摘要

本研究旨在利用實驗的方法探討液動壓拋光法應用於工件表面粗度移除時，粗度移除效率的問題。本研究將利用實驗的方法觀察不同加工深度下，工件表面粗度變化的情形，並掌握加工過程中影響工件表面粗度移除效率與粗度移除極限值的因素，並建立一套合理數學模型加以解釋粗度移除過程中的因果關係。

經由實驗所得的結果可知，工件表面粗度在加工過程中，粗度的變化有一定的趨勢，會隨加工深度而迅速下降，最後到達飽和。在液動壓拋光法半接觸潤滑的加工條件下，工件表面粗度的振幅與波長均會影響拋光過程中粗度移除的效率，並且由實驗可以發現，刀具轉速對粗度移除的過程與結果影響不大。

由實驗分析與數學模式的建立本研究發現，粗度移除效率與刀具表面粗度、工件表面粗度振幅與波長、工件表面波峰與波谷的表面能有關。工件表面粗度的振幅越大，粗度移除效率越高；工件表面的粗度波長越小，粗度移除效率越大，在加工過程中工件表面粗度無法完全被移除，有其加工的極限，而不同波長的粗度其可移除的極限值各有不同，波長越小的表面粗度，其經由加工最後可達的極限值越小，反之則越大；刀具表面粗度越小，粗度移除效率越高。

在未來的應用方面，希望能藉由掌握影響粗度移除效率與粗度移除極限值的因素，提昇工件表面粗度移除效率與粗度移除極限值的大小。

Abstract

The removing efficiency of surface roughness for the hydrodynamic polishing process under semi-contact lubricating condition was investigated in this thesis. The experimental relationships between surface roughness and polishing were first examined. From the relationships, the potential influential factors of the removing efficiency and the magnitude of surface roughness were identified. Finally, a mathematical model that was related to the removing efficiency and the magnitude of surface roughness was proposed.
Based on the experimental study, it was shown that the surface roughness would be rapidly reduced at the beginning by polishing process and then hardly improved afterward. This trend implied that surface roughness would not be completely removed during the polishing process. It was proposed that the amplitude and wavelength of surface roughness would affect the removing efficiency of surface roughness. Further, the removing efficiency was not sensitive to the tool velocity.
From the mathematical model, several points were concluded. First, the removing efficiency was positively proportional to the amplitude of surface roughness. Second, the removing efficiency was inversely to the amplitude of surface roughness. Third, the removing efficiency was inverse proportional to a waviness of tool surface. Fourth, the removing efficiency was not sensitive to tool velocity. Finally, there existed an achievable minimum surface roughness for a surface with specific wavelength. The magnitude of a minimum surface roughness was shown to be proportional to the wavelength of work surface.

目錄

第一章 緒論……………………………………1
1.1前言 …………………………………………1
1.2研究動機 ……………………………………1
1.3參考文獻………………………………………2
1.4液動壓拋光法簡介……………………………3
1.5研究目的與內容介紹…………………………5

第二章 實驗規劃與結果………………………7
2.1實驗規劃 ……………………………………7
2.2實驗設備……………………………………10
2.2.1實驗系統簡介……………………………10
2.2.2實驗設備及量測儀器……………………12
2.3實驗結果……………………………………13
2.4結論…………………………………………15

第三章 實驗規劃分析…………………………7
3.1工件表面粗度改善指標……………………17
3.2實驗結果趨勢的模擬………………………18
3.3粗度移除的飽和深度………………………20
3.4工件表面粗度移除效率……………………21
3.5工件表面粗度移除的極限值………………24
3.6結論…………………………………………25

第四章 理論分析……………………………27
4.1非接觸潤滑區之加工率……………………27
4.2粗度移除效率指標…………………………29
4.3影響粗度移除效率指標的因素……………32
4.4結論…………………………………………35

第五章 結論…………………………………37
參考文獻…………………………………………39

參考文獻

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