JPS57172218A - Detector for tool defect - Google Patents

Detector for tool defect

Info

Publication number
JPS57172218A
JPS57172218A JP5810481A JP5810481A JPS57172218A JP S57172218 A JPS57172218 A JP S57172218A JP 5810481 A JP5810481 A JP 5810481A JP 5810481 A JP5810481 A JP 5810481A JP S57172218 A JPS57172218 A JP S57172218A
Authority
JP
Japan
Prior art keywords
envelope
output
setter
amplifier
signal
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
JP5810481A
Other languages
Japanese (ja)
Inventor
Kiyoshi Nagahata
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP5810481A priority Critical patent/JPS57172218A/en
Publication of JPS57172218A publication Critical patent/JPS57172218A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

PURPOSE:To achieve highly reliabile detection of tool defects by eliminating the influence of noise by transducing mechanical oscillation into an electric signal, and performing envelope detection and then detecting a fault on the basis of the absolute value of a detected envelope. CONSTITUTION:An acoustic emission AE sensor 1 is arranged at a cutting tool 2 and then detects and transduces generated ultrasonic-wave oscillation into an electric signal, which is applied to a filter 6 through an operational amplifier 3, a setter 4, and an operational amplifier 5. A signal from the filter 6 is amplified by a main amplifier 7; a part of the output of the amplifier is outputted to a monitor output terminal 9 through an output amplifier 8, and the remainder is led to an envelope processing circuit 11 through a switching circuit 10, thereby outputting an envelope liquid to a meter 12 and a comparator 13. The level of the set value of a level setter 15 is adjusted by a signal outputted through an oscillator 16, a level setter 17, the switching circuit 10, and the envelope processing circuit 11. The output of the comparator 13 is converted by an A/D converter 18 into a signal 1, which is applied to a counter 19, whose output is compared by a comparator 20 with the count value of a setter 21.
JP5810481A 1981-04-17 1981-04-17 Detector for tool defect Pending JPS57172218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5810481A JPS57172218A (en) 1981-04-17 1981-04-17 Detector for tool defect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5810481A JPS57172218A (en) 1981-04-17 1981-04-17 Detector for tool defect

Publications (1)

Publication Number Publication Date
JPS57172218A true JPS57172218A (en) 1982-10-23

Family

ID=13074646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5810481A Pending JPS57172218A (en) 1981-04-17 1981-04-17 Detector for tool defect

Country Status (1)

Country Link
JP (1) JPS57172218A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6186162A (en) * 1984-08-29 1986-05-01 ゼネラル・エレクトリツク・カンパニイ Method and device for acoustically detecting contact betweencutting tool and work
JPS61192450A (en) * 1985-02-21 1986-08-27 Mitsubishi Heavy Ind Ltd Erroneous cutting judging method
JPS61198058A (en) * 1985-02-28 1986-09-02 Omron Tateisi Electronics Co Tool abrasion detecting system
JPS61257745A (en) * 1985-05-07 1986-11-15 Toshiba Tungaloy Co Ltd Tool wear detecting device
JPS61293755A (en) * 1985-06-18 1986-12-24 Ishikawajima Harima Heavy Ind Co Ltd Tool damage sensor
JPS6391352U (en) * 1986-12-03 1988-06-13
US6338024B1 (en) 1998-04-07 2002-01-08 Fanuc Ltd. Industrial machine having abnormal vibration detecting function
WO2021048968A1 (en) * 2019-09-12 2021-03-18 三菱電機エンジニアリング株式会社 Deterioration amount-detecting device, deterioration amount-detecting method, and deterioration prediction system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537226A (en) * 1978-09-04 1980-03-15 Toshiba Corp Overload monitor for cutting operation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537226A (en) * 1978-09-04 1980-03-15 Toshiba Corp Overload monitor for cutting operation

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6186162A (en) * 1984-08-29 1986-05-01 ゼネラル・エレクトリツク・カンパニイ Method and device for acoustically detecting contact betweencutting tool and work
JPH0436824B2 (en) * 1984-08-29 1992-06-17 Gen Electric
JPS61192450A (en) * 1985-02-21 1986-08-27 Mitsubishi Heavy Ind Ltd Erroneous cutting judging method
JPS61198058A (en) * 1985-02-28 1986-09-02 Omron Tateisi Electronics Co Tool abrasion detecting system
JPS61257745A (en) * 1985-05-07 1986-11-15 Toshiba Tungaloy Co Ltd Tool wear detecting device
JPH0561068B2 (en) * 1985-05-07 1993-09-03 Toshiba Tungaloy Co Ltd
JPS61293755A (en) * 1985-06-18 1986-12-24 Ishikawajima Harima Heavy Ind Co Ltd Tool damage sensor
JPS6391352U (en) * 1986-12-03 1988-06-13
US6338024B1 (en) 1998-04-07 2002-01-08 Fanuc Ltd. Industrial machine having abnormal vibration detecting function
WO2021048968A1 (en) * 2019-09-12 2021-03-18 三菱電機エンジニアリング株式会社 Deterioration amount-detecting device, deterioration amount-detecting method, and deterioration prediction system

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