超音波振動輔助沖切加工之有限元素分析

The finite element analysis of blanking process by superimposing ultrasonic vibrations

王子仁(Tzu-jen Wang)

指導教授 ： 葉維磬

國立中央大學/工學院/機械工程學系/碩士(2012年)

摘要

本論文的主要目的在於以模擬的方式探討超音波振動對於沖切產品斷面品質的影響，此包含發展適用於尋求沖切加工參數最佳化的數學模型。本論文另一目的則在於以吳[45]之實驗驗證模擬的方法並以有限元素法分析結果的妥適性。為了達成前述本論文的目的，以實驗設計法為碁石的反應曲面法將應用於規劃所有的實驗模擬方案。沖壓速度、模具間隙以及進料角度各以三個水準的方式被考慮在所有規劃的實驗方案中。本論文應用商業有限元素軟體DEFORM-2D，分析超音波振動輔助沖切加工問題，論文中將對具有超音波振動及不具有超音波振動作用的模擬結果進行比較及討論，以探討超音波振動對沖切品質的影響。如上所述的作法，將可期望以最少的實驗獲得充份的沖切產品品質的資訊，使本論文能以經濟的方式達成它的目的。此亦和工業生產的目的一致。

關鍵字

反應曲面法 ； 實驗設計 ； 下料過程 ； 超音波振動

並列摘要

The main objective of this proposal is to investigate simulative the effect of ultrasonic vibrations superimposed on the quality of blanked product, including the development of appropriate mathematical model which can be used to determine a set of optimum parameters for the blanking process. One of the objective of the proposal, however, is to simulative verify the validity of the result obtained using a finite element method in Wu. [45].
To achieve the objective above mentioned, the surface response methodology based on design of experiments will be employed to plan all simulation alternatives. The blanking speed, the clearance between die and punch, and the feeding angle, all having three distinct levels, will be chosen as working parameter considered in the experimental alternatives. A set of blanking die with an ultrasonic vibration device will be developed in order to carry out the experiments. Theexperimental result obtained with and without ultrasonic vibrations superimposed will be compared and discussed other to investigate the effect of the ultrasonic vibration on the edge quality of blanked products. By doing so, it is expected that sufficient information on the quality of blanked products can be obtained from a number of experiment carried out as less as possible, and thus the objective of this proposal can be achieved very economically. This is alsoconsistentwith thegoalgenerally required by industries.

並列關鍵字

design of experiments ； ultrasonic vibrations ； blanking process ； response surface methodology

參考文獻

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[4] T.C. Lee, L.C. Chan and P.F. Zheng, “Application of the finite-element deformation method in the fine blanking process”, Journal of Materials

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