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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/2676


    Title: 板金雷射成形之有限元素分析;Thermal-mechanical analysis on the laser forming process of sheet metals
    Authors: 林峻葳;Jiunn-Uei Lin
    Contributors: 機械工程研究所
    Keywords: 成形角度;雷射成形;bending angle;laser-forming
    Date: 2006-06-30
    Issue Date: 2009-09-21 11:53:23 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 摘要 本文應用MARC有限元素軟體分析雷射加工板材成形問題。為了解MARC應用於雷射成形問題的可靠性及妥適性,本文首先利用雷射加工板材成形的實驗驗證有限元素解的準確性,並分別探討加工製程中雷射功率、雷射光徑、板材厚度及掃描速度,在雷射加工成形為溫度梯度機制(Temperature gradient mechanism)下對成形角度的影響,進而提出成形角度之經驗公式與預測方法。 Abstract The laser-forming process is a new flexible forming process without rigid tools and external force. The laser beam is assumed to be Gaussian mode and the coupled thermo-elastoplastic problem is treated as three-dimensional. The deformation pattern of specimens have been calculated numerically and the transient response of the bending angle has been validated by experiments. The relationship between the bending angle and laser-forming parameters, such as laser power, spot size, thickness, and scan speed are studied in detail by FEM simulation. The research proposed formulate to calculate the bending angle successively.
    Appears in Collections:[機械工程研究所] 博碩士論文

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