Simulation and experimental study of electrolytic polishing of conformal cooling channel
[Introduction]The effects of different process parameters on the electrolytic polishing of inner wall of 316L stainless steel conformal cooling channel need to be studied,to improve the surface quality of inner wall of conformal cooling channel after electrolytic polishing.[Method]The COMSOL numerical simulation software was used to conduct a multi-field coupling analysis considering the flow field,electric field,and temperature field during electrolytic polishing process.The effects of electrolyte flow rate and working voltage on the polishing effectiveness was studied through simulation,which was subsequently verified by experiments.[Result]With the increasing of electrolyte flow rate,the polishing efficiency got worse as shown by a decrease in temperature rise at the outlet and material removal rate,and an increase in surface roughness of inner wall.Conversely,the polishing efficiency got better with the increasing of voltage,as shown by an increase in temperature rise at the outlet and material removal rate,and a decrease in surface roughness of inner wall.The best polishing effect was achieved at a voltage of 25 V and an electrolyte flow rate of 0.3 m/s.The surface roughness of inner wall of conformal cooling channel could be reduced to 0.195 μm after being polished thereunder.[Conclusion]The experimental electrolytic polishing results were consistent with the simulation results,confirming the accuracy of the simulation model and providing important references for optimizing the surface treatment process for inner wall of conformal cooling channel.
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