STUDY ON THE TECHNOLOGY OF PRECISION ELECTROCHEMICAL CONTOUR EVOLUTION MACHINING OF INTEGRAL IMPELLERS

摘要

Numerical Controlled Electrochemical Contour Evolution Machining technology is one of the most important development trend in the unconventional machining field. It not only has the advantages of conventional electrochemical machining, but also has the advantages of numerical controlled machining, and ideally suited to the machining of complex shaped components made of high strength, heat-resistant alloys. In this paper, the NC-ECCEM method was simply described, and the equipment and tool-electrode for precision NC-ECCEM of the integral impeller's blades were introduced. The method of determination of the movement path of the tool-electrode relative to the workpiece and the programming method were presented. In order to evaluate the precisions NC-ECCEM method, the experiments for machining one kind of small size integral impeller's blade surfaces by use of the kind of new tool-electrode with rectangle section were carried out. Experimental results showed that the method of precision NC-ECCEM of the integral impeller's blade surfaces can reach higher machining accuracy and good surface quality.