Efficient Combined Machining of Electrospark-induced Controllable Combustion and Turning Dressing for TC4

摘要

Based on the theory of controllable combustion induced by electrical discharge, a new efficient processing technology, controllable combustion and turning dressing combined machining for TC4, is proposed. First, controllable electrospark-induced combustion occurs between the workpiece and the electrode under the condition of electrical discharge and high-pressure oxygen. Then, a combusted layer and a softening layer are formed on the workpiece, which can be removed by the turning tool. Simultaneously, the turning tool can trim the machined surface. The automatic feed control system of the combustion-inducing electrode and turning tool based on current and cutting force sampling is proposed to provide controllable, stable, and efficient combustion. Experimental results show that the processing method can provide better surface quality and reduce the wear of the electrode and tool. The machining efficiency is 46 times higher than the conventional electrical discharge machining turning and 1.8 times higher than the controllable combustion turning.