本文透過有限元素軟體Deform-3D進行方杯增量式板金成形模擬分析，探討沖頭及承板幾何參數對成品最薄厚度、厚度均勻性及最大成形力之影響，並找出最適合之加工條件，達到提升最薄厚度、厚度均勻性及降低成形力的目的。本文設計之增量式板金成形之沖頭及乘板幾何參數包括沖頭邊長、沖頭角隅圓角、沖頭圓角及承板圓角。實驗設計法採用適合建構二階反應曲面之Box-Behnken四因子三水準設計，共計25組模擬實驗點，利用統計軟體Minitab依Deform-3D有限元素軟體分析之結果進行迴歸分析，以建立成品最薄厚度、厚度均勻性及最大成形力之預測模型，進而探討各因子對品質特性之影響，並找出最佳化條件。以有限元素模擬結果對本文所建溝之預測模型進行檢驗，其結果顯示預測模型具有一定準確度。;An FEM model of incremental sheet metal formed square-cup is developed under the DEFORM-3D software. To observe the influence of punch and back plate geometric parameters to the thinnest thickness, thickness uniformity and maximum forming force of the finished. Also, intend to find the incremental forming condition for optimum design. The factors in the design include the punch geometric parameters, such as side length L, punch corner radius R_cp, punch radius R_p, and the factors of back plate geometric parameters include back plate corner R_b. The experiment adopts 25 groups of analogs with the Box-Behnken design. Using the Minitab software to do the regression analysis and develop the prediction equations. By doing so, it’s excepted using the FEM model and surface response methodology to find the optimum design of the thinnest thickness, thickness uniformity, and maximum forming force. Through the results of FEM simulations to verify the prediction equations with considerable accuracy.
