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博碩士論文 etd-0825110-161143 詳細資訊
Title page for etd-0825110-161143
論文名稱
Title
小彎曲半徑迴轉拉彎成形之有限元素分析與製程設計
Finite Element Analysis and Process Design for Rotary Draw-Bending with Small Bending Radius
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
94
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2010-06-29
繳交日期
Date of Submission
2010-08-25
關鍵字
Keywords
迴轉拉彎成形、有限元素分析、小彎曲半徑、彎管
small bending radius, finite element analysis, rotary draw bending, bending tube
統計
Statistics
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中文摘要
目前國內工業界在製作小彎曲半徑之管件成形部分所遇之瓶頸,主要為傳統的加工方式無法有效的製作出較小半徑之彎管,故本研究將利用傳統迴轉拉彎成形的方式為基準,並提出不使用穿心的成形方式來達到小彎曲半徑的成形。本文首先是利用傳統的拉彎方式並且除去心軸來做探討,利用有限元素分析探討不同的加工參數下對於無穿心拉彎所成形彎管之增厚率、減薄率以及橢圓率之差異,並且利用以上研究分析成果得到加工之成形範圍。第二部分利用加熱管件的方式,探討熱間成形的可能性以及不同參數對熱間成形的影響,並利用以上之分析結果製作出熱間成形範圍。第三部分進行迴轉拉彎實驗,經由冷間以及熱間的拉彎實驗,可發現在相同加工參數下加熱管件可以有效的提升成形性,並成功得到良好的小半徑彎管,以完成無穿心之小彎曲半徑迴轉拉彎成形之製程。
Abstract
The bottleneck of forming small radius tube is that traditional processing methods can’t effectively produce smaller bend radius tube in domestic industry now. First, this study will propose methods without mandrel, based on traditional bending way of rotary draw bending to form small bending radius tubes. This paper investigate results of traditional bending mode without mandrel in second part. By using finite element analysis, find the effects on wall-thinning, wall-thickening and ovility with different processing parameters. Also using the research results to obtain forming ranges. Through heating tubes we explore the possibility of hot forming of parameters and to find the impacts on bending tubes which heating under different parameters. We use the results above to find out the hot forming ranges. In heating and quenching of rotary draw bending experiments, we found that heating tubes under the same processing parameter can effectively enhance the formability and successfully derive better products of small radius bending tubes, to accomplish non-mandrel rotary bending process of small bending radius.
目次 Table of Contents
總目錄
摘要 II
ABSTRACT III
目錄 IV
表目錄 VI
圖目錄 VII
符號說明 IX

目錄
第一章 緒論 1
1-1前言 1
1-2管材之應用 3
1-3文獻回顧 3
1-3-1彎曲加工方法之文獻 3
1-3-2冷間管件拉彎成形之相關文獻 4
1-3-3熱間管件拉彎成形之相關探討 7
1-4迴轉拉彎成形法之簡介 8
1-5目前迴轉拉彎加工所面臨之困難 10
1-6研究目的及論文架構 11
第二章 管件冷間無穿心迴轉拉彎成形之模擬分析 12
2-1 有限元素分析軟體DEFORMTM簡介 12
2-2管件迴轉拉彎成形之模組建立 15
2-3彎管成形之分析方法說明 16
2-4管件無穿心迴轉拉彎成形之模擬參數設定 18
2-4-1管材網格數之設定 20
2-5管件迴轉拉彎成形之模擬結果與討論 21
2-5-1彎曲速度之探討 21
2-5-2後推進速度之探討 25
2-5-3後推進力量之探討 29
2-5-4不同管壁厚度之探討 33
2-5-5不同材料及管徑之探討 37
2-6管件無穿心迴轉拉彎之成形範圍 40
第三章 無穿心管件熱間彎曲加工之模擬分析 42
3-1管件無穿心熱間拉彎成形模擬之模式建立 43
3-2管件無穿心熱間拉彎成形之模擬參數設定 43
3-3管件無穿心熱間拉彎成形之模擬結果與討論 46
3-3-1加熱溫度之探討 46
3-3-2彎曲速度之探討 51
3-3-3後推進力量之探討 55
3-3-4不同管壁厚度之探討 59
3-4管件無穿心熱間拉彎之成形範圍 62
第四章 無穿心迴轉拉管成形實驗 64
4-1實驗設備及流程 64
4-1-1 迴轉拉彎成形機台簡介 64
4-1-2迴轉拉彎成形實驗流程簡介 66
4-2無穿心冷間拉彎成形實驗與解析結果之比較 67
4-2-1冷間拉彎成形實驗參數設定 67
4-2-2冷間拉彎成形實驗值與解析值之比較 68
4-3無穿心熱間拉彎成形實驗與解析結果之比較 74
4-3-1熱間拉彎成形實驗參數設定 74
4-3-2熱間拉彎成形實驗值與解析值之比較 74
第五章 結論 77
5-1管件冷間無穿心迴轉拉彎成形之模擬結果 77
5-2管件冷間無穿心迴轉拉彎成形之實驗結果 77
5-3管件熱間無穿心迴轉拉彎成形之模擬結果 78
5-4管件熱間無穿心迴轉拉彎成形之實驗結果 78
參考文獻 79
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