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題名 | 單晶鑽石刀具在高速正交精密切削上之應用--第1篇:切屑-刀具界面應力之分析 |
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作者 | 羅仕鵬; | 書刊名 | 四海學報 |
卷期 | 9 1994.12[民83.12] |
頁次 | 頁119-130 |
分類號 | 446.893 |
關鍵詞 | 高速切削; 應力分析; 單晶鑽石刀具; High speed cutting; Stress analysis; Single crystal diamond tools; |
語文 | 中文(Chinese) |
中文摘要 | 本研究旨在發展一高速正交精密切削模式;建立一套有限元素法模擬分析單晶鑽石刀具在高速正交精密切削OFC銅(oxygen free high conductivity)上之應用,文中並提出一變動的虛假摩擦係數的觀念去改良大變形有限元素法的公式,進而建立切屑一刀具界面應力之分析模式,以解析切屑與刀具接觸面間的剪應力、正交應力及變動摩擦係數之問題。在本研究中發現,雖然只是高速精密微量切削,但工件材料在高應變率及高溫下會在刀面上產生黏著(sticking)現象,此不僅影響刀具壽命,更對於精加工產品之表面精度產生莫大之影響。由本研究的分析結果可作為高速精密切削時的參考。 |
英文摘要 | The is paper presents a high speed orthogonal cutting model and also establishes a finite element method to analyze the mechanics of steady state in high speed orthogonal precision cutting process of the oxygen free high conductivity copper. The paper proposes a variant pseudo-frietion coefficient concept to modify the large deformation finite element formulation and develope a stress analysis model of chip-tool interface to solve the problems of the shear stress, normal stress and variant pseudo-friction coefficient on the chip-tool interface. In spite of the high speed mirco-cutting. the effect of hihg strain rate and high temperature will produce sticking phenomenon on the rake face of the tool. Not only will sticking phenomenon shorten tool life, but also have an effect on the machining accuracy in precision dimond cutting. Therefore, the result in this study can be considered as acceptable consideration during the procedure of high speed precision cutting. |
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