Performance Optimization Of H13 Die Steel Machining In An Automated Hybrid Edm System With Rotating Fixture Integration

Abstract

Electrical Discharge Turning (EDT) is a novel and effective technique that combines the benefits of Electrical Discharge Machining (EDM) and traditional turning processes. It is especially advantageous for fabricating complex cylindrical components from hard-to-machine materials like H13 die tool steel. The primary objective of this research is to investigate the machinability of H13 using a rotating workpiece attachment on a die-sinker EDM machine.

A custom-built attachment was designed to enable rotational motion during the EDM process, simulating turning conditions. Taguchi’s design of experiments (DOE) methodology was used for experimental planning, with parameters such as pulse on time, pulse off time, peak current and rotational speed being varied to observe their effects on material removal rate (MRR). The results revealed that peak current significantly affects both MRR and SR, followed by pulse on time.

The highest MRR of 0.328 g/min were achieved under optimized conditions. This study demonstrates the viability of EDT with rotating attachments as an advanced machining solution for producing precision cylindrical parts from high-strength materials.