非對稱壓延加工參數對板材彎曲行為之實驗研究

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姓名

魏上超(Shang-Chao Wei) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

非對稱壓延加工參數對板材彎曲行為之實驗研究
(Experimental research of asymmetrical rolling with processing parameters of aluminum strip curvature behavior)

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摘要(中)

本文以試片厚度2.9mm及5mm的A1050鋁片來進行非對稱壓延的加工，是以實驗的方法來探討不同加工因子，包含入口試片不同厚度、不同輥輪之輥徑、上下輥輪切線速度比值以及界面之潤滑條件等，對試片的輥輪壓延力、壓延扭矩及彎曲曲率分別於不同縮減率時的變化情形。實驗條件以異徑及同徑異周速為主，並找出曲率為零之臨界縮減率。
藉由本實驗所規劃的加工條件，可得知壓延後之試片曲率受縮減率大小、上下輥輪切線速度比值不同、不同輥輪之輥徑、界面摩擦及試片初始厚度不同等條件的影響，試圖找出曲率值介於±0.0025(1/mm)內的臨界縮減率（即壓延後的成形試片呈現接近平坦的狀態）產生的條件。藉以達到曲率控制，減少壓延道次，以期達到加工能量需求較低之經濟性製程。

摘要(英)

This paper observe aluminum flat A1050 various of curvature ratio at asymmetrical rolling with different specimens thickness (2mm and 2.9mm), and mainly use experiment to discuss with processing different parameters, include different flat thickness, different work rolling ,and different rolling speed, interface between rolling and specimens by lubrication or dry friction and etc., then discuss rolling force, rolling torque and curvature ratio with different reduction at asymmetrical rolling.
By experimental conditions can find out specimens that become curvature turn up or turn down behavior with different reduction, different rolling speed, interface friction and different flat thickness after rolling process. Try to find out the critical reduction that curvature between ±0.0025(1/mm), i.e. curvature is near zero. For the purpose of control the curvature and decrease rolling pass times that can reach lower economical production process.

關鍵字(中)

★ 縮減率
★ 壓延曲率
★ 非對稱壓延

關鍵字(英)

★ rolling curvature
★ critical reduction
★ asymmetrical rolling

論文目次

摘要 I
ABSTRACT II
致謝 III
目錄 IV
圖目錄 VII
表目錄 IX
第一章緒論 1
1-1 前言 1
1-2 非對稱壓延及應用製造簡介 2
1-3文獻回顧 3
1-3-1實驗研究方面 3
1-3-2 理論解析方面 6
1-4 研究動機與目的 8
第二章理論基礎 10
2-1 壓延種類 10
2-1-1對稱壓延 10
2-1-2 非對稱壓延 10
2-2 壓延間之幾何關係 12
2-2-1 壓延速度與中性點 12
2-2-2 壓延量 13
第三章實驗設備與方法 14
3-1 實驗設備 14
3-1-1 冷間壓延機 14
3-1-2 資料擷取系統 15
3-2 實驗方法 16
3-2-1 試片準備 16
3-2-2 實驗條件 16
3-2-3 編號表示意義 18
3-2-4 輥輪與試片之界面潤滑條件 18
3-2-5 輥輪及工作平台之調整 18
3-2-6 輥輪之置換 20
3-2-7 壓延實驗步驟 20
3-3 試片成形曲率之量測 21
3-3-1 曲率計之測定原理 21
3-3-2 曲率量測方法之探討 22
3-3-3 曲率計之校正 22
3-4 單軸拉伸試驗 23
3-5 FORWARD SLIP 實驗 24
第四章結果與討論 26
4-1 拉伸實驗 26
4-2 FORWARD SLIP 27
4-3 壓延實驗 28
4-3-1 平均輥輪直徑對壓延力及壓延扭矩之比較 30
4-3-2 周速比對成形試片彎曲曲率之影響 32
4-3-3 試片厚度對異徑異周速成形試片彎曲曲率之影響 36
4-3-4 試片厚度對同徑異周速成形試片彎曲曲率之影響 39
4-3-5 界面摩擦條件對異徑異周速成形試片彎曲曲率之影響 40
4-3-6 界面摩擦條件對同徑異周速成形試片彎曲曲率之影響 42
4-3-7 平均輥輪直徑對成形試片彎曲曲率之影響 44
第五章結論 50
參考文獻 53
附錄A 93
附錄B 100
附錄C 101

參考文獻

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指導教授

王國雄(Guo-Xiong Wang)

審核日期

2010-7-16

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