車用鋁板沖壓成型的實驗與分析

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姓名

黃竣揚(Jin-Yang Huang) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

車用鋁板沖壓成型的實驗與分析

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摘要(中)

鈑件成形是機械重要成形方法之一，製作鈑件成品必頇考慮鈑件成形性
及彈回對成形件尺寸的影響。本研究目的在於建立鈑件成形及彈回變化的資料庫，根據實驗值建立鋁合金之成形極限圖及成形後最大彈回量，並冺用軟體模擬分析剷雪機煞車press brake 零件沖壓成形應力/應變變化及破裂分析同時預測成形最大彈回量。本文使用AA5754-O、AA5182-O、AA6022-T4三種材料進行研究，這些材料被廣泛應用在汽車工業，成形實驗使用Nakazima 實驗，本彈回實驗使用不同模具Three point bending、Unconstrain bending，並以試片的壓延方向(0°,90°)作為條件參數，V-bending 以有無貼模、模具開口及模具拋光與否作為條件參數進行比較，產生的結果差異分析對成形性之影響，以Simufact16.0 軟體模擬及實驗結果的趨勢作相互比較分析，得到上述三種鋁合金的彈回性質。

摘要(英)

Sheet metal forming is one of the most important methods of forming in machinery. Forming sheet product consider the influence of sheet formability and springback on the size of shaped parts .The purpose of this study is to establish a database of sheet metal forming and springback changes, establish a forming limit
diagram of aluminum alloy and the maximum springback after forming based on experimental values, and use software simulation analysis snow blower press
brake stress / strain changes The fracture analysis also predicts the maximum springback of the forming. AA5754-O, AA5182-O and AA6022-T4, are used for research. These materials are widely used in the automotive industry, the forming experiment are used (0, 90 °) as a condition parameter. Different frictional forces of the molds are compared as conditional parameters. The analysis result analyzed with the simulation of the Simufact 16.0 software of the differences in the impact on the formability is compared with the experimental results, obtaining properties of springback of three materials.

關鍵字(中)

★ 鋁板
★ 彈回
★ 三點板彎
★ U型板彎
★ V型板彎
★ 成形極限圖
★ 煞車件破裂分析

關鍵字(英)

★ aluminum sheet
★ springback
★ Three point bending
★ Unconstrain bending
★ V bending
★ Forming limit diagram
★ press brake fracture analyze

論文目次

摘要 I
Abstract II
目錄 III
圖目錄 VI
表目錄 VIII
第一章板金成形鋁合金的一般介紹 1
1-1 鋁合金AA5754-O , AA5182-O , AA6022-T4材料簡介 1
1-1-1 鋁合金AA5754-O 1
1-1-2 鋁合金AA5182-O 1
1-1-3 鋁合金AA6022-T4 2
1-2 鋁合金拉伸測試與性質(Tensile properties) 2
1-3 成形極限圖Forming limit diagram(FLD) 3
1-3-1 Marciniak test 3
1-3-2 Nakazima test 3
1-3-3 摩擦力對成形極限之影響 4
1-3-4 成形極限曲線及marginal區 5
1-4 鈑金成形之彈回(springback) 6
1-4-1 彈回簡介 6
1-4-2 彈回補償(Springback compensation) 6
1-4-3 Three point bending 7
1-4-4 鈑件成形Unconstrain bend 7
1-4-5 鈑件成形U-bending 8
1-4-6 鈑件成形V bending 9
1-5 鈑金彈回成形之模擬準則 12
1-5-1 Hill’48屈服準則 12
1-5-2 Lankford coefficient and Normal anisotropy 12
第二章鈑金成形鋁合金文獻回顧 14
2-1 金相分析 14
2-2 成形極限圖 15
2-3 板材的Three point bending 17
2-4 板材的Unconstrain bending 18
2-5 板材的V bending 18
第三章實驗步驟 20
3-1 實驗材料 20
3-1-1 鋁合金板材AA5754-O 20
3-1-2 鋁合金板材AA5182-O 20
3-1-3 鋁合金板材AA6022-T4 20
3-2 實驗設備 20
3-3 材料清淨性分析 22
3-4 鋁合金薄板之成形極限實驗（六和股份有限公司-高科大執行實驗） 22
3-4-1 網格蝕刻 23
3-4-2 成形極限實驗機台設定 24
3-4-3 成形極限實驗(沖壓成形) 24
3-4-4 感光耦合元件(Charge-coupled Device)攝相機量測 25
3-5 鋁合金鈑件Three point bending彈回實驗 27
3-6 鋁合金鈑件Unconstrain bending 彈回實驗 28
3-7 鋁合金鈑件V-bending 彈回實驗 30
3-7-1 表面粗糙度量測 30
3-7-2 鋁合金鈑件V bending的模具氮化鈦鍍膜 31
3-7-3 鋁合金鈑件V-bending試片準備及實驗步驟 31
3-7-4 鋁合金鈑件V-bending實驗條件 32
第四章鋁合金清淨性與性質分析 34
4-1 材料清淨性分析 34
4-2 鋁合金硬度分析 35
第五章鋁鈑件成形極限分析 37
5-1 成形極限實驗結果分析 37
5-2 成形極限擬合 40
5-3 剷雪機煞車(snow blower press brake)的成形模擬分析 41
第六章鋁鈑件彈回實驗 45
6-1 鋁合金鈑件的Three point bending 45
6-1-1 彈回實驗值分析 45
6-1-2 彈回模擬分析 46
6-2 鋁合金鈑件的Unconstrain bending 47
6-2-1 Unconstrain bending實驗值分析 47
6-2-2 Unconstrain bending模擬分析 48
6-3 鋁合金鈑件的V-bending 50
6-3-1 拋光模具下(表面粗糙度0.18 um)試片的彈回比較分析 50
6-3-2 拋光模具(表面粗糙度0.18 um)的開口對無貼模試片(as received)應變值的影響 50
6-3-3 粗糙表面(表面粗糙度0.78 um)對試片彈回之影響 51
6-3-4 實際產品彈回分析（剷雪機煞車press brake） 51
第七章結論 53
參考文獻: 54

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指導教授

施登士(Teng-Shih shih)

審核日期

2020-8-20

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