研究生: |
徐智誠 Chih-Cheng Hsu |
---|---|
論文名稱: |
以球擠光與球拋光製程作塑膠模具用鏡面不銹鋼之自動化表面精加工研究 Automated Surface Finish of Plastic Mold Used Mirror-Like Stainless Steel Using Ball Burnishing and Spherical Polishing Processes |
指導教授: |
林正平
Chang-Pin Lin 陳炤彰 Chao-Chang A. Chen 修芳仲 Fang-Jung Shiou |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 182 |
中文關鍵詞: | 球拋光 、熱處理 、球擠光 、研磨 、田口式實驗計畫法 、L18直交表 、表面粗糙度 、變異數分析(ANOVA) |
外文關鍵詞: | ball burnishing process, analysis of variation (ANOVA), optimal ball polishing parameters, Taguchi's matrix experiments, ball polishing process |
相關次數: | 點閱:712 下載:13 |
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本論文之目的為在CNC切削中心機上發展一自動化球拋光加工製程(Spherical-polishing process),以田口實驗方法決定STAVAX塑膠模具用鏡面不銹鋼之最佳擠光與拋光參數,並將其應用於以逆向工程所建構的自由曲面鏡片模仁做表面精加工之研究。其間材料試件經粗、精銑削(Fine milling)、熱處理、研磨及球擠光(Ball-burnishing)等前置加工後,再施以拋光加工來改善試件之表面粗糙度狀況。
研究中將使用田口實驗計劃法之L9及L18直交表,分別對擠光與拋光加工平面做田口實驗、變異數分析(ANOVA)與全因子實驗,以探討各加工參數對於表面粗糙度的影響,期能找出最佳化之平面擠光與拋光參數,並整合研磨、擠光與拋光加工系統,應用於所建構之F-theta掃描透鏡載具上,以探討各加工面之粗糙度改善情形。
根據本研究之製程對於平面擠光與拋光加工,可使研磨後之表面粗糙度值0.5167μm(Ra)經擠光加工後可改善至0.123μm(Ra),再經拋光後可改善至0.0168μm(Ra)、0.2134μm(Rmax)。而將最佳研磨、擠光與拋光參數應用於F-theta自由曲面上,其拋光後可改善至0.035μm(Ra)、0.268μm(Ry)。
The objective of this research is to improve surface roughness of heat-treated STAVAX plastic mold stainless steel using the ball grinding, ball burnishing and ball polishing surface finish processes on a machining center. The design and manufacture of the ball alignment device, slurry circulatory system, and a polishing tool including a high-speed grinder mounted with a felt ball and its holder were first accomplished in this study. The optimal plane surface burnishing and polishing parameters have been determined after conducting the Taguchi’s L9 and L18 matrix experiments, analysis of variation (ANOVA), and the full factorial experiment respectively. The surface roughness of the test specimens could be improved from about Ra 0.5167μm to Ra 0.123μm in average using the optimal plane surface ball burnishing parameters. Surface roughness of the burnished specimen can be further improved to Ra 0.0168μm (Rmax 0.2134μm) using the optimal plane surface ball polishing process with determined optimal plane surface polishing parameters. Applying the optimal plane surface ball grinding, ball burnishing and ball polishing parameters sequentially to a fine milled freeform surface carrier of a F-theta scan lens, the surface roughness of Ra 0.035μm (Ry 0.268μm) on the freeform surface is obtainable.
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