JPS5828451A - Method of sensing failures at the tip of cutting tool - Google Patents
Method of sensing failures at the tip of cutting toolInfo
- Publication number
- JPS5828451A JPS5828451A JP12445881A JP12445881A JPS5828451A JP S5828451 A JPS5828451 A JP S5828451A JP 12445881 A JP12445881 A JP 12445881A JP 12445881 A JP12445881 A JP 12445881A JP S5828451 A JPS5828451 A JP S5828451A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- tool
- cutting
- damage
- tip
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 230000003321 amplification Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 1
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
- B23Q17/0952—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 during machining
- B23Q17/0971—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 during machining by measuring mechanical vibrations of parts of the machine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
この発明は工作機械等において被加工物を旋削加工する
際に使用する切削工具の刃先の損傷や寿命を検出する方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting damage and life of a cutting tool used when turning a workpiece in a machine tool or the like.
近年、各種工作機械の自動化、無人化が進み、特に最近
では高能率化、高精度化を目指す技術開発が盛んに行わ
れている。In recent years, various machine tools have become increasingly automated and unmanned, and in particular, technological development aimed at increasing efficiency and precision has been actively carried out.
このような状況下にあって工作機械の能率、Ｓ度の向上
を妨げているのは、切削工具の損傷状態や寿命を容易に
感知することができないためである。切削工具の損傷や
摩耗が進んでもはや寿命の状態になった場合に、無人化
された工作機械にあってはこれが感知できないとなると
、被加工物の仕上や不良を多量に生じた秒、９次的には
工作機械自体の一部を破壊してしまうという事態を起し
かねない。Under such circumstances, the reason why the efficiency and S degree of machine tools cannot be improved is that it is not possible to easily detect the damage state and lifespan of cutting tools. If a cutting tool becomes damaged or worn and reaches the end of its lifespan, unmanned machine tools cannot detect this, resulting in a large number of defects in the finish of the workpiece. Next, there is a possibility that a part of the machine tool itself may be destroyed.
従来はこのような問題をｆ然に防ぐために作業者が時々
工具刃先の形状を監視しては工具の交換を行うというこ
とを実溜していた。In the past, in order to prevent such problems from occurring, the operator had to occasionally monitor the shape of the cutting edge of the tool and replace the tool.
また、このような工具の摩耗や折損などを検出する方法
として直接的あるいは間接的に特定の現象をつかんで判
定することも検討されている。In addition, as a method for detecting such wear and breakage of tools, methods of directly or indirectly grasping and determining specific phenomena are also being considered.
その１つとしてアコースティックエ電ツション＠ｃｏｕ
ｓｔｉｃＢｎ１ｍｓｉｏ４信号（以下単にＡＥ信号と略
記する）を利用する方法が提案されているが、未だ実用
化されるまでには至っていない。One of them is acoustic music @cou.
Although a method using the sticBn1msio4 signal (hereinafter simply abbreviated as AE signal) has been proposed, it has not yet been put into practical use.
その理由としては、特定のノイズ（切削屑など）をＡＥ
儒号の中で完全に欠損信号と区別して除去する方法が見
出されていないためと考えられる。The reason for this is that certain noises (cutting debris, etc.)
This is thought to be because no method has been found to completely distinguish and eliminate the missing signal in the Confucian code.
本発明者らは上記のようなＡＩ信号を利用した工具刃先
の損傷検出法にあって、ノイズの中でも特に大きな切削
屑による影響を皆無もしくは最少限にとどめる方法につ
いて検討した結果、ＡＥ倍信号検知するＡＩＣセンサー
を、回転する被削材のチャック側端ＷｉＫ設置すればよ
いことを見出し、この発明に至ったものである。The present inventors investigated a method for detecting damage to a tool cutting edge using AI signals as described above, and found that the influence of cutting chips, which is particularly large among noise, can be eliminated or minimized. The inventors have discovered that it is sufficient to install an AIC sensor at the chuck side end WiK of the rotating workpiece, leading to the present invention.
以下図面を参照してこの発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.
ｔｌＩｉ１図はチャック５にて固定した被削材２のチャ
ック側端面ＫＡＥセンサー発信セットｌを設置した切刺
工＾の模式図であって、乙のＡＥセンサー発発信セット
空中は、ＡＥＥセンサー増巾器、小型無線発信器や電源
が内蔵されている。Figure tlIi1 is a schematic diagram of a cutting machine with a KAE sensor transmission set l installed on the end surface of the chuck side of a workpiece 2 fixed with a chuck 5, and the AE sensor transmission set in the middle is the AEE sensor widening. It has a built-in device, a small wireless transmitter, and a power source.
そしてチャック爪番によってチャック６に固定され、矢
印方向に１転している被削材２を８のチップ（工具刃先
）で切削する場合、チップ８が欠損してＡＨ信号が発生
すると、被削材３を固定するチャックＳ偶の被剖材端阪
に設置したＡＥセンサー発発信セット空中ＡＥＥセンサ
ーＡｇ３号が検知され、これが増巾器で増巾され、小型
無線発信器で発信される。When cutting the workpiece 2, which is fixed to the chuck 6 by the chuck jaw number and rotates once in the direction of the arrow, with the tip 8 (tool cutting edge), if the tip 8 breaks and an AH signal is generated, the workpiece The airborne AEE sensor No. 3 of the AE sensor transmission set installed on the edge of the specimen of the chuck S that fixes the specimen 3 is detected, this is amplified by an amplification device, and transmitted by a small wireless transmitter.
そしてこの発信されたＡＥ倍信号、切削工具より若干離
れた位置に設置された受信器６に受信される。The transmitted AE multiplied signal is received by a receiver 6 installed at a position slightly away from the cutting tool.
受信器６にはｗｉｚ図にその模式図として示すように、
増巾アンプ７、信号出力アンブ８．警報器９と接続しで
あるから、受信−〇によって受信されたＡＥ倍信号、７
の増巾アンプで増巾され、信号出力アンプ８を経て警報
器９に伝達す蒙るようになっており、ここでチップの摩
耗、欠損をＡＥ倍信号して電報を発するのである。As shown in the schematic diagram of the receiver 6,
Amplifier 7, signal output amplifier 8. Since it is connected to the alarm device 9, the AE multiplied signal received by the receiver-〇, 7
The signal is amplified by an amplification amplifier, and transmitted to an alarm device 9 via a signal output amplifier 8, where a telegram is sent as an AE multiplied signal indicating chip wear or damage.
従って、この発明のような検出方法によれば、切屑ノイ
ズが殆んど受信されないので欠損にょるＡＥ償号を精度
よく検出することができるのである。Therefore, according to the detection method of the present invention, since almost no chip noise is received, it is possible to accurately detect AE correction due to loss.
これに対して、従来切削工具における摩耗、欠損をＡＥ
倍信号して検知するためには、ＡＥ倍信号発生源が工具
刃物であるから、ＡＥＥセンサー工具刃物側に設置しな
いとだめだという観念があって、常にＡＥＥセンサー工
具刃物側に設置してＡＩ信号を検出することを検討して
いた。In contrast, AE reduces wear and damage in conventional cutting tools.
In order to double the signal and detect it, since the source of the AE double signal is the tool blade, there is a concept that the AEE sensor must be installed on the tool blade side. I was considering detecting a signal.
ところが発生する切削屑の大部分はチップ刃先にあるの
でＡＥＥセンサー工具刃物側に設置していたのでは切屑
ノイズの混入を防ぐことができないのである。However, most of the cutting chips generated are on the cutting edge of the chip, so installing the AEE sensor on the cutting edge side of the tool cannot prevent chip noise from entering.
このような従来のＡＥ信号検出方法における欠点も上記
したこの発明の方法によれば工具刃先の種々の損傷とノ
イズの彰１を除いた状部で感知することができるのであ
る。Even with the drawbacks of the conventional AE signal detection method, according to the method of the present invention described above, it is possible to detect various damage to the tool cutting edge and the noise except for noise.
このことは従来の方法で受信したＡＥ倍信号波形（第３
図）と本発明の方法で受信したＡＥ倍信号波形（第４図
）を比べれば明らかである。This means that the AE multiplied signal waveform (third
This becomes clear when comparing the AE multiplied signal waveform (Fig. 4) received by the method of the present invention.
即ち、被削材に工具刃先が当った直後に弱いＡＥ倍信号
エンゲージ）Ｓが発生し、該工具刃先が被剛材から逃げ
た直後に再びＡＥ倍信号ディスエンゲージ） ３１が発
生する。That is, immediately after the tool tip hits the workpiece, a weak AE double signal engage) S occurs, and immediately after the tool tip escapes from the rigid workpiece, the AE double signal disengage) 31 occurs again.
しかしながら第３図の従来法のＡＥ信号波形ではこのＡ
Ｅ償号Ｓ、８１の間に切削屑によるノイズＮと破損信号
Ｈが受信されるのに対し、この発明の方法においては、
エンゲージ、ディスエンゲージのＡＥ信号３ 、 Ｓ’
は工具刃先の破損によるＡＥ倍信号即ち破損信号Ｈに比
べて小さいので破損信号のみを取り出すことができ、こ
れ番ζよって工具刃先の損傷を春易に知ることができる
のである。However, in the conventional AE signal waveform shown in Fig. 3, this A
While the noise N due to cutting debris and the damage signal H are received during the E-breakdown signal S, 81, in the method of the present invention,
Engage, disengage AE signal 3, S'
Since it is smaller than the AE multiplied signal due to damage to the tool cutting edge, that is, the damage signal H, only the damage signal can be extracted, and from this number ζ, it is possible to easily know the damage to the tool cutting edge.
従ってこの発明の方法によれば、高精度で刃先の損傷の
判定ができることとなり、無人工作機械の運転も精度よ
く行うことができるのであって、その実用的価値は非常
に大きいというべきである。Therefore, according to the method of the present invention, damage to the cutting edge can be determined with high precision, and unmanned machine tools can be operated with high precision, and its practical value can be said to be very great.
第１図はこの発明の方法を実施するためにＡＥＥセンサ
ー信セットをチャック固定した被削材のチャック側端面
に設置した切削工具の模式図、第２図は切削工具より離
れた位置にセットした受信器、警報器等の模式図、第８
図は従来めＡＥ傷信号検出法おけるＡＥ信号波形を示す
グラフ、第４図はこの発明のＡＥ傷信号検出法おけるＡ
Ｅ信号波形を示すグラフである。
１−ＡＥセンサー発信セット、３−被削材、８・−チッ
プ、４−チャック爪、５−・チャック、６−受信器、７
−増巾アンプ、８−信号出力アンプ。
９−警報器。
特許出願人 住友電気工業株式会社第１
図
第２図
第３１
第４図Figure 1 is a schematic diagram of a cutting tool installed on the chuck side end face of a workpiece with an AEE sensor signal set fixed to the chuck in order to carry out the method of the present invention, and Figure 2 is a schematic diagram of a cutting tool set at a position away from the cutting tool. Schematic diagram of receiver, alarm, etc., No. 8
The figure is a graph showing the AE signal waveform in the conventional AE flaw signal detection method, and FIG.
It is a graph showing an E signal waveform. 1-AE sensor transmission set, 3-work material, 8-chip, 4-chuck jaw, 5-chuck, 6-receiver, 7
- amplification amplifier, 8 - signal output amplifier. 9- Alarm. Patent applicant: Sumitomo Electric Industries, Ltd. No. 1
Figure 2 Figure 31 Figure 4
Claims (1)
傷によって生ずるアコースティックエミツシ曹ン信号の
検出方法に竺いて、被削材のチャック固定側端面に、Ａ
Ｉセンサー、増巾器、小型するとともに受信された前記
信号を増巾し、出力信号となし、次いでこれを驚報器に
て驚報を発生させるようにしたことを特徴とする工具刃
先損傷の検出方法。In line with the method for detecting the acoustic emitter signal that occurs due to damage to the cutting edge of the tool during turning using a cutting tool on the workpiece, A
This invention is characterized in that the I sensor, the amplification device are made small, and the received signal is amplified and used as an output signal, which is then used to generate a surprise alarm in a alarm device. Detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12445881A JPS5828451A (en) | 1981-08-07 | 1981-08-07 | Method of sensing failures at the tip of cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12445881A JPS5828451A (en) | 1981-08-07 | 1981-08-07 | Method of sensing failures at the tip of cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5828451A true JPS5828451A (en) | 1983-02-19 |
Family
ID=14886013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12445881A Pending JPS5828451A (en) | 1981-08-07 | 1981-08-07 | Method of sensing failures at the tip of cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5828451A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61178043U (en) * | 1985-04-25 | 1986-11-06 | ||
| US5618993A (en) * | 1993-12-24 | 1997-04-08 | Zexel Corporation | Ultrasonic detection apparatus and method for detecting acoustic emission |
| CZ305083B6 (en) * | 2009-07-29 | 2015-04-29 | Technická univerzita v Liberci | Method of monitoring and system for monitoring and evaluating wear of a grinding wheel by means of acoustic emissions generated during grinding process |
| US10688616B2 (en) * | 2017-04-21 | 2020-06-23 | Disco Corporation | Cutting apparatus |
-
1981
- 1981-08-07 JP JP12445881A patent/JPS5828451A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61178043U (en) * | 1985-04-25 | 1986-11-06 | ||
| US5618993A (en) * | 1993-12-24 | 1997-04-08 | Zexel Corporation | Ultrasonic detection apparatus and method for detecting acoustic emission |
| CZ305083B6 (en) * | 2009-07-29 | 2015-04-29 | Technická univerzita v Liberci | Method of monitoring and system for monitoring and evaluating wear of a grinding wheel by means of acoustic emissions generated during grinding process |
| US10688616B2 (en) * | 2017-04-21 | 2020-06-23 | Disco Corporation | Cutting apparatus |
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