尺寸效應對於圓環鍛粗加工變形行為之影響

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蕭喬遠(Chiao-yuan Hsiao) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

尺寸效應對於圓環鍛粗加工變形行為之影響
(The size effect for ring upsetting forging)

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摘要(中)

在塑性變形中圓環鍛粗為最常用來探討摩擦因子之方法，由Kunogi[1]文獻中發現其6:3:2(外徑:內徑:高度)為最常用之圓環比例，上述比例圓環稱之為標準圓環。故本文利用車削製作出標準圓環比例，不同尺寸大小的圓環試片來進行圓環鍛粗加工實驗，探討其圓環試片之實驗結果，針對試片尺寸的不同，其變形結果是否會因尺寸效應的存在而造成摩擦因子的變化為研究重點。

摘要(英)

In plastic deformation, ring upsetting is the most common approach to study friction factors. In the research of Kunogi[1], 6:3:2(outer diameter: inner diameter: height) is considered the most commonly used scale of ring. Rings with the scale mentioned above are called standard rings. In this paper, we use turning to produce ring specimens with the standard scale and in different sizes to conduct ring upsetting experiments. From the experimental result of ring specimens, this paper aims at studying whether the deformation that results from the difference of sizes of specimens result due to the size effects caused by changes in the friction factor for research focus.

關鍵字(中)

★ 尺寸效應
★ 標準圓環
★ 摩擦
★ 鍛粗

關鍵字(英)

★ size effect
★ standard ring
★ upsetting
★ friction

論文目次

摘要 ......................................................... i
Abstract ..................................................... ii
誌謝 ....................................................... iii
目錄 ........................................................ iv
表目錄 ...................................................... vi
圖目錄 ..................................................... vii
第一章緒論 .................................................. 1
1-1前言.................................................. 1
1-2文獻回顧 .............................................. 3
1-3 研究目的與動機 ...................................... 10
1-4 本文流程架構 ........................................ 11
第二章實驗設備與詴片準備 ................................... 12
2-1 實驗設備 ............................................ 12
2-2 實驗方法 ............................................ 12
2-2-1 詴片規格與準備................................. 13
2-2-2 機械性質測詴-MTS 拉伸詴驗 ...................... 13
2-2-3 解釋實驗詴片代碼............................... 15
第三章實驗步驟與量測過程 ................................... 17
3-1 鍛粗實驗條件 ........................................ 17
3-2 量測 ................................................ 18
3-2-1 CCD內徑變化量量測 ............................. 18
3-2-3 CCD內徑桶脹量量測 ............................. 19
第四章結果與討論 ........................................... 21
4-1 尺寸效應-鍛粗實驗結果................................ 21
4-1-1 液態(機油)潤滑條件 ............................. 21
4-1-2 固態(鐵氟龍)潤滑條件 ........................... 21
4-2 內徑側向桶脹之量測結果............................... 22
4-3 摩擦因子 ............................................ 23
4-3-1 液態(機油)潤滑之條件 ........................... 23
4-3-2 固態(鐵氟龍)潤滑之條件 ......................... 23
4-4 單道次與多道次之結果比較 ............................. 23
4-4-1 力量與壓縮量之關係 ............................. 24
4-4-2 內徑變化率 .................................... 25
第五章結論與未來研究方向 ................................... 27
5-1 結論 ................................................ 27
5-2 未來研究方向 ........................................ 27
參考文獻 .................................................... 29
附錄 ........................................................ 34

參考文獻

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指導教授

葉維磬(Wei-Ching Yeh)

審核日期

2012-7-31

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