Simulation and Experimental Study on Flow Field of Ni-Ti Alloy Cardiovascular Stent ElectrochemicalSPolishing
Received:January 16, 2019  Revised:January 23, 2019
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KeyWord:Ni-Ti alloy; cardiovascular stent; flowSfieldSanalysis; electrochemical polishing;SfiniteSelementSmethod
HUANG Zhaoxia 山东理工大学 机械工程学院
LI Zhiyong 山东理工大学 机械工程学院
CHAI Mingxia 山东理工大学 机械工程学院
ZHAO Xin 山东理工大学 机械工程学院
ZHANG Jiexiang 山东理工大学 机械工程学院
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      In view of the influence of different rotational speeds on the field distribution of electro-polished Ni-Ti alloy cardiovascular stents, the ANSYS software was used to simulate the flow velocity distribution of electrolyte during electro-polished cardiovascular stents. The velocity field and eddy current field of electrolyte were analyzed. The influence of the mechanism of electrolytic polishing on the removal mechanism of cardiovascular stent was verified, and the correctness of the simulation results was verified by experiments. The results show that with the increase of the rotational speed, the velocity field distribution is uniform, the eddy current changes are small, the electrolyte is updated in time, the electrolysis products can be discharged in time, the processing precision is improved, and the surface integrity of the polished cardiovascular sent is good; but when the rotational speed is too high the eddy current distribution area is obviously increased, more gas is precipitated, resulting in uneven and discontinuous velocity field distribution, low processing precision, and poor surface integrity of the polished cardiovascular stent.