JPS5596448A - Detecting method of damage of roll - Google Patents

Detecting method of damage of roll

Info

Publication number
JPS5596448A
JPS5596448A JP514679A JP514679A JPS5596448A JP S5596448 A JPS5596448 A JP S5596448A JP 514679 A JP514679 A JP 514679A JP 514679 A JP514679 A JP 514679A JP S5596448 A JPS5596448 A JP S5596448A
Authority
JP
Japan
Prior art keywords
roll
frequency component
damage
acoustic emission
increase ratio
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.)
Pending
Application number
JP514679A
Other languages
Japanese (ja)
Inventor
Takeshi Asai
Takaharu Yamamoto
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP514679A priority Critical patent/JPS5596448A/en
Publication of JPS5596448A publication Critical patent/JPS5596448A/en
Pending 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
    • 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
    • B21B27/02—Shape or construction of 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
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
    • B21B33/02—Preventing fracture of rolls

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To accurately and easily detect the damage of a roll and prevent an accident, by discriminating a prescribed frequency component from an acoustic emission signal which is generated from the roll and by comparing the output increase ratio of the frequency component with a reference value.
CONSTITUTION: The frequency component of 50W500kHz of an acoustic emission signal, which is generated from a roll at rolling work, shows a high output increase ratio when the roll is damaged. A detector 3 is mounted near the super hard alloy member 2 of the roll 1 to detect the acoustic emission signal. The detected signal is transmitted by a radio transmitter 4 and received by a receiver 5. The received signal is supplied to a frequency discriminator 7 through an amplifier 6. The frequency discriminator 7 detects the frequency component of 50W500kHz and applies it to a comparator 8. When the increase ratio P exceeds a reference value P1 in the comparator, an alarm 9 is operated. The damage of the roll is thus accurately and easily detected.
COPYRIGHT: (C)1980,JPO&Japio
JP514679A 1979-01-19 1979-01-19 Detecting method of damage of roll Pending JPS5596448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP514679A JPS5596448A (en) 1979-01-19 1979-01-19 Detecting method of damage of roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP514679A JPS5596448A (en) 1979-01-19 1979-01-19 Detecting method of damage of roll

Publications (1)

Publication Number Publication Date
JPS5596448A true JPS5596448A (en) 1980-07-22

Family

ID=11603151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP514679A Pending JPS5596448A (en) 1979-01-19 1979-01-19 Detecting method of damage of roll

Country Status (1)

Country Link
JP (1) JPS5596448A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62282258A (en) * 1986-05-30 1987-12-08 Koyo Seiko Co Ltd Apparatus for foreseeing life of bearing
WO2019124237A1 (en) * 2017-12-21 2019-06-27 日立金属株式会社 Online crack detection device for roll for rolling, roll for rolling, and online crack detection method for roll for rolling

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62282258A (en) * 1986-05-30 1987-12-08 Koyo Seiko Co Ltd Apparatus for foreseeing life of bearing
WO2019124237A1 (en) * 2017-12-21 2019-06-27 日立金属株式会社 Online crack detection device for roll for rolling, roll for rolling, and online crack detection method for roll for rolling
KR20200081473A (en) * 2017-12-21 2020-07-07 히타치 긴조쿠 가부시키가이샤 Rolling roll online crack detection device, rolling roll, and rolling roll online crack detection method
CN111479640A (en) * 2017-12-21 2020-07-31 日立金属株式会社 On-line crack detection device for rolling roller, rolling roller and on-line crack detection method for rolling roller
JPWO2019124237A1 (en) * 2017-12-21 2020-11-26 日立金属株式会社 Online crack detection device for rolling rolls, rolling rolls, and online crack detection methods for rolling rolls
EP3730228A4 (en) * 2017-12-21 2021-09-22 Hitachi Metals, Ltd. DEVICE AND METHOD FOR ONLINE CRACK DETECTION FOR LAMINATION ROLLER, AND LAMINATE ROLLER
US11340196B2 (en) 2017-12-21 2022-05-24 Hitachi Metals, Ltd. Online crack detection device for rolling roll, rolling roll, and online crack detection method for rolling roll

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