- 學位論文
新線上顫振監控系統與切削穩定圖輔佐抑制顫振之研究
A New On-Line Chatter Monitoring Control System and A Study of Using Stability Lobe Diagrams to Supress Chatter.
摘要
本研究透過實際銑削實驗擷取振動加速度，分析顫振發生時的時域與頻域振動變化，藉由暫態訊號變化分析與頻譜分析雙重門檻，制訂顫振判斷法則，同時利用切削穩定圖輔助判斷切削條件是否在顫振區內，以提高判斷準確度。在抑制顫振方面，為了讓顫振抑制更有效率，乃建立了以切削穩定圖直接辨識抑制顫振切削轉速的方法，使可一次性抑制顫振。研究中也透過TCP/IP通訊協定建立控制器雙向資料傳輸擷取模組，達到即時監視與控制功能。根據發展之方法，除了PLC是在Visual C++環境下編譯外，研究中以Visual C#建立整體監控系統，可進行CNC控制器資料傳輸、記錄即時振動訊號與切削異常資訊、繪製切削穩定圖模型與線上即時監控顫振等功能。實驗結果顯示，該系統可以快速準確發現顫振並作即時抑制。
並列摘要
Through this study, the actual milling experiment to capture the vibration acceleration, time domain and frequency domain analysis of vibration changes flutter occurs, the signal changes by transient analysis and spectrum analysis dual threshold formulate chatter judgment rule, while taking advantage of cutting stability diagram auxiliary determine whether the cutting conditions in the region chatter to improve the accuracy of judgment. In terms of inhibition of chatter, chatter suppression in order to allow more efficient, is to establish a stable figure in cutting chatter direct identification method for inhibiting the cutting speed to make a one-time suppress chatter. Research has also established a two-way data transfer controller capture module, to achieve real-time monitoring and control functions via TCP / IP protocol. The method of development, in addition to PLC is compiled, the research to Visual C # to establish the overall monitoring system in Visual C ++ environment, can be CNC controller data transmission, recording real-time vibration signal and cutting unusual information, draw cutting stability graph model and online chatter real-time monitoring and other functions.According to experimental results, show that the system can quickly and accurately find and make immediate chatter suppression.