No abstract

In order to solve the problem that ECM (electrochemical machining) of variable cross-sectional hole is easy to short circuit and the flow pattern is large, a rotating flow field electrochemical machining method is proposed. In this paper, the gap flow field model of variable cross-sectional hole is established, the flow field with different oblique angle of liquid hole is simulated and analyzed. The simulation results show that designing rotating flow field with the outlet hole oblique angle of 45° can improve the electrolyte distribution in machining gap and greatly reduce the low speed zone. Under the conditions of processing voltage 10V, electrolyte inlet pressure 1.6MPa, electrolyte temperature 30℃ and cathode feed speed 5mm/min, the electrochemical machining of variable cross-sectional hole was carried out by using the optimized cathode. The results show that the gap flow field simulation can optimize the cathode structure, shorten cathode design cycle and reduce experiment cost.