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博碩士論文 etd-0801115-145313 詳細資訊
Title page for etd-0801115-145313
論文名稱
Title
使用無探針工具於鋁合金板之摩擦攪拌搭接研究
Studies on Friction Stir Lap Welding of Aluminum Alloy Sheets using Pinless Tool
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
81
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
2015-07-29
繳交日期
Date of Submission
2015-09-01
關鍵字
Keywords
鋅置換、鍍鋅、無探針銲接工具、摩擦攪拌搭接
zinc coating, pinless tool, FSLW, zincating
統計
Statistics
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The thesis/dissertation has been browsed 5655 times, has been downloaded 41 times.
中文摘要
本研究使用定負荷之高轉速摩擦攪拌銲接機,以及直徑6 mm之高速鋼無探針銲接工具,對鋁合金板件進行搭接點銲實驗。探討接合面粗糙度與鋅鍍層厚度對銲接品質之影響。
首先在主軸轉速(15000 rpm)、正向負荷(400 N)與銲接時間30秒,探討不同接合面粗糙度對破壞負荷的影響;從其結果選擇最佳接合面粗糙度,在主軸轉速(9000~15000 rpm)與正向負荷(300~400 N)之操作條件下,探討鋁合金板件之銲接機制與銲接特性,並歸納結果得出接合面溫度之經驗公式。
依據接合面溫度經驗公式選擇主軸轉速(15000 rpm)與正向負荷(400 N)之銲接參數,分別使用鋅酸鹽、硝酸鋅與硫酸鋅作為電鍍液在試片上沉積鋅鍍層,比較不同電鍍液對鍍層品質之影響,探討不同鍍層厚度(2、4、8、12、24 μm)對銲接品質之影響。由實驗可以得知,使用硫酸鋅作為電鍍液在試片上沉積鋅鍍層,可獲得較佳之鍍層品質,二次鋅置換表面處理之銲接品質又高於一次鋅置換表面處理之試片,在相同銲接條件下,上下板鍍層厚度為12 μm時,破壞負荷達到飽和值,為無電鍍層之破壞負荷的1.18倍。
Abstract
Abstract
In this study, the friction stir lap welding (FSLW) is conducted at high rotating speeds with constant loads for aluminum alloy sheets using the pin-less tool made of high speed steel with a diameter of 6 mm. Effects of zinc coating thickness and roughness of faying surfaces on the welded quality are investigated.
First, effect of roughness of faying surfaces on the maximum fracture load is investigated at the rotating speed of 15000 rpm, the normal load of 400 N, and the welding time of 30 seconds to determine the most appropriate roughness. At the rotating speed (9000~15000 rpm) and the normal load (300~400 N), the welding mechanism and welded characteristics of aluminum alloy sheets are discussed. The empirical formula of interface surface temperature is derived.
According the empirical formula, the rotating speed of 15000 rpm and the normal load of 400 N is selected as the operating parameter to investigate the effect of zinc coating thickness on the welded quality. Zincate, zinc nitrate and zinc sulfate are used as the plating solution to deposit zinc coating on the specimens, and the effect of plating solution on the coated quality is discussed. Effect of zinc coating thickness (2, 4, 8, 12, 24 μm) on the welded quality is investigated. Results show that the best quality of zinc coating can be obtained using the zinc sulfate as a plating solution. The coating quality of secondary zinc substitution surface treatment is better than that of a zinc substitution surface treatment. In the same welding condition, the maximum fracture load can achieve a saturation value when both zinc thickness of upper plate and lower plate are 12 μm, which is about 1.18 times as strong as that without coating.
目次 Table of Contents
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 3
1.2.1鋁合金之摩擦攪拌搭接銲接 3
1.2.2異種金屬之摩擦攪拌搭接 7
1.2.3鋁合金電鍍 8
1.3 研究目的 10
第二章 實驗設備與實驗方法 13
2.1 實驗設備 13
2.1.1 高速主軸模組 14
2.1.2 進給模組 14
2.1.3 氣壓模組 15
2.2 摩擦攪拌銲接試片與工具 15
2.2.1 鋁合金銲接試片材料特性 15
2.2.2銲接工具幾何外觀 16
2.3實驗治具與設計 17
2.4實驗方法 19
2.4.1實驗參數規劃 19
2.4.2銲接位置 20
2.4.3實驗前處理I 21
2.4.4實驗前處理II:鋁合金電鍍 22
2.4.5實驗步驟 24
2.5表面粗糙度與鍍層厚度量測 24
2.6接合面溫度量測 25
2.7銲點下陷深度量測 26
2.8拉剪強度試驗 27
2.9實驗流程 28
第三章 結果與討論 29
3.1前導實驗:銲接時間效應 29
3.2 接合面粗糙度對銲接品質之探討 31
3.2.1不同接合面粗糙度對破壞負荷之影響 31
3.2.2主軸轉速與負荷效應 34
3.2.3 正向負荷與主軸轉速對接合面溫度之影響 43
3.3 鍍層厚度對銲接品質之探討 44
3.3.1不同電鍍液對鍍層與銲接品質之影響 44
3.3.2破斷面之SEM觀察 58
第四章 結論與未來展望 65
4.1結論 65
4.2未來展望 66
參考文獻 67
參考文獻 References
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