異徑壓延板材彎曲曲率之實驗研究

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姓名

張東堯(Dong-Yao Jhang) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

異徑壓延板材彎曲曲率之實驗研究
(Experimental Research of Sheets Curvature under Different Diameter Rolling)

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摘要(中)

由於非對稱壓延可有效降低壓延力及壓延扭矩，使材料於壓延製程安排上，更趨自由與多樣性，在壓延工業之應用上，具有極大之助益；但於非對稱壓延後之板材易產生彎曲現象而造成產品品質降低及設備損壞，因此，本文以實驗的方法，尋找曲率之臨界值，即曲率為零之合理範圍。實驗材料為A1050P鋁板，探討其於常溫的情況下，以不同的周速比及縮減率之條件，依據不同初始板厚，進行非對稱壓延中之異徑同周速與異徑異周速壓延實驗。另外，本文亦將針對壓延時，板材和上、下輥輪接觸界面之潤滑油添加與否，做為乾摩擦與濕摩擦之變更條件，藉以探討因摩擦條件的改變，對壓延後之板材曲率所造成的影響。
　　本文主要觀察板材於異徑壓延後彎曲曲率之變化情形，探討曲率與不同初始板厚、周速比、縮減率及潤滑之關係，並討論壓延力、壓延扭矩與周速比及縮減率之關係。藉由本文所得之實驗結果，可提供理論解析之驗證及非對稱壓延製程品質改善之參考。

摘要(英)

Due to the asymmetrical rolling can reduce rolling force and rolling torque that will make rolling process also flexible and variable. There are extreme advantages in application of rolling industry. The specimens will curvature after the asymmetrical rolling, the flat bending will reduce production quality and impact machine, for this reason, this paper use experiment to find out the critical point of curvature, i.e. curvature is zero and the range of reduction. Experiment methods are aluminum flat at mismatch peripheral rolling speed, rolling reduction, and different flat thickness in the room temperature to be asymmetrical rolling by different rolling diameter with the peripheral speed is match or mismatch.
This paper also find out the different condition at the interface between rolling and specimen by lubrication or dry, the effect on change interface condition to investigate curvature behavior.
This paper observe various of curvature ratio at asymmetrical rolling that mismatch rolling diameter with different specimens thickness, mismatch peripheral speed, reduction, lubrication, and discuss rolling force, rolling torque with rolling speed and reduction. The results will supply theory, numeral analysis and process quality improvement.

關鍵字(中)

★ 異徑壓延
★ 曲率

關鍵字(英)

★ Different Diameter Rolling
★ Curvature

論文目次

中文摘要 I
英文摘要 II
誌謝 IV
目錄 V
圖目錄 VII
表目錄 X
第一章緒論 1
1-1 前言 1
1-2 板材非對稱壓延 2
1-3 研究動機 3
第二章理論基礎 4
2-1 壓延種類 4
2-2 文獻回顧 5
2-2-1 實驗研究方面 6
2-2-2 理論解析方面 7
第三章實驗設備與方法 11
3-1 實驗設備 11
3-1-1 壓延機 11
3-1-2 資料擷取系統 11
3-2 實驗方法 12
3-2-1 試片準備 12
3-2-2 實驗條件 13
3-2-3 編號的表示意義 13
3-2-4 潤滑條件 14
3-2-5 輥輪與工作平台調整 15
3-2-6 壓延實驗步驟 16
3-3 成形板材之曲率量測 18
3-3-1 曲率計之校正 18
3-3-2 曲率計之測定原理 18
3-3-3 曲率量測方法之探討 19
3-4 拉伸試驗 20
3-5 環壓試驗 21
第四章結果與討論 25
4-1 拉伸試驗 25
4-2 環壓試驗 26
4-3 異徑壓延實驗 27
4-3-1 壓延力及壓延扭矩之比較 28
4-3-2 周速比與對壓延板材曲率之效應 29
4-3-3 板厚對於異徑同周速壓延板材彎曲曲率的影響 36
4-3-4 板厚對於異徑異周速壓延板材彎曲曲率的影響 37
4-3-5 不同摩擦條件之曲率變化 40
第五章結論 45
參考文獻 48
附錄A 85
附錄B 87

參考文獻

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指導教授

葉維磬(Wei-Ching Yeh)

審核日期

2007-7-21

推文