頁籤選單縮合
題名 | Influence of Lubricant on Limit Drawing Ratio in Cup-Drawing Process: A Stabilization Matrices Scheme=以穩定性矩陣法探討潤滑劑對圓杯抽製成形極限之影響 |
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作者 | 黃佑民; 李經綸; | 書刊名 | 中國機械工程學刊 |
卷期 | 19:3 1998.06[民87.06] |
頁次 | 頁275-284 |
分類號 | 472.24 |
關鍵詞 | 穩定性矩陣法; 潤滑劑; 圓杯抽製成形極限; Limit drawing ratio; Lubricant; Stabilization matrices scheme; |
語文 | 英文(English) |
英文摘要 | 將穩定性矩陣偶合入四節點四邊形元素中,藉以估算使用不同潤滑劑之圓杯抽製 成形極限。實驗中採用兩種典型的商用潤滑劑,即硬脂酸鋅粉及壓板油。並於液壓鈑金成形 機中完成抽製實驗。所有的模擬中,沖頭負荷對行程的理論曲線、沿著杯中心線的厚度分佈 及變形歷程皆顯示與實驗結果一致。 應用廣義的τ min 策略以決定每一步驟的沖頭行程, 被證明適用於追蹤整個抽製過程中節點與工具界面間的滲入及分離現象。於實驗中使用硬脂 酸鋅潤滑劑將可比壓板油潤滑劑得到較小的沖頭負荷及較高的抽製成形極限。因此,本文顯 示硬脂酸鋅潤滑劑的效果較壓板油潤滑劑要好。 ong a cup generatrix, and deformation history showed good agreement with the experimental results. The generalized τ min strategy, employed to determine punch travel in each step, was proven adequate to trace the penetration and separation phenomena between the node and tool boundary in the entire cup-drawing process. The use of the zinc stearate lubricant resulted in smaller punch load and higher limit drawing ratio than the press oil lubricant did. Hence, the effect of the zinc stearate lubricant was better than the press oil lubricant in this study. |
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