FR2251802A1 - Cold rolled strip undulation detection - using two oscillating gap detectors for fringe and one transversely for centre - Google Patents

Cold rolled strip undulation detection - using two oscillating gap detectors for fringe and one transversely for centre

Info

Publication number
FR2251802A1
FR2251802A1 FR7437541A FR7437541A FR2251802A1 FR 2251802 A1 FR2251802 A1 FR 2251802A1 FR 7437541 A FR7437541 A FR 7437541A FR 7437541 A FR7437541 A FR 7437541A FR 2251802 A1 FR2251802 A1 FR 2251802A1
Authority
FR
France
Prior art keywords
strip
cold rolled
fringe
transversely
centre
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Withdrawn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
FR7437541A
Other languages
French (fr)
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
Application filed by Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Publication of FR2251802A1 publication Critical patent/FR2251802A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • 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
    • G01B7/287—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures using a plurality of fixed, simultaneously operating transducers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

A contactless check of cold rolled strip for surface defects uses a gap detector which is continuously reciprocated parallel to the reference surface of the strip. This signal is amplified and compared with a reference signal, produced by the detector when at a predetermined distance from the strip. The mismatch signal is analyzed to produce a progressive wave and a standing wave. The waves are analyzed and the condition of the strip is recorded. This control operates accurately enough to be used for the control of a cold rolling mill prodn.
FR7437541A 1973-11-16 1974-11-14 Cold rolled strip undulation detection - using two oscillating gap detectors for fringe and one transversely for centre Withdrawn FR2251802A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12843473A JPS5080860A (en) 1973-11-16 1973-11-16

Publications (1)

Publication Number Publication Date
FR2251802A1 true FR2251802A1 (en) 1975-06-13

Family

ID=14984638

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7437541A Withdrawn FR2251802A1 (en) 1973-11-16 1974-11-14 Cold rolled strip undulation detection - using two oscillating gap detectors for fringe and one transversely for centre

Country Status (3)

Country Link
JP (1) JPS5080860A (en)
DE (1) DE2452876A1 (en)
FR (1) FR2251802A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2289880A1 (en) * 1974-10-31 1976-05-28 Nippon Kokan Kk METHOD AND APPARATUS FOR MEASURING THE PROFILE OF METAL STRIPS
EP0169368A2 (en) * 1984-06-26 1986-01-29 Siemens Aktiengesellschaft Device for the determination of the derivations of circular form of dynamically balanced parts

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5260162A (en) * 1975-11-12 1977-05-18 Sumitomo Metal Ind Method of inspecting bad shape of steel band being rolled
JPS5287054A (en) * 1976-01-16 1977-07-20 Ono Sokki Seisakusho Kk Method of measuring endmost position of vibrating body
JPS55104705A (en) * 1979-01-29 1980-08-11 Nippon Kokan Kk <Nkk> Measuring method for shape of metal strip
GB8902621D0 (en) * 1989-02-07 1989-03-30 Davy Mckee Poole The measurement of shape of metal strip
JP2006208370A (en) * 2004-12-28 2006-08-10 Non-Destructive Inspection Co Ltd Surface displacement measuring method and surface displacement measuring apparatus used for the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2289880A1 (en) * 1974-10-31 1976-05-28 Nippon Kokan Kk METHOD AND APPARATUS FOR MEASURING THE PROFILE OF METAL STRIPS
EP0169368A2 (en) * 1984-06-26 1986-01-29 Siemens Aktiengesellschaft Device for the determination of the derivations of circular form of dynamically balanced parts
EP0169368A3 (en) * 1984-06-26 1987-07-15 Siemens Aktiengesellschaft Berlin Und Munchen Device for the determination of the derivations of circular form of dynamically balanced parts

Also Published As

Publication number Publication date
JPS5080860A (en) 1975-07-01
DE2452876A1 (en) 1975-05-22

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Legal Events

Date Code Title Description
ST Notification of lapse