應用五軸加工機銑削球形曲面之探討

Multi-axis Milling of Spherical Surfaces by Five-axis Machining Center

梁宏彬(Hung-Pin Liang)

指導教授 ： 陳政順

國立臺北科技大學/機電學院/製造科技研究所/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00155

摘要

近年來，隨著製造技術的加工水準日漸升高，汽車業、半導體製造工業、電子工業、和各類模具製造業等，所設計產品日趨複雜化與多樣化。在精度、效率、複雜曲面的加工要求下，研究發展高效率、高加工精度與高表面加工品質之五軸加工技術，以因應日益競爭之市場需求是業界重要的關鍵技術與競爭優勢。故本研究探討與發展結合CAD/CAM與五軸加工機以加工球形曲面之關鍵技術，達到較佳的工件表面品質，以減少在拋光、磨光等後續處理的加工成本、時間及誤差。本研究的實驗方法與步驟包括利用商用CAD/CAM系統針對實驗對象規劃三軸/五軸同動加工路徑，並經後處理程式轉換，在本實驗室之平台傾斜/旋轉型之五軸加工機上進行實驗，實驗對象為NAK80模具鋼材料之凹與凸球形曲面之加工，此外考慮的切削條件有主軸轉速、進給速度、加工路徑等，在本研究所設定之最佳切削條件下，凹球形曲面之真圓度約為0.0283 mm，粗糙度為0.247 μm，而在相同切削條件下，凸球形曲面之真圓度為0.0551 mm，粗糙度為0.250 μm。本研究之方法與結果可供業界參考。

關鍵字

五軸加工 ； 球形曲面 ； CAD/CAM ； 模具加工

並列摘要

Recently, many product designers of various industries, such as automobile, semiconductor, electronic parts, and mold industries tend to design products featured with complex surface. Request for the efficiency, accuracy and machining of these complex surface, it is the important way to achieve competition advantage by developing high efficiency, accuracy, and quality five-axis machining techniques. This paper attempts to develop key technology used in die machining with spherical surface by application of the CAD/CAM software and 5-axis machining center. The goal of the study is to find the optimal machining parameters for better surface finish, and thus significantly reduce time, cost, and error in further bench working. In this study, a commercial CAD/CAM Software is used to plan and generate the multi-axis tool path, and a table rotating/tilting type five-axis machining center is used to perform the experimental machining operation. The material of the die studied is NAK 80 die tool steel, and the geometries are modeled as concave and convex spherical surfaces. Milling parameters considered are spindle speed, feed rate, and different types of cutting tool path. The experimental results show that the surface roughness for concave spherical surface is about 0.247 μm and roundness is about 0.0283 mm and the surface roughness for convex spherical surface is about 0.250 μm and spherical roundness is about 0.0551 mm under the cutting conditions mentioned in this study. It is believed that the results and methods presented in the thesis give a good reference for industry.

並列關鍵字

Five-axis machining ； Spherical surface ； CAD/CAM ； Die machining

參考文獻

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