| 摘要: | 本文使用反應曲面法建立線切割放電加工碳化鎢材料，其過程中表面粗糙度及電極線磨耗的預測模式。採用碳化鎢P10材料為實驗試件，此材料廣泛使用於模具製作方面，並提出一階與二階預測模式將探討其最佳製程參數，包含脈衝時間、峰值電壓、峰值電流、電極線速等四個製程參數，研究表面粗糙度及電極線磨耗之影響。本實驗設計採用中心組合設計(CCD)規劃，在研究中所提出的預測模式經由變異數分析加以分析，结果顯示所提出二階預測模式經由實驗值，證實其獲得預測值非常接近實驗值，且在95%信心指數範圍內。
In this paper, the predictive model of surface roughness (SR) and wire-electrode wear (WW) in the Wire Electrical Discharge Machining (WEDM) process of cemented tungsten carbide using the response surface methodology had been carried out. The cemented tungsten carbide P10 grade, which is widely used in mould and tool applications, was adopted as the workpiece material to explore the performance characteristics of WEDM process. The first and second order models were developed to study the effect of four processing parameters, pulse duration, open discharge voltage, peak current and wire speed on the surface roughness (SR) and wire-electrode wear (WW). The experiment plan adopts the centered composite design (CCD). The predictive models proposed in this study were investigated by the analysis of variance (ANOVA). The second order model in this study have been proved to fit and predict values of the performance characteristics close to those readings recorded experimentally with a 95% confidence interval. |
