摘要
由於TiN與TiCN膜層具有高硬度、低摩擦係數、耐腐蝕性等特質，所以廣泛被運用在刀具上。本論文主要是探討不同鍍膜層TiN、TiCN與未鍍膜刀具在不同的切削條件下，對銑削304不銹鋼時刀具磨耗分析、工件表面粗糙度探討。同時利用田口實驗方法（Taguchi Method）來規劃銑削實驗，瞭解不同鍍膜刀具與銑削加工條件等加工變異參數的交互作用為何。之後再以不同的切削速度、每刃進給，分別作銑削實驗來探討刀具磨耗及切屑型態。

而在本次田口法實驗當中三種可控銑削因子，對刀腹磨耗寬度及工件表面粗糙度影響，都是以不同鍍膜刀具銑削因子影響程度最大。同時實驗數據顯示，未鍍膜刀具磨耗量最大，TiCN鍍膜刀具磨耗量最小，且未鍍膜刀具磨耗量隨著時間的增長而增加，成正比關係。對於切削速度與進給量變更時，則明顯發現刀具磨耗量隨著切削速度與進給量增快而增大。其次切削速度對於切削後之切屑硬度及厚度是速度愈快兩者值愈高，並且切屑硬度及厚度與刀具磨耗量成正比關係。

Abstract
It’s widely used on tools due to TiN and TiCN coating featuring high hardness; low friction coefficient; anti-corrosiveness. The article is first mainly probing into tools with and without TiN, TiCN and without coating under different cutting condition while milling 304 stainless steel, its flank wear analysis and roughness of surface of workpiece. Second using Taguchi Method to design experiment in order to know the mutual function of variance parameter with different coating tool and mill machining condition. Finally, to experiment mill with different cutting speed and feed per flute in order to probe into wear of tool and chip type.

The three manageable mill factors in the Taguchi Method experiment, the influence of roughness of surface and flank wear of width with different coating tool mill factors with the most significant influence. At the meantime, according to the experiment data showing that uncoated tool would be with the largest attrition value, and tool coating with TiCN have the smaller attrition value. Therefore, wear of uncoated tool is proportional to the using time. When cutting speed and feed quantity changes, it shows obviously that wear tool would growing larger with the hingher speed of cutting and feeding. When cutting speed is faster, the value of hardness and thickness of the chip after cutting would be higher; and the hardness and thickness of the chip would be proportional to wear of the tool.

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