GB1419814A - Constant speed driven continuous rolling mill - Google Patents

Constant speed driven continuous rolling mill

Info

Publication number
GB1419814A
GB1419814A GB3077573A GB3077573A GB1419814A GB 1419814 A GB1419814 A GB 1419814A GB 3077573 A GB3077573 A GB 3077573A GB 3077573 A GB3077573 A GB 3077573A GB 1419814 A GB1419814 A GB 1419814A
Authority
GB
United Kingdom
Prior art keywords
stand
measured
control
power
gap
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
Application number
GB3077573A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1419814A publication Critical patent/GB1419814A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21B37/46—Roll speed or drive motor control

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Control Of Velocity Or Acceleration (AREA)

Abstract

1419814 Automatic control of rolling mills GENERAL ELECTRIC CO 28 June 1973 [28 June 1972] 30775/73 Heading G3R In a multi-stand rolling mill, the roll gap of a stand is adjusted according to the deviation from a desired value of the measured power to a drive motor of the preceding stand. As shown, the power to a drive motor e.g. DM3 for stand R3 is measured as the slab SL passes through stand R3 only, and as it is threaded through stands R3 and R4. Any difference in power controls the screwdowns SD4 of stand R4, after a delay, to reduce the difference, and thus the interstand tension or compression, to an acceptable level. The power to motor drive DM4 of stand 5 is similarly controlled by gap adjustment of stand R5. The roll force in stand R3 is measured by load cell LC3 and compared with a predicted value, any error also being used to control the screwdowns of stand R4, with similar control of the roll-gap of stand R5 by the measured roll force in stand R4. The time of travel of the slab between roughing stand R2 and stand R3 is measured by thermal sensors T1, T2 to vary the pre-set gap of stand R3 and the gain of screwdown control circuits 61, 62 of stands R4, R5, thus compensating for changes in slab temperature due to differing threading times. The stand motors DM3 to DM5 are constant speed motors, and the screwdown drives may be SCRs. In an alternative Fig. 2 (not shown) the control of the stands may be by a digital computer using the above measured parameters and given equations.
GB3077573A 1972-06-28 1973-06-28 Constant speed driven continuous rolling mill Expired GB1419814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26689572A 1972-06-28 1972-06-28

Publications (1)

Publication Number Publication Date
GB1419814A true GB1419814A (en) 1975-12-31

Family

ID=23016423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3077573A Expired GB1419814A (en) 1972-06-28 1973-06-28 Constant speed driven continuous rolling mill

Country Status (7)

Country Link
US (1) US3762194A (en)
JP (1) JPS4956865A (en)
BR (1) BR7304500D0 (en)
DE (1) DE2332570A1 (en)
FR (1) FR2190537B3 (en)
GB (1) GB1419814A (en)
IT (1) IT989426B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399883A1 (en) * 1977-08-08 1979-03-09 Siderurgie Fse Inst Rech PROCESS FOR PRESETTING A CONTINUOUS TRAIN WITH TANDEM CAGES FOR HOT ROLLED METAL PRODUCTS
DE2815341A1 (en) * 1978-04-10 1979-10-18 Bbc Brown Boveri & Cie PROCEDURE AND CIRCUIT ARRANGEMENT FOR REGULATING THE LONGITUDINAL FORCE BETWEEN ROLLING STANDS OF A CONTINUOUS ROLLING MILL WITH INDIVIDUAL DRIVES
DE3302222C1 (en) * 1983-01-24 1984-05-10 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for a roller drive motor of a tube mill
US4633694A (en) * 1985-02-13 1987-01-06 Kazuo Miyazaki Automatic control on strip continuous processing lines
JPS623820A (en) * 1985-02-25 1987-01-09 Nippon Steel Corp Continuous rolling equipment for steel sheet
US4662202A (en) * 1985-07-23 1987-05-05 Cargill, Incorporated Low tension cascade mill speed control by current measurement with temperature compensation
WO1993001900A1 (en) * 1991-07-24 1993-02-04 Nakata Manufacturing Co., Ltd. Method of determining the optimum ratio for the number of roll rotation in a cold rolling mill, operation method and cold rolling mill
RU2207204C1 (en) * 2002-06-06 2003-06-27 ООО "Сорби стил" Method for optimizing process for making rolled product
JP5737617B2 (en) * 2011-04-01 2015-06-17 株式会社Ihi Apparatus and method for continuous compression of electrode strip
CN103252359A (en) * 2012-02-15 2013-08-21 宝山钢铁股份有限公司 Two-stage tape threading method for controlling finish rolling temperature
CN107716564B (en) * 2017-10-27 2019-04-23 宝钢特钢韶关有限公司 Wire and rod continuous rolling rolled piece detection method and detection device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26996A (en) * 1860-01-31 Washing-machine
US3237071A (en) * 1963-04-05 1966-02-22 Allis Chalmers Mfg Co Motor load distributing system for metal rolling mill
JPS5111746B1 (en) * 1970-06-11 1976-04-13

Also Published As

Publication number Publication date
DE2332570A1 (en) 1974-01-17
IT989426B (en) 1975-05-20
US3762194A (en) 1973-10-02
JPS4956865A (en) 1974-06-03
BR7304500D0 (en) 1974-08-15
FR2190537B3 (en) 1976-06-18
FR2190537A1 (en) 1974-02-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees