JPH02116452A - Deciding method for damage of tool - Google Patents
Deciding method for damage of toolInfo
- Publication number
- JPH02116452A JPH02116452A JP26757788A JP26757788A JPH02116452A JP H02116452 A JPH02116452 A JP H02116452A JP 26757788 A JP26757788 A JP 26757788A JP 26757788 A JP26757788 A JP 26757788A JP H02116452 A JPH02116452 A JP H02116452A
- Authority
- JP
- Japan
- Prior art keywords
- tool
- signal
- damage
- detection
- tool damage
- 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 26
- 238000003754 machining Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 abstract description 46
- 238000005553 drilling Methods 0.000 abstract description 11
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Machine Tool Sensing Apparatuses (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は工具損傷判定方法に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a tool damage determination method.
［従来の技術］
ＮＣ工作機械は多数の切削工具を備え、加工工程に応じ
工具を取換え多工程の加工を自動的に行っている。[Prior Art] An NC machine tool is equipped with a large number of cutting tools, and automatically performs multi-step machining by changing the tools according to the machining process.
斯かるＮＣ工作機械に於いて、工具が損傷すると正しく
切削されない状態で加工か進行し、加工不良となると共
に無駄な加工時間を費すことになって機械の稼動率も低
下する。従って、工具が損傷した時には直ちに機械を停
止させ、工具の交換等所要の手段を講じなければならな
い。In such NC machine tools, if the tool is damaged, machining will proceed without proper cutting, leading to machining defects and wasted machining time, which will reduce the operating rate of the machine. Therefore, when a tool is damaged, it is necessary to immediately stop the machine and take necessary measures such as replacing the tool.
その為、従来より工具の損傷を検出する装置として、音
波検出によるＡ Ｅ （Ａｃｏｕｓｔ ＩｃＥｍｉｓｓ
ｉｏｎ）方式や、音検出、電流・電圧検出、振動検出等
による種々の方式の装置が実施されている。Therefore, as a conventional device for detecting tool damage, AE (Acoustic IcEmiss
ion) type, sound detection, current/voltage detection, vibration detection, etc. have been implemented.
［発明が解決しようとする課題］
しかし、上記向れの方式によっても、加工工程中の負荷
変動が著しい工作機械の小さな欠損に対しては、正常時
においても工具損傷時と似た検知が行われることがあり
、工具が損傷したと誤検知して機械が度々停止し作業が
中断されることが多かった。[Problems to be Solved by the Invention] However, even with the above-mentioned method, small defects in machine tools that undergo significant load fluctuations during the machining process cannot be detected in the same manner as tool damage even during normal operation. This often resulted in incorrect detection that the tool was damaged, causing the machine to stop frequently and work to be interrupted.
本発明は、斯かる実情に鑑み、従来より工具損傷検出の
信頼性を高め、誤検知による作業の中断が少ない工具損
傷判定方法を提供することを目的とする。In view of these circumstances, it is an object of the present invention to provide a tool damage determination method that improves the reliability of tool damage detection compared to the conventional method and reduces interruptions in work due to false detection.
［課題を解決するための手段〕
本発明は、同じ工具で同様の加工を連続して行う工作機
械の工具損傷判定方法において、各工程における工具の
損傷を検出し、損傷信号が２工程に亘って連続して検出
された場合のみ、工具の損傷と判定して前記工作機械に
信号を出力することを特徴とするものである。[Means for Solving the Problems] The present invention is a tool damage determination method for a machine tool that continuously performs similar machining using the same tool, in which damage to the tool is detected in each process, and damage signals are transmitted over two processes. The present invention is characterized in that only when the tool is detected continuously, it is determined that the tool is damaged and a signal is output to the machine tool.
［作 用］
工具の損傷が検出されても、１度の、或いは不連続の工
具損傷検知では工具損傷判定装置は工具が損傷したとは
判定せず、よって工作機械の作業は継続される。連続し
て２度工具損傷検知があった場合のみ工具損傷判定装置
は工具の損傷を判定し、その信号を工作機械に出力する
。[Operation] Even if damage to the tool is detected, the tool damage determination device does not determine that the tool is damaged if the tool damage is detected once or discontinuously, and therefore the machine tool continues to operate. Only when tool damage is detected twice in succession, the tool damage determination device determines tool damage and outputs the signal to the machine tool.
［実 施 例］ 以下、本発明の実施例を図面を参照しつつ説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の方法を実施する装置の一例であり、図
中ｌはＮＣ工作機械、２はＮＣ制御装置、３は工具損傷
検出装置、４は工具損傷判定装置、５はドリル、６はセ
ンサ、７は警報用カウンタ、８はリセットカウンタ、９
は保持回路、工０はＡＮＤ回路、１１はプリンタである
。ここで、工具損傷検出装置３及び工具ｉ！傷判定装置
４はＮＣ制御装置２からの主軸回転信号１２がＯＮの間
、工具損傷の監視を行なう。FIG. 1 shows an example of a device for carrying out the method of the present invention, in which l is an NC machine tool, 2 is an NC control device, 3 is a tool damage detection device, 4 is a tool damage determination device, 5 is a drill, and 6 is a tool damage detection device. is a sensor, 7 is an alarm counter, 8 is a reset counter, 9
1 is a holding circuit, 0 is an AND circuit, and 11 is a printer. Here, tool damage detection device 3 and tool i! The flaw determination device 4 monitors tool damage while the spindle rotation signal 12 from the NC control device 2 is ON.
図中のＮＣ工作機械ｌはドリル５によって所定位置に複
数個の穴あけ加工を行うもので、ＮＣ制御装置２により
、予めプログラムされた条件に従って駆動されており、
前記ドリル５の近くに取付けたセンサ６によって検知信
号１３が工具損傷検出装置３へ送られている。The NC machine tool l in the figure is used to drill multiple holes at predetermined positions using a drill 5, and is driven by an NC control device 2 according to preprogrammed conditions.
A sensor 6 installed near the drill 5 sends a detection signal 13 to the tool damage detection device 3.
１番目の穴あけ加工時に前記検知信号１３が前記工具損
傷検出装置３に設定されている判別レベルを越えると、
工具損傷検出装置３より警報信号１４が出力され、工具
損傷判定装置４に入り、警報用カウンタ７のカウントを
１にすると同時に保持回路９に入り前記警報信号１４が
保持され、信号１９がＡＮＤ回路１０に入力される。１
番目の穴あけ加工が終了すると、ＮＣ制御装置２により
Ｍ信号１５が工具損傷検出装置３へ出力され、該工具損
傷検出装置３はＭ信号１５が人力されるとプリントアウ
ト信号１６をプリンタ１１へ、完了信号１７をＮＣ制御
装置２及び工具損傷判定装置４へと夫々出力する。ＮＣ
制御装置２は前記完了信号１７か入力されると次の駆動
指令１８をＮＣ工作機械１に出力し且つ工具損傷判定装
置４に人力された前記完了信号１７はＡＮＤ回路ＩＯに
入る。この時、ＡＮＤ回路１０は前記保持回路９より信
号１９が入力されているので信号２０をリセットカウン
タ８に出力し、該リセットカウンタ８のカウントを１に
する。When the detection signal 13 exceeds the discrimination level set in the tool damage detection device 3 during the first drilling process,
An alarm signal 14 is output from the tool damage detection device 3, enters the tool damage determination device 4, and at the same time sets the count of the alarm counter 7 to 1, enters the holding circuit 9, where the alarm signal 14 is held, and the signal 19 is sent to the AND circuit. 10 is input. 1
When the th hole drilling process is completed, the NC control device 2 outputs the M signal 15 to the tool damage detection device 3, and when the M signal 15 is input manually, the tool damage detection device 3 sends a printout signal 16 to the printer 11. A completion signal 17 is output to the NC control device 2 and tool damage determination device 4, respectively. N.C.
When the control device 2 receives the completion signal 17, it outputs the next drive command 18 to the NC machine tool 1, and the completion signal 17 manually input to the tool damage determination device 4 enters the AND circuit IO. At this time, since the AND circuit 10 receives the signal 19 from the holding circuit 9, it outputs the signal 20 to the reset counter 8, and sets the count of the reset counter 8 to 1.
ＮＣ工作機械ｌは２番目の穴あけ加工へと移り、この加
工中に工具損傷検出装置３の判断レベルを越える検知信
号１３が人力されないまま加工が終了すれば、警報信号
１４は出力されず、ＮＣ制御装置２からのＭ信号１５が
出力され、工具損傷検出装置３に入る。Ｍ信号１５を受
けた工具損傷検出装置３はプリントアウト信号１６及び
完了信号１７を出力し、該完了信号１７はＡＮＤ回路ｌ
Ｏに入り、該ＡＮＤ回路１０は保持回路９より信号１９
が人力されているので信号２０をリセ・ソトカウンタ８
に出力し、前記信号２０を受けたリセットカウンタ８は
カウントが２となり、警報用カウンタ７と保持回路９に
リセット信号２１を出力し、前記警報用カウンタ７及び
保持回路９をリセットし且つリセットカウンタ８自体も
リセットしカウントを０に戻す。The NC machine tool 1 moves on to the second drilling process, and if the process ends without manual input of the detection signal 13 that exceeds the judgment level of the tool damage detection device 3 during this process, the alarm signal 14 will not be output and the NC The M signal 15 from the control device 2 is output and enters the tool damage detection device 3. The tool damage detection device 3 that receives the M signal 15 outputs a printout signal 16 and a completion signal 17, and the completion signal 17 is outputted to an AND circuit l.
0, and the AND circuit 10 receives the signal 19 from the holding circuit 9.
Since it is done manually, signal 20 is reset to counter 8.
The reset counter 8 receiving the signal 20 counts up to 2, outputs the reset signal 21 to the alarm counter 7 and the holding circuit 9, resets the alarm counter 7 and the holding circuit 9, and resets the reset counter. 8 itself is also reset and the count returns to 0.
ＮＣ工作機械ｌは３番目の穴あけ加工へ移り、この加工
中に工具損傷検出装置３の判断レベルを越える検知信号
１３が人力されると前記に述べた状態となり、ＮＣ工作
機械は次の４番目」の穴あけ加工に移る。The NC machine tool 1 moves to the third drilling process, and when the detection signal 13 exceeding the judgment level of the tool damage detection device 3 is manually input during this process, the NC machine tool 1 moves to the fourth hole drilling process. ” Proceed to the drilling process.
もし、この加工中（４番目の穴あけ加工中）に工具損傷
検出装置３の判断レベルを超える検知信号１３か人力さ
れると前記工具損傷検出装置３より警報信号１４が工具
損傷判定装置４に出力され、警報用カウンタ７に入り、
該警報用カウンタ７のカウントが２となり、工具損傷判
定装置４より警報信号２２をＮＣ制御装置２に出力する
。この警報信号２２を受けたＮＣ制御装置２は主軸回転
を停止しＮＣ工作機械１の駆動を停止する。この時、工
具交換等の処置を行う。ここで主軸回転信号１２がＯＦ
Ｆとなるので工具損傷検出装置３及び工具ｔｉ傷判定装
置４はリセットされ、次の主軸回転信号１２がＯＮにな
るまで待機する。If a detection signal 13 exceeding the judgment level of the tool damage detection device 3 is manually generated during this machining (during the fourth hole drilling process), an alarm signal 14 is output from the tool damage detection device 3 to the tool damage determination device 4. is entered into the alarm counter 7,
The count of the alarm counter 7 becomes 2, and the tool damage determination device 4 outputs an alarm signal 22 to the NC control device 2. Upon receiving this alarm signal 22, the NC control device 2 stops rotating the main shaft and stops driving the NC machine tool 1. At this time, take measures such as tool replacement. Here, the main shaft rotation signal 12 is OF
F, so the tool damage detection device 3 and tool damage determination device 4 are reset and wait until the next spindle rotation signal 12 turns ON.
従って、上記によれば、工具検出装置３の判定レベルを
越える検知信号１３があっても、１度では誤検知の可能
性が高いのでＮＣ工作機械１を停止させることをせず、
連続して２度工具損傷が検知されるような信頼性の高い
場合にのみ、ＮＣ工作機械１を停止させることによって
、従来より工具損傷検出の信頼性を高めると共に誤検知
による作業の中断を著しく減少させ、作業効率を向上さ
せることができる。Therefore, according to the above, even if there is a detection signal 13 that exceeds the judgment level of the tool detection device 3, the NC machine tool 1 is not stopped because there is a high possibility that it will be falsely detected once.
By stopping the NC machine tool 1 only in highly reliable cases such as when tool damage is detected twice in a row, the reliability of tool damage detection is improved compared to conventional methods, and work interruptions due to false detections are significantly reduced. can be reduced and work efficiency improved.
尚、本発明の工具損傷判定方法は、上述の実施例にのみ
限定されるものではなく、ドリルによる穴あけ加工を行
うＮＣ工作機械以外であっても、同じ工具で連続して同
様の加工を行う機械であれば種々の方式に採用し得るこ
と、センサの検知方式は音波検出、音検出、電流・電圧
検出、振動検出、回転数検出等の種々の方式を採用し得
ること、その池水発明の要旨を逸脱しない範囲内におい
て種々変更を加え得ることは勿論である。It should be noted that the tool damage determination method of the present invention is not limited to the above-described embodiments, but can also be applied to an NC machine tool other than an NC machine tool that performs hole drilling using the same tool. The invention of Ikemizu is that it can be used in a variety of ways if it is a machine, and that the detection method of the sensor can be a variety of methods such as sound wave detection, sound detection, current/voltage detection, vibration detection, and rotation speed detection. Of course, various changes may be made without departing from the spirit of the invention.
［発明の効果］
以上説明したように、本発明の工具損傷判定方法によれ
ば、従来より工具損傷検出の信頼性を高めることができ
、よって誤検知による作業の中断を著しく減少させ、作
業効率を向上させることができる等、種々の優れた効果
を奏し得る。[Effects of the Invention] As explained above, according to the tool damage determination method of the present invention, it is possible to improve the reliability of tool damage detection compared to the conventional method, thereby significantly reducing work interruptions due to false detection, and improving work efficiency. Various excellent effects can be achieved, such as improved performance.
第１図は本発明の方法を実施する装置の一例を示すブロ
ック図である。
ｌはＮＣ工作機械、２はＮＣ制御装置、３は工具損傷検
出装置、４は工具損傷判定装置、１３検知信号、２２は
警報信号を示す。FIG. 1 is a block diagram showing an example of an apparatus for carrying out the method of the present invention. 1 is an NC machine tool, 2 is an NC control device, 3 is a tool damage detection device, 4 is a tool damage determination device, 13 is a detection signal, and 22 is an alarm signal.
Claims (1)
具損傷判定方法において、各工程における工具の損傷を
検出し、損傷信号が２工程に亘って連続して検出された
場合のみ、工具の損傷と判定して前記工作機械に信号を
出力することを特徴とする工具損傷判定方法。1) In a tool damage determination method for a machine tool that continuously performs similar machining using the same tool, damage to the tool is detected in each process, and only when a damage signal is detected continuously over two processes, the tool A method for determining damage to a tool, comprising determining that the tool is damaged and outputting a signal to the machine tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26757788A JPH02116452A (en) | 1988-10-24 | 1988-10-24 | Deciding method for damage of tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26757788A JPH02116452A (en) | 1988-10-24 | 1988-10-24 | Deciding method for damage of tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02116452A true JPH02116452A (en) | 1990-05-01 |
Family
ID=17446712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26757788A Pending JPH02116452A (en) | 1988-10-24 | 1988-10-24 | Deciding method for damage of tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02116452A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719217B1 (en) | 1998-12-28 | 2004-04-13 | Kao Corporation | Aromatizer |
-
1988
- 1988-10-24 JP JP26757788A patent/JPH02116452A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719217B1 (en) | 1998-12-28 | 2004-04-13 | Kao Corporation | Aromatizer |
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