利用灰色關聯分析法探究線切割放電於SKD61加工之最佳化參數

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陳玉容(Yu-Rong Chen) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

利用灰色關聯分析法探究線切割放電於SKD61加工之最佳化參數
(Gray Relational Analysis to Explore the Optimal Process Parameters of Wire Electrical Discharge Machining in SKD61 Processing)

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摘要(中)

隨著市場快速的演變，加工生產產品有日趨多樣少量且更新週期越短之模式，為能縮短研發時程且避免因設計錯誤而導致成本浪費，故本研究將針對線切割放電加工SKD61 材料之加工品質特性最佳化及多重加工品質特性分析進行研究。
本研究初始選擇使用田口式實驗法，規劃加工參數以及和該參數不同的水準條件，探討材料移除率、加工擴槽量及表面粗糙度等加工品質特性，經由變異數分析(ANOVA)的推算，分別獲致單因子加工品質特性之顯著加工參數與最佳化加工品質特性之參數組合條件。接者將前階段之田口式實驗法中單因子加工品質特性數據轉化並賦予熵權重，後續再整合灰色關聯分析而成為多重加工品質特性之評估值，進而獲致一最佳化加工參數之組合設定；此外，再代入原本18組數據資料中進行再次運算，驗證上述第19組為最佳化加工參數之組合。
實驗結果顯示，藉由整合灰關聯分析與田口式實驗法之分析，係為可快速獲取多重加工品質特性最佳化參數組合條件的方法。

摘要(英)

The requirements of manufacturing products are shorter product cycles and less production lot in the rapidly changing modern market. It is benefited for the companies that the new products can be provide to the market with fewer designing mistakes, shorter lead time and lower production costs. Recently, gray relational analysis (GRA) has been widely applied to estimate the optimal processing parameters with multiple quality characteristics. Therefore, the gray relational analysis was used in the study to optimal process parameters of WEDM in SKD61 processing.
The study on its early stage was based on the Taguchi method. The control factors and the levels of these control factors were identified after pre-experimental planning. The material removal rate, kerf loss and surface roughness are also analyzed. Through analysis of variance (ANOVA) and F statistic calculation, the significant control factors of each quality characteristic and the optimal combinations of control factors were obtained. The following steps were setting weight for each quality characteristic of the previous Taguchi method and estimating the optimal WEDM parameters with multiple quality characteristics. Optimal WEDM parameters can then be determined by the Taguchi method using the gray relational grade as the performance index. The original 18 sets of data were taken again for calculation with the 19th set of the parameters to verify that the 19th set of the parameters is optimal parameters. The verification experimental results show that optimal WEDM parameters can be determined by using the gray correlation analysis.

關鍵字(中)

★ 田口式實驗法
★ 變異數分析
★ 灰色關聯分析

關鍵字(英)

★ Taguchi Method
★ Analysis of Variance
★ Gray Relation Analysis

論文目次

摘要 ii
英文摘要 iii
誌謝 iv
圖目錄 viii
表目錄 ix
第一章緒論 1
1-1前言 1
1-2研究動機與目的 2
1-3文獻回顧 3
1-3-1放電加工之文獻回顧 3
1-3-2田口實驗法之文獻回顧 4
1-3-3灰色關聯分析之文獻回顧 5
第二章理論基礎 6
2-1基本原理 6
2-1-1線切割放電加工之原理 6
2-1-2放電加工之材料去除機制 8
2-1-3線切割放電加工參數之影響 11
2-1-4線切割放電加工之特性 16
2-2田口實驗法 19
2-3灰色關聯分析法 21
2-3-1數據歸一化 22
2-3-2熵測度權重法 24
2-3-3灰色關聯度 25
第三章實驗流程與設備 27
3-1實驗流程 27
3-2實驗設置 30
3-2-1線電極材料 30
3-2-2工件材料 30
3-2-3加工絕緣液 31
3-2-4草酸 31
3-2-5鑽石研磨膏 31
3-2-6半自動式深孔放電加工機 32
3-2-7線切割放電機 32
3-2-8表面粗糙度儀 33
3-2-9光學顯微鏡 33
3-2-10金相研磨拋光機 34
第四章實驗結果與討論 38
4-1實驗參數選擇之探討 39
4-2單因子加工品質特性分析-田口法 41
4-2-1材料移除率 42
4-2-2加工溝槽寬 45
4-2-3表面粗糙度 47
4-3 多重加工品質特性分析-田口法耦合灰色關聯分析之探討 49
4-3-1 實驗數據歸一化 49
4-3-2 熵權重計算 50
4-3-3 灰色關聯度 52
4-3-4 多重加工品質特性分析 53
4-3-5 再鑄層探討 57
第五章結論 61
5-1結論 61
5-2未來展望 63
參考文獻 64

參考文獻

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指導教授

崔海平(Hai Ping Tsui)

審核日期

2019-7-10

推文