傳統NC加工是以固定的進給率進行材料的移除，由於所移除的體積及刀具的受力並非固定，因此銑刀容易因劇烈的負載而撓曲，影響加工精度與品質。本研究分別對中加工與精加工提出不同的進給率調整的方法；中加工時藉由切削力與進給率的數學關係來調整進給率，使切削力量維持在適合的範圍內，刀具承受的負載不致於變化太大，而精加工時，以等體積移除率的觀念，藉由曲面的曲率來估計各個加工點體積，來進行進給率的調整。

Traditional machining of sculptured surfaces removes metal material with a fixed feed rate. Due to abrupt cutting forces during the machining processes, cutting tools tend to be damaged, influencing the precision and quality of machined parts. This research proposes the methodology to adjust feed rates for semi-roughing and finishing operations. For the process of semi-roughing, the relationship of cutting force and feed rate is studied to keep cutting force maintaining in an appropriate range; thus the pressure on cutting tools will not change so abruptly. In finishing operations, the maintenance of constant material removal rate is the core concept. The volume on each point to be machined is estimated based on the curvature of the point and the results are used to adjust the feed rates.

中文摘要……………………….……………………………………..Ⅰ
英文摘要………………………….…………………………………..Ⅱ
誌謝…………………………………….……………………………..Ⅲ
目錄……………………………………….…………………………..Ⅳ
圖表索引…………………………………..…………………………..V
第一章 緒論……………………………….…………………………..1
第二章 加工路徑規劃………………………..………………………....6
2.1 刀具路徑………………………….………………….……….....7
2.2 刀具路徑之步進長度……………………………………………8
2.3 以Z-map演算法求取加工路徑…………..……….……………11
第三章 加工進給率的調整…..……………..…..…………………...18
3.1 加工體積的計算.……………………………………………...18
3.2中加工進給率的調整……………………………………..……22
3.3精加工進給率的調整…….………………………………….....28
3.4 進給率的平滑化………………..…………………….……….34
第四章 系統功能之執行與實例………..……………………….…...37
4.1 實例一………………………………………………….……...40
實例二…………………………………………………………43
4.2結果與討論………………………………………………..……47
第五章 結果與未來研究方向…….……………………………….....49
附錄…………………………………….……………………………..50
參考文獻………………………………….…………………………..53
作者簡介…………………………………..………………………….55

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