切削顫振之順滑模式及遠端監控之研究

The Study of Sliding Mode and Remote Control for Milling Chatter

謝祥永(Hsiang-Yung Hsieh)

指導教授 ： 王世明

中原大學/工學院/機械工程研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400575

摘要

顫振(chatter)為切削加工上一直是最令人頭痛的一件事，顫振的發生直接影響工件之表面粗糙度，對於刀具、CNC工具機、製造良率上都有相當的影響。長久以來一直無法直接建立一套公認且方便好用之方法來避免銑削加工中顫振(chatter)的發生。本研究主要分成四部份：網路監控系統、訊號擷取系統、顫振偵測系統、顫振抑制制系統、。訊號擷取系統是利用Labview程式語言撰寫訊號擷取程式搭配NI公司之DAQ卡（PCI-MIO-16E-4）、SC-2345動態訊號擷取盒、切削動力計、位移計蒐集切削時所產生之切削力與振動位移。顫振判斷系統是對訊號擷取系統所蒐集之切削力與振動位移進行系統鑑別以建構切削力模型與顫振模型，依據順滑控制理論建立一超平面（hyperplane），以訊號是否落入順滑層中為依據判斷是否穩定，所以此為定性分析是否發生顫振。顫振抑制制系統，是以降低刀具每刃進給量為依據以提升主軸轉速為方法，由SC-2345動態訊號擷取盒輸入所需之電壓至主軸馬達中產生不同的轉速產生不同相位之振動波紋以消耗刀具中所累積之能量。最後利用本研究室既有之AXIS2120網路攝影機、AXIS2191語音模組、訊號擷取系統整合成網路監控系統使得使用者可以在遠端利用IE瀏覽器即可了解工件加工是否順利、是否發生顫振、刀具使用情形等等…….。該遠端監控將利用訊號擷取系統與網路攝影機蒐集感測器訊號與加工實際影像，使得在遠端的研發人員可以透過網路更能掌握狀況及時處理問題、排除故障。

關鍵字

順滑模態 ； 順滑層 ； 顫振偵測 ； 網路遠端控制 ； 顫振抑制

並列摘要

Milling chatter has long been the serious problem deteriorating the machining accuracy. It is necessary to develop a reliable and stable chatter detecting and suppressing system to enhance the machining performance. In this study, four sub-systems are developed: internet remote control system, signal collecting and processing system, chatter detecting system, and chatter suppression system. Signal collecting system was developed with Labview software to on-line collect the cutting forces and the vibration displacement. Adopting Sliding Mode control theory with system identification, a hyper plane was built to monitoring the occurrence of chatter during machining process. When the chatter is detected, the suppression will increase spindle speed and reduce the chip load to stabilize the cutting dynamics. The system will automatically generate input signal for spindle motor through SC-2345 dynamic signal processing card to dissipate the cutting energy to suppress the chatter. Finally, the developed sub-systems were integrated as one system, and an internet remote monitoring system that can remote monitoring the machining process through the web camera and detected signals was also developed. Several cutting experiments were conducted to verify the effectiveness of the integrated system. The experimental results have shown that the system can effectively detect the chatter and improve the machining accuracy by suppressing the chatter

並列關鍵字

sliding mode ； chatter suppression ； chatter detecting ； internet remote control ； sliding layer

參考文獻

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