Improvement of Hole Geometric Accuracy by Powder Mixed Electro-chemical Discharge Machining Process

Powder Mixed ECDM (Electro-Chemical Discharge Machining)을 이용한 미세구멍가공의 정밀도 개선

Electrochemical discharge machining (ECDM) has been found to be suitable for the micro-hole machining of nonconductive materials such as ceramics or glass compared with existing conventional and also non-conventional machining methods. However this machining process has some problems such as low geometric accuracy and low machining efficiency due to the random spark generation at the end of the electrode. This paper proposes the methods to improve the geometric accuracy of micro-hole using powder mixed ECDM process. The experimental results show the effects of powder producing improved geometric accuracy of machined hole and decreased concentration of spark energy.