Closed blade ring is a type of integral component with superior weight reduction performance

however

it is difficult to machine due to its closed structure

poor openness

narrow and twisted channels

and limited tool feed space. Electrochemical machining (ECM) is a non-traditional machining method

which has the advantages of not being affected by material mechanical properties

no loss of tool cathode

and high machining efficiency. It is one of the important methods for machining closed blade rings. However

there is relatively little research on the flow field of closed blade ring slotting ECM

and the stability of the flow field requires to be improved. Thus

a forward flow liquid supply flow method was proposed for closed blade ring slotting ECM

and flow field simulation and optimization studies were conducted under 1 mm

2 mm

and 3 mm outlet slot widths. The results show that: (1) The cathode with a slit width of 2 mm had better uniformity and accessibility of flow field in the gap. (2) After adjusting the position of the liquid gap and designing the drainage groove structure according to the principle of equal process

the local liquid shortage phenomenon at the edge of the blade has been effectively improved. Three experiments of closed blade ring slotting ECM were conducted under different liquid outlet slot widths. The results show that the cathode with optimized flow field structure can realize stable machining

and the relative feed speed between the tool cathode and the workpiece was increased from 0.79 mm/min to 0.98 mm/min. The surface quality of the channel was relatively optimal

the roughness of the convex surface decreased from 2.681 μm to 1.641 μm

the roughness of the concave surface decreased from 2.482 μm to 1.243 μm. This verifies the effectiveness of the flow method and the correctness of the flow field simulation results.