(100.24.122.117) 您好!臺灣時間:2021/04/12 05:46
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:張宏誌
研究生(外文):Hung-Chih Chang
論文名稱:應用能量法於圓杯深引伸成形最佳化胚料設計與雙曲率曲面衝壓成形彈回預測
論文名稱(外文):The Blank Optimum Design of a Cylindrical Cup Drawing and the Springback Prediction of Double-Curvature Surfaces Stamping Using Energy Method
指導教授:許進忠許進忠引用關係
指導教授(外文):Jinn-Jong Sheu
學位類別:碩士
校院名稱:國立高雄應用科技大學
系所名稱:模具工程系碩士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:94
中文關鍵詞:材料異向性胚料最佳化應變能量法彈回預測雙曲率曲面
外文關鍵詞:AnisotropyBlank optimizationStrain energy methodSpringback predictionDouble curvature surface
相關次數:
  • 被引用被引用:2
  • 點閱點閱:247
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:10
  • 收藏至我的研究室書目清單書目收藏:4
本研究利用應變能量法進行圓杯引伸胚料最佳化與雙曲率曲面衝壓品彈回預測,並藉此建立一套系統化之鈑金成形設計法則。在胚料最佳化的部分,本文針對圓杯深引伸成形品,以能量法與均勻變形法進行初始胚料設計,再利用四階之Bezier曲線表示胚料外形,將控制點與材料異向性因子結合,以田口實驗設計法及有限元素分析,得到影響鈑金成形的要因,以黃金分割法更新控制點,得到最佳化胚料外形。

本研究亦針對雙曲率曲面衝壓品進行彈回預測,於應變能量法中導入材料平均異向性因子,求出成形之應變場,進行彈塑性應變與應力分析,以預測其彈回,並探討材料異向性對彈回之影響。

本研究實際進行圓杯深引伸成形及雙曲率曲面衝壓成形試驗,應變與彈回結果與本文所提出之理論預測證相近,顯示本文所提出之設計及預測方法之正確且具有可行性。本文結合影像處理技術,開發影像量測程式,可直接量測成品尺寸,其誤差在可接受範圍。研究成果顯示,本文所提出之最佳化胚料計方法、成品彈回預測理論及影像量測系統可快速完成設計、分析、製造與品管之鈑金成形整合設計。
In this study, the energy method is adopted to obtain the optimum blank design of a cylindrical cup deep drawing and predict the springback of a stamped part with double curvatures. A systematic design method of sheet metal forming process is finally developed. Both of the energy method and uniform deformation theory are adopted to create the bound of initial blank design, a fourth-order Bezier curve is created automatically to describe this blank profile. The Taguchi method has been applied to study the effect of the design parameters including the control points of Bezier curve and the anisotropy of material. The integration of FEM simulation and the Golden section method updates the control points of Bezier curve to obtain the final optimum blank profile.

The springback of a double curvature stamped part is also studied via the proposed energy method considering the average normal anisotropy of material. The strain distributions are obtained via the minimization of energy consumption, the elastoplastic strain and stress analysis is followed to predict the springback of product. The effect of anisotropy on the springback is also discussed.

The experiments of a cylindrical cup deep drawing and a double curvature part stamping are carried out. The strain and deformed geometry results of experiment and prediction are in good agreement. It shows the proposed method and the developed system are feasible and applicable. The developed image processing system is also capable of measuring product dimensions in an acceptable accuracy. The research results have demonstrated the proposed methods and the developed systems are capable of doing the integration of blank design, process analysis, and quality control of sheet metal forming.
摘要 I
ABSTACT II
致謝 IV
目錄 V
表目錄 VII
圖目錄 VIII
符號說明 XI
一、緖論 1
1.1前言 1
1.2文獻回顧 2
1.3研究動機與目的 4
1.4研究範疇 5
二、理論探討 7
2.1衝壓製程與成形分析法 7
2.1.1衝壓模具設計法 7
2.1.2材料異向性理論 9
2.1.3有限元素法理論 10
2.2胚料最佳化 12
2.2.1 Bezier 曲線理論 12
2.2.2田口式品質設計法 14
2.2.3黃金分割法 16
2.3考慮材料異向性之應變能量法分析理論 18
2.3.1薄膜理論 18
2.3.2考慮材料異向性之應變能量法 19
2.3.3數值最佳化理論 23
2.3.4彈回分析理論 25
2.4影像處理理論 27
2.4.1影像前處理理論 27
2.4.2影像校正與量測方法 29
2.4.3異向性影像搜尋法則 30
2.5材料性質理論 31
三、研究方法與步驟 34
3.1衝壓成形胚料最佳化 35
3.1.1定義最佳化目標 35
3.1.2田口實驗設計法實驗規劃 37
3.1.3胚料外形控制點更新法則 39
3.1.4 CAD/CAE/CAM整合程式 40
3.1.5影像處理量測 42
3.2雙曲率曲面設計 43
3.2.1雙曲率曲面設計 43
3.2.2雙曲率曲面胚料展開設計 45
3.3實驗規劃 47
3.3.1圓杯深引伸實驗 47
3.3.2曲面衝壓成形實驗 50
四、結果與討論 53
4.1胚料最佳化結果討論 53
4.1.1製程要因分析 53
4.1.2田口最佳化設計 56
4.1.3胚料外形控制點更新 57
4.1.4杯高輪廓與胚料外形比較 58
4.2影像處理量測結果 61
4.2.1量測精度驗證 61
4.2.2影像自動量測與異向性位置判斷 63
4.3雙曲率曲面衝壓成形應變分析與彈回分析結果 64
4.3.1電腦輔助成形分析系統 64
4.3.2單曲率曲面成形分析與彈回分析結果 67
4.3.3雙曲率曲面成形分析結果 69
4.3.4雙曲率曲面成形彈回分析結果 74
4.3.5材料異向性對彈回現象之影響 77
4.3.6材料k、n值對彈回量之影響 84
五、結論 88
5.1胚料最佳化 88
5.2影像處理量測 88
5.3雙曲率曲面衝壓成形應變分析與彈回分析 89
六、未來展望 90
參考文獻 91
簡歷 94
1.Chen, X., Sowerby, R., 1996, “Blank development and the prediction of earring in cup drawing”, International Journal of Mechanical Sciences, Vol.5 pp.509
2.Zaky, A.M., Nassr, A.B., G.El-Sebaie, M., 1998, “Optimum blank shape of cylindrical cups in deep drawing of anisotropic sheet metals”, Journal of Materials Processing Technology, Vol.76, pp.203-211
3.Park, S.H., Yoon, J.W., Yang, D.Y., Kim,Y.H., 1999, “Optimum blank design in sheet metal forming by the deformation path iteration method”, International Journal of Mechanical Sciences, Vol.41, pp.1217-1232
4.Lee, C.H., Huh, H., 1998, “Three dimensional multi-step inverse analysis for the optimum blank design in sheet metal forming process”, Journal of Materials Processing Technology, Vol.80-81, pp.76-82
5.Lu, Yuung-Hwa, Li, Ching-Lun, Lo, Sy-Wei, 2000, “A study of the optimum blank for square cup drawing using the streamline method”, Journal of Materials Processing Technology, Vol.110, pp.146-151
6.Shim, Hyunbo, Son, Kichan, Kim, Kwanghee, 2000, “Optimum blank shape design by sensitivity analysis”, Journal of Materials Processing Technology, Vol.104, pp.191-199
7.Son, Kichan, Shim, Hyunbo, 2003, ”Optimal blank shape design using the initial velocity of boundary nodes”, Journal of Materials Processing Technology, Vol.134, pp.92-98
8.葉豐輝, 盧永華, 李經綸, 林宜暈, 吳銘宗, 2004 ”圓杯引伸異向性料片最佳化之研究”, 中國機械工程學會第21屆全國學術研討會論文集
9.Sanchez, L. Rafael, 2000, “A new cyclic anisotropic model for plane strain sheet metal forming”, International Journal of Mechanical Sciences, Vol.42, pp.705-728
10.Kim, Jong-Bong, Yang, Dong-Yol, Yoon, Jeong-Whan, Barlat, Frederic, 2000 ”The effect of plastic anisotropy on compressive instability in sheet metal forming”, International Journal of Plasticity, Vol.16, pp.649-676
11.Samuel, M., 2000, ”Experimental and numerical prediction of springback and side wall curl in U-bendings of anisotropic sheet metals”, Journal of Materials Processing Technology, Vol.105, pp.382-393
12.Ragai, Ihab, Lazim, Duraid, Nemes, James A., 2005, “Anisotropy and springback in draw-bending of stainless steel 410: experimental and numerical study”, Journal of Materials Processing Technology, Vol.166, pp.116-127
13.Danckert, J. , Nielsen K.B., 1998, “Determination of the plastic anisotropy r in sheet metal using automatic tensile test equipment”, Journal of Materials Processing Technology, Vol.73, pp.276-280
14.Chamanfar, A., Mahmudi, R., 2005, “Compensation of elastic strains in the determination of plastic strain ratio (R) in sheet metals”, Material Sciences & Engineering A, Vol.397, pp.153-156
15.Zhang, L. C., Lin, Z., 1997, “An analytical solution to springback of sheet metals stamped by a rigid punch and an elastic die”, Journal of Materials Processing Technology, Vol.63, pp.49-54.
16.Lee, S.W., Yang, D.Y., 1998, “An assessment of numerical parameters influencing springback in explicit finite element analysis of sheet metal forming process”, Journal of Materials Processing Technology, Vol.80-81, pp.60-67
17.Xue, P., Yu, T. X., Chu, Edmund, 2001,” An energy approach for predicting springback of metal sheets after double-curvature forming, Part I : axisymmetric stamping”, International Journal of Mechanical Sciences, Vol. 43, pp.1893-1914.
18.Xue, P., Yu, T. X., Chu, Edmund, 2001,” An energy approach for predicting springback of metal sheets after double-curvature forming, Part II: Unequal double-curvature forming”, International Journal of Mechanical Sciences, Vol. 43, pp.1915-1924.
19.Pourboghrat, Farhang, Karabin, Michael E., Becker, Richard C., Chung, Kwansoo, 2000, “A hybrid membrane/shell method for calculating springback of anisotropic sheet metals undergoing axisymmetric loading”, International Journal of Plasticity, Vol.16, pp.677-700.
20.周岳平, 2003, 板金液壓成形回彈分析, 逢甲大學機械工程學系碩士班, 碩士論文
21.Palaniswamy, Hariharasudhan, Ngaile, Gracious, Altan, Taylan, 2004, “Optimization of blank dimensions to reduce springback in the flexforming process”, Journal of Materials Processing Technology, Vol.146, pp.28-34
22.江孟恩, 2006, 鈑金衝壓產品彈回分析及控制-以高爾夫球頭打擊面應用為例, 國立高雄應用科技大學模具工程系碩士班, 碩士論文
23.周金龍, 許光城, 李榮顯, 1991, “影像處理技術於金屬成形分析應用之發展”,機械月刊, 十七卷, 十二期
24.郭彥甫, 林達德, 王嘉銳, 2004, ”應用影像處理技術輔助植物葉片之幾何模擬”, 農業機械月刊, 第13卷, 第二期
25.Koplowitz, Jack, 1996, ” Hierarchical Representation of Chain-Encoded Binary Image Contours”, Computer vision and image understanding, Vol. 63, pp. 2
26.Hsu, Q.C., 2003, “Comparison of Different Analysis Models to Measure Plastic Strains on Sheet Metal Forming Parts by Digital Image Processing,” International Journal of Machine Tools & Manufactures, Vol. 43, pp. 515-521.
27.Hsu, Q.C., 2003, “Theoretical and Experimental Study on the Hydroforming of Bifurcation Tube,” Journal of Materials Processing Technology, Vol.142, pp. 367-373.
28.林威智, 2002, 應用微影技術於鈑金成形網格尺寸效應之研究, 國立成功大學機械工程研究所, 碩士論文
29.Tsai, P., Chang, C.C., Hu, Y.C, 2002, “An Adaptive Two-Stage Edge Detection Scheme for Digital Color Images”, Real-Time Imaging, Vol. 8, Issue 4, pp. 329-343
30.Qu, Y.D., Cui, C.S., Chen, S.B., Li, J.Q, 2005, “A fast subpixel edge detection method using Sobel–Zernike moments operator”, Image and Vision Computing , Vol. 23, Issue: 1, pp. 11-17,Jan. 1
31.Hsu, Quang-Cherng, Sheu, Jinn-Jong and Yang, Jin-Suen, 2005, ” Critical Safety Device for Forging Machinery by Image Processing Technology”, Journal of the Chinese Society of Mechanical Engineers, Vol.26, No.5, pp.637-642.
32.金屬工業研究發展中心編著,1998, 衝壓模具設計手冊, 金屬工業研究發展中心, 高雄
33.Chen, W.F. , Han, D.J. , Plasticity for Structural Engineer, Gau Lih Book co., LTD
34.Kobayashi, Shirō, 1989, Metal Forming and the Finite-Element Method, Oxford University Press
35.Lee, Kunwoo, 1999, Principles of CAD/CAM/CAE Systems, Addison Wesley Longman, Inc.
36.吳復強, 2002, 田口品質工程, 全威圖書出版, 臺北縣五股鄉
37.Belegundu, Ashok D., Chandrupatla, Tirupathi R., 2003, Optimization concepts and applications in engineering, Pearson Education Taiwan Ltd., pp.36
38.Hu, Weilong, Wang, Z.R., 2002, “Anisotropic characteristics of materials and basic selecting rules with different sheet metal forming processes”, Journal of Materials Processing Technology, Vol.127, pp.374-381
39.許進忠,1991, 金屬擠伸模具與製程之電腦輔助最佳化設計,國立成功大學機械工程研究所,博士論文
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔