以田口方法對鍍鋅鋼板進行電離子切割之最佳化分析

本論文主要探討電離子切割參數對於鍍鋅鋼板之影響，並且運用田口方法搭配灰關聯分析對實驗參數進行最佳化，藉此得到鍍鋅鋼板之最佳化電離子切割參數。此研究目標是透過電離子切割與田口方法及灰關聯分析的搭配，進而得到三種厚度之鍍鋅鋼板的最佳化切割參數，並且能夠使三種厚度之鍍鋅鋼板的熔渣厚度、切割表面錐度及切割表面粗糙度獲得有效改善。本研究所使用之電離子切割機為HOTWELL公司的P80HFC，並藉由AutoCAD設定尺寸參數並繪製切割圖形。接著使用電離子切割軟體進行電離子切割之各項參數設定。最終透過田口方法搭配灰關聯對實驗數據進行最佳化分析，進而獲得最佳化切割參數及最佳的切割品質。由實驗結果得知，厚度2mm的鍍鋅鋼板其熔渣厚度之改善率為35%，切割表面錐度之改善率為13%，切割表面粗糙度之改善率為34%。厚度4mm的鍍鋅鋼板其熔渣厚度之改善率為52%，切割表面錐度之改善率為36%，切割表面粗糙度之改善率為19%。厚度6mm的鍍鋅鋼板其熔渣厚度之改善率為29%，切割表面錐度之改善率為7%，切割表面粗糙度之改善率為40%。透過上述之方法能有效地提升切割品質，因此以田口方法及灰關聯分析達到本研究之目標，此研究方法並可進一步推廣至其他材料應用。

關鍵字

電離子切割；切割品質；田口方法

並列摘要

This paper presents investigation on effect of plasma cutting parameters for the galvanized steel plate by quality analysis. The experimental parameters were optimized by Taguchi method combined with grey relational analysis and the optimal plasma cutting parameters of galvanized steel could be obtained. Moreover, the goal is to obtain the best cutting parameters of the galvanized steel plates with different thickness and the dross thickness, the cutting surface taper and the cutting surface roughness can be effectively improved. In this research, the equipment for plasma cutting is the HOTWELL P80HFC, and AutoCAD is used to set the size parameters and draw the cut graphics. Then the plasma cutting software is used to set the parameters of the plasma cutting. Finally, the experimental data are analyzed by Taguchi method combined with gray relational analysis to get the optimal cutting parameters and cutting quality. The experimental results showed that the improvement rate of dross thickness is 35%, the cutting surface taper is 13%, and the cutting surface roughness is 34% for the galvanized steel plate with 2 mm thickness.The improvement rate of dross thickness is 52%, the cutting surface taper is 36%, and the cutting surface roughness is 19% for the galvanized steel plate with 4 mm thickness. The improvement rate of dross thickness is 29%, the cutting surface taper is 7%, and the cutting surface roughness is 40% for the galvanized steel plate with 6 mm thickness. The above results showed that the plasma cutting quality for the galvanized steel plate with different thickness can be effectively improved by Taguchi method combined with gray relational analysis. This method can be certainly further extended to other materials applications.