臺灣博碩士論文加值系統

本研究探討半圓形5052鋁合金製品之下料製程，下料模具採用較小的公母模間隙和較大的壓料力量，透過塗布潤滑油於下料模具之特定部位的方式來提高工件的斷面品質，增加圓弧側剪切面比例並減少破裂面比例。在有限元素模擬軟體中，以實驗之最大成形力為目標，找出合適的摩擦係數設定值。另外並分析成形之半圓形5052鋁合金製品所需要的最大成形力找出下料模具最佳潤滑部位，並由實驗結果加以驗証。實驗以四種不同的V型環幾何特徵和四種不同黏度之潤滑油組合進行比較，利用金相實驗觀察材料內部流動情形，判斷出塗布不同黏度的潤滑油對工件圓弧側剪切面比例的影響。利用沖床的負荷元擷取出沖壓下料製程的時間與負載圖，找出不同參數下發生裂紋的時間判斷圓弧側剪切面的比例；利用表面粗糙儀測量出工件直徑側之中心線平均粗糙度（Ra）。從這些結果可以發現，若將潤滑油塗布於下料模具的特定部位，就能有效地提高工件圓弧側剪切面的比例和降低直徑側的粗糙度，同時達到節省能源和延長模具壽命的功效。

In this study, to explore the process of semi-circular 5052 aluminum alloy products, the blanking mold under this study uses a smaller clearances and a larger blankholder force, and the workpiece is improved by using the lubricating oil in the specific parts of the cutting mold of the cross-section quality, increase the proportion of the smooth shear zone of the arc surface and decrease the proportion of the fracture zone. In the finite element simulation software, try to aim for the maximum modulus of the experiment and find the appropriate coefficient of friction set value. In addition, and analysis of the formation of semi-circular 5052 aluminum alloy products required for the maximum forming force to find the best cutting parts of the cutting mold, and verified by the experimental results. Experiments to compare four different geometric characteristics of V-ring and four kinds of different viscosities lubricate composition, The internal flow of the material was observed by metallographic experiment and the influence of lubricate with different viscosity on the ratio of the smooth shear zone of the arc side of the workpiece was judged. Using the load cell of the press to extract the time and load diagram of the blanking process to find out the time of the occurrence of cracks under different parameters to determine the proportion of the smooth shear zone of the arc side. The center line average roughness of the workpiece straight side was measured by the surface roughness machine. According to the results, it can be found that if the lubricate is applied to a specific portion of the blanking mold, it is possible to effectively increase the proportion of the bright side surface of the workpiece and to decrease the roughness on the straight side to achieve save energy and the effect of protecting the mold life.

摘要 I
Abstract II
目次 III
圖目次 V
表目次 VII
第一章 緒論 1
1.1前言 1
1.2研究目的 1
1.3論文架構 2
第二章 文獻回顧 5
2.1精密沖壓之原理與應用 5
2.2潤滑油 6
2.3有限元素分析法 7
2.4文獻回顧總結 7
第三章 模具設計與模擬分析 8
3.1模座設計 8
3.2沖頭與模具間隙 8
3.3 V型環 11
3.4壓料板與壓料彈簧 16
3.5有限元素分析之模型建立 17
第四章 實驗方法 19
4.1實驗設備 19
4.1.1伺服沖床 19
4.1.2光學顯微鏡 20
4.1.3黏度機 21
4.1.4表面粗度儀 22
4.2實驗規劃 22
4.2.1加工材料 22
4.2.2潤滑油品選用 24
4.2.3實驗參數 25
4.2.4實驗參數組合 26
4.3數據統計方法 27
4.3.1介紹變異數與標準差 27
4.3.2變異數分析（ANOVA） 27
第五章 結果與討論 30
5.1下料力分析 30
5.2下料模具的最佳潤滑位置 32
5.3沖壓成品圓弧側剪切面高度 35
5.4沖壓成品直徑側斷面粗糙度 47
5.5金相觀察 52
5.5.1腐蝕配方 52
5.5.2內部料流動角度比較 54
第六章 結論與未來展望 57
6.1結論 57
6.2未來展望 57
參考文獻 58

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