JPS57163041A - Detecting device of cutting abnormality - Google Patents

Detecting device of cutting abnormality

Info

Publication number
JPS57163041A
JPS57163041A JP4312581A JP4312581A JPS57163041A JP S57163041 A JPS57163041 A JP S57163041A JP 4312581 A JP4312581 A JP 4312581A JP 4312581 A JP4312581 A JP 4312581A JP S57163041 A JPS57163041 A JP S57163041A
Authority
JP
Japan
Prior art keywords
abnormality
change
main spindle
spindle motor
current
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
JP4312581A
Other languages
Japanese (ja)
Inventor
Hajime Inaba
Yukio Ono
Mitsuo Hiraizumi
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP4312581A priority Critical patent/JPS57163041A/en
Publication of JPS57163041A publication Critical patent/JPS57163041A/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

Landscapes

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

Abstract

PURPOSE:To also detect abnormality of cutting immediately after a main spindle motor is started, by discriminating between the change of a current, caused from a start or stop of the main spindle motor, and the change of a current, caused from abnormality of a tool. CONSTITUTION:In a rise-up (fall down) time calculator circuit 34, on the basis of a detected speed and stored machine proper value (output from a machine constant memory device 33), a rise-up and fall down time of an electric motor 1 is calculated, and whether a start or stop of the main spindle motor 1 is commanded or not is decided in a comparator circuit 35. In case of a decision of start stop, a start stop display circuit 36 is operated, and cutting abnormality is not detected in an abnormality detector circuit 37. In case of start stop not commanded, a differentiated signal of change in a main spindle motor current is fed, and occurrence of cutting abnormality is supervised in the abnormality detector circuit 37. In this way, the change of a current at start stop of the main spindle motor can be separated from the change of a current during cutting work.
JP4312581A 1981-03-26 1981-03-26 Detecting device of cutting abnormality Pending JPS57163041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4312581A JPS57163041A (en) 1981-03-26 1981-03-26 Detecting device of cutting abnormality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4312581A JPS57163041A (en) 1981-03-26 1981-03-26 Detecting device of cutting abnormality

Publications (1)

Publication Number Publication Date
JPS57163041A true JPS57163041A (en) 1982-10-07

Family

ID=12655117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4312581A Pending JPS57163041A (en) 1981-03-26 1981-03-26 Detecting device of cutting abnormality

Country Status (1)

Country Link
JP (1) JPS57163041A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02160454A (en) * 1988-12-12 1990-06-20 Hitachi Seiki Co Ltd Monitoring device for cutting
JPH0349849A (en) * 1989-07-17 1991-03-04 Enshu Cloth Kk Tool damage detecting device with study function
JP2019030954A (en) * 2017-08-07 2019-02-28 Dmg森精機株式会社 Machine tool and method for calculating degree of abrasion of tool
JP2020154921A (en) * 2019-03-22 2020-09-24 ブラザー工業株式会社 Numerical control device and control method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5614135A (en) * 1979-07-13 1981-02-10 Hitachi Seiki Co Ltd Detector for cutting abnormality of machine tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5614135A (en) * 1979-07-13 1981-02-10 Hitachi Seiki Co Ltd Detector for cutting abnormality of machine tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02160454A (en) * 1988-12-12 1990-06-20 Hitachi Seiki Co Ltd Monitoring device for cutting
JPH0349849A (en) * 1989-07-17 1991-03-04 Enshu Cloth Kk Tool damage detecting device with study function
JP2019030954A (en) * 2017-08-07 2019-02-28 Dmg森精機株式会社 Machine tool and method for calculating degree of abrasion of tool
JP2020154921A (en) * 2019-03-22 2020-09-24 ブラザー工業株式会社 Numerical control device and control method
CN111716148A (en) * 2019-03-22 2020-09-29 兄弟工业株式会社 Numerical controller and control method for numerical controller

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