JPH057138B2 - - Google Patents
Info
- Publication number
- JPH057138B2 JPH057138B2 JP59101554A JP10155484A JPH057138B2 JP H057138 B2 JPH057138 B2 JP H057138B2 JP 59101554 A JP59101554 A JP 59101554A JP 10155484 A JP10155484 A JP 10155484A JP H057138 B2 JPH057138 B2 JP H057138B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- tool
- pseudo
- level
- sensor
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 24
- 230000010355 oscillation Effects 0.000 claims description 11
- 230000003321 amplification Effects 0.000 description 8
- 238000003199 nucleic acid amplification method Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Classifications
-
- 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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
- G05B19/4065—Monitoring tool breakage, life or condition
-
- 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
- G05B2219/37032—Generate vibrations, ultrasound
-
- 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
- G05B2219/37242—Tool signature, compare pattern with detected signal
-
- 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
- G05B2219/37351—Detect vibration, ultrasound
-
- 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
- G05B2219/37493—Use of different frequency band pass filters to separate different signals
-
- 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
- G05B2219/37498—Variable amplification, gain for detected signal, select correct level range
-
- 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
- G05B2219/37536—Rate of change, derivative
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Description
【発明の詳細な説明】
発明の分野
本発明は工作機械における工具の折損を折損時
に発生するアコーステイツクエミツシヨン（以下
AEという）を利用して検出する工具折損検出装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an acoustic emission (hereinafter referred to as
This relates to a tool breakage detection device that uses AE (AE) to detect tool breakage.
従来技術とその問題点
工作機械、例えばボール盤等は自動運転させる
ことが多いが、ボール盤のドリルの刃が折損する
ことがしばしばあり、そのような場合には何らか
の方法で折損を検出する必要がある。こうした工
作機械の工具の折損を検出する一手法として、従
来より工作機械の工具やワークの近傍にAEセン
サを設け、そこから得られるAE信号に基づいて
工具の折損を検出している。Conventional technology and its problems Machine tools, such as drilling machines, are often operated automatically, but the drill bit of the drilling machine often breaks, and in such cases, it is necessary to detect the breakage in some way. . One way to detect tool breakage in machine tools is to install an AE sensor near the tool or workpiece of the machine tool, and detect tool breakage based on the AE signal obtained from the AE sensor.
ところで従来の工具折損検出装置によれば、
AEセンサより得られる信号を適宜増幅し、増幅
出力を所定のスレツシユホールドレベルで弁別し
て工具の折損信号としている。ここでAEセンサ
は工具の近傍やワーク等に接触するように取付ら
れるが、その取付位置によつてAE信号レベルが
大幅に異なることが知られている。そしてAEセ
ンサを工作機械の任意の位置に取付ると、AEセ
ンサから工具とワークとの摩擦や切り屑等の発生
によつて比較的高レベルのAE信号が得られるこ
とがあり、これらと区別して工具の折損を検出す
るために検出レベルを適正に調整する必要があ
る。そしてこの検出レベルの調整はAE信号増幅
器の増幅度や検出のスレツシユホールドレベルを
調整することによつて行つている。しかしながら
AEセンサの取付位置や取付状態等によつてAE信
号レベルが大幅に異なり、しかも工具の折損時の
AE信号は折損時しか得られないのでAEセンサの
取付位置や取付状態の確認が難しく、言わば手探
り状態でAEセンサを取付けていた。更にAEセン
サより得られるAE信号増幅器の増幅度やスレツ
シユホールドレベルは、AEセンサの取付状態と
かかわりなく定めていたためそれらを正しく設定
することは極めて困難であつた。更に工具の種
類、例えばドリル径を変更した時や回転速度等の
切削条件を異ならせたときにもAE信号レベルが
異なるため、調整が困難であり使い難く信頼性に
問題があるという欠点があつた。 However, according to the conventional tool breakage detection device,
The signal obtained from the AE sensor is appropriately amplified, and the amplified output is discriminated at a predetermined threshold level to be used as a tool breakage signal. Here, the AE sensor is mounted near the tool or in contact with the workpiece, etc., and it is known that the AE signal level varies greatly depending on the mounting position. If the AE sensor is installed at any position on the machine tool, a relatively high level AE signal may be obtained from the AE sensor due to friction between the tool and workpiece or generation of chips, etc. Separately, it is necessary to appropriately adjust the detection level to detect tool breakage. The detection level is adjusted by adjusting the amplification degree of the AE signal amplifier and the detection threshold level. however
The AE signal level varies greatly depending on the mounting position and mounting condition of the AE sensor, and moreover,
Since the AE signal can only be obtained when the product is broken, it is difficult to confirm the installation position and installation condition of the AE sensor, so the AE sensor was installed without much effort. Furthermore, since the amplification degree and threshold level of the AE signal amplifier obtained from the AE sensor were determined regardless of the mounting state of the AE sensor, it was extremely difficult to set them correctly. Furthermore, the AE signal level differs when the type of tool is changed, for example when the drill diameter is changed or when the cutting conditions such as rotation speed are changed, making adjustment difficult, making it difficult to use and causing reliability problems. Ta.
発明の目的
本発明はこのような従来の工具折損検出装置の
問題点に鑑みてなされたものであつて、工具折損
時のAE信号発生器を用いて擬似AE信号を発生さ
せAEセンサの適切な設置位置や増幅率等を設定
すると共に、その動作を確認することができる工
具折損検出装置を提供することを目的とする。Purpose of the Invention The present invention has been made in view of the problems of the conventional tool breakage detection device, and the present invention is to generate a pseudo AE signal using an AE signal generator when a tool breaks, and to detect the appropriate detection of the AE sensor. It is an object of the present invention to provide a tool breakage detection device that allows setting the installation position, amplification factor, etc., and confirming its operation.
発明の構成と効果
本発明は工作機械の工具近傍に設けられたAE
センサと、該AEセンサの出力を増幅する増幅器
を有し、工具の折損時に得られるAE信号に基づ
いて折損を検出する工具折損検出装置であつて、
工具の折損時に得られるAE信号の周波数を含む
擬似AE信号を発生する擬似AE信号発生手段と、
擬似AE信号発生手段の発振レベルを設定するレ
ベル設定手段と、工作機械のワークに接触させて
配置し、擬似AE信号発生手段によつて駆動され
て擬似AE信号をワークに伝えるAE発振素子と、
を具備することを特徴とするものである。Structure and Effects of the Invention The present invention provides an AE installed near the tool of a machine tool.
A tool breakage detection device that includes a sensor and an amplifier that amplifies the output of the AE sensor, and detects breakage based on an AE signal obtained when a tool breaks,
pseudo AE signal generating means for generating a pseudo AE signal including the frequency of the AE signal obtained when the tool breaks;
a level setting means for setting an oscillation level of the pseudo AE signal generation means; an AE oscillation element disposed in contact with a workpiece of a machine tool and driven by the pseudo AE signal generation means to transmit a pseudo AE signal to the workpiece;
It is characterized by comprising the following.
このような特徴を有する本発明によれば、工作
機械による工作を行う前に擬似AE信号発生手段
により工具の折損時の擬似AE信号を発生させて
AE信号の受波レベルを求めている。従つてAEセ
ンサの取付位置や取付状態を正しく設定すること
が可能となる。又その擬似AE信号によつて増幅
度やスレツシユホールドレベルを適宜調整して工
具折損の検知動作を確認することが可能である。
従つて工具折損の信号の信頼性を向上させること
ができ使い易い工具折損検出装置とすることがで
きる。 According to the present invention having such characteristics, a pseudo AE signal generated when a tool breaks is generated by a pseudo AE signal generating means before machining is performed using a machine tool.
I am looking for the reception level of the AE signal. Therefore, it is possible to correctly set the mounting position and mounting state of the AE sensor. Furthermore, it is possible to check the tool breakage detection operation by appropriately adjusting the amplification degree and threshold level using the pseudo AE signal.
Therefore, the reliability of the tool breakage signal can be improved, and the tool breakage detection device can be made easy to use.
実施例の説明
第１図は本発明による工具折損検出装置の一実
施例を示すブロツク図である。本図においてワー
ク１はボール盤のベース上に固定されており、ワ
ーク１の上部よりドリル２を回転させて所定速度
で押下しワーク１に開口を設ける。ここでワーク
１の上部のドリルの刃が接触する位置にワークに
切削を行う前にあらかじめAEセンサと同じく
PZT等からなるAE発振素子３を取付ける。この
AE発振素子３にはレベル設定器４によつて設定
されるレベルに従つて所定範囲の周波数、例えば
100〜300KHzの間の周波数を連続的に発振するス
イープ発振器５が接続され、このスイープ発振器
５によつて駆動される。そしてワーク１が配置さ
れる工具の近傍、例えば第１図に示すようにベー
ス上にAE信号を検出するAEセンサ６を設ける。
AEセンサ６は例えば1KHzから1MHz程度の広帯
域のAE信号を検出するものであつて、その出力
は増幅器７に与えられる。増幅器７は可変抵抗器
８の調整により増幅率を任意に設定することがで
きる増幅器であつて、その出力をバンドパスフイ
ルタ９と表示器駆動用の増幅器１０に与えるもの
である。この増幅器７より得られるAE信号の周
波数成分は、切り屑等が生じない通常の切削時に
は100KHz以下でピーク値を有し高い周波数まで
の周波数成分を有する信号であり、ドリル２の折
損時や切り屑等が発生したときには200KHz付近
にピーク値を有する信号となつている。従つてバ
ンドパスフイルタ９はドリル２の折損時に発生す
るAE信号の周波数、例えば100〜300KHz程度の
信号を通過させるフイルタとする。バンドパスフ
イルタ９の出力は比較器１１とAE信号レベルを
表示する表示器１２に与えられる。比較器１１は
バンドパスフイルタ９より得られるAE信号を所
定の基準値レベルと比較してそのレベル以上の信
号が与えられたときに折損信号を出力するもので
あつて、検知信号を折損表示器１３に与える。又
表示器１２は動作中に切り屑や摩擦等によつてバ
ンドパスフイルタ９を通過するAE信号を表示す
る表示器であり、更に増幅路１０の出力は表示器
１４に与えられ常に切削中の信号が表示されてい
る。DESCRIPTION OF EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a tool breakage detection device according to the present invention. In this figure, a workpiece 1 is fixed on the base of a drilling machine, and a drill 2 is rotated from above the workpiece 1 and pushed down at a predetermined speed to form an opening in the workpiece 1. Here, before cutting the workpiece at the position where the drill bit on the upper part of workpiece 1 comes into contact with the AE sensor,
Attach the AE oscillation element 3 made of PZT or the like. this
The AE oscillation element 3 has a frequency within a predetermined range, for example, according to the level set by the level setter 4.
A sweep oscillator 5 that continuously oscillates a frequency between 100 and 300 KHz is connected and driven by the sweep oscillator 5. An AE sensor 6 for detecting an AE signal is provided near the tool on which the workpiece 1 is placed, for example, on the base as shown in FIG.
The AE sensor 6 detects a wide band AE signal of, for example, about 1 KHz to 1 MHz, and its output is given to an amplifier 7. The amplifier 7 is an amplifier whose amplification factor can be arbitrarily set by adjusting a variable resistor 8, and its output is given to a bandpass filter 9 and an amplifier 10 for driving a display. The frequency component of the AE signal obtained from this amplifier 7 is a signal that has a peak value of 100KHz or less during normal cutting without chips etc., and has a frequency component up to a high frequency, and when the drill 2 breaks or when cutting When debris is generated, the signal has a peak value around 200KHz. Therefore, the bandpass filter 9 is a filter that passes the frequency of the AE signal generated when the drill 2 breaks, for example, a signal of about 100 to 300 KHz. The output of the bandpass filter 9 is given to a comparator 11 and a display 12 that displays the AE signal level. The comparator 11 compares the AE signal obtained from the bandpass filter 9 with a predetermined reference value level, and outputs a breakage signal when a signal higher than that level is given, and outputs a breakage signal by transmitting the detection signal to a breakage indicator. Give to 13. In addition, the display 12 is a display that displays the AE signal that passes through the bandpass filter 9 due to chips, friction, etc. during operation, and the output of the amplifier path 10 is given to the display 14 so that it always shows the signal during cutting. A signal is displayed.
次に本実施例の工具折損検出装置においてAE
センサを設置した時の操作について説明する。ま
ず工具の種類、例えばドリルの刃を適宜変更する
ものとするとそのドリル径1φ〜3φに夫々に対応
した切り屑等のAE信号レベルは、第２図に示す
レベルＬ１〜Ｌ３のようにあらかじめ定められて
いる。従つて例えば1φのドリルを用いる場合に
は第２図より設定値Ｌ１となるようにレベル設定
器４を操作してスイープ発振器５の発振レベルを
設定する。そしてスイープ発振器５を断続的に駆
動しAEパルス発振素子３を通じて擬似AE信号を
ワーク１に与える。 Next, in the tool breakage detection device of this example, AE
We will explain the operation when installing the sensor. First, if the type of tool, for example, the drill bit, is changed as appropriate, the AE signal level of chips, etc. corresponding to the drill diameter of 1φ to 3φ is predetermined as levels L1 to L3 shown in Fig. 2. It is being Therefore, when using a 1φ drill, for example, the level setter 4 is operated to set the oscillation level of the sweep oscillator 5 so that the set value L1 is obtained as shown in FIG. Then, the sweep oscillator 5 is intermittently driven to give a pseudo AE signal to the workpiece 1 through the AE pulse oscillation element 3.
第３図(a)はスイープ発振器５によつて発振され
る擬似AE信号を示す波形図である。このように
所定周期毎に断続的に100〜300KHzの範囲の擬似
AE信号が与えられると、AEセンサ６よりAE信
号が取出され増幅器７によつて増幅されてバンド
パスフイルタ９に与えられる。ここでスイーブ発
振器５の周波数はあらかじめ工具折損時のAE信
号の周波数に相当する100〜300KHzの周波数であ
るので、その信号はバンドパスフイルタ９を通過
し表示器１２と比較器１１に与えられる。従つて
表示器１２のレベルが適正となるようにAEセン
サ６の取付場所や取付状態、及び増幅器７の増幅
率を可変抵抗器８によつて調整する。ここでスイ
ープ発振器５より発振される擬似AE信号のレベ
ルは工具の折損時のAE信号レベルに等しいので、
比較器１１のスレツシユホールドレベルはこのと
き与えられるAE信号レベルよりも十分高くなる
ように設定しておく。例えば第３図ｂに示すよう
にバンドパスフイルタ９を通つて得られるAE信
号がスレツシユホールドレベルＳより低い場合に
は、AEセンサ６の取付位置をワーク１に近づけ
たりワークのベースに密接させて固定し、更には
増幅器７の増幅率を上昇させるといつた調整を行
い、第３図ｃに示すように受波AE信号がスレツ
シユホールドレベルよりも高く設定する。そうす
ればこの工具折損検出装置は正しく調整されたこ
ととなる。 FIG. 3(a) is a waveform diagram showing a pseudo AE signal oscillated by the sweep oscillator 5. In this way, the pseudo
When the AE signal is applied, the AE signal is extracted from the AE sensor 6, amplified by the amplifier 7, and applied to the bandpass filter 9. Here, since the frequency of the sweep oscillator 5 is in advance a frequency of 100 to 300 KHz corresponding to the frequency of the AE signal at the time of tool breakage, the signal passes through the band pass filter 9 and is given to the indicator 12 and comparator 11. Therefore, the mounting location and mounting state of the AE sensor 6 and the amplification factor of the amplifier 7 are adjusted by the variable resistor 8 so that the level of the indicator 12 is appropriate. Here, the level of the pseudo AE signal oscillated by the sweep oscillator 5 is equal to the AE signal level when the tool breaks, so
The threshold level of the comparator 11 is set to be sufficiently higher than the AE signal level applied at this time. For example, as shown in Fig. 3b, if the AE signal obtained through the bandpass filter 9 is lower than the threshold level S, the mounting position of the AE sensor 6 should be moved closer to the workpiece 1 or closer to the base of the workpiece. The received AE signal is set to be higher than the threshold level as shown in FIG. This means that the tool breakage detection device has been correctly adjusted.
この調整を終えた後ワーク１よりAE信号発振
素子３を外してドリルを回転させてワーク１を切
削する。こうすればAEセンサ６の位置や増幅器
７の増幅率及び比較器１１のスレツシユホールド
レベルが正しく設定されているので、切り屑や摩
擦等によつて得られるAE信号によつて誤動作す
ることなく、ドリル２の折損によつて確実にAE
信号を得ることが可能となる。又工具、例えばド
リル２の口径を例えば3φに変更した場合には、
第２図に示すようにレベル設定器４を用いてレベ
ルＬ１よりも高いレベルＬ３に設定した状態で
AE発振素子３をワーク１に取付け、スイープ発
振器５を駆動して断続する擬似AE信号をワーク
１に与える。ドリル径の交換だけでなくドリルの
送り速度や回転速度、ワークの種類等を切削条件
を変更した場合には、夫々に対応する擬似AE信
号レベルをレベル設定器４により設定し、AEセ
ンサ６の位置や取付状態及び増幅器７の増幅率を
変更することによつて常に正しい状態で工具折損
検出装置を動作させることが可能となる。 After completing this adjustment, the AE signal oscillation element 3 is removed from the work 1 and the drill is rotated to cut the work 1. By doing this, the position of the AE sensor 6, the amplification factor of the amplifier 7, and the threshold level of the comparator 11 are set correctly, so that malfunctions due to AE signals obtained from chips, friction, etc. will not occur. , the breakage of drill 2 will definitely cause AE.
It becomes possible to obtain a signal. Also, if the diameter of the tool, for example drill 2, is changed to 3φ,
As shown in Figure 2, with the level setter 4 set to level L3 higher than level L1,
The AE oscillation element 3 is attached to the workpiece 1, and the sweep oscillator 5 is driven to give an intermittent pseudo AE signal to the workpiece 1. When not only changing the drill diameter but also changing the cutting conditions such as drill feed rate, rotation speed, workpiece type, etc., set the corresponding pseudo AE signal level using the level setter 4, and adjust the AE sensor 6. By changing the position, mounting condition, and amplification factor of the amplifier 7, it is possible to always operate the tool breakage detection device in the correct state.
尚本実施例は100〜300KHzの周波数を連続的に
発振するスイープ発振器５を用いて擬似AE信号
としているが、工具の折損に等しい一様な周波数
を有するノイズ発振器等を用いてAE発振器を駆
動するように構成することも可能である。 Although this embodiment uses a sweep oscillator 5 that continuously oscillates a frequency of 100 to 300 KHz to generate a pseudo AE signal, it is also possible to drive the AE oscillator using a noise oscillator or the like having a uniform frequency equal to that of tool breakage. It is also possible to configure it to do so.
又本実施例はボール盤のドリル折損検出装置に
ついて説明しているが、本発明は他の工作機械、
例えば施盤やフライス盤等の種々の工作機械に適
用することが可能である。 Further, although this embodiment describes a drill breakage detection device for a drilling machine, the present invention can also be applied to other machine tools,
For example, it can be applied to various machine tools such as lathes and milling machines.
第１図は本発明による工具折損検出装置の一実
施例を示すブロツク図、第２図は異なるドリル径
を用いる際に設定される擬似AE信号のレベルを
示すグラフ、第３図はAE信号発振器に与える擬
似AE信号とその信号によつてAEセンサより得ら
れるAE検出信号を示すグラフである。
１……ワーク、２……ドリル、３……AE発振
素子、４……レベル設定器、５……スイープ発振
器、６……AEセンサ、７……増幅器、８……可
変抵抗器、９……バンドパスフイルタ、１１……
比較器、１２……AE信号表示器、１３……折損
表示器。
Fig. 1 is a block diagram showing an embodiment of the tool breakage detection device according to the present invention, Fig. 2 is a graph showing the level of the pseudo AE signal set when using different drill diameters, and Fig. 3 is the AE signal oscillator. 3 is a graph showing a pseudo AE signal given to the AE sensor and an AE detection signal obtained from the AE sensor using the pseudo AE signal. 1... Work, 2... Drill, 3... AE oscillation element, 4... Level setter, 5... Sweep oscillator, 6... AE sensor, 7... Amplifier, 8... Variable resistor, 9... ...Band pass filter, 11...
Comparator, 12...AE signal indicator, 13...Breakage indicator.
Claims (1)
と、該AEセンサの出力を増幅する増幅器を有し、
工具の折損時に得られるAE信号に基づいて折損
を検出する工具折損検出装置において、 工具の折損時に得られるAE信号の周波数を含
む擬似AE信号を発生する擬似AE信号発生手段
と、 前記擬似AE信号発生手段の発振レベルを設定
するレベル設定手段と、 工作機械のワークに接触させて配置し、前記擬
似AE信号発生手段によつて駆動されて擬似AE信
号をワークに伝えるAE発振素子と、を具備する
ことを特徴とする工具折損検出装置。 ２ 前記擬似AE信号発生手段は、工具折損時の
AE信号の周波数を含む範囲の周波数を連続して
発振するスイープ発振器であることを特徴とする
特許請求の範囲第１項記載の工具折損検出装置。 ３ 前記擬似AE信号発生手段は、工具折損時の
AE信号の周波数を含むノイズを発振するノイズ
発振器であることを特徴とする特許請求の範囲第
１項記載の工具折損検出装置。[Claims] 1. An AE sensor provided near a tool of a machine tool, and an amplifier that amplifies the output of the AE sensor,
A tool breakage detection device that detects breakage based on an AE signal obtained when a tool breaks, comprising: pseudo AE signal generating means for generating a pseudo AE signal including a frequency of an AE signal obtained when a tool breaks; and the pseudo AE signal. A level setting means for setting an oscillation level of the generating means; and an AE oscillation element disposed in contact with a workpiece of a machine tool and driven by the pseudo AE signal generating means to transmit a pseudo AE signal to the workpiece. A tool breakage detection device characterized by: 2 The pseudo AE signal generating means is configured to generate a signal when the tool breaks.
2. The tool breakage detection device according to claim 1, wherein the tool breakage detection device is a sweep oscillator that continuously oscillates a frequency in a range including the frequency of the AE signal. 3 The pseudo AE signal generating means is configured to generate a signal when the tool breaks.
The tool breakage detection device according to claim 1, characterized in that it is a noise oscillator that oscillates noise including the frequency of the AE signal.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59101554A JPS60244859A (en) | 1984-05-18 | 1984-05-18 | Detecting device of broken tool |
| US06/734,679 US4918616A (en) | 1984-05-18 | 1985-05-16 | Tool monitoring system |
| KR1019850003399A KR900007293B1 (en) | 1984-05-18 | 1985-05-17 | Tool monitoring system |
| AT85106105T ATE46777T1 (en) | 1984-05-18 | 1985-05-17 | TOOL MONITORING SYSTEM. |
| DE8585106105T DE3573333D1 (en) | 1984-05-18 | 1985-05-17 | Tool monitoring system |
| EP85106105A EP0165482B1 (en) | 1984-05-18 | 1985-05-17 | Tool monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59101554A JPS60244859A (en) | 1984-05-18 | 1984-05-18 | Detecting device of broken tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60244859A JPS60244859A (en) | 1985-12-04 |
| JPH057138B2 true JPH057138B2 (en) | 1993-01-28 |
Family
ID=14303636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59101554A Granted JPS60244859A (en) | 1984-05-18 | 1984-05-18 | Detecting device of broken tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60244859A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH069765B2 (en) * | 1985-01-29 | 1994-02-09 | オムロン株式会社 | Pseudo breakage signal generator |
| CN107533325B (en) * | 2016-03-16 | 2020-01-21 | 三菱电机株式会社 | Mechanical motion track measuring device |
-
1984
- 1984-05-18 JP JP59101554A patent/JPS60244859A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60244859A (en) | 1985-12-04 |
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