隨著科技的日新月異，人類追求更高品質的生活，而在傳統機械的工具機領域亦是如此，追求更好的加工品質、要求完美的加工精度。然而台灣工具機產業現有四大困難:材料技術、量測技術、組配技術、以及高階段控制系統等，其中改善現有組配技術為本研究的主要目的。
本論文首先介紹磁流變液之特性，並施以外加磁場來控制磁流變液之抗剪應力，再把其應用在工具機的主軸夾持上，透過磁流變液不同的操作型態，產生夾持力以及降低外在振動對加工精度造成的影響。並利用電磁鐵模擬軟體Ansoft/Maxwell進行磁路的模擬，確保磁場能順利使磁流變液磁化，產生足夠的抗剪應力。最後在架設實驗平台量測雛形之承載力以及利用NI訊號擷取系統量測磁流變液的減振效果。
透過拉力測試及振動量測，發現本研究所設計之磁流變液夾持裝置之小模型可承重81.1公斤重，純剪應力可承重63.9公斤重；振動量測方面，可以發現本研究之磁流變液透過其磁流體自身的黏滯性，可有效阻隔外在的高頻振動。且在外加磁場情況下，其高頻減振性質不減，因此能使工具機主軸在加工時不受外在振動影響。

As technology advances, people continue to pursuit higher quality of life. It is also the same in the conventional mechanical tooling field such as better quality and higher precision. However, in Taiwan, the lack of development in the technology of material, measurement, assembly, and advanced control system are seriously affecting Taiwan’s potential in machine tool.
The aim of this thesis is to improve the existing assembly technology. This thesis proposes a method using an external magnetic field to control the magneto-rheological fluid shear-stress to apply on the spindle collet of machine tool. Different magneto-rheological fluid application modes are used to produce a clamping force to reduce external vibration in high precision assembling. The proposed method is to first simulate the magnetic path using Ansoft Maxwell software to experiment if the magnetic field can magnetize the magneto-rheological fluid and produce enough shear-stress. Then validate the result by building a small model for measuring its loading as well as using a NI data acquisition system to measure the damping of the magneto-rheological fluid.
Through the tensile test and vibration measurement, the result shows that the prototype of MRF fixture device could withstand up to 81.1 kg in vertical load and 63.9 in pure shear load; the magnetic fluid could significantly suppress high-frequency vibration due to its viscosity whether the external magnetic field is applied or not. Therefore, this device is able to help spindle withstand external vibration during operation.

摘要 II
致謝 VI
目錄 VII
圖目錄 X
表目錄 XIV
第一章　緒論 1
1.1前言 1
1.2研究動機 3
1.3文獻回顧 4
1.4研究方法 7
第二章　磁流變液特性與工程應用 9
2.1智能材料(Smart Material) 9
2.2磁流變液的組成與性質 10
2.3賓漢模型(Bingham Model) 11
2.4未受磁場作用下磁流變液的黏滯性 13
2.5磁流變液的操作型態 14
2.5.1 開閥模式(Valve mode) 14
2.5.2 剪力模式(Shear mode) 14
2.5.3 擠壓模式(Squeeze mode) 15
第三章　磁路理論 16
3.1電磁學基礎理論 16
3.1.1磁場 17
3.1.2 B場與H場 18
3.1.3 磁通量與高斯定理 21
3.1.4 磁路分析 21
3.2磁流變液的磁路分析 24
第四章　夾持裝置與磁路設計 26
4.1結構設計 27
4.1.1磁流變液之剪應力推導 27
4.1.2設計概念 28
4.2磁場模擬與量測 31
4.2.1磁場模擬 31
4.2.2量測設備與架設 38
4.2.3量測結果 39
第五章　拉力測試與振動量測 47
5.1拉力測試 47
5.1.1實驗設備 47
5.1.2拉力測試結果 48
5.2振動量測 50
5.2.1實驗設備與架設 51
5.2.2振動量測結果 52
第六章　結論與未來展望 61
6.1結論 61
6.2未來展望 63
參考文獻 65

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