关键词:
Electro discharge machining
Shape memory alloys
Smart materials
Material removal rate
Rotational EDM
Surface roughness
Nickel Titanium
摘要:
Electro discharge machining is one of the nontraditional machining procedures, which is used for machining the high strength and hardness materials. In this article, the impact of rotational tool and input parameters include;pulse current, pulse on time, voltage and pulse off time, on output parameters such as material removal rate, surface roughness and tool wear rate, in Nickel Titanium alloy with cupper electrode and de-ionized water dielectric has been investigated. Taguchi's design of experiment has been used for statistical analysis of the results. The obtained results indicate that regardless of rotational tool with the increase of pulse current, pulse on time and voltage, material removal rate increases as well. In addition, when the pulse off time increases, the material removal rate diminishes. When the rotational tool revolution is 200RPM, rotational EDM material removal rate decreases in comparison with the traditional EDM. The most important effect of the rotational EDM is on the surface roughness and tool wear. With the increase of pulse current, pulse on time and voltage, without any respect to the rotational tool, surface roughness increases. The surface roughness with rotational EDM is less than traditional EDM. In addition, with the rotational tool, the tool wear rate diminishes in comparison with the traditional EDM. The rotational EDM with 200RPM is led to less material removal rate and better surface roughness and tool wear.