JPS555252A - Method of detecting fault of tool in machine tool - Google Patents

Method of detecting fault of tool in machine tool

Info

Publication number
JPS555252A
JPS555252A JP7737978A JP7737978A JPS555252A JP S555252 A JPS555252 A JP S555252A JP 7737978 A JP7737978 A JP 7737978A JP 7737978 A JP7737978 A JP 7737978A JP S555252 A JPS555252 A JP S555252A
Authority
JP
Japan
Prior art keywords
tool
fault
signal
generated
motor
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
JP7737978A
Other languages
Japanese (ja)
Other versions
JPS5820743B2 (en
Inventor
Yoshito Kato
Koji Nogami
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP53077379A priority Critical patent/JPS5820743B2/en
Publication of JPS555252A publication Critical patent/JPS555252A/en
Publication of JPS5820743B2 publication Critical patent/JPS5820743B2/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

Landscapes

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

Abstract

PURPOSE:To detect any fault of a tool by the continuous rise of an armature current of a DC motor for driving a supply device, thereby to detect the fault in the tool accurately and with a high reliability without using any specific senser or jig. CONSTITUTION:In a case where a tool 5 is normal, the armature current of a DC motor 10 is small, and a voltage generated at a resistor 23 is also small. Hence, a high level signal is not generated from a comparator 25, and even when a signal is generated on some reason or other, a tool fault signal is not produced from a time limit circuit 27 because the time of the signal generated is extremely small. In a case where a fault, that is, a damage or an excessive wear occurs, a working resistance increases, and the feed resistance of a slide 6 increases, and hence the load of a motor 10 becomes large and the armature current becomes continuously large. For this reason, the output of the comparator 25 assumes continuously a high level, and a tool fault signal is produced as output from the time limit circuit 27, thus a fault alarm sender 28 being operated.
JP53077379A 1978-06-28 1978-06-28 Tool abnormality detection method for machine tools Expired JPS5820743B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53077379A JPS5820743B2 (en) 1978-06-28 1978-06-28 Tool abnormality detection method for machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53077379A JPS5820743B2 (en) 1978-06-28 1978-06-28 Tool abnormality detection method for machine tools

Publications (2)

Publication Number Publication Date
JPS555252A true JPS555252A (en) 1980-01-16
JPS5820743B2 JPS5820743B2 (en) 1983-04-25

Family

ID=13632251

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53077379A Expired JPS5820743B2 (en) 1978-06-28 1978-06-28 Tool abnormality detection method for machine tools

Country Status (1)

Country Link
JP (1) JPS5820743B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56139858A (en) * 1980-03-27 1981-10-31 Komatsu Ltd Tool abnormality detecting method of nc machine tool
JPS58126041A (en) * 1982-01-18 1983-07-27 Mitsubishi Heavy Ind Ltd Detector for abnormality of tool
US5030920A (en) * 1988-10-14 1991-07-09 Sumitomo Electric Industries, Ltd. Method of detecting wear of cutting tool by ascertaining a tool workpiece contact resistance
WO1994021425A1 (en) * 1993-03-17 1994-09-29 Fanuc Ltd Tool life management method by estimation of disturbance load
JP2016087781A (en) * 2014-10-30 2016-05-23 Ｊｆｅスチール株式会社 Processing method and processing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54113582A (en) * 1978-02-24 1979-09-05 Hitachi Ltd Abnormal conoition monitor of machine tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54113582A (en) * 1978-02-24 1979-09-05 Hitachi Ltd Abnormal conoition monitor of machine tool

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56139858A (en) * 1980-03-27 1981-10-31 Komatsu Ltd Tool abnormality detecting method of nc machine tool
JPS58126041A (en) * 1982-01-18 1983-07-27 Mitsubishi Heavy Ind Ltd Detector for abnormality of tool
US5030920A (en) * 1988-10-14 1991-07-09 Sumitomo Electric Industries, Ltd. Method of detecting wear of cutting tool by ascertaining a tool workpiece contact resistance
WO1994021425A1 (en) * 1993-03-17 1994-09-29 Fanuc Ltd Tool life management method by estimation of disturbance load
US5602347A (en) * 1993-03-17 1997-02-11 Fanuc Ltd. Tool life control method based on disturbance load torque of motor
JP2016087781A (en) * 2014-10-30 2016-05-23 Ｊｆｅスチール株式会社 Processing method and processing device

Also Published As

Publication number Publication date
JPS5820743B2 (en) 1983-04-25

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