| 摘要: | 碳化鎢合金具高硬度、高熔點及低電阻的特性，常被用來做為切削刀具材料、或耐磨半導体薄膜電阻發熱元件等，用途非常廣泛，故其製作及加工方法也愈來愈受到工業界的重視，特別是在精密加工的領域。但也因為碳化鎢合金的硬度過高，若是使用傳統加工方法，如: 鑽、銑、鉋等，會發生材料移除率低、刀具磨耗嚴重等問題。利用電化學加工的電解特性，可解決利用傳統加工上的困擾。然而碳化鎢合金在電化學加工後，表面會有一層氧化層附著在工件表面而阻礙加工，導致電流下降，因此需要藉由外力移除。而本計畫則是擬加入具研磨及電化學加工的複合方法來進行加工。探討加工參數，如: 研磨棒磨料粒度、研磨棒轉速、電解液濃度、操作電壓等，對於金屬材料移除量及加工後表面粗糙度之探討，借由田口實驗法或灰色關聯分析來找出最佳的加工參數。 ;Tungsten carbide alloy with high hardness, high melting point and low resistance characteristics, are widely used as a cutting tool material, wear-resistant semiconductor film resistors or other heating elements. Therefore, the production and processing methods of tungsten carbide alloy becomes more and more important in industry, especially in the field of precision machining.Because of the high hardness of tungsten carbide alloy, the use of traditional processing methods, such as drilling or milling, will yield low material removal rate, serious tool wear and other issues. In stead, the electrochemical processing using electrolytic characteristics can solve the hardly processing problems. However, after the tungsten carbide alloy is electrochemically processed, an oxide layer adheres usually to the surface of the work-piece and obstructs the machining of the work-piece, resulting in a decrease of the current. Therefore, the oxide layer needs to be removed by an external force. A combined grinding and electrochemical processing is proposed here. The influence of the processing parameters, such as: grinding rod abrasive particle size, grinding rod speed, electrolyte concentration, operating voltage, on the removal of metal materials and surface roughness will be investigated. Taguchi method or gray correlation analysis will be applied to find out the optimal processing parameters. |
