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Optimization of PMEDM process parameter for maximizing material removal rate by Taguchi’s method

Abstract

The electrical discharge machining process is hampered by a low material removal rate (MRR), high tool wear, and low quality of machined surface, which limit its applicability. The use of powder mixed electrical discharge machining helps overcome this drawback and increases the efficiency of the machining process. This study focused on the machining of SKD61, SKD11, and SKT4 die steels using titanium powder. Taguchi methods and analysis of variance were employed to identify the main parameters that affect the MRR. The other process parameters considered were the electrode material, workpiece material, electrode polarity, pulse-on time, pulse-off time, electric current, and titanium powder concentration. The results indicated that electric current, electrode material, and powder concentration were the most significant parameters that influenced the MRR. A powder concentration of 20 g/l increased the MRR by 42.1 %, as compared with no-powder machining. Further, the optimal value of the MRR was determined to be 45.734 mm3/min.

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Correspondence to Nguyen Huu Phan.

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Long, B.T., Phan, N.H., Cuong, N. et al. Optimization of PMEDM process parameter for maximizing material removal rate by Taguchi’s method. Int J Adv Manuf Technol 87, 1929–1939 (2016). https://doi.org/10.1007/s00170-016-8586-4

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Keywords

  • EDM
  • PMEDM
  • MRR
  • Taguchi’s method
  • Signal to noise ratio
  • Titanium powder