創新式內建荷重計之微型球擠光工具之研製｜國立臺灣科技大學博碩士論文系統

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研究生：	澎國元 Nguyen-Quoc Banh
論文名稱：	創新式內建荷重計之微型球擠光工具之研製 Development of an Innovative Micro Ball-Burnishing Tool Embedded with a Load Cell
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：	2012
畢業學年度：	100
語文別：	英文
論文頁數：	56
中文關鍵詞：	Micro ball-burnishing 、Taguchi orthogonal array 、ANOVA 、full factorial experiment
外文關鍵詞：	Micro ball-burnishing, Taguchi orthogonal array, ANOVA, full factorial experiment
相關次數：	點閱：223 下載：1
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A new load cell embedded micro ball-burnishing tool, clamping a ball with the diameter of 0.5mm, has been designed and manufactured. By utilizing the Taguchi's orthogonal array, analysis of variance (ANOVA), and F-ratio analysis and full factorial experiment the optimal condition for ball-burnishing process of specific material can be determined. The Oxygen Copper Free (OFC) specimens were used as the tested sample for the tool. The four control factors of ball-burnishing process studied in this research were: ball material, burnishing force, step over, and burnishing speed. Among them, burnishing force and step over have significant effects on the surface roughness of the specimen. The optimal ball-burnishing condition is the combination of Silicon Nitride material ball, burnishing force of 2N, step over of 6μm, and the burnishing speed of 400mm/min. The burnished surface of OFC material can be improved around 77.5% from Ra 1.2μm to Ra 0.2μm. The optimal burnishing condition for plane surface then applied on the cylindrical convex – plano lens model. The surface roughness of Ra 0.32μm from the ground surface of Ra 1.43μm was obtainable.
Keyword: Micro ball-burnishing process, Taguchi's method, ANOVA, full factorial experiment

List of figures...............................................................iv
List of tables.................................................................v
Chapter 1 INTRODUCTION.........................................................1
1	Research motivation....................................................1
2	Literature review......................................................1
3	Thesis objectives......................................................4
Chapter 2 BASIC PRINCIPLE......................................................5
1	Milling process and milling parameters.................................5
1.1	Milling process........................................................5
1.2	Milling parameters.....................................................6
2	Ball-burnishing process................................................8
2.1 The simple theory of ball burnishing deformation.........................8
2.2	Relationship between surface roughness and ball burnishing parameters.10
3	Taguchi method........................................................13
3.1	Introduction..........................................................13
3.2	Control factors and noise factors.....................................14
3.3	Orthogonal array......................................................15
3.4	ANOVA and S/N Analysis................................................16
3.5	Confirmation experiment...............................................17
Chapter 3 DEVELOPMENT OF A MICRO BALL-BURNISHING SYSTEM.......................19
1	Design of a new micro ball burnishing tool............................19
2	Limitation of the design of micro ball-burnishing tool................22
3	Force measurement system..............................................22
3.1	Schematic of measurement system.......................................22
3.2	Force measurement system components...................................23
3.3	Calibration of force measurement system...............................27
Chapter 4 EXPERIMENTAL WORK...................................................33
1	Introduction..........................................................33
2	Experimental workpiece................................................34
3	Milling process.......................................................34
4	Micro ball burnishing process.........................................35
4.1	Configuration of Taguchi’s orthogonal array..........................35
4.2	Setup of the ball burnishing process..................................39
Chapter 5 EXPERIMENTAL RESULTS................................................41
1	Experimental results of the L18 Taguchi’s orthogonal array...........41
2	Full factorial experiment.............................................44
3	Discussions...........................................................45
3.1	Surface roughness improvement.........................................45
3.2	Single path width under the optimal ball-burnishing parameters........46
3.3	Effect of burnishing force on surface roughness.......................47
3.4	Effect of number of pass..............................................48
3.5	Effect of step – over on the surface roughness.......................48
4	Application...........................................................49
4.1	Application model.....................................................49
4.2	Fabrication of the lens model.........................................50
4.3	Results and discussions...............................................51
Chapter 6 CONCLUSIONS.........................................................53
1	Conclusions...........................................................53
2	Future works..........................................................53

                                

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