An Experimental Study Based on Surface Microtexture of Medical Devices

Abstract

Surface microstructures formed by jet electrolytic processing are widely used in aerospace and biomedical applications, and their unique process has an important role in medical devices. To improve the precision and usability of medical devices processed using this process, electrolytic characterization and micropit morphology experiments under different processing parameters were carried out to study the effect of EJM processing on processing efficiency and processing quality. The influencing factors of electrolytic machining rate were deduced by electrochemical theory, the electric field simulation was carried out using Comsol to analyze the electric field distribution and current density profile in the micropit, and the actual machining micropit was measured using a scanning microscope. The experiments show that increasing the peak voltage, reducing the machining gap, and extending the machining time can increase the depth of the micropit by 20%–40% and reduce the height of the silo by 45%–65%, which can effectively improve the surface structure of the medical device.