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系統識別號 U0026-0812200914000768
論文名稱(中文) 硬脆材料微銑削加工特性之探討
論文名稱(英文) Investigation of process characteristics in micro milling of brittle materials
校院名稱 成功大學
系所名稱(中) 機械工程學系碩博士班
系所名稱(英) Department of Mechanical Engineering
學年度 95
學期 2
出版年 96
研究生(中文) 許芳明
研究生(英文) Fang-Ming Hsu
電子信箱 n1694166@ccmail.ncku.edu.tw
學號 n1694166
學位類別 碩士
語文別 中文
論文頁數 65頁
口試委員 口試委員-李榮顯
指導教授-王俊志
口試委員-林昌進
中文關鍵字 銑削力  比切削係數  表面粗糙度  硬脆材料  臨界切深 
英文關鍵字 specific coefficients  brittle materials  surface roughness  critical depth of cut  cutting force 
學科別分類
中文摘要 本文主要在探討微銑削的方法下,刀具幾何與每刃進给對比切削係數及加工面品質之影響。比切削係數的辨識是以銑削捲積力模式之解析式為基礎代入加工條件及實驗所得的平均銑削力來達成。
本文選用玻璃(Soda-lime) 及鋁(Al6061-T6)作為實驗材料,
觀察在不同平均切屑厚度之順、逆銑加工中,比切削係數的變化趨勢。實驗結果發現,玻璃與鋁,順、逆銑時,剪切力之切向比切削係數 與剪切力之徑向比切削係數 隨平均切屑厚度變小有上升的趨勢,犁切力之切向比切削係數 與犁切力之徑向比切削係數 隨平均切屑厚度變小差異不大。玻璃在順、逆銑時,若將總切向銑削力分為剪切力之切向力與犁切力之切向力,發現銑削玻璃時,犁切力之切向力約佔總切向銑削力80%、剪切力之切向力佔總切向銑削力20%,而加工延性材料鋁則發現,犁切力之切向力約佔總切向銑削力50%、剪切力之切向力佔總切向銑削力50%。玻璃順銑時,加工後的延性表面粗糙度值Ra為2~8 nm、臨界切深為52 nm。
英文摘要 This thesis investigates the effect of tool geometry and feed per tooth respectively on cutting coefficients and surface quality in mirco milling . Based on the analytical nature of convolution milling force model, the cutting coefficients can be identified by substituting the milling conditions and the average milling force into the force model.
The experiments were performed with soda-lime glass and Al6061-T6 to observe the effects of average chip thickness to the cutting constants during up and down milling operation. The results show that tangential cutting coefficient for the shearing and radial cutting coefficient for the shearing rise with decrease average chip thickness . The tangential cutting coefficient for the plowing and radial cutting coefficient for the plowing are still constant with differential average chip thickness.
The tangential force for the plowing is 0.8 times the cutting force in tangential direction and the tangential force for the shearing is 0.2 times the cutting force in tangential direction between up and down milling in soda-lime glass.Furthermore, the tangential force for the plowing is 0.5 times the cutting force and the tangential force for the shearing is 0.5 times the cutting force in tangential between up and down milling in Al6061-T6.The surface roughness is within 2~8 nm and the critical depth of cut (C.D.C) is 52 nm in soda-lime glass.
論文目次 中文摘要 ..............................................I
英文摘要 ..............................................II
誌 謝..................................................III
總目錄.................................................IV
表目錄.................................................VII
圖目錄.................................................VIII
符號說明 ..............................................XII
第一章 緒論...........................................1
1.1前言.......................................1
1.2研究動機...................................2
1.3研究目的...................................3
1.4文獻回顧...................................3
1.5研究範疇及論文架構.........................5
第二章 微銑削之銑削力模式 ............................7
2.1前言.......................................7
2.2銑削座標系統...............................7
2.2.1銑削座標系統.............................9
2.2.2局部銑削力...............................11
2.3 剪切、犁切局部銑削式......................12
2.3.1 刀具側邊之局部銑削力模..................13
2.3.2單刃總銑削力.............................15
2.3.3屑寬密度函數.............................16
2.3.4刀刃序列函數.............................17
2.3.5 總銑削力................................18
第三章 微銑削實驗.....................................19
3.1前言.......................................19
3.2實驗設備...................................20
3.3動態微銑削力校正...........................22
3.4三軸向壓電感測器與微動力計銑削力比較.......24
第四章 Soda-lime glass 與Al 6061-T6之比切削係數實驗...26
4.1實驗目的...................................26
4.2半槽銑、順銑加工玻璃實驗...................27
4.2.1 Soda-lime glass-表面粗糙度..............39
4.3半槽銑、逆銑加工玻璃實驗...................41
4.4半槽銑、順銑加工Al 6061-T6實驗.............48
4.5半槽銑、逆銑加工Al 6061-T6實驗.............55
第五章 結論與建議......................................60
5.1 結論......................................60
5.2 建議......................................62
參考文獻...............................................63
自述...................................................65
參考文獻 [1] M. E. Martellotti, “An Analysis of the Milling Process,”Transaction of ASME, Vol. 63, pp. 677-700, 1941.
[2] M. E. Martellotti, “An Analysis of the Milling Process, Part 2: Down Milling,” Transaction of ASME, Vol. 67, pp. 233-251, 1945.
[3] F. Koenigsberger and J. A. P. Sabberwal, “An Investigation International ournal of Machine Tool Design and Research”, Vol. 1, pp. 15-33, 1961.
[4] A. J. P. Sabberwal, “Chip Section and Cuting Force During the Milling peration,“ Annals of the CIRP, Vol. 10, pp. 197-203, 1961.
[5] T.G. Bifano, T.A. Dow,and R.D. Scattergood, “Ductile-Regime Grinding, Anew Technology for Machining Brittle Materials,” ASME Journal of Engineering for lndustry, Vol.133, pp.184-189,1991.
[6] Kui Liu and Xiaoping Li, “Nanometer-Scale Ductile Cutting of Tungsten Carbide,”Journal of Manufacturing Processes, Vol. 6, pp.187-195, 2004
[7] K. Liu, X.P. Li, “Ductile cutting of tungsten carbide”, Journal of Materials Processing Technology, Vol.113, pp.348-354, 2001
[8] J. J. Junz Wang and C. M. Zang, "An analytical force model with hearing and ploughing mechanisms for end milling," Journal of achine tools and manufacture, Vol. 42, pp. 761-771, 2002
[9] John Mauro, “Hardnessand Toughness,” CES 305: Laboratory Experiment #7, NYS College of Ceramics, 1999
[10] J.J. Wang, S.Y. Liang and J.W. Book, “Convolution analysis of Milling Force Pulsation,“ ASME Journal of Engineering for Industry, Vol. 116, pp. 17-25, 1994
[11] 郭銘修,銑削條件與刀具幾何對比切削係數影響之研究,
成功大學,機械工程研究所碩士論文,九十五年。
[12] 鄭嘉敏,考慮剪切及犁切效應之通用銑削力模式及其在判 認比切削係數、偏心幾何及穩定性預測上之應用,國立成功大學, 機械工程研究所博士論文,九十一年。
[13] H. Schulz and T. Moriwaki,“High-Speed Machining”, Annals of the CIRP, Vol. 41, pp.637, 1992
[14] O.Zw rner, H. H lscher*, U.D.Schwarz, R. Wiesendanger, “The velocity dependence of frictional forces in point-contact friction,”Applied Physics A Materials Science ﹠Processing,A 66, s263-267, 1998
[15] Nikhil S Tambe and Bharat Bhushan, “Friction modle for the velocity dependence of nanoscale friction”, Nanotechnology, Vol. 16, pp. 2309-2324, 2005
[16] Siva Venkatachalam and Steven Y. Liang, “Effect of Ploughing Forces and Friction Coefficient in Microscale Machinng”,Transactions of the ASME, Vol. 129, pp. 274-280, 2007
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