US3664166A - Method and device for the continuous rolling of thin strips - Google Patents

Method and device for the continuous rolling of thin strips Download PDF

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Publication number
US3664166A
US3664166A US817389A US3664166DA US3664166A US 3664166 A US3664166 A US 3664166A US 817389 A US817389 A US 817389A US 3664166D A US3664166D A US 3664166DA US 3664166 A US3664166 A US 3664166A
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Prior art keywords
strip
rolling
stand
disposed
tension
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Expired - Lifetime
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US817389A
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English (en)
Inventor
Pierre Gay
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Compagnie des Ateliers et Forges de la Loire SA
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Forges De La Loire Comp D Atel
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    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill

Definitions

  • the variations in thickness of the strip formed during the rolling cycle will have the same relative values as the variations in thickness of the strip before the rolling operation.
  • the rolling operation will produce a strip of which the absolute variations in thickness will be smaller than those of the strip before the rolling operation.
  • mechanical connecting means are provided between the two groups of rolls.
  • This ratio may be rendered adjustable by interposing mechanical or hydraulic variable-speed glaring, for example, in this mechanical connection between the two groups.
  • Low-yield rolling mills are also known, on the other hand, i.e. mills wherein the distance between the axes of the rolls varies but littlewhen the rolling effort varies.
  • Rolling mills of this type are adapted to deliver from an input product of irregular thickness, for example a hot-rolled strip, an output product of which the maximum thickness variation will not exceed a few hundredths of millimeter. Now these favorable results cannot be obtained unless the rolling mills are constructed with a high degree of rigidity, or by imparting thereto an apparent rigidity by resorting to known contrivances such as prestress, yield corrections, etc.
  • the method of this invention is characterized in that the previously hot-rolled strip is subjected to a first thicknessregularizing pass in the cold state through a mill permitting of not maintaining to a constant value the thickness variations of the strip before and after the rolling operation, that is, imparting to the strip an elongation which is not necessarily of constant value, this first pass being followed by several rolling passes performed in rolling stands in which a predetermined elongation is imparted to the strip.
  • the device for carrying out the method of this invention comprises a rolling stand for performing said regularizing pass, which is disposed between two tension units imparting to the strip an elongation of which the value is not necessarily constant, said regularizing rolling stand being followed by a plurality of rolling stands each adapted to impart a predetermined elongation to the strip which is worked simultaneously in a plurality of rolling stands, the elongation being imposed in each stand by using tension units disposed on either side of each stand, the rotational speeds of these units being maintained at a constant, adjustable ratio by means of a mechanical connection between these units, the adjustment of this ratio kept at a constant value being obtained by using a variable speed gearing.
  • FIG. 1 illustrates schematically in elevational view the device of this invention in the case of an arrangement wherein the strip is worked simultaneously by a thickness regularizing rolling stand and by further stands each adapted to impart a predetermined elongation thereto;
  • FIG. 2 illustrates schematically in elevation means for carrying out only the strip treatment in a plurality of stands to impart a predetermined elongation thereto, after the strip has been previously treated in a device such as shown in FIG. 1;
  • FIG. 3 illustrates on a larger scale one of the strip-elongating rolling stands
  • FIG. 4 is a plan view of the arrangement illustrated in FIG. 3, showing in greater details the means contemplated for driving the strip through this stand.
  • the hot-rolled coil I mounted on the pay-out reel, followed by a welding unit 2 whereby, when the end of the coil is reached, a fresh coil is substituted therefor and the leading end is butt-welded to the trailing end of the strip remaining in the rolling line.
  • the arrangement comprises a tension unit 3, a loop pit 4 permitting of accumulating a certain strip length to be rolled while the welding unit 2 is performing the aforesaid buttwelding operation, and tension units 5 and 6 disposed on either side of a rolling stand 7 in which a thickness regularizing pass is performed.
  • the strip is directed over a loop roll 8 and then through a series of rolling stands such as 9 each disposed between tension units such as 13 and 14, the velocities of rotation of these units being kept at a constant adjustable ratio by mechanical connecting means shown in diagrammatic form at 15, so that the desired elongation is imparted to the strip.
  • the tension unit 13 and 14 each comprise two rolls 13a and 14a respectively, disposed on either side of a rolling stand consisting of a four-high stand.
  • the rolls 13a are synchronized with each other by means of gears housed in a case 20 and the rolls 14a are also synchronized with each other by other gears housed in a case 21.
  • the trains of gears are driven from shafts 22 and 23 respectively.
  • the conventional driving mechanism designated generally by the reference numeral 15 is adapted to keep the ratio of the velocities of shafts 22 and 23 at a constant value.
  • a variable-speed gearing 24 permits of modifying this constant ratio.
  • a motor 25 provides the power necessary for driving the mechanism 15 and therefore the rolls of units 13 and 14.
  • Another motor 26 drives the rolls of the rolling stand 9.
  • Loop means 8 are interposed between these rolling stands 9 and their function consists in providing a tension on the entering side and on the exit side of the tension units while permitting of accumulating strip.
  • the arrangement is completed by a loop pit 10, a cutting device 11 and a winding reel 12.
  • the coil 1 of FIG. 1 is replaced by a coil 16 delivered from a rolling line of the type illustrated in FIG. 1 in which it was subjected to an equalizing and reducing pass, and was then possibly annealed.
  • This device comprises all the means described hereinabove with reference to FIG. 1, except of course the stand 7 where the thickness regularizing pass is performed; it is therefore not deemed necessary to describe it again.
  • a device for continuously cold-rolling a thin strip comprising a first rolling stand for performing a thickness regularizing pass, two tension units between which said rollingstand is disposed to impart to said strip leaving said stand a more constant thickness than said strip had entering said stand, and a plurality of further rolling stands having tension units disposed on each side of each rolling stand each imparting a predetermined elongation to said strip, said elongation being imposed in each of said further stands by the use of said tension units disposed on each side of each stand, and
  • variable-speed means are provided for adjusting the constant ratio maintained between the rotational speeds of the tension units disposed on either side of each of said further rolling stands.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US817389A 1968-05-16 1969-04-18 Method and device for the continuous rolling of thin strips Expired - Lifetime US3664166A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR152012 1968-05-16

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US3664166A true US3664166A (en) 1972-05-23

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US817389A Expired - Lifetime US3664166A (en) 1968-05-16 1969-04-18 Method and device for the continuous rolling of thin strips

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US (1) US3664166A (es)
DE (1) DE1919815A1 (es)
FR (1) FR1575818A (es)
GB (1) GB1220775A (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086689A (en) * 1976-10-29 1978-05-02 National Steel Corporation Continuous strip reduction cold mill
RU2493924C1 (ru) * 2012-07-31 2013-09-27 Александр Иванович Трайно Способ производства холоднокатаной листовой стали
RU2534693C1 (ru) * 2013-08-13 2014-12-10 Александр Иванович Трайно Способ холодной прокатки стальных полос
RU2811630C1 (ru) * 2023-06-06 2024-01-15 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Способ асимметричной листовой прокатки

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230243C1 (de) * 1992-09-10 1994-01-27 Bwg Bergwerk Walzwerk Rollensatz für die S-förmige Umlenkung zu planierender dünner Metallbänder
DE19950609C2 (de) * 1999-10-21 2001-10-18 Bwg Bergwerk Walzwerk Verfahren zum Reduzieren der Schrottlänge beim Walzen von mittels Schweißnähten verbundener Metallbänder und Tandemstraße zur Durchführung des Verfahrens
CN103537880B (zh) * 2012-07-17 2016-03-30 宝山钢铁股份有限公司 一种激光焊机焊接高强钢的焊接方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2176094A (en) * 1936-05-29 1939-10-17 Carl E Moore Method of treating strip metal
US2264277A (en) * 1939-04-25 1941-12-02 Westinghouse Electric & Mfg Co Control system
US2287380A (en) * 1940-10-15 1942-06-23 Clarence J Klein Metal rolling
US2306792A (en) * 1939-06-15 1942-12-29 Carl E Moore Method of treating annealed strip steel
US3049036A (en) * 1957-04-08 1962-08-14 Westinghouse Electric Corp Automatic strip thickness control apparatus
US3169420A (en) * 1960-07-06 1965-02-16 United Eng Foundry Co Apparatus for tensioning strip
US3170344A (en) * 1961-09-19 1965-02-23 Gen Electric Method and apparatus for controlling the thickness of rolled strip material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2176094A (en) * 1936-05-29 1939-10-17 Carl E Moore Method of treating strip metal
US2264277A (en) * 1939-04-25 1941-12-02 Westinghouse Electric & Mfg Co Control system
US2306792A (en) * 1939-06-15 1942-12-29 Carl E Moore Method of treating annealed strip steel
US2287380A (en) * 1940-10-15 1942-06-23 Clarence J Klein Metal rolling
US3049036A (en) * 1957-04-08 1962-08-14 Westinghouse Electric Corp Automatic strip thickness control apparatus
US3169420A (en) * 1960-07-06 1965-02-16 United Eng Foundry Co Apparatus for tensioning strip
US3170344A (en) * 1961-09-19 1965-02-23 Gen Electric Method and apparatus for controlling the thickness of rolled strip material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086689A (en) * 1976-10-29 1978-05-02 National Steel Corporation Continuous strip reduction cold mill
RU2493924C1 (ru) * 2012-07-31 2013-09-27 Александр Иванович Трайно Способ производства холоднокатаной листовой стали
RU2534693C1 (ru) * 2013-08-13 2014-12-10 Александр Иванович Трайно Способ холодной прокатки стальных полос
RU2811630C1 (ru) * 2023-06-06 2024-01-15 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Способ асимметричной листовой прокатки

Also Published As

Publication number Publication date
FR1575818A (es) 1969-07-25
GB1220775A (en) 1971-01-27
DE1919815A1 (de) 1970-01-15

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