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研究生:蕭明裕
研究生(外文):Ming-Yu Siao
論文名稱:鍍鋅鋼板磷酸鹽類固體潤滑行為
論文名稱(外文):Tribological Effects of Phosphate Solid Lubricant on Galvanized Sheet Steel
指導教授:羅斯維
指導教授(外文):Sy-Wei Lo
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:機械工程系碩士班
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:2008
畢業學年度:96
語文別:中文
論文頁數:89
中文關鍵詞:固體潤滑劑鍍鋅鋼板金屬成形
外文關鍵詞:Galvanized Sheet SteelSolid LubricantMetal Forming
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本論文以鍍鋅鋼板試片施以滑動引縮實驗 (鋼試片抽拉過一組水平與傾斜之模具之間隙以改變其厚度) 的方式,探討磷酸鹽類之固體潤滑對鍍鋅鋼板界面摩擦的影響。擷取相對滑動時的摩擦力並針對摩擦係數、工件表面之應變分布與鍍層的變化的相互關係加以分析。

實驗採用一種潤滑脂(磷酸鹽類之固體潤滑劑覆膜),三種不同引縮拉伸速度和四種不同正向壓力。引縮拉伸速度為0.001m/s、0.003m/s、0.01m/s三種;正向壓力為20.6MPa、35.8 MPa、51.2 MPa、66.5 MPa四種。利用晶相的研磨與光學顯微鏡觀測鋼板材經引縮實驗的鋅層殘存厚度。

經實驗結果發現在目前實驗的低速度狀態下,其速度對於摩擦力等潤滑行為無明顯的影響。鍍鋅鋼板無論是否披覆磷酸鹽固體潤滑油脂,鋼板材與模具的水平接觸面之摩擦係數低於試片與模具傾斜接觸面之摩擦係數。這是由於傾斜面處工件產生較高的應變與硬化;當縮減率提升時,鋼板材表面鋅層殘存的厚度隨之降低。磷酸鹽覆膜雖然只有在低壓力的情況下能明顯地改善摩擦,但是沒有覆膜之摩擦係數在鋅鍍層約殘留5 �慆時會劇烈地升高,產生不良的影響。
This thesis attends to investigate the effects of the phosphate lubricant on the friction behavior of galvanized sheet steel by a series of ironing experiments where the strip is drawn through gap between horizontal and inclined tool surfaces to change its thickness. The frictions on the tool/workpiece interfaces are detected and employed to analyze the relationship among the friction coefficient, the strain distribution on strip surface, and the variation of the thickness of zinc coating.

One kind of grease (phosphate solid lubricant), three ironing speeds and four normal ironing pressures are used in the experiments. The ironing speeds are assigned as 0.001m/s、0.003m/s、0.01m/s and the normal pressures adopted to reduce the strip thickness are equal to 20.6MPa、35.8 MPa、51.2 MPa、66.5 MPa, respectively. After experiments, the ironed strip is cut and polished for measuring the residual thickness of the zinc coating using an optical microscope.

The results show that in the present low-speed experiments, the ironing speed plays an insignificant role in the tribological behaviors such as the friction force. No matter whether the strip is covered with the phosphate lubricant or not, the friction on the horizontal tool is greater than that on the inclined tool surface, due to the more serious straining and hardening of the strip on the inclined side. The residual thickness of the zinc coating decreases with increasing reduction ratio of the strip thickness. The effect of the solid lubricant becomes substantial merely in the low pressure cases; however, the friction of strip without solid lubricant will soar to result in unfavorable consequences when the residual thickness of zinc reaches approximately 5 �慆
中文摘要 -------------------------------------------------------- i
英文摘要 -------------------------------------------------------- ii
致 謝 -------------------------------------------------------- iii
目 錄 -------------------------------------------------------- iv
表 目 錄 -------------------------------------------------------- vi
圖 目 錄 -------------------------------------------------------- vii
符號說明 -------------------------------------------------------- xi
一、 緒論
-------------------------------------------------------- 1
1.1 研究動機與目的
-------------------------------------------------------- 1
1.2 文獻回顧
-------------------------------------------------------- 2
二、 實驗
-------------------------------------------------------- 7
2.1 前言
-------------------------------------------------------- 7
2.2 擠伸實驗流程
-------------------------------------------------------- 8
2.3 有限元素法
-------------------------------------------------------- 23
三、 實驗結果與討論
-------------------------------------------------------- 26
3.1 前 言
-------------------------------------------------------- 26
3.2 摩擦係數與剪應力變化之觀察
-------------------------------------------------------- 26
四、 結論與未來發展
-------------------------------------------------------- 50
4.1 結論
-------------------------------------------------------- 50
4.2 未來發展
-------------------------------------------------------- 51
參考文獻 -------------------------------------------------------- 52
附錄一 -------------------------------------------------------- 54
附錄二 -------------------------------------------------------- 57
附錄三 -------------------------------------------------------- 70
附錄四 -------------------------------------------------------- 72
自 傳 -------------------------------------------------------- 75
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3.沈哲儀,2002,模具鍍層材料及固態潤滑劑對熱浸渡鋅鋼板在衝壓成形中之影
響評估,私立中華大學,碩士論文。
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5. J. Mackowiask and N. R. Short, International Metals Reviews, No.1, p1-19, 1979.
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工 程學,行政院國家科學委員會補助專題研究報告。
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pp.371-386, 1990.
8. 黃振賢,1990,機械材料,初版,文京圖書,台北市。
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Regime,”ASME J. Tribol.pp.13-23,1988.
11. 蔡昇達,2000,金屬成形邊界潤滑之即時觀測與分析,國立雲林科技大學,
碩士論文。
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pp59-77, 1984.
13. Tong, W., Hector, L. G., Weiland, H., and Wieserman, L. F.,“In-Situsurface
Characterization of a Binary Alumium Alloy During TensileDeformation,”Scripta
Meterialia, pp.1339-1344, 1997.
14. Wilson, W. R. D.,“Mixed Lubrication in Metal Forming, ”, Advanced Technology
of Plasticity 1990, (Japanese Society of Technical of Plasticity), pp. 1667-1675,
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Lubricated Sliding Contact, ”ASME J. Tribol., accepted, 2003.
16.Saha,P.K.and Wilson,W.R.D., “Influence of Plastic Strain on Friction in
Sheet Metal Forming ,”Wear,Vol.172,pp.167-173, 1994.
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