EP0315694A1 - Verfahren und vorrichtung zum warmwalzen von band - Google Patents

Verfahren und vorrichtung zum warmwalzen von band Download PDF

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Publication number
EP0315694A1
EP0315694A1 EP88904627A EP88904627A EP0315694A1 EP 0315694 A1 EP0315694 A1 EP 0315694A1 EP 88904627 A EP88904627 A EP 88904627A EP 88904627 A EP88904627 A EP 88904627A EP 0315694 A1 EP0315694 A1 EP 0315694A1
Authority
EP
European Patent Office
Prior art keywords
heating
roll
rolls
rolling
roll bodies
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.)
Withdrawn
Application number
EP88904627A
Other languages
English (en)
French (fr)
Other versions
EP0315694A4 (de
Inventor
Sadakazu Nippon Kokan K.K.-Nai Masuda
Fumio Nippon Kokan Kabushiki Kaisha-Nai Fujita
Tadayoshi Nippon Kokan K.K.-Nai Murakami
Masahiko Nippon Kohan K.K.-Nai Yoshino
Ryuichi Nippon Kokan Kabushiki Kaisha-Nai Yagi
Masamoto Nippon Kokan K.K.-Nai Kamata
Shunpei Nippon Kokan K.K.-Nai Kobayashi
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
Priority claimed from JP12709787A external-priority patent/JPS63295003A/ja
Priority claimed from JP7807087U external-priority patent/JPS63189401U/ja
Application filed by Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Publication of EP0315694A1 publication Critical patent/EP0315694A1/de
Publication of EP0315694A4 publication Critical patent/EP0315694A4/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B27/106—Heating the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel

Definitions

  • the present invention relates to a warm rolling method of brittle steel bands such as high Si steels, and a facility therefor suitable to practising the method.
  • Brittle materials such as high Si steel are known in difficulties of processings, e.g., rolling, but those materials may be subjected to rolling by increasing temperature.
  • the temperature of the roll should be necessarily high to a certain extent, otherwise the heat of the steel band would transfer to the roll and the steel band could not be performed with proper processing. Therefore, the roll must be preheated for entering the rolling of the steel band.
  • the present invention has been developed in view of problems involved with the prior art, and it is an object of the invention to provide a method of preventing the heat crown caused in the roll and carry out the warming roll without causing breakage of the brittle steel band.
  • the inventive method heats both ends of roll bodies, including vicinities of the parts in length thereof, to which the edges of the steel band contact, in order to control heat crowns caused in the rolls under operation.
  • the thermal expansion may be uniformalized in the working part of the roll, and the steel band may be exactly prevented from elongation at its center.
  • the both sides of the roll is directly heated by means of burners or other heating instrument or indirectly heated via such as back-up rolls.
  • the inventive rolling facility has a heating apparatus which may change heating ranges in the length of the roll body, and a plurality of temperature sensors provided along the length of the roll body, in order to change the heating ranges of the heating apparatus in accordance with temperature informations issued from the temperature sensors.
  • the temperature on the roll surface is measured by the temperature sensors, and in accordance with the tempertaure information therefrom, the heating range, i.e., the heating widthes at the both ends of the rolls are controlled by an on-off control of each of heating elements composing the heating apparatus.
  • the roll is preheated by heating the full length of the roll body.
  • the heating burners or other suitable means may be employed.
  • Figs.l and 2 show one embodiment of the invention, where the rolls are directly heated by means of burners.
  • numerals la,lb are upper and lower rolls
  • 2 is back-up rolls
  • 3 is a burner
  • 4 is stands
  • 5 is a thermometer (contact type) for measuring temperatures of the roll
  • (S) is a steel band.
  • the burner 3 is disposed against the rolls la,lb such that the both sides of the roll body may be heated, and has a plurality of burner portions (burner nozzles) along the length of the roll body such that the flames may be changed in width at the both sides of the roll body.
  • the burner 3 directly heats the both sides of the roll bodies, including the vicinities of parts thereof to which the edge parts of the steel band (S) contact, so as to control the heat crown thereat.
  • thermometer 5 measures the temperature in the length of the roll body, so that the heating width is controlled by the on-off control of the heating elements of the burner.
  • the heat expansion is made uniform in the working part of the roll so that the steel band may be prevented from elongation at its center.
  • the both sides of the roll body may be directly heated by the burners or other heating instruments, or may be indirectly heated via the back-up rolls.
  • Fig.3 is a graph showing influences of the heating widthes to an amount of heat crown in the warm rolling by the facility as seen in Fig.l, and it is seen that the crown may be controlled by the heating width, and especially if the heating width is broadened gradually as time passes, 4H can be checked exactly.
  • Fig.4 is a graph showing changes as time passes, of the heat crown amounts ⁇ H (refer to Fig.3) during rolling in the inventive and the comparative examples.
  • the comparative example did not heat the rolls, and a large crown was caused as the rolling progressed, while the invention checked the heat crown to the small amount.
  • the invention could roll the steel band in thickness from 2.0 mm to 0.5 mm without causing breakages at the edge portions.
  • the comparative example generated breakages at the edge portions of the steel strip at beginning of rolling if the rolls were not preheated. Further, if the vicinities of the edge portions of the strip were not heated for rolling, the large elongation was generated at the center of the steel band, and the steel band was broken at last.
  • the desired rolling could be performed if the rolls were maintained at the temperature between 200°C and 250°C
  • another example was carried out under a condition that the temperature was not below the above mentioned temperature, in that the heat crown was prevented by forcibly air-cooling the working parts of the rolls generating large heat expansion.
  • the heat crown could be controlled satisfactorily until the strip was rolled to a desired thickness without causing extreme increasing of the temperature in the rolls.
  • the rolling facility of the invention will be referred to.
  • Figs.5 and 6 show one embodiment of the present facility.
  • Numerals 1a,1b are upper and lower rolls
  • 2 is back-up rolls
  • 3 is a burner
  • 4 is stands
  • 5 is a thermometer
  • 6 is a heat control apparatus
  • 7 is a valve operating device.
  • the burner 3 is disposed against the rolls la,lb, and has a plurality of burner portions 31 (burner nozzles) along the length of the roll body such that the flames may be changed in width at the both sides of the roll body by the on-off of the burner portions 31.
  • Gas supply pipes 8 to burner portions 31 of the burner 3 are provided with valves 9 which are operated by the valve operating device 7.
  • the temperature sensors 5 are provided with spaces along the length of the roll body.
  • the temperature information from the temperature sensor 5 is sent to the heat control apparatus 6, and in accordance with the temperature information, the heating range of the burner 3 is controlled. Actually, the on-off control is made to each of the burner portions 31 by operating the valve.
  • the numeral 10 designates the air nozzles disposed against the center parts of the roll bodies, and each of them is supplied with the air from an air pipe 11.
  • the rolls are preheated over almost the full lengthes of the rolls la,lb by means of all the heating burners disposed along the length of the roll body. Further, during rolling the brittle steel band (S), the burner 3 heats only the both sides of the roll including the vicinity of its part to which the edges of the steel band (S) contact, during which the temperature sensors 5 measure the temperature on the roll surface in the length of the roll body. The heating position and width of the roll are adjusted by the on-off control of each of the burner portions 31 such that the thermal expansion is made uniform in the working part of the roll in accordance with the temperature information.
  • the both sides of the roll bodies are heated by the burners as mentioned above, while the center parts of the roll bodies are forcibly cooled with the air supplied from the air nozzles 10, whereby the heat crown is positively prevented.
  • the method and facility of the invention may be applied to the rolling of the brittle steel bands such as high Si steels.
EP19880904627 1987-05-26 1988-05-23 Verfahren und vorrichtung zum warmwalzen von band. Withdrawn EP0315694A4 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP78070/87U 1987-05-26
JP12709787A JPS63295003A (ja) 1987-05-26 1987-05-26 脆性鋼帯の温間圧延方法
JP127097/87 1987-05-26
JP7807087U JPS63189401U (de) 1987-05-26 1987-05-26

Publications (2)

Publication Number Publication Date
EP0315694A1 true EP0315694A1 (de) 1989-05-17
EP0315694A4 EP0315694A4 (de) 1989-10-04

Family

ID=26419143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880904627 Withdrawn EP0315694A4 (de) 1987-05-26 1988-05-23 Verfahren und vorrichtung zum warmwalzen von band.

Country Status (3)

Country Link
EP (1) EP0315694A4 (de)
KR (1) KR890701234A (de)
WO (1) WO1988009229A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000000307A1 (de) * 1998-06-26 2000-01-06 Sms Demag Ag Verfahren und vorrichtung zum walzen von warmbändern

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1978894A (en) * 1930-06-20 1934-10-30 Walter R Clark Rolling mill
FR1339417A (fr) * 1962-11-23 1963-10-04 Procédé pour l'amélioration et la régulation des conditions de laminage des produits plats ainsi que les dispositifs pour la mise en oeuvre de ce procédé ou procédé similaire
US3213655A (en) * 1962-12-03 1965-10-26 Westinghouse Electric Corp Workpiece shape control apparatus
US3616669A (en) * 1969-06-13 1971-11-02 United Eng Foundry Co Method of and apparatus for rolling flat strip
JPS5581010A (en) * 1978-12-12 1980-06-18 Kobe Steel Ltd Plate shape control method of plate rolling
JPS58128208A (ja) * 1982-01-28 1983-07-30 Nippon Steel Corp 冷間圧延機のロ−ル冷却水供給方法及び装置
JPS59212107A (ja) * 1983-05-18 1984-12-01 Ishikawajima Harima Heavy Ind Co Ltd ロ−ルの温度制御装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180611A (ja) * 1984-02-29 1985-09-14 Kobe Steel Ltd 圧延機におけるロ−ルク−ラント制御方法
JPS60238012A (ja) * 1984-05-10 1985-11-26 Mitsubishi Electric Corp 圧延機の形状制御方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1978894A (en) * 1930-06-20 1934-10-30 Walter R Clark Rolling mill
FR1339417A (fr) * 1962-11-23 1963-10-04 Procédé pour l'amélioration et la régulation des conditions de laminage des produits plats ainsi que les dispositifs pour la mise en oeuvre de ce procédé ou procédé similaire
US3213655A (en) * 1962-12-03 1965-10-26 Westinghouse Electric Corp Workpiece shape control apparatus
US3616669A (en) * 1969-06-13 1971-11-02 United Eng Foundry Co Method of and apparatus for rolling flat strip
JPS5581010A (en) * 1978-12-12 1980-06-18 Kobe Steel Ltd Plate shape control method of plate rolling
JPS58128208A (ja) * 1982-01-28 1983-07-30 Nippon Steel Corp 冷間圧延機のロ−ル冷却水供給方法及び装置
JPS59212107A (ja) * 1983-05-18 1984-12-01 Ishikawajima Harima Heavy Ind Co Ltd ロ−ルの温度制御装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 4, no. 123 (M-29)[605], 30th August 1980; & JP-A-55 81 010 (KOBE SEIKOSHO K.K.) 18-06-1980 *
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 240 (M-251)[1385], 25th October 1983; & JP-A-58 128 208 (SHIN NIPPON SEITETSU K.K.) 30-07-1983 *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 84 (M-371)[1807], 13th April 1985; & JP-A-59 212 107 (ISHIKAWAJIMA HARIMA JUKOGYO K.K.) 01-12-1984 *
See also references of WO8809229A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000000307A1 (de) * 1998-06-26 2000-01-06 Sms Demag Ag Verfahren und vorrichtung zum walzen von warmbändern

Also Published As

Publication number Publication date
EP0315694A4 (de) 1989-10-04
WO1988009229A1 (en) 1988-12-01
KR890701234A (ko) 1989-12-19

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