关键词:
Brass tool
Deionized water
Electrical discharge machining
Pulse off time
Pulse on time
Shape memory alloys
Smart materials
摘要:
Considering the importance of titanium alloys in aerospace, automobile and medical industries, the impact of electrical discharge machining (EDM) on smart NiTi60 alloy has been reviewed in this research. In view of the high competition that exists among various industries to lower the time, cost of production, and improve the quality, the parameters of material removal rate (MRR) and tool wear rate (TWR) are highly significant. In this research, the impact of process input parameters such as pulse on time, pulse off time, discharge current (A) and gap voltage (V) on output parameters such as tool wear rate, material removal rate and surface roughness (SR) has been investigated. For the design of experiments (DOE), the Taguchi's method, LI8 orthogonal array and the Minitab@16.1.1 software have been employed. The experiments were performed in the voltage range of 80-250V and discharge current range of *** obtained results indicate that with the increase of voltage and discharge current, the tool wear, workpiece wear and surface roughness increase. Also with the increase of pulse on time, the tool wear increases up to a certain point, and decreases afterwards, but the material removal rate and surface roughness diminish. The results also show that as the pulse off time increases, the tool wear rate, material removal rate and surface roughness diminish.