Research on the Influence of RCUECM on Side Clearance of Micro-small Hole

Abstract

In order to solve the difficulties of the electrolyte reaching into the machining area and discharging the products in the micro-small holes machined by ECM, the device of the inner-jet rotary combined ultrasonic and electrochemical marching (RCUECM) was built. The single factor experiments were carried out and the influence of the various factors on the side clearance was obtained. Based on the single experiments, the factorial experiments were carried out, and the significant machining factors and interaction affecting on the side clearance were obtained and the prediction model was established. As the relative error is too large (10.365%), the response surface experiment was designed. The regression mathematical prediction model of the side clearance and the optimal machining factors were also obtained. Compared with the experiment value and the prediction value, it showed that the maximum relative error is 2.906%, the minimum relative error is 0.008%, and the average relative error is 1.064%, which greatly improved the accuracy of the model. Through the experimental verification of the best machining factors, the results showed that the average relative error compared with the prediction value was 4.72%, and it proves the reliability of the side clearance prediction model obtained, which will provide guidance for the research of micro-small deep holes machined by RCUECM.