TW201334911A - Method and apparatus for detecting the break of the cutter of the machine tool automatically - Google Patents

Method and apparatus for detecting the break of the cutter of the machine tool automatically Download PDF

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TW201334911A
TW201334911A TW101106217A TW101106217A TW201334911A TW 201334911 A TW201334911 A TW 201334911A TW 101106217 A TW101106217 A TW 101106217A TW 101106217 A TW101106217 A TW 101106217A TW 201334911 A TW201334911 A TW 201334911A
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Taiwan
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tool
signal
module
signal processing
frequency
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TW101106217A
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Chinese (zh)
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Yung-Cheng Wang
guo-hua Feng
Fu-Tun Chang
Chung-Ping Chang
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Optica Tech Co Ltd
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Abstract

This invention is concerned with the measurement method and apparatus for the breakage detection of the cutter in the machine tool. The system includes a sensing module, a signal processing and a display module. The sensing module is mounted on a non-rotational part of the spindle of the machine tool. At the processing of a work piece, the signal processing module will receive the vibration signal and the voice frequency detected by the sensing module. The signal is treated by the signal processing module, and a threshold is set in the module in advance. When the amplitude of the vibration is within the threshold, the processing will be verified as normal. Otherwise when beyond the threshold of the vibration, the processing will be denoted as abnormal. Simultaneously we can do the double check by the sensing module. By this way, an automatic detecting system with the characteristics of the enhancement of the working efficiency and reliability the minimization of the idling time can be realized.

Description

工具機斷刀自動偵測方法及其裝置Tool machine broken knife automatic detecting method and device thereof

本發明係關於一種自動偵測裝置,尤指一種用以偵測工具機斷刀自動偵測方法及其裝置者。The invention relates to an automatic detecting device, in particular to a method and a device for detecting an automatic detecting of a machine tool broken knife.

目前CNC工具機於加工時,常會面臨刀具選用及加工進給條件的最佳化配合,在設定的過程中,通常很難達到最佳的加工結果,若再加上刀具本身的各種因素,例如:刀具加工之徑深比、刀具再研磨之後造成的單面切削或刀具材質上的瑕疵…等等,容易在加工過程中造成刀具的損壞斷裂,斷刀後若無即時檢出並立即換刀,不僅會導致後續的製程無法順利進行,嚴重者更會造成模具工件及機台的損壞。At present, when CNC machine tools are processed, they often face the optimal combination of tool selection and machining feed conditions. In the process of setting, it is often difficult to achieve the best machining results, plus various factors of the tool itself, for example : The diameter-to-deep ratio of the tool machining, the single-sided cutting caused by the re-grinding of the tool or the boring of the tool material, etc., it is easy to cause damage and breakage of the tool during the machining process. If the tool is not detected immediately after the tool is cut, the tool is immediately changed. Not only will the subsequent process not be carried out smoothly, but also the damage of the mold workpiece and the machine table will be caused.

再者,在加工的過程中,會產生切屑及噴灑大量的切削液,以人工的方式從監視窗口觀察刀具是否斷裂實屬不易,因在此過程中,操作者無法即時得知加工狀況,所以通常會造成整個加工過程中的擴大毀損,其中以微小徑刀具(<0.5mm的端銑刀)的加工過程為例,由於刀具直徑很小,即使新刀具也無法直接以肉眼辨識刀具正常與否,更何況加工製程中有大量的冷卻水沖在加工接觸面上,當刀具斷裂無法接觸到工件表面,通常必須等到整個加工程序完成後,透過檢視工件表面的方式,方能得知在加工的過程中發生刀具斷裂的情況,誠有加以改進之處。Moreover, in the process of processing, chips are generated and a large amount of cutting fluid is sprayed, and it is difficult to manually observe whether the tool is broken from the monitoring window in an artificial manner, because the operator cannot immediately know the processing state in the process, so It usually causes the expansion and damage of the whole machining process. For example, the machining process of the micro-diameter tool (<0.5mm end mill) is taken as an example. Because the tool diameter is small, even if the new tool can not directly identify the tool normally or not. Moreover, in the processing process, a large amount of cooling water is punched on the processing contact surface. When the tool breaks and cannot contact the surface of the workpiece, it is usually necessary to wait until the entire machining process is completed, by examining the surface of the workpiece, to know the processing. In the process of tool breakage, there are improvements.

因此,本發明人有鑑於目前可即時偵測工具機刀具狀況的偵測裝置,因而無法提供即時斷刀的提示功能以及輔助使用者判斷換刀的時機的不足與問題,特經過不斷的研究與試驗,終於發展出一種能改進現有缺失之本發明。Therefore, the present inventors have in view of the current detection device capable of detecting the condition of the tool tool in real time, and thus cannot provide the prompt function of the instant knife breaking and the problem and the problem of assisting the user in judging the timing of the tool change. Experiments have finally developed a invention that improves existing defects.

有鑒於此,本專利設計一套工具機斷刀自動偵測系統,可掛載於工具機上並具即時斷刀提示功能及人員再確認裝置,以輔助使用者判斷換刀的時機,可即時提示及再確認、增加工作效率及減少機台刀具斷裂後之空轉。In view of this, this patent designs a set of tool-cutting automatic detection system that can be mounted on the machine tool and has an instant tool-cracking function and a personnel re-confirmation device to assist the user in judging the timing of the tool change. Prompt and reconfirm, increase work efficiency and reduce idling after machine tool breakage.

本發明之主要目的係在於提供一種工具機斷刀自動偵測方法及其裝置,其係可自動且即時地對於工具機的刀具進行偵測,進而提供一可即時提示及人員再確認裝置、增加工作效率及減少機台刀具斷裂後之空轉之目的者。The main object of the present invention is to provide a method and device for automatically detecting a broken tool of a machine tool, which can automatically and instantly detect a tool of a machine tool, thereby providing an instant prompt and personnel reconfirmation device, and adding Work efficiency and reduce the purpose of idling after the machine tool breaks.

為達到上述目的,本發明係提供一種工具機斷刀自動偵測方法,其操作流程係包含有:提供一自動偵測裝置:偵測裝置係設有一偵測模組、一訊號處理模組及一顯示模組,該偵測模組係可偵測刀具的振動及音頻,該訊號處理模組係與偵測模組相連接且設有一轉換程式,而該顯示模組係與訊號處理模組相連接且設有一顯示器及一噪音接收器;儀器架設:將該自動偵測裝置的模組設置於一工具機主軸固定端上,將一待加工的工件置於該工具機之工作台上,以該主軸上的刀具對於該待加工的工件進行加工;訊號轉換:當該刀具對於該待加工的工件進行加工時,以該偵測模組偵測該主軸各軸向的振動情形及所產生的音頻,並傳送至該訊號處理模組中,由該訊號處理模組進行訊號的處理與傳送;標準值設定:加工狀態的振幅與頻率則會因為工件與刀具的型態有不同的變化,但整體的加工狀態時必會產生一特定頻率及音頻,而加工時的特定頻率及音頻必須透過工具機的結構分析與已知轉速來作判定,依據該共振頻率及旋轉頻率預設一臨界標準值,並經由人工方式監測所偵測到的音頻;以及比對訊號值:當加工時的頻率係位於設定的臨界標準值上時,則視為一刀具正常加工的狀態,並於該顯示模組的顯示器上顯示出一刀具正常之指示,當刀具斷裂時,由於工具機主軸旋轉及機台共振所引起的頻率會異於正常加工時的頻率,使其加工頻率會低於該臨界標準值,視為一刀具異常加工的狀態,並於該顯示模組的顯示器上顯示出一刀具異常之指示。In order to achieve the above object, the present invention provides a method for automatically detecting a tool-breaking tool, the operating process of which includes: providing an automatic detecting device: the detecting device is provided with a detecting module, a signal processing module, and a display module for detecting vibration and audio of the tool, the signal processing module being connected to the detection module and having a conversion program, and the display module and the signal processing module Connected and provided with a display and a noise receiver; the instrument is arranged: the module of the automatic detecting device is arranged on a fixed end of a machine tool spindle, and a workpiece to be processed is placed on the working table of the machine tool. The workpiece on the spindle is processed by the tool on the spindle; signal conversion: when the tool is processed for the workpiece to be processed, the detection module detects the vibration condition of each axis of the spindle and generates The audio is transmitted to the signal processing module, and the signal processing module performs signal processing and transmission; the standard value setting: the amplitude and frequency of the processing state are due to the type of the workpiece and the tool. Different changes, but the specific processing state must produce a specific frequency and audio, and the specific frequency and audio during processing must be determined by the structural analysis of the machine tool and the known speed, based on the resonant frequency and the rotational frequency. Setting a critical standard value and manually monitoring the detected audio; and comparing the signal value: when the frequency during processing is at a set critical standard value, it is regarded as a state in which the tool is normally processed, and A normal tool indication is displayed on the display of the display module. When the tool is broken, the frequency caused by the spindle rotation of the machine tool and the resonance of the machine will be different from the frequency during normal machining, so that the processing frequency will be lower than that. The critical standard value is regarded as a state of abnormal machining of the tool, and an indication of a tool abnormality is displayed on the display of the display module.

進一步,在該提供一自動偵測裝置的操作步驟中,該偵測模組係設有一保護殼、一三軸加速度規、一放大電路及一無線噪音偵測器,該三軸加速度規係與該放大電路相連接且皆設置於該保護殼內,該無線噪音偵測器亦設於該保護殼內,該訊號處理模組係設有一用以接收該無線噪音偵測器所偵測到音頻的無線噪音傳輸器,而該噪音接收器係用以接收該無線噪音傳輸器所傳送的音頻。Further, in the operation step of providing an automatic detecting device, the detecting module is provided with a protective shell, a three-axis accelerometer, an amplifying circuit and a wireless noise detector, and the three-axis acceleration gauge The amplifying circuit is connected to the protective casing, and the wireless noise detector is disposed in the protective casing. The signal processing module is configured to receive the audio detected by the wireless noise detector. a wireless noise transmitter for receiving audio transmitted by the wireless noise transmitter.

再進一步,在該儀器架設的操作步驟中,將該偵測模組設置於該主軸非轉子的軸承座上。Further, in the operating step of the apparatus erecting, the detecting module is disposed on the bearing housing of the spindle non-rotor.

較佳地,在該訊號轉換的操作步驟中,當該偵測模組偵測該主軸各軸向的振動情形及所產生的音頻後,將相對應的訊號經由該放大電路放大及該無線噪音偵測器偵測後,傳送至該訊號處理模組中,由該訊號處理模組進行訊號的處理與傳送。Preferably, in the operation step of the signal conversion, when the detecting module detects the vibration condition of each axis of the spindle and the generated audio, the corresponding signal is amplified and the wireless noise is amplified by the amplifying circuit. After the detector detects the signal, it is transmitted to the signal processing module, and the signal processing module processes and transmits the signal.

較佳地,在該訊號轉換的操作步驟中,該轉換程式對於振動訊號進行短時距傅立葉轉換,將振動訊號的振幅-時間關係轉換成一振幅與頻率關係。Preferably, in the operation step of the signal conversion, the conversion program performs short-time Fourier transform on the vibration signal, and converts the amplitude-time relationship of the vibration signal into an amplitude-frequency relationship.

本發明另提供一種工具機斷刀自動偵測裝置,其係包含有一偵測模組、一訊號處理模組及一顯示模組,其中:該偵測模組係設有一保護殼、一三軸加速度規、一放大電路及一無線噪音偵測器,該三軸加速度規係與該放大電路相連接且皆設置於該保護殼內,該無線噪音偵測器亦設於該保護殼內;該訊號處理模組係與該偵測模組相連接且設有一轉換程式及一無線噪音傳輸器;以及該顯示模組係與該訊號處理模組相連接且設有一顯示器及一噪音接收器。The present invention further provides an automatic detection device for a machine tool, which comprises a detection module, a signal processing module and a display module, wherein: the detection module is provided with a protective shell and a three-axis An acceleration gauge, an amplifying circuit and a wireless noise detector, the three-axis acceleration gauge is connected to the amplifying circuit and disposed in the protective casing, and the wireless noise detector is also disposed in the protective casing; The signal processing module is connected to the detection module and has a conversion program and a wireless noise transmitter; and the display module is connected to the signal processing module and is provided with a display and a noise receiver.

藉由上述的技術手段,本發明工具機斷刀自動偵測方法及其裝置,主要係透過偵測模組偵測工具機及刀具加工時的振動及所產生的音頻,進而可以得知刀具在正常加工移除工件材質時,會產生何種型式的振動及音頻資料,並透過傳輸到訊號處理模組中,透過短時距傅立葉的運算,轉換成可以輕易解讀的頻譜圖,讓使用者可以選擇所要監測的最佳位置與設定最佳的加工振動臨界標準值,再者,亦可設定振動臨界標準值的上、下區間,來調整出現異常訊號的敏感度,並且可透過人工監測的方式,經由所產生的音頻作進一步的確認;當確認此訊號為正常切削時的訊號時,可以用來設定成加工時的臨界標準值,因此,當重複此加工製程時,我們便可將臨界標準值用來比對正在加工時的振動訊號值,其中當刀具毀損或斷裂時,由於刀具無法正常接觸到工件進行正常的加工移除,因此,就無法產生原來所設定的振動訊號值,因此,偵測到的訊號值會與原來設定的訊號值有所差異,便可依此發出警示,有效解決目前使用者要等到整個CNC加工程式的循環結束後,方能從工件上得知整個製程中,刀具在加工到一半或是更早時已斷裂的情況,可即時偵測加工刀具的毀損狀況,進而提供一可即時提示及再確認、增加工作效率及減少機台刀具斷裂後之空轉之工具機斷刀自動偵測方法及其裝置者。According to the above technical means, the automatic detecting method and device for the tool cutting machine of the present invention mainly detects the vibration of the machine tool and the tool processing and the generated audio through the detecting module, thereby knowing that the tool is in the What kind of vibration and audio data will be generated when the workpiece material is removed by normal processing, and transmitted to the signal processing module, and converted into a spectrogram that can be easily interpreted by short-time Fourier operation, so that the user can Select the best position to be monitored and set the optimal critical value of the machining vibration. Furthermore, you can set the upper and lower intervals of the critical value of the vibration to adjust the sensitivity of the abnormal signal and can be manually monitored. Further confirmation by the generated audio; when confirming that the signal is a normal cutting signal, it can be used to set the critical standard value during processing, so when the processing is repeated, we can set the critical standard The value is used to compare the value of the vibration signal while being processed. When the tool is damaged or broken, the tool cannot contact the workpiece normally. The normal processing is removed, so the original set vibration signal value cannot be generated. Therefore, the detected signal value will be different from the original set signal value, and the warning can be issued accordingly to effectively solve the current user. It is necessary to wait until the end of the cycle of the entire CNC machining program to know from the workpiece that the tool has been broken halfway or earlier in the entire process, and the damage of the machining tool can be detected immediately, thereby providing a The automatic detection method and device for the tool machine broken knife which can promptly prompt and re-confirm, increase the work efficiency and reduce the idling after the machine tool breaks.

為能詳細瞭解本發明的技術特徵及實用功效,並可依照說明書的內容來實施,玆進一步以圖式(如圖1至3所示)所示的較佳實施例,詳細說明如后:In order to understand the technical features and practical effects of the present invention in detail, and in accordance with the contents of the specification, the preferred embodiments shown in the drawings (shown in FIGS. 1 to 3) are described in detail as follows:

本發明主要係透過在加工時,刀具要移除被加工件時,刀具會破壞工件與刀具接觸面的分子結構,由於工件分子結構的堆疊和擠壓會產生熱,且在移除過程中,刀具與被移除材料雙方的接觸面亦會產生振動,透過偵測刀具振動的方式進行刀具狀態的辨別,進而提供一工具機斷刀自動偵測方法及其裝置,其中該工具機斷刀自動偵測方法係包含有:The invention mainly discloses that when the tool is to be processed, the tool breaks the molecular structure of the workpiece and the tool contact surface during processing, and heat is generated due to stacking and squeezing of the molecular structure of the workpiece, and during the removal process, The contact surface between the tool and the material to be removed also generates vibration, and the tool state is discriminated by detecting the vibration of the tool, thereby providing a method and device for automatically detecting the tool cutting tool, wherein the machine tool is automatically broken. The detection method includes:

A、提供一自動偵測裝置:該偵測裝置係設有一偵測模組10、一訊號處理模組20及一顯示模組30,其中該偵測模組10係設有一保護殼11、一三軸加速度規12、一放大電路13及一無線噪音偵測器14,該三軸加速度規12係與該放大電路13相連接且皆設置於該保護殼11內,而該無線噪音偵測器14亦設於該保護殼11內,該訊號處理模組20係與該偵測模組10相連接且設有一轉換程式21及一無線噪音傳輸器22,而該顯示模組30係與該訊號處理模組20相連接且設有一顯示器31及一噪音接收器32,較佳地,該噪音接收器32係可為一無線耳機;A. An automatic detection device is provided. The detection device is provided with a detection module 10, a signal processing module 20 and a display module 30. The detection module 10 is provided with a protective casing 11 and a The three-axis accelerometer 12, an amplifying circuit 13 and a wireless noise detector 14 are connected to the amplifying circuit 13 and are disposed in the protective casing 11, and the wireless noise detector The signal processing module 20 is connected to the detection module 10 and is provided with a conversion program 21 and a wireless noise transmitter 22, and the display module 30 is coupled to the signal. The processing module 20 is connected to the display and is provided with a display 31 and a noise receiver 32. Preferably, the noise receiver 32 can be a wireless earphone;

B、儀器架設:如圖3所示將該自動偵測裝置的偵測模組10設置於一工具機主軸50固定端上,較佳地,將該偵測模組10設置於該主軸50非轉子的軸承座51上,將一待加工的工件60置於該工具機的工作台52上,以該主軸50上的刀具53對於該待加工的工件60進行加工;B. Instrument erection: As shown in FIG. 3, the detection module 10 of the automatic detection device is disposed on a fixed end of a machine tool spindle 50. Preferably, the detection module 10 is disposed on the spindle 50. On the bearing housing 51 of the rotor, a workpiece 60 to be processed is placed on the table 52 of the machine tool, and the workpiece 53 on the spindle 50 is processed for the workpiece 60 to be processed;

C、訊號轉換:當該刀具53對於該待加工的工件60進行加工時,以該偵測模組10偵測該主軸50各軸向的振動(加速度)情形及所產生的音頻,並將相對應的訊號經由該放大電路13放大及該無線噪音偵測器14偵測後,傳送至該訊號處理模組20中,由該訊號處理模組20進行訊號的處理與傳送,較佳地,由該轉換程式21對於該振動訊號進行短時距傅立葉轉換(Short-Time Fourier Transform,STFT),其中該短時距傅立葉轉換的公式為C. Signal conversion: When the tool 53 is processed for the workpiece 60 to be processed, the detection module 10 detects the vibration (acceleration) of the axial direction of the spindle 50 and the generated audio, and the phase The corresponding signal is amplified by the amplifying circuit 13 and detected by the wireless noise detector 14 and transmitted to the signal processing module 20, and the signal processing module 20 processes and transmits the signal. Preferably, The conversion program 21 performs a Short-Time Fourier Transform (STFT) on the vibration signal, wherein the formula of the short-time Fourier transform is

透過該短時距傅立葉轉換後,可將該振動訊號的振幅-時間關係(時間域)轉換成一振幅與頻率關係(頻率域),其中如圖4所示在轉換前的原始訊號,係由三種頻率分別為100、200及300赫茲(Hz)的弦波疊加而成的訊號,此原始訊號非常雜亂且難以分析,但經過短時距傅立葉轉換後,則可清楚的看出此訊號主要係由三種頻率的波形疊加而成,再者,於刀具53對於該待加工的工件60進行加工時,同時透過該無線噪音偵測器14偵測刀具於加工時所產生的音頻,並經由該無線噪音傳輸器22將該無線噪音偵測器14所偵測到的音頻傳送至該噪音接收器中32,透過人工方式進行監測;After the short-time Fourier transform, the amplitude-time relationship (time domain) of the vibration signal can be converted into an amplitude-frequency relationship (frequency domain), wherein the original signal before the conversion as shown in FIG. 4 is composed of three types. Signals with a frequency of 100, 200, and 300 Hz (Hz) are superimposed. The original signal is very cluttered and difficult to analyze. However, after a short-time Fourier transform, it is clear that the signal is mainly caused by The waveforms of the three frequencies are superimposed. Further, when the tool 53 is processed for the workpiece 60 to be processed, the wireless noise detector 14 is simultaneously detected by the wireless noise detector 14 to generate audio through the wireless noise. The transmitter 22 transmits the audio detected by the wireless noise detector 14 to the noise receiver 32 for monitoring by manual means;

D、標準值設定:加工狀態的振幅與頻率則會因為工件60與刀具53的型態有不同的變化,但整體的加工狀態時必會產生一特定頻率,而加工時的特定頻率必須透過工具機的結構分析與已知轉速來作判定,其中如圖5所示,其中工具機的共振頻率(A)約為300赫茲(Hz),主軸50的轉速約為20000RPM(333Hz),其旋轉頻率為(B),依據該共振頻率及旋轉頻率預設一臨界標準值(C),其中係將該臨界值標準(C)設定為加工狀態最大振幅的N%,例如設定臨界標準值(C)為最大振幅的70%,假設最大振幅為100μm,則臨界標準值(C)則為70μm,但此設定百分比的多寡需依照機台狀況而定;以及D. Standard value setting: The amplitude and frequency of the machining state will change differently due to the shape of the workpiece 60 and the tool 53. However, the specific machining state must generate a specific frequency, and the specific frequency during machining must pass through the tool. The structural analysis of the machine is determined by the known rotational speed, wherein as shown in Fig. 5, the resonance frequency (A) of the machine tool is about 300 Hz, and the rotational speed of the spindle 50 is about 20,000 RPM (333 Hz). For (B), a critical standard value (C) is preset according to the resonant frequency and the rotational frequency, wherein the threshold value standard (C) is set to N% of the maximum amplitude of the processing state, for example, a critical standard value (C) is set. For the maximum amplitude of 70%, assuming a maximum amplitude of 100 μm, the critical standard value (C) is 70 μm, but the percentage of this setting depends on the condition of the machine;

E、比對訊號值:如圖5所示當加工時的頻率係位於該臨界標準值(C)上時,則視為一刀具正常加工的狀態,並於該顯示模組30的顯示器31上顯示出一刀具正常之指示,反之,當刀具53斷裂時,由於工具機主軸50旋轉及機台共振所引起的頻率會大幅衰減,使其加工頻率(A),(B)會低於該臨界標準值(C),視為一刀具異常加工的狀態,並於該顯示模組30的顯示器31上顯示出一刀具異常之指示。E. Alignment signal value: as shown in FIG. 5, when the frequency during processing is located on the critical standard value (C), it is regarded as a normal processing state of the tool, and is displayed on the display 31 of the display module 30. The indication of a normal tool is displayed. Conversely, when the cutter 53 is broken, the frequency caused by the rotation of the machine tool spindle 50 and the resonance of the machine will be greatly attenuated, so that the machining frequency (A), (B) will be lower than the critical value. The standard value (C) is regarded as a state in which the tool is abnormally machined, and an indication of a tool abnormality is displayed on the display 31 of the display module 30.

藉由上述的技術手段,本發明工具機斷刀自動偵測方法及其裝置,主要係透過偵測模組10偵測工具機及刀具53加工時的振動及所產生的音頻,進而可以得知刀具53在正常加工移除工件60材質時,會產生何種型式的振動及音頻資料,並透過傳輸到訊號處理模組20中,透過短時距傅立葉的運算,轉換成可以輕易解讀的頻譜圖,讓使用者可以選擇所要監測的最佳位置與設定最佳的加工振動臨界標準值(C),再者,亦可設定振動臨界標準值(C)的上、下區間,來調整出現異常訊號的敏感度,並且可透過人工監測的方式,經由所產生的音頻作進一步的確認;當確認此訊號為正常切削時的訊號時,可以用來設定成加工時的臨界標準值(C),因此,當重複此加工製程時,我們便可將臨界標準值(C)用來比對正在加工時的振動訊號值(A),(B),其中當刀具53毀損或斷裂時,由於刀具53無法正常接觸到工件60進行正常的加工移除,因此,就無法產生原來所設定的振動訊號值,因此,偵測到的訊號值會與原來設定的訊號值有所差異,便可依此發出警示,有效解決目前使用者要等到整個CNC加工程式的循環結束後,方能從工件上得知整個製程中,刀具在加工到一半或是更早時已斷裂的情況,可即時偵測加工刀具的毀損狀況,進而提供一可即時提示及再確認、增加工作效率及減少機台刀具斷裂後之空轉之工具機斷刀自動偵測方法及其裝置者。According to the above technical means, the automatic detecting method and device for the tool cutting machine of the present invention mainly detects the vibration of the machine tool and the tool 53 during processing and the generated audio through the detecting module 10, thereby being known What type of vibration and audio data is generated by the cutter 53 during normal machining to remove the workpiece 60 material, and transmitted to the signal processing module 20, and converted into a spectrum pattern that can be easily interpreted by short-time Fourier operation. , allowing the user to select the best position to be monitored and set the optimal machining vibration critical standard value (C), or set the upper and lower intervals of the vibration critical standard value (C) to adjust the abnormal signal. Sensitivity, and can be further confirmed by manual monitoring through the generated audio; when confirming that the signal is a normal cutting signal, it can be used to set the critical standard value (C) during processing, so When repeating this machining process, we can use the critical standard value (C) to compare the vibration signal values (A), (B) during machining, when the tool 53 is damaged or broken, due to the knife 53 The workpiece 60 cannot be normally touched for normal processing removal. Therefore, the originally set vibration signal value cannot be generated. Therefore, the detected signal value will be different from the originally set signal value. A warning is issued to effectively solve the problem that the current user has to wait until the end of the cycle of the entire CNC machining program to know from the workpiece that the tool has been broken in half or earlier when the entire process is processed. The damage condition of the tool, and then provides an automatic detection method and device for the tool machine broken knife which can promptly prompt and reconfirm, increase the work efficiency and reduce the idling after the machine tool breaks.

以上所述,僅是本發明的較佳實施例,並非對本發明作任何形式上的限制,任何所屬技術領域中具有通常知識者,若在不脫離本發明所提技術方案的範圍內,利用本發明所揭示技術內容所作出局部更動或修飾的等效實施例,並且未脫離本發明的技術方案內容,均仍屬於本發明技術方案的範圍內。The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any one of ordinary skill in the art can use the present invention without departing from the scope of the present invention. Equivalent embodiments of the invention may be made without departing from the technical scope of the present invention.

10...偵測模組10. . . Detection module

11...保護殼11. . . Protective case

12...三軸加速度規12. . . Triaxial acceleration gauge

13...放大電路13. . . amplifying circuit

14...無線噪音偵測器14. . . Wireless noise detector

20...訊號處理模組20. . . Signal processing module

21...轉換程式twenty one. . . Conversion program

22...無線噪音傳輸器twenty two. . . Wireless noise transmitter

30...顯示模組30. . . Display module

31...顯示器31. . . monitor

32...噪音接收器32. . . Noise receiver

50...主軸50. . . Spindle

51...軸承座51. . . Bearing housing

52...工作台52. . . Workbench

53...刀具53. . . Tool

60...工件60. . . Workpiece

圖1係本發明工具機斷刀自動偵測方法之操作方塊示意圖。1 is a block diagram showing the operation of the automatic detecting method of the tool cutting machine of the present invention.

圖2係本發明工具機斷刀自動偵測裝置之方塊示意圖。2 is a block diagram of the automatic detecting device for the tool cutting machine of the present invention.

圖3係本發明工具機斷刀自動偵測裝置之偵測操作示意圖。FIG. 3 is a schematic diagram of the detecting operation of the automatic detecting device for the tool cutting machine of the present invention.

圖4係本發明振幅-時間關係轉換成振幅與頻率關係之示意圖。Figure 4 is a schematic illustration of the amplitude-time relationship of the present invention converted into amplitude versus frequency.

圖5係本發明判斷刀具是否斷裂之振幅與頻率關係圖。Fig. 5 is a graph showing the relationship between amplitude and frequency for determining whether a tool is broken by the present invention.

Claims (9)

一種工具機斷刀自動偵測方法,其操作流程包含有:提供一自動偵測裝置:偵測裝置係設有一偵測模組、一訊號處理模組及一顯示模組,該偵測模組係可偵測刀具的振動及音頻,該訊號處理模組係與偵測模組相連接且設有一轉換程式,而該顯示模組係與訊號處理模組相連接且設有一顯示器及一噪音接收器;儀器架設:將該自動偵測裝置的模組設置於一工具機主軸固定端上,將一待加工的工件置於該工具機之工作台上,以該主軸上的刀具對於該待加工的工件進行加工;訊號轉換:當該刀具對於該待加工的工件進行加工時,以該偵測模組偵測該主軸各軸向的振動情形及所產生的音頻,並傳送至該訊號處理模組中,由該訊號處理模組進行訊號的處理與傳送;標準值設定:加工狀態的振幅與頻率則會因為工件與刀具的型態有不同的變化,但整體的加工狀態時必會產生一特定頻率及音頻,而加工時的特定頻率及音頻必須透過工具機的結構分析與已知轉速來作判定,依據該共振頻率及旋轉頻率預設一臨界標準值,並經由人工方式監測所偵測到的音頻;以及比對訊號值:當加工時的頻率係位於設定的臨界標準值上時,則視為一刀具正常加工的狀態,並於該顯示模組的顯示器上顯示出一刀具正常之指示,當刀具斷裂時,由於工具機主軸旋轉及機台共振所引起的頻率會異於正常加工時的頻率,使其加工頻率會低於該臨界標準值,視為一刀具異常加工的狀態,並於該顯示模組的顯示器上顯示出一刀具異常之指示。An automatic detection method for a tool-breaking knife includes an automatic detection device: a detection module, a signal processing module and a display module, the detection module The vibration processing and the audio of the tool are detected. The signal processing module is connected to the detection module and has a conversion program. The display module is connected to the signal processing module and is provided with a display and a noise receiving. The erection of the device is set on the fixed end of a machine tool spindle, and a workpiece to be processed is placed on the work table of the machine tool, and the tool on the spindle is processed for the tool The workpiece is processed; the signal conversion: when the tool is processed for the workpiece to be processed, the detection module detects the vibration condition of the shaft and the generated audio, and transmits the generated audio to the signal processing module. In the group, the signal processing module performs signal processing and transmission; the standard value setting: the amplitude and frequency of the machining state will change differently due to the shape of the workpiece and the tool, but the overall machining state A certain frequency and audio must be generated, and the specific frequency and audio during processing must be determined by the structural analysis of the machine tool and the known rotational speed. A critical standard value is preset according to the resonant frequency and the rotational frequency, and manually Monitoring the detected audio; and comparing the signal value: when the processing frequency is at the set critical standard value, it is regarded as a normal processing state of the tool, and is displayed on the display of the display module A normal tool indication, when the tool breaks, the frequency caused by the spindle rotation of the machine tool and the resonance of the machine will be different from the frequency of normal machining, so that the machining frequency will be lower than the critical standard value, which is regarded as a tool abnormality. The state of the process and an indication of a tool abnormality is displayed on the display of the display module. 如請求項1所述之工具機斷刀自動偵測方法,其中在該提供一自動偵測裝置的操作步驟中,該偵測模組係設有一保護殼、一三軸加速度規、一放大電路及一無線噪音偵測器,該三軸加速度規係與該放大電路相連接且皆設置於該保護殼內,該無線噪音偵測器亦設於該保護殼內,該訊號處理模組係設有一用以接收該無線噪音偵測器所偵測到音頻的無線噪音傳輸器,而該噪音接收器係用以接收該無線噪音傳輸器所傳送的音頻。The method for automatically detecting a tool-breaking tool according to claim 1, wherein in the operating step of providing an automatic detecting device, the detecting module is provided with a protective shell, a three-axis accelerometer, and an amplifying circuit. And a wireless noise detector, the three-axis acceleration gauge is connected to the amplifying circuit and is disposed in the protective casing, the wireless noise detector is also disposed in the protective casing, and the signal processing module is provided There is a wireless noise transmitter for receiving audio detected by the wireless noise detector, and the noise receiver is for receiving audio transmitted by the wireless noise transmitter. 如請求項2所述之工具機斷刀自動偵測方法及其裝置,其中在該儀器架設的操作步驟中,將該偵測模組設置於該主軸非轉子的軸承座上。The method and device for automatically detecting a tool-breaking tool according to claim 2, wherein in the operating step of the instrument erecting, the detecting module is disposed on a bearing housing of the spindle non-rotor. 如請求項2或3所述之工具機斷刀自動偵測方法及其裝置,其中在該訊號轉換的操作步驟中,當該偵測模組偵測該主軸各軸向的振動情形及所產生的音頻後,將相對應的訊號經由該放大電路放大及該無線噪音偵測器偵測後,傳送至該訊號處理模組中,由該訊號處理模組進行訊號的處理與傳送。The method and device for automatically detecting a tool-breaking tool according to claim 2 or 3, wherein in the operation step of the signal conversion, when the detecting module detects the vibration condition of each axis of the spindle and generates After the audio is amplified, the corresponding signal is amplified by the amplifying circuit and detected by the wireless noise detector, and then transmitted to the signal processing module, where the signal processing module processes and transmits the signal. 如請求項4所述之工具機斷刀自動偵測方法及其裝置,其中在該訊號轉換的操作步驟中,該轉換程式對於振動訊號進行短時距傅立葉轉換,將振動訊號的振幅-時間關係轉換成一振幅與頻率關係。The method and device for automatically detecting a machine tool broken knife according to claim 4, wherein in the operation step of the signal conversion, the conversion program performs short-time Fourier transform on the vibration signal, and the amplitude-time relationship of the vibration signal is obtained. Converted into an amplitude versus frequency relationship. 如請求項1所述之工具機斷刀自動偵測方法及其裝置,其中在該訊號轉換的操作步驟中,該轉換程式對於振動訊號進行短時距傅立葉轉換,將振動訊號的振幅-時間關係轉換成一振幅與頻率關係。The method and device for automatically detecting a machine tool broken knife according to claim 1, wherein in the operation step of the signal conversion, the conversion program performs short-time Fourier transform on the vibration signal, and the amplitude-time relationship of the vibration signal is obtained. Converted into an amplitude versus frequency relationship. 如請求項2所述之工具機斷刀自動偵測方法及其裝置,其中在該訊號轉換的操作步驟中,該轉換程式對於振動訊號進行短時距傅立葉轉換,將振動訊號的振幅-時間關係轉換成一振幅與頻率關係。The method and device for automatically detecting a machine tool broken knife according to claim 2, wherein in the operation step of the signal conversion, the conversion program performs short-time Fourier transform on the vibration signal, and the amplitude-time relationship of the vibration signal is obtained. Converted into an amplitude versus frequency relationship. 如請求項3所述之工具機斷刀自動偵測方法及其裝置,其中在該訊號轉換的操作步驟中,該轉換程式對於振動訊號進行短時距傅立葉轉換,將振動訊號的振幅-時間關係轉換成一振幅與頻率關係。The method and device for automatically detecting a machine tool broken knife according to claim 3, wherein in the operation step of the signal conversion, the conversion program performs short-time Fourier transform on the vibration signal, and the amplitude-time relationship of the vibration signal is obtained. Converted into an amplitude versus frequency relationship. 一種工具機斷刀自動偵測裝置,其係包含有一偵測模組、一訊號處理模組及一顯示模組,其中:該偵測模組係設有一保護殼、一三軸加速度規、一放大電路及一無線噪音偵測器,該三軸加速度規係與該放大電路相連接且皆設置於該保護殼內,該無線噪音偵測器亦設於該保護殼內;該訊號處理模組係與該偵測模組相連接且設有一轉換程式及一無線噪音傳輸器;以及該顯示模組係與該訊號處理模組相連接且設有一顯示器及一噪音接收器。The utility model relates to an automatic detection device for a tool-breaking knife, which comprises a detection module, a signal processing module and a display module, wherein: the detection module is provided with a protective shell, a three-axis acceleration gauge, and a An amplifying circuit and a wireless noise detector, the three-axis accelerometer is connected to the amplifying circuit and disposed in the protective casing, and the wireless noise detector is also disposed in the protective casing; the signal processing module The system is connected to the detection module and has a conversion program and a wireless noise transmitter; and the display module is connected to the signal processing module and is provided with a display and a noise receiver.
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CN105710719A (en) * 2016-01-15 2016-06-29 深圳吉兰丁智能科技有限公司 Idle running eliminating method and system and machine tool
TWI593502B (en) * 2015-11-13 2017-08-01 財團法人工業技術研究院 Cutting tool verifying system and cutting tool verifying method thereof
TWI638251B (en) * 2017-01-20 2018-10-11 國立中興大學 Modal detection system

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Publication number Priority date Publication date Assignee Title
TWI593502B (en) * 2015-11-13 2017-08-01 財團法人工業技術研究院 Cutting tool verifying system and cutting tool verifying method thereof
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CN105710719B (en) * 2016-01-15 2018-07-13 深圳吉兰丁智能科技有限公司 The idle running that disappears method and system and lathe
TWI638251B (en) * 2017-01-20 2018-10-11 國立中興大學 Modal detection system

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