臺灣博碩士論文加值系統

CAD/CAM的加工方式已被廣泛的應用在義齒的贗複技術上，然而現有的三軸加工方式應用於複雜的3D曲面上仍有加工上的限制，五軸加工方式則較三軸有較高的材料移除率、良好加工表面以及減少手動修型等優點。因此本論文使用特殊的五軸加工平刃與尖刃刀具，以不同的刀具直徑或刀具傾角及不同的鑽石磨粒粒度大小，，研究可切削陶瓷(Vita Mark Ⅱ)的切削特性。主要的切削參數為進給速度及切深，實驗結果顯示，透過陶瓷工件的表面微觀檢測(SEM)與表面粗糙度，可確定齒材與參數間的被削性關係，並找出適用的刀具與切削參數，以供實際加工時使用。

Dental CAD/CAM system has been commonly used while the current three-axis dental CAD/CAM system cannot achieve complex shapes. The five-axis machining of sculptured surface offers many advantages, including faster material removal rates, improved surface finish and elimination of hand finish. The machining data for five-axis numerical control (NC) machining were investigated in this study using special flat-end and sharp-end tools coated with diamond abrasives of different grit sizes. The major machining parameters include feed rate and depth of cut. The dental ceramics selected for this study was Vita MarkⅡ. The surface conditions of ceramics are analyzed with SEM and the surface profiler. The relations between surface roughness and machining parameters were found. The experimental results reveal the suitable machining data for five-axis dental CAD/CAM system. Principles of tool and machining conditions selection were suggested as well. The obtained results can be used in the five-axis dental system.

中文摘要……………………………………………………Ⅰ
英文摘要……………………………………………………Ⅱ
謝誌…………………………………………………………Ⅲ
目錄…………………………………………………………Ⅳ
表目錄………………………………………………………Ⅶ
圖目錄………………………………………………………Ⅷ
第一章 導論……………………………………………….1
1.1 研究背景…………………………………………..1
1.2 五軸加工…………………………………………..2
1.3 陶瓷材料簡介……………………………………..4
1.4 陶瓷切削特性……………………………………..6
第二章 文獻回顧………………………………………….8
2.1 高純度氧化鋁陶瓷………………………………..8
2.2 鑽石磨粒………………………………………….10
2.3 銑削理論………………………………………….13
2.4 磨削理論………………………………………….15
2.5 陶瓷破壞與缺陷………………………………….17
第三章 實驗方法…………………………………………20
3.1 實驗設置………………………………………….21
3.2實驗架構與參數設定……………………………..29
3.2.1 實驗方式……………………………………..30
3.2.2 機台參數控制………………………………..31
3.2.3 切削方式……………………………………..32
3.2.4 切削起始點…………………………………..33
3.2.5 實驗流程……………………………………..34
3.3 實驗參數………………………………………….36
3.3.1 粗加工………………………………………..36
3.3.2 精加工………………………………………..38
第四章 切削特性…………………………………………40
4.1 決定塊材修整起始點…………………………….40
4.1.1 周刃切削加工………………………………..41
4.1.2 端刃切削加工………………………………..42
4.2 進給速率與表面粗糙度………………………….43
4.2.1 粗加工………………………………………..43
4.2.2 精加工………………………………………..47
4.3 切深與表面粗糙度……………………………….50
4.4 刀具直徑與表面粗糙度…………………………55
4.5 刀具傾角與表面粗糙度…………………………58
4.6 鑽石磨粒粒度大小與表面粗糙度………………61
4.7 刀具與切削參數選用原則………………………66
第五章 加工不良與刀具磨耗…………………………...68
5.1 缺陷情形討論……………………………………68
5.2刀具磨耗………………………………………….73
第六章 結論……………………………………………...77
參考文獻……………………………………………………79

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