US3491562A - System and apparatus for effecting a correction of deflection of strip steel from its normal path of travel in a tandem rolling mill - Google Patents

System and apparatus for effecting a correction of deflection of strip steel from its normal path of travel in a tandem rolling mill Download PDF

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Publication number
US3491562A
US3491562A US674235A US3491562DA US3491562A US 3491562 A US3491562 A US 3491562A US 674235 A US674235 A US 674235A US 3491562D A US3491562D A US 3491562DA US 3491562 A US3491562 A US 3491562A
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Prior art keywords
deflection
strip
travel
correction
mill
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Expired - Lifetime
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US674235A
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English (en)
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Toshiyuki Kajiwara
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Hitachi Ltd
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Hitachi Ltd
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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
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering

Definitions

  • This invention relates to a system and an apparatus for effecting a correction of deflection of a strip in a tandem rolling mill, particularly in a cold strip mill, whereby deflection of the leading top portion of a strip from its normal path of travel can automatically be corrected.
  • the top portion of strip in many cases does not travel in a straight line to be aligned with the center of roll path of the each succeeding mill stand but tends to be deviated from its straight or normal path of travel. Conseqeuntly, the top of strip impinges on a side guide and the strip is prevented from entering between the Work rolls of the succeeding mill stand.
  • the present invention has as its object the provision of a system and an apparatus for completely effecting a correction of deflection of strip from its normal path of travel.
  • FIG. 1 is an explanatory view showing the manner in which a strip is deflected from its normal path of travel in a tandem rolling mill;
  • FIG. 2 is a schematic view showing essential portions of a tandem rolling mill incorporating a system for correcting deflection of strip from its normal path of travel according to the invention.
  • FIG. 3 is a view to explain the manner in which a strip travels in a tandem rolling mill incorporating the system according to the present invention.
  • Deflection of a strip from its normal path of travel in a tandem rolling mill can be caused by various factors such as lack of parallelism between upper and lower work rolls defining a roll gap therebetween, deviation of the strip in the roll path with respect to the center of roll Width, irregular thickness distribution of strip in the transverse direction and the like. Of these factors, the lack of parallelism between upper and lower work rolls and the deviation of the strip in the roll path with respect to the center of roll width have been responsible in the majority of cases for deflection of the strip from its normal path of travel.
  • the strip After being rolled, the strip tends to be deflected about its top portion at a certain rate of curvature toward the side of the roll path on which the screw down rate is lower or in the direction in which the center of strip width is deviated in the roll path with respect to the center of roll width.
  • This phenomenon will be explained in detail with reference to FIG. 1. Assuming that the roll gap between work rolls 1, 1 is smaller on the A side than on the B side that is; the screw down rate is higher on the A side than on the B side, the portion of the strip on the A side is stretched a greater amount than the portion on the B side, causing the top portion of strip to be curved as shown at a.
  • deflection detection means 5, 5' may be provided which detects an amount of deflection 6 and produces a signal in accordance with the amount detected.
  • the present invention can obviate the problem of deflection of the top of a strip from its normal path of travel encountered during threading in tandem rolling mills.
  • the invention is characterized by the provision of deflection detection means at the outlet of each mill stand, which is adapted to give an instruction signal to deflection correction means of the particular mill stand concerned and at the same time give a necessary instruction signal to deflection correction means of the succeeding mill stand.
  • the tandem rolling mill shown in the drawings is illustrated as having only two mill stands. However, such rolling mill generally has four to six mill stands, and it is to be understood that the rest of the stands are omitted.
  • a first mill stand includes work rolls 1, 1 and back-up rolls 3, 3, and a second mill stand includes work rolls 2, 2', and back-up rolls 4, 4'.
  • Deflection detection means 5, 5 are disposed rearwardly of the first mill stand, while deflection detection means 6, 6 are disposed rearwardly of the second mill stand.
  • 7 is a strip to be rolled.
  • the back-up rolls of the first and second mill stands are provided with bearing boxes 8 and 9, respectively.
  • Screw down electric motors 12, 12 are disposed on the A side and on the B side respectively of the first rolling stand, while screw down electric motors 13, 13' are mounted similarly on the A side and on the B side, respectively, of the second rolling stand.
  • the deflection detection means 5 is provided with a transducer 14 which provides detected signals to control means 16, 17 for generating instruction signals. According to the instruction signals, respective screw down motors 12, 12' and 13, 13' of the first and second mill stands are capable of adjusting amounts of screw down of the work rolls 1, 1 and 2, 2. on the A side or the B side or both sides so as to steer the strip, that is; to correct deflection of the strip from its normal path of travel.
  • the deflection detection means 5 may comprise a pair of position detectors disposed on the opposite sides of the predetermined straight line path as shown in the drawings. Position detectors may be those detecting a change in electromagnetic fields, a change in light beams or a change in X-ray beams.
  • the deflection detection means 6 is provided with a transducer which is operatively connected to the screw down motors 13, 13' of the second mill stand through control means 18 as well as screw down motors of the next following rolling stand (not shown) through control means 19.
  • the deflection detection means 5 will detect the deviation and provide a signal through the transducer 14 corresponding to the amount of deflection to control means 16 which produces instruction signals to the screw down motors 12, 12'.
  • the instruction signal controls the motors so as to adjust the screw down rate of the work rolls 1 throu h the back-up rolls 3, 3' in such a manner that the roll gap therebetween is increased on the A side and reduced on the B side.
  • a signal will be also issued to the screw down motors 13, 13 of the second mill stand through control means 17, which similarly adjust the roll gap between the work rolls 2, 2' through the back-up rolls 4, 4' in such a manner that the screw down rate of work rolls 2 is made higher on the B side than on the A side.
  • This causes the top of strip 7 to be stretched a larger amount on the B side than on the A side so that the top of strip comes out from the rolls 2 in the manner as shown at 1. Then the top will successively proceed in its path of travel in the manner shown at g and h.
  • the top of strip 7 After passing through the phase h, the top of strip 7 would be deviated to the opposite side as shown in imaginary lines j if it were left to follow its own course, since the stretching of strip 7 has by then grown larger on the B side than on the A side.
  • deflection of strip 7 in the opposite direction has by then been detected by the deflection detection means 6 so that the top of strip does not proceed in the manner as shown at j but travels straight as shown at i since adjustment of roll gap between the work rolls 2 are effected by actuation of the deflection detection means 6. If the strip were deflected from its normal roll path between the rolls 2, a correction of the deflection could be effected in the same manner in cooperation with the succeeding mill stand.
  • the present invention makes it possible to aut matically steer a strip at the threading, that is, to automatically effect a correction of deflection of the top of a simple device, thereby permitting to effect full automatic strip threading operations in a tandem rolling mill.
  • a system for effecting a correction of deflection of a strip from its normal path of travel in a trandem rolling mill characterized in that deflection detection means provided at the outlet of each mill stand gives an instruction signal to deflection correction means of the particular mill stand concerned and at the same time also gives a necessary instruction signal to deflection correction means of the succeeding mill stand to automatically effect a correction of deflection of strip steel from its normal path of travel whereby deflection of the top of the strip fed to a tandem rolling mill can automatically be corrected.
  • a system for effecting a correction of deflection of strip steel from its normal path of travel in a rolling mill as claimed in claim 1 in which said instruction signal 1s transmitted through a transducer mounted in said deflection detection means to said deflection correction means including screw down electric motors so as to adjust the roll gap between upper and lower work rolls for effecting a correction of deflection of the strip from its normal path of travel.
  • An apparatus for steering a strip at threading operation in a tandem rolling mill including at least first and second mill stands each having screw down mechanism to adjust the roll gap thereof wherein the improvement comprises deflection detecting means provided at the outlet of the first mill stand for providing a detected deflection signal according to a deflection of the strip from the predetermined path thereof and control means operatively coupled with the deflection detecting means and the respective screw down mechanisms of the first and second mill stands for providing necessary screw down instruction signals to the first and second mill stands according to the detected deflection signal so as to steer the strip.
  • said deflection detecting means comprises a pair of detectors disposed on the opposite sides of the predetermined path of the strip so as to produce a detected signal corresponding to the deflection of the strip from the predetermined path.
  • control means comprises first and second control means operatively connected to the screw down mechanisms of the first and second mill stands, respectively, for providing most pertinent instruction signals to the first and second mill stands, respectively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
US674235A 1966-10-12 1967-10-10 System and apparatus for effecting a correction of deflection of strip steel from its normal path of travel in a tandem rolling mill Expired - Lifetime US3491562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6661166A JPS458780B1 (enrdf_load_stackoverflow) 1966-10-12 1966-10-12

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US3491562A true US3491562A (en) 1970-01-27

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2111213A1 (de) * 1970-03-11 1971-09-30 Zumbach Electronic Automatic Verfahren und Einrichtung zur beruehrungslosen Messung einer Schichtdicke
US3782155A (en) * 1971-03-30 1974-01-01 Siemag Siegener Masch Bau Process and mechanism for the operating of a rolling mill
US4188025A (en) * 1978-02-23 1980-02-12 Eastman Kodak Company Offset sheet stacking apparatus
DE2952461A1 (de) * 1978-12-27 1980-07-10 Hitachi Ltd Verfahren und vorrichtung zum steuern von walzgeruesten
FR2544231A1 (fr) * 1983-04-13 1984-10-19 Ishikawajima Harima Heavy Ind Procede et appareillage pour le controle du mouvement lateral d'une bande laminee
FR2544232A1 (fr) * 1983-04-12 1984-10-19 Ishikawajima Harima Heavy Ind Procede et appareil pour le controle du mouvement d'instabilite lateral d'une bande laminee
US4530226A (en) * 1983-06-13 1985-07-23 Tishken Products, Inc. Sweep-forming apparatus
US4773245A (en) * 1986-04-08 1988-09-27 Davy Mckee (Sheffield) Limited Strip guiding apparatus for downcoilers
US4884425A (en) * 1986-06-20 1989-12-05 Mainiero John W Roll forming apparatus for forming barbed tape into a coded configuration
DE3818409A1 (de) * 1988-05-31 1989-12-07 Krantz H Gmbh & Co Zugwalze
US4920775A (en) * 1986-06-20 1990-05-01 Mrm Security Systems, Inc. Apparatus for making barbed tape
DE3933260A1 (de) * 1989-02-04 1990-10-11 Lothar Kehne Walze, insbesondere fuer walzwerke und huettenbetriebe
EP0603598A1 (de) * 1992-12-23 1994-06-29 Thyssen Stahl Aktiengesellschaft Verfahren zum Herstellen eines Stahlbandes durch Giessen eines Stranges und anschliessendes Walzen
US5629030A (en) * 1995-03-18 1997-05-13 Roehm Gmbh Chemische Fabrik Extrusion device having position control
US20030014163A1 (en) * 2000-02-07 2003-01-16 Ziegelaar John Albert Rolling strip material
CN104150161A (zh) * 2014-08-22 2014-11-19 中冶南方工程技术有限公司 立式夹送纠偏装置
CN105903771A (zh) * 2016-05-18 2016-08-31 华峰日轻铝业股份有限公司 一种自动测控热轧机跑偏量的装置及其测控方法
CN106734237A (zh) * 2016-12-23 2017-05-31 深圳市浩能科技有限公司 一种轧制生产线的纠偏方法及系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006024761A1 (de) 2006-05-27 2007-11-29 Sms Demag Ag Vorrichtung zum Messen der Breite und/oder der Bandlage eines Metallbandes oder einer Bramme
WO2021005777A1 (ja) * 2019-07-11 2021-01-14 Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 圧延装置の運転方法並びに圧延装置の制御装置及び圧延設備
JP7150994B2 (ja) * 2019-07-11 2022-10-11 Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 圧延装置の制御装置及び圧延設備並びに圧延装置の運転方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292535A (en) * 1938-08-19 1942-08-11 Acme Steel Co Strip rolling apparatus
US3049944A (en) * 1959-10-05 1962-08-21 Bendix Corp Semi-automatic two-speed hub gearing for velocipedes
US3104566A (en) * 1958-10-16 1963-09-24 Square D Co Rolling mill control
US3204441A (en) * 1960-07-29 1965-09-07 Blaw Knox Co Automatic strip threading devices
US3225577A (en) * 1964-04-01 1965-12-28 Fox Ind Inc Rolling mill guides
US3245241A (en) * 1963-07-22 1966-04-12 United States Steel Corp Method and apparatus for maintaining uniform tensile stress in strip

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292535A (en) * 1938-08-19 1942-08-11 Acme Steel Co Strip rolling apparatus
US3104566A (en) * 1958-10-16 1963-09-24 Square D Co Rolling mill control
US3049944A (en) * 1959-10-05 1962-08-21 Bendix Corp Semi-automatic two-speed hub gearing for velocipedes
US3204441A (en) * 1960-07-29 1965-09-07 Blaw Knox Co Automatic strip threading devices
US3245241A (en) * 1963-07-22 1966-04-12 United States Steel Corp Method and apparatus for maintaining uniform tensile stress in strip
US3225577A (en) * 1964-04-01 1965-12-28 Fox Ind Inc Rolling mill guides

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2111213A1 (de) * 1970-03-11 1971-09-30 Zumbach Electronic Automatic Verfahren und Einrichtung zur beruehrungslosen Messung einer Schichtdicke
US3782155A (en) * 1971-03-30 1974-01-01 Siemag Siegener Masch Bau Process and mechanism for the operating of a rolling mill
US4188025A (en) * 1978-02-23 1980-02-12 Eastman Kodak Company Offset sheet stacking apparatus
DE2952461A1 (de) * 1978-12-27 1980-07-10 Hitachi Ltd Verfahren und vorrichtung zum steuern von walzgeruesten
US4700312A (en) * 1978-12-27 1987-10-13 Hitachi, Ltd. Method and apparatus for controlling snake motion in rolling mills
FR2544232A1 (fr) * 1983-04-12 1984-10-19 Ishikawajima Harima Heavy Ind Procede et appareil pour le controle du mouvement d'instabilite lateral d'une bande laminee
DE3413269A1 (de) * 1983-04-12 1984-10-25 Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo Verfahren und vorrichtung zur steuerung der seitlichen unstabilen bewegung und der kruemmung eines einem walzvorgang unterliegenden bandes
US4570472A (en) * 1983-04-12 1986-02-18 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Method and apparatus for controlling lateral unstable movement and camber of strip being rolled
FR2544231A1 (fr) * 1983-04-13 1984-10-19 Ishikawajima Harima Heavy Ind Procede et appareillage pour le controle du mouvement lateral d'une bande laminee
DE3413424A1 (de) * 1983-04-13 1984-10-25 Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo Verfahren und vorrichtung zur steuerung der seitlichen unstabilen bewegung eines einem walzvorgang unterliegenden bandes
US4530226A (en) * 1983-06-13 1985-07-23 Tishken Products, Inc. Sweep-forming apparatus
US4773245A (en) * 1986-04-08 1988-09-27 Davy Mckee (Sheffield) Limited Strip guiding apparatus for downcoilers
US4884425A (en) * 1986-06-20 1989-12-05 Mainiero John W Roll forming apparatus for forming barbed tape into a coded configuration
US4920775A (en) * 1986-06-20 1990-05-01 Mrm Security Systems, Inc. Apparatus for making barbed tape
DE3818409A1 (de) * 1988-05-31 1989-12-07 Krantz H Gmbh & Co Zugwalze
DE3933260A1 (de) * 1989-02-04 1990-10-11 Lothar Kehne Walze, insbesondere fuer walzwerke und huettenbetriebe
EP0603598A1 (de) * 1992-12-23 1994-06-29 Thyssen Stahl Aktiengesellschaft Verfahren zum Herstellen eines Stahlbandes durch Giessen eines Stranges und anschliessendes Walzen
DE4243857C1 (de) * 1992-12-23 1994-07-28 Thyssen Stahl Ag Verfahren zum Herstellen eines Stahlbandes durch Gießen eines Stranges und anschließendes Walzen
US5479982A (en) * 1992-12-23 1996-01-02 Thyssen Stahl Aktiengesellschaft Method for the production of a steel strip by the casting of a strand followed by rolling
US5629030A (en) * 1995-03-18 1997-05-13 Roehm Gmbh Chemische Fabrik Extrusion device having position control
US20030014163A1 (en) * 2000-02-07 2003-01-16 Ziegelaar John Albert Rolling strip material
US6766934B2 (en) * 2000-02-07 2004-07-27 Castrip, Llc Method and apparatus for steering strip material
CN104150161A (zh) * 2014-08-22 2014-11-19 中冶南方工程技术有限公司 立式夹送纠偏装置
CN104150161B (zh) * 2014-08-22 2016-06-01 中冶南方工程技术有限公司 立式夹送纠偏装置
CN105903771A (zh) * 2016-05-18 2016-08-31 华峰日轻铝业股份有限公司 一种自动测控热轧机跑偏量的装置及其测控方法
CN106734237A (zh) * 2016-12-23 2017-05-31 深圳市浩能科技有限公司 一种轧制生产线的纠偏方法及系统

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Publication number Publication date
JPS458780B1 (enrdf_load_stackoverflow) 1970-03-30

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