JPS5673346A - Detecting device of abnormality of tool - Google Patents

Detecting device of abnormality of tool

Info

Publication number
JPS5673346A
JPS5673346A JP15037579A JP15037579A JPS5673346A JP S5673346 A JPS5673346 A JP S5673346A JP 15037579 A JP15037579 A JP 15037579A JP 15037579 A JP15037579 A JP 15037579A JP S5673346 A JPS5673346 A JP S5673346A
Authority
JP
Japan
Prior art keywords
abnormality
setting value
output
exceeds
comparator
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
JP15037579A
Other languages
Japanese (ja)
Inventor
Juichi Maruyama
Akio Kodaira
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15037579A priority Critical patent/JPS5673346A/en
Publication of JPS5673346A publication Critical patent/JPS5673346A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

PURPOSE: To prevent erronous signals and to accurately detect the abnormality by a method wherein when a detection value of an acoustic emmision (AE) during a cutting work exceeds the 1st setting value, an integral thereof is performed and when the integral output exceeds the 2nd setting value, an abnormality information signal is sent out.
CONSTITUTION: The acoustic emission (AE) during the cutting work is detected through an AE sensor 1 and the output therefrom is entered into an integrator 9 via an amplifier 2 and a detector 3 and at the same time, the output from the AE sensor 1 is entered into a comparator 7 to be compared with the 1st setting value from a reference value setting apparatus 8. In a comparator 7, when the input A exceeds the 1st setting value B, a pulse signal C is sent to a the integrator and the input A is integrated. The output thereof is sent to a comparator 10 to be compared with the 2nd setting value E from a reference value setting apparatus 11. If the input D exceeds the setting value E, an abnormality signal F is output. With this, an erronous signal is prevented, thus, enabling to accurately detect an abnormality.
COPYRIGHT: (C)1981,JPO&Japio
JP15037579A 1979-11-20 1979-11-20 Detecting device of abnormality of tool Pending JPS5673346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15037579A JPS5673346A (en) 1979-11-20 1979-11-20 Detecting device of abnormality of tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15037579A JPS5673346A (en) 1979-11-20 1979-11-20 Detecting device of abnormality of tool

Publications (1)

Publication Number Publication Date
JPS5673346A true JPS5673346A (en) 1981-06-18

Family

ID=15495611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15037579A Pending JPS5673346A (en) 1979-11-20 1979-11-20 Detecting device of abnormality of tool

Country Status (1)

Country Link
JP (1) JPS5673346A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61230805A (en) * 1985-04-05 1986-10-15 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Detector for state of multi-drill
JPH0215954A (en) * 1988-06-30 1990-01-19 Okuma Mach Works Ltd Tool abnormality monitoring method
WO2004080690A1 (en) * 2003-03-13 2004-09-23 Sumitomo Heavy Industries, Ltd. Molding device and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61230805A (en) * 1985-04-05 1986-10-15 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Detector for state of multi-drill
JPH0215954A (en) * 1988-06-30 1990-01-19 Okuma Mach Works Ltd Tool abnormality monitoring method
WO2004080690A1 (en) * 2003-03-13 2004-09-23 Sumitomo Heavy Industries, Ltd. Molding device and control method thereof

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