臺灣博碩士論文加值系統

本研究主要是利用膠體磁力研磨(Gel Magnetic Abrasive Finishing)法對模具鋼進行平面研磨加工。實驗中以自行研製的磁力研磨刀具，架設於CNC加工中心機上，磁極之端面吸附液態膠體和磨料及鐵粉混合而成之膠體磁性磨料，磁性磨料受到磁場的作用，在磁極之間形成可撓性磁刷(Flexible Magnetic Brush)，對工件的表面研磨來探討表面粗糙度的改善程度。
實驗是以模具鋼SKD11作為加工材料，藉由單一參數實驗法進行實驗，以探討轉速、磨料粒徑、鐵粉粒徑、磨料濃度、鐵粉濃度等加工參數，對表面粗糙度的改善等研磨特性的影響。觀察單一參數的實驗結果，使用田口實驗法找出最佳化的加工參數，實驗結果可得知在加工三十分鐘後表面粗糙度改善率可達到92%。最好的表面粗糙度為0.083μm。

This research mainly had employed the gel magnetic abrasive finishing for grinding the surface of the mold steel. A magnetic abrasive cutting tool installed in the CNC machine was used to attract the magnetic abrasive gel. A flexible magnetic brush was produced when the magnetic field was applied in the gel. The surface roughness of the working pieces would be improved by this finishing method.
In the experiment, the factors of the rotating speed, the abrasive size, the iron particle size, the abrasive concentration, and the grinding amount were used to improve the machining rate of the gel magnetic abrasive finishing. Based on the above research, the Taguchi method was adopted to find optimum parameters from the experiment. The roughness improved rate would reach to 92% after a 30 minute machining and the surface roughness of the working pieces would reduce to 0.083μm.

中文摘要 i
英文摘要 ii
誌　　謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒 論 1
1.1前言 1
1.2文獻回顧 2
1.2.1 磁力拋光機構方面 2
1.2.3 磁性磨料方面 3
1.2.4 表面精度方面 5
1.2.5 不同型態之加工方式 5
1.3 研究動機與目的 11
1.4 論文架構 12
第二章 研究原理與方法 13
2.1 磁力研磨加工原理 13
2.2 磁性磨粒之切削加工機制 14
2.3 磁力研磨之磁力分佈 15
2.4 磁力研磨刀具製作 18
2.5 膠體磁性磨料的製作 19
2.6 中心線平均粗糙度 20
2.7 單一參數實驗法 20
2.8 田口式實驗法 21
2.8.1 田口式品質工程概念 21
2.8.2 品質特性 25
2.8.3 影響製程或品質績效的因子 26
2.8.4 穩健設計 28
2.8.5 參數設計的步驟 29
2.8.6 傳統實驗法與田口式實驗法之比較 30
第三章 實驗設備與方法 33
3.1 實驗規劃 33
3.2 實驗設備 34
3.2.1 立式綜合加工機 34
3.2.2 表面粗糙度量測儀 35
3.2.3 桌上型超音波清洗機 36
3.2.4 彈性流體攪拌器 36
3.1.5 掃描式電子顯微鏡(SEM) 37
3.3 實驗材料準備 38
3.3.1 實驗工件的準備 38
3.3.2 膠體磁性磨料的準備 39
3.3.2 膠體磁性磨料的濃度比 40
3.4 實驗步驟 41
第四章 結果與討論 42
4.1 單一參數實驗結果 42
4.1.1 表面粗糙度與時間的關係 42
4.1.2 表面粗糙度與磨料粒徑的關係 44
4.1.3 表面粗糙度與轉速的關係 45
4.1.4 表面粗糙度與磨料比例的關係 46
4.1.5 表面粗糙度與鐵粉比例的關係 47
4.2 田口式實驗法的實驗結果 48
4.2.1 田口式實驗法的實驗規劃 48
4.2.2 田口式實驗之模具鋼表面粗糙度的實驗結果 52
第五章 結論與未來展望 56
5.1 結論 56
5.2 未來展望 57
參考文獻 58
簡 歷 66

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65.T. Shinmura, T. Aizawa, “Study on Internal Finishing of a Non-Ferromagnetic Tubing by Magnetic Abrasive Machining Process”, J. of JSPE, Vol. 54, No. 4, pp. 767-773, 1988. (in Japanese).
66.T. Shinmura, T. Aizawa, “Study on Internal Finishing of a Non-Ferromagnetic Tubing by Magnetic Abrasive Machining Process”, Bull. Japan Soc. of Prec. Engg., Vol. 23, No. 1, pp. 37-41, Mar. 1989.
67.T. Shinmura, T. Aizawa, “Study on Magnetic Abrasive Finishing Process – Development of Plane Finishing Apparatus Using a Stationary Type Electromagnet”, Bull. Japan Soc. of Prec. Engg., Vol.23, No. 3, pp. 236-239, Sep. 1989.
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