JPS56139856A - Threshold value setting method of tool abnormality detector - Google Patents

Threshold value setting method of tool abnormality detector

Info

Publication number
JPS56139856A
JPS56139856A JP3949780A JP3949780A JPS56139856A JP S56139856 A JPS56139856 A JP S56139856A JP 3949780 A JP3949780 A JP 3949780A JP 3949780 A JP3949780 A JP 3949780A JP S56139856 A JPS56139856 A JP S56139856A
Authority
JP
Japan
Prior art keywords
threshold value
abnormality detector
tool
value setting
setting method
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
JP3949780A
Other languages
Japanese (ja)
Inventor
Hideyuki Wakai
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 JP3949780A priority Critical patent/JPS56139856A/en
Priority to GB8109126A priority patent/GB2075875B/en
Priority to DE19813111425 priority patent/DE3111425A1/en
Priority to US06/247,233 priority patent/US4456960A/en
Publication of JPS56139856A publication Critical patent/JPS56139856A/en
Priority to GB08304276A priority patent/GB2118074B/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
    • 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

Landscapes

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

Abstract

PURPOSE:To set automatically a threshold value with a tool abnormality detector, by comparing a preset threshold value with input data varying in accordance with the state of a tool. CONSTITUTION:First, an abnormality detector 10 discriminates whether a threshold setting switch 11 is turned on or not. If the switch 11 is ON, output of a machine tool is used for determining and setting a threshold value on the base of input stored in a memory 104, until the switch 11 is turned off. This operation is repeated as much times as the number of samples. The maximum value among these arithmetic data is increased by 10% to set the final threshold value.
JP3949780A 1980-03-27 1980-03-27 Threshold value setting method of tool abnormality detector Pending JPS56139856A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP3949780A JPS56139856A (en) 1980-03-27 1980-03-27 Threshold value setting method of tool abnormality detector
GB8109126A GB2075875B (en) 1980-03-27 1981-03-24 Method and device for detecting tool abnormality in machine tools
DE19813111425 DE3111425A1 (en) 1980-03-27 1981-03-24 METHOD AND DEVICE FOR DETERMINING ABNORMAL INTERFERENCE SIZES WHEN OPERATING A MACHINE TOOL
US06/247,233 US4456960A (en) 1980-03-27 1981-03-25 Method and device for detecting tool abnormality in machine tools
GB08304276A GB2118074B (en) 1980-03-27 1983-02-16 Method and device for detecting tool abnormality in numerically controlled machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3949780A JPS56139856A (en) 1980-03-27 1980-03-27 Threshold value setting method of tool abnormality detector

Publications (1)

Publication Number Publication Date
JPS56139856A true JPS56139856A (en) 1981-10-31

Family

ID=12554677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3949780A Pending JPS56139856A (en) 1980-03-27 1980-03-27 Threshold value setting method of tool abnormality detector

Country Status (1)

Country Link
JP (1) JPS56139856A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0516051A (en) * 1991-03-20 1993-01-26 Mitsubishi Electric Corp Automatic workpiece changer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51122881A (en) * 1975-04-18 1976-10-27 Shin Nippon Koki Kk Feed speed control for machine tools
JPS5531541A (en) * 1978-08-23 1980-03-05 Toshiba Mach Co Ltd Abnormality detecting system for cutting tool

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51122881A (en) * 1975-04-18 1976-10-27 Shin Nippon Koki Kk Feed speed control for machine tools
JPS5531541A (en) * 1978-08-23 1980-03-05 Toshiba Mach Co Ltd Abnormality detecting system for cutting tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0516051A (en) * 1991-03-20 1993-01-26 Mitsubishi Electric Corp Automatic workpiece changer

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