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研究生:許彰印
研究生(外文):Hsu, Chang-Yin
論文名稱:球型端銑刀於高進給下加工之表面粗糙度統計模式分析
論文名稱(外文):The Analysis of Statistical Model of Surface Roughness in Ball- End Milling Under High-Feed
指導教授:戴兢志
指導教授(外文):Tai Ching-Chih
學位類別:碩士
校院名稱:大同工學院
系所名稱:機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:1997
畢業學年度:85
語文別:中文
論文頁數:64
中文關鍵詞:球型端銑刀反應曲面法
外文關鍵詞:Ball-end milling cutterResponse Surface Methodology
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利用球形端銑刀於自由曲面的加工過程中,加工後表面粗糙 度
的改善為一大問題。實際的粗糙度值和理論值並不同,且過程中 複雜
的現象不易掌握,故採用實驗規劃法以求得影響表面粗糙度之 顯著因
子和加工條件與實際粗度值之關係。本研究選擇切削速度、 進給、切
深、刀具半徑、工件傾斜度為實驗因子並利用實驗規劃法 中反應表面
法和田口法設計實驗,配合變異數分析,判定實驗因子 中的顯因,分
析結果顯示切削速度、進給、刀具半徑對於表面粗糙 度影響顯著,並
利用統計軟體的迴歸分析,以建立加工條件對於表 面粗糙度的數學模
式,以期能在不同的加工條件下預測表面粗糙度 值。經實驗驗證,本
數學模式具有良好的適用性。最後採用最佳化, 搜尋各種刀具半徑於不
同工件傾斜度時之最佳切削條件。
In the process of machining free-form surfaces, the surfaces
are often sculptured by a three-axis CNC machine with a
ball-end mill cutter. After machining, improvement on the
surface roughness becomes a considerable important
problem because the surface roughness affects the performance
and appearance of the products. In this study, experimental
factors, including cutting speed, feed, axial depth of
cut, inclination of specimen and tool radius, are taken into
consideration to investigate the effects of on the surface
roughness. To do this, the experimental design is adopted to
model the relationship between cutting conditions and surface
roughness. In the experimental design, the matrix is
planed by means of Response Surface Methodology and
Taguchi Method. The results associated with the
analysis of the variance can be practiced to assess the
prominence among experimental factors. The analysis
indicates that cutting speed, feed and tool radius play
significant factors on surface roughness. The results of
the regression analysis using a statistical software can be
applied to model the mathematical relationship between
machining factors and surface roughness. It
anticipates that the model is able to predict surface
roughness over a wide variety of cutting conditions. The model
is also proved in good agreement with experimental
results. Finally, an optimum method is adopted to search
the optimal cutting conditions with a better surface
quality under a wide variety of the tool radii and inclinations
of the specimen.
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