臺灣博碩士論文加值系統

本研究目的在於找出銅鐵異種金屬進行電阻點銲銲接之最佳製程參數。故本研究將100×25㎜×1t之鐵材(JIS-G3141 SPCE)和銅材(JIS-C1100)進行電阻點銲之製程，使用直流電之電源供應器來進行電阻點銲實驗，電極材質分別為鉬及鉻銅之平面電極，並探討三種影響之控制因子：銲接電流(Welding Current)、銲接時間(Welding Time)及電極加壓力(Electrode Force)之銲接結果，最後進行拉伸實驗(Tensile-shear test)，對銲塊(nugget)之抗拉強度(Tensile-shear strength)的差異做評估。
本研係透過田口方法(Taguchi Methods)的L8直交表規劃實驗，利用田口方法的因子效應分析及變異數分析(ANOVA)找出最佳製程參數組合，並用倒傳遞神經網路(BPN)協助找出最佳製程參數組合與預測最佳參數組合結果。最後透過確認實驗與計算信賴區間驗證實驗結果。
研究結果顯示使用田口方法、變異數分析及倒傳遞神經網路分析出之最佳參數組合皆為：A2B2C1，即銲接電流12(kA)、銲接時間6(cycles)以及電極加壓力240(kg)。經確認實驗也可以知道此最佳參數組合具再現性(Reproducibility)，可知此參數組合為加工條件範圍內之最佳參數組合。

This research is about the optimization study on Cu-Fe dissimilar metals in DC Resistance Spot Welding. In this study, 100 mm × 25 mm × 1t mm material of iron (JIS-G3141 SPCE) and copper (JIS-C1100) for resistance spot welding processes, use DC power supplies for resistance spot welding. Electrode materials were for the molybdenum and chromium copper alloy plane electrode. Study of three influencing control factors: welding current, welding time and the electrode force of the welding results. Finally, Used Tensile-shear test to assessed differences of Tensile-shear strength and nugget.
This study had used Taguchi method of the L8 orthogonal array to plan the experiment, the Taguchi method of factor analysis and ANOVA to identify the optimum process parameters, and use back-propagation network (BPN) to assist in identifying optimum process parameters and predict the optimum process parameters results. Eventually, by the confirmation test and verify the results calculated confidence interval.
The results show that using the Taguchi method, ANOVA, and the back-
propagation network of the optimum process parameters are: the welding current 12 (kA), welding time 6 (cycles) and the electrode force 240 (kg). The experiment also confirmed that the optimal combination of parameters with a reproducibility.

中文摘要 i
英文摘要 ii
誌謝 iv
目錄 v
表目錄 vii
圖目錄 ix
第一章 緒論 1
1.1 研究背景 1
1.2 研究動機與目的 2
1.3 研究限制 3
1.4 研究步驟與流程 4
第二章 文獻探討 6
2.1電阻點銲 6
2.1.1電阻點銲之基本原理 7
2.1.2銲接機器設備 9
2.1.3電極材料 11
2.1.4影響電阻點銲之因素 12
2.1.5銲接品質之檢驗方法 15
2.2田口方法 16
2.3類神經網路 17
第三章 研究方法 20
3.1實驗材料 20
3.1.1銅 20
3.1.2鐵 21
3.2實驗試片 21
3.3實驗設備及儀器 22
3.4實驗流程 26
3.4.1電阻點銲之實驗 26
3.4.2拉伸試驗 28
3.5實驗數據解析方法 28
3.5.1田口方法 29
3.5.2變異數分析 29
3.5.3倒傳遞網路 32
第四章 實驗分析 33
4.1實驗數據解析 33
4.1.1田口方法 33
4.1.2倒傳遞網路 46
4.1.3實驗推定與評估 58
4.1.4確認實驗 59
4.2實驗結果分析 60
第五章 結論與建議 64
5.1 結論 64
5.2 建議 65
參考文獻 66
附錄A 電阻點銲銲接結果 70
附錄B 拉伸試驗結果 73
附錄C 拉伸試驗數據 76

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