本論文將球拋光機構架設於CNC立式切削中心機上，發展一套近似液動壓拋光加工製程，進行非接觸式液動壓拋光加工研究，並以改善硬化處理後STAVAX不生鏽塑膠模具鋼之表面粗糙度；研究中利用CFD流場計算力學軟體作液動壓拋光流場模與分析，並進行田口式實驗計劃法與結果探討，彙整各控制因子對液動壓拋光之影響程度，最後應用於鏡面模仁表面拋光加工，達到非接觸式微量拋光目的。
本研究以田口式實驗計劃法對STAVAX不生鏽塑膠模具鋼找出液動壓拋光最適加工參數，經驗證實驗結果得知最適加工參數組合為：薄膜厚度4 μm、刀具主軸轉速15,000 rpm、切削液混合比例100 %與進給0.5 mm/min；先後利用平面擠光與最適液動壓拋光參數加工後，其表面粗糙度值為0.008 μm（Ra）；而在鍍鎳鏡面模仁上之應用，微量拋光加工後之試件表面粗糙度為1.7 nm（Ra），且能有效移除鏡面模仁上之鑽石車削刀痕。

The objective of this research is to develop a quasi hydrodynamic polishing process using a ball polishing tool, to improve the surface roughness of the hardened and tempered STAVAX plastic mold stainless steel on a CNC machining center. A set of computational fluid dynamics（CFD）software was used to analyze and simulate the shear stress and velocity of the fluid between the fluid and the workpiece for hydrodynamic polishing in this research. The optimal process parameters for hydrodynamic polishing have been determined by the Taguchi’s experimental method. The determined optimal quasi hydrodynamic polishing parameters for plane surface were as follows: the film thickness of 4 μm, the spindle speed of 15,000 rpm, the percentage of metalworking oil of 100 %, and the feed rate of 0.5 mm/min. Using the determined optimal quasi hydrodynamic polishing parameters, the surface roughness of the burnished test specimens could be improved from 0.02 μm（Ra）on average to 0.008 μm（Ra）on average. Applying the optimal quasi hydrodynamic polishing parameters to a diamond turning fabricated Ni-plated STAVAX mold steel, the surface roughness of 0.0017 μm（Ra）on average was possible. In addition, the turned concentric lay on the mirror-like surface could be removed by the developed process efficientiy.

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