JPS61274849A - Method of detecting breakage of drill - Google Patents

Method of detecting breakage of drill

Info

Publication number
JPS61274849A
JPS61274849A JP60117603A JP11760385A JPS61274849A JP S61274849 A JPS61274849 A JP S61274849A JP 60117603 A JP60117603 A JP 60117603A JP 11760385 A JP11760385 A JP 11760385A JP S61274849 A JPS61274849 A JP S61274849A
Authority
JP
Japan
Prior art keywords
drill
displacement detector
voltage signal
comparator
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.)
Pending
Application number
JP60117603A
Other languages
Japanese (ja)
Inventor
Teruaki Fujiwara
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 House Industrial Co Ltd
Original Assignee
National House Industrial 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 National House Industrial Co Ltd filed Critical National House Industrial Co Ltd
Priority to JP60117603A priority Critical patent/JPS61274849A/en
Publication of JPS61274849A publication Critical patent/JPS61274849A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09Arrangements 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
    • B23Q17/0952Arrangements 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 during machining
    • B23Q17/0957Detection of tool breakage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B49/00Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
    • B23B49/001Devices for detecting or indicating failure of drills

Abstract

PURPOSE:To prevent an inferior product from being manufactured due to the breakage of a drill by detecting the side run-out displacement of said drill by counting the number of times at which the voltage signal of a displacement detector has exceeded a set voltage value, and stopping the operation of said drill when said number of times has exceeded a set number of times. CONSTITUTION:A displacement detector 2 is provided close to a drill 1. The voltage signal V of the displacement detector 2 is amplified by a detector amplifier 7 and inputted in a comparator 3. When a frame 8 and a surface board 9 are carried in and as the drill 1 is lowered reaching the surface board 9, a limit switch 5 is turned on to make the comparator 3, displacement detector 2, etc. start operating. The displacement detector 2 detects the side run-out of the drill 1, and sends the size of the side run-out, as a voltage signal V, to the comparator 3, which, in turn, counts the number of times N at which the voltage signal V becomes larger than a set voltage value V0 within a certain sampling time. When the counted number is N<N0, it gives an OK signal while, when N>N0,it gives an NG signal, lifting up the drill 1 and stopping the operation of the drill 1.
JP60117603A 1985-05-30 1985-05-30 Method of detecting breakage of drill Pending JPS61274849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60117603A JPS61274849A (en) 1985-05-30 1985-05-30 Method of detecting breakage of drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60117603A JPS61274849A (en) 1985-05-30 1985-05-30 Method of detecting breakage of drill

Publications (1)

Publication Number Publication Date
JPS61274849A true JPS61274849A (en) 1986-12-05

Family

ID=14715874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60117603A Pending JPS61274849A (en) 1985-05-30 1985-05-30 Method of detecting breakage of drill

Country Status (1)

Country Link
JP (1) JPS61274849A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013132732A (en) * 2011-12-27 2013-07-08 Jfe Steel Corp Method and device for detecting damage on tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013132732A (en) * 2011-12-27 2013-07-08 Jfe Steel Corp Method and device for detecting damage on tool

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