GB1288481A - - Google Patents

Info

Publication number
GB1288481A
GB1288481A GB1288481DA GB1288481A GB 1288481 A GB1288481 A GB 1288481A GB 1288481D A GB1288481D A GB 1288481DA GB 1288481 A GB1288481 A GB 1288481A
Authority
GB
United Kingdom
Prior art keywords
gap
inductance
rolls
inductor
armature
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
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 filed Critical
Publication of GB1288481A publication Critical patent/GB1288481A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/10—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

1288481 Automatic control of rolling VEREINIGTE FLUGTECHNISCHE WERKEFOKKER GmbH 11 Feb 1970 [21 June 1969] 6692/70 Heading G3R [Also in Division G1] The gap between mill rolls is automatically regulated in response to variations of the spacing between an armature, mounted on one roll journal, and an associated inductor, mounted on the other roll journal, connected to an adjacent inductor to provide compensation in a bridge circuit which also includes a gap-setting and a further compensating inductor. In Fig.2, plates 12, 17 are respectively attached to members (not shown) which respectively slip over the shafts of lower and upper working rolls of a rolling mill stand so that the gap 37 between them is equal to that between the rolls. One plate contains a core 32 and the other the armature 35 of an inductance which varies with the air gap and forms, with a fixed inductance 31, one section of a bridge circuit. Inductance 31 is located in plate 12 so as to experience the same temperature variations and, if the plates are of non-magnetic material, magnetic screens 40, 41, 42 are provided. A further inductance (not shown) is adjustable to set the gap desired and is connected with a further fixed inductance to form the other section of the bridge which is supplied with A. C. of suitable frequency and controls, through a rectifier and operational amplifier, an electro-hydraulic servosystem varying the pressure on the lower working roll to maintain the desired gap. The gain of the operational amplifier is varied automatically with the setting of the gap desired, to compensate for non- linearity of the variable inductance.
GB1288481D 1969-06-21 1970-02-11 Expired GB1288481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691931654 DE1931654B2 (en) 1969-06-21 1969-06-21 ROLLER GAP POSITION CONTROL FOR ROLLING STANDS

Publications (1)

Publication Number Publication Date
GB1288481A true GB1288481A (en) 1972-09-13

Family

ID=5737706

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1288481D Expired GB1288481A (en) 1969-06-21 1970-02-11

Country Status (5)

Country Link
US (1) US3662576A (en)
DE (1) DE1931654B2 (en)
FR (1) FR2052831A5 (en)
GB (1) GB1288481A (en)
SE (1) SE353792B (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902114A (en) * 1967-10-20 1975-08-26 Gunther Alich Method of and apparatus for measuring the distance between cooperating rollers of a rolling mill
DE2112981B2 (en) * 1971-03-17 1974-10-31 Fried. Krupp Gmbh, 4300 Essen Roll gap measurement on roll stands Änm: Fried. Krupp GmbH, 4300 Essen
DE2157011A1 (en) * 1971-11-17 1973-05-24 Krauss Maffei Ag DISTANCE MEASURING ARRANGEMENT FOR ELECTROMAGNETIC SUPPORTING OR GUIDING SYSTEMS FOR HOVER VEHICLES
DE2224909A1 (en) * 1972-05-20 1973-11-22 Ver Flugtechnische Werke ARRANGEMENT FOR MEASURING THE GAP OF A PAIR OF ROLLS FOR A ROLLING STAND
DE2224833C3 (en) * 1972-05-20 1981-05-21 Vereinigte Flugtechnische Werke Gmbh, 2800 Bremen Device for measuring the gap of a pair of work rolls for a roll stand
DE2228336C2 (en) * 1972-06-10 1983-04-14 Vereinigte Flugtechnische Werke Gmbh, 2800 Bremen Rolling mill inductive roll gap sensor - using two=part inductances on both sides of the roll gap
JPS563149B2 (en) * 1973-06-11 1981-01-23
DE2404763C2 (en) * 1974-02-01 1982-05-13 Vereinigte Flugtechnische Werke Gmbh, 2800 Bremen Measuring device for detecting the gap in a pair of work rolls
GB1529861A (en) * 1975-01-14 1978-10-25 Loewy Robertson Eng Co Ltd Roll gap measurement
DE2855912C2 (en) * 1978-12-23 1988-08-18 Nix, Norbert, Dr., 5000 Köln Device for measuring the thickness of solid coatings on a base material
DE3019540C2 (en) * 1980-05-22 1984-02-09 Nix, Norbert, Dr., 5000 Köln Device for measuring the thickness of solid coatings on a base material
US4661774A (en) * 1983-12-12 1987-04-28 Harris Graphics Corporation Method and apparatus for monitoring film thickness between rotatable rolls
US4767987A (en) * 1983-12-12 1988-08-30 Harris Graphics Corporation Method and apparatus for monitoring film thicknesses by sensing magnetic interaction between members movable to a film thickness distance
US4814703A (en) * 1987-08-04 1989-03-21 The Boeing Company Method and apparatus for gap measurement between a graphite/epoxy structure and a metallic model
DE3913996A1 (en) * 1989-02-16 1990-08-23 Rieter Ag Maschf TEASEL
IT1234006B (en) * 1989-07-05 1992-04-23 Gd Spa DEVICE FOR THE CONTROL OF LOW REELS, IN PARTICULAR APPLICABLE ON WRAPPING MACHINES
US5089776A (en) * 1989-09-25 1992-02-18 Nkk Corporation Apparatus for detecting defects in a moving steel strip with a magnetizing yoke and a sensor placed on opposite sides of the strip
WO1991013347A1 (en) * 1990-02-22 1991-09-05 Nkk Corporation Magnetic flaw detector for thin steel belt
US5155444A (en) * 1991-08-22 1992-10-13 Xerox Corporation Trim bar gap verification tool and method using a flexible capacitor sensor having a magnetic metallic laminate
JP2626942B2 (en) * 1992-02-21 1997-07-02 株式会社ブリヂストン Method and apparatus for controlling sheet thickness in calendering
US5698977A (en) * 1993-10-12 1997-12-16 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Eddy current method for fatigue testing
GB9505382D0 (en) * 1995-03-17 1995-05-03 Radiodetection Ltd Inductive transmitters for conductor location
FI103918B1 (en) * 1998-02-26 1999-10-15 Valmet Automation Inc Method and device for measuring the characteristics of a movable track
EP3426418B1 (en) * 2016-03-08 2020-11-18 Novelis Inc. Method and apparatus for controlling metal strip profile during rolling with direct measurement of process parameters

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711510A (en) * 1950-06-21 1955-06-21 Rca Corp Metal detector balance controls
CA668803A (en) * 1956-12-03 1963-08-20 Minneapolis-Honeywell Regulator Company Magnetic control apparatus
US3208251A (en) * 1961-05-03 1965-09-28 Westinghouse Canada Ltd Rolling mill control system
US3389588A (en) * 1965-03-09 1968-06-25 United States Steel Corp Apparatus for controlling the position of work rolls
GB1190738A (en) * 1966-08-16 1970-05-06 United Eng Foundry Co Means for indicating the Roll Pass Opening in a Rolling Mill or Calender
GB1182160A (en) * 1966-12-30 1970-02-25 Shibaura Kyodo Kogyo Kabushiki Rolling Mill Control Apparatus.
US3441840A (en) * 1967-03-31 1969-04-29 Martin Marietta Corp Electronic thickness meter having direct readout of coating thickness

Also Published As

Publication number Publication date
SE353792B (en) 1973-02-12
DE1931654A1 (en) 1971-05-27
US3662576A (en) 1972-05-16
DE1931654B2 (en) 1971-11-11
FR2052831A5 (en) 1971-04-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee