US3553997A - Method of rolling bars cast in continuous casting plants - Google Patents

Method of rolling bars cast in continuous casting plants Download PDF

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Publication number
US3553997A
US3553997A US791299*A US3553997DA US3553997A US 3553997 A US3553997 A US 3553997A US 3553997D A US3553997D A US 3553997DA US 3553997 A US3553997 A US 3553997A
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US
United States
Prior art keywords
rolling
continuous casting
rolls
roll
smaller
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
US791299*A
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English (en)
Inventor
Rudolf Schoffmann
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.)
Voestalpine AG
Voest AG
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Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
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Publication of US3553997A publication Critical patent/US3553997A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • 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

Definitions

  • the present invention relates to a method of rolling bars produced in continuous casting plants and comprises the use of rolls having diameters which are smaller than necessary for fulfilling the bite condition, but as great as or greater than the minimum necessary for fulfilling the haul condition of roll and bar engagement.
  • the present invention relates to a method of rolling bars cast in continuous casting plants.
  • bars produced in continuous casting plants are coggeddown in a rolling mill immediately following the continuous casting plant and containing a number of two-high rolling stands. Prior to its entering the rolling mill the bar usually still has a liquid core, which is forced back by the rolls of the first stand. In order that the bar is gripped by the rolls the bar is allowed to enter while the roll gap is open, whereupon the rolls are adjusted.
  • Ah being the reduction in thickness of the rolling stock between two rolls and d being the roll diameter.
  • the bite condition is met, if the angle of rolling a is smaller than the angle of friction s.
  • the invention has as its object to avoid these disadvantages and ditliculties and in a method of rolling bars cast in continuous casting plants comprises the use of rolls having diameters which are smaller than necessary for fulfilling the bite condition, but as great 'as or greater than necessary for fulfilling the haul condition.
  • the angle of rolling on is smaller than twice the angle of friction s, the latter being a constant of material and dependent upOn the coefiicient of friction according to the formula:
  • rolls may be used the diameters of which are only /5 to /2 of the diameters of rolls used in conventional rolling mills. In this manner the former difiiculties are avoided. Owing to the smaller roll diameters used, the lengths of contact and consequently the durations of contact between rolls and rolling stock are reduced considerably, and thus the degree of cooling-down of the bar is considerably lower. Moreover, the geometric dimensions of the roll stands may be smaller than those of conventional roll stands; consequently the distance between individual stands may be smaller.
  • FIG. 1 illustrates diagrammatically the bite condition with rolls of the diameter d if a bar of the thickness h is reduced to h. on is the angle of rolling, which is as great as or smaller than the angle of friction 5;
  • FIG. 2 illustrates that upon use of rolls with a smaller diameter d while the other components are the same, the bite condition is no longer fulfilled, whereas the haul condition is met.
  • the angle of rolling a is greater than s, yet as great as or smaller than 2s.
  • the method of the invention is carried out by leading the dummy bar through the open roll gaps of the stands in tandem, upon which the rolls of the individual stands, starting with the first stand, are adjusted.
  • the rolling procedure is initiated after the head of the dummy bar has passed through; the head of the bar remains unshaped.
  • the duration of contact between rolls and bar is shortened and the temperature behavior of the bar is improved.
  • the roll pressures and roll momentums necessary are also smaller and, therefore, the stands may be lighter and smaller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US791299*A 1968-05-29 1969-01-15 Method of rolling bars cast in continuous casting plants Expired - Lifetime US3553997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT513068A AT278686B (de) 1968-05-29 1968-05-29 Verfahren zum Walzen von im Stranggußverfahren gegossenen Strängen

Publications (1)

Publication Number Publication Date
US3553997A true US3553997A (en) 1971-01-12

Family

ID=3572253

Family Applications (1)

Application Number Title Priority Date Filing Date
US791299*A Expired - Lifetime US3553997A (en) 1968-05-29 1969-01-15 Method of rolling bars cast in continuous casting plants

Country Status (9)

Country Link
US (1) US3553997A (cs)
AT (1) AT278686B (cs)
BE (1) BE729446A (cs)
CH (1) CH477240A (cs)
DE (1) DE1816799A1 (cs)
ES (1) ES362104A1 (cs)
FR (1) FR2009527A1 (cs)
GB (1) GB1242793A (cs)
SE (1) SE333910B (cs)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106318A (en) * 1974-04-10 1978-08-15 Nippon Steel Corporation Method and apparatus for rolling metallic material
DE2823071A1 (de) * 1977-05-28 1978-11-30 Nippon Steel Corp Verfahren zum walzen von metallwerkstuecken und walzwerk zur durchfuehrung dieses verfahrens
US4307595A (en) * 1977-05-28 1981-12-29 Nippon Steel Corporation Method of rolling a metal workpiece
DE3121851A1 (de) * 1980-06-06 1982-02-18 Morgan Construction Co., 01605 Worcester, Mass. Kontinuierliches warmwalzen mit starker dickenreduzierung - verfahren und anlage
DE3317635A1 (de) * 1983-05-14 1984-11-15 Fried. Krupp Gmbh, 4300 Essen Warmwalzverfahren
CN101821028A (zh) * 2007-10-12 2010-09-01 西门子公司 将轧件导入轧机的轧机机架中的运行方法、控制装置、数据载体以及用来轧制带状轧件的轧机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT346797B (de) * 1975-11-24 1978-11-27 Voest Ag Verfahren zur herstellung von blechen, insbesondere von grobblechen, und einrichtung zur durchfuehrung des verfahrens
DE3839151A1 (de) * 1988-11-17 1990-05-23 Mannesmann Ag Verfahren zum herstellen von warmgewalztem stahlband aus einem bandfoermig stranggegossenem vormaterial
DE10260082A1 (de) 2002-12-19 2004-07-01 Basf Ag Verfahren zur kontinuierlichen Herstellung von Isocyanaten

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106318A (en) * 1974-04-10 1978-08-15 Nippon Steel Corporation Method and apparatus for rolling metallic material
DE2823071A1 (de) * 1977-05-28 1978-11-30 Nippon Steel Corp Verfahren zum walzen von metallwerkstuecken und walzwerk zur durchfuehrung dieses verfahrens
FR2391785A1 (fr) * 1977-05-28 1978-12-22 Nippon Steel Corp Procede de laminage de pieces metalliques et laminoir pour sa mise en oeuvre
US4307595A (en) * 1977-05-28 1981-12-29 Nippon Steel Corporation Method of rolling a metal workpiece
DE3121851A1 (de) * 1980-06-06 1982-02-18 Morgan Construction Co., 01605 Worcester, Mass. Kontinuierliches warmwalzen mit starker dickenreduzierung - verfahren und anlage
DE3317635A1 (de) * 1983-05-14 1984-11-15 Fried. Krupp Gmbh, 4300 Essen Warmwalzverfahren
CN101821028A (zh) * 2007-10-12 2010-09-01 西门子公司 将轧件导入轧机的轧机机架中的运行方法、控制装置、数据载体以及用来轧制带状轧件的轧机
US20100218576A1 (en) * 2007-10-12 2010-09-02 Hans-Joachim Felkl Operating method for introducing a product to be rolled into a roll stand of a roll mill, control device, data carrier, and roll mill for rolling a strip-type product to be rolled
CN101821028B (zh) * 2007-10-12 2014-02-12 西门子公司 将轧件导入轧机的轧机机架中的运行方法和轧制轧件的轧机
US9050637B2 (en) * 2007-10-12 2015-06-09 Siemens Aktiengesellschaft Operating method for introducing a product to be rolled into a roll stand of a roll mill, control device, data carrier, and roll mill for rolling a strip-type product to be rolled

Also Published As

Publication number Publication date
DE1816799A1 (de) 1969-12-04
FR2009527A1 (cs) 1970-02-06
GB1242793A (en) 1971-08-11
AT278686B (de) 1970-02-10
CH477240A (de) 1969-08-31
BE729446A (cs) 1969-08-18
ES362104A1 (es) 1970-12-01
SE333910B (cs) 1971-04-05

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