JPS5548513A - Abnormality detecting method of milling cutter in cutting machine and its abnormality detector - Google Patents

Abnormality detecting method of milling cutter in cutting machine and its abnormality detector

Info

Publication number
JPS5548513A
JPS5548513A JP12115778A JP12115778A JPS5548513A JP S5548513 A JPS5548513 A JP S5548513A JP 12115778 A JP12115778 A JP 12115778A JP 12115778 A JP12115778 A JP 12115778A JP S5548513 A JPS5548513 A JP S5548513A
Authority
JP
Japan
Prior art keywords
vibration
circuit
chip
output
abnormality
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
JP12115778A
Other languages
Japanese (ja)
Other versions
JPS5939262B2 (en
Inventor
Toshiro Maeda
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 JP12115778A priority Critical patent/JPS5939262B2/en
Publication of JPS5548513A publication Critical patent/JPS5548513A/en
Publication of JPS5939262B2 publication Critical patent/JPS5939262B2/en
Expired 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0904—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool before or after machining
    • B23Q17/0919—Arrangements for measuring or adjusting cutting-tool geometry in presetting devices
    • B23Q17/0947—Monitoring devices for measuring cutting angles
    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/12—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring vibration

Landscapes

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

Abstract

PURPOSE:To improve operation efficiency, and to prevent false detection, by detecting vibration every chip, by comparing the vibration with the vibration of a chip at the previous stage and by detecting the vibration as abnormality when the difference becomes larger than a set point. CONSTITUTION:Vibration produced in the case when each chip 4b of a milling cutter 4 cuts a work is detected by means of a vibration detector 5 mounted to a main shaft head 1, and the output is input to a substraction circuit 8, a delay circuit 9 and wave-form shaping circuit 10 through an amplifier 7, etc. The output of a revolution detecting switch 11 working together with a dock 4c is input to a reference timing generator 12. Vibration detecting signals are delayed by means of the delay circuit 9 only by a portion corresponding to one pitch of the chips, and put out to the substraction circuit 8, and the signals and original signals are subtracted here and delivered to an integration circuit 14. The output of the integration circuit 14 is compared with a set point 16 by means of a comparison circuit 15, and an annunciator 19 is operated through a chip abnormality memory 17 in response to the output.
JP12115778A 1978-10-03 1978-10-03 Abnormality detection device for milling cutters in cutting machines Expired JPS5939262B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12115778A JPS5939262B2 (en) 1978-10-03 1978-10-03 Abnormality detection device for milling cutters in cutting machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12115778A JPS5939262B2 (en) 1978-10-03 1978-10-03 Abnormality detection device for milling cutters in cutting machines

Publications (2)

Publication Number Publication Date
JPS5548513A true JPS5548513A (en) 1980-04-07
JPS5939262B2 JPS5939262B2 (en) 1984-09-21

Family

ID=14804252

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12115778A Expired JPS5939262B2 (en) 1978-10-03 1978-10-03 Abnormality detection device for milling cutters in cutting machines

Country Status (1)

Country Link
JP (1) JPS5939262B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621749A (en) * 1979-07-26 1981-02-28 Mitsubishi Electric Corp Detector for abnormality of tool
WO1983002416A1 (en) * 1982-01-12 1983-07-21 Shimizu, Yutaka Numerical control machining system
JPS59116513A (en) * 1982-12-24 1984-07-05 Sumitomo Heavy Ind Ltd Abnormality detecting device for blade
JPS6274553A (en) * 1985-09-25 1987-04-06 Kawasaki Steel Corp Method for detecting abnormality in machine tool

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621749A (en) * 1979-07-26 1981-02-28 Mitsubishi Electric Corp Detector for abnormality of tool
WO1983002416A1 (en) * 1982-01-12 1983-07-21 Shimizu, Yutaka Numerical control machining system
JPS59116513A (en) * 1982-12-24 1984-07-05 Sumitomo Heavy Ind Ltd Abnormality detecting device for blade
JPH035942B2 (en) * 1982-12-24 1991-01-28 Sumitomo Heavy Industries
JPS6274553A (en) * 1985-09-25 1987-04-06 Kawasaki Steel Corp Method for detecting abnormality in machine tool
JPH0133299B2 (en) * 1985-09-25 1989-07-12 Kawasaki Steel Co

Also Published As

Publication number Publication date
JPS5939262B2 (en) 1984-09-21

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