davies Mill-roll.
US1387792A (en) * 1916-03-17 1921-08-16 Frank E Mckenna Art of casting ingots
US1514129A (en) * 1921-06-08 1924-11-04 Frank E Clark Production of hollow ingots
US1707117A (en) * 1924-05-03 1929-03-26 Frank B Foster Method for making metal castings
US1934901A (en) * 1930-04-16 1933-11-14 Witting Bruno Process for producing metal rollers
US2008196A (en) * 1932-04-13 1935-07-16 Weber Karl Centrifugal casting machine
US2483849A (en) * 1947-05-02 1949-10-04 William H Seaman Method of making composite castings
US2710997A (en) * 1952-06-13 1955-06-21 Campbell Wyant & Cannon Co Method of producing bimetal castings
US2841846A (en) * 1953-05-19 1958-07-08 Otani Kokichi Method of making metal castings
US3414044A (en) * 1966-05-12 1968-12-03 Beloit Corp Method of making bimetallic tubular article
US3563300A (en) * 1967-07-01 1971-02-16 Kubota Iron & Machinery Works Centrifugal casting of a composite roller

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894325A (en) * 1973-05-11 1975-07-15 Hitachi Metals Ltd Large-sized and thick compound sleeves of high hardness
US3972366A (en) * 1974-11-29 1976-08-03 Blaw-Knox Foundry & Mill Machinery, Inc. Method of and apparatus for making compound rolls
US4117877A (en) * 1977-11-22 1978-10-03 Kabushiki Kaisha Yodogawaseikosho Method of manufacturing large-sized centrifugally cast composite roll and device for disposing lower side pouring sprue runner used in the method
US6013141A (en) * 1995-06-06 2000-01-11 Akers International Ab Cast iron indefinite chill roll produced by the addition of niobium
EP0800902A1 (de) * 1996-04-11 1997-10-15 Schenck Panel Production Systems GmbH Verfahren zur kontinuierlichen Herstellung eines Vlieses für die Herstellung von Holzwerkstoff- oder ähnlichen Platten
US20070259201A1 (en) * 2003-12-01 2007-11-08 Thomas Holzhauer Reel Driving Device Comprising Driving Rolls Provided with a Cast Envelope
US20080226936A1 (en) * 2004-09-13 2008-09-18 Hitachi Metals, Ltd. Centrifugally Cast External Layer for Rolling Roll and Method for Manufacture Thereof
US8156651B2 (en) * 2004-09-13 2012-04-17 Hitachi Metals, Ltd. Centrifugally cast external layer for rolling roll and method for manufacture thereof
US20100292061A1 (en) * 2007-02-20 2010-11-18 Soentgen Thomas Cylinder and/or roller and a process for the production of a cylinder and/or roller
RU2338623C1 (ru) * 2007-04-18 2008-11-20 Закрытое акционерное общество "Механоремонтный комплекс" Способ центробежной отливки массивных биметаллических валков со сплошным сечением
RU2727369C1 (ru) * 2019-12-30 2020-07-21 Открытое Акционерное Общество "Тяжпрессмаш" Способ однонаправленного и ускоренного затвердевания крупногабаритных толстостенных центробежно-литых стальных заготовок
RU2802046C1 (ru) * 2022-07-27 2023-08-22 Публичное акционерное общество "Тяжпрессмаш" Способ производства двухслойных труб большого диаметра для главного циркуляционного трубопровода аэс
RU2806681C1 (ru) * 2022-12-07 2023-11-02 Публичное акционерное общество "Тяжпрессмаш" Способ изготовления стальных бесшовных заготовок корпусов баллонов большого объема для хранения и транспортировки сжатых и сжиженных газов

Also Published As

Publication number Publication date
FR2010791A1 (enExample) 1970-02-20
NL6908675A (enExample) 1969-12-16
DE1929676A1 (de) 1969-12-18
CH503532A (fr) 1971-02-28
LU58861A1 (enExample) 1969-11-10
AT310365B (de) 1973-09-25

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Owner name: WALTER INDUSTRIES, INC., FLORIDA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNITED STATES PIPE AND FOUNDRY COMPANY;REEL/FRAME:004890/0562

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Owner name: WALTER INDUSTRIES, INC., 1500 NORTH DALE MABRY HIG

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Owner name: UNITED STATES PIPE AND FOUNDRY COMPANY, 3300 FIRST

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WALTER INDUSTRIES, INC.;REEL/FRAME:004873/0973

Effective date: 19880517