JPS5673345A - Abnormality detecting device for cutting tool - Google Patents
Abnormality detecting device for cutting toolInfo
- Publication number
- JPS5673345A JPS5673345A JP15037479A JP15037479A JPS5673345A JP S5673345 A JPS5673345 A JP S5673345A JP 15037479 A JP15037479 A JP 15037479A JP 15037479 A JP15037479 A JP 15037479A JP S5673345 A JPS5673345 A JP S5673345A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- enters
- output
- reference signal
- compared
- 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
Links
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Abstract
PURPOSE: To reduce erronous signal by a method wherein a signal of 1Hz or less of an acoustic emission (AE) during a cutting work is picked up, and a reference signal which is obtained by adding a proper bias signal to the aforementioned signal is compared with an envelope detection of the AE signal, and if it exceeds a reference signal, an abnormality information signal is sent out.
CONSTITUTION: The acoustic emission (AE) during cutting work is detected through an AE sensor 1, passes through an amplifier 2, an absolute value amplifier 3 and enters an LPF4 having a cut off of for example, 1Hz. And it is output from the LPF4 as a signal B indicating a break state of a chip and is entered into an adder 5 wherein a proper bias D is added to become a comparison reference signal E, then, this signal enters a comparator 7. Whereas, an AE signal output from an absolute value amplifier 3 passes through an LPF having a cut off of 1kHz, becomes an envelope detection signal C of the AE signal, enters the comparator 7 to be compared with the reference signal E. And if the compared result exceeds an E, an abnormality information signal F is output. With this, erronous signals can be reduced.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15037479A JPS5673345A (en) | 1979-11-20 | 1979-11-20 | Abnormality detecting device for cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15037479A JPS5673345A (en) | 1979-11-20 | 1979-11-20 | Abnormality detecting device for cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5673345A true JPS5673345A (en) | 1981-06-18 |
Family
ID=15495587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15037479A Pending JPS5673345A (en) | 1979-11-20 | 1979-11-20 | Abnormality detecting device for cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5673345A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0354435A (en) * | 1989-07-21 | 1991-03-08 | Tochigi Pref Gov | Method and apparatus for predicting abrasion and damage of machine tool |
| JPH06262493A (en) * | 1993-03-15 | 1994-09-20 | Tochigi Pref Gov | Method for deciding too life by ae and device executing this method and automatic tool change system utilizing these method and device |
-
1979
- 1979-11-20 JP JP15037479A patent/JPS5673345A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0354435A (en) * | 1989-07-21 | 1991-03-08 | Tochigi Pref Gov | Method and apparatus for predicting abrasion and damage of machine tool |
| JPH06262493A (en) * | 1993-03-15 | 1994-09-20 | Tochigi Pref Gov | Method for deciding too life by ae and device executing this method and automatic tool change system utilizing these method and device |
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