An Analysis Of Micro-Hole EDM Machining On Ti-6A1-4V

Mohd Azuwan, Md Janis (2010) An Analysis Of Micro-Hole EDM Machining On Ti-6A1-4V. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Electrical discharge machining (EDM) is a process where the material removal of the workpiece is achieved through high frequency sparks between the tool (electrode) and the workpiece immersed into the dielectric. It is commonly used to produce moulds and dies, to drill small, burrfree holes and to make prototype quantities of contacts for the aerospace and electronics markets. In this study, micro-hole were fabricated on titanium alloys type of Ti-6AL-4V by using EDM Sodick High Speed EDM Die Sinking AQ55L type. The output responses investigated were material removal rate (MRR), electrode wear rate (EWR) and accuracy of micro hole shape. Full factorial of Design of Experiment (DOE) module in Minitab was used as a principal methodology to examine the effects of voltage, peak current, pulse on duration and pulse off time over output responses. The significant effect of various parameter for each output response was also identified and established. Experimental results indicate that the MRR was mainly affected by interaction between peak current with pulse off time, interaction between voltage with pulse on time and pulse off duration. For the EWR, significant effects were interaction between peak current with pulse on time and interaction between voltages with pulse on time. Finally, for the accuracy micro of hole shape were divided to two result that is result for entrance hole and result for exits hole.

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