TWM522802U - Cutting chatter control device for processing machine - Google Patents

Description

用於加工機的切削顫振控制裝置Cutting flutter control device for processing machine

本新型是有關於一種控制裝置，特別是指一種用於加工機的切削顫振控制裝置。The present invention relates to a control device, and more particularly to a cutting flutter control device for a processing machine.

現有的加工機在對一待加工件進行切削時，由於刀具與該待加工件切削時的相對運動，偶爾會在該待加工件的表面產生週期性的波形花紋，此現象稱為顫紋，發生顫紋時，切削力量與振動量會異常增大，導致加工後的表面粗糙度大幅增加，而產生不良品，嚴重時還會導致刀具損壞，而增加維修成本。When the existing processing machine cuts a workpiece to be processed, a periodic wavy pattern is occasionally generated on the surface of the workpiece to be processed due to the relative movement of the tool and the workpiece to be machined. This phenomenon is called trembling. When trembling occurs, the cutting force and vibration amount will increase abnormally, resulting in a large increase in surface roughness after processing, resulting in defective products, which may cause damage to the tool and increase maintenance costs.

為了解決顫紋的問題，另有加工機裝設有振動感測器來監控是否發生顫振現象，一旦發現發生顫振現象，即會變更切削速度以避過會發生顫振現象的切削速度，然而，一旦發生了顫振現象，則該待加工件就必須報廢，因此此方法的成效不高。In order to solve the problem of trembling, another processing machine is equipped with a vibration sensor to monitor whether flutter occurs. Once the chattering phenomenon is found, the cutting speed is changed to avoid the cutting speed at which flutter occurs. However, once the chattering phenomenon occurs, the workpiece to be processed must be scrapped, so the effect of this method is not high.

因此，本新型之目的，即在提供一種能夠避免產生顫振的用於加工機的切削顫振控制裝置。Accordingly, it is an object of the present invention to provide a cutting flutter control apparatus for a processing machine that is capable of avoiding chattering.

於是，本新型用於加工機的切削顫振控制裝置，應用於一加工機，該加工機包括一加工頭，及一驅使該加工頭運作的驅動模組，該切削顫振控制裝置包含一儲存單元，及一控制單元。Therefore, the cutting flutter control device for a processing machine of the present invention is applied to a processing machine, the processing machine includes a processing head, and a driving module for driving the processing head, the cutting flutter control device includes a storage Unit, and a control unit.

該儲存單元儲存有複數彼此不相同的安全轉速參數，該控制單元電連接該驅動模組及該儲存單元，並包括一接收一加工指令的命令接收模組、一根據該加工指令與該等安全轉速參數進行計算以控制使該驅動模組驅使該加工頭以一目標轉速進行轉動的決策模組，該目標轉速是對應該等安全轉速參數的其中一者。The storage unit stores a plurality of safety speed parameters different from each other, the control unit is electrically connected to the driving module and the storage unit, and includes a command receiving module for receiving a processing instruction, and a safety according to the processing instruction The speed parameter is calculated to control a decision module that causes the drive module to drive the machining head to rotate at a target speed, the target speed being one of the parameters corresponding to the safe speed.

本新型之功效在於：藉由預先建立而儲存於該儲存單元中的該等安全轉速參數，及由該決策模組驅使該加工頭以能夠避免可能發生顫振的狀況的該目標轉速進行轉動，進而使加工時不會產生顫振。The effect of the present invention is that the safety rotational speed parameters stored in the storage unit are pre-established, and the processing module drives the machining head to rotate at the target rotational speed capable of avoiding a situation in which chattering may occur. In addition, chattering does not occur during processing.

參閱圖1、2，本新型用於加工機的切削顫振控制裝置之一實施例，是應用於一加工機6，該加工機6包括一加工頭61，及一驅使該加工頭62運作的驅動模組62，該驅動模組62具有一驅使該加工頭61運作的馬達621。Referring to Figures 1 and 2, an embodiment of the cutting flutter control apparatus for a processing machine of the present invention is applied to a processing machine 6, which includes a processing head 61, and a driving of the processing head 62. The driving module 62 has a motor 621 for driving the processing head 61 to operate.

該切削顫振控制裝置包含一儲存單元2、一控制單元3，及一收音單元4。The cutting flutter control device comprises a storage unit 2, a control unit 3, and a sound pickup unit 4.

該儲存單元2儲存有複數彼此不相同的安全轉速參數21。於本實施例中，該等安全轉速參數21的數量為三。The storage unit 2 stores a plurality of safe rotational speed parameters 21 that are different from each other. In this embodiment, the number of the safe rotational speed parameters 21 is three.

該控制單元3電連接該驅動模組62及該儲存單元2，並包括一接收一加工指令的命令接收模組31、一根據該加工指令與該等安全轉速參數21進行計算以控制使該驅動模組62驅使該加工頭61以一目標轉速進行轉動的決策模組32、一模型建立模組33，及一模型修正模組34。The control unit 3 is electrically connected to the driving module 62 and the storage unit 2, and includes a command receiving module 31 for receiving a processing command, and calculating according to the processing command and the safety speed parameter 21 to control the driving. The module 62 drives the decision module 32, the model building module 33, and a model correction module 34 for rotating the processing head 61 at a target rotational speed.

該加工指令具有一預設轉速參數。於本實施例中，該命令接收模組31是一種人機介面模組，該加工指令是使用者於該命令接收模組31手動輸入，但也可以是以加工程式的形式提供給該命令接收模組31。The machining command has a preset speed parameter. In this embodiment, the command receiving module 31 is a human-machine interface module. The processing command is manually input by the user in the command receiving module 31, but may also be provided in the form of a processing program to receive the command. Module 31.

該收音單元4設置於該加工機6以量測一加工聲音訊號。於本實施例中，該收音單元4為麥克風。The sounding unit 4 is disposed in the processing machine 6 to measure a processed sound signal. In this embodiment, the sound pickup unit 4 is a microphone.

使用時，該模型建立模組33預先根據該加工頭61於不同的轉速、不同的加工深度及相對應的馬達621的馬達力矩電流進行頻譜分析後計算得出該等安全轉速參數21。In use, the model building module 33 pre-calculates the safe rotational speed parameter 21 according to the frequency analysis of the machining head 61 at different rotational speeds, different machining depths, and corresponding motor torque currents of the motor 621.

由於該馬達621在驅動該加工頭61分別以不同的轉速及不同的加工深度的條件下進行運作時，會產生相對應的馬達力矩電流，將量測到的馬達力矩電流進行頻譜分析後，即可得出如圖2的一加工深度及轉速曲線5，其中橫軸代表轉速，縱軸代表加工深度，每一個波峰處代表在不同的轉速下可進行的最深的加工深度，位於該加工深度及轉速曲線5上方的區域是代表會發生顫振的顫振區51，而位於該加工深度及轉速曲線5下方的區域則是代表不會發生顫振的穩定區52，因此該等安全轉速參數21即是對應每一個波峰處的轉速。於本實施例中，該等安全轉速參數21分別為2000rpm、2280rpm，及2630rpm。Since the motor 621 is operated under the condition that the machining head 61 is driven at different rotation speeds and different machining depths, a corresponding motor torque current is generated, and after the measured motor torque current is subjected to spectrum analysis, A machining depth and speed curve 5 as shown in Fig. 2 can be obtained, wherein the horizontal axis represents the rotational speed, the vertical axis represents the machining depth, and each peak represents the deepest machining depth that can be performed at different rotational speeds, at the machining depth and The area above the speed curve 5 is a dithering area 51 representing chattering, and the area below the machining depth and speed curve 5 is a stable area 52 representing no chattering, so the safe speed parameter 21 That is, the speed corresponding to each peak. In this embodiment, the safe rotational speed parameters 21 are 2000 rpm, 2280 rpm, and 2630 rpm, respectively.

而在開始進行加工作業時，該決策模組32根據該預設轉速參數與該等安全轉速參數21進行比較，並將該目標轉速定為對應該等安全轉速參數21中最接近且不低於該預設轉速參數的一者。When the processing operation is started, the decision module 32 compares the preset speed parameter with the safe speed parameter 21, and sets the target speed to be the closest and not lower than the corresponding safe speed parameter 21. One of the preset speed parameters.

於本實施例中，該預設轉速參數為1850rpm，該決策模組32即會將該目標轉速定為2000rpm，並控制使該驅動模組62驅使該加工頭61以該目標轉速進行轉動，因此，可進行的加工深度就能夠增加，而避免可能發生顫振的狀況。In this embodiment, the preset rotation speed parameter is 1850 rpm, and the decision module 32 sets the target rotation speed to 2000 rpm, and controls the driving module 62 to drive the machining head 61 to rotate at the target rotation speed. The depth of processing that can be performed can be increased while avoiding the possibility of chattering.

另外，為了避免在加工時發生預期外的顫振狀況，該模型修正模組34根據即時量測的該加工聲音訊號及該加工頭61的實際轉速進行頻譜分析後修正該等安全轉速參數21。In addition, in order to avoid the occurrence of the expected flutter condition during processing, the model correction module 34 performs spectrum analysis on the instantaneously measured processed sound signal and the actual rotational speed of the processing head 61 to correct the safe rotational speed parameter 21.

由於發生顫振時，同時會伴隨異常聲響，因此透過該收音單元4即時量測該加工聲音訊號，並經過頻譜分析後即能得知目前的加工轉速是否會發生顫振，若分析後代表會發生顫振，則代表目前的安全轉速參數21不適當，因此即可修正對應的安全轉速參數21以供後續使用。Since the fluttering is accompanied by an abnormal sound, the processing sound signal is measured instantaneously through the sounding unit 4, and after the spectrum analysis, it can be known whether the current processing speed will be fluttered, and if it is analyzed, the representative will If chattering occurs, it means that the current safe speed parameter 21 is not appropriate, so the corresponding safe speed parameter 21 can be corrected for subsequent use.

綜上所述，藉由該模型建立模組33預先建立而儲存於該儲存單元2中的該等安全轉速參數21，及由該決策模組32驅使該加工頭61以能夠避免可能發生顫振的狀況的該目標轉速進行轉動，進而使加工時不會產生顫振，並且還能透過該收音單元4及該模型修正模組34即時修正該等安全轉速參數21而確保排除預期外的顫振狀況，故確實能達成本新型之目的。In summary, the safety speed parameter 21 stored in the storage unit 2 is pre-established by the model building module 33, and the processing head 61 is driven by the decision module 32 to avoid possible chattering. The target rotational speed of the condition is rotated, so that no flutter is generated during processing, and the safe rotational speed parameter 21 can be corrected immediately by the sound pickup unit 4 and the model correction module 34 to ensure that the expected external chatter vibration is eliminated. The situation, so it is indeed possible to achieve the purpose of this new type.

惟以上所述者，僅為本新型之實施例而已，當不能以此限定本新型實施之範圍，凡是依本新型申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本新型專利涵蓋之範圍內。However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

2‧‧‧儲存單元
21‧‧‧安全轉速參數
3‧‧‧控制單元
31‧‧‧命令接收模組
32‧‧‧決策模組
33‧‧‧模型建立模組
34‧‧‧模型修正模組
4‧‧‧收音單元
5‧‧‧加工深度及轉速曲線
51‧‧‧顫振區
52‧‧‧穩定區
6‧‧‧加工機
61‧‧‧加工頭
62‧‧‧驅動模組
621‧‧‧馬達2‧‧‧ storage unit
21‧‧‧Safety speed parameters
3‧‧‧Control unit
31‧‧‧Command receiving module
32‧‧‧Decision module
33‧‧‧Model building module
34‧‧‧Model Correction Module
4‧‧‧ Radio unit
5‧‧‧Processing depth and speed curve
51‧‧‧ flutter zone
52‧‧‧ stable zone
6‧‧‧Processing machine
61‧‧‧Processing head
62‧‧‧Drive Module
621‧‧‧Motor

本新型之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中： 圖1是本新型用於加工機的切削顫振控制裝置的一實施例的系統方塊圖；及 圖2是該實施例的一加工深度及轉速曲線圖。Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a system block diagram of an embodiment of the cutting flutter control apparatus for a processing machine; 2 is a plot of the machining depth and the rotational speed of this embodiment.

2‧‧‧儲存單元 2‧‧‧ storage unit

21‧‧‧安全轉速參數 21‧‧‧Safety speed parameters

3‧‧‧控制單元 3‧‧‧Control unit

31‧‧‧命令接收模組 31‧‧‧Command receiving module

32‧‧‧決策模組 32‧‧‧Decision module

33‧‧‧模型建立模組 33‧‧‧Model building module

34‧‧‧模型修正模組 34‧‧‧Model Correction Module

4‧‧‧收音單元 4‧‧‧ Radio unit

6‧‧‧加工機 6‧‧‧Processing machine

61‧‧‧加工頭 61‧‧‧Processing head

62‧‧‧驅動模組 62‧‧‧Drive Module

621‧‧‧馬達 621‧‧‧Motor

Claims (4)

一種用於加工機的切削顫振控制裝置，應用於一加工機，該加工機包括一加工頭，及一驅使該加工頭運作的驅動模組，該切削顫振控制裝置包含： 一儲存單元，儲存有複數彼此不相同的安全轉速參數；及 一控制單元，電連接該驅動模組及該儲存單元，並包括一接收一加工指令的命令接收模組、一根據該加工指令與該等安全轉速參數進行計算以控制使該驅動模組驅使該加工頭以一目標轉速進行轉動的決策模組，該目標轉速是對應該等安全轉速參數的其中一者。A cutting flutter control device for a processing machine is applied to a processing machine, the processing machine includes a processing head, and a driving module for driving the processing head, the cutting flutter control device comprises: a storage unit, Storing a plurality of safe speed parameters different from each other; and a control unit electrically connecting the drive module and the storage unit, and including a command receiving module for receiving a machining command, a safety command speed according to the machining command The parameter is calculated to control a decision module that causes the drive module to drive the machining head to rotate at a target speed, the target speed being one of a corresponding safety speed parameter. 如請求項1所述的用於加工機的切削顫振控制裝置，其中，該加工指令具有一預設轉速參數，該決策模組根據該預設轉速參數與該等安全轉速參數進行比較，並將該目標轉速定為對應該等安全轉速參數中最接近且不低於該預設轉速參數的一者。The cutting flutter control device for a processing machine according to claim 1, wherein the machining instruction has a preset rotation speed parameter, and the decision module compares the preset rotation speed parameter with the safety rotation speed parameter, and The target speed is determined to be one of the closest and not lower than the preset speed parameters of the equal safety speed parameter. 如請求項1所述的用於加工機的切削顫振控制裝置，其中，該驅動模組具有一驅使該加工頭運作的馬達，該控制單元還包括一模型建立模組，該模型建立模組預先根據該加工頭於不同的轉速、不同的加工深度及相對應的馬達的馬達力矩電流進行頻譜分析後計算得出該等安全轉速參數。The cutting flutter control device for a processing machine according to claim 1, wherein the driving module has a motor for driving the processing head, the control unit further comprising a model building module, the model building module The safety speed parameters are calculated according to the spectrum analysis of the processing head at different rotational speeds, different machining depths and corresponding motor torque currents of the motor. 如請求項3所述的用於加工機的切削顫振控制裝置，還包含一設置於該加工機以量測一加工聲音訊號的收音單元，該控制單元還包括一模型修正模組，該模型修正模組根據該加工聲音訊號及該加工頭的實際轉速進行頻譜分析後修正該等安全轉速參數。The cutting flutter control device for a processing machine according to claim 3, further comprising a sounding unit disposed in the processing machine to measure a processed sound signal, the control unit further comprising a model correction module, the model The correction module corrects the safety speed parameters according to the processed sound signal and the actual rotational speed of the processing head.