JPS5788362A - Device and method for detection of stress relief cracking - Google Patents

Device and method for detection of stress relief cracking

Info

Publication number
JPS5788362A
JPS5788362A JP16442380A JP16442380A JPS5788362A JP S5788362 A JPS5788362 A JP S5788362A JP 16442380 A JP16442380 A JP 16442380A JP 16442380 A JP16442380 A JP 16442380A JP S5788362 A JPS5788362 A JP S5788362A
Authority
JP
Japan
Prior art keywords
cracking
period
work
waves
limit switch
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.)
Granted
Application number
JP16442380A
Other languages
Japanese (ja)
Other versions
JPS6337901B2 (en
Inventor
Kazuo Fujimori
Akira Sakano
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP16442380A priority Critical patent/JPS5788362A/en
Publication of JPS5788362A publication Critical patent/JPS5788362A/en
Publication of JPS6337901B2 publication Critical patent/JPS6337901B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2696—Wheels, Gears, Bearings

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To detect the cracking of the work with good accuracy during stress relieving by detecting the AE waves generated from the work with high S/N. CONSTITUTION:A sensor 5 for detecting AE waves is buried in a pressurizing bar 2, and an arm 6 is secured thereto. When the bar 2 descends and abuts on the work 1, a limit switch 9 is turned on by a projecting part 7, and conversely when it ascends, the limit switch 9 is turned off by the part 7. By this limit switch 9, the period I when there is possibility of generation of the AE wave by cracking in the work 1 and the period II when the AE waves other than those by the cracking are generated are set. Out of the output signals from a sensor 5 for AE wave detection, the AE signal generated in the period I is compared with the 1st prescribed value determined beforehand, whereby the presence or absence of the cracking is detected. The AE wave signal generated in the period II is compared with the 2nd prescribed value determined beforehand, whereby whether the detector itself is normal or not is diagnosed.
JP16442380A 1980-11-20 1980-11-20 Device and method for detection of stress relief cracking Granted JPS5788362A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16442380A JPS5788362A (en) 1980-11-20 1980-11-20 Device and method for detection of stress relief cracking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16442380A JPS5788362A (en) 1980-11-20 1980-11-20 Device and method for detection of stress relief cracking

Publications (2)

Publication Number Publication Date
JPS5788362A true JPS5788362A (en) 1982-06-02
JPS6337901B2 JPS6337901B2 (en) 1988-07-27

Family

ID=15792860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16442380A Granted JPS5788362A (en) 1980-11-20 1980-11-20 Device and method for detection of stress relief cracking

Country Status (1)

Country Link
JP (1) JPS5788362A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61108965U (en) * 1984-12-19 1986-07-10

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54134689A (en) * 1978-04-12 1979-10-19 Hitachi Ltd Abnormality detecting method at press fitting in press fitting machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54134689A (en) * 1978-04-12 1979-10-19 Hitachi Ltd Abnormality detecting method at press fitting in press fitting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61108965U (en) * 1984-12-19 1986-07-10

Also Published As

Publication number Publication date
JPS6337901B2 (en) 1988-07-27

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