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Title:
DRILL BREAKING DETECTING METHOD
Document Type and Number:
Japanese Patent JPS62277246
Kind Code:
A
Abstract:

PURPOSE: To enable a breaking AE signal to be positively arrested instantly before it is damped by connecting a pressor member of a printed substrate with an AE sensor mounted on a stationary member which is held in a condition separated from a boring machine, with a flexible conductor.

CONSTITUTION: When a drill 5 is broken during drilling, AE waves produced by drill breaking are transferred from a breakage to a printed substrate 1 and to a pressor member 3. And AE waves between the pressor member 3 and a stationary member 6 are transferred to the stationary member via a flexible conductor without being damped. And they are transferred from a holder 8 further down to an AE sensor 7 so as to be inputted into a signal processing circuit 10 for outputting a drill breaking signal. Owing to this constitution, a breaking AE signal can be positively arrested instantly before it is damped.


Inventors:
TAKANO TSUTOMU
SAITO HIDEO
HORIUCHI YOSHIYUKI
Application Number:
JP1986000116248
Publication Date:
December 02, 1987
Filing Date:
May 22, 1986
Export Citation:
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Assignee:
NACHI FUJIKOSHI CORP
International Classes:
B23B49/00; B23Q17/09; B23Q17/12; H05K3/00; (IPC1-7): B23B49/00; B23Q17/09
Domestic Patent References:
JPH0677895A1994-03-18
JPS6161112U1986-04-24
JPS6116027U1986-01-30
JPH0410992U1992-01-29
JPS59175940A1984-10-05
JPS6034252A1985-02-21
JPS6280555A1987-04-14