臺灣博碩士論文加值系統

　　由前人研究指出超音波振動輔助磨削難切削材料時有明顯的效果，如在加工硬脆材料時可以減少磨削力使砂輪磨耗降低，並有效提升自銳能力；在加工延性的材料時能提升排屑能力使砂輪填塞速度降低，延長修整週期與刀具壽命，但很少探討到超音波輔助磨削的砂輪選擇，可能會與傳統磨削不同，由前人的研究與經驗可以知道在傳統磨削中，磨削軟的材料會使用結合度硬的砂輪，而磨削硬的材料則反之，會根據材料特性做選擇，但如果砂輪搭配了超音波振動輔助，去除材料的機制不同，在選擇砂輪的組成就會跟傳統磨削有差異。所以本研究選用業界常用的樹脂鑽石砂輪，探討顆粒集中度與結合劑硬度的砂輪對超音波振動輔助磨削的加工表現與砂輪磨耗情形，並驗證超音波輔助的磨削擁有較好的磨削性及砂輪壽命。
　　實驗結果顯示傳統磨削碳化鎢時主要的磨耗方式為破裂及磨損磨耗，破裂常會發生在加工初期顆粒不穩定時，隨著加工時間久了磨損磨耗容易形成磨耗平面。超音波輔助磨削的主要磨耗方式為部分破裂及磨損磨耗，部分破裂發生的頻率高，所以較不容易產生磨耗平面，代表自銳能力較佳。
　　砂輪選擇方面不管是傳統磨削或是超音波磨削都須使用集中度高的砂輪，磨削性較好，而傳統磨削需搭配結合度較軟的砂輪，但超音波磨削需搭配結合度硬的砂輪。比較了兩種加工搭配適合的砂輪組成的磨削性，發現超音波輔助磨削的修整週期比傳統磨削了多38％，代表超音波磨削可以移除更多的材料而不需要做修整，提升加工效率。

　　The assistance of ultrasonic vibration on the difficult-to-cut materials has been proved very effective in grinding process. For example, when grinding brittle materials, the grinding force can be reduced to lower the wear, and the self-sharpening ablity of the grinding wheel can be effectively improved；When grinding ductile materials, chip adhesion can be reduced substantially, and the dressing cycle of the grinding wheel can be extended. However, many researches have not explored the selection of the grinding wheel for ultrasonic assisted grinding, which may be different from the traditional grinding. In conventional grinding process, grinding soft materials will use a hard-bonding grinding wheel, while grinding hard materials will use a soft-bonding grinding wheel. So which kind of grinding wheel selected is based on the material characteristics, but if grinding is equipped with ultrasonic vibration assistance,it will be different because of the difference of material removal mechanism. Therefore, my research will use resin grinding wheels which are the most common in industries. And I will investigate the grinding performance and wear of ultrasonic vibration assisted grinding with different abrasive concentration and bond hardness and verify that ultrasonic assisted grinding has better Grinding and grinding wheel life.
　　Experimental results show that the main wear mode of conventional grinding of tungsten carbide is macro fracture and attritious wear. The macro fracture often occurs when grains are unstable at the beginning of processing. And attritious wear usually becomes a wear plane after long processing times. Nevertheless, the main wear mode of ultrasonic assisted grinding is partial(micro) fracture and attritious wear. The frequency of partial fracture is high, so grains are less possible to become wear surfaces, which means better self-sharpening ability.
　　Regarding to the selection of grinding wheel, whether it is traditional grinding or ultrasonic assisted grinding, it is necessary to use a grinding wheel with high concentration. And according to the grade of the grinding wheel bond, traditional grinding needs to use the grinding wheel with softer combination, but the ultrasonic grinding needs to use the grinding wheel with harder combination. Comparing the grinding method with two respective suitable grinding wheels, it is found that the dressing cycle of ultrasonic assisted grinding is 38% times more than the traditional grinding, which means that ultrasonic grinding can remove more materials without dressing and increase grinding efficiency.

致謝 I
摘要 II
英文摘要 III
目錄 V
圖目錄 VII
表目錄 XI
CHAPTER1 緒論 1
1.1 研究背景與動機 1
1.2 文獻回顧 2
1.3 研究目的與方法 13
1.4 本文架構 13
CHAPTER2 相關理論 14
2.1 磨削基本原理 14
2.2 鑽石砂輪組成與特性 21
2.3 超音波振動輔助磨削機制 25
2.4 表面粗糙度 28
CHAPTER3 實驗設備與架構 32
3.1 實驗設備 32
3.2 實驗材料 43
3.3 實驗規劃 46
CHAPTER4 實驗結果與討論 53
4.1 砂輪磨耗磨削實驗 54
4.2 深切深磨削實驗 77
CHAPTER5 結論與未來展望 82
5.1 結論 82
5.2 未來展望 83
參考文獻 84

[1]辛志杰，超硬與難磨削材料加工技術實例，化學工業出版社，2013。
[2]I. Inasaki, "Grinding of Hard and Brittle Materials," CIRP Annals, vol. 36, no. 2, pp. 463-471, 1987.
[3]Z. W. Zhong, "Ductile or Partial Ductile Mode Machining of Brittle Materials," The International Journal of Advanced Manufacturing Technology, vol. 21, no. 8, pp. 579-585, 2003.
[4]J. B. J. W. Hegeman, J. T. M. De Hosson, and G. de With, "Grinding of WC–Co hardmetals," Wear, vol. 248, no. 1, pp. 187-196, 2001.
[5]F. Klocke, C. Wirtz, S. Mueller, and P. Mattfeld, "Analysis of the Material Behavior of Cemented Carbides (WC-Co) in Grinding by Single Grain Cutting Tests," Procedia CIRP, vol. 46, pp. 209-213, 2016.
[6]S. Y. Luo, Y. S. Liao, C. C. Chou, and J. P. Chen, "Analysis of the wear of a resin-bonded diamond wheel in the grinding of tungsten carbide," Journal of Materials Processing Technology, vol. 69, no. 1, pp. 289-296, 1997.
[7]L. Balamuth, "Ultrasonic assistance to conventional metal removal," Ultrasonics, vol. 4, no. 3, pp. 125-130, 1966.
[8]E. Uhlmann and G. Spur, "Surface Formation in Creep Feed Grinding of Advanced Ceramics with and without Ultrasonic Assistance," CIRP Annals, vol. 47, no. 1, pp. 249-252, 1998.
[9]J. Y. Shen, J. Q. Wang, B. Jiang, and X. P. Xu, "Study on wear of diamond wheel in ultrasonic vibration-assisted grinding ceramic," Wear, vol. 332-333, pp. 788-793, 2015.
[10]K. Ding, Y. Fu, H. Su, X. Gong, and K. Wu, "Wear of diamond grinding wheel in ultrasonic vibration-assisted grinding of silicon carbide," The International Journal of Advanced Manufacturing Technology, vol. 71, no. 9-12, pp. 1929-1938, 2014.
[11]黃郁珊，超聲振動輔助磨削硬脆材料之研究，國立清華大學碩士論文，2011。
[12]儲誠佳，平面磨床超音波主軸模組之設計與開發，國立台灣大學碩士論文，2017。
[13]M. G. Nik, M. R. Movahhedy, and J. Akbari, "Ultrasonic-Assisted Grinding of Ti6Al4V Alloy," Procedia CIRP, vol. 1, pp. 353-358, 2012.
[14]T. Tawakoli and B. Azarhoushang, "Influence of ultrasonic vibrations on dry grinding of soft steel," International Journal of Machine Tools and Manufacture, vol. 48, no. 14, pp. 1585-1591, 2008.
[15]C. Li, F. Zhang, B. Meng, L. Liu, and X. Rao, "Material removal mechanism and grinding force modelling of ultrasonic vibration assisted grinding for SiC ceramics," Ceramics International, vol. 43, no. 3, pp. 2981-2993, 2017.
[16]Z. Liang, X. Wang, Y. Wu, L. Xie, Z. Liu, and W. Zhao, "An investigation on wear mechanism of resin-bonded diamond wheel in Elliptical Ultrasonic Assisted Grinding (EUAG) of monocrystal sapphire," Journal of Materials Processing Technology, vol. 212, no. 4, pp. 868-876, 2012.
[17]曾超群，二維超聲振動輔助磨削碳化鎢合金之研究，國立清華大學碩士論文，2012。
[18]蕭凱駿，超音波振動輔助對磨削切屑黏附之影響，國立台灣大學碩士論文，2013。
[19]W. B. Rowe, Principles of Modern Grinding Technology. William Andrew, 2014.
[20]S. Malkin and N. Cook, "The wear of grinding wheels: part 1—attritious wear," Journal of Engineering for Industry, vol. 93, no. 4, pp. 1120-1128, 1971.
[21]任敬辛，康仁科，史興寬，難加工材料的磨削，國防工業出版社，1999。
[22]S. Malkin and C. Guo, Grinding Technology: Theory and Application of Machining with Abrasives. Industrial Press Inc, 2008.
[23]I. D. Marinescu, M. P. Hitchiner, E. Uhlmann, W. B. Rowe, and I. Inasaki, Handbook of Machining with Grinding Wheels. CRC Press, 2006.
[24]大森整，ELID鏡面研削技術，全華科技圖書股份有限公司，2006。
[25]賴耿陽譯，超音波工學理論實務，復漢出版社有限公司，2001。
[26]范光照，精密量測，高立圖書有限公司，2001。