JPS5721251A - Detection of abnormal condition of turning tool - Google Patents

Detection of abnormal condition of turning tool

Info

Publication number
JPS5721251A
JPS5721251A JP9136880A JP9136880A JPS5721251A JP S5721251 A JPS5721251 A JP S5721251A JP 9136880 A JP9136880 A JP 9136880A JP 9136880 A JP9136880 A JP 9136880A JP S5721251 A JPS5721251 A JP S5721251A
Authority
JP
Japan
Prior art keywords
current
threshold
abnormal condition
feed motor
signal
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
JP9136880A
Other languages
Japanese (ja)
Other versions
JPS5830107B2 (en
Inventor
Hideyuki Wakai
Masatake Kashimoto
Chiaki Sakamoto
Eiji Mizutani
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 JP55091368A priority Critical patent/JPS5830107B2/en
Priority to US06/279,033 priority patent/US4442493A/en
Priority to GB8120080A priority patent/GB2082346B/en
Priority to DE3126276A priority patent/DE3126276A1/en
Publication of JPS5721251A publication Critical patent/JPS5721251A/en
Publication of JPS5830107B2 publication Critical patent/JPS5830107B2/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
    • 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
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34465—Safety, control of correct operation, abnormal states
    • 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
    • G05B2219/37245—Breakage tool, failure
    • 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
    • G05B2219/37285—Load, current taken by motor
    • 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
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50112—Retract tool to a point

Abstract

PURPOSE:To enable to detect the generation of an abnormal condition of a tool easily and correctly, by a method wherein the current passing in a feed motor is detected when an abnormal condition occurs at a turning tool, and the condition is judged to be abnormal when the current value detected exceeds a preset value. CONSTITUTION:A main spindle motor 2 of a swivelling automatic machine 1 rotates a chuck 3 gripping a work. The feed motor 4 controls the feed of a tool rest 6 fitted with cutting tools 7, 8 or the like. A setter 12 is provided for setting a threshold current and it generates a set voltage signal corresponding to the threshold current. A comparator 13 compares a signal V generated by a current detector 10 with the set signal Vc, and it generates an abnormality detection signal when V> Vc. Thus, a threshold value is selected from a plurality of threshold values in accordance with NC information, and an abnormality detection signal is outputted when the current flowing in the feed motor exceeds the relevant threshold value.
JP55091368A 1980-07-04 1980-07-04 Abnormality detection device for turning tools Expired JPS5830107B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55091368A JPS5830107B2 (en) 1980-07-04 1980-07-04 Abnormality detection device for turning tools
US06/279,033 US4442493A (en) 1980-07-04 1981-06-30 Cutting tool retreat and return for workpiece protection upon abnormality occurrence in a preprogrammed machine tool
GB8120080A GB2082346B (en) 1980-07-04 1981-06-30 Method and device for automatically retreating and returning a tool in a machine tool
DE3126276A DE3126276A1 (en) 1980-07-04 1981-07-03 METHOD AND DEVICE FOR THE AUTOMATIC RELEASE AND RETURN OF A TOOL OF A TOOL MACHINE IN RELATION TO A WORKPIECE TO BE MACHINED

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55091368A JPS5830107B2 (en) 1980-07-04 1980-07-04 Abnormality detection device for turning tools

Publications (2)

Publication Number Publication Date
JPS5721251A true JPS5721251A (en) 1982-02-03
JPS5830107B2 JPS5830107B2 (en) 1983-06-27

Family

ID=14024428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55091368A Expired JPS5830107B2 (en) 1980-07-04 1980-07-04 Abnormality detection device for turning tools

Country Status (1)

Country Link
JP (1) JPS5830107B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018024048A (en) * 2016-08-09 2018-02-15 ファナック株式会社 Servo controller, main shaft failure detection method using the same, and computer program
CN114986254A (en) * 2022-06-28 2022-09-02 大众一汽发动机（大连）有限公司 Numerical control machine tool electric spindle pad scrap detection method
WO2023167059A1 (en) * 2022-03-01 2023-09-07 シチズン時計株式会社 Machine tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50117481U (en) * 1974-03-08 1975-09-25
JPS51122881A (en) * 1975-04-18 1976-10-27 Shin Nippon Koki Kk Feed speed control for machine tools
JPS5537104U (en) * 1978-08-25 1980-03-10

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5261975A (en) * 1975-11-18 1977-05-21 Matsushita Electric Ind Co Ltd Semiconductor device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50117481U (en) * 1974-03-08 1975-09-25
JPS51122881A (en) * 1975-04-18 1976-10-27 Shin Nippon Koki Kk Feed speed control for machine tools
JPS5537104U (en) * 1978-08-25 1980-03-10

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018024048A (en) * 2016-08-09 2018-02-15 ファナック株式会社 Servo controller, main shaft failure detection method using the same, and computer program
US10493576B2 (en) 2016-08-09 2019-12-03 Fanuc Corporation Servo control device, spindle failure detection method using servo control device, and non-transitory computer readable medium encoded with computer program
WO2023167059A1 (en) * 2022-03-01 2023-09-07 シチズン時計株式会社 Machine tool
CN114986254A (en) * 2022-06-28 2022-09-02 大众一汽发动机（大连）有限公司 Numerical control machine tool electric spindle pad scrap detection method
CN114986254B (en) * 2022-06-28 2023-06-09 大众一汽发动机（大连）有限公司 Method for detecting electric spindle pad scraps of numerical control machine tool

Also Published As

Publication number Publication date
JPS5830107B2 (en) 1983-06-27

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