本論文探討微銑削加工製程中結構剛性與製程阻尼對軸向切深之關係以及對銑削穩定性之影響。本文首先以銑削力模式為基礎，配合刀具撓曲模式針對不同軸向切深下之刀具剛性變化進行探討；再以動態銑削模式進行穩定性之探討，並延伸至奈氏軌跡圖與實驗結果搭配定義出不同加工條件下之製程阻尼，且由實驗結果可得知在微銑削加工製程中刀具剛性與製程阻尼之變化為影響系統加工穩定性之重要因素。根據相同模式，由實驗結果發現微銑削加工在軸向切深超過臨界切深發生系統不穩定現象後，其不穩定現象與軸向切深呈非線性關係，即在大於臨界切深之加工條件下，亦可選擇到適當加工參數達到穩定切削條件並可兼顧加工效率。經理論分析與實驗驗證後，本研究進一步探討微銑削穩定性對刀具壽命之影響，由實驗得知系統發生不穩定現象後，軸向切深越小時因刀具剛性及製程阻尼之影響導致刀具的不穩定振動情形越嚴重，進而加速刀具磨耗影響其刀具壽命。最後，利用本文模式進行穩定性預測並與穩定耳垂圖進行比較，進而可得考慮刀具剛性與製程阻尼變化之微銑削穩定耳垂圖。

This study examines the effect of tool stiffness and process damping on axial cutting depth and milling stability in micro-end milling. In this paper, the tool deflection model was used to examine the variation of tool stiffness under different axial cutting depth. The result of the experiment was combined with nyquist contour to define process damping under different axial cutting depth. The tool stiffness and process damping were found to be dominant in affecting the stability of micro-end milling. Previous experiment showed that micro-end milling would get unstable as axial cutting depth exceeds critical cutting depth. However, the instability of the system wasn’t in a linear relationship with axial cutting depth. In other words, when axial cutting depth exceeds critical cutting depth, the system can still achieve stability and good efficiency with proper choice of axial cutting depth. Furthermore, the study used the model to examine the effect of the milling stability on the tool life span. From the experiment, it was found that as the axial cutting depth gets smaller, the effect of tool stiffness and process damping on the tool instability gets more serious and thus affects the life span of tool. Last, this study utilized different tool stiffness and process damping on axial cutting depth and milling stability in micro-end milling stability lobes.

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彭仕良，撓件銑削加工尺寸誤差及自動補償之研究，國立成功大學機械工程學系，八十四年碩士論文

江榮華，微銑削刀具疲勞斷裂之探討，國立成功大學機械研究所，一百年碩士論文