The Study of Structural Performance Analysis and Improvement of High-speed Machine Tools
詹子奇、吳政憲
E-mail: [email protected]
ABSTRACT
Product accuracy improvement plays an important role in advancing the mechanical industry into a high value-added field.
Emphasis should be placed on the efficiency, reliability and machining accuracy. The structure of a Vertical Machine Center must not only support the heavy weight but also withstand the cutting action. Therefore, a precision machine has to be carefully designed to avoid the undesirable deflection or vibration. The study is conducted through a static and dynamic structural analysis and undergoes the experiment on the basis of the Finite Element Analysis to construct the interface parameters. The results will be used to modify and assure its validity of the Finite Element Model. With the valid model, improvements on the structure of the machine unit can be performed to increase the stiffness and hence the natural frequencies, while not significantly increasing the weight of the machine unit. This error prediction model can be used to comprehend the structural error compensation later and improve the machining accuracy of a machine tool. This research also adopts the Super -Element Method to analyze the structural characteristics of the whole machine.
Keywords : Machine Tool ; Finite Element Analysis ; Modal Testing ; Modal Analysis Table of Contents
第一章 緒論 1.1 簡介 1.2 文獻回顧 1.3 研究目的及內容 第二章 實驗規劃與測試 2.1 結構靜剛性 2.2 模態測試 2.3 結構動剛性 第三章 分析流程介紹 3.1 材料試驗 3.2 元素的選用 3.3 分析原理與過程 3.4 各組件和整機實體模型與有限元素模型 第四章 測試與分析結果比較 4.1 實際與分析重量比較 4.2 模態測試與有限元素分析比較 第五章 結構設計改善 5.1 整機與單件分析 5.2 考慮主軸頭配重 5.3 整機結構與機座支撐跨距 5.4 考慮加強肋之結構 5.5 改變鞍座承板厚度 第六章 結論 6.1結論 6.2建議 與未來研究方向 參考文獻
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