US3592051A - Apparatus for method for determining the degree of elongation of metal strips - Google Patents

Apparatus for method for determining the degree of elongation of metal strips Download PDF

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Publication number
US3592051A
US3592051A US840810A US3592051DA US3592051A US 3592051 A US3592051 A US 3592051A US 840810 A US840810 A US 840810A US 3592051D A US3592051D A US 3592051DA US 3592051 A US3592051 A US 3592051A
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US
United States
Prior art keywords
strip
metal strip
elongation
degree
amplitude
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
US840810A
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English (en)
Inventor
Moritada Kubo
Kuniji Asano
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • 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
    • B21B37/56—Elongation control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/28—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures

Definitions

  • crown roll denotes the type, the central portion of which generally projects outward, as well as a simple cylindrical type.
  • the crown roll is designed to receive an external load to be so curved as to allow a greater pressure to be applied to the central part of a rolled strip, and to eliminate the appearance of central undulations, said roll also receives such an external load to be so curved as to allow a greater pressure to be applied to the edge portion of a rolled strip. Accordingly, the occurrence of edge or central undulations can be restricted according to the manner in which the external load is impressed.
  • the present invention consists in forcibly applying at the outlet of work rolls vibrations like those having a standing wave of a prescribed wavelength to a travelling metal strip and measuring the amplitude of these vibrations without touching the strip, thereby defining the degree of its elongation.
  • FIGS. 1A and 1B are schematic perspective views of the typical examples of the deformation of a rolled metal strip
  • FIG. 2 is a diagrammatic represention of an apparatus according to an embodiment of the present invention.
  • FIG. 3 is an enlarged diagram of the main part of the embodiment of FIG. 2;
  • FIG. 4 is a schematic diagram of a means for detecting the amplitude of vibrations as employed in the embodiment of FIG. 2;
  • FIG. 5 is a block diagram showing a circuit for determining the degree of elongation.
  • FIG. 6 is a schematic diagram of an apparatus according to another embodiment of the invention.
  • FIG. I Before describing an embodiment of the present invention, let us refer to FIG. I in which the aforesaid central and edge undulations of the strip 1 are denoted by 1a and 1b respectively.
  • FIG. 2 a first figure of the present invention
  • metal strip 1 is rolled by a pair of work rolls 2 supported by a pair of backup rolls 3, and wound about a takeup reel 5 in the direction of an arrow by the medium of a guide roll 4. Between the work rolls 2 and guide roll 4 are disposed two pair of keep rolls 6 and 7 at a prescribed space L. These keep rolls 6 and 7 so act as to restrict the scope of the vibrations of the strip 1 occuring in the direction of its thickness.
  • Numeral 8 represents vibration means disposed on the opposite sides of the strip 1. These vibration means 8 are operated by turns to vibrate the strip 1 at a prescribed frequency in the direction of the arrow 9 so as to forcibly generate vibration waves like standing waves (hereinafter referring to as the standing wave").
  • the vibration means 8 may consist of those which eject, for example, the fluid to the strip 1 by turns, or those which alternately apply an electromagnetic force to the strip 1 if it is made of a magnetizable material, and can be easily prepared by the known techniques.
  • Numeral 11 is a detector for detecting the amplitude A of the standing wave 10.
  • Numeral 12 is a guage for measuring the distance between the aforesaid two pairs of keep rolls 6 and 7, which may be formed of a potentiometer interlocking with, for example, said keep rolls 6 and 7. Signals representing the measured distance L and those issued from the detector 11 are conducted to a circuit 13 for computing the degree of elongation of a metal strip.
  • Numeral 14 denotes signals fed back to a means involved in a roll apparatus for controlling the flatness of a strip known to those skilled in the art which is formed of a screwdown control device, crown control device and etc.
  • the longitudinal direction of the strip 1 is designated as an x axis, the direction thereof perpendicular to said longitudinal direction and extending toward the vibration means 8 as a y axis and the point at which the x and y axes intersect each other as the base point 0.
  • the standing wave 10 having a maximum amplitude A may be approximately expressed by equation I below.
  • the degree e of elongation is determined at a plurality of points located in the transverse direction of a metal strip, and a load to be applied to a means for controlling the flatness of the surface of the metal strip, for example, a pair of crown rolls, are adjusted in accordance with the distribution pattern of the determined degrees of elongation at said points thereby to cause said rolls to be curved in a desired manner, then it will be possible to control the shape or flatness of the rolled metal strip.
  • the amplitude A of the standing wave can be detected, for example, optically.
  • the travelling direction of a metal strip 1 is designated as an x axis, the direction of its thickness as a y axis, its transverse direction as z axis and the point at which the three axes intersect each other as the base point 0.
  • the standing wave cut by the x -y plane is indicated by the aforementioned equation l.
  • the distance d is determined as a difference in the amounts oflight beams detected by a pair of photoelectric detectors S and 8 divided by the y-z plane with x taken as equal to X, then the amplitude A of the related standing wave can be easily defined from equation lV above.
  • the standing wave may be generated, as illustrated in FIG. 6, by arranging two rolls to and 16 acting as guide rolls at an interval of L instead of using the aforementioned keep rolls 6 and 7. Further the work rolls 2 may be substituted for-one of said rolls l6 and 116'. lt will also be apparent that means for generating the standing wave and means for determining the amplitude thereof are not limited to those used in the aforementioned embodiments.
  • An apparatus for determining the degree of elongation of metal strips before they are wound about a takeup device after they are rolled by work rolls which comprises means for forcibly applying between the work rolls and takeup device vibrations having a prescribed frequency to a travelling metal strip in the direction of its thickness, means for limiting the scope of vibrations generated by said vibration means to the prescribed portion of the metal strip in its longitudinal direction, so as to cause vibrations substantially to display a standing wave having a prescribed wavelength, means for determining the amplitude of the standing wave vibrations in the metal strip, and means for computing the degree of elongation of the metal strip upon receipt of signals representing said amplitude issued from the amplitude determining means.
  • the means for forcibly applying vibrations consists of a pair of ejecting devices disposed on the opposite sides of the metal strip in a manner to face each other and so designed as to eject fluid by turns to the metal strip.
  • An apparatus wherein the means for forcibly applying vibrations consists of a pair of electromagnetic devices positioned on the opposite sides of the metal strip in a manner to face each other and so designed as to apply an electromagnetic force to the metal strip.
  • said amplitude determining means comprises a plurality of detectors in the transverse direction of the strip.
  • said amplitude determining means consists of a light source to project light beams to the strip and a pair of photoelectric converters arranged to receive the light beams reflected from said strip to generate an electrical signal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
US840810A 1968-07-12 1969-07-10 Apparatus for method for determining the degree of elongation of metal strips Expired - Lifetime US3592051A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP43048458A JPS4837102B1 (enExample) 1968-07-12 1968-07-12

Publications (1)

Publication Number Publication Date
US3592051A true US3592051A (en) 1971-07-13

Family

ID=12803901

Family Applications (1)

Application Number Title Priority Date Filing Date
US840810A Expired - Lifetime US3592051A (en) 1968-07-12 1969-07-10 Apparatus for method for determining the degree of elongation of metal strips

Country Status (6)

Country Link
US (1) US3592051A (enExample)
JP (1) JPS4837102B1 (enExample)
DE (1) DE1935755A1 (enExample)
FR (1) FR2012824A1 (enExample)
GB (1) GB1263605A (enExample)
SE (1) SE357616B (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5467655A (en) * 1991-03-27 1995-11-21 Nippon Steel Corporation Method for measuring properties of cold rolled thin steel sheet and apparatus therefor
US6359553B1 (en) 1998-06-26 2002-03-19 Volkswagen Ag Method and control arrangement for minimizing consequences of accidents
DE10257639A1 (de) * 2002-12-10 2004-07-08 Siemens Ag Verfahren und Vorrichtung zur Planheitsermittlung in einem Metallband unter zug
EP3626840A1 (de) * 2018-09-18 2020-03-25 Primetals Technologies Germany GmbH Behandlung von heissem walzgut aus metall
DE102023000500A1 (de) 2023-02-15 2024-08-22 Thomas Folke Berührungsloses Messgerät zum Messen der Bandspannung einer Mehrzahl von Bandstreifen in einer Längsteilanlage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5271901U (enExample) * 1975-11-21 1977-05-28
JPS5293302U (enExample) * 1976-01-09 1977-07-12

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1948104A (en) * 1929-10-24 1934-02-20 Floyd A Firestone Vibration responsive apparatus
US2278510A (en) * 1939-07-26 1942-04-07 Westinghouse Electric & Mfg Co Sensitive device for measuring linear density of wire
US2618970A (en) * 1948-09-11 1952-11-25 Morgan Construction Co Determination of stresses in longitudinally traveling bodies
US3513690A (en) * 1967-08-18 1970-05-26 Univ Washington Method and apparatus for non-destructive testing of beams

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1948104A (en) * 1929-10-24 1934-02-20 Floyd A Firestone Vibration responsive apparatus
US2278510A (en) * 1939-07-26 1942-04-07 Westinghouse Electric & Mfg Co Sensitive device for measuring linear density of wire
US2618970A (en) * 1948-09-11 1952-11-25 Morgan Construction Co Determination of stresses in longitudinally traveling bodies
US3513690A (en) * 1967-08-18 1970-05-26 Univ Washington Method and apparatus for non-destructive testing of beams

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5467655A (en) * 1991-03-27 1995-11-21 Nippon Steel Corporation Method for measuring properties of cold rolled thin steel sheet and apparatus therefor
US6359553B1 (en) 1998-06-26 2002-03-19 Volkswagen Ag Method and control arrangement for minimizing consequences of accidents
DE10257639A1 (de) * 2002-12-10 2004-07-08 Siemens Ag Verfahren und Vorrichtung zur Planheitsermittlung in einem Metallband unter zug
EP3626840A1 (de) * 2018-09-18 2020-03-25 Primetals Technologies Germany GmbH Behandlung von heissem walzgut aus metall
WO2020057824A1 (de) * 2018-09-18 2020-03-26 Primetals Technologies Germany Gmbh Behandlung von heissem walzgut aus metall
US11273476B2 (en) 2018-09-18 2022-03-15 Primetals Technologies Germany Gmbh Treatment of hot rolling stock made of metal
RU2766923C1 (ru) * 2018-09-18 2022-03-16 Прайметалз Текнолоджиз Джермани Гмбх Обработка горячего проката из металла
US11779971B2 (en) 2018-09-18 2023-10-10 Primetals Technologies Germany Gmbh Treatment of hot rolling stock made of metal
DE102023000500A1 (de) 2023-02-15 2024-08-22 Thomas Folke Berührungsloses Messgerät zum Messen der Bandspannung einer Mehrzahl von Bandstreifen in einer Längsteilanlage

Also Published As

Publication number Publication date
GB1263605A (en) 1972-02-16
FR2012824A1 (enExample) 1970-03-27
SE357616B (enExample) 1973-07-02
DE1935755A1 (de) 1970-01-15
JPS4837102B1 (enExample) 1973-11-09

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