博碩士論文 983203098 詳細資訊


姓名 吳哲葳(Che-wei Wu)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 超音波輔助沖切加工之斷面品質研究
(Research of the edge profile in trimming process with ultrasonic vibration)
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摘要(中) 本文主要為設計超音波振動模具以及進行反應曲面法實驗,分析超音波振動輔助沖切加工問題,本文設計單行程超音波振動沖切模,分析與量測軸向超音波振動最大振幅與頻率並固定其參數,再分別探討不同模具間隙、剪切角度與沖壓速度對沖切加工時沖頭負載及斷面形狀之效應。結果顯示,加載超音波振動時,間隙與沖壓速度對於改善毛邊垂直高度皆有良好的效應。
摘要(英) The paper employs experiment to analysis the trimming problems with ultrasonic vibration. First the result of design Single metal vibration trimming and blanking model to trim the metal. The different clearance, cutting angle, trimming speed are discussed separately to know the effect of punch load and edge profile in trimming process with vibration punch. The result reveals that ultrasonic vibration can decrease the punch load and improve the quality of edge profile by increasing the cutting angle and appropriate clearance and trimming speed.
關鍵字(中) ★ 沖切 關鍵字(英) ★ trim
論文目次 摘要 i
目錄ii
表目錄 iv
圖目錄 iv
壹、緒論1
1-1前言1
1-2 文獻回顧2
1-3 研究動機與目的6
貳、相關理論與設計7
2-1 沖切基本理論7
2-2 金屬板之斷面形狀8
2-3 超音波基本理論9
2-4模具與振動子設計11
2-4-1沖剪下料模11
2-4-2 藍杰紋振動子(Langevin)14
2-5 反應曲面法與實驗設計15
2-5-1 因子實驗法15
2-5-2 田口法與直交表16
2-5-3 反應曲面法(Response Surface Methodology,RSM)17
2-5-4 Box-behnken準則實驗設計18
2-5-5 迴歸分析19
參、實驗設備與方法21
3-1 實驗設備21
3-1-1 伺服沖床21
3-1-2 資料擷取系統21
3-1-3 Load cell測力計22
3-1-4 CCD電子顯微鏡22
3-1-5 SEM掃描式電子顯微鏡22
3-1-6 超音波訊號產生器22
3-2 實驗方法23
3-2-1 試片規格與準備23
3-2-2 實驗條件23
3-2-3 模具與機台校正24
3-2-4 沖切實驗步驟25
3-3 試片成形斷裂面的量測27
3-3-1 CCD量測儀器與步驟27
3-3-2 SEM量測儀器與步驟28
肆、結果與討論29
4-1 沖切毛邊最佳化實驗29
4-1-1迴歸分析與統計檢定30
4-1-2 速度與間隙對於毛邊高度的影響33
4-1-3 間隙與剪切角對於毛邊高度的影響34
4-1-4 速度與間隙對於毛邊高度的影響35
4-2 振動沖切毛邊最佳化36
4-2-1 振動沖切毛邊實驗條件36
4-2-2 迴歸分析與統計檢定36
4-2-3 振動狀態下間隙與進料角對於毛邊高度的影響38
4-2-4 振動狀態下沖壓速度與剪切角對於毛邊高度的影響39
4-2-5 振動狀態下沖壓速度與間隙對於毛邊高度的影響40
4-3 軸向超音波振動對沖頭負載的效應41
4-4 軸向超音波振動對剪切面的效應42
4-5 驗證實驗.42
伍、結論與建議43
5-1 結論.43
5-2 建議44
陸、參考文獻46
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[3]Ming.Li,“An experimental investigation on cut surface and burr in trimming aluminum autobody sheet”International Journal of Materials Processing Technology,Vol113,pp.81-86,2001
[4]Ridha.Hambli, “Finite element modeling of sheet-metal blanking operations with experimental verification”,Journal of Materials Processing technology,Vol
102,pp.257-265
[5]B.Y.Joo,S.I.Oh,B.H.Jeon, “Development of Micro Punching System” ,CIRP Annals- Manufacturing Technology,Vol50,pp.191-194,2001
[6]Masao.Murakawa,Masahiko.Jin, “The utility of radially and ultrasonically vibrated dies in the wire drawing process”,Vol113,pp.81-86,2001.
[7]Ridha.Hambli, “Prediction of burr height formation in blanking process
Using neural network”International journal of Mechanical Seciences,Vol44,pp.
2089-2102,2002
[8]J.H.Li,H.Du,Y.S.Niu,X.L.Fu “Research of the plastic status parameter and instantaneous clearance of a punching without burr”,Vol129,pp.305-309,2002
[9]Nobuo.Hatanaka,Katsuhiko.Yamaguchi,Norio.Takakura,Takasi.Iizuka, “Simulation of sheared edge formation process in blanking of sheet metals”, Vol140,pp.628-634,2003
[10] S.S.Kim,C.S.Han,Y.-S.Lee“Development of a new burr-free hydro-mechanical punching”,Journal of Materials Processing Technology, Vol 162-163,pp.524-529,2005
[11]Zafer.Tekiner,Muammer.Nalbant,Hakan.Gu ̈ru ̈n“An experimental study for the effect of different clearances on burr,smooth-sheared and blanking force on aluminium sheet metal”,Materials and Design,Vol27,pp.1134-1138,2006
[12]F.Gre ́ban,G.Monteil,X.Roizard,“Influence of the structure of blanked materials upon the blanking quality of copper alloys” ,Journal of Materials Processing Technology,Vol186,pp.27-32,2007
[13]C.Husson,J.P.M.Correia,S.Ahzi, , “Finite elements simulations of thin copper sheets blanking:Study of blanking parameters on sheared edge guility” Journal of Materials Processing Technology,Vol199,pp.74-83,2008
[14]G.J.A.Bing,J.Wallbank, “The effect of using a sprung stripper in sheet metal cutting”,Journal of Materials Processing Technology,Vol200,pp.176-184,2008
[15]A.Mackensen , M.Golle , H.Hoffmann , “Experimental investigation of the cutting force reduction during the blanking operation of AHSS sheet materials”, CIRP Annals – Manufacturing Technology,Vol59,pp.283-286,2010
[16]Weiching Yeh,Tsuhsiao Chu,Shiuansheng Wang,Kuanghua Fuh, Kuanhun Chen, “Finite Element Analsys of Blanking Process by Superimposing Ultrasonic Vibrations”,Advanced Materials Research Vol 201-203 pp.126-132
[17]戴宜傑著,沖壓加工與模具設計,新陸書局,1999年
[18]陳朝光、陳銘崑著,工程圖學,高立圖書,1989年
[19]葉怡成著,實驗計畫法-製程與產品最佳化,五南出版社,2001年
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指導教授 葉維磬 審核日期 2011-7-27
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