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A Study on the Geometry Model for Cutter Selection Evaluation in Numerically Controlled Milling Machines

數控加工中刀具選擇評估模式之研究

摘要


本研究以微分幾何為基礎,將被加工曲面分成三類區域:橢圓域、雙曲域及拋物域,並且針對各曲面域之特性,探討刀具選擇的準則,建立了評估加工精度與加工效率的定量計算模型,並藉著殘留高度差值及切削行距計算數據,為銑刀的選擇提供一種定量分析方法。本文根據端面銑刀與帶角圓的中凹銑刀在NC加工中的狀態,分析了各自的優勢,建立了效率評價的相關幾何模型,並應用電腦模擬做了定性與定量的分析。我們以加工效率、加工精度等為綜合指標,在不同的被加工曲面特性中探討其優劣,同時依被加工曲面特性,提供正確選擇這兩種銑刀的依據。

並列摘要


In this study, geometry model for efficiency evaluation and demonstrate qualitative and quantitative analysis are established by utilizing differential geometry. Based on the machining conditions of the uses of flat end cutter (FC) and disc cutter with a concave end (DCC) in the numerically controlled (NC) machining process, this study aimed to establish a related geometry model for efficiency evaluation and demonstrate qualitative and quantitative analysis by utilizing computer modeling. The analyzed parameters such as efficiency, accuracy and economical utility for different machined surfaces will be reported to provide reliable selection criteria of FC and DCC in order to improve NC machining.

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