JPS5745418A - Detection of looseness of rotary machine - Google Patents

Detection of looseness of rotary machine

Info

Publication number
JPS5745418A
JPS5745418A JP55121048A JP12104880A JPS5745418A JP S5745418 A JPS5745418 A JP S5745418A JP 55121048 A JP55121048 A JP 55121048A JP 12104880 A JP12104880 A JP 12104880A JP S5745418 A JPS5745418 A JP S5745418A
Authority
JP
Japan
Prior art keywords
circuit
work roll
impact force
peak value
detecting
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
JP55121048A
Other languages
Japanese (ja)
Inventor
Tetsuya Kubota
Nakamoto Honda
Toshio Toyoda
Kenji Maekawa
Nobuo Yamada
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.)
Nippon Steel Corp
Nippon Yakin Kogyo Co Ltd
Original Assignee
Nippon Steel Corp
Nippon Yakin Kogyo Co 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 Steel Corp, Nippon Yakin Kogyo Co Ltd filed Critical Nippon Steel Corp
Priority to JP55121048A priority Critical patent/JPS5745418A/en
Publication of JPS5745418A publication Critical patent/JPS5745418A/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
    • B21B38/008—Monitoring or detecting vibration, chatter or chatter marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/18—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills
    • B21B13/20—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills for planetary rolling
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To quantiatively detect the state of loosenness of the rotating parts of rolling mills by detecting the change in the peak value of the sound pressure of ultrasonic sound by impact force. CONSTITUTION:When the rolls having loosened owing to the revolutions of a work roll contact with a rolling material, impact force is larger than that when normal rolls contact with the rolling material, and the ultrasonic sound by the impact force increases as well. The detected ultrasonic sound 7 is amplified in an amplifier 2 via a filtering circuit 1. The output signal of the amplifier 2 has a marker 8 detecting one revolution of a specific work roll as its input terminal. The peak value during one revolution of the specific work roll is detected by a peak value detecting circuit 3. An average value detecting circuit 4 detects the average value of the ultrasonic sounds produced during revolving of each work roll. A divider 5 divides the outputs signals of the circuit 3 and the circuit 4. A comparator 6 compares each input signal and a reference level and outputs an alarm when the set level is exceeded.
JP55121048A 1980-09-03 1980-09-03 Detection of looseness of rotary machine Pending JPS5745418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55121048A JPS5745418A (en) 1980-09-03 1980-09-03 Detection of looseness of rotary machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55121048A JPS5745418A (en) 1980-09-03 1980-09-03 Detection of looseness of rotary machine

Publications (1)

Publication Number Publication Date
JPS5745418A true JPS5745418A (en) 1982-03-15

Family

ID=14801531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55121048A Pending JPS5745418A (en) 1980-09-03 1980-09-03 Detection of looseness of rotary machine

Country Status (1)

Country Link
JP (1) JPS5745418A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103604605A (en) * 2013-07-02 2014-02-26 燕山大学 Portable swivel bearing fault diagnostic device based on ultrasonic information
CN106706303A (en) * 2017-03-02 2017-05-24 湖南科技大学 Rotor-bearing system pedestal looseness state assessment method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103604605A (en) * 2013-07-02 2014-02-26 燕山大学 Portable swivel bearing fault diagnostic device based on ultrasonic information
CN106706303A (en) * 2017-03-02 2017-05-24 湖南科技大学 Rotor-bearing system pedestal looseness state assessment method

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