JPS5633256A - Abnoramality sensing device for milling machine - Google Patents

Abnoramality sensing device for milling machine

Info

Publication number
JPS5633256A
JPS5633256A JP10790679A JP10790679A JPS5633256A JP S5633256 A JPS5633256 A JP S5633256A JP 10790679 A JP10790679 A JP 10790679A JP 10790679 A JP10790679 A JP 10790679A JP S5633256 A JPS5633256 A JP S5633256A
Authority
JP
Japan
Prior art keywords
fed
motor
tool
calculation unit
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.)
Granted
Application number
JP10790679A
Other languages
Japanese (ja)
Other versions
JPS6144623B2 (en
Inventor
Izumi Kimura
Fumio Kamado
Haruhisa Mukoyama
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.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co 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 Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP10790679A priority Critical patent/JPS5633256A/en
Publication of JPS5633256A publication Critical patent/JPS5633256A/en
Publication of JPS6144623B2 publication Critical patent/JPS6144623B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To provide a positive sensing of a damaged condition of the tool and a normal condition of the tool by a method wherein a relation between a width of wariation of a major axis current value and a mean value during a cutting operation which is accompanied by an intermittent cutting operation specified in a milling operation is utilized. CONSTITUTION:Electric current of the armature in DC motor 61 is sensed by a shunt circuit 62 and the output is fed to a calculation unit 65 for the width W of variation found in a cutting current of the motor 61 and a calculation unit 66 for a mean value R of an electric current of the motor through a low pass filter 63, A/D converter 64. The outputs from the calculation units 65, 66 are fed to the calculation unit 67 and one dimensionless value (R/W) or (W/R) is calculated in reference to two values of R and W. The calculated value is fed to the discrimination unit 71 and it is judged wheater the cutting tool is in an abnormal or normal condition.
JP10790679A 1979-08-24 1979-08-24 Abnoramality sensing device for milling machine Granted JPS5633256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10790679A JPS5633256A (en) 1979-08-24 1979-08-24 Abnoramality sensing device for milling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10790679A JPS5633256A (en) 1979-08-24 1979-08-24 Abnoramality sensing device for milling machine

Publications (2)

Publication Number Publication Date
JPS5633256A true JPS5633256A (en) 1981-04-03
JPS6144623B2 JPS6144623B2 (en) 1986-10-03

Family

ID=14471054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10790679A Granted JPS5633256A (en) 1979-08-24 1979-08-24 Abnoramality sensing device for milling machine

Country Status (1)

Country Link
JP (1) JPS5633256A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002416A1 (en) * 1982-01-12 1983-07-21 Shimizu, Yutaka Numerical control machining system
JPS6294250A (en) * 1985-10-18 1987-04-30 Mazda Motor Corp Device for detecting life of perforating tool
JP2019179312A (en) * 2018-03-30 2019-10-17 ファナック株式会社 Motor control device
JP2020042347A (en) * 2018-09-06 2020-03-19 東芝機械株式会社 Machine tool and tool abnormality determination method
JP2020093305A (en) * 2018-12-10 2020-06-18 Dmg森精機株式会社 Machine tool, loss detection method, and loss detection program

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002416A1 (en) * 1982-01-12 1983-07-21 Shimizu, Yutaka Numerical control machining system
JPS6294250A (en) * 1985-10-18 1987-04-30 Mazda Motor Corp Device for detecting life of perforating tool
JP2019179312A (en) * 2018-03-30 2019-10-17 ファナック株式会社 Motor control device
US11714395B2 (en) 2018-03-30 2023-08-01 Fanuc Corporation Motor control device
JP2020042347A (en) * 2018-09-06 2020-03-19 東芝機械株式会社 Machine tool and tool abnormality determination method
JP2020093305A (en) * 2018-12-10 2020-06-18 Dmg森精機株式会社 Machine tool, loss detection method, and loss detection program

Also Published As

Publication number Publication date
JPS6144623B2 (en) 1986-10-03

Similar Documents

Publication Publication Date Title
KR830008788A (en) Protective device for automatic tool changer
JPS5531541A (en) Abnormality detecting system for cutting tool
JPS61274813A (en) Confirming device for hole machining completion in electric discharge machine
JPS56152525A (en) Electric processing device
JPS54113582A (en) Abnormal conoition monitor of machine tool
SE8400885D0 (en) DEVICE FOR DETERMINATION OF WINDOW CIRCUITS IN ROTORS TO COMMUTOR MOTORS
JPS57163041A (en) Detecting device of cutting abnormality
JPS5639852A (en) Abnormality detector for cutting tool of machine tool
JPS5387089A (en) Wire-cut electric discharge machining apparatus
JPS555252A (en) Method of detecting fault of tool in machine tool
JPS5721251A (en) Detection of abnormal condition of turning tool
EP0354967B1 (en) Gap voltage detector for wire cut electric discharge machines
SU798714A1 (en) Apparatus for controlling grinding machine feed
SU1143514A1 (en) Method of measuring tangential component of cutting force in multicutter turning
JPS57158539A (en) Abnormal tool monitoring system
JPS561368A (en) Failure detection pair cable
DE3664697D1 (en) Method and apparatus for the detection of damage on the cutting and knife plates of cutting machines
JPS55109574A (en) Consumable electrode feed amount control unit in automatic welding machine
JPH06114635A (en) Discharge machining device
JPS571643A (en) Feed control equipment of machine tool
JPS5720190A (en) Detecting method for rotor position of rotary electric machine
JPS5748450A (en) Detecting method of abnormality of tool in machine tool
JPS56140419A (en) Diagnostic method for fault of digital control device
JPS5310017A (en) Field monitoring device of brushless synchronous motor
SU466069A1 (en) Device for controlling the load on the cutting tool of metalworking machines