JPS57205049A - Detecting unit of defective abrasion for cutting tool - Google Patents

Detecting unit of defective abrasion for cutting tool

Info

Publication number
JPS57205049A
JPS57205049A JP9051781A JP9051781A JPS57205049A JP S57205049 A JPS57205049 A JP S57205049A JP 9051781 A JP9051781 A JP 9051781A JP 9051781 A JP9051781 A JP 9051781A JP S57205049 A JPS57205049 A JP S57205049A
Authority
JP
Japan
Prior art keywords
signal
amplitude
abrasion
detector
threshold value
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
JP9051781A
Other languages
Japanese (ja)
Inventor
Yoshiaki Kakino
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP9051781A priority Critical patent/JPS57205049A/en
Publication of JPS57205049A publication Critical patent/JPS57205049A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37351—Detect vibration, ultrasound

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

PURPOSE:To detect defective abrasion of tools stably by dissolving an acoustic emission signal into signal components in two frequency ranges, obtaining the amplitude ratio between both signal components, averaging them for a certain time, and comparing it with a predetermined threshold value. CONSTITUTION:An AE signal, after performing impedance conversion, is amplified and goes through bandpass filters 14, 15 and is detected by detectors 16, 17. Next, a ratio X/Y between an amplitude X of the signal component in a specific frequency range f1-f2 from the detector 16 and an amplitude Y of the signal component in a frequency range f0-f1 from the detector 17 is generated in a divider 18, and it is fed to a comparator 20 through an averaging circuit 19 so as to be compared with a threshold value VL. Thereby, a phenomenon that the AE signals continue for a longer time than a certain period under abnormal abrasion can be utilized to distinguish from the AE signals with a short duration occurring due to collision by chips, etc.
JP9051781A 1981-06-12 1981-06-12 Detecting unit of defective abrasion for cutting tool Pending JPS57205049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9051781A JPS57205049A (en) 1981-06-12 1981-06-12 Detecting unit of defective abrasion for cutting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9051781A JPS57205049A (en) 1981-06-12 1981-06-12 Detecting unit of defective abrasion for cutting tool

Publications (1)

Publication Number Publication Date
JPS57205049A true JPS57205049A (en) 1982-12-16

Family

ID=14000641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9051781A Pending JPS57205049A (en) 1981-06-12 1981-06-12 Detecting unit of defective abrasion for cutting tool

Country Status (1)

Country Link
JP (1) JPS57205049A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079260A (en) * 1983-10-06 1985-05-07 Nachi Fujikoshi Corp Tool abnormality detector
JPS61182571A (en) * 1985-02-08 1986-08-15 Omron Tateisi Electronics Co Foreknowing device for tool breakage
JPH01234137A (en) * 1988-03-10 1989-09-19 Sumitomo Electric Ind Ltd Method and apparatus for detecting life of cutting tool
JPH0354435A (en) * 1989-07-21 1991-03-08 Tochigi Pref Gov Method and apparatus for predicting abrasion and damage of machine tool
JP2008102022A (en) * 2006-10-19 2008-05-01 Nippon Mektron Ltd High-speed bend testing equipment
JPWO2013088849A1 (en) * 2011-12-16 2015-04-27 株式会社日立製作所 Cutting apparatus and processing method using the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079260A (en) * 1983-10-06 1985-05-07 Nachi Fujikoshi Corp Tool abnormality detector
JPH0423216B2 (en) * 1983-10-06 1992-04-21 Fujikoshi Kk
JPS61182571A (en) * 1985-02-08 1986-08-15 Omron Tateisi Electronics Co Foreknowing device for tool breakage
JPH01234137A (en) * 1988-03-10 1989-09-19 Sumitomo Electric Ind Ltd Method and apparatus for detecting life of cutting tool
JPH0354435A (en) * 1989-07-21 1991-03-08 Tochigi Pref Gov Method and apparatus for predicting abrasion and damage of machine tool
JP2008102022A (en) * 2006-10-19 2008-05-01 Nippon Mektron Ltd High-speed bend testing equipment
JPWO2013088849A1 (en) * 2011-12-16 2015-04-27 株式会社日立製作所 Cutting apparatus and processing method using the same

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