Ti-6Al-4V is a lightweight,extremely strong material with high resistance to corrosion and is widely used in aerospace industries,medical implants and many more.Contour cutting in such material with sharp corner radiu...Ti-6Al-4V is a lightweight,extremely strong material with high resistance to corrosion and is widely used in aerospace industries,medical implants and many more.Contour cutting in such material with sharp corner radius,narrow kerf width,and maintaining high dimensional accuracy and surface integrity is a challenge for the modern manufacturing industry.Wire Electrical Discharge Machining(WEDM) is a feasible process to meet the above challenges.However,proper control of process parameters is highly necessary for quality cutting of such material.In order to meet the above challenges,the present work focuses on the optimum selection of different process parameters such as pulse-on time(T_(ON)),pulse-off time(T_(OFF)),spark gap voltage(SV) and wire feed rate(WF) using Taguchi-based Multi Response Signal to Noise ratio(MRSN) technique.This is a very simple multi response optimization technique to simultaneously optimize vital responses like thickness of white layer formed on the machined surfaces,average crack density,surface roughness and dimensional accuracy,without the assistance of any software.Moreover,simple regression models are developed to determine the above responses for any combination of process parameters.Industry personnel will find this study useful in utilizing this expensive non-conventional machining method in a techno-economic manner.展开更多
In this work an attempt was made to minimize the NOx emission of a crude rice bran oil methyl ester (CRBME) blend with less sacrifice on smoke density and brake thermal efficiency. Three factors namely fuel injection ...In this work an attempt was made to minimize the NOx emission of a crude rice bran oil methyl ester (CRBME) blend with less sacrifice on smoke density and brake thermal efficiency. Three factors namely fuel injection timing, percentage EGR and fuel injection pressure were chosen as the influencing factors for the set objective. Experiments were designed by employing design of experiments method and Taguchi’s L9 orthogonal array was used to test the engine. MRSN ratio was calculated for the response variables and the optimum combination level of factors was obtained simultaneously using Taguchi’s parametric design. ANOVA was employed to analyze the variance of MRSN and the most influencing factor for the set objective was taken from the ANOVA table. Obtained combination was confirmed experimentally and significant improvement was observed in the response variables.展开更多
文摘Ti-6Al-4V is a lightweight,extremely strong material with high resistance to corrosion and is widely used in aerospace industries,medical implants and many more.Contour cutting in such material with sharp corner radius,narrow kerf width,and maintaining high dimensional accuracy and surface integrity is a challenge for the modern manufacturing industry.Wire Electrical Discharge Machining(WEDM) is a feasible process to meet the above challenges.However,proper control of process parameters is highly necessary for quality cutting of such material.In order to meet the above challenges,the present work focuses on the optimum selection of different process parameters such as pulse-on time(T_(ON)),pulse-off time(T_(OFF)),spark gap voltage(SV) and wire feed rate(WF) using Taguchi-based Multi Response Signal to Noise ratio(MRSN) technique.This is a very simple multi response optimization technique to simultaneously optimize vital responses like thickness of white layer formed on the machined surfaces,average crack density,surface roughness and dimensional accuracy,without the assistance of any software.Moreover,simple regression models are developed to determine the above responses for any combination of process parameters.Industry personnel will find this study useful in utilizing this expensive non-conventional machining method in a techno-economic manner.
文摘In this work an attempt was made to minimize the NOx emission of a crude rice bran oil methyl ester (CRBME) blend with less sacrifice on smoke density and brake thermal efficiency. Three factors namely fuel injection timing, percentage EGR and fuel injection pressure were chosen as the influencing factors for the set objective. Experiments were designed by employing design of experiments method and Taguchi’s L9 orthogonal array was used to test the engine. MRSN ratio was calculated for the response variables and the optimum combination level of factors was obtained simultaneously using Taguchi’s parametric design. ANOVA was employed to analyze the variance of MRSN and the most influencing factor for the set objective was taken from the ANOVA table. Obtained combination was confirmed experimentally and significant improvement was observed in the response variables.
