高速切削SKD61模具鋼用之端銑刀最佳化設計

The optimal design of end-mill for high speed cutting SKD61 tool steel

吳昭鋒(Chao-Feng Wu)

指導教授 ： 李炳寅

共同指導教授 ： 許源泉(Yuan-Chuan Hsu)

國立虎尾科技大學/工程學院/創意工程與精密科技研究所/碩士(2009年)

摘要

近年來我國工業迅速發展，切削技術也隨著日新月異，對於加工各種機械零件之高精度化、品質及提高生產效率的要求下，切削技術紛紛往高速化、高進給化之趨勢發展。使用高速切削加工對於各種零件不僅可縮短製造時程、提升加工精度亦能降低生產成本，故因應配合高速切削加工之發展，刀具廠商積極發展使用不同的切削刀具材料在不同的切削條件和不同的切削材料下，以獲得最大效益。
　　本研究係以有限元素法建構高速切削模式，利用商業軟體DEFORM-2D模擬分析在不同的刀具幾何角度和切削條件下，對刀具最高溫度、刀尖與最高溫度之距離及切削力等因素的影響，使用田口和灰關聯方法針對模擬結果做最佳化分析與設計，完成最佳與最差之設計組合後，以這兩組設計組合進行對SKD61模具鋼之切削實驗比對。
　　實驗結果顯示，最佳設計組合之切削時間分別增長5.71及4.95分鐘、切削長度分別增長為2.02及1.53m，因此，以有限元素法建構高速切削模式是項有效益的技術，所以，本論文成功針對SKD61模具鋼用之端銑刀最佳化設計，找出最適合用於高速切削SKD61模具鋼之設計參數。

關鍵字

高速銑削 ； 有限元素法 ； 田口法 ； 灰關聯分析

並列摘要

In recent years, ours industries develop very rapidly, and cutting technology grows very well. Machining variety of mechanical parts needs high-precision, quality and promotion of production efficiency. Hence the cutting technology is with the trend of high-speed and high feed rate. By high-speed machining, reduction of manufacturing process time, enhancing machining accuracy and production cost-down can be achieved. Due to development of high-speed machining, cutting tool manufacturers use different cutting tool materials in different cutting conditions and materials to obtain maximum benefit.
　　In this study, finite element method is used to construct high-speed cutting mode basically, and then by commercial software DEFORM-2D to simulate the factors of maximum temperature of the cutting tool, the distance of the cutting tool tip and maximum temperature, and cutting force effected of cutting tool in different geometric angles and cutting conditions. By Taguchi method and Gray relational method the best results of simulation can be analyzed and designed. After the accomplishment of the best and the worst combination, using these two sets compare with the results of cutting tool steel SKD61 experiment.
　　Experimental results show that the best design combination of cutting time increased 5.71 and 4.95 minutes, the cutting length of the respective growth of 2.02 and 1.53m. Therefore, using finite element method to construct high-speed cutting mode is a cost-effective technology. This study is successful to design for tool steel SKD61, and identify the most suitable for high-speed machining tool steel SKD61 parameters

並列關鍵字

High-speed machining ； FEM ； Taguchi method ； Gray relational method

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