US3757556A - Method of roughing slab to predetermined width and apparatus thereof - Google Patents

Method of roughing slab to predetermined width and apparatus thereof Download PDF

Info

Publication number
US3757556A
US3757556A US00129777A US3757556DA US3757556A US 3757556 A US3757556 A US 3757556A US 00129777 A US00129777 A US 00129777A US 3757556D A US3757556D A US 3757556DA US 3757556 A US3757556 A US 3757556A
Authority
US
United States
Prior art keywords
slab
width
rolls
rolling
horizontal
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
Application number
US00129777A
Other languages
English (en)
Inventor
T Kawawa
M Kamata
Y Ikegami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Application granted granted Critical
Publication of US3757556A publication Critical patent/US3757556A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/12—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process axes being arranged in different planes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B1/04—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing in a continuous process

Definitions

  • This invention relates to a method of roughing slabs to a predetermined width and an apparatus for carrying out same, and more specifically to such a technique suitable for roughing slabs of thin plate material which may be obtained from a continuously casting process.
  • the slab may be rolled to the thickness of the final product in subsequent processes.
  • the thickness may be rolled and altered easily, however, the width dimension is difficult to alter.
  • the width of a thin plate material may vary substantially from 700 mm to 2,000 mm with the upper limit approximately three times the lower limit.
  • prior art methods and apparatus employ means for controlling the ingot sizes, or means for controlling the hot strip mill comprising the rougher.
  • these prior art methods and apparatus are unsatisfactory in that the controlling of those steps are in themselves limited.
  • the present invention is based on inventors discovery that if the width of continuous cast slab can be rolled to a certain range of widths by roughing stands placed in front of a tandem mill, the hot strip material, being within that range, can be applied with such a slab which is cast in the mold of a fixed size. According to this invention, it is not necessary to stop the casting for each melting as is now necessary using conventional methods. The melting of at least several times can be continuously performed with a mold of a fixed size, so that the advantageous merits of continuous casting may be enjoyed at its maximum and the operating rate of the continuous casting process may be elevated.
  • FIG. 1 shows an arranging line of rolls of the conventional continuous rough-rolling mill
  • FIG. 2 depicts an arranging line of rolls of one of the continuous rough rolling mills of the invention
  • FIG. 3 shows the front view of a calibered edging roll using the invention
  • FIG. 4 shows a deformed condition of the material using a convention flat edging roll
  • FIG. 5 shows the deformed condition of a material using the calibered edging roll of the invention
  • FIGS. 6A, 6B and 6C show an arrangement of rolls of a continuous rolling mill using the scheme of FIG. 2;
  • FIG. 7 shows an arrangement of rolls used in a reversible rolling mill
  • FIGS. 8A and 8B show two arrangements of rolls employing the scheme of FIG. 7.
  • FIG. 1 depicts an arranging line of rolls of a conventional rough rolling mill in which the rolling reduction of the width of the roughed plate by action of a first step vertical scale breaker 1 is 40 mm at maximum, and reduction caused by the four stands 2,3,4 and 5 subsequent thereto is about 20 mm at maximum. The entire rolling reduction is about 60 mm. For this reason the vertical rolls for adjusting the width arranged in front of the second stand of the horizontal rolls are flat edging rolls. In case of strong rolling of the width, only selvages of the slab are rolled. The deformation is not uniformly spread to the width, and the slab is subject to buckling.
  • the present invention offers a rough rolling method for rolling the width of the slab, in which the vertical rolls having at least a pair of calibers, are arranged in front of horizontal rolls.
  • the continuous roughing mill generally operates the hot-rolling at the finishing temperature of more than A transformation, e.g., when the proeutectoid ferrite or cementite is substantially absorbed into austenite, preferably at about l,100C to 1,300C.
  • the vertical rolls may also be in front or close to the horizontal rolls of a reversible type roughing mill.
  • FIG. 2 depicts an embodiment of the invention in which an arrangement of rolls comprise vertical scale breaker 10, and third stands 13,14, and 15 each comprising a pair of flat edging rolls l6 and horizontal rolls 17.
  • the first stand 11 is arranged with the horizontal rolls 17 and two pairs of calibered rolls 18, which are for rolling the width according to the invention, and is used instead of the prior art flat edging rolls.
  • the second stand 12 is, in the rolling order, comprised of calibered vertical rolls 18, flat edging rolls 16 and horizontal rolls 17.
  • the calibered vertical rolls 18 are shown in greater detail in FIG. 3.
  • the rolls 18 are, as depicted, formed with calibers at their periphery.
  • These rolls 18, advantageously, are not limited to rolling only selvages, as is the case with prior art flat rolls, but instead enable uniform deformation of the slab as to width because the slabs are inserted into the calibers.
  • advantageously, buckling is not produced, as was inherent with prior art methods. Accordingly, heavy rolling is possible with this invention.
  • the rolling reduction of the width in the first step with the inventive calibered rolls will be more or less different depending upon the width of the slab. However, generally, it is preferable to attain the object of 120 mm (substantially 80 to 90 mm) in the case of the width being more than 1,400 mm, and to aim for 150 mm (substantially 120 to 130 mm) in the case of widths of not more than 1,400 mm.
  • the thickness of the slab affected with compression to the width may be voluntarily chosen, but it is preferable to have the thickness reach the objective of more than 180 mm, preferably around 200 to 350 mm.
  • a horizontal pinch roll 19 may be placed prior to the first stand 11, in which case the deformation amount is substantial in the case of such calibered rolls.
  • molds for continuous casting may be used to produce the slabs, the widths of which vary as much as from 700 to 2,000 mm.
  • molds of for example I,000,1,500 and 2,000 mm in width the thin plate of from 700 mm to 2,000mm in width can be produced.
  • any of the slabs can be produced, with two or three molds, nd that the and of the calibered rolls shown in FIG. 2, be designed so as to provide a reduction of widths of from 400 mm toSOO mm at maximum. In other words, if the rolling reduction by one calibered roll is about 150 mm, three arrangement can provide a reduction of about 450 mm.
  • the rolling reduction of about 50 mm by the scale breaker may be added thereto, thereby to reduce the width about 500 mm to 600 mm at a maximum.
  • the three stands of the third and subsequent stands are useful to accurately control the thickness and width of the slab rolled to the predetermined width, and are arranged successively to the subsequent tandem rolling.
  • FIGS. 6a, 6b and 6c show three embodiments of arranging rolls of a continuous rough rolling mill. Such an arrangement takes into consideration the special circumstances of the factory employing same, and using the scheme of FIG. 2.
  • Depicted in FIG. 6a) are two pairs of calibered rolls arranged at the first stand 11 only.
  • FIG. 6b are a pair of calibered rolls arranged respectively at the first and second stands 11 and 12.
  • FIG. 6c are three pairs of calibered rolls arranged at the first stand 11, and a pair thereof at the second stand 12.
  • the first, second and third stands are the same in each of FIGS. 60, 6b and 6c and are as shown in FIG. 2.
  • FIG. 7 or FIGS. and 8b show the realized embodiments of a reversible rough-rolling mill, comprising a first stand 20 and a second stand 21.
  • the slab may be repeatedly reciprocated between the first and second stands.
  • the first stand 20 comprises horizontal rolls 22, calibered vertical rolls 23, and the second stand 21 comprises flat edging rolls 24, and horizontal rolls 25.
  • the calibered vertical rolls 23 are similar to that shown in FIG. 2.
  • the horizontal rolls 22 of the first stand 20 serve the same purpose as the pinch rolls 19 in FIG. 2.
  • the thickness and width are adjusted by flat rolls 24 (See FIG. '7), and the horizontal rolls 25 (See FIGS. 8a, 8b) of the second stand 21, followed by feeding the slab to the subsequent tandem mill.
  • the rough rolling mill to alter the width of the slab, is furnished with at least one pair of calibered verticai rolls to roll the slab to a predetermined width.
  • the invention avoids such possibilities as only rolling selvages, or producing non-uniform deformity, or buckling, as occur in prior art apparatus.
  • This invention advantageously, produces rolling to a large range of widths, enhances the advantages of continuous casting by enabling casting with a fixed mold, and increases the rate of operation of the mill.
  • EXAMPLE 1 Rimmed steel, the contents of which were C,0.05 to 0.12%; Mn,0.3 to 0.6%; Si,0.05 to 0.15%; P,less than 0.03%; S,0.03% and Al,0.005 to 0.02%, was passed through continuous casting to provide a slab of width 1,910 mm and thickness about 1,230C and fed into FIG. 2 line at a temperature of 225 mm. The slab was extracted at/around 1,200C at the entrance of the rough-rolling mill. The variances of the width at the respective roughing stands are shown in Table 1, and the width became finally 1,470 mm. The reduction of width was 440 mm and the temperature was 1,080C at the exit of the rough rolling mill.
  • EXAMPLE 2 Al killed steel, the contents of which were C,0.04 to 0.06%; Mn,0.2 to 0.6%; Si, trace; P,less than 0.025percent; S,less than 0.02% and Al,0.25 to 0.65%, was changed into a slab of width 1,600 mm, thickness 200 mm, and length 8,000mm.
  • the slab was extracted at 1,250C from the furnace and fed at 1,200C to the rough rolling mill to be roughed.
  • the temperature thereof was l,O70C at the exit of the rough rolling mill.
  • the variances of the width and thickness at the respective stands of the reversible rough rolling mill are shown in Table 2.
  • Method of width rolling to obtain improved rough dimensioning of the width of a continuous or noncontinuous cast slab with one or more rolling stations comprising the steps of feeding said slab to said one or more rolling stations, rolling at one of said rolling stations each width end of said slab by application of a force to each of said width ends in a direction substantially parallel to the width direction and in a plane perpendicular to said width direction and extending substantially along the thickness of said slab and concurrently therewith application of a set of forces to each of said width ends in directions at opposing oblique angles to said plane, and rolling said slab to thickness at one or more of the other rolling stations.
  • Apparatus for improved rough width rolling of a continuous or non-continuous cast slab comprising means for compressing the width end portions of said slab with concurrent pressures applied to both said width ends in a plane with the thickness dimension about the thickness of said slab and in planes disposed at opposing oblique angles to said one plane at said ends, means for feeding said slab to said means for compressing, and means for thickness rolling said slab.
  • said means for compressing comprises one or more pairs of vertical caliber rolls
  • said means for feeding comprises a horizontal roll, and further comprising vertical scale breakers positioned before said calibered rolls.
  • said means for compressing comprises a plurality of vertical calibered rolls, and further comprising vertical edge rolls and horizontal rolls with one or more pairs of said claibered being disposed selectively adjacent to one or more of said vertical edge rolls and said horizontal rolls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US00129777A 1971-03-17 1971-03-31 Method of roughing slab to predetermined width and apparatus thereof Expired - Lifetime US3757556A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
AU26656/71A AU451473B2 (en) 1971-03-17 1971-03-17 Method and apparatus for roughing slab to width
NL7103691A NL7103691A (enrdf_load_stackoverflow) 1971-03-17 1971-03-19
DE19712114346 DE2114346A1 (de) 1971-03-17 1971-03-24 Verfahren und Vorrichtung zum Vorwalzen von Brammen bezueglich ihrer Breite
FR717110600A FR2129997B1 (enrdf_load_stackoverflow) 1971-03-17 1971-03-25
US12977771A 1971-03-31 1971-03-31
GB911471 1971-04-08

Publications (1)

Publication Number Publication Date
US3757556A true US3757556A (en) 1973-09-11

Family

ID=27542621

Family Applications (1)

Application Number Title Priority Date Filing Date
US00129777A Expired - Lifetime US3757556A (en) 1971-03-17 1971-03-31 Method of roughing slab to predetermined width and apparatus thereof

Country Status (6)

Country Link
US (1) US3757556A (enrdf_load_stackoverflow)
AU (1) AU451473B2 (enrdf_load_stackoverflow)
DE (1) DE2114346A1 (enrdf_load_stackoverflow)
FR (1) FR2129997B1 (enrdf_load_stackoverflow)
GB (1) GB1349682A (enrdf_load_stackoverflow)
NL (1) NL7103691A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848447A (en) * 1972-11-06 1974-11-19 Metalform Ab Rolling method and a rolling mill for carrying out the method
US4285227A (en) * 1979-05-30 1981-08-25 Nhk Spring Co., Ltd. Edge roll assembly for manufacturing a taper leaf spring
EP0035302A1 (en) * 1980-02-28 1981-09-09 Hoogovens Groep B.V. A process for reducing the width of a flat metal product by rolling
DE3302333A1 (de) * 1982-03-02 1983-09-08 Sumitomo Metal Industries, Ltd., Osaka Verfahren und vorrichtung zur einstellung der breite und dicke eines bandstahls
US4587823A (en) * 1982-12-08 1986-05-13 Blaw-Knox Corporation Apparatus and method for press-edging hot slabs
US5511303A (en) * 1992-05-12 1996-04-30 Tippins Incorporated Intermediate thickness and multiple furnace process line
US20090087679A1 (en) * 2007-10-02 2009-04-02 Precision Tube Technology, Lp Method of Manufacturing Lined Tubing
CN107282632A (zh) * 2017-05-08 2017-10-24 首钢水城钢铁（集团）有限责任公司 一种螺纹钢成品波浪纹优化工艺
IT201900001159A1 (it) * 2019-01-25 2020-07-25 Danieli Off Mecc Metodo di laminazione di bramme sottili
CN114888083A (zh) * 2022-06-25 2022-08-12 湖南华菱湘潭钢铁有限公司 一种中厚板轧机轧制宽薄板的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922602B2 (ja) * 1979-02-24 1984-05-28 日本鋼管株式会社 熱間粗圧延中におけるスラブの板幅の自動制御方法
CA1243510A (en) * 1983-07-13 1988-10-25 Atsuo Mizuta Process for width reduction of plate-like stock material
RU2453384C2 (ru) * 2010-08-30 2012-06-20 Закрытое акционерное общество "Волгоградский металлургический завод "Красный Октябрь" (ЗАО "ВМЗ "Красный Октябрь") Способ прокатки слябов из слитков

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296513A (en) * 1963-08-09 1967-01-03 Bethlehem Steel Corp Reversing motor control including load sensing to determine optimum reversal point
US3323342A (en) * 1965-03-31 1967-06-06 Coil Anodizers Inc Method and means for smoothing edges of strip material
US3336778A (en) * 1964-06-08 1967-08-22 Anaconda Wire & Cable Co Edge-forming apparatus and method
US3367162A (en) * 1965-04-07 1968-02-06 United States Steel Corp Apparatus for reducing slab width
US3422656A (en) * 1966-03-18 1969-01-21 United States Steel Corp Method of rolling slabs in planetary mill
US3557595A (en) * 1967-03-17 1971-01-26 Siegener Maschinenbau Gmbh Universal rolling mill
US3580032A (en) * 1969-04-17 1971-05-25 United Eng Foundry Co Apparatus for reducing the width of metallic slabs
US3587275A (en) * 1968-08-21 1971-06-28 Francis P Brennan Edge rolling mechanism
US3688548A (en) * 1969-06-03 1972-09-05 Mitsubishi Aluminium Apparatus for the manufacture of aluminum strip conductors

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1934302C3 (de) * 1969-07-05 1974-04-25 Hoesch Werke Ag, 4600 Dortmund Verfahren und Vorrichtung zum Warmwalzen von Metallbrammen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296513A (en) * 1963-08-09 1967-01-03 Bethlehem Steel Corp Reversing motor control including load sensing to determine optimum reversal point
US3336778A (en) * 1964-06-08 1967-08-22 Anaconda Wire & Cable Co Edge-forming apparatus and method
US3323342A (en) * 1965-03-31 1967-06-06 Coil Anodizers Inc Method and means for smoothing edges of strip material
US3367162A (en) * 1965-04-07 1968-02-06 United States Steel Corp Apparatus for reducing slab width
US3422656A (en) * 1966-03-18 1969-01-21 United States Steel Corp Method of rolling slabs in planetary mill
US3557595A (en) * 1967-03-17 1971-01-26 Siegener Maschinenbau Gmbh Universal rolling mill
US3587275A (en) * 1968-08-21 1971-06-28 Francis P Brennan Edge rolling mechanism
US3580032A (en) * 1969-04-17 1971-05-25 United Eng Foundry Co Apparatus for reducing the width of metallic slabs
US3688548A (en) * 1969-06-03 1972-09-05 Mitsubishi Aluminium Apparatus for the manufacture of aluminum strip conductors

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848447A (en) * 1972-11-06 1974-11-19 Metalform Ab Rolling method and a rolling mill for carrying out the method
US4285227A (en) * 1979-05-30 1981-08-25 Nhk Spring Co., Ltd. Edge roll assembly for manufacturing a taper leaf spring
EP0035302A1 (en) * 1980-02-28 1981-09-09 Hoogovens Groep B.V. A process for reducing the width of a flat metal product by rolling
US4532789A (en) * 1980-02-28 1985-08-06 Estel Hoogovens B.V. Process for reducing the width of a flat metal product by rolling
DE3302333A1 (de) * 1982-03-02 1983-09-08 Sumitomo Metal Industries, Ltd., Osaka Verfahren und vorrichtung zur einstellung der breite und dicke eines bandstahls
US4555921A (en) * 1982-03-02 1985-12-03 Sumitomo Metal Industries, Ltd. Method and apparatus for controlling width and thickness of strip
US4587823A (en) * 1982-12-08 1986-05-13 Blaw-Knox Corporation Apparatus and method for press-edging hot slabs
US5511303A (en) * 1992-05-12 1996-04-30 Tippins Incorporated Intermediate thickness and multiple furnace process line
US20090087679A1 (en) * 2007-10-02 2009-04-02 Precision Tube Technology, Lp Method of Manufacturing Lined Tubing
US7934304B2 (en) * 2007-10-02 2011-05-03 Tenaris Coiled Tubes, Llc Method of manufacturing lined tubing
CN107282632A (zh) * 2017-05-08 2017-10-24 首钢水城钢铁（集团）有限责任公司 一种螺纹钢成品波浪纹优化工艺
IT201900001159A1 (it) * 2019-01-25 2020-07-25 Danieli Off Mecc Metodo di laminazione di bramme sottili
CN114888083A (zh) * 2022-06-25 2022-08-12 湖南华菱湘潭钢铁有限公司 一种中厚板轧机轧制宽薄板的方法

Also Published As

Publication number Publication date
AU451473B2 (en) 1974-07-24
FR2129997A1 (enrdf_load_stackoverflow) 1972-11-03
GB1349682A (en) 1974-04-10
FR2129997B1 (enrdf_load_stackoverflow) 1974-03-01
DE2114346A1 (de) 1972-10-05
AU2665671A (en) 1972-09-21
NL7103691A (enrdf_load_stackoverflow) 1972-09-21

Similar Documents

Publication Publication Date Title
US3757556A (en) Method of roughing slab to predetermined width and apparatus thereof
US4086801A (en) H-shape metallic material rolling process
RU2268098C2 (ru) Способ изготовления тонких плоских изделий и установка для его осуществления
US3165948A (en) Method of rolling h-sectioned steel members and mill train for the same
JPH07195101A (ja) 可逆運転で作動する圧延装置による粗輪郭から仕上げ輪郭に圧延するための方法
US4171632A (en) Method of and apparatus for hot-rolling a thin metal sheet
US3693393A (en) Rolling of metal ingots into bands
US4067220A (en) Rolling of billets
US3425254A (en) Rolling of slabs
KR101990987B1 (ko) 두께와 폭을 동시에 압연하는 압연장치
JP2786557B2 (ja) 熱間スラブの幅プレス用金敷
JPH11151526A (ja) パイプのロール予備成形方法
JPH07171602A (ja) 外法一定平行フランジ溝形鋼の製造方法
US3253446A (en) Reverse angle planetary mill
JPS5919764B2 (ja) 角形形鋼の製造方法
KR950004432B1 (ko) 평행 플랜지(Flange) 형강의 웨브(Web)폭의 자유자재 변경 압연방법 및 장치
JP3221561B2 (ja) ステンレス鋼板の製造方法
KR20020051474A (ko) 폭압하량 결정방법
JPH026001A (ja) 形鋼の圧延方法
JPS5997702A (ja) 溝形鋼の圧延方法およびその方法で用いるエツジヤロ−ル
SU839624A1 (ru) Способ прокатки листов
JPH0824926B2 (ja) フランジを有する形材の圧延方法
JP2676430B2 (ja) 溝形鋼の熱間圧延方法及びその圧延装置列
JPH06335701A (ja) 形鋼の圧延方法および圧延装置
JPH0446641B2 (enrdf_load_stackoverflow)