使用磨料流拋光在中心加工機上對金屬玻璃表面進行精加工之研究

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研究生：	阮海燈 Nguyen - Hai Dang
論文名稱：	使用磨料流拋光在中心加工機上對金屬玻璃表面進行精加工之研究 Surface finish of the bulk metallic glass using abrasive jet polishing process on the machining center
指導教授：	修芳仲 Fang- Jung Shiou
口試委員:	鄧昭瑞 Geo-Ry Tang 許巍耀 Wei-Yao Hsu
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：	2011
畢業學年度：	99
語文別：	英文
論文頁數：	81
中文關鍵詞：	Abrasive jet polishing 、bulk metallic glass 、Taguchi method 、orthogonal array 、ANOVA
外文關鍵詞：	Abrasive jet polishing, bulk metallic glass, Taguchi method, orthogonal array, ANOVA
相關次數：	點閱：210 下載：4
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This thesis aims to investigate the optimal abrasive jet polishing parameters for Zr-based bulk metallic glass (BMG) material by using the Taguchi method. An abrasive jet polishing (AJP) system has been newly designed and installed on a machining center. In order to determine the optimal polishing parameters for the BMG sample, four polishing parameters, namely the hydraulic pressure, the impact angle, the stand-off distance, and the polishing time were chosen as the factors of experiments. The optimal AJP parameters have been determined after carrying out the experiments based on the Taguchi’s L9 orthogonal array experimental results. These optimal parameters are the combination of the hydraulic pressure of 2 kg/cm2, the impact angle of 50o, the stand-off distance of 15 mm, and the polishing time of 60 minutes. The surface roughness can be improved from about Ra 0.13 μm to 0.044 μm by using the AJP optimal parameters. Besides, an analysis of variation (ANOVA) of the experimental data indicated that the polishing time and hydraulic pressure was the dominant parameters of the AJP process for the BMG material.

Abstract	i
Acknowledgements	ii
Table of Contents	iii
List of Figures	vi
List of Tables	ix
Chapter 1 INTRODUCTION	10
1 Research motivation	10
2 Literature review	10
2.1 BMG properties and machining ability of BMGs	10
2.2 Ball burnishing process	11
2.3 Abrasive jet polishing (AJP) process	13
3 Thesis objectives	14
4 Outline of thesis	15
Chapter 2 BACKGROUND INFORMATION	16
1 Milling process and milling parameters	16
1.1 Milling process	16
1.2 Milling parameters 	18
2 Ball burnishing process	19
2.1 The simplified theory of ball burnishing deformation	20
2.2 Effect of burnishing force on surface roughness 	22
2.3 Effect of feed on surface roughness 	23
2.4 Effect of ball material on surface roughness	23
2.5 Effect of burnishing speed on surface roughness	24
3 AJP process	24
3.1 AJP system	26
3.2 Model for the ductile and brittle mode material removal 	28
3.3 Parameters of the AJP process	30
3.4 Footprint on the workpiece after AJP process	33
4 Surface roughness measurement 	34
Chapter 3 TAGUCHI METHOD AND ANOVA ANALYSIS 	38
1 Introduction	38
2 Control factors and noise factors	39
3 Orthogonal array	39
4 ANOVA and S/N Analysis	40
Chapter 4 EXPERIMENTAL WORK	43
1 Introduction	43
2 BMG sample	44
3 Sample preparation	44
3.1 Milling process	44
3.2 Ball burnishing process	46
4 AJP process	50
4.1 System setup	50
4.2 Procedure to conduct the experiments	58
Chapter 5 EXPRIMENTAL RESULT AND DISCUSSION	66
1 Experimental result and analysis	66
2 Discussion	69
Chapter 6 CONCLUSION AND RECOMMENDATION	73
1 Conclusion	73
2 Recommendation for future work	73
Appendix A	77
Appendix B	79
Appendix C	80
Appendix D	81

                                

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